向量丛上的联络映射

论述了向量丛上联络的性质，得到流形Ｍ与欧氏空间局部等距的一个充要条件，并且证明了Ｍ作为切丛ＴＭ中的子流形时，Ｍ的法丛与ＴＭ是等距的。     

典则分析研究柴胡达原饮不同煎煮方式对化学成分溶出的影响

研究柴胡达原饮多种分煎、合煎方式对柚皮苷、橙皮苷、新橙皮苷、和厚朴酚、厚朴酚5种成分溶出的影响.将柴胡达原饮方中10味中药材,按照君臣佐使分为4组:A(黄芩、柴胡),B(枳壳、桔梗、厚朴、草果、青皮、槟榔),C(荷叶),D(炙甘草).按照排列组合排成15种组合方式.采用UFLC检测提取液中柚皮苷、橙皮苷、新橙皮苷、和厚朴酚、厚朴酚的含量.运用SAS 9.1对数据进行相关分析和综合评判.结果发现:5种成分均能达到基线分离,各成分均有较宽的线性范围和良好的线性关系;枳壳在合煎、分煎中受到的影响与青皮、厚朴是不同的;较佳组合为ACD+B,柚皮苷、橙皮苷、新橙皮苷、和厚朴酚、厚朴酚的含量分别为1.3130、0.6370、1.9420、0.8786、0.6110 mg/mL.ACD+B方式分煎,5种成分的溶出最大;相关分析能较好地揭示各组分的相互关系.     

单机E/T调度问题的动态规划新解法

本文利用最优调度的目标函数的性质，放弃了参数为整数的假定，改进了求解单机的Ｅ／Ｔ调度问题的动态规划算法，使其在时间复杂度和空间复杂度两方面都有提高     

酵母细胞膜透性变化对发酵油莎豆粕制乙醇的影响

研究发现,通过在发酵培养基中添加0.8mmol/L棕榈酸可将燃料乙醇产量提高12.7%.生长在培养基中分别添加棕榈酸、亚油酸和不添加任何脂肪酸的菌体经过18%(v/v)乙醇冲击7h,酵母存活率分别为39%、5%和0%.生长于不同脂肪酸条件下酵母的细胞膜富含各自所添加的脂肪酸.菌体生长曲线表明在稳定期,生长于添加棕榈酸条件下的菌体的细胞浓度最大.菌体膜透性由大到小排列顺序为:不添加脂肪酸、添加亚油酸、添加棕榈酸;这与菌体乙醇耐性由弱到强的顺序完全一致,这说明菌体乙醇耐性的提高与细胞膜透性维持较低水平存在密切联系.从乙醇生成动力学模型参数分析可知:随着菌体乙醇耐性的增强,细胞的生长速率和细胞浓度对产物生成速率的贡献也在逐渐加强,这说明在发酵培养基中添加棕榈酸对于缩短发酵周期是有可能的.     

Multi-Level Error Detection and Concealment Algorithm to Improve Speech Quality in GSM Full Rate Speech Codecs

Digital mobile telecommunication systems, such as the global system for mobile (GSM) system, want to further improve speech communication quality without changing the channel encoders and decoders. Speech quality is most affected by residual bit errors in received speech frames. Conventional methods use binary decision strategies for error detection and concealment in frames. This paper presents a multi-level error detection and concealment algorithm for GSM full rate speech codec systems. The algorithm use...     

N,N‘—二（4,4,6,6—四甲基—4—哌啶基）—1,6—己二胺的合成

初步探讨了以三丙酮氨与己二胺为原料合成Ｎ，Ｎ‘－二（２，２，６，６－四甲基－４－哌啶基）己二胺，并对不同的工艺路线和反应的影响因素如催化剂、温度等进行了研究，发现以Ｐｄ／Ｃ为催化剂的一步法有着明显的三丙酮氨开环副反应，给出复杂的反应混合物，而以骨架镍为催化剂的两步法可得到收率接近８０Ｒ 光稳定剂９４４中间体。     

Localization of Golgi-resident glycosyltransferases

For many glycosyltransferases, the information that instructs Golgi localization is located within a relatively short sequence of amino acids in the N-termini of these proteins comprising: the cytoplasmic tail, the transmembrane spanning region, and the stem region (CTS). Also, one enzyme may be more reliant on a particular region in the CTS for its localization than another. The predominance of these integral membrane proteins in the Golgi has seen these enzymes become central players in the development of membrane trafficking models of transport within this organelle. It is now understood that the means by which the characteristic distributions of glycosyltransferases arise within the subcompartments of the Golgi is inextricably linked to the mechanisms that cells employ to direct the flow of proteins and lipids within this organelle.     

基于VC6.0的SR830数据采集系统的设计与实现

基于VC6.0实现了对SR830锁相放大器串口数据的精确采集与监测.首先,分析了光电检测系统中常用的SR830锁相放大器的串口数据传输特点,并分析了VB等环境下使用通信控件开发采集软件的不足.其次,通过需求分析,从框架建立、图形显示、通信设计等方面,对系统结构进行了构建.最后,基于VC6.0和重叠I/O,实现了数据采集系统.结果显示,该系统实现了对SR830数据的实时精确采集、显示和事后保存、历史文件比较等功能,克服了之前软件易发生溢出错误的问题,满足了光电化学检测的需要.     

A Sensitivity-Based Heuristic Search for Constrained Optimization in Complex Systems

1.INTRODUCTIONThealgorithmforconstrainedoptimizationincomplexsystemscanbedividedintotwoclasses:exactandheuristicmethods.Theexactmethods,whicharepartlysummarizedbyTitanetal.[1],havecomputationalrequiremeatsthatgrowexponentiajlywiththesizeoftheproblem.AlthoughheuristicmethodshavemodestcomputationalrequirementsandareeasytoAnplemellt,theyaregenerallyforredundancyallocation[2-4].2.S~EMENTOFProBLEM2.1NotationN:nUmberofcomponents;M:numberofconstraints;Rs:systemreliability;Rj:thereliabili…