Many networks in the real world have spatial attributes, such as location of nodes and length of edges, called spatial networks. When these networks are subject to some random or deliberate attacks, some nodes in the ...Many networks in the real world have spatial attributes, such as location of nodes and length of edges, called spatial networks. When these networks are subject to some random or deliberate attacks, some nodes in the network fail, which causes a decline in the network performance. In order to make the network run normally, some of the failed nodes must be recovered. In the case of limited recovery resources, an effective key node identification method can find the key recovering node in the failed nodes, by which the network performance can be recovered most of the failed nodes. We propose two key recovering node identification methods for spatial networks, which are the Euclidean-distance recovery method and the route-length recovery method. Simulations on homogeneous and heterogeneous spatial networks show that the proposed methods can significantly recover the network performance.展开更多
Dear Editor,We reported a case of a multidisciplinary therapy for late recovered facial paralysis 2y after the initial diagnosis.Facial paralysis has an incidence of 20-30 people out of 100000 per year,and up to 1 in ...Dear Editor,We reported a case of a multidisciplinary therapy for late recovered facial paralysis 2y after the initial diagnosis.Facial paralysis has an incidence of 20-30 people out of 100000 per year,and up to 1 in 60 people will be affected during their life time[1].展开更多
The system translates the arm/boom/buck's potential energy into electrical energy and then the electrical energy is stored in a storage device.This study develops a set of energy management strategy to make the re...The system translates the arm/boom/buck's potential energy into electrical energy and then the electrical energy is stored in a storage device.This study develops a set of energy management strategy to make the recoverable energy recycling efficiently.This energy of traditional excavator is lost in the form of heat energy,which is wasteful,and makes the component's temperature higher and higher to reduce the machine's life.Research on this system not only conforms to the current topic of energy crisis,but also mates with the actual engineering,so it is significant to research that.展开更多
Objective:Studies have shown that docosahexaenoic acid(DHA)has a beneficial effect in the treatment of spinal cord injury.A meta-analysis was used to study the effect of DHA on the neurological recovery in the rat spi...Objective:Studies have shown that docosahexaenoic acid(DHA)has a beneficial effect in the treatment of spinal cord injury.A meta-analysis was used to study the effect of DHA on the neurological recovery in the rat spinal cord injury model,and the relationship between the recovery of motor function after spinal cord injury and the time and method of administration and the dose of DHA.Data source:Published studies on the effect of DHA on spinal cord injury animal models from seven databases were searched from their inception to January 2019,including PubMed,MEDLINE,EMBASE,the China National Knowledge Infrastructure,Wanfang,VIP,and SinoMed databases.The search terms included“spinal cord injury”“docosahexaenoic acid”,and“rats”.Data selection:Studies that evaluated the influence of DHA in rat models of spinal cord injury for locomotor functional recovery were included.The intervention group included any form of DHA treatment and the control group included treatment with normal saline,vehicle solution or no treatment.The Systematic Review Centre for Laboratory animal Experimentation’s risk of bias assessment tool was used for the quality assessment of the included studies.Literature inclusion,quality evaluation and data extraction were performed by two researchers.Meta-analysis was then conducted on all studies that met the inclusion criteria.Statistical analysis was performed on the data using RevMan 5.1.2.software.Outcome measures:The primary outcome measure was the score on the Basso,Beattie,and Bresnahan scale.Secondary outcome measures were the sloping plate test,balance beam test,stair test and grid exploration test.Results:A total of 12 related studies were included,3 of which were of higher quality and the remaining 9 were of lower quality.The highest mean Basso,Beattie,and Bresnahan scale score occurred at 42 days after DHA treatment in spinal cord injury rats.At 21 days after treatment,the mean difference in Basso,Beattie,Bresnahan scores between the DHA group and the control group was the most significant(pooled MD=4.14;95%CI=3.58–4.70;P<0.00001).In the subgroup analysis,improvement in the Basso,Beattie,and Bresnahan scale score was more significant in rats administered DHA intravenously(pooled MD=2.74;95%CI=1.41–4.07;P<0.0001)and subcutaneously(pooled MD=2.99;95%CI=2.29–3.69;P<0.00001)than in the groups administered DHA orally(pooled MD=3.04;95%CI=–1.01 to 7.09;P=0.14).Intravenous injection of DHA at 250 nmol/kg(pooled MD=2.94;95%CI=2.47–3.41;P<0.00001]and 1000 nmol/kg[pooled MD=3.60;95%CI=2.66–4.54;P<0.00001)significantly improved the Basso,Beattie,and Bresnahan scale score in rats and promoted the recovery of motor function.Conclusion:DHA can promote motor functional recovery after spinal cord injury in rats.The administration of DHA by intravenous or subcutaneous injection is more effective than oral administration of DHA.Intravenous injection of DHA at doses of 250 nmol/kg or 1000 nmol/kg is beneficial.Because of the small number and the low quality of the included studies,more high-quality research is needed in future to substantiate the results.展开更多
Pig farmers’willingness to recover production under the COVID-19 pandemic shock is significant to recover live pigs’supply in China in 2020.Increasing farmers’willingness to recover pig production contributes to en...Pig farmers’willingness to recover production under the COVID-19 pandemic shock is significant to recover live pigs’supply in China in 2020.Increasing farmers’willingness to recover pig production contributes to enhance pig supply,stabilize the pig and pork market,and to improve pig farmers’income.This research studies the determinants of pig farmers’willingness to recover production under COVID-19 pandemic shock by applying survey data of 201 farmers in Huai’an City and Lin’an City and a logit regression model.The estimation results show that a farmer’s risk perception,the duration time of a farmer’s feed supply under COVID-19 pandemic shock,whether or not being a cooperative member,and a farmer’s knowledge on government’s policy designed to encourage pig production,a farmer’s education level and production experience are the key determinants to a farmer’s willingness to recover pig production.Thus,it’s important for policymakers to solve the problems for farmers to get access to feed during the pandemic,to encourage the development of cooperatives,as well as to issue and advocate policies to encourage pig production.The study contributes to the scant literature by providing fresh empirical evidences on determinants of farmers’willingness to recover pig production.It has significance to farmers and governments to enhance farmers’willingness to recover production,which contributes to secure pig supply in China after the COVID-19 pandemic.展开更多
As a significant inducement during the development of oil and gas,the role of remaining recoverable reserves is more observable especially in the later phase of development of oilfield.Depended on the production decli...As a significant inducement during the development of oil and gas,the role of remaining recoverable reserves is more observable especially in the later phase of development of oilfield.Depended on the production decline method in petroleum reservoir engineering,a new model of predicting recoverable and remaining recoverable reserves has been展开更多
Based on experimental study of the time dependence of the recoverable shape memory effect(SME)of shape memory alloys Ti50Ni50,Ti50Ni48Cu2 and Ti50Ni45Cu5 an empirical re-lationship between recoverable strain energy,U_...Based on experimental study of the time dependence of the recoverable shape memory effect(SME)of shape memory alloys Ti50Ni50,Ti50Ni48Cu2 and Ti50Ni45Cu5 an empirical re-lationship between recoverable strain energy,U_r,and temperature,T.was derived as:U_r=U_o[1-exp(-mT_R^n)]where m—characteristic constant related to material,and n-shape-temperature sensitivity.The Johnson-Mehl-Aerami’s phenomenological description of the time dependence of phasetransformation was adopted to obtain a semiquantitative relationship associated withrecoverable SME.between thermoelastic martensite transformation and temperature.Thissemiquantitative relationship is correspondent with the empirical expression.展开更多
The dual argument is well known for recoving the optimal L<sub>2</sub>-error of the finite element method in elliptic context. This argument, however, will lose efficacy in hyperbolic case. An expansion ar...The dual argument is well known for recoving the optimal L<sub>2</sub>-error of the finite element method in elliptic context. This argument, however, will lose efficacy in hyperbolic case. An expansion argument and an approximation argument are presented in this paper to recover the optimal L<sub>2</sub>-error of finite element methods for hyperbolic problems. In particular, a second order error estimate in L<sub>2</sub>-norm for the standard linear finite element method of hyperbolic problems is obtained if the exact solution is smooth and the finite element mesh is almost uniform, and some superconvergence estimates are also established for leas smooth solution.展开更多
An mvestigation and analysis of 229 deal-mute children revealed that 54.2％ of ac-quired deafness were mused by ototoxic aminoglycoside drugs.There is an upward trend of the oc-cunence of the disease in the recent yea...An mvestigation and analysis of 229 deal-mute children revealed that 54.2％ of ac-quired deafness were mused by ototoxic aminoglycoside drugs.There is an upward trend of the oc-cunence of the disease in the recent years and more attention should be paid to it.The result ofpure tone audiometry showed that more than 90.4％ of deaf-mute children had some residualhearing.Twenty-six deal-mute children whose average hearing thresholds of speech frequency werebetter them 90dB(HL)had serviceable speech for daily use 3 after 3 to 18 months’ speech Warn-ing,and 4 of them were transferred to ordinary primary schools.The authors are of the opinionthat the deaf-mute children should use heating-aids as early as possible so as to promote theirspeech.展开更多
SJ-10 is a recoverable scientific experiment satellite specially for the space experiments of microgravity physics science and space life science.This mission was officially started on 31 December 2012,and the satelli...SJ-10 is a recoverable scientific experiment satellite specially for the space experiments of microgravity physics science and space life science.This mission was officially started on 31 December 2012,and the satellite was launched on 6 April 2016.This paper introduces briefly the SJ-10 mission,the progress of SJ-10 engineering and the project constitution of sciences experiments onboard SJ-10.The purpose of this mission is to discover the law of matter movement and the rule of life activity that cannot be discovered on the ground due to the existence of gravity,and to know the acting mechanism on organisms by the complex radiation of space that cannot be simulated on the ground.展开更多
在平时使用电脑的过程中,最让用户头痛的莫过于重要数据的丢失,"挽救"丢失的文件就变得很急迫.Iolo作为老牌工具软件开发商,出品的Search And Recover(以下简称SAR)是恢复软件中的精品.SAR的界面简洁(如图1),功能强大.支持从...在平时使用电脑的过程中,最让用户头痛的莫过于重要数据的丢失,"挽救"丢失的文件就变得很急迫.Iolo作为老牌工具软件开发商,出品的Search And Recover(以下简称SAR)是恢复软件中的精品.SAR的界面简洁(如图1),功能强大.支持从磁盘、移动存储器、MP3播放器、数字相机等介质恢复文件,提供恢复前预览,支持邮件恢复,映象磁盘等实用功能.SAR提供了向导模式和高级恢复模式,使用户轻松恢复丢失的文件.展开更多
This paper targets the shale oil reservoirs of middle to high maturity in four major basins of China,including the Permian Lucaogou Formation of the Jimsar Sag in the Junggar Basin,the Chang 73 Member of the Triassic ...This paper targets the shale oil reservoirs of middle to high maturity in four major basins of China,including the Permian Lucaogou Formation of the Jimsar Sag in the Junggar Basin,the Chang 73 Member of the Triassic Yanchang Formation in the Longdong area of the Ordos Basin,the Kong 2 Member of the Paleogene Kongdian Formation in Cangdong Sag of the Bohai Bay Basin,and the Qing 1 Member of the Cretaceous Qingshankou Formation in Changling Sag of the Songliao Basin.The key parameters of the shale oil reservoirs in the four basins,such as reservoirs effectiveness,oil content,crude oil movability,and fracability,have been revealed under identical experimental conditions using the same evaluation technical system,on the basis of technique development and integrated application of multi-scale spatial distribution depiction,effective connectivity calculation,movable oil assessment based on the charging effect,and simulation of fracture propagation during reservoir stimulation.This research overcomes insufficient resolutions of conventional analysis approaches and difficulties in quantitative evaluation,develops the evaluation method for resource recoverability of different types of shale oil,and gains insights into different types of shale oil via comparison.The results of experiments and comparative analysis show that there are significant differences in the endowment of continental shale oil resources in the four major basins in China.Among them,the Lucaogou Formation in the Junggar Basin has more effective shale reservoirs,the Chang 73 sub-member of the Ordos Basin has a comparatively good proportion of movable oil and the Kong 2 Member of the Bohai Bay Basin has the best fracability.These results can provide references and basis for choosing development plans and engineering techniques.展开更多
Background: A large number of studies have addressed whiplash injury, and many meta-analyses have sought to highlight chronicity factors;the implicated processes, however, remain a matter of debate. The present study ...Background: A large number of studies have addressed whiplash injury, and many meta-analyses have sought to highlight chronicity factors;the implicated processes, however, remain a matter of debate. The present study used data from the ESPARR cohort (an on-going prospective study of a representative cohort of road accident victims in the Rh?ne administrative département of France). The objectives were to describe the consequences of whiplash injury and to determine prognostic factors for poor recovery and persistent pain at 1 year post-accident. Methods: The cohort included 255 “pure” whiplash victims, 173 of whom responded to the 1-year follow-up questionnaire. Correlations between explanatory variables and health and pain status were explored by modified Poisson regression to provide adjusted relative risk (RR) values. Results: Half of the victims had not fully recovered health status by 1 year. The main factor associated with non-recovery was pain (RR = 1.3;1.0-1.7). A birth in the family preceding the accident emerged as another factor (RR=1.5;1.2-1.9). Victims responsible for their accident were twice as likely to report being free of pain as those not responsible (RR = 0.5;0.3-0.8). No correlation emerged with accident-related characteristics or PTSD. Conclusions: The present results extend our understand- ing of whiplash injury. Residual pain is the fundamental factor causing whiplash victims to feel that they have not recovered good health. Our findings suggest this may be bound up with physical factors (gender susceptibility);external factors such as having to carry weights (such as a baby) and with perceiving oneself as a victim are not incompatible with this hypothesis.展开更多
China’s foreign trade from January to May According to Customs figures,China’s total import and export value from January to May reached 9.16trillion yuan,down 3.2%year on year(the same below).In terms of the U.S.do...China’s foreign trade from January to May According to Customs figures,China’s total import and export value from January to May reached 9.16trillion yuan,down 3.2%year on year(the same below).In terms of the U.S.dollar,the total import and export value for the first five months reached$1.14trillion,down 8.6%.In May alone,the total import and export value was$2.02 trillion,up 2.8%.Among which,展开更多
In 1993, the Shanghai Municipal Government put forward a plan to resume the financial function of the Shanghai Bund which was called "the Far-East Wall Street" in the past. It evoked repercussions all over t...In 1993, the Shanghai Municipal Government put forward a plan to resume the financial function of the Shanghai Bund which was called "the Far-East Wall Street" in the past. It evoked repercussions all over the international finance circles. Personnel from the Chinese and foreign financial institutions have come here to make investigation one after another. Those overseas investors formerly engaged in financial business in the Bund think展开更多
基金Project supported by Zhejiang Provincial Natural Science Foundation of China (Grant No. LQ23F030012)the Fundamental Research Funds for the Provincial Universities of Zhejiang (Grant No. GK229909299001-018)。
文摘Many networks in the real world have spatial attributes, such as location of nodes and length of edges, called spatial networks. When these networks are subject to some random or deliberate attacks, some nodes in the network fail, which causes a decline in the network performance. In order to make the network run normally, some of the failed nodes must be recovered. In the case of limited recovery resources, an effective key node identification method can find the key recovering node in the failed nodes, by which the network performance can be recovered most of the failed nodes. We propose two key recovering node identification methods for spatial networks, which are the Euclidean-distance recovery method and the route-length recovery method. Simulations on homogeneous and heterogeneous spatial networks show that the proposed methods can significantly recover the network performance.
基金Supported by the National Natural Science Foundation of China (No.82000938,No.81900906,No.82000857)。
文摘Dear Editor,We reported a case of a multidisciplinary therapy for late recovered facial paralysis 2y after the initial diagnosis.Facial paralysis has an incidence of 20-30 people out of 100000 per year,and up to 1 in 60 people will be affected during their life time[1].
基金supported by Science and Technology Research and Development Plan Project of Handan City(22422401138ZC)2022 School Level Project in Handan University(XZ2022203)。
文摘The system translates the arm/boom/buck's potential energy into electrical energy and then the electrical energy is stored in a storage device.This study develops a set of energy management strategy to make the recoverable energy recycling efficiently.This energy of traditional excavator is lost in the form of heat energy,which is wasteful,and makes the component's temperature higher and higher to reduce the machine's life.Research on this system not only conforms to the current topic of energy crisis,but also mates with the actual engineering,so it is significant to research that.
基金supported by the National Natural Science Foundation of China,No.81704096,81603635,81873317(to MY,JY,XJC)Shanghai Science and Technology Commission-Key Project of Traditional Chinese Medicine,No.16401970100(to YJW)+4 种基金the Shanghai Traditional Chinese Medicine Medical Center of Chronic Disease of China,No.2017ZZ01010(to YJW)the National Thirteenth Five-Year Science and Technology Major Special Project for New Drug Innovation and Development of China,No.2017ZX09304001(to YJW)the Program for Innovative Research Team of Ministry of Science and Technology of China,No.2015RA4002(to YJW)the “Innovation Team” Development Projects of China,No.IRT1270(to YJW)the Three Years Action to Accelerate the Development of Traditional Chinese Medicine Plan of China,No.ZY(2018-2020)-CCCX-3003(to YJW)
文摘Objective:Studies have shown that docosahexaenoic acid(DHA)has a beneficial effect in the treatment of spinal cord injury.A meta-analysis was used to study the effect of DHA on the neurological recovery in the rat spinal cord injury model,and the relationship between the recovery of motor function after spinal cord injury and the time and method of administration and the dose of DHA.Data source:Published studies on the effect of DHA on spinal cord injury animal models from seven databases were searched from their inception to January 2019,including PubMed,MEDLINE,EMBASE,the China National Knowledge Infrastructure,Wanfang,VIP,and SinoMed databases.The search terms included“spinal cord injury”“docosahexaenoic acid”,and“rats”.Data selection:Studies that evaluated the influence of DHA in rat models of spinal cord injury for locomotor functional recovery were included.The intervention group included any form of DHA treatment and the control group included treatment with normal saline,vehicle solution or no treatment.The Systematic Review Centre for Laboratory animal Experimentation’s risk of bias assessment tool was used for the quality assessment of the included studies.Literature inclusion,quality evaluation and data extraction were performed by two researchers.Meta-analysis was then conducted on all studies that met the inclusion criteria.Statistical analysis was performed on the data using RevMan 5.1.2.software.Outcome measures:The primary outcome measure was the score on the Basso,Beattie,and Bresnahan scale.Secondary outcome measures were the sloping plate test,balance beam test,stair test and grid exploration test.Results:A total of 12 related studies were included,3 of which were of higher quality and the remaining 9 were of lower quality.The highest mean Basso,Beattie,and Bresnahan scale score occurred at 42 days after DHA treatment in spinal cord injury rats.At 21 days after treatment,the mean difference in Basso,Beattie,Bresnahan scores between the DHA group and the control group was the most significant(pooled MD=4.14;95%CI=3.58–4.70;P<0.00001).In the subgroup analysis,improvement in the Basso,Beattie,and Bresnahan scale score was more significant in rats administered DHA intravenously(pooled MD=2.74;95%CI=1.41–4.07;P<0.0001)and subcutaneously(pooled MD=2.99;95%CI=2.29–3.69;P<0.00001)than in the groups administered DHA orally(pooled MD=3.04;95%CI=–1.01 to 7.09;P=0.14).Intravenous injection of DHA at 250 nmol/kg(pooled MD=2.94;95%CI=2.47–3.41;P<0.00001]and 1000 nmol/kg[pooled MD=3.60;95%CI=2.66–4.54;P<0.00001)significantly improved the Basso,Beattie,and Bresnahan scale score in rats and promoted the recovery of motor function.Conclusion:DHA can promote motor functional recovery after spinal cord injury in rats.The administration of DHA by intravenous or subcutaneous injection is more effective than oral administration of DHA.Intravenous injection of DHA at doses of 250 nmol/kg or 1000 nmol/kg is beneficial.Because of the small number and the low quality of the included studies,more high-quality research is needed in future to substantiate the results.
基金This study was funded by the National Natural Science Foundation of China(71403243)ZJU-IFPRI International Development Joint Research Center Project(126000-541902).
文摘Pig farmers’willingness to recover production under the COVID-19 pandemic shock is significant to recover live pigs’supply in China in 2020.Increasing farmers’willingness to recover pig production contributes to enhance pig supply,stabilize the pig and pork market,and to improve pig farmers’income.This research studies the determinants of pig farmers’willingness to recover production under COVID-19 pandemic shock by applying survey data of 201 farmers in Huai’an City and Lin’an City and a logit regression model.The estimation results show that a farmer’s risk perception,the duration time of a farmer’s feed supply under COVID-19 pandemic shock,whether or not being a cooperative member,and a farmer’s knowledge on government’s policy designed to encourage pig production,a farmer’s education level and production experience are the key determinants to a farmer’s willingness to recover pig production.Thus,it’s important for policymakers to solve the problems for farmers to get access to feed during the pandemic,to encourage the development of cooperatives,as well as to issue and advocate policies to encourage pig production.The study contributes to the scant literature by providing fresh empirical evidences on determinants of farmers’willingness to recover pig production.It has significance to farmers and governments to enhance farmers’willingness to recover production,which contributes to secure pig supply in China after the COVID-19 pandemic.
文摘As a significant inducement during the development of oil and gas,the role of remaining recoverable reserves is more observable especially in the later phase of development of oilfield.Depended on the production decline method in petroleum reservoir engineering,a new model of predicting recoverable and remaining recoverable reserves has been
文摘Based on experimental study of the time dependence of the recoverable shape memory effect(SME)of shape memory alloys Ti50Ni50,Ti50Ni48Cu2 and Ti50Ni45Cu5 an empirical re-lationship between recoverable strain energy,U_r,and temperature,T.was derived as:U_r=U_o[1-exp(-mT_R^n)]where m—characteristic constant related to material,and n-shape-temperature sensitivity.The Johnson-Mehl-Aerami’s phenomenological description of the time dependence of phasetransformation was adopted to obtain a semiquantitative relationship associated withrecoverable SME.between thermoelastic martensite transformation and temperature.Thissemiquantitative relationship is correspondent with the empirical expression.
文摘The dual argument is well known for recoving the optimal L<sub>2</sub>-error of the finite element method in elliptic context. This argument, however, will lose efficacy in hyperbolic case. An expansion argument and an approximation argument are presented in this paper to recover the optimal L<sub>2</sub>-error of finite element methods for hyperbolic problems. In particular, a second order error estimate in L<sub>2</sub>-norm for the standard linear finite element method of hyperbolic problems is obtained if the exact solution is smooth and the finite element mesh is almost uniform, and some superconvergence estimates are also established for leas smooth solution.
文摘An mvestigation and analysis of 229 deal-mute children revealed that 54.2％ of ac-quired deafness were mused by ototoxic aminoglycoside drugs.There is an upward trend of the oc-cunence of the disease in the recent years and more attention should be paid to it.The result ofpure tone audiometry showed that more than 90.4％ of deaf-mute children had some residualhearing.Twenty-six deal-mute children whose average hearing thresholds of speech frequency werebetter them 90dB(HL)had serviceable speech for daily use 3 after 3 to 18 months’ speech Warn-ing,and 4 of them were transferred to ordinary primary schools.The authors are of the opinionthat the deaf-mute children should use heating-aids as early as possible so as to promote theirspeech.
基金Supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA04020000)United Funding from National Natural Science Foundation of China and Chinese Academy of Sciences。
文摘SJ-10 is a recoverable scientific experiment satellite specially for the space experiments of microgravity physics science and space life science.This mission was officially started on 31 December 2012,and the satellite was launched on 6 April 2016.This paper introduces briefly the SJ-10 mission,the progress of SJ-10 engineering and the project constitution of sciences experiments onboard SJ-10.The purpose of this mission is to discover the law of matter movement and the rule of life activity that cannot be discovered on the ground due to the existence of gravity,and to know the acting mechanism on organisms by the complex radiation of space that cannot be simulated on the ground.
文摘在平时使用电脑的过程中,最让用户头痛的莫过于重要数据的丢失,"挽救"丢失的文件就变得很急迫.Iolo作为老牌工具软件开发商,出品的Search And Recover(以下简称SAR)是恢复软件中的精品.SAR的界面简洁(如图1),功能强大.支持从磁盘、移动存储器、MP3播放器、数字相机等介质恢复文件,提供恢复前预览,支持邮件恢复,映象磁盘等实用功能.SAR提供了向导模式和高级恢复模式,使用户轻松恢复丢失的文件.
基金Supported by the China National Science and Technology Major Project(2016ZX05046)National Key R&D Program(2018YFE0196000)Consulting Research Project of Chinese Academy of Engineering(2019-XZ-61)。
文摘This paper targets the shale oil reservoirs of middle to high maturity in four major basins of China,including the Permian Lucaogou Formation of the Jimsar Sag in the Junggar Basin,the Chang 73 Member of the Triassic Yanchang Formation in the Longdong area of the Ordos Basin,the Kong 2 Member of the Paleogene Kongdian Formation in Cangdong Sag of the Bohai Bay Basin,and the Qing 1 Member of the Cretaceous Qingshankou Formation in Changling Sag of the Songliao Basin.The key parameters of the shale oil reservoirs in the four basins,such as reservoirs effectiveness,oil content,crude oil movability,and fracability,have been revealed under identical experimental conditions using the same evaluation technical system,on the basis of technique development and integrated application of multi-scale spatial distribution depiction,effective connectivity calculation,movable oil assessment based on the charging effect,and simulation of fracture propagation during reservoir stimulation.This research overcomes insufficient resolutions of conventional analysis approaches and difficulties in quantitative evaluation,develops the evaluation method for resource recoverability of different types of shale oil,and gains insights into different types of shale oil via comparison.The results of experiments and comparative analysis show that there are significant differences in the endowment of continental shale oil resources in the four major basins in China.Among them,the Lucaogou Formation in the Junggar Basin has more effective shale reservoirs,the Chang 73 sub-member of the Ordos Basin has a comparatively good proportion of movable oil and the Kong 2 Member of the Bohai Bay Basin has the best fracability.These results can provide references and basis for choosing development plans and engineering techniques.
文摘Background: A large number of studies have addressed whiplash injury, and many meta-analyses have sought to highlight chronicity factors;the implicated processes, however, remain a matter of debate. The present study used data from the ESPARR cohort (an on-going prospective study of a representative cohort of road accident victims in the Rh?ne administrative département of France). The objectives were to describe the consequences of whiplash injury and to determine prognostic factors for poor recovery and persistent pain at 1 year post-accident. Methods: The cohort included 255 “pure” whiplash victims, 173 of whom responded to the 1-year follow-up questionnaire. Correlations between explanatory variables and health and pain status were explored by modified Poisson regression to provide adjusted relative risk (RR) values. Results: Half of the victims had not fully recovered health status by 1 year. The main factor associated with non-recovery was pain (RR = 1.3;1.0-1.7). A birth in the family preceding the accident emerged as another factor (RR=1.5;1.2-1.9). Victims responsible for their accident were twice as likely to report being free of pain as those not responsible (RR = 0.5;0.3-0.8). No correlation emerged with accident-related characteristics or PTSD. Conclusions: The present results extend our understand- ing of whiplash injury. Residual pain is the fundamental factor causing whiplash victims to feel that they have not recovered good health. Our findings suggest this may be bound up with physical factors (gender susceptibility);external factors such as having to carry weights (such as a baby) and with perceiving oneself as a victim are not incompatible with this hypothesis.
文摘China’s foreign trade from January to May According to Customs figures,China’s total import and export value from January to May reached 9.16trillion yuan,down 3.2%year on year(the same below).In terms of the U.S.dollar,the total import and export value for the first five months reached$1.14trillion,down 8.6%.In May alone,the total import and export value was$2.02 trillion,up 2.8%.Among which,
文摘In 1993, the Shanghai Municipal Government put forward a plan to resume the financial function of the Shanghai Bund which was called "the Far-East Wall Street" in the past. It evoked repercussions all over the international finance circles. Personnel from the Chinese and foreign financial institutions have come here to make investigation one after another. Those overseas investors formerly engaged in financial business in the Bund think
