特性

What this paper finished mainly work as follows: Five-phase hybrid step motor driver system with fixed-chopping frequency and constant total current driving is fully described. Mathematical model of the system, included the current control circuit, power driving circuit and five-phase hybrid stepping motor is established. The steady modeling of the system is established and studied. Based on the steady modeling of the system, dynamic modeling of the system is studied and single step response characteristic is constructed with MATLAB/Simulink. The simulation results, which is certified by the theory analysis, coincide with the theory analysis.

本文主要完成的工作包括几个方面：对五相混合式步进电动机恒频斩波恒总流驱动系统进行了完整的描述；建立了包括电流控制电路、功率驱动电路以及五相混合式步进电动机在内的恒频斩波恒总流驱动系统的完整的数学模型；基于MATLAB/Simulink建立了恒频斩波恒总流驱动系统稳态仿真模型，并进行了仿真；在建立其稳态仿真模型的基础上，对动态模型进行研究，并借助于MATLAB/Simulink工具建立了恒频斩波恒总流驱动系统单步响应特性的仿真模型并对其单步响应特性进行了仿真研究，仿真结果与理论分析相符。

According on the fault mechanism of driving parts of bear box, and using the multi-resolution feature and time-frequency localization feature of wavelet transform, the fault feature signals are extracted. Besides, the noise interference is eliminated by using available noise eliminating method.

根据齿轮箱传动部件故障机理，利用小波变换多分辨率特性和时频局部化特性，提取出故障特征信号；并利用有效的消噪技术，去除噪声干扰。

In order to quantify and determine the dustiness of fine and nanopowders, the standard rotating drum tester was used to determine the dustiness of two nanopowders: nano-TiO2 and fine ZnO, in the standard 1-min tests.

为了评估奈米粉体与细粉体的扬尘特性，本研究使用欧洲标准化委员会公布的标准粉体扬尘测试方法－旋转腔试验机法，测试德国Degussa公司制造的TiO2奈米粉体(型号为P25)与国内慈阳公司生产的A级ZnO细粉体的逸散特性，实验时间为1分钟。

The simulation results show that the system has good dynamic and static characteristics.

系统仿真表明，该系统具有很好的动态特性和静态特性。

The nutrition, edibility and biological characteristics of the cherry tomatoes and their cultivation technologies are summarized.

本文概述了樱桃番茄的营养特性、食用性、生物学特性，以及相应的栽培管理技术。

On the other hand, the electrical properties of MOSFETs such as IDS-VDS and IGS-VGS were investigated. The interface quality of high-κ thin films and substrate interface was investigated through subthreshold swing, gated-diode character-istics, and charge pumping methods. After analysis, some important parameters, such as the density of interface trap per area, effective capture cross section, and the surface recombination velocity (s0), were extracted.

对於金氧半电晶体的电气特性研究包含：IDS-VDS和IGS-VGS，并利用次临界摆幅、闸二极体(gated-diode)与电荷汲引法来研究高介电系数薄膜和矽之间的界面特性，经由分析可得界面缺陷密度、界面缺陷等效捕获截面积及载子表面复合速率(s0)等等的重要参数。

What often goes unrecognized is that people around, and especially below, the serially solo-successful resent the egocentricity, and may actually begin to actively undermine that person's efforts in the future.

他们不会认同周围的人，特别是自己的下属的成就，典型的自我成就主义凸显了人们的自私自利的特性，而这些特性也决定了人们在未来的成就。

This paper provides a simple, feasible way to simulate the electric characteristic of electric arc furnace.

在模拟电弧炉电弧电气特性上探索出了一种可行的、简单的方法，能够模拟出和实际电弧炉主电路相一致的外特性，能够满足电弧炉电弧控制试验的需要。

The study of motion characteristics,electromagnetic characteristics and oscillation characteristics of electrical particles are key composition of the EDM mechanism study.

电火花加工机理研究的相对滞后在一定程度上制约了电火花加工技术的进一步发展；放电通道中带电粒子的运动特性、电磁特性及振荡性的研究是电火花加工机理研究中的重要组成部分。

At the beginning of the thesis, the principle, electrical characteristic, and acoustic resonance phenomenon of the HID lamp are introduced.

本文首先介绍了高强度气体放电灯的发光机理、电特性和声谐振特性。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。