导电涂料的研制

为了获得性能优良的导电涂料 ,采用对比试验和正交试验的方法对导电涂料进行了研究 ,分别对导电涂料的电阻、硬度、耐冲击强度、柔韧性等性能进行了测试 ,经过试验 ,确定了无机导电涂料的最佳配方为 :石墨 10 0g ,铅酸钡 10g ,三氧化二锑 5g ,二氧化钛 35g ,碳化硅 10g ,硅酸盐溶胶 170g。以此配方研制出了一种成本较低、生产工艺简单、具有良好的导电、导热性能的无机导电涂料。     

一维炉系统的测试实验

一维炉是一种研究煤的热解燃烧和结渣等方面的实验系统,可用于模拟电厂煤粉的燃烧特性。以元宝山褐煤为燃料,介绍了一维炉的结构和功能,并对系统的可靠性进行了验证,利用烟气分析仪及热重分析仪对燃烧后的尾部烟气及灰渣进行了分析测定。结果表明:尾部烟气含氧量与灰渣可燃部分剩余量均在理论计算值的误差允许范围内,说明一维炉密封良好,系统内各部分正常运行,对维炉的调试和研究具有一定的参考意义。     

Chip geometries during high-speed machining for orthogonal cutting conditions

The originality of this work consists in taking photographs of chips during the cutting process for a large range of speeds. Contrary to methods usually used such as the quick stop in which root chips are analyzed after an abrupt interruption of the cutting, the proposed process photographs the chip geometry during its elaboration. An original device reproducing perfectly orthogonal cutting conditions is used because it allows a good accessibility to the zone of machining and reduces considerably the vibrations found in conventional machining tests. A large range of cutting velocities is investigated (from 17 to 60 m/s) for a middle hard steel (French Standards XC18). The experimental measures of the root chip geometry, more specifically the tool-chip contact length and the shear angle, are obtained from an analysis of the pictures obtained with a numerical high-speed camera. These geometrical characteristics of chips are studied for various cutting speeds, at the three rake angles −5, 0, +5° and for different depths of cut reaching 0.65 mm.     

汽车构造实验网络教学辅助系统设计

为切实提高汽车专业教学水平,建立全方位教学体系,设计基于网络的汽车构造实验教学辅助系统。系统充分利用学校现有计算机网络平台,利用多媒体和网络开发技术,开发或整合多媒体资料,开辟学习交流平台,依据课程学习规律和认知特点,建立起方便快捷、生动有趣的实验教学辅助系统。该系统基于现有教材,又高于教学内容,不仅对于传授汽车zai新技术和剖析专业难点,调动学习积极性,具有重要补充和推动作用,而且对于教学示范中心创建工作,也具有重要意义。     

桃汛试验对万家寨水库冲淤影响分析

通过对桃汛试验前后两个时段对比分析,认为桃汛试验没有增加万家寨库区淤积;库区淤积形态有所调整,淤积三角洲向坝前推进,库尾段平均河底高程没有抬升.     

将硬件引入“面向对象程序设计”课程实验教学

针对“面向对象程序设计”课程实验内容的设置容易使学生产生学之无用的思想及学后不会用的问题,结合电子信息专业培养特色,压缩了传统的、基本的实验内容,增加了应用性强的实验项目,并将硬件引入实验教学。实践表明,改进后的实验教学模式效果良好。     

An ant direction hybrid differential evolution heuristic for the large-scale passive harmonic filters planning problem

This article presents a heuristic which combines the orthogonal array experiment technique and an ant direction hybrid differential evolution algorithm (ADHDEOA) for planning of a large-scale passive harmonic filters problem. The addressed problem has a multi-bus and under abundant harmonic current sources in the system. In this study, an orthogonal array is first conducted to obtain the initial solution. Next, an ant direction hybrid differential evolution (ADHDE) is applied to search for a near optimum solution. The objective is to minimize the cost of the filter, the total demand distortion of harmonic currents and the total harmonic distortion of voltages at each bus simultaneously. In order to determine a set of weights of each term in the objective function, the simplest and most efficient form of triangular membership functions has been considered. The designed heuristic ADHDEOA is applied to a practical harmonic problem in a steel plant, and three design schemes are compared to demonstrate the performance of the ADHDEOA.     

高校网络实验室建设方案探讨与设计

高校强调培养动手能力强、生产一线的技术型人才,很多高校瞄准市场对网络人才的需求,纷纷开办网络专业,但目前很多学校网络专业没有很好的实训条件的支撑,导致毕业的学生动手能力不强,不受市场欢迎的尴尬局面．针对这种现象文章论述了建设网络实验室的意义．提出建设的原则。给出满足当前网络技术需求的网络实验室典型解决方案,在此方案基础上设计了网络实验的内容．     

实验教学中虚拟实验实现技术的探讨

近年来,随着虚拟实验在教学中的应用越来越广泛,虚拟实验已经成为用现代教育技术来辅助教学的重要手段。该文通过实例来说明几种典型实现教学虚拟实验的技术,并对每种技术的优缺点以及适用性做出分析和说明。