Established in 1989 as a forum for its member countries or areas to discuss eco-nomic and related issues, Asia-Pacific Economic Cooperation (APEC) is nowbecoming an increasingly important regional organization. With a...Established in 1989 as a forum for its member countries or areas to discuss eco-nomic and related issues, Asia-Pacific Economic Cooperation (APEC) is nowbecoming an increasingly important regional organization. With a membership of18 countries and areas, it accounts for 34. 5％ of total world population, 50％ oftotal world GNP and 40％ of total world trade. What is more significant of APECis that East Asia is now the most dynamic region in global economic growth. Theyear 1994 witnessed an historic event of APEC. the announcement of the BogorDeclaration by the APEC leaders’ informal meeting in Bogor. The Bogor Declara-展开更多
In June 2008 the Olympic torch,representing sport- ing ethos of the world,will embark on its primary journey to Mt.Qomolangma.The world will once again focus on"the roof of the world"-Tibet. On July 13^(th),...In June 2008 the Olympic torch,representing sport- ing ethos of the world,will embark on its primary journey to Mt.Qomolangma.The world will once again focus on"the roof of the world"-Tibet. On July 13^(th),2001,the Beijing Organizing Committee for the 29^(th) Olympic Games made its final statement with the promise that"if Beijing was accepted as the host of the 2008 Olympiad,Beijing will organize the route of展开更多
Space Technology Development in China China began to develop space technology in the 1950s. After 40 years, China now has necessary facilities for the research, design, development, production and test of various sate...Space Technology Development in China China began to develop space technology in the 1950s. After 40 years, China now has necessary facilities for the research, design, development, production and test of various satellites and series launch vehicles, many experts with rich experience and superb technology, three satellite launch bases in Jiuquan, Taiyuan and Xichang, and Xi’an TT&C Station, which have the ability to launch lowearth-orbit,展开更多
Molecular biology covers a wide scope of problems related to molecular and cell biology including structural and functional genomics, transcriptomics, proteomics, bio- informatics, and biomedicines. Molecular biology ...Molecular biology covers a wide scope of problems related to molecular and cell biology including structural and functional genomics, transcriptomics, proteomics, bio- informatics, and biomedicines. Molecular biology is the study of molecular underpinnings of the processes of replication, transcription, translation, and cell function. The central dogma of molecular biology where genetic material is transcribed into RNA and then translated into proteins, despite being oversimplified, still provides a good starting point for understanding the field. The picture has been revised in light of emerging novel roles for RNA. Increasingly many other areas of biology focus on molecules, either directly or indirectly studying the interactions in their own right. The techniques and methods of molecular biology, such as molecular cloning, polymerase chain reaction, gel electrophoresis, macromolecule blotting and probing, microarray and so on, have been applied in biomedicine and herbal medicines.展开更多
<正>Horticultural Plant Journal(HPJ)is a bimonthly academic journal co-sponsored by Chinese Society for Horticultural Science(CSHS),Institute of Vegetables and Flowers(IVF),Chinese Academy of Agricultural Scienc...<正>Horticultural Plant Journal(HPJ)is a bimonthly academic journal co-sponsored by Chinese Society for Horticultural Science(CSHS),Institute of Vegetables and Flowers(IVF),Chinese Academy of Agricultural Science(CAAS)and China Agricultural Science and Technology Press.CN10-1305/S,ISSN 2095-9885,Online ISSN2468-0141.展开更多
The clutter direction-Doppler curves are not aligned on the near range bins for forward looking airborne radar. As a result, the performance of clutter suppression by Space-Time Adaptive Processing (STAP) degrades gre...The clutter direction-Doppler curves are not aligned on the near range bins for forward looking airborne radar. As a result, the performance of clutter suppression by Space-Time Adaptive Processing (STAP) degrades greatly because of the clutter range dependence. To deal with this problem, a new compensated method is proposed in this paper. The method rebuilds the clutter covariance matrix based on spatial high resolution Minimum Variance Distortionless Response (MVDR) spectrum, and then finds a matrix to transform the covariance matrix of short-range gate to the referred far-range gate. The method can compensate the clutter range dependence well. The simulation results show validity of the method.展开更多
A method of underwater simultaneous localization and mapping （SLAM） based on forward-looking sonar was proposed in this paper. Positions of objects were obtained by the forward-looking sonar, and an improved associa...A method of underwater simultaneous localization and mapping （SLAM） based on forward-looking sonar was proposed in this paper. Positions of objects were obtained by the forward-looking sonar, and an improved association method based on an ant colony algorithm was introduced to estimate the positions. In order to improve the precision of the positions, the extended Kalman filter （EKF） was adopted. The presented algorithm was tested in a tank, and the maximum estimation error of SLAM gained was 0.25 m. The tests verify that this method can maintain better association efficiency and reduce navigatioJ~ error.展开更多
Having devoted his life to building cultural,educational,and economic ties with China for over three decades,Tom Watkins shares his personal observations and perspectives on China’s latest development and its efforts...Having devoted his life to building cultural,educational,and economic ties with China for over three decades,Tom Watkins shares his personal observations and perspectives on China’s latest development and its efforts to build a community with shared future for all mankind.展开更多
Ⅰ. Review the past of 1994 international shiPPing market: 1994 saw world economy begin a new cycle of boom. The economy of the West was on the way to a complete recovery, and that of East Asia was keeping up its stea...Ⅰ. Review the past of 1994 international shiPPing market: 1994 saw world economy begin a new cycle of boom. The economy of the West was on the way to a complete recovery, and that of East Asia was keeping up its steady growth. ACCOFding to the estimation 0f International Monetary Fund, the 1994 growth rate of world economy was 3％ and that of world—trade volume was about 5％. Thanks to these factors, the international shipping market had also Undergone considerable changes. 1. In 1994,world dry—bulk shipping market first sagged and thenstiffened. Affected by the negative growth of展开更多
A review was conducted on the environmental evolvement and environmental archaeological research since the 1980s in the Yangtze Delta. Former environmental evolvement and environmental archaeological research results ...A review was conducted on the environmental evolvement and environmental archaeological research since the 1980s in the Yangtze Delta. Former environmental evolvement and environmental archaeological research results can be summed up into 4 aspects： 1） Formation and evolution of the Taihu Lake; 2） Transgression and sea-level changes in the Holocene epoch; 3） Reconstruction of the pre-historical environment; and 4） Impacts of environmental variations on the rise and fall of human civilization （formation of the cultural interruptions）. Based on this review, some limitations in the present research methods and possible outcomes are pointed out in this paper.展开更多
文摘Established in 1989 as a forum for its member countries or areas to discuss eco-nomic and related issues, Asia-Pacific Economic Cooperation (APEC) is nowbecoming an increasingly important regional organization. With a membership of18 countries and areas, it accounts for 34. 5％ of total world population, 50％ oftotal world GNP and 40％ of total world trade. What is more significant of APECis that East Asia is now the most dynamic region in global economic growth. Theyear 1994 witnessed an historic event of APEC. the announcement of the BogorDeclaration by the APEC leaders’ informal meeting in Bogor. The Bogor Declara-
文摘In June 2008 the Olympic torch,representing sport- ing ethos of the world,will embark on its primary journey to Mt.Qomolangma.The world will once again focus on"the roof of the world"-Tibet. On July 13^(th),2001,the Beijing Organizing Committee for the 29^(th) Olympic Games made its final statement with the promise that"if Beijing was accepted as the host of the 2008 Olympiad,Beijing will organize the route of
文摘Space Technology Development in China China began to develop space technology in the 1950s. After 40 years, China now has necessary facilities for the research, design, development, production and test of various satellites and series launch vehicles, many experts with rich experience and superb technology, three satellite launch bases in Jiuquan, Taiyuan and Xichang, and Xi’an TT&C Station, which have the ability to launch lowearth-orbit,
文摘Molecular biology covers a wide scope of problems related to molecular and cell biology including structural and functional genomics, transcriptomics, proteomics, bio- informatics, and biomedicines. Molecular biology is the study of molecular underpinnings of the processes of replication, transcription, translation, and cell function. The central dogma of molecular biology where genetic material is transcribed into RNA and then translated into proteins, despite being oversimplified, still provides a good starting point for understanding the field. The picture has been revised in light of emerging novel roles for RNA. Increasingly many other areas of biology focus on molecules, either directly or indirectly studying the interactions in their own right. The techniques and methods of molecular biology, such as molecular cloning, polymerase chain reaction, gel electrophoresis, macromolecule blotting and probing, microarray and so on, have been applied in biomedicine and herbal medicines.
文摘<正>Horticultural Plant Journal(HPJ)is a bimonthly academic journal co-sponsored by Chinese Society for Horticultural Science(CSHS),Institute of Vegetables and Flowers(IVF),Chinese Academy of Agricultural Science(CAAS)and China Agricultural Science and Technology Press.CN10-1305/S,ISSN 2095-9885,Online ISSN2468-0141.
基金Supported by Education Department of Hunan Province Project (09C201)Hunan Provincial Natural Science Foundation of China (10jj6091) Planned Science and Technology Project of Hunan Province (2010FJ6015)
文摘The clutter direction-Doppler curves are not aligned on the near range bins for forward looking airborne radar. As a result, the performance of clutter suppression by Space-Time Adaptive Processing (STAP) degrades greatly because of the clutter range dependence. To deal with this problem, a new compensated method is proposed in this paper. The method rebuilds the clutter covariance matrix based on spatial high resolution Minimum Variance Distortionless Response (MVDR) spectrum, and then finds a matrix to transform the covariance matrix of short-range gate to the referred far-range gate. The method can compensate the clutter range dependence well. The simulation results show validity of the method.
基金Supported by the National Natural Science Foundation of China(51009040)National Defence Key Laboratory of Autonomous Underwater Vehicle Technology(2008002)Scientific Service Special Funds of University in China(E091002)
文摘A method of underwater simultaneous localization and mapping （SLAM） based on forward-looking sonar was proposed in this paper. Positions of objects were obtained by the forward-looking sonar, and an improved association method based on an ant colony algorithm was introduced to estimate the positions. In order to improve the precision of the positions, the extended Kalman filter （EKF） was adopted. The presented algorithm was tested in a tank, and the maximum estimation error of SLAM gained was 0.25 m. The tests verify that this method can maintain better association efficiency and reduce navigatioJ~ error.
文摘Having devoted his life to building cultural,educational,and economic ties with China for over three decades,Tom Watkins shares his personal observations and perspectives on China’s latest development and its efforts to build a community with shared future for all mankind.
文摘Ⅰ. Review the past of 1994 international shiPPing market: 1994 saw world economy begin a new cycle of boom. The economy of the West was on the way to a complete recovery, and that of East Asia was keeping up its steady growth. ACCOFding to the estimation 0f International Monetary Fund, the 1994 growth rate of world economy was 3％ and that of world—trade volume was about 5％. Thanks to these factors, the international shipping market had also Undergone considerable changes. 1. In 1994,world dry—bulk shipping market first sagged and thenstiffened. Affected by the negative growth of
基金Supported by the National Natural Science Foundation of China（No.4040.1006）.
文摘A review was conducted on the environmental evolvement and environmental archaeological research since the 1980s in the Yangtze Delta. Former environmental evolvement and environmental archaeological research results can be summed up into 4 aspects： 1） Formation and evolution of the Taihu Lake; 2） Transgression and sea-level changes in the Holocene epoch; 3） Reconstruction of the pre-historical environment; and 4） Impacts of environmental variations on the rise and fall of human civilization （formation of the cultural interruptions）. Based on this review, some limitations in the present research methods and possible outcomes are pointed out in this paper.
