[Objective] To analyze the efficiency of Hunan agro-ecosystem in 1980- 2010. [Method] This paper adopts the emergy methods to evaluate the emergy input and output. [Result] The growth of total emergy input was mainly ...[Objective] To analyze the efficiency of Hunan agro-ecosystem in 1980- 2010. [Method] This paper adopts the emergy methods to evaluate the emergy input and output. [Result] The growth of total emergy input was mainly caused by the auxiliary factors in this phase. The proportion of the nonrenewable purchased emergy input to the total auxiliary emergy input increased from 21.80% in 1980 to 33.04% in 2010. In 1980-2010 the total emergy output of the system increased by 2.43 times, the proportions of the stock farming emergy output and fishery emergy output to the total emergy output increased sharply, while those of the planting emergy output and forestry emergy output showed a considerable decline. [Conclusion] The emergy yield ratio of this system was improved but its sustainability was worrying.展开更多
Xinjiang’s oasis agriculture has made enormous strides over past decades. Structural adjustment of oasis agriculture sector has promoted production diversification. Xinjiang’s oasis agriculture sector is entering a ...Xinjiang’s oasis agriculture has made enormous strides over past decades. Structural adjustment of oasis agriculture sector has promoted production diversification. Xinjiang’s oasis agriculture sector is entering a new era. The era means more adjustments in oasis agricultural and rural economic structure so as to realize the sustainable development of agriculture. By summing and analyzing the main problems in Xinjinag’s oasis agricultural structure, such as raising farmer’s income, industry structure within agriculture, rural urbanization, pressure coming from market, agricultural environment degradation, puts forward the thinking, director and countermeasures to adjust oasis agricultural structure.展开更多
As a unique environmental regulation in China,the official accountability audit was piloted in 2014.With a focus on prioritizing the ecological environment,officials in pilot districts have implemented economic constr...As a unique environmental regulation in China,the official accountability audit was piloted in 2014.With a focus on prioritizing the ecological environment,officials in pilot districts have implemented economic construction,adjusted industrial structures,and promoted coordinated development between the economy and environment.The effects of implementation have garnered widespread attention from society.However,there is limited research on the impact of an accountability audit on industrial structure adjustments.Using the“Accountability Audit of Officials for Natural Resource Assets(Trial)”released in 2015 as a quasi-natural experiment,this study collected panel data from 279 cities between 2013 and 2017.It then empirically analyzed the impact mechanism and effects of the accountability audit on industrial structure adjustment using the Propensity Score Matching and Difference-in-Differences model.The research findings indicate that the accountability audit directly impacted industrial structure adjustment,promoting the upgrading of the primary industry to the secondary industry and restricting the development of the tertiary industry.In addition,the audit is beneficial for enterprise entry,but not conducive to technological innovation,and has no significant impact on foreign direct investment.This conclusion fills a gap in the existing research and provides valuable insights for policymakers.展开更多
We report experimental realization of Raman spectra enhancement of copper phthalocyanine, using an on-chip metallic planar waveguide of the sub-millimeter scale. The oscillating ultrahigh order modes excited by the di...We report experimental realization of Raman spectra enhancement of copper phthalocyanine, using an on-chip metallic planar waveguide of the sub-millimeter scale. The oscillating ultrahigh order modes excited by the direct coupling method yield high optical intensity at resonance, which is different from the conventional strategy to create localized ＂hot spots.＂ The observed excitation efficiency of the Raman signal is significantly enhanced,owing to the high Q factor of the resonant cavity. Furthermore, effective modulation of the Raman intensity is available by adjusting the polymethyl methacrylate（PMMA） thickness in the guiding layer, i.e., by tuning the light–matter interaction length. A large modulation depth is verified through the fact that 10 times variation in the enhancement factor is observed in the experiment as the PMMA thickness varies from 7 to 23 μm.展开更多
China ＇ s economy in 2006 continued to register high growth of l 0. 5 to 10. 7percent with low inflation （CPI at 1.3 percenO, dissipating fears of a hard landing. Since its accession to the WTO, China has become a s...China ＇ s economy in 2006 continued to register high growth of l 0. 5 to 10. 7percent with low inflation （CPI at 1.3 percenO, dissipating fears of a hard landing. Since its accession to the WTO, China has become a significant global economic player, and is the favorite destination for many regional and global production networks. China is now a truly economic power （jingji daguo）. China ＇s economic leadership is also increasingly confident of its ability to manage China ＇s domestic economic growth and its growing relations with the outside world. Although China＇s growth is expected to slow down in 2007 to approximately 9.5 percent, the national mood now is one of ＂more balanced＂ growth rather than ＂＇fast growth ＂. Therefore, the building of a ＂harmonious society＂ is to be emphasized in China, while letting economic growth solve the burning social and environmental issues. In 2007, the government will also need to deal with various internal and external imbalances. The renminbi will be under even stronger pressure to revalue, given China ＂s record trade surplus of US$160bn and foreign reserves of US$1tn.展开更多
The structural adjustment of China＇s economy requires the support of economic theories dedicated to structural issues. But new structural economics （NSE） is significantly different from old structural economics （...The structural adjustment of China＇s economy requires the support of economic theories dedicated to structural issues. But new structural economics （NSE） is significantly different from old structural economics （OSE） in terms of development strategies and policies. They expound on the paths of industrial structure improvement and steady economic growth for developing countries from two different perspectives, comparative advantage and first-mover advantage, which result in a toss-up. From the clashing theories and observations of the true state of Chinese economy, we can see that the core features of China＇s current economic structure are a cumulative result of the insufficient ＂complementary＂ and ＂inducing＂ roles of government investment, which requires the introduction of certain investment models to design an effective structural adjustment plan. From the perspective of investment priority, scope （public service or production）, motives, capacity and decision-making and multi-sectoral coordination, this paper analyzes the key connections between NSE and OSE and strives to design an appropriate and accurate investment plan from the perspective of stability, flexibility and under- pinning in the hope of resolving the issues facing the structural adjustment of the Chinese economy. The first step is to identify investment priorities and enable the market to play the decisive role and the government the guiding role. The second step is to identify crucial nodes and adapt investments to trends of the new industrial revolution. The third step is to focus on the resolution of livelihood issues to steer China out of the low-income trap and clear of the middle-income trap. Not only do investment variables have to become an instrument to continuously improve Chi- na＇s factor endowment structure, but also investment as a mechanism underpinning development has to be adopted throughout the entire duration of the process of reform to fulfill the goal of structural adjustment pursued by both NSE and OSE.展开更多
Based on the analysis of the importance of professional cluster construction by ecological theory,with the change of social demand for talents,this paper explores the practice of environmental chemical professional cl...Based on the analysis of the importance of professional cluster construction by ecological theory,with the change of social demand for talents,this paper explores the practice of environmental chemical professional cluster construction in Pingdingshan University,including gradually perfecting teaching conditions and reforming teaching mode,breaking through the limitations of resources,integrating the boundaries of colleges and departments,integrating multiple resources,innovating systems and mechanisms,reconstructing professional clusters,decon-structing professional connotations,reorganizing curriculum systems,etc.,in order to better build the ecological chain network of education in application-oriented colleges and universities,realize the deep integration of industry and education,train future-oriented interdisciplinary applied talents of new engineering,and realize the construction of characteristic professional cluster in application-oriented colleges.展开更多
Over the past seven decades since the founding of the People's Republic of China in 1949,China's industrial structure has experienced transformations in various stages,which is consistent with the general patt...Over the past seven decades since the founding of the People's Republic of China in 1949,China's industrial structure has experienced transformations in various stages,which is consistent with the general pattern of industrialization and China's domestic and international situations.These changes also have to do with China's reforms in building the socialist market economic system.China's seven-decade industrial structural transformation offers valuable experiences:In promoting its industrial development,China has persistently carried out economic reforms,kept pace with changing factor and demand structures,invested in technology importation and innovation,leveraged global resources and markets,and formulated development policies in line with specific industrial development stages.Despite industrial structural problems,China has set the stage for innovation-driven development,further opening up,and balanced regional development.China's industrial structure will keep evolving amid its transition toward a competitive industrial nation.展开更多
Integrated multimodal imaging in theranostics nanomaterials offers extensive prospects for precise and noninvasive cancer treatment.Precisely controlling the structural evolution of plasmonic nanoparticles is crucial ...Integrated multimodal imaging in theranostics nanomaterials offers extensive prospects for precise and noninvasive cancer treatment.Precisely controlling the structural evolution of plasmonic nanoparticles is crucial in the development of pho-tothermal agents.However,previous successes have been limited to static assemblies and single-component structures.Here,an activatable plasmonic theranostics system utilizing self-assembled 1D silver-coated gold nanochains(1D nanochains)is pre-sented for precise tumor diagnosis and effective treatment.The absorbance of the adaptable core–shell chain structure can shift from visible to near-infrared(NIR)regions due to the fusion between nearby Au@Ag nanoparticles induced by ele-vated H2O2 levels in the tumor microenvironment(TME),resulting in the creation of a novel 3D aggregates with strong NIR absorption.With a high photothermal conversion efficiency of 60.2%at 808 nm,nanochains utilizing the TME-activated characteristics show remarkable qualities for photoacoustic imaging and signifi-cantly limit tumor growth in vivo.This study may pave the way for precise tumor diagnosis and treatment through customizable,optically tunable adaptive plasmonic nanostructures.展开更多
DEA is a nonparametric method used in operation researches and economics fields for the evaluation of the production frontier. It has distinct intrinsic which is worth coping with assessment problems with multiple inp...DEA is a nonparametric method used in operation researches and economics fields for the evaluation of the production frontier. It has distinct intrinsic which is worth coping with assessment problems with multiple inputs in particular with multiple outputs. This paper used D~ C2 R model of DEA to assess the comparative efficiency of the multiple schemes of agricultural industrial structure, at the end we chose the most favorable also known as ＂OPTIMAL＂ scheme. In addition to this, using some functional insights from DEA model non optimal schemes or less optimal schemes had also been improved to some extent. Assessment and selection of optimal schemes of agricultural industrial structure using DEA model gave a greater and better insight of agricultural industrial structure and was the first of such researches in Pakistan.展开更多
DEA is a new research field in operations research. It has unique virtues in dealing with assessment problem with multi-inputs especially multi-outputs. In this paper, DEA model of D?着C2R has been applied to evaluate...DEA is a new research field in operations research. It has unique virtues in dealing with assessment problem with multi-inputs especially multi-outputs. In this paper, DEA model of D?着C2R has been applied to evaluate the relative efficiency of several different schemes of industrial structure adjustment of agriculture and finally select the optimal scheme. Furthermore, the inferior scheme has been improved according to some useful insights got from DEA model.展开更多
This paper used the modern evaluation method of DEA （Data Envelopment Analysis） to assess the comparative efficiency and then on the basis of this among multiple schemes chose the optimal scheme of agricultural prod...This paper used the modern evaluation method of DEA （Data Envelopment Analysis） to assess the comparative efficiency and then on the basis of this among multiple schemes chose the optimal scheme of agricultural production structure adjustment. Based on the results of DEA model, we dissected scale advantages of each discretionary scheme or plan. We examined scale advantages of each discretionary scheme, tested profoundly a definitive purpose behind not-DEA efficient, which elucidated the system and methodology to enhance these discretionary plans. At the end, another method had been proposed to rank and select the optimal scheme. The research was important to guide the practice if the modification of agricultural production industrial structure was carded on.展开更多
in the paper, the advanced assessment method of DEA （Date Envelopment Analysis） had been used to evaluate relative efficiency and select the optimal scheme of agricultural industrial structure adjustment. According ...in the paper, the advanced assessment method of DEA （Date Envelopment Analysis） had been used to evaluate relative efficiency and select the optimal scheme of agricultural industrial structure adjustment. According to the results of DEA models, we analyzed scale benefits of every optional schemes, probed deeply the ultimate reason for not DEA efficient, which clarified the method and approach to improve these optional schemes. Finally, a new method had been proposed to rank and select the optimal scheme. The research is significant to direct the practice of the adjustment of agricultural industrial structure.展开更多
With a vast territory, the space-time distribution of water resources is uneven in China. There is a great dif ference in natural conditions and farmland management of agricuttural production in different regions. The...With a vast territory, the space-time distribution of water resources is uneven in China. There is a great dif ference in natural conditions and farmland management of agricuttural production in different regions. The areal differentiation of agricultural products virtual water is obvious. Comparison with the agricultural products virtual water from 1995 to 2007 in China shows an increase in the first ten vears and a little decrease in recent years. There has been a tendency of increase all the time in Northeast and Northwest. but a decrease after an increase firstly in other regions. The virtual water offood crops is the maximum which accounts for more than 70% in China. and that of vegetables is in a fast growth. The proportion of agricultural products virtual water to the total water resources in each region has a large difference, showing the imbalance of agricultural water in different regions, which accounts for 50%-90% in Northeast, and 125%-185% in North China. Under the guidance of virtual water strategy, based on the differences of resource endowment, each region should adjust agricultural structure, decide production by water, and select water suitable crops. In water-rich region, agricultural produets of high water consumption should be planted appropriately, which will make full use of the abundant local water resources. In water-shortage region the crop production of high water consumption and low efficiency should be depressed, and that of low water consumption and high efficiency should be supported and increased. It will achieve reasonable disposition of water resources, promote ecological restoration and environmental protection, as welt as ensure food security.展开更多
A new type of adjustable nozzle with an annulus clearance between the surfaces of a revolved solid and the matched hole was analyzed, which contained matching parts, regulating parts, guiding elements, and sealing par...A new type of adjustable nozzle with an annulus clearance between the surfaces of a revolved solid and the matched hole was analyzed, which contained matching parts, regulating parts, guiding elements, and sealing part. The general regulating function of the adjustable nozzle was derived and the regulating and matching characteristics were also analyzed. Through the analysis, it was concluded that the matching-profile curve of either the revolved body or matched hole should be chosen as a straight line in order to keep the linear regulating feature. Moreover, the multi-annulus-clearance nozzle was designed, and some experiments were carried out on preparing budesonide particles with the nozzle. According to the experimental results, it was proved that the annulus nozzles is practical in preparing micro-particles by supercritical fluid precipitation method.展开更多
Based on the survey data of 150 peasant households in typical Karst mountainous area in the year 2009, causations, characteristics and influence factors of the concurrent-business behavior of peasant households during...Based on the survey data of 150 peasant households in typical Karst mountainous area in the year 2009, causations, characteristics and influence factors of the concurrent-business behavior of peasant households during planting structure adjustment are analyzed. Result shows that there is significant positive correlation between the concurrent-business income and the household income of farmers. And the concurrent-business behavior has the tendency to be popular among the young farmers with the characteristics of relative concentration, strong will of farmers and the significant impact of education degree on the concurrent-business income. Information, capital, skill, and market awareness are the main factors affecting the concurrent-business behavior of peasant households. Countermeasures to optimize the concurrent-business behavior of peasant households are put forward, such as strengthening the skills training for farmers to improve the cultural quality of peasant households, establishing modern rural financial service system to offer capital support for the development of peasant households, setting up information base of rural labor force to provide more information and channels for the concurrent-business behavior of peasant households, and enhancing the cultivation of farmers' market awareness to improve their ability to adapt to market economy.展开更多
This paper mainly makes a performance evaluation for the industrial structure adjustment of the industrial enterprises, establishing a set of evaluation index system. It uses the mathematics statistics knowledge and m...This paper mainly makes a performance evaluation for the industrial structure adjustment of the industrial enterprises, establishing a set of evaluation index system. It uses the mathematics statistics knowledge and management knowledge to establish a scientific and operable performance evaluation model for the industrial structure adjustment of the industrial enterprises. Based on the model, it can make a performance evaluation for the internal industrial structure adjustment of the industrial enterprises and also it can evaluate the performance of the industrial structure adjustu^ent of different industries.展开更多
Of its total export volume,the proportion of China’s new andhigh technology products and highvalue-added products is extremelylow. Its pure technological exportrate is only 2 percent of the total.Therefore,along with...Of its total export volume,the proportion of China’s new andhigh technology products and highvalue-added products is extremelylow. Its pure technological exportrate is only 2 percent of the total.Therefore,along with thetransformation of the mode ofgrowth of China’s nationaleconomy, a corresponding growthmode transformation should takeplace in its foreign trade sector,and it is necessary to achieve asignificant change in its importand export product mix.展开更多
基金Supported by Hunan Provincial Situation and Decision Consultation Project (2012BZZ16)National Social Science Fund of China(11BJY029)Youth Fund Project of Central South University of Forestry and Technology(2011ZB003)~~
文摘[Objective] To analyze the efficiency of Hunan agro-ecosystem in 1980- 2010. [Method] This paper adopts the emergy methods to evaluate the emergy input and output. [Result] The growth of total emergy input was mainly caused by the auxiliary factors in this phase. The proportion of the nonrenewable purchased emergy input to the total auxiliary emergy input increased from 21.80% in 1980 to 33.04% in 2010. In 1980-2010 the total emergy output of the system increased by 2.43 times, the proportions of the stock farming emergy output and fishery emergy output to the total emergy output increased sharply, while those of the planting emergy output and forestry emergy output showed a considerable decline. [Conclusion] The emergy yield ratio of this system was improved but its sustainability was worrying.
文摘Xinjiang’s oasis agriculture has made enormous strides over past decades. Structural adjustment of oasis agriculture sector has promoted production diversification. Xinjiang’s oasis agriculture sector is entering a new era. The era means more adjustments in oasis agricultural and rural economic structure so as to realize the sustainable development of agriculture. By summing and analyzing the main problems in Xinjinag’s oasis agricultural structure, such as raising farmer’s income, industry structure within agriculture, rural urbanization, pressure coming from market, agricultural environment degradation, puts forward the thinking, director and countermeasures to adjust oasis agricultural structure.
文摘As a unique environmental regulation in China,the official accountability audit was piloted in 2014.With a focus on prioritizing the ecological environment,officials in pilot districts have implemented economic construction,adjusted industrial structures,and promoted coordinated development between the economy and environment.The effects of implementation have garnered widespread attention from society.However,there is limited research on the impact of an accountability audit on industrial structure adjustments.Using the“Accountability Audit of Officials for Natural Resource Assets(Trial)”released in 2015 as a quasi-natural experiment,this study collected panel data from 279 cities between 2013 and 2017.It then empirically analyzed the impact mechanism and effects of the accountability audit on industrial structure adjustment using the Propensity Score Matching and Difference-in-Differences model.The research findings indicate that the accountability audit directly impacted industrial structure adjustment,promoting the upgrading of the primary industry to the secondary industry and restricting the development of the tertiary industry.In addition,the audit is beneficial for enterprise entry,but not conducive to technological innovation,and has no significant impact on foreign direct investment.This conclusion fills a gap in the existing research and provides valuable insights for policymakers.
基金supported by the Natural Science Foundation of Jiangsu Province(Nos.BK20140246 and BK20160417)the National Natural Science Foundation of China(No.61371057,61601251,11404092,and61701261)+1 种基金the China Postdoctoral Science Foundation Funded Project(No.2016M601586)the Fundamental Research Funds for the Central Universities(No.2017B14914)
文摘We report experimental realization of Raman spectra enhancement of copper phthalocyanine, using an on-chip metallic planar waveguide of the sub-millimeter scale. The oscillating ultrahigh order modes excited by the direct coupling method yield high optical intensity at resonance, which is different from the conventional strategy to create localized ＂hot spots.＂ The observed excitation efficiency of the Raman signal is significantly enhanced,owing to the high Q factor of the resonant cavity. Furthermore, effective modulation of the Raman intensity is available by adjusting the polymethyl methacrylate（PMMA） thickness in the guiding layer, i.e., by tuning the light–matter interaction length. A large modulation depth is verified through the fact that 10 times variation in the enhancement factor is observed in the experiment as the PMMA thickness varies from 7 to 23 μm.
文摘China ＇ s economy in 2006 continued to register high growth of l 0. 5 to 10. 7percent with low inflation （CPI at 1.3 percenO, dissipating fears of a hard landing. Since its accession to the WTO, China has become a significant global economic player, and is the favorite destination for many regional and global production networks. China is now a truly economic power （jingji daguo）. China ＇s economic leadership is also increasingly confident of its ability to manage China ＇s domestic economic growth and its growing relations with the outside world. Although China＇s growth is expected to slow down in 2007 to approximately 9.5 percent, the national mood now is one of ＂more balanced＂ growth rather than ＂＇fast growth ＂. Therefore, the building of a ＂harmonious society＂ is to be emphasized in China, while letting economic growth solve the burning social and environmental issues. In 2007, the government will also need to deal with various internal and external imbalances. The renminbi will be under even stronger pressure to revalue, given China ＂s record trade surplus of US$160bn and foreign reserves of US$1tn.
文摘The structural adjustment of China＇s economy requires the support of economic theories dedicated to structural issues. But new structural economics （NSE） is significantly different from old structural economics （OSE） in terms of development strategies and policies. They expound on the paths of industrial structure improvement and steady economic growth for developing countries from two different perspectives, comparative advantage and first-mover advantage, which result in a toss-up. From the clashing theories and observations of the true state of Chinese economy, we can see that the core features of China＇s current economic structure are a cumulative result of the insufficient ＂complementary＂ and ＂inducing＂ roles of government investment, which requires the introduction of certain investment models to design an effective structural adjustment plan. From the perspective of investment priority, scope （public service or production）, motives, capacity and decision-making and multi-sectoral coordination, this paper analyzes the key connections between NSE and OSE and strives to design an appropriate and accurate investment plan from the perspective of stability, flexibility and under- pinning in the hope of resolving the issues facing the structural adjustment of the Chinese economy. The first step is to identify investment priorities and enable the market to play the decisive role and the government the guiding role. The second step is to identify crucial nodes and adapt investments to trends of the new industrial revolution. The third step is to focus on the resolution of livelihood issues to steer China out of the low-income trap and clear of the middle-income trap. Not only do investment variables have to become an instrument to continuously improve Chi- na＇s factor endowment structure, but also investment as a mechanism underpinning development has to be adopted throughout the entire duration of the process of reform to fulfill the goal of structural adjustment pursued by both NSE and OSE.
基金Supported by Education and Teaching Reform Research Project of Pingdingshan University(2021-JY55,2020-JY05)Key Scientifie Research Project of Col-leges and Universities in Henan Province(22B180011)+2 种基金Project of Henan Sci-ence and Technology Department(232102320262)Ideological and Political Theories Teaching in Key Demonstration Courses at School Level in Pingdings-han College in 2022-Comprehensive Experiment of Environmental BiologyIde-ological and Political Theories Teaching in Demonstration Courses at School Level in Pingdingshan College in 2023-Ecological Engineering.
文摘Based on the analysis of the importance of professional cluster construction by ecological theory,with the change of social demand for talents,this paper explores the practice of environmental chemical professional cluster construction in Pingdingshan University,including gradually perfecting teaching conditions and reforming teaching mode,breaking through the limitations of resources,integrating the boundaries of colleges and departments,integrating multiple resources,innovating systems and mechanisms,reconstructing professional clusters,decon-structing professional connotations,reorganizing curriculum systems,etc.,in order to better build the ecological chain network of education in application-oriented colleges and universities,realize the deep integration of industry and education,train future-oriented interdisciplinary applied talents of new engineering,and realize the construction of characteristic professional cluster in application-oriented colleges.
文摘Over the past seven decades since the founding of the People's Republic of China in 1949,China's industrial structure has experienced transformations in various stages,which is consistent with the general pattern of industrialization and China's domestic and international situations.These changes also have to do with China's reforms in building the socialist market economic system.China's seven-decade industrial structural transformation offers valuable experiences:In promoting its industrial development,China has persistently carried out economic reforms,kept pace with changing factor and demand structures,invested in technology importation and innovation,leveraged global resources and markets,and formulated development policies in line with specific industrial development stages.Despite industrial structural problems,China has set the stage for innovation-driven development,further opening up,and balanced regional development.China's industrial structure will keep evolving amid its transition toward a competitive industrial nation.
基金Chinese Academy of Sciences,Grant/Award Number:ZDBS-LY-SLH036CAMS Innovation Fund for Medical Sciences,Grant/Award Number:2023-I2M-3-009+1 种基金Science and Technology Support Program of Jiangsu Province,Grant/Award Number:BZ2022056Ministry of Education-Singapore,Grant/Award Number:Tier 1 A-8000013-00-00。
文摘Integrated multimodal imaging in theranostics nanomaterials offers extensive prospects for precise and noninvasive cancer treatment.Precisely controlling the structural evolution of plasmonic nanoparticles is crucial in the development of pho-tothermal agents.However,previous successes have been limited to static assemblies and single-component structures.Here,an activatable plasmonic theranostics system utilizing self-assembled 1D silver-coated gold nanochains(1D nanochains)is pre-sented for precise tumor diagnosis and effective treatment.The absorbance of the adaptable core–shell chain structure can shift from visible to near-infrared(NIR)regions due to the fusion between nearby Au@Ag nanoparticles induced by ele-vated H2O2 levels in the tumor microenvironment(TME),resulting in the creation of a novel 3D aggregates with strong NIR absorption.With a high photothermal conversion efficiency of 60.2%at 808 nm,nanochains utilizing the TME-activated characteristics show remarkable qualities for photoacoustic imaging and signifi-cantly limit tumor growth in vivo.This study may pave the way for precise tumor diagnosis and treatment through customizable,optically tunable adaptive plasmonic nanostructures.
文摘DEA is a nonparametric method used in operation researches and economics fields for the evaluation of the production frontier. It has distinct intrinsic which is worth coping with assessment problems with multiple inputs in particular with multiple outputs. This paper used D~ C2 R model of DEA to assess the comparative efficiency of the multiple schemes of agricultural industrial structure, at the end we chose the most favorable also known as ＂OPTIMAL＂ scheme. In addition to this, using some functional insights from DEA model non optimal schemes or less optimal schemes had also been improved to some extent. Assessment and selection of optimal schemes of agricultural industrial structure using DEA model gave a greater and better insight of agricultural industrial structure and was the first of such researches in Pakistan.
文摘DEA is a new research field in operations research. It has unique virtues in dealing with assessment problem with multi-inputs especially multi-outputs. In this paper, DEA model of D?着C2R has been applied to evaluate the relative efficiency of several different schemes of industrial structure adjustment of agriculture and finally select the optimal scheme. Furthermore, the inferior scheme has been improved according to some useful insights got from DEA model.
文摘This paper used the modern evaluation method of DEA （Data Envelopment Analysis） to assess the comparative efficiency and then on the basis of this among multiple schemes chose the optimal scheme of agricultural production structure adjustment. Based on the results of DEA model, we dissected scale advantages of each discretionary scheme or plan. We examined scale advantages of each discretionary scheme, tested profoundly a definitive purpose behind not-DEA efficient, which elucidated the system and methodology to enhance these discretionary plans. At the end, another method had been proposed to rank and select the optimal scheme. The research was important to guide the practice if the modification of agricultural production industrial structure was carded on.
基金National Science and Technology Programming (Research and Paradigm of Persisting and High Efficiency Agriculture 2001-DA508-D09-4)
文摘in the paper, the advanced assessment method of DEA （Date Envelopment Analysis） had been used to evaluate relative efficiency and select the optimal scheme of agricultural industrial structure adjustment. According to the results of DEA models, we analyzed scale benefits of every optional schemes, probed deeply the ultimate reason for not DEA efficient, which clarified the method and approach to improve these optional schemes. Finally, a new method had been proposed to rank and select the optimal scheme. The research is significant to direct the practice of the adjustment of agricultural industrial structure.
基金supported by National Natural Science Foundation of China (Grant No. 40471034)Social Sciences Project of Educational Commission of Jilin Province
文摘With a vast territory, the space-time distribution of water resources is uneven in China. There is a great dif ference in natural conditions and farmland management of agricuttural production in different regions. The areal differentiation of agricultural products virtual water is obvious. Comparison with the agricultural products virtual water from 1995 to 2007 in China shows an increase in the first ten vears and a little decrease in recent years. There has been a tendency of increase all the time in Northeast and Northwest. but a decrease after an increase firstly in other regions. The virtual water offood crops is the maximum which accounts for more than 70% in China. and that of vegetables is in a fast growth. The proportion of agricultural products virtual water to the total water resources in each region has a large difference, showing the imbalance of agricultural water in different regions, which accounts for 50%-90% in Northeast, and 125%-185% in North China. Under the guidance of virtual water strategy, based on the differences of resource endowment, each region should adjust agricultural structure, decide production by water, and select water suitable crops. In water-rich region, agricultural produets of high water consumption should be planted appropriately, which will make full use of the abundant local water resources. In water-shortage region the crop production of high water consumption and low efficiency should be depressed, and that of low water consumption and high efficiency should be supported and increased. It will achieve reasonable disposition of water resources, promote ecological restoration and environmental protection, as welt as ensure food security.
基金Funded by the Science and Technology Development Plan of Shandong Province(No.2014GGX108001)
文摘A new type of adjustable nozzle with an annulus clearance between the surfaces of a revolved solid and the matched hole was analyzed, which contained matching parts, regulating parts, guiding elements, and sealing part. The general regulating function of the adjustable nozzle was derived and the regulating and matching characteristics were also analyzed. Through the analysis, it was concluded that the matching-profile curve of either the revolved body or matched hole should be chosen as a straight line in order to keep the linear regulating feature. Moreover, the multi-annulus-clearance nozzle was designed, and some experiments were carried out on preparing budesonide particles with the nozzle. According to the experimental results, it was proved that the annulus nozzles is practical in preparing micro-particles by supercritical fluid precipitation method.
基金Supported by the National Social Science Foundation of China(08XRK004)the Research Base Program of Humanities and Social Sciences of Guizhou Provincial Department of Education (08JD093)
文摘Based on the survey data of 150 peasant households in typical Karst mountainous area in the year 2009, causations, characteristics and influence factors of the concurrent-business behavior of peasant households during planting structure adjustment are analyzed. Result shows that there is significant positive correlation between the concurrent-business income and the household income of farmers. And the concurrent-business behavior has the tendency to be popular among the young farmers with the characteristics of relative concentration, strong will of farmers and the significant impact of education degree on the concurrent-business income. Information, capital, skill, and market awareness are the main factors affecting the concurrent-business behavior of peasant households. Countermeasures to optimize the concurrent-business behavior of peasant households are put forward, such as strengthening the skills training for farmers to improve the cultural quality of peasant households, establishing modern rural financial service system to offer capital support for the development of peasant households, setting up information base of rural labor force to provide more information and channels for the concurrent-business behavior of peasant households, and enhancing the cultivation of farmers' market awareness to improve their ability to adapt to market economy.
文摘This paper mainly makes a performance evaluation for the industrial structure adjustment of the industrial enterprises, establishing a set of evaluation index system. It uses the mathematics statistics knowledge and management knowledge to establish a scientific and operable performance evaluation model for the industrial structure adjustment of the industrial enterprises. Based on the model, it can make a performance evaluation for the internal industrial structure adjustment of the industrial enterprises and also it can evaluate the performance of the industrial structure adjustu^ent of different industries.
文摘Of its total export volume,the proportion of China’s new andhigh technology products and highvalue-added products is extremelylow. Its pure technological exportrate is only 2 percent of the total.Therefore,along with thetransformation of the mode ofgrowth of China’s nationaleconomy, a corresponding growthmode transformation should takeplace in its foreign trade sector,and it is necessary to achieve asignificant change in its importand export product mix.
