線對串接 的英文怎麼說
中文拼音 [xiànduìchuànjiē]
線對串接
英文
split pairs-
According to the quickly adjustable characteristic of the peterson coil grounding system, this dissertation proposes a new control strategy. when the system is in operation, the strategy can limit the series resonance over - voltage by using the off - resonance method. when fault occurs, the strategy can conveniently suppressing arc by rapidly adjusting the inductance value of the peterson coil to the point, which the resonance with grounding capacitance of the power network is occurred
依據可控硅控制消弧線圈接地系統的快速可控性，一改傳統的電網正常運行時調節消弧線圈接近於全補償的預調諧方法，提出正常運行時採用脫諧方法抑制串聯諧振過電壓；故障時立即調節消弧線圈電感量達到與對地電容諧振，以利熄弧的新型調節原理和方法。The system realizes multiple serial port communication and management by way of multi - port serial board ( 2 ) use the database technology to manage and manipulate the physics information data of nc tool. the basic information management system, the nc program auto - create system, the simulation of cutter working and dnc communication program are integrated to one system. it realizes the offline programming and controls of no - punched tape, helps to cut short the supplementary cutting time and improves the efficiency of to program and machine tools and realizes the separation and seamless connection of program and manufacture
本課題以硬體為輔助手段，以軟體為主要手段實現了以下功能：以串口擴展卡來實現網路中多臺數控機床的通信和管理；使用數據庫技術對數控機床的物理信息進行管理和操作，將數控機床基礎信息管理系統、 nc程序自動生成模塊、刀具加工軌跡模擬模塊和dnc通信介面模塊集成為一體，實現了數控加工的離線編程和數控系統的無帶控制，提高了編程效率、質量，縮短加工輔助時間，提高了機床的效率，既實現了編程和加工的分離，又達到它們之間的無縫連接。The type of wireless transmission detaches the part of data acquisition from the part of data processing in order to improve the monitor system upon the practicability and security for the person. the universal serial bus is a kind of newer bus interface ' s criterion than other buses in the computer ' s technology. in the design, the universal serial bus is used as the interface between the system and the computer that makes the design possess a lot of features, such as easy operation, plus and play, none of exter nal power, and need not to install
無線數據傳輸方式將數據採集部分與處理部分分開，提高了監護系統的實用性和對人體的安全性；通用串列總線是一種較新穎的計算機總線介面規范，本系統使用通用串列總線作為系統與計算機的介面方式，使得本系統具有操作簡便、體積小巧、即插即用、支持熱插拔、無須外接電源、使用無須安裝等特點。Through analysising the characteristics of the power system with floating neutral point deeply, the paper puts forward a new plan of single - phase to ground fault line selection on the base of s ' s signal injecton method and gives the hardware and software design. in this design, the high speed sampling and data processing is carried out through using dsp processor ; the large electrice current is drived through the application of a high - performance audio power amplifier and transformer ; the communication between host computer and detectors is realized through rs485 bus technology ; the difference multilevel frequency - selected amplifier is designed and the feeble signal of space is sampled on the base of the theory of magnetic induction ; the interface between dsp and exterior chip and rs485 interface logical is designed through using fpga ; the using of lcd module and keyboard interfacing chip makes the interface between human and machine ; the programme of host computer and detectors is designed through using blocking design method
在本設計中，採用高速的dsp處理器，實現了對故障特徵信息的高速採集與處理;採用大功率的功放晶元與變壓器配合的方法，實現了大電流信號的驅動輸出;採用485總線技術，組建了裝置主機與多探測器之間的主從式通訊網路，實現了多干擾條件下裝置主機與多探測器的可靠通訊;設計了差分式多級選頻放大電路，採用磁感應的方法實現了對空間微弱信號的接收;利用fpga技術，實現了控制器與多外設的介面及數字信號的串並轉換;採用了先進的lcd液晶顯示模塊及鍵盤介面晶元，設計了人機信息交互的介面;採用了模塊化的軟體設計方法，開發了裝置主機及探測器的軟體程序。Before the connectting between moden and other equipments, it works at the cammand mode, the cammand that is send to moden is used to set or manipulate the mode, after the connectting between moden and other equipments, it works at connectting mode, at that time, the cammand send from the computer is send to another computer which will pass the moden and telephone line. the moden control cammand is called " at " cammand, all the control manipulation is realized by sending the ascii character to moden, after the moden received the " at " cammand, it firstly judges the cammand, secondly, it analyses and executes the cammand, finnally, it executes a response by sending back a ascii character, during the deseign of below - computer, we introduce in detail the deseign of system hardware and system software, below - computer system hardware and system software, below - computer is made up of microchip collecting and controlling system, which finish the strobe and water level data collection, display and disposal, deal with the communication with the above - computer, the microchip is the centre of data dealing with, the peripheral equipments are made up of data collecttion module, control cammand input module, display module, execute output module, and long - distance communication module
在moden控制軟體的設計中，詳細敘述了moden正常工作時的幾個重要函數：初始化函數、撥號處理函數、應答處理函數、掛機處理函數，設計並調試了四個函數的通信程序，數據機工作時存在兩種模式，命令模式與連線模式，命令模式是針對功能設置的模式，連線模式是數據傳輸的模式。當數據機未與其他設備連接時，其處于命令模式，這時候下達給數據機的指令是作為數據機本身設置或操作用的；當數據機已經與其他設備連接時，其處于連線模式，所有在此時由計算機送至數據機的信息都將經由電話線傳送到另一部計算機上。專門使用於控制數據機的指令集被稱為「 at指令集」 ，對moden的所有操作（如撥號、應答、掛機等）都可以通過給moden發送ascii字元串來實現， moden在收到at命令后，先對命令進行判斷，接著分析和執行命令緩沖區中的命令，最後以自身的ascii字元對命令作出響應。Aim at the dtc ' s blemish mentioned above and the direction of dtc technique development, the dissertation put great emphasis on the work as follows, with an eye to exalt dtc system function : ( 1 ) a new speed - flux observer of an induction motor is proposed to enhance the accuracy of flux observing, which is an adaptive closed - loop flux observer and different from the traditions. a new adaptive speed - observation - way is deduced out according to the popov ' s stability theories ; ( 2 ) to improve the performance of dtc at low speed operation, we have to exalt the accuracy of the stator flux estimation and a new way of bp neural network based on extended pidbp algorithm is given to estimate and tune the stator resistance of an induction motor to increase the accuracy of the stator flux estimation ; ( 3 ) digital signal processor is adopted to realize digital control. an device of direct torque control system is designed for experiment using tms320lf2407 chip produced by ti company ; ( 4 ) bring up a distributed direct torque control system based on sercos bus, sercos stand for serial real time communication system agreement which is most in keeping with synchronous with moderate motor control ; ( 5 ) the basic design frame of the hardware and software of the whole control system is given here and some concrete problem in the experiments is described here in detail
針對上面提到的直接轉矩控制的缺陷和未來直接轉矩控制技術發展方向，本論文重點做了以下幾個方面的工作，目的在於提高dtc系統的綜合性能： （ 1 ）提出一種新型的速度磁鏈觀測器，新型的速度磁鏈觀測器採用自適應閉環磁鏈觀測器代替傳統的積分器從而提高磁鏈觀測的精度，並且根據popov超穩定性理論推導出轉速的新型自適應收斂律； （ 2 ）改善系統的低速運行性能，主要從提高低速時對定子磁鏈的估計精度入手，提出了一種提高定子磁鏈觀測精度的新思路? ?利用基於bp網路增廣pidbp學習演算法來實時在線地修正定子電阻參數； （ 3 ）採用數字信號處理器dsp實現系統全數字化硬體控制，結合ti公司生產的tms320lf2407晶元，設計了直接轉矩控制系統的實驗裝置； （ 4 ）提出了基於sercos總線網路化分散式的直接轉矩控制系統， sercos （ serialrealtimecommunicationsystem ）是目前最適合同步和協調控制的串列實時通信協議； （ 5 ）基本勾勒出整個控制系統的硬體和軟體設計基本框架，詳細描述一些實驗中的具體的細節問題。This card largely depends on three integrate chips to fulfill its function : 1 ) nic control main chip, corresponding the mac sublayer of ethernet, to realize csma / cd media access protocol, manage the sending and receiving buffers integrated on the chip and provide motherboard pci interface. 2 ) serdes ( serializing and deserializing ) chip, corresponding pcs and pma sublayers in ethernet, mainly to complete 8b / 10b coding and convert 10 bits parallel data to serial data, and convert them again at the receiving end. 3 ) fibre transceiver unit, completing light - electrical conversion of seri
該網卡主要由3塊集成的晶元完成其功能，分別是i ）網路控制主晶元，對應于以太網的mac子層，主要完成csmaicd介質訪問協議，管理片上集成的發送和接收緩沖區，並提供和主板p0總線的介面： b ） s rd s （串列解串列化器）晶元，對應于以太同的pcs和pma子層，主要完成sb lob編碼並將10位并行的數據轉換為串列數據，在接收端完成相反的功能：涌）光纖收發器，完成串列數據的光電轉換功能。Not only fault model, but also test arithmetic demand to be farther improved. the thesis, focusing on the 20 - port register file, makes a fault analysis, particularly in complex bridge fault and crosstalk coupling fault aroused by word - line and bit - line of 20 - port
本文針對所設計的寄存器文件進行了故障分析，特別對20埠字線、位線引起的復雜橋接故障和串擾導致的耦合故障進行了詳盡論述。Transmition velocity relys on the style of encode and modulation essentially during modern data transmition for the quality of using line bandwidth and the immunity of code ties on them tightly. but it is important that the velocity of data transmition reaches its limitation in fact for the interface of environment and cross - talk. so for the improvement of transmition velocity, we must analyze the characteristics of noise signal and the model of line deeply and then take some useful measures to better the immunity of modulation wave
在現代通信的數據傳輸過程中，傳輸速率本質上是由傳輸的編碼方式和調制方式決定的，因為編碼方式和調制方式直接決定了線路頻帶利用率和碼元抗干擾能力的好壞，因而直接決定了傳輸速率；但是在實際應用過程中，數據傳輸速率是不可能達到理想狀況的，因為環境干擾、串音干擾等因素的存在使得線路的頻帶不可能被完全利用起來；因此，必須認真分析線路的噪聲信號的特性以及噪聲線路的模型，以便在編碼方式和調制方式中針對性的做一些改進措施以改善調制波形的抗干擾能力，使得傳輸速率能夠進一步提高。The computer program is designed by visual c + +. the mscomm controls are added to receive the data. the rotor speed, the axis track and limited speed can be measured, and the curves can be displayed on the computer
我們用at89c52作為微處理器，採集信號並進行相應的處理，通過一條串列總線傳給上位機，上位機的軟體由visualc + +編制，採用多個mscomm控制項對各個實驗項目的數據進行接收，可在線完成轉速、軸心軌跡及臨界轉速的測量，並繪制曲線。For recent years, adsl has world widely employed and widely used in many aspects such as vod, remote medical treatment and e - shopping etc. but we noticed that the traditional telephone networks are designed for the transmission of low frequency signals, and the adsl ' s frequency rang is from 0 to 1. 104mhz, so we must confront the signal attenuation, the loop line noise impairments, the crosstalk interferences, the bridge tap reflections and the rf disturbances problems and many other problems when transmitting the adsl signals one the telephone networks
近幾年來， adsl在世界范圍內得到充分的使用，廣泛應用於視頻點播、遠程醫療、網上購物等各個方面。但是由於電話線網路是專門為傳輸低頻信號而設計，而adsl的頻譜范圍在0 1 . 104mhz內，因此在傳輸adsl信號時，面臨著信號衰減、線路噪聲、串音干擾、橋接抽頭反射和射頻干擾等等多方面的問題，這就要求在adsl開通之前對線路進行一系列的測試。It can interface with single chip computer expediently and transmit data by rule and line. oscillator in the infrared transmitting circuit that consisted of ne555, and can used to modulates the output from serial port of single chip computer. the integrated infrared receiver can demodulates, filter and transmit the signal to single chip computer
紅外線西北口二j匕大學悶成d匕學位咭侖文發送電路的振蕩器由ne555構成，它可對串列口輸出信號進行調制，一體化的紅外接收頭對紅外信號進行解調、濾波和整形，再送單片機處理。Discussing the network - control function of inverters with two kinds of methods : one is computers control inverters basing on the self - definition protocol through rs485 serial port ; the other is connecting the inverter which is controlled by the master to the fieldbus network through interfaces
對于交流變頻調速器的網路控制功能討論了兩種方式：一種是用上位機通過rs485的串列通信以自定義協議控制交流變頻調速器；另一種是用總線通信適配器將交流變頻調速器掛接在現場總線網路中由主站進行控制。The paper explains the method of the petersen coil parameter selection and expatiates the working principle of micro - computer controller. new methods of on - line measuring of the capacitive current and the control of the series resistance are put forward ? which lead to the integration of the automatic resonance and the faulted line selection in a compensating network
文中說明了消弧線圈參數的選擇方法，闡述了微機控制器的工作原理，提出了在線測量補償電網對地電容電流以及控制串聯電阻的新方法，實現了補償電網自動調諧與單相接地選線的一體化。At present, there are various methods of moving vehicle detector and identification. the system we designed for traffic information makes use of the principle of electromagnetic induction and radio frequency identification the moving vehicle detector, which is based on inductive circular loop, detects the information of vehicle according to the inductive signal. the basic information including speed and go through time can be detected to analyze oscillator frequency
目前現行的車輛檢測與識別系統的種類繁多，本系統基於電磁感應理論和射頻識別技術，採用環形線圈作為數據採集傳感器，通過對振蕩器的頻率計數測量到車輛的通過、速度等基本信息，同時啟動射頻識別系統，使讀寫器與安裝在車輛上的非接觸ic卡進行無線通訊獲取通過車輛的類型和所屬用戶等數據，並將有關數據通過rs232串口送至上位機。This thesis adopts 8psk / qpsk modulation mode that ' s widely applied in short - wave communication to research all - digital blind receiver in burst mode based on software radio technology. then related solutions are given for the doppler frequency shift problem and multiple fading problem in short - wave channels. the arrangement of the thesis is below : chapter 1 gives brief description for the new technology and new systems of short - wave communication and for the development and appliance of software radio
本文採用短波通信中應用廣泛的8psk qpsk調制方式，研究基於軟體無線電技術的突發模式全數字盲接收機，並對多音并行及慢速傳輸中存在的多譜勒大頻偏問題、單音串列、高速數傳時在短波通信鏈路中發生的干涉衰落問題做了研究，提出了相應的解決方案。Test method for " f " connector return loss in - line pair
" f "連接器回波損耗串聯線對的試驗方法Firstly, in wireless environment, receiver has no know the time delay between transmitter and itself. in ofdm system, ofdm data is transmitted as one symbol, so in order for correct demodulation, the correct start of symbol should be got from ofdm system to reduce the effect of isi. secondly, the high frequency utilization in ofdm is based on the orthogonal properties of sub carriers. if frequency offset is generated, the orthogonal properties among sub carriers will lost, that will cause inter carrier interference ( ici ) and high ber of system
Ofdm技術也存在著一些缺陷，首先，在無線環境中傳輸的ofdm信號對定時要求高，為了減少碼間串擾（ isi ）影響，必須從接收信號中提取出正確的符號起始位;其次， ofdm系統對頻率偏移敏感， ofdm技術的高頻譜利用率和傳輸可靠性均以子載波的正交性為基礎，如果接收機和發射機之間發生頻率偏移，子載波之間就會失去正交性，導致嚴重的子載波間干擾（ ici ） ，降低系統性能。Use fiber for any connection to a switch or server, and for any gigabit connection that requires a cable run exceeding 100 meters or that flows through an area in which radio interference, crosstalk, or attenuation might be a problem
對于任何一個交換機或服務器的連接，或超過100米的任何千兆連接，都要使用光纜，如果一個連接可能通過有無線電干擾、串音、衰減等問題的區域，該連接也要使用光纜。分享友人