Numerical simulation on the flow fields near the dimpled and the smooth revolution bodies are performed and compared by using SST k-ω turbulence model, to explain the reasons of friction and base drag reductions on t...Numerical simulation on the flow fields near the dimpled and the smooth revolution bodies are performed and compared by using SST k-ω turbulence model, to explain the reasons of friction and base drag reductions on the bionic dimpled surface and the control behaviors of dimpled surface to boundary layer near wall of the revolution body. The simulation results show that the dimpled surface reduces the skin friction drag through reducing the velocity gradient and turbulent intensity, and reduces the base drag through weakening the pumping action on the flow behind the revolution body caused by the external flow; the low speed rotating vortexes in the dimples segregate the external flow and the revolution body; and the low speed rotating vortexes forming in the bottom of dimples can produce negative skin friction.展开更多
Based on the discovery of the SSW stress field of the Earth and Mars, the authors proposed that each of the celestial bodies in the Solar System possesses a consistent stress field along the revolution axis relative t...Based on the discovery of the SSW stress field of the Earth and Mars, the authors proposed that each of the celestial bodies in the Solar System possesses a consistent stress field along the revolution axis relative to their own obliquity of the ecliptic ( ε ).This paper describes a deep going study on the control role of the stress field on the formation of the Tibet plateau.1\ Discovery of the stress filed along the revolution axis of the Earth and Mars (1)Discovery of the four tridimensional tectonic systems in the global SSW stress field [1] :In West China, under the action of this stress field, the alternative WNW\|trending belts of fault uplifts and fault depressions intersect the alternative belts of ENE\|trending sinistral and NNW\|trending dextral conjugate shear\|compressive uplifts and depressions,and then combine with the NNE\|trending tensile fault belt, to form the “uplift on uplift" ,the “third\|order overlapped uplift" ,the“depression in depression” ,the “third\|order sunk depression", and also the composite fault uplifts and fault depressions composed of four or more fault groups. They are produced simultaneously and form the rivers, lakes, basins, mountains and plateaus and show the mirror symmetry in section. This tectonic framework can be observed not only in the Qinghai—Tibet plateau but also in all over China and even on the entire Earth. Therefore, the SSW principal compressive stress is the unified global stress field and its model has already been constructed [1] .展开更多
Revolutions,typical cases of crucial social transformations,cannot be realized successfully without a large number of activists.Therefore,creating conditions favorable for acquiring enough participants should be an im...Revolutions,typical cases of crucial social transformations,cannot be realized successfully without a large number of activists.Therefore,creating conditions favorable for acquiring enough participants should be an important topic of Marxist social science.In particular,this problem includes the “free-ride,” because the benefits of revolutionaries’ activities are gained not only by the activists but also by all other members.The paper analyzes problems such as this one,applying non-cooperative game theory to social dilemma problems.This leads to some interesting results.In this research,the problem of the workers’ choice between unity or freeride is first defined using numerical examples of the gain structure.It is defined again in a more generalized form using other parameters.In so doing,we express both the cost of participating in the movement and the gains from the concession of the ruling class.Because this analysis focuses on the importance of the number of participants,the concession of the ruling class is framed as a function of the number of participants.The results of this analysis revealed that the economic base and superstructure accurately correspond in some game structures but not in others.In other words,the social dilemma presents either as a case of prisoners’ dilemma or as a chicken game.Furthermore,this paper analyzes the influence of group size,and it was revealed that groups with a large number of members,such as a ruled class,find it particularly difficult to unite.This phenomenon is called the “large group dilemma.” In these ways,this research shows that the aforementioned type of game theory can be used to analyze the difficulties and possibilities of social movements.展开更多
The process of modernization accelerates the decline of the rural areas in China pausing malignant changes of the rural culture,such as lack of education and religious chaos and so on.Such cultural crisis in rural are...The process of modernization accelerates the decline of the rural areas in China pausing malignant changes of the rural culture,such as lack of education and religious chaos and so on.Such cultural crisis in rural areas results in incredibility of the public power.As a social class farmers are marginalized.On the contrary,the decline of the rural culture provides the possibility of the rooting of the revolutionary ideas.Led and influenced by the Communist Party of China farmers become the principal part of modernization and revolution and the major driving force and hard core of the new- democratic revolution,having great effect upon the direction of China's modern history.展开更多
The Market Revolution took place in America during the first half of the 19th century,and the new trend of development promoted the transition from a traditional rural society to a market society.The influences brough...The Market Revolution took place in America during the first half of the 19th century,and the new trend of development promoted the transition from a traditional rural society to a market society.The influences brought by the Market Revolution are as follows:the status of the rural women has been improved;the ideas of market and the sense of competition have been strengthened;American economy developed rapidly,and both the domestic and international markets have been broadened.The experiences of the transition from rural society to market society include:government supported the development of commercial agriculture;all sectors of society paid attention to agriculture;the quality of agriculture products was guaranteed;however,the development of agriculture damaged the environment.展开更多
In 2024,the Chinese Meridian Project(CMP)completed its construction,deploying 282 instruments across 31 stations.This achievement not only provides a robust foundation but also serves as a reference template for the I...In 2024,the Chinese Meridian Project(CMP)completed its construction,deploying 282 instruments across 31 stations.This achievement not only provides a robust foundation but also serves as a reference template for the International Meridian Circle Program(IMCP).The IMCP aims to integrate and establish a comprehensive network of ground-based monitoring stations designed to track the propagation of space weather events from the Sun to Earth.Additionally,it monitors various disturbances generated within the Earth system that impact geospace.Over the past two years,significant progress has been made on the IMCP.In particular,the second phase of construction for the China-Brazil Joint Laboratory for Space Weather has been completed,and the North Pole and Southeast Asia networks are under active construction.The 2024 IMCP joint observation campaign was successfully conducted.To facilitate these developments,the scientific program committee of IMCP was established,following the success of 2023 IMCP workshop and the space weather school,which was co-hosted with the Asia-Pacific Space Cooperation Organization(APSCO)and sponsored by Chinese Academy of Sciences(CAS)and Scientific Committee on Solar-Terrestrial Physics(SCOSTEP).Preparations are now underway for the 2024 workshop in collaboration with the National Institute for Space Research(INPE)in Brazil.展开更多
基金Sponsored by the National Natural Science Foundation of China (50635030)the Technology Development Plan of Jilin Province ( 20096032)+1 种基金the Major Program of Science and Technology Development of Jilin Province (09ZDGG001)the Youth Research Start-up Fund of Agriculture Department of Jilin University ( 4305050102K7)
文摘Numerical simulation on the flow fields near the dimpled and the smooth revolution bodies are performed and compared by using SST k-ω turbulence model, to explain the reasons of friction and base drag reductions on the bionic dimpled surface and the control behaviors of dimpled surface to boundary layer near wall of the revolution body. The simulation results show that the dimpled surface reduces the skin friction drag through reducing the velocity gradient and turbulent intensity, and reduces the base drag through weakening the pumping action on the flow behind the revolution body caused by the external flow; the low speed rotating vortexes in the dimples segregate the external flow and the revolution body; and the low speed rotating vortexes forming in the bottom of dimples can produce negative skin friction.
文摘Based on the discovery of the SSW stress field of the Earth and Mars, the authors proposed that each of the celestial bodies in the Solar System possesses a consistent stress field along the revolution axis relative to their own obliquity of the ecliptic ( ε ).This paper describes a deep going study on the control role of the stress field on the formation of the Tibet plateau.1\ Discovery of the stress filed along the revolution axis of the Earth and Mars (1)Discovery of the four tridimensional tectonic systems in the global SSW stress field [1] :In West China, under the action of this stress field, the alternative WNW\|trending belts of fault uplifts and fault depressions intersect the alternative belts of ENE\|trending sinistral and NNW\|trending dextral conjugate shear\|compressive uplifts and depressions,and then combine with the NNE\|trending tensile fault belt, to form the “uplift on uplift" ,the “third\|order overlapped uplift" ,the“depression in depression” ,the “third\|order sunk depression", and also the composite fault uplifts and fault depressions composed of four or more fault groups. They are produced simultaneously and form the rivers, lakes, basins, mountains and plateaus and show the mirror symmetry in section. This tectonic framework can be observed not only in the Qinghai—Tibet plateau but also in all over China and even on the entire Earth. Therefore, the SSW principal compressive stress is the unified global stress field and its model has already been constructed [1] .
文摘Revolutions,typical cases of crucial social transformations,cannot be realized successfully without a large number of activists.Therefore,creating conditions favorable for acquiring enough participants should be an important topic of Marxist social science.In particular,this problem includes the “free-ride,” because the benefits of revolutionaries’ activities are gained not only by the activists but also by all other members.The paper analyzes problems such as this one,applying non-cooperative game theory to social dilemma problems.This leads to some interesting results.In this research,the problem of the workers’ choice between unity or freeride is first defined using numerical examples of the gain structure.It is defined again in a more generalized form using other parameters.In so doing,we express both the cost of participating in the movement and the gains from the concession of the ruling class.Because this analysis focuses on the importance of the number of participants,the concession of the ruling class is framed as a function of the number of participants.The results of this analysis revealed that the economic base and superstructure accurately correspond in some game structures but not in others.In other words,the social dilemma presents either as a case of prisoners’ dilemma or as a chicken game.Furthermore,this paper analyzes the influence of group size,and it was revealed that groups with a large number of members,such as a ruled class,find it particularly difficult to unite.This phenomenon is called the “large group dilemma.” In these ways,this research shows that the aforementioned type of game theory can be used to analyze the difficulties and possibilities of social movements.
文摘The process of modernization accelerates the decline of the rural areas in China pausing malignant changes of the rural culture,such as lack of education and religious chaos and so on.Such cultural crisis in rural areas results in incredibility of the public power.As a social class farmers are marginalized.On the contrary,the decline of the rural culture provides the possibility of the rooting of the revolutionary ideas.Led and influenced by the Communist Party of China farmers become the principal part of modernization and revolution and the major driving force and hard core of the new- democratic revolution,having great effect upon the direction of China's modern history.
基金This paper is a phase achievement of the PhD startup scientific research project of Guizhou Normal University
文摘The Market Revolution took place in America during the first half of the 19th century,and the new trend of development promoted the transition from a traditional rural society to a market society.The influences brought by the Market Revolution are as follows:the status of the rural women has been improved;the ideas of market and the sense of competition have been strengthened;American economy developed rapidly,and both the domestic and international markets have been broadened.The experiences of the transition from rural society to market society include:government supported the development of commercial agriculture;all sectors of society paid attention to agriculture;the quality of agriculture products was guaranteed;however,the development of agriculture damaged the environment.
基金Supported by International Meridian Circle Program Headquarters,China-Brazil Joint Laboratory for Space Weather(Y42347A99S)。
文摘In 2024,the Chinese Meridian Project(CMP)completed its construction,deploying 282 instruments across 31 stations.This achievement not only provides a robust foundation but also serves as a reference template for the International Meridian Circle Program(IMCP).The IMCP aims to integrate and establish a comprehensive network of ground-based monitoring stations designed to track the propagation of space weather events from the Sun to Earth.Additionally,it monitors various disturbances generated within the Earth system that impact geospace.Over the past two years,significant progress has been made on the IMCP.In particular,the second phase of construction for the China-Brazil Joint Laboratory for Space Weather has been completed,and the North Pole and Southeast Asia networks are under active construction.The 2024 IMCP joint observation campaign was successfully conducted.To facilitate these developments,the scientific program committee of IMCP was established,following the success of 2023 IMCP workshop and the space weather school,which was co-hosted with the Asia-Pacific Space Cooperation Organization(APSCO)and sponsored by Chinese Academy of Sciences(CAS)and Scientific Committee on Solar-Terrestrial Physics(SCOSTEP).Preparations are now underway for the 2024 workshop in collaboration with the National Institute for Space Research(INPE)in Brazil.
