A new C-glycosylflavone, named panzhihuacycaside (1), was isolated from the leaves of Cycas panzhihuaensis L. Zhou et S. Y. Yang (Cycadaceae) along with 2,3-dihydrohinokiflavone (2), 5,5',7,7', 4',4'&#...A new C-glycosylflavone, named panzhihuacycaside (1), was isolated from the leaves of Cycas panzhihuaensis L. Zhou et S. Y. Yang (Cycadaceae) along with 2,3-dihydrohinokiflavone (2), 5,5',7,7', 4',4''-hexahydroxy-(2',8')-biflavone (3), vanillic acid (4), P-sitosterol (5) and daucosterol (6). Their structures were elucidated by spectral and chemical evidence.展开更多
The growing attention on urban tourism was very widespread. There are two angles to study urban tourism: supply-side and demand-side. And the supply-side of the tourism remains very important. The RBD (Recreation Busi...The growing attention on urban tourism was very widespread. There are two angles to study urban tourism: supply-side and demand-side. And the supply-side of the tourism remains very important. The RBD (Recreation Business District) is a useful framework to understand the components of urban tourism and how they fit together. The paper begins with a review on the RBD and the spatial structure of tourism in urban areas and then attempts to develop a more general understanding of the spatial structure evolution of RBDs in a tourist-historic city-Suzhou. The spatial structures and functions of the RBDs in Suzhou are examined, based on field observations, interviews with city officials and industry leaders, and a review of available documents. The urban tourism of Suzhou has developed in a range of contexts, that various types of RBDs have emerged as a result of different urban development strategies. The spatial structure has evolved from the past "Single-cored Structure" to "Double-cored Structure" at present, and then to "Chain Structure" in the future. The spatial form and evolution of RBD in Suzhou are closely relative with its urban spatial expansion. Urban area dispersal is the prerequisite of the emergence of the RBD. Planning and constructing the RBD becomes a new impetus to urban growth or renewal. Finally, a number of strategies for planning and developing the RBD in Suzhou are suggested. The different RBDs should adopt different strategies. Intensification can be the possible strategy for the RBDs in the ancient city. Accreting with the urban theme park or engrafting on the Jinji Lake is suggested respectively for the RBD in the Suzhou New District and the Suzhou Industrial Park.展开更多
The transmission of science and technology from the Soviet Union to People’s Republic of China in the mid-twentieth century is an important research area of contemporary history of science and technology.This paper t...The transmission of science and technology from the Soviet Union to People’s Republic of China in the mid-twentieth century is an important research area of contemporary history of science and technology.This paper takes the construction of the cyclotron in Lanzhou,China as the case to discuss the characteristics of technology transfer from the Soviet Union to China.The review of extensive archives reveals that the construction of cyclotron took place in the framework of China’s nuclear weapons development.Although the transmission of science and technology from the Soviet Union to China fit into the one-way transmission-reception model in general,both the Chinese demand and the Soviet response had key influences on the transmission.In the early cyclotron construction,the Chinese side relied on the Soviets,and the mode of the cooperation between Soviet and Chinese engineers can be described as one of expertstudent.In the early 1960 s,the relationship between China and the Soviet Union broke down.The Soviet engineers were required to withdraw with the technical data,which created conflicts in the roles played by the Soviet engineers,most of whom chose to set the sense of professional responsibility as their highest priority.After the departure of the Soviet experts,Chinese physicists played the leading role in the project,using scientific knowledge they had,relying on the technical materials left by Soviet experts,and cooperating fully with local engineers,thus completing the cyclotron.This case can provide us with valuable clues for the understanding of transnational history of science and technology.The seemingly one-way transmission-reception model is actually influenced by the needs of both sides.While the transnational flow of knowledge is inevitably affected by political factors from both sides,the process is far more complex than it appears.展开更多
This paper is a report of a survey study of secondary school students' EFL learning motivation in North Jiangsu. Several motivational theories other than Gardner's traditional social-psychological approach hav...This paper is a report of a survey study of secondary school students' EFL learning motivation in North Jiangsu. Several motivational theories other than Gardner's traditional social-psychological approach have been exploited in the design of the questionnaire in the hope of better describing EFL learning motivation in a situation-specific context from different perspectives and checking the validity of various motivational theories in explaining EFL learning motivation in China.展开更多
Seen from the perspective of the relationship between China and the Cold War, the process of normalization of Sino-Soviet relations was one by which China gradually shifted its foreign policy from a Cold War strategic...Seen from the perspective of the relationship between China and the Cold War, the process of normalization of Sino-Soviet relations was one by which China gradually shifted its foreign policy from a Cold War strategic framework to new diplomatic ideas shaped and developed by Chinese policy makers in the course of reform and opening up. In the early period after the founding of the People＇s Republic the Chinese leadership chose to follow the Soviet model in development strategy and adopt a foreign policy of ＂leaning to one side,＂ allying itself with the Soviet Union. After nearly three decades of upheavals and vicissitudes, the Chinese leadership fmally stepped on to the ＂socialist road with Chinese characteristics＂ and chose the ＂independent and non-aligned foreign policy of peace.＂ This marked a fundamental readjustment to China＇s national development strategy and foreign policy since the late 1950s the result of which was a ＂farewell to the Cold War.＂展开更多
文摘A new C-glycosylflavone, named panzhihuacycaside (1), was isolated from the leaves of Cycas panzhihuaensis L. Zhou et S. Y. Yang (Cycadaceae) along with 2,3-dihydrohinokiflavone (2), 5,5',7,7', 4',4''-hexahydroxy-(2',8')-biflavone (3), vanillic acid (4), P-sitosterol (5) and daucosterol (6). Their structures were elucidated by spectral and chemical evidence.
文摘The growing attention on urban tourism was very widespread. There are two angles to study urban tourism: supply-side and demand-side. And the supply-side of the tourism remains very important. The RBD (Recreation Business District) is a useful framework to understand the components of urban tourism and how they fit together. The paper begins with a review on the RBD and the spatial structure of tourism in urban areas and then attempts to develop a more general understanding of the spatial structure evolution of RBDs in a tourist-historic city-Suzhou. The spatial structures and functions of the RBDs in Suzhou are examined, based on field observations, interviews with city officials and industry leaders, and a review of available documents. The urban tourism of Suzhou has developed in a range of contexts, that various types of RBDs have emerged as a result of different urban development strategies. The spatial structure has evolved from the past "Single-cored Structure" to "Double-cored Structure" at present, and then to "Chain Structure" in the future. The spatial form and evolution of RBD in Suzhou are closely relative with its urban spatial expansion. Urban area dispersal is the prerequisite of the emergence of the RBD. Planning and constructing the RBD becomes a new impetus to urban growth or renewal. Finally, a number of strategies for planning and developing the RBD in Suzhou are suggested. The different RBDs should adopt different strategies. Intensification can be the possible strategy for the RBDs in the ancient city. Accreting with the urban theme park or engrafting on the Jinji Lake is suggested respectively for the RBD in the Suzhou New District and the Suzhou Industrial Park.
基金supported by one of the projects of the National 14th Five-Year Plan:“Compilation of the Volume on History of Science and Technology of the New General History of China”(《(新编)中国通史》科学技术史卷)。
文摘The transmission of science and technology from the Soviet Union to People’s Republic of China in the mid-twentieth century is an important research area of contemporary history of science and technology.This paper takes the construction of the cyclotron in Lanzhou,China as the case to discuss the characteristics of technology transfer from the Soviet Union to China.The review of extensive archives reveals that the construction of cyclotron took place in the framework of China’s nuclear weapons development.Although the transmission of science and technology from the Soviet Union to China fit into the one-way transmission-reception model in general,both the Chinese demand and the Soviet response had key influences on the transmission.In the early cyclotron construction,the Chinese side relied on the Soviets,and the mode of the cooperation between Soviet and Chinese engineers can be described as one of expertstudent.In the early 1960 s,the relationship between China and the Soviet Union broke down.The Soviet engineers were required to withdraw with the technical data,which created conflicts in the roles played by the Soviet engineers,most of whom chose to set the sense of professional responsibility as their highest priority.After the departure of the Soviet experts,Chinese physicists played the leading role in the project,using scientific knowledge they had,relying on the technical materials left by Soviet experts,and cooperating fully with local engineers,thus completing the cyclotron.This case can provide us with valuable clues for the understanding of transnational history of science and technology.The seemingly one-way transmission-reception model is actually influenced by the needs of both sides.While the transnational flow of knowledge is inevitably affected by political factors from both sides,the process is far more complex than it appears.
文摘This paper is a report of a survey study of secondary school students' EFL learning motivation in North Jiangsu. Several motivational theories other than Gardner's traditional social-psychological approach have been exploited in the design of the questionnaire in the hope of better describing EFL learning motivation in a situation-specific context from different perspectives and checking the validity of various motivational theories in explaining EFL learning motivation in China.
文摘Seen from the perspective of the relationship between China and the Cold War, the process of normalization of Sino-Soviet relations was one by which China gradually shifted its foreign policy from a Cold War strategic framework to new diplomatic ideas shaped and developed by Chinese policy makers in the course of reform and opening up. In the early period after the founding of the People＇s Republic the Chinese leadership chose to follow the Soviet model in development strategy and adopt a foreign policy of ＂leaning to one side,＂ allying itself with the Soviet Union. After nearly three decades of upheavals and vicissitudes, the Chinese leadership fmally stepped on to the ＂socialist road with Chinese characteristics＂ and chose the ＂independent and non-aligned foreign policy of peace.＂ This marked a fundamental readjustment to China＇s national development strategy and foreign policy since the late 1950s the result of which was a ＂farewell to the Cold War.＂
