不可约g(A)模的某些性质

设g(A)是结合于n×n广义Cartan矩阵A的kac-Moody代数,为Cartan子代数,π={α_1,…,α_n},π~v={α_1~v,…,α_n~v}分别为根基和对偶根基。P_+表示支配整线性函数的集合。g(A)上不可约可积模L(Λ)的权系记为P(Λ)。本文首先证明了如果λ是P(Λ)中的一个支配权,那么P(λ)P(Λ)。进一步,如果A—λ也是支配的,那么就有mult_(λμ)≤mult_Λμ,_μ∈P(λ)。此外还证明了文献[1]中命题11.2(b)中的条件不仅是充分的也是必要的,并利用P(Λ)给出P(λ)的一个刻划。本文中所用的符号均与文献[1]中的相同。     

A Review on Basic Research of Desertification Combating in China

China is one of the countries seriously affected by desertification in the world. Nowadays, China has desertification-affected land area of about 2.67 million square kilometers, accounting for 27.9 percent of the entire territory in China, at an average rate of about 10400 square kilometers annually during the period of 1994 to 1999. At the same time, the area of desertification caused by wind erosion is expanding at an average rate of 3436 square kilometers per year. China' s gov-     

Panel Meeting for A3 Foresight Program 2008 held in Hangzhou

Jointly organized by the Bureau of International Cooperation,Department of Engineering & Material Sciences and Department of Mathematical & Physical Sciences of NSFC,the panel evaluation meeting for A3 Foresight Program for the year 2008 was held in Hangzhou from May 28 to 30,2008.     

A Brief Introduction to a Major Project—The Physical-Chemical Processes in the Lower Atmosphere and Their Interaction with the Ecological System over the Yangtze Delta

With rapid industrialization and agricultural modernization in the past two decades, the Yangtze Delta Region in China has been one of the regions in the world most influenced by human activity. How has the economic development impacted on ecosystem, environment, agriculture and regional climate in this region? What are the mechanisms of the interactive processes and feedbacks? What will be the future changes under different development scenarios? These are questions of critical importance to sustain the rate of social and economic development. A Major Project, The Physical-Chemical Processes in the Lower Atmosphere and Their Interaction with the Ecological System over Yangtze Delta, as one of the Ninth Five-Year Major Programs (1996—2000) funded by the National Natural Science Foundation of China, NSFC, just focused on those questions. Under the leadership of Prof. Zhou Xiuji, academician of the Chinese Academy of Sciences this project has made significant achievements and great progress in answering the above questions.     

CBCSG10:A phase Ⅲ trail adjuvant capecitabine with standard chemotherapy for triple negative breast cancer

正With the support from the National Natural Science Foundation of China,the research team led by Prof.Shao ZhiMin(邵志敏)at the Department of Breast Surgery,Fudan University,Shanghai Cancer Center and the Department of Oncology,Shanghai Medical College,Fudan University,recently reported that adjuvant capecitabine with docetaxel and cyclophosphamide plus epirubicin significantly improved DFS in     

A New Discovery in Science: Far-Reaching Effects of the Hawaiian Islands on the Pacific Ocean-Atmosphere

Dr. Shangping Xie (EPRC, Hawaii University, USA), Dr. W. Timothy Liu (J.P.L. California Institute of Technology, USA), Professor Qinyu Liu (Ocean U-niversity of Qingdao, China) and Masami Nonaka (IPRC, Hawaii University, USA) discovered a phe-     

A highly specific ratiometric two-photon fluorescent probe to detect dipeptidyl peptidase Ⅳ in plasma and living systems

正Subject Code:H30With the support by the National Natural Science Foundation of China and National Basic Research Program of China,the group led by Prof.Ge Guangbo(葛广波)and Prof.Yang Ling(杨凌)from the Laboratory of Pharmaceutical Resource Discovery,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,reported a highly specific ratiometric two-photon fluorescent probe to detect dipeptidyl     

New light shed on global epidemiology of avian influenza A H5N1 virus infection in humans,1997—2015

<正>With the support by the National Natural Science Foundation of China,the research team led by Prof.Yu Hongjie(余宏杰)at the School of Public Health,Fudan University,Key Laboratory of Public Health Safety,Ministry of Education,and the Key Laboratory of Surveillance and Early Warning on Infectious Disease,Chinese Center for Disease Control and Prevention,has published the paper entitled"Global epi-     

Journal overview： Journal of Mathematical Research with Applications （JMRA）, formerly Journal of Mathematical Research and Exposition （JMRE） created in 1981, is a home for 更多还原泰坦尼克号沉没与月球有关？

最近有关月球的新发现还真不少,其中最令人感兴趣是月球与泰坦尼克号沉没之间的联系。2D12年4月14日是泰坦尼克号游轮沉没100周年纪念日。2012年4月号的美国《天空与望远镜》杂志刊文说,美国“法医天文学家”、得州大学的唐纳·奥尔森提出一种新奇而又惊人的假想——月球可能在泰坦尼克号沉没大洋底、1500人殒命的惨剧中起了推手作用。