查询词典 the metric system

ABSTRACT Discrete Event System is a kind of complex system characterized with asynchronism, concurrency, interaction, etc.

离散事件系统是一类异步、并发、交互影响的复杂系统，有关离散事件系统理论与控制的研究已有近二十年的历史，随着计算机技术和控制理论的发。。。

The foundation of this system provides a good reference to promote the standardization and intelligence of the overhaul and maintenance of vacuum switches. This paper develops a special HF pulse power supply for internal pressure estimation, which achieves the output of HF-HV sinusoidal pulse wave whose frequency and amplitude can be modified respectively, and meets the design requirements according to the results of Simulink simulation and practical experiments. With the help of AT89S52, this paper designs an I~2C serial bus based signal detection system for peak value signal acquisition of HF pulse currents, which communicates with the upper computer by asynchronous serial communication for uploading the data. In the upper computer, a human computer interface is developed by Matlab software, whose functions are to do some computation and graphic display, such as calibrating the relation curve of vacuum degree and peak value of HF pulse currents, vacuum degree computation, and vacuum lifetime evaluation analysis basing on grey forecasting model as well as making relative suggestions.

本文研制了用于真空度检测的高频脉冲电源，通过Simulink仿真和试验检验其满足设计要求，实现了电压幅值和频率独立可调的正弦波高频高压脉冲输出；利用以AT89S52为核心基于I~2C串行总线的信号检测系统实现高频脉冲电流峰值信号的采集，通过异步串行通信实现单片机与计算机之间的数据通信，将检测数据传至上位机；在上位机利用Matlab开发人机交互界面，实现相关数据处理和图形显示，包括真空度——高频脉冲电流峰值关系曲线标定、真空度数值计算、基于灰色预测模型的真空寿命评估分析和提出相应决策建议。

Synchronized phasor measurement of electric power system ; ethernet ; asynchronous transfer mode; supervisory and control system ; phase measurement unit

电力系统同步相量测量；以太网；异步传输模式；监控系统；相角测量装置

Petri net is a kind of computer system model to describe asynchronous and intercurrent system.

Petri网是适合于描述异步的、并发系统的计算机系统模型。

This system is at the request of library but a management information system that design.

本系统是应黄海市某某图书馆的要求而设计的一个管理信息系统。

The paper describes the design and implementation about network monitoring system, which is based on Army ATC system.

本论文结合所在单位承担的军航ATC项目，以网络监控子系统为对象，描述网络监控系统的设计和实现。

Now, we mostly discuss the direct athwart welding machine in this article. We will use the silicon semiconductor of IGBT to control the system. so there are a lot of advantages in the system.

而在此文中我们主要讨论的是逆变直流焊接机，同时这里应用了先进的IGBT可控硅半导体管来进行控制，所以它拥有软开关技术的诸多有点。

The results show that this detection system has a better atomic number contrast than the detection system in the conventional scanning electron microscope.

结果显示该探测系统比常规电镜中的探测系统具有更高的成分衬度，因此在靶成分的分析中有广阔的应用前景。

We propose an fair and atomicity micropayment system on the well-known Millicent system, which is capable of performing off-line authentication and has the advantage of high execution speed.

本论文以Millicent小额付款系统为基础，提出一个具有交易公平性和交易单元性等标准的微支付系统。

Introduces a type of special honer repairing hydraulic support cylinder using coal mine and other mine,main discuss its composing of hydraulic system,working principle,technics process,electrical control system and relation about each other lock moment,beeline move forword timing method,and its characteristic, attainability purpose using this machine.

介绍了一种用于煤矿或其他矿山的单体液压支柱维修专用珩磨机，重点讨论了该机的液压系统组成、工作原理、工艺过程、电气控制系统、运动互锁关系、直线进给调速方法以及特点，采用该机可达到的目的。

Objective To investigate the relationship between ovum fertilization rate and sperm morphology, acrosome reaction in IVF and to explore the influence of parameters of sperm on fertilization rate.

目的 研究体外受精(in vitro fertilization，IVF)中精子形态、顶体反应与卵子受精率之间的关系，分析精子各参数在IVF受精率方面的参考意义。

A: I hear Mr. White wants to run for the Presidency!

我听说怀特先生要参加总统竞选！