查询词典 system

To overcome the bad effect resulting from the nonlinearity time-variability and uncertainty on autopilot system performance during the motion process of aerodynamics missile, and to further improve the flight quality of missile, the autopilot system and used control method are researched. Firstly the integrant structure of system is discussed; then baaed un introducing the traditional PID method, controllers for missile attitude motion are designed respectively using fuzzy self-turning PID method and neural network self-adaptive PID method; at last a simulation experiment is finished. By comparing the simulation results that the designed controllers have good qualities is showed, and the feasibility and validity of applying fuzzy control and neural network into automatic control of aerodynamics missile is confirmed, and the base that other nonlinear control theory can be combined with the traditional control for missile to further improve the performance of missile control system is established.

为了克服飞航导弹运动过程中的非线性、时变性和不确定性对自动驾驶仪系统性能的不良影响，进一步提高导弹的飞行质量，对自动驾驶仪系统及其采用的控制方案进行了研究；首先对系统的整体结构进行了分析，然后在介绍经典PID方案的基础上，分别采用模糊自调整PID方案和神经网络自适应PID方案设计了导弹姿态运动控制器，最后进行了仿真实验；仿真结果的对比展示了所设计控制器良好的品质，验证了将模糊控制和神经网络应用于飞航导弹自动控制中的可行性和有效性，为其它非线性控制理论与导弹传统控制相结合以进一步提高导弹控制系统的性能奠定了基础。

Based on the requisition of wireless system debugging, this paper develops a novel radio-frequency beaconing. Design method and system constitution of a novel beaconing based on PLL IC PE3336 are given, and the accomplish method of the system's hardware and software arc expounded. The test results show that the beaconing adopted in this method has a reliable and stable frequency conversion features. The more applications in the wireless system find that the users can set necessary frequency conveniently. Especial1, the friendly man-machine interface makes the operation is more flexible. It is as excellent performance-price-ratio beaconing, and as a signal source, it can be used in the research and the debug procession of variable radio-frequency components.

根据无线电数据链系统及部件的调试需要，研制开发了一种新型的以锁相环为核心、由单片机控制的射频信标机；文中给出了基于锁相环芯片PE3336的新型信标机的设计方法与系统组成，阐述了系统硬件及软件的具体实现为法；测试结果表明，利用该方法设计的信标机具有稳定、可靠的变频特性，且各项指标均达到了要求；进一步在某无线电系统中的应用发现，用户可方便地设置所需频点；特别是友好的人机界面，使用户操作更为灵活方便，是一种性能价格比优良的信标机；并可作为信源用于不同的射频部件研制与调试过程中。

In order to improve the inspection technologies of satellite interference, 5 kinds of technologies of satellite interference and integrated judgement-spectrum analysis, helix inspection, PID, S/N and signal vector were put forward. The automatic inspection system of interference of satellite TV has been built according to these inspected technologies and technology of network. The system adopts comparison of spectrum template, calibration of beaconing, mode identification, telemetering pick-up technology and improve the inspection technology of satellite interference. The alarm limits haw been defined through a lot of emulational tests, so that the system become feasible. The system has a good effect and makes up the blank of inspection technologies of interference in our country to some extent.

为了提高卫星干扰监测水平，提出了频谱监测、螺流监测、PID监测、S/N监测和信号矢量图监测等五种监测技术和干扰综合判断方法：根据这些技术手段和方法，并利用计算机网络技术，建立了卫星电视干扰信号自动监测系统；该系统利用网络化设计，采用频谱模板比对，卫星信标电平校准、信号模式识别、卫星遥测信号提取等技术，提高了卫星干扰监测的准确度和自动化程度；通过大最的仿真测试，设定告警门限，使系统的漏警率和误警率达到实用要求；该系统应用于干扰监测工作中，起到了很好的效果；在一定程度上弥补了国内通信干扰监测的空白。

At present, millimeter wave response of K wave band was applied in American BCIS system, the millimeter wave identification was used in French BIFF system, beaconing identification of millimeter wave was applied in British M-TICE system, laser enquiry and response of L wave band was used in Germanic ZEFF system.

目前，美BCIS系统采用K波段毫米波问答，法BIFF系统采用毫米波识别，英M-TICE系统采用毫米波信标识别，德ZEFF系统采用激光询问和L波段应答。

Next, this chapter analyzes the system civilization, such as norm of etiquette,"official system",astronomy, calendared system and legal system.

其次，考察了尧舜时代的制度文明，如礼制、官制、法制、天文历法等。

To deepen the reform of the judicial system, courts at various levels have strengthened the administration of justice and law enforcement, actively implemented the system of choosing and appointing presiding judges and individual jurors, fully carried out the system of public adjudication, perfected the judicial rehabilitation system, and further intensified the internal supervisory and circumscribing mechanism of the courts and the mechanism for correcting errors, thereby effectively safeguarding impartial justice.

各级法院深化司法体制改革，加强审判和执行工作，积极推行审判长和独任审判员选任制，全面落实公开审判制度，完善司法救助制度，进一步强化法院内部监督制约机制和纠错机制，有效地维护了司法公正。

In the optical system of DVD pickup, the collimating system has very important function, and its performance has large effect on design of objective lens. The collimating system of optical pickup was designed and implemented; the performance of collimating system is very good proved by experimental result.

在DVD光学读取头中，准直系统具有非常重要的作用，它的性能直接关系到整个DVD读取头的效率和物镜设计的难度，作者设计并制作了准直系统，理论分析和试验表明，准直系统具有良好的性能。

Taking the development platform of HVDC power transmission for example, the calculation result of impedance-frequency characteristic of traditional line commutated converter and that of FCC are compared. Simulation results show that the impact of impedance-frequency characteristic of converter on the resonance frequency of AC system is not negligible, and FCC can enhance the strength of AC system in a certain extent, improve system stability and effectively reduce AC equivalent impedance under resonance frequency, thus the harmonic instability of HVDC power transmission system can be avoided.

以直流输电开发平台为例，对传统电网换相换流器(line commutated converter，LCC)与FCC的阻抗频率特性计算结果进行对比，仿真结果表明换流器的阻抗频率特性对交流系统的谐振频率有着不可忽略的作用，FCC在一定程度上提高了交流系统强度，改善了系统稳定性，有效降低了系统谐振频率下的交流等值阻抗，从而更好避免直流输电系统谐波不稳定现象的发生。

The student result management system management system is the typical information system, it mainly applies to the education system, completes management which to the daily teaching, the educational administration, the teacher as well as the student computerizes.

谁能帮我翻译一下，急用的。摘要：学生成绩管理系统是典型的信息系统，它主要应用于教育系统，完成对日常的教学、教务、教师以及学生的计算机化的管理。

The primary aim of the system is to manage which carries on the guesthouse housing management to computerizes, the main function of the system includes: the guest room book, the guest room management, the staff manages, the consumable management, the system establishment, the bookkeeping management and the system help.

该系统的主要目标是针对酒店客房住房管理进行计算机化的管理，本系统主要功能包括：客房预定、客房管理、员工管理、系统设置、帐务管理和系统帮助。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。