[Objective] The aim was to explore the management mode on optimal re-sources al ocation of family ranch in meadow steppe. [Method] Three double repre-sentative family ranches were selected in meadow steppe of Hulunber...[Objective] The aim was to explore the management mode on optimal re-sources al ocation of family ranch in meadow steppe. [Method] Three double repre-sentative family ranches were selected in meadow steppe of Hulunber Old Barag Banner, and the study was carried out with the baseline survey. Three family ranches were selected as the demonstrative households for the corporation study, while other three family ranches with the similar conditions were looked as the non-demonstrative households for the comparison. Demonstrative households of the fami-ly ranches reduced the stocking rate, optimized the flock structure and took a winter feeding and other means to explore the different management models on plant com-munity characteristic of family ranch. [Result] The seasonal dynamic of community characteristic in family ranches showed the single-peaks curves. The seasonal dy-namics of community coverage, height and biomass in the demonstrative households showed higher compared with the non-demonstrative households, and community density in the experiment households was lower than that of the control experiment households. Community coverage, height and biomass of degraded grassland in family ranch have a great improve after optimization of management. Community coverage, height , density and biomass were increasing in fencing plot, but decreas-ing in free grazing area. Enclosure improved grassland coverage, vegetation height, density and forage yield. Leymus chinensis played an important role in plant com-munity. The important values of Leymus chinensis, Stipa baicalensis, Cleistogenes squarrosa, and Carex duriuscula were high. Leymus chinensis important value in the demonstrative households of optimal management was higher than that in the non-demonstrative households, and Carex duriuscula important value of the non-demon-strative households was significantly higher than that of the demonstrative house-holds. The indexes of Margalef richnes,Shannon-Wiener diversity, Simpson diversity and Pielou uniformity showed that the demonstrative households were higher than the non-demonstrative households. [Conclusion] The research provides theoretical ref-erences for sustainable development of pastures dominated by family ranch.展开更多
The correct translation of the Confucian classics is based on the correct comprehension of the culture-loaded words. Therefore, this paper aims to analyze the changing meanings of these words, then find out the ways t...The correct translation of the Confucian classics is based on the correct comprehension of the culture-loaded words. Therefore, this paper aims to analyze the changing meanings of these words, then find out the ways to determine their meanings and at last point out the principle, strategies and methods of better translating these words through discussing the translation purpose and the philosophical nature of the Confucian classics.展开更多
The pace and scale of China's contemporary urbanization are stunning. This paper reviews process and the underlying driving forces of China's urbanization between 1949-2015. Contemporary China's urbanization has ex...The pace and scale of China's contemporary urbanization are stunning. This paper reviews process and the underlying driving forces of China's urbanization between 1949-2015. Contemporary China's urbanization has experienced four stages, and each has had different driving forces: 1) economic re-construction and industrialization-led urbanization 0949-1977); 2) economic reform and mar- ket-led urbanization (1978-1995); 3) economic globalization and the global-local urbanization (1996-2010); and 4) the land-economy- led urbanization (2010-). These urbanization processes and driving forces will undoubtedly provide scientific reference and have sig- nificant implications for developing countries, especially African countries, to formulate their urbanization public policies.展开更多
Several data mining techniques such as Hidden Markov Model (HMM), artificial neural network, statistical techniques and expert systems are used to model network packets in the field of intrusion detection. In this pap...Several data mining techniques such as Hidden Markov Model (HMM), artificial neural network, statistical techniques and expert systems are used to model network packets in the field of intrusion detection. In this paper a novel intrusion detection mode based on understandable Neural Network Tree (NNTree) is pre-sented. NNTree is a modular neural network with the overall structure being a Decision Tree (DT), and each non-terminal node being an Expert Neural Network (ENN). One crucial advantage of using NNTrees is that they keep the non-symbolic model ENN’s capability of learning in changing environments. Another potential advantage of using NNTrees is that they are actually “gray boxes” as they can be interpreted easily if the num-ber of inputs for each ENN is limited. We showed through experiments that the trained NNTree achieved a simple ENN at each non-terminal node as well as a satisfying recognition rate of the network packets dataset. We also compared the performance with that of a three-layer backpropagation neural network. Experimental results indicated that the NNTree based intrusion detection model achieved better performance than the neural network based intrusion detection model.展开更多
This paper reports a familial amyloid polyneuropathy (FAP) family in China. This family being investigated had 69 members of five generations. From the third generation, there have been 16 patients. The age of onset w...This paper reports a familial amyloid polyneuropathy (FAP) family in China. This family being investigated had 69 members of five generations. From the third generation, there have been 16 patients. The age of onset was about 3 to 5 decades. The initial symptoms were autonomic nerve symptoms, such as impotence, dyspepsia and diarrhoea, associated with the sensory loss of lower extremities. As the disease progressed, the upper extremities and motor ability were also involved. The duration of disease course was about 8-10 years, most patients died of infection and cachexia. Sural biopsy in 3 patients had showed positive Congo red staining. From the clinical view, this FAP family is similar to FAP I found in Japan. The true classification, however, should be confirmed by further genetic analysis.展开更多
The land use patterns in Guyuan City,Ningxia Hui Autonomous Region of China,have changed greatly over the years,due to population growth and farming and stock raising development.This study,using 50-year statis-tical ...The land use patterns in Guyuan City,Ningxia Hui Autonomous Region of China,have changed greatly over the years,due to population growth and farming and stock raising development.This study,using 50-year statis-tical data of cultivated land and 14-year spatial data of land use pattern,analyzed the developmental stages,the char-acter,and the spatial variance of farmland in the city,and discussed the driving forces of cultivated land changes based on empirical and conceptual statistical models.First,the change of cultivated land area went through different stages of rapid increase,fluctuating change,decrease and rapid decrease from 1949 to 2004,additionally,social and economic policies in different stages had an important impact on farmland variance.Second,from 1986 to 2000,the quantity of cultivated land increased,but its quality decreased.Third,social and economic factors are determinant factors in culti-vated land transition.Five constructed paths explain cultivated land transition.Factors that have direct or indirect ef-fects on farmland include the economy(Xeco),the population(Xpop),agricultural output(Xagr),and scientific input(Xsci).The sequence of impact was Xeco>Xpop>Xsci>Xagr.Among all these impacts,Xeco was the major positive one,and Xpop was the major negative one.It is urgent to take measures or adopt a policy to stop the vicious cycle in eco-environment and agriculture production.Otherwise,negative patterns of farmland use will increase,and high-quality cultivated land will continue to decline.展开更多
This study was performed in five villages of Sandwip Upazila, Chittagong district with a view to identify the tree resources, utilization pattern and economic return of major fruit and timber tree species. Information...This study was performed in five villages of Sandwip Upazila, Chittagong district with a view to identify the tree resources, utilization pattern and economic return of major fruit and timber tree species. Information collected from a total of 60 households ranging from marginal, small, medium and large categories. Number of plant species increased with the increase of homestead area. A total of 33 plant species were recorded from the homegarden, of which 19 were fruit and 14 were timber tree species. Considerable number of vegetables was also planted under the shade of the homestead trees. The investment analysis showed that average benefit-cost ratios were greater than one, net present values were positive and internal rate of returns were more than 10%. Long term investment on horticulture and timber tree species is highly profitable if species like Artocarpus heterophyllus, Cocos nucifera, Tectona grandis and Swietenia macrophylla are planted.展开更多
Communities in developing country mountain areas,in part due to their remoteness,find themselves excluded from social,political and economic systems; and excluded from access to resources. This paper aims to study the...Communities in developing country mountain areas,in part due to their remoteness,find themselves excluded from social,political and economic systems; and excluded from access to resources. This paper aims to study the impact of information and communication technologies (ICTs) on remoteness and exclusion. It utilises two models - the resource movement framework,and the "information chain" - to analyse a telecentre in one district of mountainous Huancavelica,Peru's poorest region,set in the high Andes. It finds ICTs enabling new and positive resource flows for the two key user groups:teenaged school students and young farmers. These help to maintain social networks. They also support information searches that have improved agricultural practice where other information chain resources have been available. But non-use and ineffective use of the telecentre are found where information chain resources are lacking. ICTs have some impacts on intangible elements of remoteness. In this particular example,they also offer access to some previously-excluded resources. But they have not really addressed the systematic exclusions faced by mountain communities. And they so far appear to be a technology of inequality; favouring those residents who begin with better resource endowments.The paper concludes by offering some recommendations for mountain ICT project practice.展开更多
This paper examines the impact of climate change on China's grain production and food security. The research is one of the four studies on future conditions of China's food production system under the influence of c...This paper examines the impact of climate change on China's grain production and food security. The research is one of the four studies on future conditions of China's food production system under the influence of climate change using numerical simulation methods, carried out under a national 973 project entitled "impacts of climate change on food systems in China and its adaptation". The other three studies focus on changes in cultivated land area and food production, while this study incorporates their grain yield results into a general equilibrium model to simulate future conditions of the grain market. Our simulation analysis arrives at the impact of climate change by comparing such economic variables as grain production, consumption, and GDP growth rate between a baseline scenario and two climate change scenarios. Our results are summarized as follows: (1) In 2050, the total grain production will reach 689.683 million tons--584.264 million tons of total grain consumption and 42.808 million tons of exports. Without considering losses and inventory demand, in 2050 China's grain supply and demand will remain well balanced, with a slight surplus expected. (2) Climate change is expected to benefit China's macro economy and individual sectors. In comparison with the baseline scenario of no climate change, real wage, real GDP, investment, household consumption, exports, and other macroeconomic indicators will rise under the climate change scenarios. As far as the agricultural, manufacturing, and service sectors are concerned, production, consumption, imports, and exports will each be favorably affected by climate change. (3) The favorable impact of climate change on China's macroeconomy and individual sectors under the high emissions scenario (A2) is stronger than that under the low emissions scenario (B2). (4) In the grain market, climate change is expected to increase supply, reduce imports, increase supply, and demand; and supply will increase more than demand does. All in all, if taking into the fertilization effect of CO2 account, climate change is expected to strengthen China's grain supply and safeguard food security.展开更多
Objective To examine the resilience of parents of children with congenital heart disease and to investigate socio-demographic factors that may influence parents’resilience.Methods This is a web-based survey study usi...Objective To examine the resilience of parents of children with congenital heart disease and to investigate socio-demographic factors that may influence parents’resilience.Methods This is a web-based survey study using a cross-sectional design.A purposive sampling method was utilized to recruit 515 parents who care for children with congenital heart disease.Resilience was assessed using the Dispositional Resilience Scale-Ⅱ.Based on expert-interviews,a questionnaire was designed to collect socio-demographic data.Descriptive statistics,factor analysis,and linear regressions were used to analyze data.Results A total of 413 parents completed the survey study.The mean resilience score was 3.75(SD=0.61;range=1.89–4.89)with higher scores indicating higher resilience.The linear regression models demonstrated that parents who had lower education levels and lower gross household income had lower resilience(P<0.05).Conclusions Parents reported resilience that reflected their ability to cope with stressful events and mitigate stressors associated with having and caring for children with congenital heart disease.Lower education levels and lower gross household income are associated with lower resilience.To increase parents’resilience,nursing practice and nurse-led interventions should target screening and providing support for parents at-risk for lower resilience.As lower education level and financial hardship are factors that are difficult to modify through personal efforts,charitable foundations,federal and state governments should consider programs that would provide financial and health literacy support for parents at-risk for lower resilience.展开更多
AIM: To study the effect of adenovirus (Ad)-p53 gene therapy on hepatocellular carcinoma (HCC) in a rabbit model.METHODS: VX2 tumor was grown in the liver of 24rabbits. Animals were divided into four groups: gr...AIM: To study the effect of adenovirus (Ad)-p53 gene therapy on hepatocellular carcinoma (HCC) in a rabbit model.METHODS: VX2 tumor was grown in the liver of 24rabbits. Animals were divided into four groups: group A receiving trans-arterial gene therapy (Ad-p53) only,group B receiving combined Ad-p53 therapy and transarterial embolization (lipiodol), group C receiving transarterial chemoembolization (lipiodol + mitomycin C),control group (D) receiving sodium chloride. Tumor volume (V1) was measured by using MRI (d 13).Interventional procedure was applied (d 14).Tumor volume (V2) was assessed by MRT (d 21) and the mean ratio (V2/V1) was calculated. After the second MRI,specimens of the liver were abstained and examined immunohistochemically using mutant-type p53 antibody.The positive expression was scored.RESULTS: Compared with control group ((^-x) = 3.14± 0.64), therapeutic groups all showed a significant decrease in the tumor growth ratio (P 〈 0.05). A slight difference was found between group A ((^-x) =2.35 ±0.59) and group B ((^-x) = 1.75 ± 0.28) (P = 0.048). Nostatistically significant difference was observed between group B and group C ((^-x) = 2.00 ± 0.44). The positive expression rate of mutant-type p53 was the lowest in group B and significantly different between group A and group C (P 〈 0.05).Compared to the control subjects, groups A and C both showed a decrease in the expression of mutant-type p53, but there was no significant difference between them.CONCLUSION: Trans-arterial Ad-p53 gene therapy can reduce tumor growth of HCC in rabbit model.展开更多
The goal of this investigation was to analyze the impact of some production variables (input) on agricultural pro- ductivity growth (output) in China from 1989~2002. We selected through random sampling Zhejiang Provi...The goal of this investigation was to analyze the impact of some production variables (input) on agricultural pro- ductivity growth (output) in China from 1989~2002. We selected through random sampling Zhejiang Province for our disaggre- gate analysis with the use of Cobb-Douglas function. The estimation results showed that all key parameters are significant and are of the expected sign. Labor and that capital and land have positive impact on agricultural productivity growth.展开更多
The article used general equilibrium model to analyze the change of gross domestic product and industry output affected by water resources policies in Beijing City by using GEMPACK soft tool.The article researches on ...The article used general equilibrium model to analyze the change of gross domestic product and industry output affected by water resources policies in Beijing City by using GEMPACK soft tool.The article researches on rules of water supply and demand,evaluating water resources,building water resources input and output table,establishing water computable general equilibrium model and stimulating water policy.The stimulation gives a scenario that increases water price by 10%.The result shows the following aspects.First,water resources policy infects gross domestic product and industry output in different ways.There are different behaviors in different industries as to the water policy. Agriculture industry has the same tendency as water price change and it has more sensitive to water quantity than to water price.For basic energy industries such as oil and chemistry and gas,they show diversity tendency.As to some high water consumer industry such as paper and textile etc.,water resource economic policy can infect them greatly and can promote them to accomplish more water-saving technology.Waste water and construction and service industries show the same tendency as to water policy.Second,government should pay more attention to water resource policy by macro economic administration.The simulation also shows that the output and supply and consumer price change more than expect as to water policy in a free market economic in water industry.So as to a government policy maker,one should be more carefully and prepare suitable forecast and plan to water policy and its negative impact.展开更多
China's "Belt and Road" initiative is emerging as the Western-dominated world order is declining. Capitalism has intensified the rich-poor divide and power politics have led to great upheavals. Western values have ...China's "Belt and Road" initiative is emerging as the Western-dominated world order is declining. Capitalism has intensified the rich-poor divide and power politics have led to great upheavals. Western values have caused a "value dislocation" for non-Western countries. The world is calling for new development concepts. The "Belt and Road" initiative has emerged as an answer. It embodies China's ideas on global development. First, it works for the "common prosperity" of every country, which will ease contradictions between the South and the North. Second, it emphasizes geo-economie integration that will heal the fragmentation of Eurasia. Third, it advocates linkages between people and inclusiveness to create a new kind of civilization. However, many difficulties and challenges lie ahead for the implementation of the "Belt and Road" initiative.展开更多
The time has come for the constitution of the Association of Southeast Asian Nations (ASEAN) economic community and many facts have been analyzed regarding this topic. This paper presents the results of the statisti...The time has come for the constitution of the Association of Southeast Asian Nations (ASEAN) economic community and many facts have been analyzed regarding this topic. This paper presents the results of the statistical analysis applied to several economic parameters which firstly show how their integration pattern adjusts with a considerable good fitting to the optimum currency area model and to its extended version by Behrens; and secondly how the 10 members of this group are moving at relatively same speed in spite of their differences, that are also inferred for ranging.展开更多
This paper presents a new method for the correct selection of mining methods and pre-diction of main technological and economic indexes of the face in the gentle inclined thick seams with the application of the artifi...This paper presents a new method for the correct selection of mining methods and pre-diction of main technological and economic indexes of the face in the gentle inclined thick seams with the application of the artificial neural network theory and the expert system. The theory anal- ysis and calculating results indicate that the method is reliable, practical and precise. This method has strongly capabilities of self-study and non-linear dynamic data process. It is expected to be widely applied in the policy decision and prediction of mining technology in coal mine.展开更多
Levying carbon tax is conducive to reducing carbon dioxide emissions and protecting the environment.The author firstly reviewed some relevant empirical studies on carbon tax both home and abroad,and then established t...Levying carbon tax is conducive to reducing carbon dioxide emissions and protecting the environment.The author firstly reviewed some relevant empirical studies on carbon tax both home and abroad,and then established the CGE model and simulated levying carbon tax in China.The study found that levying carbon tax would have little impact on China's economy:in a short-term,China's GDP might decrease by 0.51%,while in a long-term it might decrease by 0.08%;however,the carbon dioxide emissions would be substantially reduced.Meanwhile,levying carbon tax has some negative impact on the output of each industry in the very economic structure;of this,the mineral extractive industries would be influenced the most.Then the author summarized experience of levying carbon tax in foreign countries.展开更多
Background:Most of previous studies aimed to estimate the effect of nurse staffing on quality of acute hospital care have used stochastic methods and their results are mixed.Objective:To measure the magnitude of effec...Background:Most of previous studies aimed to estimate the effect of nurse staffing on quality of acute hospital care have used stochastic methods and their results are mixed.Objective:To measure the magnitude of effect of nurse-staffing level on increasing quality of acute care services in long-run.Data:The number of practicing nurses'density per 1000 population as the proxy of nurse-staffing level and three Health Care Quality Indicators(HCQI)included 30-day mortality per 100 patients based on acute myocardial infarction(MORTAMIO),hemorrhagic stroke(MORTHSTO)and ischemic stroke(MORTISTO)were collected as a part of ongoing project by OECD.org in panels of 26 OECD countries over 2005-2015 period.Method:Panel data analysis.Results:There were committed relationships from nurse-staffing level to the enhancement of HCQI i.e.1%increase in nurse-staffing level would reduce the rates of patient mortality based on MORTAMIO,MORTHSTO and MORTISTO by 0.65%,0.60%and 0.80%,respectively.Furthermore,the role of nursestaffing level in increasing overall HCQI were simulated at the highest level in Sweden(-3.53),Denmark(-3.31),Canada(-2.59),Netherlands(-2.33),Finland(-2.09),Switzerland(-1.72),Australia(-1.64)and United States(-1.53).Conclusion:A higher proportion of nurses-staffing level is associated with higher quality of acute care services in OECD countries.Also,the nursing characteristics of Sweden,Denmark,Canada,Netherlands,Finland,Switzerland,Australia and United States would be good patterns for other countries to maximize nursing outcomes in the care of patients with acute and life-threatening conditions by reducing the risk of complication,mortality and adverse clinical outcomes.展开更多
This article presents a case study of the Siam Commercial Bank (SCB) by investigating why and how SCB implemented organizational restructuring during the uncertain economic environment, and gives an overview of the ...This article presents a case study of the Siam Commercial Bank (SCB) by investigating why and how SCB implemented organizational restructuring during the uncertain economic environment, and gives an overview of the Thai commercial bank industry. This article presents and discusses SCB's strategy implementation in its organization during 1997-2010. This case study is aimed to provide some guidelines for other companies in developing and in choosing strategies for their business sustainability in the global change, and in choosing the implementation of their organization structure for competitive markets.展开更多
基金Supported by Special Fund for Agro-scientific Research in the Public Interest(201003019,201003061,201303060)the National Natural Science Foundation of China(41201199)+1 种基金International Science and Technology Cooperation Project(2012DFA31290)Modern Agricultural Technology System of Special Funding~~
文摘[Objective] The aim was to explore the management mode on optimal re-sources al ocation of family ranch in meadow steppe. [Method] Three double repre-sentative family ranches were selected in meadow steppe of Hulunber Old Barag Banner, and the study was carried out with the baseline survey. Three family ranches were selected as the demonstrative households for the corporation study, while other three family ranches with the similar conditions were looked as the non-demonstrative households for the comparison. Demonstrative households of the fami-ly ranches reduced the stocking rate, optimized the flock structure and took a winter feeding and other means to explore the different management models on plant com-munity characteristic of family ranch. [Result] The seasonal dynamic of community characteristic in family ranches showed the single-peaks curves. The seasonal dy-namics of community coverage, height and biomass in the demonstrative households showed higher compared with the non-demonstrative households, and community density in the experiment households was lower than that of the control experiment households. Community coverage, height and biomass of degraded grassland in family ranch have a great improve after optimization of management. Community coverage, height , density and biomass were increasing in fencing plot, but decreas-ing in free grazing area. Enclosure improved grassland coverage, vegetation height, density and forage yield. Leymus chinensis played an important role in plant com-munity. The important values of Leymus chinensis, Stipa baicalensis, Cleistogenes squarrosa, and Carex duriuscula were high. Leymus chinensis important value in the demonstrative households of optimal management was higher than that in the non-demonstrative households, and Carex duriuscula important value of the non-demon-strative households was significantly higher than that of the demonstrative house-holds. The indexes of Margalef richnes,Shannon-Wiener diversity, Simpson diversity and Pielou uniformity showed that the demonstrative households were higher than the non-demonstrative households. [Conclusion] The research provides theoretical ref-erences for sustainable development of pastures dominated by family ranch.
文摘The correct translation of the Confucian classics is based on the correct comprehension of the culture-loaded words. Therefore, this paper aims to analyze the changing meanings of these words, then find out the ways to determine their meanings and at last point out the principle, strategies and methods of better translating these words through discussing the translation purpose and the philosophical nature of the Confucian classics.
基金Under the auspices of the National Natural Science Foundation of China(No.41590844)the Independent Research Program of Tsinghai University(No.2015THZ01)
文摘The pace and scale of China's contemporary urbanization are stunning. This paper reviews process and the underlying driving forces of China's urbanization between 1949-2015. Contemporary China's urbanization has experienced four stages, and each has had different driving forces: 1) economic re-construction and industrialization-led urbanization 0949-1977); 2) economic reform and mar- ket-led urbanization (1978-1995); 3) economic globalization and the global-local urbanization (1996-2010); and 4) the land-economy- led urbanization (2010-). These urbanization processes and driving forces will undoubtedly provide scientific reference and have sig- nificant implications for developing countries, especially African countries, to formulate their urbanization public policies.
基金Supported in part by the National Natural Science Foundation of China (No.60272046, No.60102011), Na-tional High Technology Project of China (No.2002AA143010), Natural Science Foundation of Jiangsu Province (No.BK2001042), and the Foundation for Excellent Doctoral Dissertation of Southeast Univer-sity (No.YBJJ0412).
文摘Several data mining techniques such as Hidden Markov Model (HMM), artificial neural network, statistical techniques and expert systems are used to model network packets in the field of intrusion detection. In this paper a novel intrusion detection mode based on understandable Neural Network Tree (NNTree) is pre-sented. NNTree is a modular neural network with the overall structure being a Decision Tree (DT), and each non-terminal node being an Expert Neural Network (ENN). One crucial advantage of using NNTrees is that they keep the non-symbolic model ENN’s capability of learning in changing environments. Another potential advantage of using NNTrees is that they are actually “gray boxes” as they can be interpreted easily if the num-ber of inputs for each ENN is limited. We showed through experiments that the trained NNTree achieved a simple ENN at each non-terminal node as well as a satisfying recognition rate of the network packets dataset. We also compared the performance with that of a three-layer backpropagation neural network. Experimental results indicated that the NNTree based intrusion detection model achieved better performance than the neural network based intrusion detection model.
文摘This paper reports a familial amyloid polyneuropathy (FAP) family in China. This family being investigated had 69 members of five generations. From the third generation, there have been 16 patients. The age of onset was about 3 to 5 decades. The initial symptoms were autonomic nerve symptoms, such as impotence, dyspepsia and diarrhoea, associated with the sensory loss of lower extremities. As the disease progressed, the upper extremities and motor ability were also involved. The duration of disease course was about 8-10 years, most patients died of infection and cachexia. Sural biopsy in 3 patients had showed positive Congo red staining. From the clinical view, this FAP family is similar to FAP I found in Japan. The true classification, however, should be confirmed by further genetic analysis.
基金Under the auspices of Major State Basic Research Development Program of China (No. 2002CB111506)National Natural Science Foundation of China (No. 30670374)Sixth Framework Programme of European Union (Priority 1.1.6.3) (No. 003874-2)
文摘The land use patterns in Guyuan City,Ningxia Hui Autonomous Region of China,have changed greatly over the years,due to population growth and farming and stock raising development.This study,using 50-year statis-tical data of cultivated land and 14-year spatial data of land use pattern,analyzed the developmental stages,the char-acter,and the spatial variance of farmland in the city,and discussed the driving forces of cultivated land changes based on empirical and conceptual statistical models.First,the change of cultivated land area went through different stages of rapid increase,fluctuating change,decrease and rapid decrease from 1949 to 2004,additionally,social and economic policies in different stages had an important impact on farmland variance.Second,from 1986 to 2000,the quantity of cultivated land increased,but its quality decreased.Third,social and economic factors are determinant factors in culti-vated land transition.Five constructed paths explain cultivated land transition.Factors that have direct or indirect ef-fects on farmland include the economy(Xeco),the population(Xpop),agricultural output(Xagr),and scientific input(Xsci).The sequence of impact was Xeco>Xpop>Xsci>Xagr.Among all these impacts,Xeco was the major positive one,and Xpop was the major negative one.It is urgent to take measures or adopt a policy to stop the vicious cycle in eco-environment and agriculture production.Otherwise,negative patterns of farmland use will increase,and high-quality cultivated land will continue to decline.
文摘This study was performed in five villages of Sandwip Upazila, Chittagong district with a view to identify the tree resources, utilization pattern and economic return of major fruit and timber tree species. Information collected from a total of 60 households ranging from marginal, small, medium and large categories. Number of plant species increased with the increase of homestead area. A total of 33 plant species were recorded from the homegarden, of which 19 were fruit and 14 were timber tree species. Considerable number of vegetables was also planted under the shade of the homestead trees. The investment analysis showed that average benefit-cost ratios were greater than one, net present values were positive and internal rate of returns were more than 10%. Long term investment on horticulture and timber tree species is highly profitable if species like Artocarpus heterophyllus, Cocos nucifera, Tectona grandis and Swietenia macrophylla are planted.
基金a grant from the International Development Research Centre, Canada, and Microsoft Corporationsupport of the Seminario Permanente de Investigacion Agraria (Permanent Seminar on Agricultural Research), SEPIA
文摘Communities in developing country mountain areas,in part due to their remoteness,find themselves excluded from social,political and economic systems; and excluded from access to resources. This paper aims to study the impact of information and communication technologies (ICTs) on remoteness and exclusion. It utilises two models - the resource movement framework,and the "information chain" - to analyse a telecentre in one district of mountainous Huancavelica,Peru's poorest region,set in the high Andes. It finds ICTs enabling new and positive resource flows for the two key user groups:teenaged school students and young farmers. These help to maintain social networks. They also support information searches that have improved agricultural practice where other information chain resources have been available. But non-use and ineffective use of the telecentre are found where information chain resources are lacking. ICTs have some impacts on intangible elements of remoteness. In this particular example,they also offer access to some previously-excluded resources. But they have not really addressed the systematic exclusions faced by mountain communities. And they so far appear to be a technology of inequality; favouring those residents who begin with better resource endowments.The paper concludes by offering some recommendations for mountain ICT project practice.
文摘This paper examines the impact of climate change on China's grain production and food security. The research is one of the four studies on future conditions of China's food production system under the influence of climate change using numerical simulation methods, carried out under a national 973 project entitled "impacts of climate change on food systems in China and its adaptation". The other three studies focus on changes in cultivated land area and food production, while this study incorporates their grain yield results into a general equilibrium model to simulate future conditions of the grain market. Our simulation analysis arrives at the impact of climate change by comparing such economic variables as grain production, consumption, and GDP growth rate between a baseline scenario and two climate change scenarios. Our results are summarized as follows: (1) In 2050, the total grain production will reach 689.683 million tons--584.264 million tons of total grain consumption and 42.808 million tons of exports. Without considering losses and inventory demand, in 2050 China's grain supply and demand will remain well balanced, with a slight surplus expected. (2) Climate change is expected to benefit China's macro economy and individual sectors. In comparison with the baseline scenario of no climate change, real wage, real GDP, investment, household consumption, exports, and other macroeconomic indicators will rise under the climate change scenarios. As far as the agricultural, manufacturing, and service sectors are concerned, production, consumption, imports, and exports will each be favorably affected by climate change. (3) The favorable impact of climate change on China's macroeconomy and individual sectors under the high emissions scenario (A2) is stronger than that under the low emissions scenario (B2). (4) In the grain market, climate change is expected to increase supply, reduce imports, increase supply, and demand; and supply will increase more than demand does. All in all, if taking into the fertilization effect of CO2 account, climate change is expected to strengthen China's grain supply and safeguard food security.
基金Sigma Theta Tau Chi Chapter,American Association of Nurse Practitioners,and Ethan M.Lindberg Foundation.
文摘Objective To examine the resilience of parents of children with congenital heart disease and to investigate socio-demographic factors that may influence parents’resilience.Methods This is a web-based survey study using a cross-sectional design.A purposive sampling method was utilized to recruit 515 parents who care for children with congenital heart disease.Resilience was assessed using the Dispositional Resilience Scale-Ⅱ.Based on expert-interviews,a questionnaire was designed to collect socio-demographic data.Descriptive statistics,factor analysis,and linear regressions were used to analyze data.Results A total of 413 parents completed the survey study.The mean resilience score was 3.75(SD=0.61;range=1.89–4.89)with higher scores indicating higher resilience.The linear regression models demonstrated that parents who had lower education levels and lower gross household income had lower resilience(P<0.05).Conclusions Parents reported resilience that reflected their ability to cope with stressful events and mitigate stressors associated with having and caring for children with congenital heart disease.Lower education levels and lower gross household income are associated with lower resilience.To increase parents’resilience,nursing practice and nurse-led interventions should target screening and providing support for parents at-risk for lower resilience.As lower education level and financial hardship are factors that are difficult to modify through personal efforts,charitable foundations,federal and state governments should consider programs that would provide financial and health literacy support for parents at-risk for lower resilience.
文摘AIM: To study the effect of adenovirus (Ad)-p53 gene therapy on hepatocellular carcinoma (HCC) in a rabbit model.METHODS: VX2 tumor was grown in the liver of 24rabbits. Animals were divided into four groups: group A receiving trans-arterial gene therapy (Ad-p53) only,group B receiving combined Ad-p53 therapy and transarterial embolization (lipiodol), group C receiving transarterial chemoembolization (lipiodol + mitomycin C),control group (D) receiving sodium chloride. Tumor volume (V1) was measured by using MRI (d 13).Interventional procedure was applied (d 14).Tumor volume (V2) was assessed by MRT (d 21) and the mean ratio (V2/V1) was calculated. After the second MRI,specimens of the liver were abstained and examined immunohistochemically using mutant-type p53 antibody.The positive expression was scored.RESULTS: Compared with control group ((^-x) = 3.14± 0.64), therapeutic groups all showed a significant decrease in the tumor growth ratio (P 〈 0.05). A slight difference was found between group A ((^-x) =2.35 ±0.59) and group B ((^-x) = 1.75 ± 0.28) (P = 0.048). Nostatistically significant difference was observed between group B and group C ((^-x) = 2.00 ± 0.44). The positive expression rate of mutant-type p53 was the lowest in group B and significantly different between group A and group C (P 〈 0.05).Compared to the control subjects, groups A and C both showed a decrease in the expression of mutant-type p53, but there was no significant difference between them.CONCLUSION: Trans-arterial Ad-p53 gene therapy can reduce tumor growth of HCC in rabbit model.
文摘The goal of this investigation was to analyze the impact of some production variables (input) on agricultural pro- ductivity growth (output) in China from 1989~2002. We selected through random sampling Zhejiang Province for our disaggre- gate analysis with the use of Cobb-Douglas function. The estimation results showed that all key parameters are significant and are of the expected sign. Labor and that capital and land have positive impact on agricultural productivity growth.
基金Project supported by the Natural Science Foundation of China(Grant no.40730632/40671035)the Special Fund of Ministry of Science and Technology,China(Grant no. 2006DFA21890)the Key Project of International Cooperation in CAS (Grant no.GJHZ06)
文摘The article used general equilibrium model to analyze the change of gross domestic product and industry output affected by water resources policies in Beijing City by using GEMPACK soft tool.The article researches on rules of water supply and demand,evaluating water resources,building water resources input and output table,establishing water computable general equilibrium model and stimulating water policy.The stimulation gives a scenario that increases water price by 10%.The result shows the following aspects.First,water resources policy infects gross domestic product and industry output in different ways.There are different behaviors in different industries as to the water policy. Agriculture industry has the same tendency as water price change and it has more sensitive to water quantity than to water price.For basic energy industries such as oil and chemistry and gas,they show diversity tendency.As to some high water consumer industry such as paper and textile etc.,water resource economic policy can infect them greatly and can promote them to accomplish more water-saving technology.Waste water and construction and service industries show the same tendency as to water policy.Second,government should pay more attention to water resource policy by macro economic administration.The simulation also shows that the output and supply and consumer price change more than expect as to water policy in a free market economic in water industry.So as to a government policy maker,one should be more carefully and prepare suitable forecast and plan to water policy and its negative impact.
文摘China's "Belt and Road" initiative is emerging as the Western-dominated world order is declining. Capitalism has intensified the rich-poor divide and power politics have led to great upheavals. Western values have caused a "value dislocation" for non-Western countries. The world is calling for new development concepts. The "Belt and Road" initiative has emerged as an answer. It embodies China's ideas on global development. First, it works for the "common prosperity" of every country, which will ease contradictions between the South and the North. Second, it emphasizes geo-economie integration that will heal the fragmentation of Eurasia. Third, it advocates linkages between people and inclusiveness to create a new kind of civilization. However, many difficulties and challenges lie ahead for the implementation of the "Belt and Road" initiative.
文摘The time has come for the constitution of the Association of Southeast Asian Nations (ASEAN) economic community and many facts have been analyzed regarding this topic. This paper presents the results of the statistical analysis applied to several economic parameters which firstly show how their integration pattern adjusts with a considerable good fitting to the optimum currency area model and to its extended version by Behrens; and secondly how the 10 members of this group are moving at relatively same speed in spite of their differences, that are also inferred for ranging.
文摘This paper presents a new method for the correct selection of mining methods and pre-diction of main technological and economic indexes of the face in the gentle inclined thick seams with the application of the artificial neural network theory and the expert system. The theory anal- ysis and calculating results indicate that the method is reliable, practical and precise. This method has strongly capabilities of self-study and non-linear dynamic data process. It is expected to be widely applied in the policy decision and prediction of mining technology in coal mine.
文摘Levying carbon tax is conducive to reducing carbon dioxide emissions and protecting the environment.The author firstly reviewed some relevant empirical studies on carbon tax both home and abroad,and then established the CGE model and simulated levying carbon tax in China.The study found that levying carbon tax would have little impact on China's economy:in a short-term,China's GDP might decrease by 0.51%,while in a long-term it might decrease by 0.08%;however,the carbon dioxide emissions would be substantially reduced.Meanwhile,levying carbon tax has some negative impact on the output of each industry in the very economic structure;of this,the mineral extractive industries would be influenced the most.Then the author summarized experience of levying carbon tax in foreign countries.
文摘Background:Most of previous studies aimed to estimate the effect of nurse staffing on quality of acute hospital care have used stochastic methods and their results are mixed.Objective:To measure the magnitude of effect of nurse-staffing level on increasing quality of acute care services in long-run.Data:The number of practicing nurses'density per 1000 population as the proxy of nurse-staffing level and three Health Care Quality Indicators(HCQI)included 30-day mortality per 100 patients based on acute myocardial infarction(MORTAMIO),hemorrhagic stroke(MORTHSTO)and ischemic stroke(MORTISTO)were collected as a part of ongoing project by OECD.org in panels of 26 OECD countries over 2005-2015 period.Method:Panel data analysis.Results:There were committed relationships from nurse-staffing level to the enhancement of HCQI i.e.1%increase in nurse-staffing level would reduce the rates of patient mortality based on MORTAMIO,MORTHSTO and MORTISTO by 0.65%,0.60%and 0.80%,respectively.Furthermore,the role of nursestaffing level in increasing overall HCQI were simulated at the highest level in Sweden(-3.53),Denmark(-3.31),Canada(-2.59),Netherlands(-2.33),Finland(-2.09),Switzerland(-1.72),Australia(-1.64)and United States(-1.53).Conclusion:A higher proportion of nurses-staffing level is associated with higher quality of acute care services in OECD countries.Also,the nursing characteristics of Sweden,Denmark,Canada,Netherlands,Finland,Switzerland,Australia and United States would be good patterns for other countries to maximize nursing outcomes in the care of patients with acute and life-threatening conditions by reducing the risk of complication,mortality and adverse clinical outcomes.
文摘This article presents a case study of the Siam Commercial Bank (SCB) by investigating why and how SCB implemented organizational restructuring during the uncertain economic environment, and gives an overview of the Thai commercial bank industry. This article presents and discusses SCB's strategy implementation in its organization during 1997-2010. This case study is aimed to provide some guidelines for other companies in developing and in choosing strategies for their business sustainability in the global change, and in choosing the implementation of their organization structure for competitive markets.