查询词典 rectangular cartesian coordinate system

To meet the common demands of the heterodyne signal process system, a phase measurement system based on dual-differential phase discrimination is studied and applied. With the frequency range of 5kHz-50kHz, this system has sampling rate of 10/sec, stability of ±0.0036°, maximum error of ±0.06°, and it can measure the zero point of phase angle.

围绕高精度外差信号处理系统的一般要求，研究和实现了基于双向差动鉴相的相位测量系统，在5kHz-50kHz的范围内、采样速率10次／秒时，示值稳定性优于±0.0036°，最大误差小于±0.06°，可以测量零相位。

Compared with traditional invasion detection system has a lot of advantages to invade the detection system distributed: Distributed IDS is that a lot of measures the land to different data sources, adopts different measuring algorithms, measure together, cooperate and deal with, has improved the accuracy measured ; But distributed IDS can be used in the extensive network environment; Distributed IDS may use the special package to be punish and audit datum safely, help the system to be produced and invade the rule of measuring and produce and unusually measure models ; Distributed IDS analyses the behaviors of a lot of control points in coordination, may measure out and attack distributed in coordination ; The measuring of distributed IDS right a certain control point can be regarded as the early warning of other check points .

分布式入侵检测系统跟传统的入侵检测系统相比有很多优点：分布式IDS是多个检测域针对不同的数据来源，采用不同的检测算法，共同检测，协作处理，提高了检测的准确性；分布式IDS却可以用于大规模的网络环境；分布式IDS可以使用专门的组件处理安全审计数据，帮助系统生成入侵检测规则和生成异常检测模型；分布式IDS协同分析多个监控点的行为，就可能检测出分布式协同攻击；分布式IDS对某个监控点的检测可以作为对其他检测点的预警。

In the document requests clearly, this system's some functions: If the arms locker or the ball medicine-chest are destructed contrary opening, this system auto-alarm; The police overtime will use the gun, the system to send the short note automatically to the police handset on, the reminder will return the gun; If this police returns the guns not on time, then after certain time limit, the information automatic transmission sub-bureau "110" the warning center,"110" will supervise it by the sub-bureau to return the gun as soon as possible; If the sub-bureau "110" has not processed in the scheduled time, the city bureau "110", the city bureau public security branch, the supervisor team will simultaneously receive the alarm message.

文件中更清楚地要求，该系统的一些功能：如果枪柜或弹药柜遭到破坏违规开启，该系统会自动报警；民警超时用枪，系统会自动发短信到民警手机上，提醒还枪；如果该民警不按时归还枪支，则一定时限后，信息会自动发送到分局"110"报警中心，由分局"110"督促其尽快还枪；若分局"110"在规定时间内没有处理，市局"110"、市局治安科、督察队会同时收到报警信息。

This study would focus on the usability evaluation of the interaction system, JoinNet, which is the most popular synchronous learning system on the market. Three approaches adopted in this study were user's hands-on test, heuristic evaluation, and questionnaires. Based on Nielsen's five usability features, learnability, efficiency, memorability, errors, and satisfaction, as the evaluation criteria, this study intended to assess the interface usability and find out the potential problems of JoinNet. According to the results of the usability evaluation, the researcher would provide suggestions for interaction system designers.

本研究焦点即在评估目前市占率极高的「JoinNet即时互动系统」之使用性，透过使用者测试、启发式评估法以及问卷调查法，以Nielsen所提出的五项使用性效标：易学性、操作绩效、可记忆性、错误率与使用者满意度，来检视此系统的使用性，以了解可能产生的使用性问题，进而根据使用性评估结果，提出提升即时互动系统使用性之建议。

The paper firstly introduces the background, the present situation and meaning of the research on the embedded system. The research of key technologies of embedded ethernet remote measure and control system is carried out in this paper. Then the author detailedly illustrates the design process of hardware and software of the embedded remote measure and control system. The design process includes the selection and configuration of the 32-bit microprocessor, the selection of the memorizer, the selection and software design of the Ethernet Controller, the realization of AD data acquisition model and DA converter model.

本文论述了嵌入式系统的研究背景、研究现状及研究意义，对基于嵌入式技术的以太网远程测控系统关键技术进行了研究，详细介绍了系统的软硬件设计过程，包括32位微处理器的选择与配置、存储器的选择、网络控制器的选择及软件设计、AD采样模块与DA数模转换模块等外围电路的实现。

The contents of the course include: what operating system are, what they do, how they are designed, and where they came from; a general history and explanations of computer system, and some discussion on hardware and the relation between operating system and other software; concept of process, process states and process control block, process queue, management of processes; concepts of sequent programming and parallel programming, process synchronization and its application, process communication; scheduling level and job state transition, job scheduling, process scheduling, and methods for scheduling; deadlock and its necessary conditions, deadlock prevention, control and recovery of deadlock; fixed partition, multiple partition and replacement partition memory management, swapping and overlays; page, segmentation and segmentation with paging storage management, basic concept of virtual memory management, and page, segmentation and segmentation with paging memory management.

课程的内容包括：计算机系统概述、操作系统的形成、发展、功能、特性、类型和发展趋势；操作系统的硬件环境、操作系统与其它系统软件的关系；进程的概念、进程的状态和进程控制块、进程队列、进程的管理；顺序程序设计和并行程序设计概念、进程间的同步与互斥、同步机构应用、进程间通信；调度的层次和作业状态转换，作业的调度、进程调度、调度算法；死锁问题的提出、死锁的必要条件、死锁的预防、避免、控制和恢复；固定分区、可复分区、多重分区内存管理技术以及覆盖技术和交换技术；分页域、分段域、段页域存储管理技术、虚拟存储管理的基本概念、分页域、分段域、段页域虚拟存储管理。

At present, pushing the indirect mercantile agency system forward is completely necessary, although there is the prescription of the relevant indirect mercantile agency system in China, it is absolute incompatible with the actual indirect mercantile agency system, this leads to the mess of the laws on the actual cases.

当前我国推行商业间接代理制是十分必要的，虽然我国有相关的商业间接代理制的规定，但是与现行实际中的商业间接代理制却十分不适应，造成了在具体案例适用法律上的混乱。

The global positioning system that is one of entire new navigation system has prominent merit which the former system is unable to match.

GPS全球定位系统作为一种全新的导航系统具有以往系统无法比拟的优点。

We introduced the existing domestic and foreign pictures retrieval system and compared with the merit, the system structure and the general processing method which had based on the content picture retrieval system.

本文介绍了现有的国内外图像检索系统，比较了基于内容的图像检索系统所具有的优点、系统结构及一般的处理方法。

Still the merit to the system can the module have done the introduction of system to this text, so that letting user can more easily understand and this system of use

本文还对系统的功能模块作了系统的介绍，以便让用户能够较轻松地了解并使用本系统

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。