铝电解中铝液的凸起与循环

本文从理论上阐明了铝电解中铝液的运动规律及原因。研究表明,对双端供电的铝电解槽来说,电解槽的铝液中存在着两种力场:一个是F_(xy)类似向心力场;另一个是F_x平行力场。前者使槽中铝液凸起;后者使槽中铝液循环。在电解槽铝液中有这些运动现象存在,会大幅度降低电流效率与电能效率。为解决这些问题,提出了若干可行的措施。     

Method of Stabilizing the Surface Energy of Fabrics Coated with Silicone

Silicone coatings have been used in this study. The method adopted was the liquid drop analysis on the coated fabrics. The contact angle between a liquid drop and the fabric surface was measured with two liquids continuously and recorded by a computer. The surface energy was calculated by means of Owens method. Kinetic measurement was adopted. The contact angle of liquids on the fabric coated silicone decreased with time was found. A compound solution DX has been found, so that the contact angle of the liquids on the fabric washed with DX becomes constant, and the surface energy of the fabric can be reduced to below 15 mJ/m2.     

摆动从动件异向凸轮曲率半径与基本参数的关系

研究了摆动从动件异向凸轮在基圆尺寸不变的条件下,改变凸轮基本参数中心距(或者摆杆初始角),对凸轮轮廓凹弧最小曲率半径值的影响及其变化规律。     

桔梗中克百威提取条件优化

研究超声波提取法提取桔梗中残留的克百威农药,探讨了提取时间、提取温度和所加溶剂量对克百威提取率的影响,并通过正交设计对桔梗中药的克百威提取条件进行优化.结果表明提取温度、提取时间和溶剂量对克百威的提取均有显著影响.通过方差分析,确定其影响因素的大小顺序是提取温度提取时间溶剂量.最优提取条件为温度40℃、丙酮溶剂量30 m L、提取时间30 min.     

基于DS理论的网络时钟同步算法

目前的NTP(Network Time Protocol)时钟同步算法已不能满足许多新兴网络对时钟同步精度的要求.为此,提出一种基于DS(Dempster/Shafer)理论的NTP时钟同步改进算法.在分析目前NTP时钟同步算法不足的基础上,将DS理论引进到传统的NTP时钟同步中,建立一种改进的NTP时钟同步算法并进行...     

陀螺稳定平台控制算法比较研究

针对一款实验教学陀螺稳定平台,文章分别采用常规PID控制算法,变参数PID控制算法和变参数自调节模糊PID控制算法对速率环进行控制。仿真结果表明,系统采用变参数自调节模糊PID控制算法响应速度快,超调量小,抗干扰能力强,较常规PID和变参数PID控制算法具有更好的动、静态性能。     

南诏大理国史料人名和地名索引编制刍议

阐述了南诏大理国史料索引编制的必要性,介绍了南诏大理国史料的构成及南诏大理国史料人名、地名索引的编制方法。     

THE TRANSFER OF ALKALINE EARTH-METAL ION AT W／NB INTERFACE FACILITATED BY JOSAMYCIN

This paper describes the investigation of the transfer behaviour of the alkaline earth-metal cations across the water/nitrobenzene interface facilitated by josamycin in the nitrobenzene phase using semi-differential cyclic voltammetry. The peak height is directly proportional to the concentration of josamycin (nb) and to the potential scan rate. The complexes formed from alkaline earth-metal ions and josamycin at the w/nb interface are ML_2~(2+) ion.     

再论“公平”与“效率”何者为先

在我国经济快速增长的同时，收入分配的不公平现象越来越严重，这和长期以来分配领域始终坚持“效率优先，兼顾公平”的原则是分不开的。要降低这一政策口号的负面影响，就必须进行政策理念创新，不能只要效率而抛弃公平，而是要使公平与效率在多维度空间的交互作用中达到统一。     

脑肿瘤细胞的分子标记

在过去的20年，科研工作者已经在分子肿瘤领域取得了划时代的重大发现，这很大程度上归功于免疫组织化学方法的应用。这一方法在脑肿瘤研究中也已经从试验阶段走向了成熟。