电磁节能器及其应用

本文综合论述国内外电磁节能器的结构特点，简要介绍电磁场处理燃料油的冷态和热态试验结果，进一步探讨电磁流体阻燃效应的微观机理，电磁节能器开发与应用问题。     

应用型本科高校“涂料与涂装”课程教学改革探索

本文针对地方院校对技术应用型人才的培养及涂料行业的用人需求,讨论了高分子材料与工程专业所开设的"涂料与涂装"课程教学内容的优化,并探讨了教学方法和课程考核方式的改革,对如何提高教学质量,进行了初步的探索。     

立足理论、铸就技能——论《饭店服务礼仪》课教学

饭店需要大批高素质服务人才,且以应用型、技能型人力为主。那么技校酒店管理专业的培养目标应是技能型人才。作为技校酒店管理专业主干学科的《饭店服务礼仪》课程的教学,应以培养技能为重。本文阐述了培养技能型人才的重要性及饭店服务礼仪技能的教学方法。     

聚类分析方法在白车身装焊误差监控过程中的应用

提出一种基于聚类分析理论的白车身装焊误差源诊断方法,并完成了程序实现．该方法可较全面和准确地捕捉到车身覆盖件误差的联动性,并将其显示到车身模型上,通过观察这种联动性可方便有效的诊断误差源,与目前通用的相关分析方法相比,该方法具有明显的先进性和实用性．     

关于夹紧对工件定位作用的探讨

目前,在机械制造工艺和夹具設計方面的文献資料中,对工件在夹具中的安裝問題,多数都是将安装分成定位和夹紧两个过程分別进行讨论的。对于工件在夹具中的正确安裝位置,一般认为只是由正确定位来保証,而对于夹紧在保証工件获得正确安装位置中     

PMSM精确反馈线性化的稳速控制

为了探索永磁同步电机PMSM的输入-输出精确反馈线性化的解耦模型,以得到更好的稳速控制性能,本文首先应用最为广泛的PMSM作为研究对象,采用微分同胚变换和反馈线性化理论,适当处理负载转矩以改进PMSM及其变流器的非线性行为。然后基于PMSM的输入-输出精确反馈线性化的解耦模型,使用正交投影的概念在整个负载扭矩和转速范围内设计dq轴相电流和两个控制输入变量之间同构映射的线性化控制器,实现了PMSM全局解耦和整体线性化控制。仿真和实验结果表明该方法能够快速跟踪负载转矩和保持恒定转速,具有过冲小、静态误差小、鲁棒性强、控制精确性高等优点,并可以应用在工程实际中。     

An Improved Method to Prepare FePO_4 by Introduction of Na_3PO_4 and Its Usage for Fabricating LiFePO_4

A LiFePO_4/C composite was synthesized by a simple solid-state reaction method using glucose as reductive agent and carbon source and FePO_4 as precursor, which was prepared by introduction of Na_3PO_4 as phosphorus source and pH regulator in order to pursue lower cost and environmental protection. The structure and morphology of FePO_4 and LiFePO_4/C were investigated by X-ray diffraction(XRD) and scanning electron microscopy(SEM). Furthermore, electrochemical performance of LiFePO_4/C was investigated by galvanostatic charge–discharge tests and cyclicvoltammogram(CV). The results indicate that FePO_4 obtained has a small particle size and uniform particle distribution, which is demonstrated to be applicable as the iron source to synthesize LiFePO_4/C. Prepared LiFePO_4/C shows an excellent rate capability and cycle performance. At rates of 0.1 C, 0.2 C, 1 C and 2 C, the initial discharge capacities of 161, 158, 145 and 120 mAh/g were achieved, respectively and the discharge capacity is 154, 153, 140 and 116 mAh/g after 400 cycles. The employed method of preparing FePO_4 by introduction of Na_3PO_4 has advantages such as low cost, safe raw material, environmental benign and recyclable products, which is suitable for industrial production.     

富有现代气息的射灯水晶装饰片

奥地利施华洛世奇有限公司推出了分为Crystal Move、Crystal Emotion和CrystalBoogie等多个射灯水晶装饰系列产品,在功能、光芒或应用方面,均表现出卓越不凡的特质。从技术角度而言,射灯水晶装饰片犹如一个棋盘,将不同光源的光线投射在水晶表面,用来装饰天花板、墙壁或家具,能产生色彩缤纷、无可比拟的反射效果。