Al-1.0%Sc-1.0%Zr (mass fraction) master alloy was prepared at different cooling rates. The morphology and thermodynamics data of the primary particles of the master alloy were investigated by X-ray diffraction (XRD...Al-1.0%Sc-1.0%Zr (mass fraction) master alloy was prepared at different cooling rates. The morphology and thermodynamics data of the primary particles of the master alloy were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). It shows that the primary particles are dendrite-shaped particles comprised of several attached small cubic, cusped-cubic or crucifer shape particles at slow cooling rate. However, the primary particles are separated with crucifer shape at intermediate cooling rate, and they are cubic with cusped-cubic shape at high cooling rate. Meanwhile, the separated and attached particles present AlaSc/AlaZr1-xScx core-shell structure. The formation mechanism of the structure was systematically investigated by a mathematical model.展开更多
An important factor for the sustainability of soils highly susceptible to degradation is the use of monitoring tools that promptly and realistically reflect changes imposed on soil by different cropping systems. To se...An important factor for the sustainability of soils highly susceptible to degradation is the use of monitoring tools that promptly and realistically reflect changes imposed on soil by different cropping systems. To select soil quality indicator variables in sugarcane (Saccharum officinarum L.) production areas that fulfill the criteria of sensitivity to management practices and between-season consistency in the management discrimination, ten composite soil samples (0–10 cm) were collected in July 2005 (rainy season) and again in March 2006 (dry season) from areas under cultivation of organic sugarcane (OS), green sugarcane (GS), burned sugarcane (BS) and from an adjacent native forest (NF) area at Usina Triunfo, Boca da Mata, Alagoas, Brazil. Microbial biomass-C (MBC), total organic C (TOC), soil enzyme activity expressed as the rate of fluorescein diacetate (FDA) hydrolysis, mean weight diameter of water-stable soil aggregates (MWD), and percentage of water-stable macroaggregates (PWSA) were analyzed. Although MBC and TOC were higher in NF than in the cultivated areas, no differences were observed in these C pools between the three sugarcane systems. The response of FDA to the site management was dependent on the sampling time. In the rainy period, the activity followed the order: NF > OS > GS > BS, whereas in the dry season, only NF differed from the other treatments. Irrespective of the sampling time, MWD and PWSA decreased in the order NF > OS = GS > BS. The variables MWD and PWSA are quite sensitive for discriminating between site management histories regardless the sampling season.展开更多
While the four species of horseshoe crabs share many common reproductive traits with respect to their reproductive systems, they do differ with respect to their mating behavior (monogamy vs. polygynandry). Past rese...While the four species of horseshoe crabs share many common reproductive traits with respect to their reproductive systems, they do differ with respect to their mating behavior (monogamy vs. polygynandry). Past research has attributed these differences to a number of factors including: spawning densities, operational sex ratios (OSR's), male condition (or age), environmental and/or genetic factors, or a combination thereof. Mating behaviors in the three Asian horseshoe crab species (Tachy-pleus gigas, T. tridentatus, and Carcinoscorpius rotundicauda) with low spawning densities and 1:1 operational sex ratios are typically monogamous. In Limuluspolyphemus, mating behavior is more variable ranging fi'om monogamy to polygynandry. Here we provide evidence, through a long term behavioral study, that variation in mating behavior is influenced by population density in L. polyphemus. Our study population on two beaches in Connecticut (Long Island Sound) have a spawning density 400 times less than that found in Delaware Bay (0.002 females/m2 vs. 0.8 females/m2) but similar operational sex ratios. Between 90%-95% of all spawning females in CT were paired with only one male, thus exhibiting monogamous behavior. In contrast, between 30 and 60% of spawning females in Delaware Bay have more than one mate and produce clutches of eggs with multiple paternities. Male condition played no role in mating behavior in CT populations. We also observed that on average 18% of the females on the spawning beaches are single. These results suggest that population density is an important condition that determines mating behavior. Also, low population density may lead to decreased mate finding ability and lost opportunities for spawning展开更多
There are limited data on celiac disease(CD) from India.The limited knowledge about CD in India might be attributed to several factors.The fi rst meeting of the Indian Task Force for Celiac Disease was held in the Asi...There are limited data on celiac disease(CD) from India.The limited knowledge about CD in India might be attributed to several factors.The fi rst meeting of the Indian Task Force for Celiac Disease was held in the Asian Institute of Gastroenterology,Hyderabad,India in December 2008.The objectives of the meeting were to focus research on prevalence of CD in the wheat-eating Northern vs the rice-eating Southern Indian population,low-budget serological assays to study the underprivileged population,to involve other medical subspecialties in CD,to suggest proper legislation regarding wheat food labeling,and to organize affordable food substitutes for patients with celiac disease.展开更多
Seeking to alleviate and eradicate Bao (the minimum livelihood guarantee system) extreme povertY, the Chinese government has extended Di to the entire rural sector. It has also enhanced agricultural policies and str...Seeking to alleviate and eradicate Bao (the minimum livelihood guarantee system) extreme povertY, the Chinese government has extended Di to the entire rural sector. It has also enhanced agricultural policies and strengthened its promotion of rural socioeconomic development. In more-developed regions of the country, the Di Bao program-in combination with integrated urban and rural social insurance and public services-has significantly reduced rates of poverty and financial vulnerability, and additional employment-promotion policies have created opportunities for Di Bao recipients to achieve incomes above the poverty-line. However, because of the high number of extremely poor households in disproportionately poor areas and the paucity of locally-available financial resources there, the intensity of intervention is still insufficient. Inadequate coordination of policies and shortcomings in the targeting of subsidies have resulted in both under-coverage and welfare-leakage as well. Consequently, in China's efforts to eradicate extreme poverty, increasing the effectiveness of poverty-reduction strategies in poor areas remains a key prioritY.展开更多
With the acceleration of urbanization, the lifestyles and living expenses of farmers and urban residents is increasingly more and more similar .However, from the measures in terms of the minimum living guarantee, the ...With the acceleration of urbanization, the lifestyles and living expenses of farmers and urban residents is increasingly more and more similar .However, from the measures in terms of the minimum living guarantee, the level of protection of rural and urban residents really have a large gap. The Third Plenary Session of the 18th Central Committee noted "to promote urban and rural minimum living security system and rural development", "to speed up and improve the social security management system and operate the service system",These tell us that only to realize the integration of urban and rural subsistence allowances, improve the underpinning of the social security system, can we build a moderately prosperous society.展开更多
Developing modern agriculture is an important aspect of urban and rural integration. Chintz has adopted a new, highly compatible, multipronged approach. Judgingfrom current agricultural and rural policies, factors lik...Developing modern agriculture is an important aspect of urban and rural integration. Chintz has adopted a new, highly compatible, multipronged approach. Judgingfrom current agricultural and rural policies, factors like capital, labor and land will continue to interact and revolve. The transformation of China's rural land tenure system is at a critical posifion in the overall strategy of developing tile rural economy. However, rural institutional reform will inevitably be constrained by the path and pattern China's industrialization, urbanization and agricultural modernization take. Creating a new pattern of urban and rural socioeconomic integration requires reform and improvement of rural grassroots governance structure. The interaction and reconsolidation of the factors have again become intertwined with the superstructure of rural society and will inevitably affect the direction and pace of rural grassroots governance structural reJbrm. Protecting the economic interests of farmers while respecting their democratic rights will always be at the heart of agricultural modernization.展开更多
Presently, Chinese urban and rural medicare systems differ from each other in many aspects including coverage, payment, and funding patterns, etc, which accounting mainly for the serious situation of the division betw...Presently, Chinese urban and rural medicare systems differ from each other in many aspects including coverage, payment, and funding patterns, etc, which accounting mainly for the serious situation of the division between urban and rural areas, among different areas and among different communities. The paper will firstly illustrate the purposes and principles of integrating urban and turn/medical insurance systems. Then, with the development of socialist core value--equity, the consideration of the development of the social security system, and the consideration of the strengthening of the rural and urban economy, integrating three main basic health insurance systems is required to take place urgently, In the last part, it provides the strategic development of the inter,ration of the dual svstem.so as to build an uniform social insurance system.展开更多
In China, the income tax of enterprise is very different between foreign funded enterprises and other domestic enterprises. It is believed that this discrimination is harmful to the entire economy. So there is a refor...In China, the income tax of enterprise is very different between foreign funded enterprises and other domestic enterprises. It is believed that this discrimination is harmful to the entire economy. So there is a reform in the tax system to build a uniform enterprise income tax. This is a significant reform in China's tax system, so every decision about this have to count the cost and the benefit carefully. The author has introduced the Computable General Equilibrium (CGE) to simulate this new tax system and value its benefit and cost. There are two different models in the paper; they are of different assumptions and for different purposes. Model I is a static CGE model and model II is a Ramsey Dynamic model. The static model is mainly used for comparative static approach to examine how the tax reform will change the endogenous variables. According to the results of the model, more goods will be produced by both of the DFEs and FIEs after the tax reform in the medium and low tax effective tax rate situations. If the nominal tax rates decrease 24.24% (from 33% to 25%), the enterprise income tax will only reduce 19.36% and the total tax revenue will only reduce 1.911%. The dynamic model will concentrate on the costs and benefits during the transition. From the results of the model, a lower tax rate will increase the level of investment, capital stock, capital prices, wage rate and also the growth rates through transition. If the capital tax rates are changed gradually, the fluctuating of transition will be smoothed a little.展开更多
Asia has a special significance in China’s neighborhood strategy.Geographically,the Belt and Road Initiative faces the countries of Asia or China’s neighbors in the first place.Asia is clearly marked by an imbalance...Asia has a special significance in China’s neighborhood strategy.Geographically,the Belt and Road Initiative faces the countries of Asia or China’s neighbors in the first place.Asia is clearly marked by an imbalance in and“absence”of regional economic integration.This“absence”is two-fold:it is expressed on the one hand as a lack of unified institutional arrangements for regional economic integration,and on the other as the inability of underdeveloped countries in the region to truly participate in regional economic integration and thereby gain opportunities for development.Compared with the rule-oriented nature of existing regional economic integration mechanisms,the Belt and Road Initiative,as a new type of regional cooperation mechanism,displays an orientation towards development.All existing regional economic integration arrangements,regardless of their form,establish specific rules on access thresholds,the rights and duties of member countries,schedules and roadmaps,dispute resolution mechanisms and so forth.This is not the case for the Belt and Road,which is not predicated on specific rules,but establishes its overall framework by orienting itself towards development.Overall,the development orientation of the Belt and Road is helpful not only in overcoming the inherent defects of Asian regional economic integration,but in responding to the new challenge of anti-globalization.This is an institutional public good that China offers to Asia and to the world.展开更多
China's recent declaration of principles on its exchange rate mechanism has made it very clear that any move should be on China's own initiative; such a move should be sustainable and under control. China has adopte...China's recent declaration of principles on its exchange rate mechanism has made it very clear that any move should be on China's own initiative; such a move should be sustainable and under control. China has adopted gradualism in the exchange rate reform process. On July 21st, 2005, China changed Renminbi (RMB) pariy (appreciation) by 2 percent, signaling the exchange market reform process. This paper is to study the past history of the crawling-peg of RMB on the US dollar with a view of its future reform. The flexibility provided by the crawling-peg still fits well with China's status quo. However, the flexible mechanism should follow the trend of China's economic development with well-timed parity changes. The extent of the fluctuation band rests upon China's ability to maintain its currency stability to counter future speculation and shocks. Only when the market mechanism is restored in China can an equilibrium RMB exchange rate be reached.展开更多
基金Project(2012CB619503)supported by the National Basic Research Program of ChinaProject(2013AA031001)supported by the National High-tech Research and Development Program of ChinaProject(2012DFA50630)supported by the International Science and Technology Cooperation Program of China
文摘Al-1.0%Sc-1.0%Zr (mass fraction) master alloy was prepared at different cooling rates. The morphology and thermodynamics data of the primary particles of the master alloy were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). It shows that the primary particles are dendrite-shaped particles comprised of several attached small cubic, cusped-cubic or crucifer shape particles at slow cooling rate. However, the primary particles are separated with crucifer shape at intermediate cooling rate, and they are cubic with cusped-cubic shape at high cooling rate. Meanwhile, the separated and attached particles present AlaSc/AlaZr1-xScx core-shell structure. The formation mechanism of the structure was systematically investigated by a mathematical model.
基金Project supported by the Brazilian Corporation for Agricultural Research (No.02.03.01.01.04) the Usina Triunfo(Alagoas State), Brazil.
文摘An important factor for the sustainability of soils highly susceptible to degradation is the use of monitoring tools that promptly and realistically reflect changes imposed on soil by different cropping systems. To select soil quality indicator variables in sugarcane (Saccharum officinarum L.) production areas that fulfill the criteria of sensitivity to management practices and between-season consistency in the management discrimination, ten composite soil samples (0–10 cm) were collected in July 2005 (rainy season) and again in March 2006 (dry season) from areas under cultivation of organic sugarcane (OS), green sugarcane (GS), burned sugarcane (BS) and from an adjacent native forest (NF) area at Usina Triunfo, Boca da Mata, Alagoas, Brazil. Microbial biomass-C (MBC), total organic C (TOC), soil enzyme activity expressed as the rate of fluorescein diacetate (FDA) hydrolysis, mean weight diameter of water-stable soil aggregates (MWD), and percentage of water-stable macroaggregates (PWSA) were analyzed. Although MBC and TOC were higher in NF than in the cultivated areas, no differences were observed in these C pools between the three sugarcane systems. The response of FDA to the site management was dependent on the sampling time. In the rainy period, the activity followed the order: NF > OS > GS > BS, whereas in the dry season, only NF differed from the other treatments. Irrespective of the sampling time, MWD and PWSA decreased in the order NF > OS = GS > BS. The variables MWD and PWSA are quite sensitive for discriminating between site management histories regardless the sampling season.
基金supported in part by the CT Sea Grant and the Undergraduate Research Initiative of the College of Arts and Sciences, Sacred Heart University
文摘While the four species of horseshoe crabs share many common reproductive traits with respect to their reproductive systems, they do differ with respect to their mating behavior (monogamy vs. polygynandry). Past research has attributed these differences to a number of factors including: spawning densities, operational sex ratios (OSR's), male condition (or age), environmental and/or genetic factors, or a combination thereof. Mating behaviors in the three Asian horseshoe crab species (Tachy-pleus gigas, T. tridentatus, and Carcinoscorpius rotundicauda) with low spawning densities and 1:1 operational sex ratios are typically monogamous. In Limuluspolyphemus, mating behavior is more variable ranging fi'om monogamy to polygynandry. Here we provide evidence, through a long term behavioral study, that variation in mating behavior is influenced by population density in L. polyphemus. Our study population on two beaches in Connecticut (Long Island Sound) have a spawning density 400 times less than that found in Delaware Bay (0.002 females/m2 vs. 0.8 females/m2) but similar operational sex ratios. Between 90%-95% of all spawning females in CT were paired with only one male, thus exhibiting monogamous behavior. In contrast, between 30 and 60% of spawning females in Delaware Bay have more than one mate and produce clutches of eggs with multiple paternities. Male condition played no role in mating behavior in CT populations. We also observed that on average 18% of the females on the spawning beaches are single. These results suggest that population density is an important condition that determines mating behavior. Also, low population density may lead to decreased mate finding ability and lost opportunities for spawning
文摘There are limited data on celiac disease(CD) from India.The limited knowledge about CD in India might be attributed to several factors.The fi rst meeting of the Indian Task Force for Celiac Disease was held in the Asian Institute of Gastroenterology,Hyderabad,India in December 2008.The objectives of the meeting were to focus research on prevalence of CD in the wheat-eating Northern vs the rice-eating Southern Indian population,low-budget serological assays to study the underprivileged population,to involve other medical subspecialties in CD,to suggest proper legislation regarding wheat food labeling,and to organize affordable food substitutes for patients with celiac disease.
文摘Seeking to alleviate and eradicate Bao (the minimum livelihood guarantee system) extreme povertY, the Chinese government has extended Di to the entire rural sector. It has also enhanced agricultural policies and strengthened its promotion of rural socioeconomic development. In more-developed regions of the country, the Di Bao program-in combination with integrated urban and rural social insurance and public services-has significantly reduced rates of poverty and financial vulnerability, and additional employment-promotion policies have created opportunities for Di Bao recipients to achieve incomes above the poverty-line. However, because of the high number of extremely poor households in disproportionately poor areas and the paucity of locally-available financial resources there, the intensity of intervention is still insufficient. Inadequate coordination of policies and shortcomings in the targeting of subsidies have resulted in both under-coverage and welfare-leakage as well. Consequently, in China's efforts to eradicate extreme poverty, increasing the effectiveness of poverty-reduction strategies in poor areas remains a key prioritY.
文摘With the acceleration of urbanization, the lifestyles and living expenses of farmers and urban residents is increasingly more and more similar .However, from the measures in terms of the minimum living guarantee, the level of protection of rural and urban residents really have a large gap. The Third Plenary Session of the 18th Central Committee noted "to promote urban and rural minimum living security system and rural development", "to speed up and improve the social security management system and operate the service system",These tell us that only to realize the integration of urban and rural subsistence allowances, improve the underpinning of the social security system, can we build a moderately prosperous society.
文摘Developing modern agriculture is an important aspect of urban and rural integration. Chintz has adopted a new, highly compatible, multipronged approach. Judgingfrom current agricultural and rural policies, factors like capital, labor and land will continue to interact and revolve. The transformation of China's rural land tenure system is at a critical posifion in the overall strategy of developing tile rural economy. However, rural institutional reform will inevitably be constrained by the path and pattern China's industrialization, urbanization and agricultural modernization take. Creating a new pattern of urban and rural socioeconomic integration requires reform and improvement of rural grassroots governance structure. The interaction and reconsolidation of the factors have again become intertwined with the superstructure of rural society and will inevitably affect the direction and pace of rural grassroots governance structural reJbrm. Protecting the economic interests of farmers while respecting their democratic rights will always be at the heart of agricultural modernization.
文摘Presently, Chinese urban and rural medicare systems differ from each other in many aspects including coverage, payment, and funding patterns, etc, which accounting mainly for the serious situation of the division between urban and rural areas, among different areas and among different communities. The paper will firstly illustrate the purposes and principles of integrating urban and turn/medical insurance systems. Then, with the development of socialist core value--equity, the consideration of the development of the social security system, and the consideration of the strengthening of the rural and urban economy, integrating three main basic health insurance systems is required to take place urgently, In the last part, it provides the strategic development of the inter,ration of the dual svstem.so as to build an uniform social insurance system.
文摘In China, the income tax of enterprise is very different between foreign funded enterprises and other domestic enterprises. It is believed that this discrimination is harmful to the entire economy. So there is a reform in the tax system to build a uniform enterprise income tax. This is a significant reform in China's tax system, so every decision about this have to count the cost and the benefit carefully. The author has introduced the Computable General Equilibrium (CGE) to simulate this new tax system and value its benefit and cost. There are two different models in the paper; they are of different assumptions and for different purposes. Model I is a static CGE model and model II is a Ramsey Dynamic model. The static model is mainly used for comparative static approach to examine how the tax reform will change the endogenous variables. According to the results of the model, more goods will be produced by both of the DFEs and FIEs after the tax reform in the medium and low tax effective tax rate situations. If the nominal tax rates decrease 24.24% (from 33% to 25%), the enterprise income tax will only reduce 19.36% and the total tax revenue will only reduce 1.911%. The dynamic model will concentrate on the costs and benefits during the transition. From the results of the model, a lower tax rate will increase the level of investment, capital stock, capital prices, wage rate and also the growth rates through transition. If the capital tax rates are changed gradually, the fluctuating of transition will be smoothed a little.
文摘Asia has a special significance in China’s neighborhood strategy.Geographically,the Belt and Road Initiative faces the countries of Asia or China’s neighbors in the first place.Asia is clearly marked by an imbalance in and“absence”of regional economic integration.This“absence”is two-fold:it is expressed on the one hand as a lack of unified institutional arrangements for regional economic integration,and on the other as the inability of underdeveloped countries in the region to truly participate in regional economic integration and thereby gain opportunities for development.Compared with the rule-oriented nature of existing regional economic integration mechanisms,the Belt and Road Initiative,as a new type of regional cooperation mechanism,displays an orientation towards development.All existing regional economic integration arrangements,regardless of their form,establish specific rules on access thresholds,the rights and duties of member countries,schedules and roadmaps,dispute resolution mechanisms and so forth.This is not the case for the Belt and Road,which is not predicated on specific rules,but establishes its overall framework by orienting itself towards development.Overall,the development orientation of the Belt and Road is helpful not only in overcoming the inherent defects of Asian regional economic integration,but in responding to the new challenge of anti-globalization.This is an institutional public good that China offers to Asia and to the world.
基金This study is financed by the project of National Natural Science Foundation of China.
文摘China's recent declaration of principles on its exchange rate mechanism has made it very clear that any move should be on China's own initiative; such a move should be sustainable and under control. China has adopted gradualism in the exchange rate reform process. On July 21st, 2005, China changed Renminbi (RMB) pariy (appreciation) by 2 percent, signaling the exchange market reform process. This paper is to study the past history of the crawling-peg of RMB on the US dollar with a view of its future reform. The flexibility provided by the crawling-peg still fits well with China's status quo. However, the flexible mechanism should follow the trend of China's economic development with well-timed parity changes. The extent of the fluctuation band rests upon China's ability to maintain its currency stability to counter future speculation and shocks. Only when the market mechanism is restored in China can an equilibrium RMB exchange rate be reached.