Super rice is an essendal part of China＇s rice production. Through survey on actual situation of 1568 households of rice growers in Heilongjiang, Hunan and Zhejiang provinces, this paper focused on influence of super...Super rice is an essendal part of China＇s rice production. Through survey on actual situation of 1568 households of rice growers in Heilongjiang, Hunan and Zhejiang provinces, this paper focused on influence of super rice development on increase of China＇s grain yield, influence on increase of rice growers＇ economic in- come, difference in production cost and profit between the North and the South, as well as profit percentage of super rice in production, processing, and sales. It obtained following results： rice price determines rice growers＇ income; expansion of super rice extension area plays a great role in increase of China＇s grain yield; by 2015 and 2020, keeping the yield of other crops not changed, merely the extension of super rice can increase grain for 5 million tons and 11 million tons separately; super rice significantly increases rice growers＇ economic income; for production cost of super rice, the South is higher than the North, and the profit ratio of cost is up to 35.54% on average; with respect of profit in production, processing, and sales, the ratio is 1：2：1.5; with the yield of other crops unchanged, every increase of 1% in area percentage of super rice to rice will additionally produce 1 million tons of grain for China, which is equivalent to saving the yield of 133 300 hm2 farmland and can additional feed 3.5 million people. In view of importance of super rice production, at the same time of strengthening research on super rice variety, it is required to accelerate expanding production area of super rice in suitable areas. Since the development of super rice can support China＇s ration demand of increasing population, China should make effort to realize ＂one yuan for one mu＂ financial subsidy for super rice of main grain production provinces and counties. Besides, China should establish special financial plan for extension of super rice.展开更多
Carcinoma of the esophagus is an aggressive and lethal malignancy with an increasing incidence worldwide.Incidence rates vary internationally,with the highest rates found in Southern and Eastern Africa and Eastern Asi...Carcinoma of the esophagus is an aggressive and lethal malignancy with an increasing incidence worldwide.Incidence rates vary internationally,with the highest rates found in Southern and Eastern Africa and Eastern Asia,and the lowest in Western and Middle Africa and Central America.Patients with locally advanced disease face a poor prognosis,with 5-year survival rates ranging from 15%-34%.Recent clinical trials have evaluated different strategies for management of locoregional cancer;however,because of stage migration and changes in disease epidemiology,applying these trials to clinical practice has become a daunting task.We searched Medline and conference abstracts for randomized studies published in the last 3 decades.We restricted our search to articles published in English.Neoadjuvant chemoradiotherapy followed by surgical resection is an accepted standard of care in the United States.Esophagectomy remains an essential component of treatment and can lead to improved overall survival,especially when performed at high volume institutions.The role of adjuvant chemotherapy following curative resection is still unclear.External beam radiation therapy alone is considered palliative and is typically reserved for patients with a poor performance status.展开更多
Consensus tracking control problems for single-integrator dynamics of multi-agent systems with switching topology are investigated. In order to design effective consensus tracking protocols for a more general class of...Consensus tracking control problems for single-integrator dynamics of multi-agent systems with switching topology are investigated. In order to design effective consensus tracking protocols for a more general class of networks, which are aimed at ensuring that the concerned states of agents converge to a constant or time-varying reference state, new consensus tracking protocols with a constant and time-varying reference state are proposed, respectively. Particularly, by contrast with spanning tree, an improved condition of switching interaction topology is presented. And then, convergence analysis of two consensus tracking protocols is provided by Lyapunov stability theory. Moreover, consensus tracking protocol with a time-varying reference state is extended to achieve the fbrmation control. By introducing formation structure set, each agent can gain its individual desired trajectory. Finally, several simulations are worked out to illustrate the effectiveness of theoretical results. The test results show that the states of agents can converge to a desired constant or time-varying reference state. In addition, by selecting appropriate structure set, agents can maintain the expected formation under random switching interaction topologies.展开更多
A theoretical protocol of quantum dialogue is proposed,which uses a class of three-photon W states asquantum channel.After two-step security check,four-bit secret message can be transmitted to each other by transmitti...A theoretical protocol of quantum dialogue is proposed,which uses a class of three-photon W states asquantum channel.After two-step security check,four-bit secret message can be transmitted to each other by transmittingof single photon with the aid of two-bit classical information.展开更多
The aim of this paper is to reveal the mechanism of compromise and change in coordination where players agree in general but disagree on coordination methods. When players agree on the need to collaborate but are in c...The aim of this paper is to reveal the mechanism of compromise and change in coordination where players agree in general but disagree on coordination methods. When players agree on the need to collaborate but are in conflict regarding the specific method, one player must always compromise. This situation is known as the Battle of the Sexes in game theory. It has ever been believed that if an agreement is reached under such circumstances, the players do not have the incentive to withdraw from the agreement. However, this study shows that this belief is not always true if the players were able to revise the outcome of their negotiations later. The wide-ranging fields use game theories for their analysis frameworks to analyze the success or failure of coordination. However, comparing with the possibility of betrayal illustrated as a well-known Prisoner Dilemma, it has been rare to discuss conflict regarding the specific method of coordination, although such situations are often observed in today＇s interdependent real world. The repeated Battle of the Sexes games presented in this study would be a useful framework to analyze conflict regarding the specific method of coordination.展开更多
On June 19,the“Amman Declaration”was released at the second Entrepreneur Conference of China-Arab Cooperation Forum,which lasted two days in Amman,capital city of Jordan.Some one thousand business representatives,co...On June 19,the“Amman Declaration”was released at the second Entrepreneur Conference of China-Arab Cooperation Forum,which lasted two days in Amman,capital city of Jordan.Some one thousand business representatives,coming from China and 16 Arabian countries,have reached a unanimous consensus that China-Arab bilateral economic and trade cooperation should be reinforced based on mutual respect as well as equality and mutual benefits.展开更多
This work aims at developing the actor-to-actor （A2A） relationship concept in service contexts enhancing the contribution of the systems theories. The most recent progresses related to the research on the service, a...This work aims at developing the actor-to-actor （A2A） relationship concept in service contexts enhancing the contribution of the systems theories. The most recent progresses related to the research on the service, as a matter of fact, highlight how the nowadays co-creation processes are key elements in each service context. Both the Service Science （SS） and the Service Dominant （S-D） logic analyse the importance of the role played by the numerousness of actors involved in the service exchange because of the resources held （and released） and the contribution they can offer. System theories, and in particular the Viable System Approach, offer the possibility of an holistic perspective able to re-interpret the same characterizing mechanisms of the value co-creation. In the following parts of the work it will presented a conceptual analysis based on the contribution of the VSA, the SS and the S-D logic, whose scientific proposals will be developed and critically analysed in order to verify the proposition coherence in terms of A2A relationships within the value co-creation process. The relational perspective of the Service Eco-systems shows a view open to network in relation to economic and social actors, where each organization can be considered as an actor because it is actively committed in the value co-creation development, going beyond the difference between the user, the producer, or the exchange facilitator. Therefore, the contribution proposes some progresses compared with the business to business （B2B） approach and literature, through the introduction of the new A2A interaction concept within the service context for the indistinct role that the actors play in the value co-creation process. In this perspective, the contribution introduces the research line focused on the service, giving attention, afterwards, to the service system context, in order to analyse the features of these systems with the specific goal of identifying its peculiarity. The contribution proceed with the presentation of the systems thinking, and in particular the VSA contribution, directed toward the description of the gaps that the authors identify in the present research attempting to offer some orientations for the comprehension and the improvement of the service systems and of their planning and management implications. The contribution finally proposes an integrated interpretation of the several emerging paradigms （VSA, SS and S-D logic） seeking an in-depth-analysis of the A2A relationships in the service contexts.展开更多
This paper reports a study on a Chinese English major＇s argumentative English writings focusing on the development of her thinking capacities and factors that facilitate or constrain such development. The data came f...This paper reports a study on a Chinese English major＇s argumentative English writings focusing on the development of her thinking capacities and factors that facilitate or constrain such development. The data came from three sources： her essays, reflective journals, and my semi-structured interviews with her. Major findings can be summed up as follows： 1） at the initial stage, the participant was weak in rational thinking; 2） as she had more writing practice, she made progress in ideas and organization of ideas but not in expression of ideas; and 3） factors facilitating or constraining her development primarily include language input, cultural identification, teacher feedback and motivation.展开更多
This paper investigates developmental patterns of metadiscourse use in Chinese students’EAP writing in an English medium university,in comparison with English majors’EFL writing in mainstream state universities and ...This paper investigates developmental patterns of metadiscourse use in Chinese students’EAP writing in an English medium university,in comparison with English majors’EFL writing in mainstream state universities and L1 student writing in UK universities.Taking a longitudinal and cross-contextual perspective,the study explores corpora of L1 and L2 student writing gathered from three sources:EAP essays written by Chinese undergraduate students at an English Medium Instruction(EMI)university;argumentative essays written by English majors in the Written English Corpus of Chinese Learners(WECCL);and academic essays of English L1 students from the British Academic Written English(BAWE)corpus.Hyland’s(2005 a)model of metadiscourse was adopted to identify interactive and interactional devices in each corpus,and results were compared between different levels as well as across the corpora to reveal developmental features.Findings show marked differences in metadiscourse use between Chinese EMI students’EAP essays and English major students’EFL essays in mainstream state universities,whereas a similar pattern of use occurred in EAP essays and English L1 student academic essays.Significant changes were also found between different year levels in two L2 essay corpora.The findings suggest that metadiscourse use in L2 writing had developmental trajectories distinctive to different institutional contexts,with EAP instruction in the EMI institution having mixed effects on Chinese students’awareness and use of metadiscourse in essay writing.展开更多
This special issue of SCIENCE CHINA Mathematics commemorates the 7th International Conference on Representation Theory(ICRT VII)held at Huaqiao University,Xiamen,China from July 18 to July 23,2016.This 5-day conferenc...This special issue of SCIENCE CHINA Mathematics commemorates the 7th International Conference on Representation Theory(ICRT VII)held at Huaqiao University,Xiamen,China from July 18 to July 23,2016.This 5-day conference is devoted to the representation theory of algebraic groups,quantum groups and related finite groups and algebras.More than 80 experts and students from over 8 countries and regions attended this international conference.展开更多
基金Supported by Super Rice Program for Agricultural Scientific&Technological Innovation Project of Chinese Academy of Agricultural SciencesSpecial Project of Public Welfare Industry of Ministry of Agriculture(201203029)Special Project for Construction of Modern Agricultural Industrial Technology System(CARS-01-09B)~~
文摘Super rice is an essendal part of China＇s rice production. Through survey on actual situation of 1568 households of rice growers in Heilongjiang, Hunan and Zhejiang provinces, this paper focused on influence of super rice development on increase of China＇s grain yield, influence on increase of rice growers＇ economic in- come, difference in production cost and profit between the North and the South, as well as profit percentage of super rice in production, processing, and sales. It obtained following results： rice price determines rice growers＇ income; expansion of super rice extension area plays a great role in increase of China＇s grain yield; by 2015 and 2020, keeping the yield of other crops not changed, merely the extension of super rice can increase grain for 5 million tons and 11 million tons separately; super rice significantly increases rice growers＇ economic income; for production cost of super rice, the South is higher than the North, and the profit ratio of cost is up to 35.54% on average; with respect of profit in production, processing, and sales, the ratio is 1：2：1.5; with the yield of other crops unchanged, every increase of 1% in area percentage of super rice to rice will additionally produce 1 million tons of grain for China, which is equivalent to saving the yield of 133 300 hm2 farmland and can additional feed 3.5 million people. In view of importance of super rice production, at the same time of strengthening research on super rice variety, it is required to accelerate expanding production area of super rice in suitable areas. Since the development of super rice can support China＇s ration demand of increasing population, China should make effort to realize ＂one yuan for one mu＂ financial subsidy for super rice of main grain production provinces and counties. Besides, China should establish special financial plan for extension of super rice.
文摘Carcinoma of the esophagus is an aggressive and lethal malignancy with an increasing incidence worldwide.Incidence rates vary internationally,with the highest rates found in Southern and Eastern Africa and Eastern Asia,and the lowest in Western and Middle Africa and Central America.Patients with locally advanced disease face a poor prognosis,with 5-year survival rates ranging from 15%-34%.Recent clinical trials have evaluated different strategies for management of locoregional cancer;however,because of stage migration and changes in disease epidemiology,applying these trials to clinical practice has become a daunting task.We searched Medline and conference abstracts for randomized studies published in the last 3 decades.We restricted our search to articles published in English.Neoadjuvant chemoradiotherapy followed by surgical resection is an accepted standard of care in the United States.Esophagectomy remains an essential component of treatment and can lead to improved overall survival,especially when performed at high volume institutions.The role of adjuvant chemotherapy following curative resection is still unclear.External beam radiation therapy alone is considered palliative and is typically reserved for patients with a poor performance status.
基金Projects(61075065,60774045) supported by the National Natural Science Foundation of ChinaProject supported by the Graduate Degree Thesis Innovation Foundation of Central South University,China
文摘Consensus tracking control problems for single-integrator dynamics of multi-agent systems with switching topology are investigated. In order to design effective consensus tracking protocols for a more general class of networks, which are aimed at ensuring that the concerned states of agents converge to a constant or time-varying reference state, new consensus tracking protocols with a constant and time-varying reference state are proposed, respectively. Particularly, by contrast with spanning tree, an improved condition of switching interaction topology is presented. And then, convergence analysis of two consensus tracking protocols is provided by Lyapunov stability theory. Moreover, consensus tracking protocol with a time-varying reference state is extended to achieve the fbrmation control. By introducing formation structure set, each agent can gain its individual desired trajectory. Finally, several simulations are worked out to illustrate the effectiveness of theoretical results. The test results show that the states of agents can converge to a desired constant or time-varying reference state. In addition, by selecting appropriate structure set, agents can maintain the expected formation under random switching interaction topologies.
基金Supported by the National Natural Science Foundation of China under Grant No.10704011the Research Programs of the Educational Office of Liaoning Province under Grant No.2008006
文摘A theoretical protocol of quantum dialogue is proposed,which uses a class of three-photon W states asquantum channel.After two-step security check,four-bit secret message can be transmitted to each other by transmittingof single photon with the aid of two-bit classical information.
文摘The aim of this paper is to reveal the mechanism of compromise and change in coordination where players agree in general but disagree on coordination methods. When players agree on the need to collaborate but are in conflict regarding the specific method, one player must always compromise. This situation is known as the Battle of the Sexes in game theory. It has ever been believed that if an agreement is reached under such circumstances, the players do not have the incentive to withdraw from the agreement. However, this study shows that this belief is not always true if the players were able to revise the outcome of their negotiations later. The wide-ranging fields use game theories for their analysis frameworks to analyze the success or failure of coordination. However, comparing with the possibility of betrayal illustrated as a well-known Prisoner Dilemma, it has been rare to discuss conflict regarding the specific method of coordination, although such situations are often observed in today＇s interdependent real world. The repeated Battle of the Sexes games presented in this study would be a useful framework to analyze conflict regarding the specific method of coordination.
文摘On June 19,the“Amman Declaration”was released at the second Entrepreneur Conference of China-Arab Cooperation Forum,which lasted two days in Amman,capital city of Jordan.Some one thousand business representatives,coming from China and 16 Arabian countries,have reached a unanimous consensus that China-Arab bilateral economic and trade cooperation should be reinforced based on mutual respect as well as equality and mutual benefits.
文摘This work aims at developing the actor-to-actor （A2A） relationship concept in service contexts enhancing the contribution of the systems theories. The most recent progresses related to the research on the service, as a matter of fact, highlight how the nowadays co-creation processes are key elements in each service context. Both the Service Science （SS） and the Service Dominant （S-D） logic analyse the importance of the role played by the numerousness of actors involved in the service exchange because of the resources held （and released） and the contribution they can offer. System theories, and in particular the Viable System Approach, offer the possibility of an holistic perspective able to re-interpret the same characterizing mechanisms of the value co-creation. In the following parts of the work it will presented a conceptual analysis based on the contribution of the VSA, the SS and the S-D logic, whose scientific proposals will be developed and critically analysed in order to verify the proposition coherence in terms of A2A relationships within the value co-creation process. The relational perspective of the Service Eco-systems shows a view open to network in relation to economic and social actors, where each organization can be considered as an actor because it is actively committed in the value co-creation development, going beyond the difference between the user, the producer, or the exchange facilitator. Therefore, the contribution proposes some progresses compared with the business to business （B2B） approach and literature, through the introduction of the new A2A interaction concept within the service context for the indistinct role that the actors play in the value co-creation process. In this perspective, the contribution introduces the research line focused on the service, giving attention, afterwards, to the service system context, in order to analyse the features of these systems with the specific goal of identifying its peculiarity. The contribution proceed with the presentation of the systems thinking, and in particular the VSA contribution, directed toward the description of the gaps that the authors identify in the present research attempting to offer some orientations for the comprehension and the improvement of the service systems and of their planning and management implications. The contribution finally proposes an integrated interpretation of the several emerging paradigms （VSA, SS and S-D logic） seeking an in-depth-analysis of the A2A relationships in the service contexts.
基金sponsored by the Social Science Planning Project from Beijing Municipal Commission of Education(SM201310038009)
文摘This paper reports a study on a Chinese English major＇s argumentative English writings focusing on the development of her thinking capacities and factors that facilitate or constrain such development. The data came from three sources： her essays, reflective journals, and my semi-structured interviews with her. Major findings can be summed up as follows： 1） at the initial stage, the participant was weak in rational thinking; 2） as she had more writing practice, she made progress in ideas and organization of ideas but not in expression of ideas; and 3） factors facilitating or constraining her development primarily include language input, cultural identification, teacher feedback and motivation.
基金supported by Research Development Fund of Xi’an Jiaotong-Liverpool University and Jiangsu Ministry of Education Philosophy and Social Sciences Funding Scheme.
文摘This paper investigates developmental patterns of metadiscourse use in Chinese students’EAP writing in an English medium university,in comparison with English majors’EFL writing in mainstream state universities and L1 student writing in UK universities.Taking a longitudinal and cross-contextual perspective,the study explores corpora of L1 and L2 student writing gathered from three sources:EAP essays written by Chinese undergraduate students at an English Medium Instruction(EMI)university;argumentative essays written by English majors in the Written English Corpus of Chinese Learners(WECCL);and academic essays of English L1 students from the British Academic Written English(BAWE)corpus.Hyland’s(2005 a)model of metadiscourse was adopted to identify interactive and interactional devices in each corpus,and results were compared between different levels as well as across the corpora to reveal developmental features.Findings show marked differences in metadiscourse use between Chinese EMI students’EAP essays and English major students’EFL essays in mainstream state universities,whereas a similar pattern of use occurred in EAP essays and English L1 student academic essays.Significant changes were also found between different year levels in two L2 essay corpora.The findings suggest that metadiscourse use in L2 writing had developmental trajectories distinctive to different institutional contexts,with EAP instruction in the EMI institution having mixed effects on Chinese students’awareness and use of metadiscourse in essay writing.
文摘This special issue of SCIENCE CHINA Mathematics commemorates the 7th International Conference on Representation Theory(ICRT VII)held at Huaqiao University,Xiamen,China from July 18 to July 23,2016.This 5-day conference is devoted to the representation theory of algebraic groups,quantum groups and related finite groups and algebras.More than 80 experts and students from over 8 countries and regions attended this international conference.
