洗衣机旋转系统驱动特性的研究

对电动洗衣机负载的稳态转矩转速特性进行实验研究,理论分析了洗衣机旋转系统的动力学特性,因此提出了对变频洗衣机的控制方式和电动机设计的有关考虑,并进行了实验。     

220 kV春平甲线电力电缆外护套绝缘缺陷分析

介绍了长春地区220 kV春平甲线电力电缆基本概况及其外护套绝缘缺陷,对电缆运行情况做了词研与分析,通过实测春平甲线电缆测试数据,提出电缆运行负荷不超过额定负荷60％,提高电缆运行环境等解决方案,以保证电缆线路安全运行。     

逐点插入法在三维地质可视化系统中的应用研究

逐点插入算法是一种依次插入数据点来解决曲面三角网格化的方法.此种方法可以实现平面域上离散数据点的De-launay三角网格化。本文深入研究了此种算法,并将此算法运用到三维地质模型可视化软件系统的设计中,取得很好的效果。     

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.     

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．