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plc     
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  可编程控制器
    The Application of PLC for Controlling Patterns in Lost Foam Casting
    可编程控制器在实型铸造泡沫模成形中的应用
短句来源
    Application of PLC in Automatical Reciprocating System for Timber Yard
    可编程控制器在木片堆场自动往返系统中的应用
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    The Method Research of Extension I/O Point in PLC
    可编程控制器I/O点扩展方法研究
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    Application of PLC in the Inner Tube Equivalent Vulcanized Control
    可编程控制器在内胎硫化中的应用
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    Application of PLC in Mine Hoist
    可编程控制器在矿井卷扬中的应用
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  可编程序控制器
    The Application of PLC in the Slitter Winder's Tension Control
    可编程序控制器在复卷机开卷恒张力控制中的应用
短句来源
    Reversible and Braking Control of Double-Loop Cascade Speed Regulation System Using PLC
    用可编程序控制器实现双闭环串级调速系统的可逆和制动控制
短句来源
    Functions extensions of series F crane remote control device with application of PLC
    用可编程序控制器实现 F 系列起重机遥控器的功能扩展
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    Design Display Meter with Communication Technology Between INTEL 8031 Single Clip Microcomputer Systemand PLC
    利用可编程序控制器编程口与 8031 单片机实现数据显示
短句来源
    The paper introduces the design of the control system of water level based on MCGS configuration software and FX series PLC of the corporation of Mitsubishi Electric and also gives the design of its hardware, software and the process of configuration.
    本文介绍了基于MCGS组态软件与三菱公司FX系列可编程序控制器的水位控制系统设计,给出了水位控制系统的硬件组成、软件设计和组态过程。
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  可编程逻辑控制器
    This article firstly introduces the basic structure,application characteristics and work principle of Programmable Logic Controller(PLC). Then on these basis,the application fields of PLC are covered,and the development history, development status quo and development trend of PLC are also described.
    首先介绍了PLC(可编程逻辑控制器)的基本结构、应用特点以及工作原理,然后在此基础上介绍了PLC的应用领域,并描述了PLC的发展历史、发展现状以及发展趋势。
短句来源
    As S7-300/400 series PLC(Programmable Logic Controller) is node controller based on field bus net,it is difficult to develop the communication software on Lab Windows/CVI platform for its privacy of communication protocol.
    西门子S7-300/400系列可编程逻辑控制器(PLC)是基于现场总线网络的节点控制器,其通信协议不开放增加了在Lab Windows/CVI等平台上开发通信驱动软件的难度。
短句来源
    The control system can automatically start and switch between the two speed of the Generator and automatically protected by using Programmable Logic Controller (PLC), touch panel and industry control computer.
    本控制系统采用了可编程逻辑控制器(PLC)、触摸屏和工业控制计算机等设备,实现了风力发电机组的自动起动、自动进行高低速电机之间的切换、自动保护等功能,使该风力发电机组能够在长期无人值守情况下安全运行。
    Application of PLC to the Point - position Control in the Digital Control System
    可编程逻辑控制器(PLC)在数控系统点位控制中的应用
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    The Application of PLC in Ash Removal System
    可编程逻辑控制器(PLC)在除灰系统中的应用
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  plc控制
    Ironing and Emobossing Presses for Leather and PLC Control
    皮革熨平压花机及PLC控制
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    PLC Control of Electrical System for Aircraft Engines
    航空发动机电气系统的PLC控制
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    Application of PLC in the Expand-Slicer of Automatic Prossing Machine Tool
    PLC控制技术在自动机床扩切机中的应用
短句来源
    A Multipurpose Sterilizer Controlled by PLC
    采用PLC控制的多功能蒸气灭菌器
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    The PLC Control of Plastic Accumulator by Heating-Sealing
    塑料蓄电池热封机的PLC控制
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      plc
    The coupling ratio of the two MMI couplers deviates from 50:50 but the deviation is nearly the same, which is decided by good uniformity of semiconductor planar lightwave circuit (PLC) process.
          
    This study aims to investigate the clinical response of ATP tumor chemosensitivity assay (ATP-TCA) directed chemotherapy regimens delivered via hepatic artery infusion in 104 cases of primary liver carcinoma (PLC).
          
    In the control group, 30 cases of diagnosed PLC were given the conventional three-combination drug.
          
    In short, ATP-TCA directed chemotherapy shows better results for terminal stages of PLC in that you can decrease the dose of drugs thereby reducing the side-effects with possible improvements in therapeutic effects.
          
    Uni-axial tensile deformation of LA41 magnesium alloy has been carried out and the Portevin-Le Chatelier (PLC) effect, also known as serrated flow or plastic instability, is observed.
          
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    In this paper, a new carrier generation system-PLC frequency synthesizer is presented .This system can be used to improve the technical performance of power line carrier equipment as an application example of phase-losked techniques in power system communications. The principle of type DK-3 frequency synthesizer is briefly described and the design of loop parameters is introduced. Finally, the experiment results are given.

    本文提出一种新型载频供给系统——频率合成器。该系统是为改进电力线载波设备技术性能而研制的,是锁相技术在电力系统通信中的应用一例。本文说明了DK-3型频率合成器的基本原理,介绍了其环路参数设计,最后给出实验结果。

    Alongside the growth of power supply in 220kV network in Anhui province (jn China) .intermediate substations were set up on several long transmission lines, thus breaking the whole line into shorter ones. Correspondingly, the number of double circuit lines increased.with regard to power line carrier communication, the number of broad band width line traps and coupling filters installed at terminals and intermediate bridging circuits should also increase. As a result, the quality of carrier channel declined....

    Alongside the growth of power supply in 220kV network in Anhui province (jn China) .intermediate substations were set up on several long transmission lines, thus breaking the whole line into shorter ones. Correspondingly, the number of double circuit lines increased.with regard to power line carrier communication, the number of broad band width line traps and coupling filters installed at terminals and intermediate bridging circuits should also increase. As a result, the quality of carrier channel declined. In bad weather condition, the PLC communication may be interrupted.This paper makes a survey of the causes of the increase of Overall attenuation of PLC channel due to the change of line configuration, For this purpose, the following factors are analyzed in delail:(1) the mismatch between input and load impedances dut to the shortening of direct transmission distance, (2) terminal states (in overhaul or cold stand by vs.in operation); (3) the operation mode of double-circuit lines; (4)the effect of broad baudwidth line traps and coupling filter.

    随着220千伏电网供电密度的扩大,在一些长距离的输电线路上多处开断,新建了一些中间变电所,线路距离变短。平行(或同杆)架设的输电线路也相应增多。在网络结线复杂的220千伏线路上组建载波通道,终端和中间桥路所采用的宽频结合加工设备(指阻波器和结合滤波器)数量随之增多。由电网结线变化所产生的电气短线、线路终端状态、平行线路运行方式的变化和宽频结合加工设备附加衰耗对载波通道总衰耗的影响,致使部分电路的实际通道衰耗远远超过了计算值。造成电路质量和运行可靠性下降。在恶劣的气候条件下,甚至会中断通信电路。针对这种情况,我们结合近年来的220千伏线路载波通道的运行实践,对电网结线变化所造成的载波通道总衰耗普遍增大的几个因素进行了分析。

    It is well shown that the frequency band of a PLC system is restricted. As transmission channels are increased in number,repeated use of same frequency at different parts of asystem is an encountered problem,which can be settled by the adoption of frequency blocking filter (FBF) This paper make a study of FBF used for this purpose.The paper deals with its design method,circuit optimization,CAD and some other pro- blems.A CAD program used in authors′ design is given.A new decou- pling circuit with low impedancec...

    It is well shown that the frequency band of a PLC system is restricted. As transmission channels are increased in number,repeated use of same frequency at different parts of asystem is an encountered problem,which can be settled by the adoption of frequency blocking filter (FBF) This paper make a study of FBF used for this purpose.The paper deals with its design method,circuit optimization,CAD and some other pro- blems.A CAD program used in authors′ design is given.A new decou- pling circuit with low impedancec and wide frequency band is proposed. Cross Attenuation vales of FBF in various cases are analyzed and calcu- lated.The influense of bus capacitance and load impedance on the cross attenuation and input impedance are also compared.

    本文对电力线载波系统频率阻塞滤波器的原理、设计方法、电路优化、计算机辅助设计程序等方面的内容进行了分析和讨论。文中提出了一种去耦电路,具有阻抗低、频带宽的特点。还通过计算实例,分析、比较了母线电容、、负载阻抗对频率阻塞滤波器跨越衰耗及输入阻抗频率响应的影响。

     
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