蒸汽发生器二次侧清洁度的视频检查

立式平管板Ｕ形管束的压水堆核电站蒸汽发生器安装至瞬变工况期间，管板上表面的铁基金属残余物的堆积和外来物的存在，以及商业运行后管板、传热管、管子支撑板等的低流速区域里沉积物的堆积要求进行蒸汽发生器的清洁度检查。介绍了蒸汽发生器二次侧清洁度的视频检查技术。该技术适用于蒸汽发生器安装至瞬变工况和投入商业运行后可能发生污染的各阶段的清洁度检查。     

辨识时变系统遗忘因子算法的收敛性分析

著名的递推遗忘因子算法（ＲＦＦＡ）可以用辨识时变系统参数，具有良好的跟踪性能，本文借助于随机过程理论分析了ＲＦＦＡ的收敛性和稳定性，给出了参数跟踪误差的上下界。     

复合果胶酶加工番石榴果汁的工艺优化

采用法国产的复合液态果胶酶加工番石榴果汁。研究结果表明,最佳工艺条件为:每千克番石榴果浆加入20mL浓度为0.01mL/mL的复合液态果胶酶、pH为3.5、45℃下恒温酶解5￣6h。使用不同的澄清剂对番石榴果汁进行澄清,结果表明,加浓度为0.5%的明胶溶液20mL/kg果汁中的效果最佳。番石榴果汁,保持了原有果实的营养成分和保健功能,有独特的风味。     

Microstructure and Mechanical Properties of Heat-treated GeSb_2Te_4 Thin Films

The effect of annealing on microstructure,adhesive and frictional properties of GeSb 2 Te 4 films were experimentally studied.The GeSb 2 Te 4 films were prepared by radio frequency(RF)magnetron sputtering,and annealed at 200℃and 340℃under vacuum circumstance,respectively.The adhesion and friction experiments were mainly conducted with a lateral force microscope(LFM)for the GeSb 2 Te 4 thin films before and after annealing.Their morphology and phase structure were analyzed by using atomic force microscopy(AFM)and X-ray Diffraction(XRD)techniques,and the nanoindention was employed to evaluate their hardness values.Moreover,an electric force microscope(EFM)was used to measure the surface potential. It is found that the deposited GeSb 2 Te 4 thin film undergoes an amorphous-to-fcc and fcc-to-hex structure transition;the adhesion has a weaker dependence on the surface roughness,but a certain correlation with the surface potential of GeSb 2 Te 4 thin films.And the friction behavior of GeSb 2 Te 4 thin films follows their adhesion behavior under a lower applied load.However,such a relation is replaced by the mechanical behavior when the load is relatively higher.Moreover,the GeSb 2 Te 4 thin film annealed at 340℃presents a lubricative property.     

室外LED显示及其在交通领域的应用

介绍了室外LED显示技术及其在道路交通信息显示领域中的应用,指出目前国内室外LED显示屏普遍存在的主要问题.结合应用于高速公路收费站的LED显示屏的设计,给出解决或者克服这些问题的方法.介绍了室外LED显示的现状,预测了其发展趋势.     

软式操纵系统中张力调节器的设计研究

软式操纵系统是通过钢索张力来传递操纵力的,钢索张力的变化直接影响飞机的操纵性能。张力调节器就是使钢索在各种状态下保持张力恒定的一种调节装置。对张力调节器的原理、结构形式进行了综合论述,并结合设计实例来说明钢索张力调节器的设计过程及设计中各参数的选取原则。     

基于Solidworks的零件建模的若干方法

介绍零件的Solidworks三维建模的几种方法。利用Solidworks的Toolbox插件构造常见的零件模型;利用Solidworks曲线插入功能构造草图,或利用二维图形设计软件进行草图绘制,然后输出到Solidworks中特征构造。     

基于MATLAB的远程电机调速系统设计

详细介绍了利用MATLAB语言实现串行通信的原理和步骤,并给出了在MATLAB环境下实现远程电机调速的具体应用,实验结果表明该方案具有简单、实用、实时性能好,控制精度高等特点.     

Nature and Growth of Interaction Layers Formed during the Reaction between Solid Ni and Liquid Al

The nature and growth of the interaction layers between solid Nb and liquid Al has been studied by carrying out the tests on Nb(s)-Al(l)and Nb(s)-Al(l)-Ni(s) reaction couples isothermally reacted between 700℃and 900℃for different time intervals.It has been found that the interaction layer between Nb and Al contains two parts:a thin continuous layer of NbAl3 adjacent to the Nb surface and a two-phase zone constituted of NbAl3 particles dispersed in an Al matrix.Although the nature and growth of interaction layers follows the sour-stage mechanism,a typical cruciform pattern does not occur in Nb(s)-Al(l) reaction couples.However,a cruciform pattern was observed in Nb(s)-Al(l)-Ni(s)reaction couples.The movement of NbAl3 particles is important to the production of cruciform pattern in the reaction couples.     

在探索中不断发展的松辽水文

松辽水利委员会成立25年来,水文局(信息中心)紧跟时代脉搏,勇于实践,不断探索,在出色完成不同时期所承担的生产、科研任务并取得丰硕成果的同时,充分发挥流域机构水文管理职能,积极做好流域水文管理工作,为松辽流域水文事业的发展做出了重要贡献.本文对水文局(信息中心)25年来走过的历程和取得的成就进行了回顾与总结.