靛红褪色分光光度法测定溴酸根离子研究

在盐酸介质中,依据溴酸根离子氧化靛红褪色的原理提出了测定溴酸根离子的新方法,研究了测定的最佳条件。最大吸收波长λmax为610 nm,溴酸根离子在3-40μg／10 mL范围内符合比尔定律,测定的线性回归方程为A610=0．208 0ρ+0．081 6,相关系数为0．993 7,表观摩尔吸光系数为3．7×104。该法用于化学试剂中的微量溴酸根测定,结果满意。     

无取向硅钢热轧板形控制与轧制特性的关系

无取向硅钢板形质量要求日趋严苛。热轧是控制无取向硅钢成品横截面厚差偏大、尤其是边部减薄显著的关键工序。通过测试并分析无取向硅钢板形控制与专有轧制特性的关系,提出可通过采用合理的ASR非对称自补偿工作辊和常规工作辊的辊形配置及相应的窜辊策略可有效控制带钢边部减薄和凸度,使板形质量达到用户要求。     

基于交互式电信自助服务平台的设计和实现

随着电信业务量的扩大和自助服务领域的不断成熟，电信业务已经开始借助自助服务系统来实现。但是现有的自助服务系统无法满足电信综合业务的办理，基于交互式的电信自助服务平台通过在现有的自助服务平台中增加网络视频会议的功能能够实现现有的电信综合业务，它由自助服务终端、客户服务系统、呼叫中心和终端管理系统组成。     

Using group communication to monitor web-based group learning

Abstract  In a web group-learning environment, students must communicate with other group members on the Internet to accomplish group projects and share knowledge. Communication is likely to affect performance and so analysing the relationship between communicative relationships and group performance may help teachers to monitor groups effectively. Certain tasks are necessary to perform such an analysis — recording group communication, extracting communication relationships and determining the relationship between group communication and group performance. This study developed a method for determining relationships and rules for predicting performance to enable teachers to take act appropriately according to the predicted performance of the group. Four group performance indicators are considered — average grades within a group, project grade, frequency of resource-sharing and drop-out rate. Experimental results are presented, concerning the application of the methodology to a web class of 706 students, divided into 70 groups. The experimental results show that group communication patterns significantly affect group performance.     

Design and Implementation of Fuzzy Sliding-Mode Controller for a Wedge Balancing System

In this paper, we address the design and implementation of fuzzy sliding-mode controller for balancing a wedge system. At first, we examine the mathematical model of the wedge balancing system. The dynamic system is complex and ill defined; hence we propose the fuzzy sliding-mode control (FSMC) method to achieve the control objective. The proposed control method enhances the ability of fuzzy logic control so that the minimal number of fuzzy inference rules is systematically obtained even the plant parameters are unknown. Both computer simulations and real-time experiments are exploited to demonstrate the validity and feasibility of the developed control scheme.     

应用神经网络隐式视觉模型进行立体视觉的三维重建

针对传统的基于精确数学模型的立体视觉方法过程繁琐的不足，提出一种应用BP神经网络隐式视觉模型进行三维重建的算法。该算法将多个标定平面放置在有效视场内，用神经网络模拟立体视觉由两个二维图像重建三维几何的过程，经过网络训练建模后，无须摄像机标定即可进行三维重建。仿真实验结果证明，该算法比较简单，且能保持较高的精度。     

电力负荷预测方法在地区供电部门的应用

负荷预测是电力系统规划的基础，其准确度直接影响到电网建设。介绍电力系统负荷预测中常用的几种简单预测方法，用各方法对常德地区的负荷进行了预测，并分析了供电部门对负荷预测的基本要求。     

新SAR模拟测试信号产生方法

文中在分析SAR回波信号模型的基础上，提出一种结合地图分层原理与模板运算提供测试信号的快速仿真方法。     

消雷器与黄岛油库雷击火灾事故

黄岛油库５号非金属半地式油罐，１９８９年８月１２日上和进９时５５分爆炸起火，损失惨重。经调查，起火原因纯属非金属油罐的固有缺陷，如油面暴露面积大，油气易泄漏钢筋混凝土罐体对雷电效应屏蔽能力差，存在多处引发雷电火花隐患等。     

电化学调控法抑硫浮选的研究

进行了电化学法抑硫浮选的研究，探索了化学试剂法和外控电位法对细粒煤浮选脱硫的影响，通过试验证实，在低的矿浆电位下，黄铁矿能被有效抑制，提高了脱硫效率，它是一种经济有效、简单而无污染的抑制黄铁矿的新方法．