证券广播、信息处理系统的设计与实现

本文提出一种证券广播、信息处理系统，能实时的完成电脑证券系统的所有功能又无需上网。使用不同的接口．可应用于电脑系统和电视系统。本文主要从两个方面论述了该系统的原理，以W77E58为主芯片的证券信息广播服务器系统和以DALLS80C320为主要芯片的证券信息处理（接收、分析、交易）系统，并在此基础上，详细介绍了实现证券信息广播和接收、分析、交易的方法和原理。     

Modelling the activity of I in the primary coolant of a CANDU reactor

A mathematical treatment has been developed to describe the activity levels of ¹²⁹I as a function of time in the primary heat transport system during constant power operation and for a reactor shutdown situation. The model accounts for a release of fission-product iodine from defective fuel rods and tramp uranium contamination on in-core surfaces. The physical transport constants of the model are derived from a coolant activity analysis of the short-lived radioiodine species. An estimate of 3×10⁻⁹ has been determined for the coolant activity ratio of ¹²⁹I/¹³¹I in a CANDU Nuclear Generating Station (NGS), which is in reasonable agreement with that observed in the primary coolant and for plant test resin columns from pressurized and boiling water reactor plants. The model has been further applied to a CANDU NGS, by fitting it to the observed short-lived iodine and long-lived cesium data, to yield a coolant activity ratio of ∼2×10⁻⁸ for ¹²⁹I/¹³⁷Cs. This ratio can be used to estimate the levels of ¹²⁹I in reactor waste based on a measurement of the activity of ¹³⁷Cs.     

UO2 dissolution in Boom Clay conditions

The solubility of uranium dioxide (UO₂) was measured in real and synthetic Boom Clay waters with varying concentrations of humic acids and carbonate under reducing conditions at 20 °C. Uranium concentrations in function of time suggest the reduction of U(VI) to U(IV) by the humic acids which is occurring faster in real clay water than in synthetic clay waters. Humic acids induce also a competition to complex U(VI) in carbonate-containing solution, but they are not able to control the uranium concentration at high bicarbonate concentration (0.02 mol dm⁻³). Nevertheless they may play a role at low carbonate concentration. In our experimental conditions, the geochemical calculations indicate that two uranium secondary phases (U₄O₉ and UO_2(c)) are susceptible to control the uranium concentration in solution. These calculations are in good agreement with results of the X-ray photoelectron spectroscopy. At the end of tests, uranium concentrations reach steady-state values between 3 × 10⁻⁸ and 5 × 10⁻⁸ mol dm⁻³ in the bicarbonate-rich solutions. Although these concentrations are considered as conservative, they are 10-100 times higher than in natural Boom Clay. The consequence is that spent fuel could slowly dissolve in the interstitial clay water undersaturated with respect to UO₂/UO_2+x of the fuel.     

数字图书馆中基于Java的用户界面组件库研究与开发

It is one of the most important task in digital library to develop a universal and customized user interface for search and retrieval in heterogeneous,distributed environment.In this paper,we briefly introduce working principles and workflow of SiteSearch system developed by OCLC.Based on analyzing the functions of this system,we study and design composing elements and implementation mechanism of the customized interface.By analyzing and illustrating the examples,we develop Java based component library for dynamically generating the customized interface in Chinese information platform of SiteSearch system.Finally,we make some remarks on the difference of develop-ment of this system with other similar systems.     

W火焰炉炉膛磷酸盐耐火材料的施工工艺

针对山西省阳城电厂“W”火焰炉炉膛耐火材料的施工工艺和烘炉措施，从材料管理、施工浇注和养护烘炉进行了介绍，并在工程实践中改进优化了供货商的施工组织方案，以合理的工艺技术和烘炉措施，取得了良好的质量效果，缩短了工程建设工期。     

基于GPRS的电能远程抄表系统的设计与实现

通过中国移动通信有限公司的通用无线分组业务(general packet rad io service,GPRS)网络,可实现电力系统的远程数据采集和传输。介绍了基于GPRS技术的电能远程抄表系统的结构和工作原理,提出了一种基于Sony Ericsson Mob ile Commun ications公司GR47模块和W inbond公司W 77E58微控制器的电能远程抄表系统,从系统的硬件结构、软件设计和后台的接收程序设计等方面分析了该系统的实现方案。     

钨冶炼离子交换工艺中钨锡分离研究现状

20世纪70年代以来,由于离子交换技术的应用,我国在钨冶炼方面取得了显著的进步,产品质量名列前茅.结合国外钨冶炼工艺中除锡研究的发展情况,对我国除锡技术的发展现状进行了分析,并提出了除锡技术今后的发展方向.     

3Cr2W8V钢热挤压模的制造工艺研究

为提高3Cr2W8V钢热挤压模的使用寿命，从模坯锻造、热处理、机加工和电加工等方面，提出了工艺措施，生产实践证明是有效的。     

基于Lonworks的仿人智能PID控制器的设计

文中结合Lonworks现场总线和单片机各自的技术优势，详细地论述了利用仿人智能PID控制算法设计一块具有强大通信功能的智能仪表的方案。该方案既克服了传统PID控制存在的缺陷，又将测控技术和网络技术的特点巧妙地结合起来，有效地解决了工业用仪表信息共享的“孤岛”问题，同时也为进一步实现工业远程实时控制提供了极大的便利。文中详细地阐述了仪表的硬件电路设计、仿人智能PID控制的算法实现、软件程序流程图以及部分源代码，这些在实际应用中均具有较高的实用价值和较为广泛的应用前景。     

S355J2W+N钢焊接接头显微组织与力学性能

使用国产焊丝H08MnSiCuCrNiⅡ,利用焊接机器人对S355J2W+N钢用MAG焊的焊接方法进行了焊接,通过拉伸、硬度和金相检验试验方法对焊接接头显微组织和力学性能进行了分析研究。结果表明:焊接接头具有较好的力学强度,最大硬度值215.2HV出现在焊接热影响区。焊缝组织主要为先共析铁素体、板条铁素体及少量珠光体和粒状贝氏体,过热区主要为块状先共析铁素体、珠光体、粒状贝氏体,细晶区主要是细小的铁素体和珠光体。