测量与控制
- 与 测量与控制 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The proposed scheme distinguishes real-time traffic and non-real-time traffics, and reduces the bandwidth assigned to non-real-time call connections to provide quality of service to real-time call connections if necessary. If there were not enough free bandwidth, the existing multimedia calls could gracefully. contribute a few bandwidth to decrease the CBP and CDP while they were still at an acceptable quality degradation level.
其次讨论了区分实时和非实时业务的带宽预留的呼叫接纳控制算法,对多种媒体业务分类与特性进行了描述并给出了仿真模型;在此基础上提出了一种新颖的基于测量网络状态的动态呼叫接纳控制算法,该算法通过限制实时业务的切换呼叫掉线率低于设定的门限值,并且周期性地调整预留带宽大小以适应快速变化的网络负载状态。
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The instrument consists of highly sensitive pressure sensor, mechanical system which can produce positive and negative pressure and its control circuits, pressure measurement and conditioning circuits, the interface with PC compatible computer and analogue signal conversion circuits. This instrument can realize the idea of measuring blood viscosity during collecting blood.
该仪器包括高灵敏度传感器;可产生正负压力的机械系统及与其相关的控制电路:压力测量及转换、匹配电路:与计算机信息交换系统、控制接口及模拟信号转换电路等。
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The matching device automatic test-board is the checking tool checked the matching device capability, precision and reliability are the technique of the the matching device, the precision is the precondition of checking the matching device, the reliability is credibility degree of the decision checking consequent.the topic in view of the existing technique level, the main factors, which influence the measurement precision of the large scale test system, are analyzed in this paper, and the solutions improving the precision are put forward.1 using the multi-channel independent ac to transfer dc module, the power supply of the digit part and the simulation part is discerption, reducing the crosstalk between the digital signal and the simulated signal;2the feedback self-checking module is constructed by singlechip compositive 16 high accuracy a/d , established a closed-loop control system through this module and improved system's overall precision effectively.
匹配装置自动测试台是检测匹配装置性能的检测工具,其重要的技术指标是精度与可靠性,其高精度是作为检测匹配装置的前提,可靠性是决定了检测结果的可靠度。本课题针对现有的技术水平,分析了影响大型检测系统测量精度的主要因素,提出了提高精度的具体方案和办法:1采用了多路独立交流转直流模块,数字部分与模拟部分分开供电,减小了数字信号与模拟信号之间的串扰。2利用单片机集成的16位高精度a/d构建了反馈自检模块,通过该模块建立了一个闭环控制系统,有效地改善了系统的整体精度。
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But the development of modern control theory and technology of computer and meterage change the people s long notion of passive control and vibration reducing on rotating machanism. That is using modern control theory to active control the rotor bearing system. And then to change the design technique radically as to abstain the vibration accident.
现代控制理论和计算机技术与测量技术的发展,改变了人们长期对旋转机械被动隔振和减振的观念,即用现代控制论的思想,对转子-支承系统的振动主动的进行控制,从而在根本上改变设计方法,有效地避免振动事故。
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Some important control parameters,including the concentration of samples,the pumping rate,the ultrasonic intensity and dispersion time,and the selection of the deflocculant,are optimized for the establishment of a standard operation process for soft clay.
采用马尔文公司生产的Mastersizer Micro(MAF5000)激光衍射粒度仪测定江苏连云港地区软土的粒度分布,对样品质量浓度、泵速、超声波强度与时间、分散剂选取等控制参数进行了优化设计,确定合适的控制参数,便于对相同类型的软土测量确定标准操作规程。
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In view of these shortcomings, this frequency meter has made the radical innovation in the design, its merit is: Uses the core component is the advanced monolithic special-purpose frequency measurement component -- monolithic frequency meter, the integration rate is high, the volume is small, consumes the electricity province, function, has realized the frequency meter high integration and the microminiaturization; So long as the monolithic frequency meter adds on the crystal oscillator, the measuring range choice, the frequency demonstrated and so on the very few components then constitute DC to the 10MHz miniature basic frequency measurement electric circuit; But the biggest merit was this frequency meter has realized monolithic frequency meter, frequency sampling electric circuit and the monolithic microcomputer three between hardware and the software connection completely, caused the frequency measurement measuring range the choice, the frequency data survey, the sampling as well as the code frontier transformation and the data dump possible monolithic microcomputer software programming automatically to carry on, thus has realized the frequency measurement and the sampling work intellectualizes completely, causes this system already to be possible to constitute a miniature intelligence to measure rate the instrument core electric circuit independently, also might take in the large-scale automatic control or a test system intelligent subsystem.
针对这些缺点,本频率计在设计上作了根本的革新,其优点是:所用核心器件是先进的单片专用测频器件——单片频率计,集成度高,体积小,耗电省,功能强,实现了频率计的高度集成化和微型化;单片频率计只要加上晶振、量程选择、频率显示等很少量的器件即可构成一个DC至10MHz的微型基本测频电路;而最大的优点则是本频率计完全实现了单片频率计、频率采样与单片微机三者之间的硬件与软件接口,使得测频量程的选择、频率数据的测量、采样以及编码的边境转换和数据的转储均可能过单片微机的软件编程自动进行,从而实现了测频与采样工作的完全智能化,使得本系统既可独立构成一个微型智能测率仪器的核心电路,也可作为大型自动控制或测试系统中的一个智能子系统。
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The flow parameters, which controlled the heat transfer phenomena in the coolant channel of the piston, are identified; the experimental facilities and program will be established in accordance with the parametric conditions experienced by a real marine diesel engine. The experimental result for the flow within smooth-walled duct under the reciprocating motion will be used as the reference datum to assess the results for the study of heat transfer augmentation. As an attempt to enhance the cooling performance, the ribs will be installed in the coolant channels which flow was orthogonal mode for the piston moving direction. Finally, the results obtained for the tests with heat transfer augmentation devices will be compared with the smooth-walled test results.
本研究计画利用座标转换理论,对受到与往复运动正交方向之流场进行参数分析,建立控制此流场热传性能之参数后,模拟实际船舶主机运转时活塞之冷却情形并进行实验量测,作为评估活塞冷却之基准,然后应用现行已实用於工业界的技术,在与往复运动正交方向之圆形冷却通道中加装凸起物以增加热传效能并予以测量其热传系数及其相关之物理现象,据以讨论此流场受往复力之影响,在周向不同位置之热传情形以及其与平行於往复运动方向之流场的差异。
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This paper describes the technical features, process principle and process flow of that technique, putting emphasis on the implementation procedure of hole position arrangement, measuring control, boring and hole completion, grouting sequence, pressure treatment and hole seal. It discusses key points of construction quality control, analyzes problems occurred during the construction and puts forward treatment measures.
文章介绍了袖阀管法注浆技术特点、工艺原理及工艺流程,重点从孔位布置、测量控制、开孔与成孔、注浆顺序和压力、封孔处理等方面介绍了袖阀管法注浆实施过程,论述了质量控制要点,对施工过程中出现的问题进行了分析,并提出了处理措施。
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A three dimensional Navier Stokes equation is solved with a standard k ε turbulent model. Two experiments were carried out and the total pressure of jet flow was tested. Based on the tests, the differences between the calculated and test results were found to be 3% and 7% respectively. It proved that the results of calculation can well be used in engin...
研究采用数值计算和试验测量相结合的方法,控制方程为三维、雷诺平均 Navier- Stokes方程及 k-ε二方程的紊流模型,并且对该发动机进行了燃气流场的测试,对流场中的总压强进行了直接测量,进行了两次试验;在两次测点位置,试验结果与数值计算值相差分别为 3%和 7%;证明了对双喷管火箭燃气射流流场的数值计算具有了较好的精度,计算模拟结果可以用于工程设计中
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Main courses: satellite geodesy, error theory and data processing, physical geodesy, space geodetic techniques and applications, imaging and mapping, navigation, celestial mechanics, photogrammetry, digital image processing, pattern recognition, radio communications and navigation , digital and analog circuits, such as optimal control.
主要课程:卫星大地测量学、误差理论与数据处理、物理大地测量、空间测地技术及应用、影像与制图、组合导航、天体力学、摄影测量学、数字图像处理、模式识别、无线电通讯与导航、数字与模拟电路、最优控制等。
- 推荐网络例句
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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.
随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。
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But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.
不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。
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Closes the eye, the deep breathing, all no longer are the dreams as if......
关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。