Industrial clusters have been an important phenomenon of the global economy. The most important reason for its becoming the focus of people's attention and the popular mode of industry programming is continuous and p...Industrial clusters have been an important phenomenon of the global economy. The most important reason for its becoming the focus of people's attention and the popular mode of industry programming is continuous and powerful competitiveness ,The article analyzes this competitiveness, and points out some problems of China's industrial clusters, which directly affects its current competitiveness and further development. Finally, we propose stone specific measures of those problems.展开更多
The paper studied the competitive power of agricultural products in Heilongjiang Province by analyzing the revealed comparative advantage,and drew the conclution that agricultural products competitive power was decrea...The paper studied the competitive power of agricultural products in Heilongjiang Province by analyzing the revealed comparative advantage,and drew the conclution that agricultural products competitive power was decreasing in Heilongjiang Province.There were three main reasons for this status: firstly,the cost of circulation of agricultural products was increasing;secondly,the commodity rate of agricultural products was low;thirdly,the marketing power of agricultural product was weak because of lacking the ...展开更多
Since the decision of the State Council in 1985 on expanding the export of electromechanical products, China’s exports of electrome-chanical products has freed itself from long fluctuation and realized fast growth. A...Since the decision of the State Council in 1985 on expanding the export of electromechanical products, China’s exports of electrome-chanical products has freed itself from long fluctuation and realized fast growth. According to statistics from the Customs Office, China’s exports of electro-mechanical products in 1995 reached US$43.86 billion, increasing 25 times in 10 years, and becoming China’s first pillar products for export. While achieving fast growth in exports, product mix has also seen sig-展开更多
Under the principle of sustainable development, this paper analyzes the factors influencing the competitive power of scenic spots, and sets up a set of evaluation index system, which considers environmental, ecologica...Under the principle of sustainable development, this paper analyzes the factors influencing the competitive power of scenic spots, and sets up a set of evaluation index system, which considers environmental, ecological, social and economic benefits. According to the characteristic of the inder system, the principal component analysis is adopted to do comprehensive appraisal. In the case study this paper analyzes the competitiveness of scenic spots in Jiangsu province.展开更多
In resent years the entrepreneurial city is a ne w popular concept in the field of the economy and the development of the western cities At present the scholars of our country just begin to research about it. This ess...In resent years the entrepreneurial city is a ne w popular concept in the field of the economy and the development of the western cities At present the scholars of our country just begin to research about it. This essay tries to analyze the connotation and the function of the entrepreneurial city, and also analyzes the function and the mechanism of the improvement of the Competitiveness of the city.展开更多
The Porter Hypothesis,proposed by Michael E.Porter,suggests that stringent environmental regulations can enhance corporate innovation and competitiveness,challenging the traditional view that regulations increase busi...The Porter Hypothesis,proposed by Michael E.Porter,suggests that stringent environmental regulations can enhance corporate innovation and competitiveness,challenging the traditional view that regulations increase business costs.It argues that regulations motivate firms to innovate,leading to improved productivity,cost reductions,and new market opportunities.However,there are proponents and critics in academia regarding the hypothesis.Supporters claim regulations change corporate behavior,reducing agency costs and boosting research and development.Critics argue that if win-win situations exist,businesses would naturally pursue them without regulatory incentives.Key challenges in proving or refuting the hypothesis include its various versions,the difficulty in quantifying innovation and competitiveness,the complex interplay between regulation,innovation,and competitiveness,and the varying impacts across industries and regions.Additionally,the effects may require a long time to manifest,and the hypothesis’s applicability is influenced by evolving environmental policies and market environments.Despite mixed empirical findings,the Porter Hypothesis provides a valuable framework for understanding the relationships among environmental regulation,innovation,and competitiveness,but its validation requires a more comprehensive assessment.展开更多
COVID-19’s global spread has exposed the weakness of biosecurity systems,underlining shortcomings and increasing the difficulty of global governance.Given the dilemma inherent in biotechnology’s prospects and risks,...COVID-19’s global spread has exposed the weakness of biosecurity systems,underlining shortcomings and increasing the difficulty of global governance.Given the dilemma inherent in biotechnology’s prospects and risks,the leadership of biotechnology and biosecurity capability has become a focal point of great power competition.Both the threat of bioterrorism and the risk of the misuse or abuse of biotechnology are urgent and complicated.Due to the lack of verification mechanisms and the dual-nature of biotechnology,biosecurity competition may result in an arms race or military conflict,but major powers can innovate cooperation mechanisms to provide public goods and manage risk.展开更多
Since the end of the Cold War,major powers have avoided direct military confrontation,wary of the devastating consequences of nuclear warfare.Yet the arms race and regional conflicts remain important forms of power co...Since the end of the Cold War,major powers have avoided direct military confrontation,wary of the devastating consequences of nuclear warfare.Yet the arms race and regional conflicts remain important forms of power competition.Nonetheless,in the era of globalization,rapid advancements in new technologies and industries have eclipsed the utility of geopolitical maneuvers and military competition.In today’s world,the great power competition goes beyond the arms race and GDP aggregates.What matters more is the race to innovate and apply new technologies through a complete range of industrial sectors.In a world where technology has a controlling influence,industrial security has become the linchpin of national security.As globalization reshapes the world’s industrial landscape,a country’s economic influence,military might and national security depend increasingly on its industrial structure.National security is contingent upon industrial strength.In the era of globalization,industrial policy,cutting-edge technologies and market size are dominant factors influencing a country’s competitive position.The essence of the great power competition are industrial policies that fully unlock a country’s industrial potential and implementation of the policies.展开更多
Traditional international trade theories seldom consider the pursuit of power as maintaining and enlarging a country's relative strength in the process of interstate competition.However,in the context of great pow...Traditional international trade theories seldom consider the pursuit of power as maintaining and enlarging a country's relative strength in the process of interstate competition.However,in the context of great power competition,the importance of power in the trade between advanced and latecomer countries has become more pronounced.Given this situation,we can establish a tractable and generalized international economic political framework for analyzing great power competition by introducing the power factor into classic two-country trade theory,treating the absolute welfare and relative welfare emphasized by economics and political science respectively as actors'dual objectives,and making use of game theory methods.It can be found that in a two-country game composed of an advanced and a latecomer country,the latter will prefer a strategy of"enhancing its own strength and rectifying its own weak points,"while the former will favor a strategy that""worsens the other's weak points and enhances the other's strengths."Once the technological gap that determines comparative advantage narrows,the advanced country will tend to totally suppress the latecomer and even"decouple"from it.展开更多
The research of international trade and investment concludes that competitive power and comparative advantages of a industry come from the productivity of resource arrangements, which results from division of social l...The research of international trade and investment concludes that competitive power and comparative advantages of a industry come from the productivity of resource arrangements, which results from division of social labor and it’s productivity. The analysis in relationts to the case of China’s mobile telepone industry shows that foreign direct investments, not only produce a series of technology innovation, and improve the use of production sectors, but also promote the system innovation in China. The effects of system innovation in China by FDI will be more important.展开更多
In a new world era, where financial systems are being restructured, manufacturing insight reconsidered and ways of doing business is changing, the foundry industry has to adapt herself to the winds of change by placin...In a new world era, where financial systems are being restructured, manufacturing insight reconsidered and ways of doing business is changing, the foundry industry has to adapt herself to the winds of change by placing all her inputs onto the table and reevaluate them to fit into this new era. The inherent strengths of the foundry industry alone would not be enough to fit in this change process, where careful and intelligent operation of the back offcie and the front office of the foundry should come into the picture. The recent global crisis and previous ones have had positive effects on the improvement of foundry competitiveness by opening opportunities to change and "clean the house". The survival strategies, as well as what actions to be taken for growth and maintaining a strong foot print in this complicated atmosphere, is discussed in several headlines. In the long run, survival of individual foundries depends on well managed orchestration by the "decision makers" of each individual component of the foundry. Sustainability of the whole is the sum of survival capabilities of its components and the management of their harmonization.展开更多
This paper summarizes the features of the new economy in America, and then analyses the differences between the new economy and Chinese economy with trade theories. At the last, this paper concentrates on study of str...This paper summarizes the features of the new economy in America, and then analyses the differences between the new economy and Chinese economy with trade theories. At the last, this paper concentrates on study of strategies for China to develop economic internationalization.展开更多
With stepwise development of Chinese enterprise,management problem is increasingly prominent,especially human resource management issues. Facing international environment of entering into World Trade Organization,the ...With stepwise development of Chinese enterprise,management problem is increasingly prominent,especially human resource management issues. Facing international environment of entering into World Trade Organization,the country accelerates construction pace of human resource management subject in colleges and universities,which provides professional channel for management efficiency and market competition ability of Chinese enterprise,but it is still far from practice. In this paper,the concept,origin and inhibition factors of ingroup preference are elaborated. Based on the visual angle of ingroup preference,started from four dimensions( enterprise incentive system,talent management idea,psychological contract and employee communication consciousness),main problems existing in employee relationship management of modern enterprise are explored. It is specially emphasized that manager often holds the blame in front of dealing with the crisis after contradiction,which is " fatal point" neglected in employee relationship management of modern enterprise. To improve its core competitive power,enterprise must value harmonious relationship with employees.展开更多
Three recent crises,namely the 2008 financial crisis,rising populism and the COVID-19 pandemic,have revealed inherent defects within the liberal international system,the shaky international power structure bemired in ...Three recent crises,namely the 2008 financial crisis,rising populism and the COVID-19 pandemic,have revealed inherent defects within the liberal international system,the shaky international power structure bemired in major power competition,the crumbling post-Cold War world order and a misty future for international politics.Together,institutions,power structures and states are determining the direction of a new international order;with all three variables holding multiple possibilities,the future is far from certain.The shift from old to new world orders usually takes several decades,with the transitional period being the most turbulent and disorderly.Major events can accelerate,precipitate or put these changes to the test.The COVID-19 pandemic in particular has cast significant impacts on the international order,and the disparities between countries in their response to the pandemic will affect international power dynamics and the building of a new world order.展开更多
The new Eurasian Economic Union (EEU) has now become a reality coming into effect today allowing free movement of trade, services and capital. Its treaty was signed on 29 May 2014 by the leaders of Belarus, Kazakhst...The new Eurasian Economic Union (EEU) has now become a reality coming into effect today allowing free movement of trade, services and capital. Its treaty was signed on 29 May 2014 by the leaders of Belarus, Kazakhstan and Russia. EEU has an integrated single market of 176 million people and a gross domestic product (GDP) of over four trillion US Dollars. From the point view of Nye and Keohane's interdepence theory, this trade block formed under Moscow's leadership also begs the question, if the Soviet Union will also reunite and be re-established. Russia seems to look at it not just in economic terms, but as a way to expand Russian influence in the region. The biggest criticism of the union seems to be re-establishment of the crumbled Soviet Union. On the other hand Russia has wanted to launch talks with the newly born EEU despite the Ukraine Crisis. German Chancellor Angele Merkel has supported to establish a common economic space in the Eurasian Region including the focus countries of Eastern Partnership (an EU policy on closer ties with Armenia, Azerbaijan, Belarus, Georgia, Moldova and Ukraine). A new Russia-led blocs as a better partner for the EU than the US could cause to deemphasize new Trans-Atlantic Treaty. Another point, the union is actively seeking to increase trade with East Asia. It commenced talks for official trade cooperation with Association of Southeast Asian Nations (ASEAN). Therefore we can say that EEU includes strategic interests as well as economic interests for its members, especially for Russia. In order to link both Europe and East Asia, Russia seeks to develop its eastern regions to increase its access to Asian markets. Far East markets have become so important for Russia since the European Union and the United States imposed sanctions on Russia following crisis in Ukraine. In this article my aim is to analyze EEU effects on global politics and the World Economic System.展开更多
Prticle-in-cell(PIC) simulations demonstrated that,when the relativistic magnetron with diffraction output(MDO) is applied with a 410 kV voltage pulse,or when the relativistic magnetron with radial output is appli...Prticle-in-cell(PIC) simulations demonstrated that,when the relativistic magnetron with diffraction output(MDO) is applied with a 410 kV voltage pulse,or when the relativistic magnetron with radial output is applied with a 350 kV voltage pulse,electrons emitted from the cathode with high energy will strike the anode block wall.The emitted secondary electrons and backscattered electrons affect the interaction between electrons and RF fields induced by the operating modes,which decreases the output power in the radial output relativistic magnetron by about 15%(10%for the axial output relativistic magnetron),decreases the anode current by about 5%(5%for the axial output relativistic magnetron),and leads to a decrease of electronic efficiency by 8%(6%for the axial output relativistic magnetron).The peak value of the current formed by secondary and backscattered current equals nearly half of the amplitude of the anode current,which may help the growth of parasitic modes when the applied magnetic field is near the critical magnetic field separating neighboring modes.Thus,mode competition becomes more serious.展开更多
The rise of China and the strategic readjustments of the United States catalyzes major changes with four new features for the Asia-Pacific geo-space. A, the Asia-Pacific geo-economic map witnesses a double competitive...The rise of China and the strategic readjustments of the United States catalyzes major changes with four new features for the Asia-Pacific geo-space. A, the Asia-Pacific geo-economic map witnesses a double competitive pattern. B, geo-security space shows a Sino-U.S. competitive and low-cooperative trend. C, geopolitical environment highlights the development model competition. D, the high-tech becomes the new driving force for the Asia-Pacific geo-environment changes. The domestic and overseas concerns with the status and prospects of the Asia-Pacific geo-environment focus on a debates between a resistant and confrontational architecture and a competitive cooperation trend. The author believes that the conditions for the resistant and confrontational pattern are no longer in existence and the regional pattern should be promoted in a direction of competitive cooperation.展开更多
In this work we present experiments by focusing 42 femtosecond laser pulses in air using three differentfocal length lenses: f=100, 30 and 5 cm. For the longest focal length, only the filament, which is aweak plasma c...In this work we present experiments by focusing 42 femtosecond laser pulses in air using three differentfocal length lenses: f=100, 30 and 5 cm. For the longest focal length, only the filament, which is aweak plasma column,is observed. When the shorter focal length lens is used, a high density plasma isgenerated near the geometrical focus and coexists with a weak plasma channel of the filamemt. Under thetightest focusing condition, filamentation is prevented and only a strong plasma volume appears at tehgeometrical focus.展开更多
文摘Industrial clusters have been an important phenomenon of the global economy. The most important reason for its becoming the focus of people's attention and the popular mode of industry programming is continuous and powerful competitiveness ,The article analyzes this competitiveness, and points out some problems of China's industrial clusters, which directly affects its current competitiveness and further development. Finally, we propose stone specific measures of those problems.
基金Supported by Heilongjiang Province Educatinal Committee Science Research Foundation (11512184)
文摘The paper studied the competitive power of agricultural products in Heilongjiang Province by analyzing the revealed comparative advantage,and drew the conclution that agricultural products competitive power was decreasing in Heilongjiang Province.There were three main reasons for this status: firstly,the cost of circulation of agricultural products was increasing;secondly,the commodity rate of agricultural products was low;thirdly,the marketing power of agricultural product was weak because of lacking the ...
文摘Since the decision of the State Council in 1985 on expanding the export of electromechanical products, China’s exports of electrome-chanical products has freed itself from long fluctuation and realized fast growth. According to statistics from the Customs Office, China’s exports of electro-mechanical products in 1995 reached US$43.86 billion, increasing 25 times in 10 years, and becoming China’s first pillar products for export. While achieving fast growth in exports, product mix has also seen sig-
基金Supported by the project(04EYB018)of the philosophical and social science research in the tenth five-year program of Jiangsu province,and the university philosophical and social science project(04SJD790020)of the Education Department of Jiangsu province.
文摘Under the principle of sustainable development, this paper analyzes the factors influencing the competitive power of scenic spots, and sets up a set of evaluation index system, which considers environmental, ecological, social and economic benefits. According to the characteristic of the inder system, the principal component analysis is adopted to do comprehensive appraisal. In the case study this paper analyzes the competitiveness of scenic spots in Jiangsu province.
文摘In resent years the entrepreneurial city is a ne w popular concept in the field of the economy and the development of the western cities At present the scholars of our country just begin to research about it. This essay tries to analyze the connotation and the function of the entrepreneurial city, and also analyzes the function and the mechanism of the improvement of the Competitiveness of the city.
文摘The Porter Hypothesis,proposed by Michael E.Porter,suggests that stringent environmental regulations can enhance corporate innovation and competitiveness,challenging the traditional view that regulations increase business costs.It argues that regulations motivate firms to innovate,leading to improved productivity,cost reductions,and new market opportunities.However,there are proponents and critics in academia regarding the hypothesis.Supporters claim regulations change corporate behavior,reducing agency costs and boosting research and development.Critics argue that if win-win situations exist,businesses would naturally pursue them without regulatory incentives.Key challenges in proving or refuting the hypothesis include its various versions,the difficulty in quantifying innovation and competitiveness,the complex interplay between regulation,innovation,and competitiveness,and the varying impacts across industries and regions.Additionally,the effects may require a long time to manifest,and the hypothesis’s applicability is influenced by evolving environmental policies and market environments.Despite mixed empirical findings,the Porter Hypothesis provides a valuable framework for understanding the relationships among environmental regulation,innovation,and competitiveness,but its validation requires a more comprehensive assessment.
基金supported by the National Natural Science Foundation of China (Grant No.19CGJ004)。
文摘COVID-19’s global spread has exposed the weakness of biosecurity systems,underlining shortcomings and increasing the difficulty of global governance.Given the dilemma inherent in biotechnology’s prospects and risks,the leadership of biotechnology and biosecurity capability has become a focal point of great power competition.Both the threat of bioterrorism and the risk of the misuse or abuse of biotechnology are urgent and complicated.Due to the lack of verification mechanisms and the dual-nature of biotechnology,biosecurity competition may result in an arms race or military conflict,but major powers can innovate cooperation mechanisms to provide public goods and manage risk.
文摘Since the end of the Cold War,major powers have avoided direct military confrontation,wary of the devastating consequences of nuclear warfare.Yet the arms race and regional conflicts remain important forms of power competition.Nonetheless,in the era of globalization,rapid advancements in new technologies and industries have eclipsed the utility of geopolitical maneuvers and military competition.In today’s world,the great power competition goes beyond the arms race and GDP aggregates.What matters more is the race to innovate and apply new technologies through a complete range of industrial sectors.In a world where technology has a controlling influence,industrial security has become the linchpin of national security.As globalization reshapes the world’s industrial landscape,a country’s economic influence,military might and national security depend increasingly on its industrial structure.National security is contingent upon industrial strength.In the era of globalization,industrial policy,cutting-edge technologies and market size are dominant factors influencing a country’s competitive position.The essence of the great power competition are industrial policies that fully unlock a country’s industrial potential and implementation of the policies.
文摘Traditional international trade theories seldom consider the pursuit of power as maintaining and enlarging a country's relative strength in the process of interstate competition.However,in the context of great power competition,the importance of power in the trade between advanced and latecomer countries has become more pronounced.Given this situation,we can establish a tractable and generalized international economic political framework for analyzing great power competition by introducing the power factor into classic two-country trade theory,treating the absolute welfare and relative welfare emphasized by economics and political science respectively as actors'dual objectives,and making use of game theory methods.It can be found that in a two-country game composed of an advanced and a latecomer country,the latter will prefer a strategy of"enhancing its own strength and rectifying its own weak points,"while the former will favor a strategy that""worsens the other's weak points and enhances the other's strengths."Once the technological gap that determines comparative advantage narrows,the advanced country will tend to totally suppress the latecomer and even"decouple"from it.
文摘The research of international trade and investment concludes that competitive power and comparative advantages of a industry come from the productivity of resource arrangements, which results from division of social labor and it’s productivity. The analysis in relationts to the case of China’s mobile telepone industry shows that foreign direct investments, not only produce a series of technology innovation, and improve the use of production sectors, but also promote the system innovation in China. The effects of system innovation in China by FDI will be more important.
文摘In a new world era, where financial systems are being restructured, manufacturing insight reconsidered and ways of doing business is changing, the foundry industry has to adapt herself to the winds of change by placing all her inputs onto the table and reevaluate them to fit into this new era. The inherent strengths of the foundry industry alone would not be enough to fit in this change process, where careful and intelligent operation of the back offcie and the front office of the foundry should come into the picture. The recent global crisis and previous ones have had positive effects on the improvement of foundry competitiveness by opening opportunities to change and "clean the house". The survival strategies, as well as what actions to be taken for growth and maintaining a strong foot print in this complicated atmosphere, is discussed in several headlines. In the long run, survival of individual foundries depends on well managed orchestration by the "decision makers" of each individual component of the foundry. Sustainability of the whole is the sum of survival capabilities of its components and the management of their harmonization.
文摘This paper summarizes the features of the new economy in America, and then analyses the differences between the new economy and Chinese economy with trade theories. At the last, this paper concentrates on study of strategies for China to develop economic internationalization.
文摘With stepwise development of Chinese enterprise,management problem is increasingly prominent,especially human resource management issues. Facing international environment of entering into World Trade Organization,the country accelerates construction pace of human resource management subject in colleges and universities,which provides professional channel for management efficiency and market competition ability of Chinese enterprise,but it is still far from practice. In this paper,the concept,origin and inhibition factors of ingroup preference are elaborated. Based on the visual angle of ingroup preference,started from four dimensions( enterprise incentive system,talent management idea,psychological contract and employee communication consciousness),main problems existing in employee relationship management of modern enterprise are explored. It is specially emphasized that manager often holds the blame in front of dealing with the crisis after contradiction,which is " fatal point" neglected in employee relationship management of modern enterprise. To improve its core competitive power,enterprise must value harmonious relationship with employees.
文摘Three recent crises,namely the 2008 financial crisis,rising populism and the COVID-19 pandemic,have revealed inherent defects within the liberal international system,the shaky international power structure bemired in major power competition,the crumbling post-Cold War world order and a misty future for international politics.Together,institutions,power structures and states are determining the direction of a new international order;with all three variables holding multiple possibilities,the future is far from certain.The shift from old to new world orders usually takes several decades,with the transitional period being the most turbulent and disorderly.Major events can accelerate,precipitate or put these changes to the test.The COVID-19 pandemic in particular has cast significant impacts on the international order,and the disparities between countries in their response to the pandemic will affect international power dynamics and the building of a new world order.
文摘The new Eurasian Economic Union (EEU) has now become a reality coming into effect today allowing free movement of trade, services and capital. Its treaty was signed on 29 May 2014 by the leaders of Belarus, Kazakhstan and Russia. EEU has an integrated single market of 176 million people and a gross domestic product (GDP) of over four trillion US Dollars. From the point view of Nye and Keohane's interdepence theory, this trade block formed under Moscow's leadership also begs the question, if the Soviet Union will also reunite and be re-established. Russia seems to look at it not just in economic terms, but as a way to expand Russian influence in the region. The biggest criticism of the union seems to be re-establishment of the crumbled Soviet Union. On the other hand Russia has wanted to launch talks with the newly born EEU despite the Ukraine Crisis. German Chancellor Angele Merkel has supported to establish a common economic space in the Eurasian Region including the focus countries of Eastern Partnership (an EU policy on closer ties with Armenia, Azerbaijan, Belarus, Georgia, Moldova and Ukraine). A new Russia-led blocs as a better partner for the EU than the US could cause to deemphasize new Trans-Atlantic Treaty. Another point, the union is actively seeking to increase trade with East Asia. It commenced talks for official trade cooperation with Association of Southeast Asian Nations (ASEAN). Therefore we can say that EEU includes strategic interests as well as economic interests for its members, especially for Russia. In order to link both Europe and East Asia, Russia seeks to develop its eastern regions to increase its access to Asian markets. Far East markets have become so important for Russia since the European Union and the United States imposed sanctions on Russia following crisis in Ukraine. In this article my aim is to analyze EEU effects on global politics and the World Economic System.
基金supported by National Natural Science Foundation of China(No.61302010)the Foundation of Science and Technology on High Power Microwave Laboratory,Central University Foundation(2013KW07)Work at the University of New Mexico in USA was supportedby ONR Grant N00014-13-1-0565
文摘Prticle-in-cell(PIC) simulations demonstrated that,when the relativistic magnetron with diffraction output(MDO) is applied with a 410 kV voltage pulse,or when the relativistic magnetron with radial output is applied with a 350 kV voltage pulse,electrons emitted from the cathode with high energy will strike the anode block wall.The emitted secondary electrons and backscattered electrons affect the interaction between electrons and RF fields induced by the operating modes,which decreases the output power in the radial output relativistic magnetron by about 15%(10%for the axial output relativistic magnetron),decreases the anode current by about 5%(5%for the axial output relativistic magnetron),and leads to a decrease of electronic efficiency by 8%(6%for the axial output relativistic magnetron).The peak value of the current formed by secondary and backscattered current equals nearly half of the amplitude of the anode current,which may help the growth of parasitic modes when the applied magnetic field is near the critical magnetic field separating neighboring modes.Thus,mode competition becomes more serious.
文摘The rise of China and the strategic readjustments of the United States catalyzes major changes with four new features for the Asia-Pacific geo-space. A, the Asia-Pacific geo-economic map witnesses a double competitive pattern. B, geo-security space shows a Sino-U.S. competitive and low-cooperative trend. C, geopolitical environment highlights the development model competition. D, the high-tech becomes the new driving force for the Asia-Pacific geo-environment changes. The domestic and overseas concerns with the status and prospects of the Asia-Pacific geo-environment focus on a debates between a resistant and confrontational architecture and a competitive cooperation trend. The author believes that the conditions for the resistant and confrontational pattern are no longer in existence and the regional pattern should be promoted in a direction of competitive cooperation.
文摘In this work we present experiments by focusing 42 femtosecond laser pulses in air using three differentfocal length lenses: f=100, 30 and 5 cm. For the longest focal length, only the filament, which is aweak plasma column,is observed. When the shorter focal length lens is used, a high density plasma isgenerated near the geometrical focus and coexists with a weak plasma channel of the filamemt. Under thetightest focusing condition, filamentation is prevented and only a strong plasma volume appears at tehgeometrical focus.