SPECIAL TOPICS:Bio-spectroscopic sensing

Sensing of changes in the spectroscopic properties of organic fluorochromes or nanoparticles (NPs) on their interaction with analytes (targets) can be used for analyte detection. This technique has been extensively investigated and is used widely in the analysis of     

SPECIAL TOPICS:Recent advance in detonation theory

A detonation wave is a chemical reaction wave propagating at the velocity of a shock wave along the explosive charge. There is great de-mand for a detonation model that can accurately simulate the detonation process, which would provide a theoretical basis for highly effi-cient military destruction, the initiation of an atomic bomb, and calculations relating to the supernova SN Ia explosion. Detonation is com-     

SPECIAL TOPICS:Proteomic analysis of immunocamouflaged surfaces

The transfusion of red blood cells (RBC) is a critical component in the treatment of a number of acute and chronic medical problems. Indeed, approximately 75 million units of whole blood     

SPECIAL TOPICS:Chaotic laser brings out higher precision OTDR

Professor Wang YunCai and his student Wang AnBang reported a new concept of optical time domain reflectometry (OTDR) based on a chaotic light correlation method.This will be useful for precise fault location in fiber links with high-density events.Their work is reported in Issue 53 (February, 2010) of SCIENCE CHINA Information Sciences.     

SPECIAL TOPICS:Effervescent atomization spray:Understanding the modeling process

Understanding the atomization spray process is not only of academic interest but also is important to various industry applications. Signifi-cant experimental investigations concerning spray behavior have been conducted in the past. Fundamental understanding of the spray pro-cess is, however, still lacking and lags behind applications due to the high complexity of its stochastic behavior. Prof. LIN Jianzhong and     

SPECIAL TOPICS:The influence of estrogen on female mood changes

Women’s emotional responses can vary significantly premenstrually. They may become depressed or grumpy during menstruation or the premenstrual phase, known as premenstrual syndrome (PMS). Roughly 75% of reproductive-age women report premenstrual mood swings or physical     

SPECIAL TOPICS:DMP brings about new design space for virtualization technology

Professors Wang and Luo and their group in the Department of Computer Science and Technology,Peking University (PKU),have re cently introduced a new memory virtualization technique called Dynamic Memory Paravirtualization (DMP).     

SPECIAL TOPICS:Mn-doped ZnS is unsuitable to act as a dilute magnetic semiconductor

Dilute magnetic semiconductors (DMS) have recently been a major focus of magnetic semiconductor research. A laboratory from the University of Science and Technology of China explored the feasibility of doping manganese (Mn) into zinc sulfide (ZnS) to obtain magnetic semiconductors.     

SPECIAL TOPICS: An important aspect of structural design of super-tall buildings and structures: Across-wind loads and effects

Across-wind loads and effects have become increasingly important factors in the structural design of super-tall buildings and structures with increasing height. Although researchers have investigated the problem for over 30 years, the research achievements of across-wind     

SPECIAL TOPICS:Discovery of primary exhalative hydrothermal dolostone in the Santanghu area,Xinjiang,NW China

The origin of dolomite has been hotly debated. There is still a lack of petrological evidence and theoretical support for the formation of primary dolomite in geological history because dolomite cannot be synthesized under normal laboratory conditions. Wright experimented     

SPECIAL TOPICS:An efficient method for solving sound propagation in range-dependent ocean waveguides was found by researchers from Chinese Academy of Sciences

The coupled normal mode method is a powerful approach for solving range-dependent propagation problems in underwater acoustics. An important area of study is to improve stability and efficiency so     

SPECIAL TOPICS: Extended Coulomb failure criteria for the Zipingpu reservoir and Longmenshan slip investigated by researchers at the Chinese Academy of Sciences

Describing the correlation of a reservoir and earthquake slip remains a great challenge. Professor SHI Yaolin and his group at the Key Laboratory of Computational Geodynamics of the Chinese Academy of Sciences and the College of Science of the Graduate University of the Chinese Academy of Sciences are attempting to solve this problem. On the basis of the laboratory’s parallel central processing unit (CPU)     

数学美三题

数学不仅反映真，而且存在美，本文结合一些具体实例简明阐明了数学美的三个层次－体系美、方法美、创造美，以及三者之间有机的辩证统一的关系。     

步履从容:美丽女人始于足下

三月的小雨,温润清新,幸福的女人,健康靓丽。幸福女人的辞典中,离不开这样的关键词:青春、优雅、自信、健美!幸福女人的辞典中,不能缺乏这样的认知:衣食住行,皆有学问,事事洞明,智慧成就健康与美丽。     

北京地区自然和人文旅游热点问题研究进展

综合近年来国内外有关北京地区自然和人文旅游的相关文献,对北京地区旅游的基本现状、存在的问题、旅 游研究的热点问题和发展趋势进行了总结,同时讨论了旅游和地区城市化的相互关系,最后对可持续旅游研究及其展望 等方面的研究进行了分析,以期为北京旅游研究的未来发展和政府制定政策提供可靠的参考．结果表明北京地区自然及 人文旅游市场存在不少问题,各级政府在大力发展旅游业的同时,应使城市化和旅游业协调发展,注 重 生 态 稳 定 和 低 碳 环保,走可持续发展道路．在未来北京地区旅游的研究当中以下方面应加以关注:１）科学地定量评价自然和人文旅游资 源的价值;２）促进城市化与旅游之间可持续发展的途径和方法;３）可持续性旅游尤其是低碳旅游的理论和方法研究．      

主编的话

2009年受学会委托,由我担任<中国科技史杂志>的主编.在与三位副主编、编辑部及编委会一起工作的这段时间中,亲身感受了他们尽职尽责、竭力办好刊物的工作热情与无私奉献精神,从而使得各个环节的工作得以顺利有序的进行.     

主编的话

本刊第31卷,即2010年的编辑出版工作已顺利完成.这与两个主办单位(中国科学技术史学会、中国科学院自然科学史研究所)领导的支持,以及各位编委鼎力襄助、广大同道惠赐佳作,皆有密切关系.在此,我谨代表本刊编辑部向长期以来始终关心、爱护与支持本刊工作的同道及各界朋友致以最真诚的感谢;特别是要向一年来认真负责为本刊审校英文摘要的编委、李约瑟研究所的莫菲特先生道一声辛苦!同时,我还要感谢编辑部在繁忙的工作中,更新了自然科学史研究所网站下的本刊网页,增加了2000-2010年的中、英文     

离散群几何学的某些问题

本综述介绍了离散群几何学的一般理论及若干新进展,其中包括我系研究生新近得到的一些有趣结果。文中列举了一些尚未解决的问题并提供了部分参考文献。     

一类特殊的奇异级数

讨论了华林问题中一类特殊的奇异级数，在分析的范围内用代数数论的方法对它的下界作出一个估计，从而改进了Vaughan的结果。