Temperature variations on the Tibetan Plateau over the last two millennia

The paleoclimate data recovered from ice cores,tree rings and lake sediments indicate regional features of cfimatic change on the Tibeta n Plateau (TP) during the last 2000 years. The composite temperature reconstructions in-dicate that several main climatic episodes, such as the “LittleIce Age“ between 1400 and 1900, the “Medieval Warm Pe-riod“ in 1150-1400, a less warm period in 800-1100, and an earlier cold period between the 3rd and 5th centuries,occurred in the TP. In addition, temperature varied from region to region. The period from AD 800 to 1100, which waswarm in northeastern TP, was contemporaneous with cool-ing in the western and southern TP. The southern TP ex-perienced warming between 1150 and 1400. For western TP,the δ^18O records of the Guliya ice core indicate that the pe-Hod 1250-1500 witnessed a clear warming. Large-scaletrends in the temperature history from northeastern TP aremore similar to those in eastern China than are the trendsfrom the Guliya ice cap far to the west and southern TP. The most prominent similarities between the temperature varia-tions of the TP and eastern China are such cold phases as 1100-1150, 1500-1550, 1650-1700 and 1800-1850, andthe latter three cold events match with three widespreadg lacial advances which occurred on the TP during the Little Ice A2e.     

Time-division phase modulated single-photon interference in a Sagnac interferometer

We introduce a stable, long-distance singlephoton Sagnac interferometer, which has a balanced configuration to efficiently compensate phase drift caused by change of the fiber-optic path. By using time-division phase modulation, single-photon interference was realized at 1550nm in a 5-km-long as well as 27-km-long Sagnac fiber loops,with a fringe visibility higher than 90% and long-term stability. The stable performance of the single-photon interference indicated that the time-division phase-modulated Sagnac interferometer might readily lead to practical applications in single-photon routing and quantum cryptography.     

电脑横机花型准备系统中混沌、分形图纹的生成

讨论了电脑横机花型准备系统中混沌、分形图纹的四种生成方法,给出了图纹编织花板的存储形式.花型准备系统中混沌、分形图纹的引入,大大提高了花型设计的快速性和花色品种的多样性.     

叠合梁框架柱与整浇框架柱的对比分析

根据两榀叠合梁框架、一榀整浇框架的实测资料，采用对比分析的方法，对叠合梁框架柱和整浇框架柱的受力性能及变形特征进行对比分析。结果表明，叠合梁框架柱的截面应变符合磁截面假定，柱的承载力并不因梁的叠合施工工艺和二阶段受力而降低；柱端钢筋和混凝土的应变在弹性阶段均滞后于整浇框架，底层柱的反弯点低于整浇框架柱。     

隧道火灾探测与报警系统的研究

介绍并对比了几种火灾探测传感器，分析了隧道火灾的成因及其特点、给出了熔缆的应用数学模型。论述了熔缆及其特性，具体研究了以熔缆为传感器的火灾探测报警系统，介绍了其硬件及软件的结构。关键词：     

4－（喹啉－8＇－甲基）－1，4，7，10－四氮杂环十三烷－11，13－二酮的合成及其与Cu（Ⅱ）－bipy形成三元配合物的稳定性研究

本文合成了４－（喹啉８＇－甲基）－１，４，７，１０－四氮杂环十三烷－１１，１３－二酮．测定了该配体和４－（吡啶－２＇－甲基）－１，４，７，１０－四氮杂环十三烷－１１，１３－二酮配体的质子化常数及它们与ＣＵ（Ⅱ）形成的二元配合物，与Ｃｕ（Ⅱ）－ｂｉｐｙ形成的三元配合物的稳定常数．还合成了４－（喹啉－８＇－甲基）－１，４，８，１１－四氮杂环十四烷－１２，１＇４－Ｍ酮配体，测定了该配体的质子化常数及其与Ｃｕ（Ⅱ）形成的二元配合物的稳定常数．讨论并比较了这类带有功能性侧基的二氧四胺大环新型配体在水溶液中与Ｃｕ（Ⅱ）的配位能力、配位方式和相应配合物的空间构型．     

蔗渣膳食纤维挤压改性的研究（Ⅰ）———挤压蒸煮对蔗渣膳食纤维组成与含量的影响

选用两种平均粒度为５００μｍ和８０μｍ的蔗渣膳食纤维，在法国ＣｌｅｘｔｒａｌＢＣ４５型双螺杆挤压机上研究挤压蒸煮处理对蔗渣纤维组成与含量的影响。结果表明，经挤压蒸煮后，蔗渣纤维的水溶性提高２２％１２４％，可溶性纤维含量增加ｗ＝２．７％９．５％，但对总膳食纤维含量的影响很小。     

自然指数函数展开式的多重分割法（六）：应用部分

以自然对数函数展开式的另一多重分割法作为抽象三角函数的应用．     

n 维单形的两个几何不等式

利用优超理论将平面上关于三角形的彼得洛维奇不等式和达林——莫泽不等式推广到ｎ维欧氏空间中的ｎ维单形上，得到（１）１Ｎ≤∑Ｎｉ＝１ａ２ｉ（∑Ｎｉ＝１ａｉ）２≤１ｎ（２）Ｍ≤∑Ｎｉ＝１ａｉ２－ｄ∏Ｎｉ＝１ａｉＳ≤ｎＳ２式中ａｉ（ｉ＝１，２，…，Ｎ；Ｎ＝ｎ（ｎ＋１）２）为ｎ维单形∑Ａ的棱长，ｄ为任一非负实数，Ｓ＝１ｎ∑Ｎｉ＝１ａｉ，Ｍ＝ｎ２ＮＳ２－ｄＳ（ｎＳＮ）Ｎ。