To enhance the management level and quality of the automobile transportation logistics supply chain and promote innovation and development in automobile transportation logistics enterprises,it is essential to strength...To enhance the management level and quality of the automobile transportation logistics supply chain and promote innovation and development in automobile transportation logistics enterprises,it is essential to strengthen the construction of the automobile transportation logistics supply chain management model.This can be achieved through the gradual improvement of the automobile transportation logistics management process,ensuring that the management of the automobile transportation logistics supply chain proceeds in an orderly manner.The aim is to improve automobile transportation and logistics service levels while meeting the changing market supply needs.This will enable automobile transportation and logistics enterprises to maintain steady economic benefits and enhance their core competitiveness in the market.Therefore,this paper has conducted a comprehensive exploration and research on managing the automobile transportation logistics supply chain.Corresponding management strategies are proposed as a starting point to achieve the aforementioned goals.展开更多
The defects from electron transport layer,perovskite layer and their interface would result in carrier nonradiative recombination losses.Poor buried interfacial contact is detrimental to charge extraction and device s...The defects from electron transport layer,perovskite layer and their interface would result in carrier nonradiative recombination losses.Poor buried interfacial contact is detrimental to charge extraction and device stability.Here,we report a bottom-up holistic carrier management strategy induced synergistically by multiple chemical bonds to minimize bulk and interfacial energy losses for high-performance perovskite photovoltaics.4-trifluoromethyl-benzamidine hydrochloride(TBHCl)containing–CF_(3),amidine cation and Cl^(-)is in advance incorporated into SnO_(2)colloid solution to realize bottom-up modification.The synergistic effect of multiple functional groups and multiple-bond-induced chemical interaction are revealed theoretically and experimentally.F and Cl^(-)can passivate oxygen vacancy and/or undercoordinated Sn^(4+)defects by coordinating with Sn^(4+).The F can suppress cation migration and modulate crystallization via hydrogen bond with FA^(+),and can passivate lead defects by coordinating with Pb^(2+).The–NH_(2)–C=NH^(+)_(2)and Cl^(-)can passivate cation and anion vacancy defects through ionic bonds with perovskites,respectively.Through TBHCl modification,the suppression of agglomeration of SnO_(2)nanoparticles,bulk and interfacial defect passivation,and release of tensile strains of perovskite films are demonstrated,which resulted in a PCE enhancement from 21.28%to 23.40%and improved stability.With post-treatment,the efficiency is further improved to 23.63%.展开更多
The promotion of electric vehicles(EVs)is restricted due to their short cruising range.It is desirable to design an effective energy management strategy to improve their energy efficiency.Most existing work concerning...The promotion of electric vehicles(EVs)is restricted due to their short cruising range.It is desirable to design an effective energy management strategy to improve their energy efficiency.Most existing work concerning energy management strategies focused on hybrids rather than the EVs.The work focusing on the energy management strategy for EVs mainly uses the traditional optimization strategies,thereby limiting the advantages of energy economy.To this end,a novel energy management strategy that considered the impact of battery thermal effects was proposed with the help of reinforcement learning.The main idea was to first analyze the energy flow path of EVs,further formulize the energy management as an optimization problem,and finally propose an online strategy based on reinforcement learning to obtain the optimal strategy.Additionally,extensive simulation results have demonstrated that our strategy reduces energy consumption by at least 27.4%compared to the existing methods.展开更多
The safety management of urban railway engineering construction involves many different aspects and a wide scope,playing an important role in guaranteeing the safety of construction projects.Management agencies have m...The safety management of urban railway engineering construction involves many different aspects and a wide scope,playing an important role in guaranteeing the safety of construction projects.Management agencies have more stringent requirements on the quality of railway construction.The overall quality of a construction project should meet the construction requirements before the project can be carried out.In this article,the problems in the actual work of the entire life cycle of safety management are explained,and the lessons and experience pertaining to the safety and quality of urban railway construction projects are discussed.The purpose of this paper is to provide references for the management of urban railway construction.展开更多
Purpose:To compare the effectiveness of the interventional limb raising management strategy(ILRMS)to elastic bandage compression at radial vascular access sites following coronary angiographies(CAGs)and percutaneous c...Purpose:To compare the effectiveness of the interventional limb raising management strategy(ILRMS)to elastic bandage compression at radial vascular access sites following coronary angiographies(CAGs)and percutaneous coronary interventions(PCIs).Methods:Patients with ischemic coronary heart disease whose condition was stable over three months were enrolled in this clinical study(n=590;aged 25e80).All participants had just undergone CAG and PCI.Patients were randomized into either the ILRMS group(n=360)or standard post-intervention care with an elastic bandage(n=230).Overall comfort and wrist pain was assessed and the degree of index finger swelling and oxygen saturation was measured on the affected arm.All variables were measured prior to postintervention treatment and again at six hours after CAG and PCI.Results:We found that patients receiving ILRMS had significantly lower wrist pain scores and swelling around the index finger compared to the elastic bandage group(p<0.05).Oxygen saturation of the index finger was not statistically significant(p>0.05).We also found that 19.57%of the elastic bandage patients were comfortable,while ILRMS patients were significantly more comfortable(93.06%;p<0.05).Conclusions:We find that ILRMS alleviates swelling and pain of the wrist more effectively than current practices and improves the degree of overall comfort of patients who undergo CAG and PCI.展开更多
In this paper, a plug-in hybrid electrical vehicle(PHEV) is taken as the research object, and its dynamic performance and economic performance are taken as the research goals. Battery charge-sustaining(CS) period is d...In this paper, a plug-in hybrid electrical vehicle(PHEV) is taken as the research object, and its dynamic performance and economic performance are taken as the research goals. Battery charge-sustaining(CS) period is divided into power mode and economy mode. Energy management strategy designing methods of power mode and economy mode are proposed. Maximum velocity, acceleration performance and fuel consumption are simulated during the CS period in the AVL CRUISE simulation environment. The simulation results indicate that the maximum velocity and acceleration time of the power mode are better than those in the economy mode. Fuel consumption of the economy mode is better than that in the power mode. Fuel consumption of PHEV during the CS period is further improved by using the methods proposed in this paper, and this is meaningful for research and development of PHEV.展开更多
The flux-modulated compound-structure permanent magnet synchronous machine (CS-PMSM), composed of a brushless double rotor machine (DRM) and a conventional permanent magnet synchronous machine (PMSM), is a power split...The flux-modulated compound-structure permanent magnet synchronous machine (CS-PMSM), composed of a brushless double rotor machine (DRM) and a conventional permanent magnet synchronous machine (PMSM), is a power split device for plug-in hybrid electric vehicles. In this paper, its operating principle and mathematical model are introduced. A modified current controller with decoupled state feedback is proposed and verified. The system control strategy is simulated in Matlab, and the feasibility of the control system is proven. To improve fuel economy, an energy management strategy based on fuzzy logic controller is proposed and evaluated by the Urban Dynamometer Driving Schedule (UDDS) drive cycle. The results show that the total energy consumption is similar to that of Prius 2012.展开更多
In order to improve the management strategy for personnel files in colleges and universities,simplify the complex process of file management,and improve file management security and content preservation of the files.T...In order to improve the management strategy for personnel files in colleges and universities,simplify the complex process of file management,and improve file management security and content preservation of the files.This paper elaborates on the application of Artificial Intelligence(AI)technology in university personnel file management through theoretical analysis based on the understanding of Al technology.展开更多
This paper proposes an energy management strategy for a fuel cell(FC)hybrid power system based on dynamic programming and state machine strategy,which takes into account the durability of the FC and the hydrogen consu...This paper proposes an energy management strategy for a fuel cell(FC)hybrid power system based on dynamic programming and state machine strategy,which takes into account the durability of the FC and the hydrogen consumption of the system.The strategy first uses the principle of dynamic programming to solve the optimal power distribution between the FC and supercapacitor(SC),and then uses the optimization results of dynamic programming to update the threshold values in each state of the finite state machine to realize real-time management of the output power of the FC and SC.An FC/SC hybrid tramway simulation platform is established based on RTLAB real-time simulator.The compared results verify that the proposed EMS can improve the durability of the FC,increase its working time in the high-efficiency range,effectively reduce the hydrogen consumption,and keep the state of charge in an ideal range.展开更多
WCDMA Radio Resource Management (RRM) controls the allocation and usage of all radio resources. The purpose of RRM is to have optimal coverage and capacity while ensuring the QoS. RRM directly affects the system perfo...WCDMA Radio Resource Management (RRM) controls the allocation and usage of all radio resources. The purpose of RRM is to have optimal coverage and capacity while ensuring the QoS. RRM directly affects the system performance. As the soul of system control, it includes power control, handoff control, load control, admission control, code allocation, etc. This paper introduces the RRM strategy of ZTE’s WCDMA equipment.展开更多
The total area of grassland in the world is about 50 million km^2, accounting for 33.5% of the total land area (Lieth, 1975). The permanent grassland used by mankind is 33.04 million km^2, accounting for 25.3% of the ...The total area of grassland in the world is about 50 million km^2, accounting for 33.5% of the total land area (Lieth, 1975). The permanent grassland used by mankind is 33.04 million km^2, accounting for 25.3% of the total land area (FAO,1990). Grassland can provide feed for herbivore and produce high-quality food,clothing,medicines and industrial materials for man.On the other hand,it also plays an important role in the fertility of the soil,the conservation of water, the improvement of the environment and maintaining the ecological balance of the Earth’s surface.展开更多
Lateral violence is not uncommon in workplaces.Unfortunately,nursing,a profession that builds its practice on compassion and code of ethics while caring for their patients is not spared from this phenomenon of lateral...Lateral violence is not uncommon in workplaces.Unfortunately,nursing,a profession that builds its practice on compassion and code of ethics while caring for their patients is not spared from this phenomenon of lateral violence.Studies have reported cases of lateral violence among nurses to occur frequently worldwide.The impact of lateral violence has serious repercussions not only on the health of bullied victims but also on the structure and financial spending of the organisation.More importantly,the potential latent impacts on the patients'safety and health is of great concern.This literature review suggests that the contributing factors towards lateral violence are mainly due to characteristics of perpetrators,victims'reaction to bullying and organisation's characteristic.To mitigate the impact of lateral violence among young and inexperienced nurses,a cognitive rehearsal scripted response is proposed to prevent harassment and bullying incidents from becoming a feature at the workplace for nurses.展开更多
The effects of retarding resistance evolution of mixing and sequencing acaricides were studied based on the resistance selection of three acaricides to Tetranychus cinnabarinus in the laboratory.Tetranychus was contin...The effects of retarding resistance evolution of mixing and sequencing acaricides were studied based on the resistance selection of three acaricides to Tetranychus cinnabarinus in the laboratory.Tetranychus was continuously selected with fenpropathrin,abamectin and pyridaban for 28,30 and 31 generations,respectively,and resistance factor increased tp 65.6,7.2and 1.2 time,accordingly.Results of cross-resistance determination suggested that there were no cross-resistance existed among the three acaricides.Analysis of resisance selection and estimation of realized heritability(h^2)or resistance to three single and two mixed acaricides showed that a mixture of fenpropathrin+ abamectin would slow resistance development compared with a sequence of renpropathrin followed by abamectin while the mixture of pyridaben+abamectin and the sequence of pyridaben followed by abamectin would effectively retard resistance evolution.展开更多
A novel parallel hybrid electrical urban bus (PHEUB) configuration consisting of an extra one-way clutch and an automatic mechanical transmission (AMT) is taken as the study subject. An energy management strategy comb...A novel parallel hybrid electrical urban bus (PHEUB) configuration consisting of an extra one-way clutch and an automatic mechanical transmission (AMT) is taken as the study subject. An energy management strategy combining a logic threshold approach and an instantaneous optimization algorithm is proposed for the investigated PHEUB. The objective of the energy management strategy is to achieve acceptable vehicle performance and drivability requirements while simultaneously maximizing the engine fuel consumption and maintaining the battery state of charge in its operation range at all times. Under the environment of Matlab/Simulink, a computer simulation model for the PHEUB is constructed by using the model building method combining theoretical analysis and bench test data. Simulation and experiment results for China Typical Bus Driving Schedule at Urban District (CTBDS_UD) are obtained, and the results indicate that the proposed control strategy not only controls the hybrid system efficiently but also improves the fuel economy significantly.展开更多
The hospital environment in Japan has changed drastically lately. Its unpredictability has increased the need for hospitals to select management strategies to clarify their course. However, research on Japanese hospit...The hospital environment in Japan has changed drastically lately. Its unpredictability has increased the need for hospitals to select management strategies to clarify their course. However, research on Japanese hospitals’ management strategies has only recently begun with too few studies in this area. Hence, this study clarifies the management strategies of Japanese private hospitals. It explores the hospital characteristics that affect strategy selection. A questionnaire was mailed to 5682 private medical institutions in 2013, and 459 responses with no missing data were used for analysis. Factor analysis yielded four factors: “bed conversion and downsizing (Factor 1),” “diversification of medical and nursing care (Factor 2),” “expansion in business scale (Factor 3),” and “expansion of income from non-insured medical care (Factor 4)”. Logistic regression analysis revealed that Year Founded (before 1965), Hospital Location (municipalities with populations smaller than 100,000), Hospital Type (psychiatric hospitals and mixed-care hospital), and Hospital Income and Expenditure (deficit) had significant positive impacts on the choice of Factor 1. For Factor 2, Hospital Type (sanatorium ward and mixed-care hospitals) and Hospital Income and Expenditure (constant surplus) had positive impacts. For Factor 3, Hospital Type (general hospital) and Bed Counts (more than 200) had positive impacts. For Factor4, Hospital Type (general hospital) had positive impacts. In other words, older hospitals, hospitals in rural areas, psychiatric hospitals, mixed-care hospitals, and hospitals with deficits tended to choose bed conversion and downsizing. Sanatorium ward hospitals, mixed-care hospitals, and hospitals with a constant surplus tended to choose diversification of medical and nursing care. General hospitals and large hospitals tended to choose expansion in scale, and general hospitals tended to choose expansion into non-insured medical care. The planning of mid- to long-term management strategies suitable for each hospital and their steady execution are required.展开更多
According to overall mean square root of weighted deviation, presented an evaluation model of geology-technique-social conditions with a significant index system for the estimation of operating quality in productive c...According to overall mean square root of weighted deviation, presented an evaluation model of geology-technique-social conditions with a significant index system for the estimation of operating quality in productive coal mines. In the given example, the evaluation result is used to decide management strategy of coal mine, which plays a guiding role in the production.展开更多
Increasing populations of large carnivores are leading to tension and conflicts with livestock production,a situation that potentially might escalate.In Norway the objective of the large carnivore policy is two-folded...Increasing populations of large carnivores are leading to tension and conflicts with livestock production,a situation that potentially might escalate.In Norway the objective of the large carnivore policy is two-folded:to ensure viable carnivore populations and to secure a sustainable grazing industry.The main instrument is zonation,with carnivore management zones(CMZs)prioritized for reproduction of the large carnivore species separated from other areas prioritized for grazing livestock.The objective of this paper is to describe current knowledge about the impact of the zoning management strategy on the grazing industry.This is done by documenting status and changes in sheep production,losses of livestock to predating carnivores,and the use of grazing areas inside and outside the CMZs.CMZsoffering protection for lynx,wolverine,bear and wolf cover 55%of the Norwegian mainland.30%of the sheep and 50%of the Sami reindeer grazing areas are found inside the CMZs.Livestock(semi-domestic reindeer excluded)is using 59%of the available natural pasture areas outside the CMZs,but only 26%inside the CMZs.The lowest use of available grazing areas was found inside zones for wolves(12%)and brown bears(6%).Livestock in these zones are confined to fenced enclosures,mostly on the farm itself,or moved to pastures outside the management zone for summer grazing.Livestock losses increased in the affected regions during the period when carnivores were reestablished.Later,losses declined when CMZs were established and mitigation efforts were implemented in these zones.The bulk of sheep and reindeer killed by carnivores are now found in boundary areas within 50 km off the CMZs,where sheep are still grazing on open mountain and forest ranges.Therefore,instruments to protect livestock in areas close to the CMZs are also needed.The number of sheep declined inside the CMZs from 1999 to 2014,but increased outside the zones.The reduction in the absolute number of sheep in the CMZs is balanced by a similar increase outside,thus the total sheep production in Norway is maintained.We conclude that although of little consequence for the total food production in Norway,the economic and social impact of the large carnivore management strategy can be serious for local communities and individual farmers who are affected.There is a need for more exact carnivore population monitoring to quantify the carnivore pressure,better documentation of reindeer losses,and a clearer and stricter practicing of the zoning strategy.Increased involvement of social sciences is important in order to understand the human dimension of the carnivore conflicts.展开更多
Energy management strategy (EMS) is the core of the real-time control algorithm of the hybrid electric vehicle (HEV). A novel EMS using the logic threshold approach with incorporation of a stand-by optimization algori...Energy management strategy (EMS) is the core of the real-time control algorithm of the hybrid electric vehicle (HEV). A novel EMS using the logic threshold approach with incorporation of a stand-by optimization algorithm is proposed. The aim of it is to minimize the engine fuel consumption and maintain the battery state of charge (SOC) in its operation range, while satisfying the vehicle performance and drivability requirements. The hybrid powertrain bench test is carried out to collect data of the engine, motor and battery pack, which are used in the EMS to control the powertrain. Computer simulation model of the HEV is established in the MATLAB/Simulink environment according to the bench test results. Simulation results are presented for behaviors of the engine, motor and battery. The proposed EMS is implemented for a real parallel hybrid car control system and validated by vehicle field tests.展开更多
There are many patients in the blood purification center who need maintenance hemodialysis to maintain life. Those patients generally havelow resistance and are easily exposed to coronavirus because they go back and f...There are many patients in the blood purification center who need maintenance hemodialysis to maintain life. Those patients generally havelow resistance and are easily exposed to coronavirus because they go back and forth the hospital and residence three times a week andclosely contact with family, caregivers, community personnel, people in various means of transportation, medical staff, and other patientsvisiting hospital. Therefore, the blood purification center has become a high‑risk environment for the spread of COVID-19 infection. In viewof this, our center quickly responded to the formulation and implementation of infection prevention and control measures suitable for thecharacteristics of the blood purification center and continuous renal replacement therapy (CRRT) emergency plan for fever and suspectedpatients. According to these measures, we have a positive effect on preventing and controlling nosocomial infection in the blood purificationcenter.展开更多
Understanding of how combinations of agronomic options can be used to improve the grain yield and nitrogen use efficiency(NUE) of winter wheat is limited. A three-year experiment involving four integrated management s...Understanding of how combinations of agronomic options can be used to improve the grain yield and nitrogen use efficiency(NUE) of winter wheat is limited. A three-year experiment involving four integrated management strategies was conducted from 2013 to 2015 in Tai'an, Shandong Province, China, to evaluate changes in grain yield and NUE. The integrated management treatments were as follows: current practice(T1); improvement of current practice(T2); high-yield management(T3), which aimed to maximize grain yield regardless of the cost of resource inputs; and integrated soil and crop system management(T4) with a higher seeding rate, delayed sowing date, and optimized nutrient management. Seeding rates increased by 75 seeds m^(–2) with each treatment from T1(225 seeds m^(–2)) to T4(450 seeds m^(–2)). The sowing dates were delayed from T1(5 th Oct.) to T2 and T3(8 th Oct.), and to T4 treatment(12 th Oct.). T1, T2, T3, and T4 received 315, 210, 315, and 240 kg N ha^(–1), 120, 90, 210 and 120 kg P_2O_5 ha^(–1), 30, 75, 90, and 45 kg K_2O ha^(–1), respectively. The ratio of basal application to topdressing for T1, T2, T3, and T4 was 6:4, 5:5, 4:6, and 4:6, respectively, with the N topdressing applied at regreening for T1 and at jointing stage for T2, T3, and T4. The P fertilizers in all treatments were applied as basal fertilizer. The K fertilizer for T1 and T2 was applied as basal fertilizer while the ratio of basal application to topdressing(at jointing stage) of K fertilizer for both T3 and T4 was 6:4. T1, T2, T3, and T4 were irrigated five, four, four and three times, respectively. Treatment T3 produced the highest grain yield among all treatments over three years and the average yield was 9 277.96 kg ha^(–1). Grain yield averaged across three years with the T4 treatment(8 892.93 kg ha^(–1)) was 95.85% of that with T3 and was 21.72 and 6.10% higher than that with T1(7 305.95 kg ha^(–1)) and T2(8 381.41 kg ha^(–1)), respectively. Treatment T2 produced the highest NUE of all the integrated treatments. The NUE with T4 was 95.36% of that with T2 and was 51.91 and 25.62% higher than that with T1 and T3, respectively. The N uptake efficiency(UPE) averaged across three years with T4 was 50.75 and 16.62% higher than that with T1and T3, respectively. The N utilization efficiency(UTE) averaged across three years with T4 was 7.74% higher than that with T3. The increased UPE with T4 compared with T3 could be attributed mostly to the lower available N in T4, while the increased UTE with T4 was mainly due to the highest N harvest index and low grain N concentration, which consequently led to improved NUE. The net profit for T4 was the highest among four treatments and was 174.94, 22.27, and 28.10% higher than that for T1, T2, and T3, respectively. Therefore, the T4 treatment should be a recommendable management strategy to obtain high grain yield, high NUE, and high economic benefits in the target region, although further improvements of NUE are required.展开更多
文摘To enhance the management level and quality of the automobile transportation logistics supply chain and promote innovation and development in automobile transportation logistics enterprises,it is essential to strengthen the construction of the automobile transportation logistics supply chain management model.This can be achieved through the gradual improvement of the automobile transportation logistics management process,ensuring that the management of the automobile transportation logistics supply chain proceeds in an orderly manner.The aim is to improve automobile transportation and logistics service levels while meeting the changing market supply needs.This will enable automobile transportation and logistics enterprises to maintain steady economic benefits and enhance their core competitiveness in the market.Therefore,this paper has conducted a comprehensive exploration and research on managing the automobile transportation logistics supply chain.Corresponding management strategies are proposed as a starting point to achieve the aforementioned goals.
基金financially supported by the Support Plan for Overseas Students to Return to China for Entrepreneurship and Innovation(cx2020003)the Fundamental Research Funds for the Central Universities(2020CDJ-LHZZ-074)the Natural Science Foundation of Chongqing(cstc2020jcyj-msxm X0629)。
文摘The defects from electron transport layer,perovskite layer and their interface would result in carrier nonradiative recombination losses.Poor buried interfacial contact is detrimental to charge extraction and device stability.Here,we report a bottom-up holistic carrier management strategy induced synergistically by multiple chemical bonds to minimize bulk and interfacial energy losses for high-performance perovskite photovoltaics.4-trifluoromethyl-benzamidine hydrochloride(TBHCl)containing–CF_(3),amidine cation and Cl^(-)is in advance incorporated into SnO_(2)colloid solution to realize bottom-up modification.The synergistic effect of multiple functional groups and multiple-bond-induced chemical interaction are revealed theoretically and experimentally.F and Cl^(-)can passivate oxygen vacancy and/or undercoordinated Sn^(4+)defects by coordinating with Sn^(4+).The F can suppress cation migration and modulate crystallization via hydrogen bond with FA^(+),and can passivate lead defects by coordinating with Pb^(2+).The–NH_(2)–C=NH^(+)_(2)and Cl^(-)can passivate cation and anion vacancy defects through ionic bonds with perovskites,respectively.Through TBHCl modification,the suppression of agglomeration of SnO_(2)nanoparticles,bulk and interfacial defect passivation,and release of tensile strains of perovskite films are demonstrated,which resulted in a PCE enhancement from 21.28%to 23.40%and improved stability.With post-treatment,the efficiency is further improved to 23.63%.
基金National Natural Science Foundation of China(Nos.61772130 and 62072096)Fundamental Research Funds for the Central Universities+2 种基金China(No.2232020A-12)International Cooperation Program of Shanghai Science and Technology Commission,China(No.20220713000)Young Top-Notch Talent Program in Shanghai,China。
文摘The promotion of electric vehicles(EVs)is restricted due to their short cruising range.It is desirable to design an effective energy management strategy to improve their energy efficiency.Most existing work concerning energy management strategies focused on hybrids rather than the EVs.The work focusing on the energy management strategy for EVs mainly uses the traditional optimization strategies,thereby limiting the advantages of energy economy.To this end,a novel energy management strategy that considered the impact of battery thermal effects was proposed with the help of reinforcement learning.The main idea was to first analyze the energy flow path of EVs,further formulize the energy management as an optimization problem,and finally propose an online strategy based on reinforcement learning to obtain the optimal strategy.Additionally,extensive simulation results have demonstrated that our strategy reduces energy consumption by at least 27.4%compared to the existing methods.
文摘The safety management of urban railway engineering construction involves many different aspects and a wide scope,playing an important role in guaranteeing the safety of construction projects.Management agencies have more stringent requirements on the quality of railway construction.The overall quality of a construction project should meet the construction requirements before the project can be carried out.In this article,the problems in the actual work of the entire life cycle of safety management are explained,and the lessons and experience pertaining to the safety and quality of urban railway construction projects are discussed.The purpose of this paper is to provide references for the management of urban railway construction.
基金This work was supported by the National Natural Science Foundation of China(GrantNos.81170279,81370408,81370409)the Social Development Projects of Jiangsu Province(WS074,LJ201116,Q201308)the Projects from Social Development of Zhenjiang(SS2012002,SH2013023,SH2013024).
文摘Purpose:To compare the effectiveness of the interventional limb raising management strategy(ILRMS)to elastic bandage compression at radial vascular access sites following coronary angiographies(CAGs)and percutaneous coronary interventions(PCIs).Methods:Patients with ischemic coronary heart disease whose condition was stable over three months were enrolled in this clinical study(n=590;aged 25e80).All participants had just undergone CAG and PCI.Patients were randomized into either the ILRMS group(n=360)or standard post-intervention care with an elastic bandage(n=230).Overall comfort and wrist pain was assessed and the degree of index finger swelling and oxygen saturation was measured on the affected arm.All variables were measured prior to postintervention treatment and again at six hours after CAG and PCI.Results:We found that patients receiving ILRMS had significantly lower wrist pain scores and swelling around the index finger compared to the elastic bandage group(p<0.05).Oxygen saturation of the index finger was not statistically significant(p>0.05).We also found that 19.57%of the elastic bandage patients were comfortable,while ILRMS patients were significantly more comfortable(93.06%;p<0.05).Conclusions:We find that ILRMS alleviates swelling and pain of the wrist more effectively than current practices and improves the degree of overall comfort of patients who undergo CAG and PCI.
文摘In this paper, a plug-in hybrid electrical vehicle(PHEV) is taken as the research object, and its dynamic performance and economic performance are taken as the research goals. Battery charge-sustaining(CS) period is divided into power mode and economy mode. Energy management strategy designing methods of power mode and economy mode are proposed. Maximum velocity, acceleration performance and fuel consumption are simulated during the CS period in the AVL CRUISE simulation environment. The simulation results indicate that the maximum velocity and acceleration time of the power mode are better than those in the economy mode. Fuel consumption of the economy mode is better than that in the power mode. Fuel consumption of PHEV during the CS period is further improved by using the methods proposed in this paper, and this is meaningful for research and development of PHEV.
基金This work was supported by National Natural Science Foundation of China under Project 51325701,51377030,and 51407042.
文摘The flux-modulated compound-structure permanent magnet synchronous machine (CS-PMSM), composed of a brushless double rotor machine (DRM) and a conventional permanent magnet synchronous machine (PMSM), is a power split device for plug-in hybrid electric vehicles. In this paper, its operating principle and mathematical model are introduced. A modified current controller with decoupled state feedback is proposed and verified. The system control strategy is simulated in Matlab, and the feasibility of the control system is proven. To improve fuel economy, an energy management strategy based on fuzzy logic controller is proposed and evaluated by the Urban Dynamometer Driving Schedule (UDDS) drive cycle. The results show that the total energy consumption is similar to that of Prius 2012.
文摘In order to improve the management strategy for personnel files in colleges and universities,simplify the complex process of file management,and improve file management security and content preservation of the files.This paper elaborates on the application of Artificial Intelligence(AI)technology in university personnel file management through theoretical analysis based on the understanding of Al technology.
基金supported by the National Natural Science Foundation(Nos.51977181,52077180,52007157)Fok Ying-Tong Education Foundation of China(No.171104).
文摘This paper proposes an energy management strategy for a fuel cell(FC)hybrid power system based on dynamic programming and state machine strategy,which takes into account the durability of the FC and the hydrogen consumption of the system.The strategy first uses the principle of dynamic programming to solve the optimal power distribution between the FC and supercapacitor(SC),and then uses the optimization results of dynamic programming to update the threshold values in each state of the finite state machine to realize real-time management of the output power of the FC and SC.An FC/SC hybrid tramway simulation platform is established based on RTLAB real-time simulator.The compared results verify that the proposed EMS can improve the durability of the FC,increase its working time in the high-efficiency range,effectively reduce the hydrogen consumption,and keep the state of charge in an ideal range.
文摘WCDMA Radio Resource Management (RRM) controls the allocation and usage of all radio resources. The purpose of RRM is to have optimal coverage and capacity while ensuring the QoS. RRM directly affects the system performance. As the soul of system control, it includes power control, handoff control, load control, admission control, code allocation, etc. This paper introduces the RRM strategy of ZTE’s WCDMA equipment.
文摘The total area of grassland in the world is about 50 million km^2, accounting for 33.5% of the total land area (Lieth, 1975). The permanent grassland used by mankind is 33.04 million km^2, accounting for 25.3% of the total land area (FAO,1990). Grassland can provide feed for herbivore and produce high-quality food,clothing,medicines and industrial materials for man.On the other hand,it also plays an important role in the fertility of the soil,the conservation of water, the improvement of the environment and maintaining the ecological balance of the Earth’s surface.
文摘Lateral violence is not uncommon in workplaces.Unfortunately,nursing,a profession that builds its practice on compassion and code of ethics while caring for their patients is not spared from this phenomenon of lateral violence.Studies have reported cases of lateral violence among nurses to occur frequently worldwide.The impact of lateral violence has serious repercussions not only on the health of bullied victims but also on the structure and financial spending of the organisation.More importantly,the potential latent impacts on the patients'safety and health is of great concern.This literature review suggests that the contributing factors towards lateral violence are mainly due to characteristics of perpetrators,victims'reaction to bullying and organisation's characteristic.To mitigate the impact of lateral violence among young and inexperienced nurses,a cognitive rehearsal scripted response is proposed to prevent harassment and bullying incidents from becoming a feature at the workplace for nurses.
文摘The effects of retarding resistance evolution of mixing and sequencing acaricides were studied based on the resistance selection of three acaricides to Tetranychus cinnabarinus in the laboratory.Tetranychus was continuously selected with fenpropathrin,abamectin and pyridaban for 28,30 and 31 generations,respectively,and resistance factor increased tp 65.6,7.2and 1.2 time,accordingly.Results of cross-resistance determination suggested that there were no cross-resistance existed among the three acaricides.Analysis of resisance selection and estimation of realized heritability(h^2)or resistance to three single and two mixed acaricides showed that a mixture of fenpropathrin+ abamectin would slow resistance development compared with a sequence of renpropathrin followed by abamectin while the mixture of pyridaben+abamectin and the sequence of pyridaben followed by abamectin would effectively retard resistance evolution.
基金Shanghai Municipal Science and Technology Commission, China (No. 033012017).
文摘A novel parallel hybrid electrical urban bus (PHEUB) configuration consisting of an extra one-way clutch and an automatic mechanical transmission (AMT) is taken as the study subject. An energy management strategy combining a logic threshold approach and an instantaneous optimization algorithm is proposed for the investigated PHEUB. The objective of the energy management strategy is to achieve acceptable vehicle performance and drivability requirements while simultaneously maximizing the engine fuel consumption and maintaining the battery state of charge in its operation range at all times. Under the environment of Matlab/Simulink, a computer simulation model for the PHEUB is constructed by using the model building method combining theoretical analysis and bench test data. Simulation and experiment results for China Typical Bus Driving Schedule at Urban District (CTBDS_UD) are obtained, and the results indicate that the proposed control strategy not only controls the hybrid system efficiently but also improves the fuel economy significantly.
文摘The hospital environment in Japan has changed drastically lately. Its unpredictability has increased the need for hospitals to select management strategies to clarify their course. However, research on Japanese hospitals’ management strategies has only recently begun with too few studies in this area. Hence, this study clarifies the management strategies of Japanese private hospitals. It explores the hospital characteristics that affect strategy selection. A questionnaire was mailed to 5682 private medical institutions in 2013, and 459 responses with no missing data were used for analysis. Factor analysis yielded four factors: “bed conversion and downsizing (Factor 1),” “diversification of medical and nursing care (Factor 2),” “expansion in business scale (Factor 3),” and “expansion of income from non-insured medical care (Factor 4)”. Logistic regression analysis revealed that Year Founded (before 1965), Hospital Location (municipalities with populations smaller than 100,000), Hospital Type (psychiatric hospitals and mixed-care hospital), and Hospital Income and Expenditure (deficit) had significant positive impacts on the choice of Factor 1. For Factor 2, Hospital Type (sanatorium ward and mixed-care hospitals) and Hospital Income and Expenditure (constant surplus) had positive impacts. For Factor 3, Hospital Type (general hospital) and Bed Counts (more than 200) had positive impacts. For Factor4, Hospital Type (general hospital) had positive impacts. In other words, older hospitals, hospitals in rural areas, psychiatric hospitals, mixed-care hospitals, and hospitals with deficits tended to choose bed conversion and downsizing. Sanatorium ward hospitals, mixed-care hospitals, and hospitals with a constant surplus tended to choose diversification of medical and nursing care. General hospitals and large hospitals tended to choose expansion in scale, and general hospitals tended to choose expansion into non-insured medical care. The planning of mid- to long-term management strategies suitable for each hospital and their steady execution are required.
文摘According to overall mean square root of weighted deviation, presented an evaluation model of geology-technique-social conditions with a significant index system for the estimation of operating quality in productive coal mines. In the given example, the evaluation result is used to decide management strategy of coal mine, which plays a guiding role in the production.
基金funded by the Norwegian Research Council as part of project no.267982/E50 Grazing resources,carnivores and local communities(Local Carnivore)
文摘Increasing populations of large carnivores are leading to tension and conflicts with livestock production,a situation that potentially might escalate.In Norway the objective of the large carnivore policy is two-folded:to ensure viable carnivore populations and to secure a sustainable grazing industry.The main instrument is zonation,with carnivore management zones(CMZs)prioritized for reproduction of the large carnivore species separated from other areas prioritized for grazing livestock.The objective of this paper is to describe current knowledge about the impact of the zoning management strategy on the grazing industry.This is done by documenting status and changes in sheep production,losses of livestock to predating carnivores,and the use of grazing areas inside and outside the CMZs.CMZsoffering protection for lynx,wolverine,bear and wolf cover 55%of the Norwegian mainland.30%of the sheep and 50%of the Sami reindeer grazing areas are found inside the CMZs.Livestock(semi-domestic reindeer excluded)is using 59%of the available natural pasture areas outside the CMZs,but only 26%inside the CMZs.The lowest use of available grazing areas was found inside zones for wolves(12%)and brown bears(6%).Livestock in these zones are confined to fenced enclosures,mostly on the farm itself,or moved to pastures outside the management zone for summer grazing.Livestock losses increased in the affected regions during the period when carnivores were reestablished.Later,losses declined when CMZs were established and mitigation efforts were implemented in these zones.The bulk of sheep and reindeer killed by carnivores are now found in boundary areas within 50 km off the CMZs,where sheep are still grazing on open mountain and forest ranges.Therefore,instruments to protect livestock in areas close to the CMZs are also needed.The number of sheep declined inside the CMZs from 1999 to 2014,but increased outside the zones.The reduction in the absolute number of sheep in the CMZs is balanced by a similar increase outside,thus the total sheep production in Norway is maintained.We conclude that although of little consequence for the total food production in Norway,the economic and social impact of the large carnivore management strategy can be serious for local communities and individual farmers who are affected.There is a need for more exact carnivore population monitoring to quantify the carnivore pressure,better documentation of reindeer losses,and a clearer and stricter practicing of the zoning strategy.Increased involvement of social sciences is important in order to understand the human dimension of the carnivore conflicts.
基金This project is supported by Electric Vehicle Key Project of National 863 Program of China (No.2001AA501200, 2001AA501211).
文摘Energy management strategy (EMS) is the core of the real-time control algorithm of the hybrid electric vehicle (HEV). A novel EMS using the logic threshold approach with incorporation of a stand-by optimization algorithm is proposed. The aim of it is to minimize the engine fuel consumption and maintain the battery state of charge (SOC) in its operation range, while satisfying the vehicle performance and drivability requirements. The hybrid powertrain bench test is carried out to collect data of the engine, motor and battery pack, which are used in the EMS to control the powertrain. Computer simulation model of the HEV is established in the MATLAB/Simulink environment according to the bench test results. Simulation results are presented for behaviors of the engine, motor and battery. The proposed EMS is implemented for a real parallel hybrid car control system and validated by vehicle field tests.
文摘There are many patients in the blood purification center who need maintenance hemodialysis to maintain life. Those patients generally havelow resistance and are easily exposed to coronavirus because they go back and forth the hospital and residence three times a week andclosely contact with family, caregivers, community personnel, people in various means of transportation, medical staff, and other patientsvisiting hospital. Therefore, the blood purification center has become a high‑risk environment for the spread of COVID-19 infection. In viewof this, our center quickly responded to the formulation and implementation of infection prevention and control measures suitable for thecharacteristics of the blood purification center and continuous renal replacement therapy (CRRT) emergency plan for fever and suspectedpatients. According to these measures, we have a positive effect on preventing and controlling nosocomial infection in the blood purificationcenter.
基金supported by the National Basic Research Program of China (2015CB150404)the Special Fund for Agro-scientific Research in the Public Interest, China (201203096)the Project of Shandong Province Higher Educational Science and Technology Program, China (J15LF07)
文摘Understanding of how combinations of agronomic options can be used to improve the grain yield and nitrogen use efficiency(NUE) of winter wheat is limited. A three-year experiment involving four integrated management strategies was conducted from 2013 to 2015 in Tai'an, Shandong Province, China, to evaluate changes in grain yield and NUE. The integrated management treatments were as follows: current practice(T1); improvement of current practice(T2); high-yield management(T3), which aimed to maximize grain yield regardless of the cost of resource inputs; and integrated soil and crop system management(T4) with a higher seeding rate, delayed sowing date, and optimized nutrient management. Seeding rates increased by 75 seeds m^(–2) with each treatment from T1(225 seeds m^(–2)) to T4(450 seeds m^(–2)). The sowing dates were delayed from T1(5 th Oct.) to T2 and T3(8 th Oct.), and to T4 treatment(12 th Oct.). T1, T2, T3, and T4 received 315, 210, 315, and 240 kg N ha^(–1), 120, 90, 210 and 120 kg P_2O_5 ha^(–1), 30, 75, 90, and 45 kg K_2O ha^(–1), respectively. The ratio of basal application to topdressing for T1, T2, T3, and T4 was 6:4, 5:5, 4:6, and 4:6, respectively, with the N topdressing applied at regreening for T1 and at jointing stage for T2, T3, and T4. The P fertilizers in all treatments were applied as basal fertilizer. The K fertilizer for T1 and T2 was applied as basal fertilizer while the ratio of basal application to topdressing(at jointing stage) of K fertilizer for both T3 and T4 was 6:4. T1, T2, T3, and T4 were irrigated five, four, four and three times, respectively. Treatment T3 produced the highest grain yield among all treatments over three years and the average yield was 9 277.96 kg ha^(–1). Grain yield averaged across three years with the T4 treatment(8 892.93 kg ha^(–1)) was 95.85% of that with T3 and was 21.72 and 6.10% higher than that with T1(7 305.95 kg ha^(–1)) and T2(8 381.41 kg ha^(–1)), respectively. Treatment T2 produced the highest NUE of all the integrated treatments. The NUE with T4 was 95.36% of that with T2 and was 51.91 and 25.62% higher than that with T1 and T3, respectively. The N uptake efficiency(UPE) averaged across three years with T4 was 50.75 and 16.62% higher than that with T1and T3, respectively. The N utilization efficiency(UTE) averaged across three years with T4 was 7.74% higher than that with T3. The increased UPE with T4 compared with T3 could be attributed mostly to the lower available N in T4, while the increased UTE with T4 was mainly due to the highest N harvest index and low grain N concentration, which consequently led to improved NUE. The net profit for T4 was the highest among four treatments and was 174.94, 22.27, and 28.10% higher than that for T1, T2, and T3, respectively. Therefore, the T4 treatment should be a recommendable management strategy to obtain high grain yield, high NUE, and high economic benefits in the target region, although further improvements of NUE are required.
