very high speed data 中文意思是什麼
very high speed data
解釋
特快數據-
As a new interface caters for rapid development of computer peripheral equipment, universal serial bus ( for short usb ) dispels astriction of communication through traditional serial port and parallel port. it is very suitable for real time image data transmission, which requires high speed. this theme describes two - circuit systems, which utilize usb interface to data from a digital image sensor to pc
為了迎合計算機上設的快速發展以及消除計算機外設通過串、並口的通訊的局限性，出現了新的計算機外設介面usb （通用串列總線） ，這種新型介面對于實時的視頻傳輸很適用，本文設計了兩套電腦眼基於ez - usb2131q的usb介面系統。 -
Due to the characteristics of the powerline channel, the plc system is different from the common wire network and makes high - speed data transmissions very challenging
本文主要在就以電力線網路為基礎的家庭網路的調制技術、媒質接入控制（ mac ）協議和tcp協議方面進行了探討。 -
After that, the hardware circuit, especially some of the key parts, is investigated in detail. the following processes are also investigated in detail : empoldering the four fold - frequency subdivision 、 direction - judgment 、 counting and flip - latch of the data with vhdl ( very high speed integrated circuit hardware description language ) ; empoldering the serial interface and the data collection software in pc with borland c + + builder
接下來詳細介紹了使用vhdl語言開發fpga晶元的細分、辨向、計數、鎖存以及串列傳輸處理等全部功能;用borlandc + + builder開發了pc機上的串列介面、數據採集軟體;設計並製作了fpga晶元及其外圍電路的電路板。 -
Using ordinary modem, the data transmission speed under the current existing twisted pair access copper telephone lines network for voice communication is limited to 56kb s, which is totally inadequate for high volume data transmission. even using the adsl technology, the maximum transmission speed can only be increased up 6mb s. to surmount this problem by providing optical network access directly to all users ? home and offices not only involve very high cost but also extremely time consuming engineering work
現存原來用作話音通訊的雙絞銅線電話固網，在利用現時普通的modem情況下，數據傳送速度僅為56kb s即使利用較先進的adsl技術，其最高速率亦只有6mb s ，不足以應付高容量資訊的傳輸然而要做到光纖入戶，不但成本高昂，而且工程所需之時間漫長。 -
Using ordinary modem, the data transmission speed under the current existing twisted pair access copper telephone lines network for voice communication is limited to 56kbs, which is totally inadequate for high volume data transmission. even using the adsl technology, the maximum transmission speed can only be increased up 6mbs. to surmount this problem by providing optical network access directly to all users ? home and offices not only involve very high cost but also extremely time consuming engineering work
現存原來用作話音通訊的雙絞銅線電話固網，在利用現時普通的modem情況下，數據傳送速度僅為56kbs ；即使利用較先進的adsl技術，其最高速率亦只有6mbs ，不足以應付高容量資訊的傳輸；然而要做到光纖入戶，不但成本高昂，而且工程所需之時間漫長。 -
In this paper, a high integrated and intelligent digital dsp - spm system is developed based on the nspm6800 spm manufactured by the beijing zhongke mechanical & electrical equipment co. at present, the pc of spm system is burdened with not only sending and receiving data, but also disposing of image, which hinders the enhancement of speed of the system. in addition, as the function of spm is expanding, including tappingmode afm, efm, mfm, scm, etc, one hand, it amplifies the range of the application of spm, on the other hand it also means that the task of autocontrol and data transfer heavier. the advantages offered by the dsp compared to analog systems include considerable flexibility in the choice of the signal processing algorithm and greater ease in managing control parameters by the host computer, which are very important for the improvement of spm
本課題以北京市中科機電設備公司的nspm - 6800型掃描探針顯微鏡為基礎，重新設計了以dsp為控制核心的控制系統，主要解決原系統存在的以下問題： （ 1 ） pc機既要實時控制數據的採集與發送，又要進行圖像的后處理，整個系統的實時性難以達到要求； （ 2 ）隨著spm功能的擴展，一方面包括輕敲式原子力顯微鏡、電場力、磁場力、掃描容場顯微鏡等技術在內的spm技術擴展了儀器的測試范圍和功能，另一方面也意味著自動控制量的增加和數據處理量的增加； （ 3 ） 16位a d 、 d a都採用的是購買的板卡，也通過isa槽插在pc機內，成本高，不利於擴展； （ 4 ）另外，數字板通過isa槽插在pc機內，易受于擾，而且給安裝帶來不便。 -
At present, ip based network is becoming more and more popular in daily life and commercial operation. however, the traditional sdh equipment could not provide high speed and low cost data service and it ' s not economical of investing too much on new equipment and withdrawing the primary investment. furthermore, the entire digital network cannot fulfil the existing traditional operation. so how to inosculate ip based data network and sdh network becomes a very inportant and pratical technology
現在，應用ip技術的數據網路在日常生活和商業運作中變得越來越普遍，而傳統的sdh設備不能提供高速率、低成本的數據業務；同時要對新設備進行可觀的投資和撤出對現有sdh設備的投資，把sdh網路重組成一個純數據網路也不經濟；而且純數據網路不能經濟地實現現有的傳統業務，如固定帶寬的租用線業務和話音業務。 -
Mpls does not replace ip routing, but will work alongside existing and future routing technologies to provide very high speed data forwarding between label - switched routers ( lsrs ) together with reservation of bandwidth for traffic flows with differing quality of service ( qos ) requirements
Mpls並沒有代替ip路由，但是它將和現有的以及將來的路由技術一起在標記路由器之間高速交換數據，並且根據需要提供不同的服務質量。 -
The data - sampling section completes analogue - to - digital conversion using fpga and high speed adc, then transmits these data to processing communication equipment in some format. because fpga has high speed processing capacity, this section can obtain very high sampling rate
數據採集部分採用現場可編程門陣列（ fpga ）作為與模數轉換器件（ adc ）的介面，在單晶元內實現了同步采樣控制、數據編碼傳輸的功能。 -
The underwater acoustic channel is very complex where cochannel interference, doppler frequency offsets, narrow bandwidth and time and frequency selective deep fades obstructs the development of high speed and fidelity underwater data transmissions. thus projects of high speed and fidelity underwater signal transmissions become a hotspot in the fields of world academic circles. the conventional serial communication must use adaptive equalizer to combat the multipath in real - time
海洋水聲通道是一種極其復雜多變的時-空-頻變參通道，其通道窄，強多途干擾，信號起伏衰落嚴重，一直是水下信息可靠高速傳輸的主要障礙，因此如何在水聲通道中高速率準確地傳輸數據，就成為世界性的熱門課題。 -
In the flight experiment of aircraft, the mass data acquisition, storage and transfer is always one important part of system, especially for the measurement of parameters such as temperature and pressure of cockpit. in order to meet these needs, we design this simultaneous data acquisition system with multi - channel and large - capacity, which is based on single chip microprocessor and usb interface. it overcomes some shortcomings of traditional devices such as : big size, short work time, small memory capacity etc. it also has many advantages of high speed, low power dissipation, ease - of - use, ease to expand port, supporting plug - play, low - cost etc, so it will be used very widely
在飛機的飛行試驗中，海量數據的採集、存儲和傳輸一直是系統非常重要的一部分，尤其是對飛行員駕駛艙環境控制系統的溫度、壓力等參數的測量來說更是如此。本文根據課題實際需要，研製的基於單片機和usb介面的多通道、大容量、便攜式數據採集系統，克服了現有設備體積大、工作時間短、存儲容量小等缺點。同時，本系統還具有功耗低、速度快、使用方便靈活、易於擴展、支持即插即用、成本低廉等一系列優點，具有廣泛的應用前景。 -
As more and more users ' usage patterns evolve to include more and more bandwidth intensive networking applications such as data browsing on the world wide web ( www ), java applications, video conferencing, etc., it emerges an acute need for very high bandwidth transport network, whose capabilities are much beyond those that current high speed ( atm ) networks can provide
隨著越來越多的用戶應用網路模式的發展，如因特網瀏覽、視頻點播、視頻電話等需要巨大網路帶寬的通信業務的應用，迫切需要一個信息容量大大超過現有的高速網路（如atm ）的網路。而基於波分復用技術的全光網路則充分滿足了現代網路通信帶寬需求，並具有很好的網路性能。 -
Usage would include tasks like recursively searching files for virus patterns, searching databases for keys or data, text and word processing and any other task that requires handling large amounts of data at very high speed
這種演算法的用途包括採用遞歸方式搜索文件中的病毒字元串，在數據庫中搜索關鍵字或數據，文本和單詞的處理，還有其他要求非常高速地處理大量數據的場合。 -
Because of the complicated flight state of the aircrafts, there rests a critical demand for high speed operation of flight data in the synthetical graphical display system : we must finish all computations of the flight data and send them into the display panel in a very short time which is critically specified by the display instruments
在機載綜合顯示系統中，由於飛行狀態復雜，對飛行數據的處理和顯示都提出了比較嚴格的時間要求：需要在顯示器的一幀時間內完全計算數據並完成顯示任務。因而在工程中，硬體設計的運算速度成為至關重要的因素之一。 -
Although gpu has a very high computing speed, algorithms implemented in cpu cannot be put to execute in gpu directly because of the discrepancy in instruction execution manner of the two. gpu ' s architecture is a high parallel simd instruction set system. to reimplement algorithms insufficient to run on cpu with programmable graphics hardware, it has to reconsider the data structures and procedures to implement them to make full use of the
雖然gpu具有非常高的計算速度，但並不能將以前在cpu中實現的演算法直接放到gpu中來執行，這是因為gpu的指令執行方式和cpu不一樣， gpu的體系結構是一種高度并行的單指令多數據（ simd ）指令執行體系，所以要在可編程圖形硬體上實現在cpu中效率不高的演算法，就需要重新制定演算法實現的數據結構和步驟，以充分利用gpu并行處理體系結構帶來的性能優勢。 -
The vxibus c - size and i, q channels are employed in this module design, and the sampling rate in each channel reaches 500mhz. the memoty deep of the system is 2mb each channel and cpu is high - speed embedded cpu ( powerpc ). the timing and logic function are fulfilled by fpga. after the disscusion of signal adjusted, the detailed scheme of this module design have been showed. in this design, there is much logic function design, and it is very strict with the hardware language program. so the basic flow of hardware program design and several very important methods of high speed logic function design, which is described by vhdl, are introduced. also, expatiated the inner modules structure of fpga for forepart circuit, the keystone and difficulties of the design. the design of high - speed pcb is another difficuty of realizing high - speed data acquisition system, and it is very important. the timing simulating results of several pivotal modules are depicted. high - speed signal paths are terminated to match the characteristic impedance. the design undergoes integrity analysis and software simulation
在本模塊的設計中，有著大量的邏輯設計，對硬體語言程序的編寫要求比較高，因此，文中介紹了硬體程序設計的基本流程，以及幾種基於vhdl硬體語言設計在高速邏輯設計中非常重要的方法。同時闡述了本模塊設計的前端fpga的內部模塊結構，設計的重點、難點，並給出了重要模塊的時序模擬結果。高速pcb的設計也是目前實現高速數據採集系統的難點和重點，文中詳細的闡明了高速pcb設計中的注意點，以及作者在設計本模塊時的經驗和心得。 -
In the end, a kind of completely opened remote digital access developing platform that faced to the network application is discussed in detail. because some standard data modulation protocols are bundled in it, a whole high - speed modem solution for the digital accessing system can be achieved in a single chip. and then the system has a very high - synthesized performance
本文還詳細探討了一種直接面向網路系統應用、完全開放的遠程數字接入開發平臺，該平臺由於捆綁了一些標準的數據調制協議，可單片實現數字接入部分高速調制解調整體解決方案，具有較高的綜合性能。 -
8097bh can do well in data collecting and dealing with high speed. the cpu is 16 - bit wide, and can operate by bit byte word and double word. there are many i / o function components in 8097bh and make the system designing very convenient
8097bh是一種特別適合於數據採集與處理的微控制器，其cpu為16位，支持位、位元組、字、雙字的操作，片內帶有多種可編程i o功能部件，方便了i o設計工作。 -
The institute of electrical and electronics engineers ( ieee ) has developed the ieee 1394 specifications for very high speed data transfer applications, such as digital movies
電子電機工程師協會（電器和電子工程師協會）已經為最高速數據轉移應用程序，像是數傳電影發展電器和電子工程師協會1394規約。 -
As the application of distributed computing is used much more widely ， distributed database becomes a significant part of information management it avoids a lot of disadvantages of conventional centralized database ， and is applicable to many situations distributed database is a set of data which is the unity logic ， but in fact these data is located on different sites it is of high availability ， easy expansibility ， high concurrency ， high efficiency and etc in distributed system ， data redundancy is a method to improve the speed of query and the availability of system distributed query should shield the lower level details of data redundancy from end users ， distributed transaction should ensure data from disaccord this paper introduces basic conceptions of distributed database firstly ， discusses distributed transaction and concurrent control ， describes the development prototype mysql ’ s characters ， architecture and executive mechanism ， then shows the skeleton model of dpsql and exposes the strategy and algorithm of distributed query and distributed transaction ， at last analyzes the extra expenses and response delay of distributed processes this paper exposes the implementation mechanism of distributed query and distributed transaction emphatically distributed query uses the strategy of “ read one ， write a11 ” s0 in such a system if user ’ s requests are read - - only for the most part and the distribution of data redundancy is plausible ， efficiency is very high distributed transaction uses two - 。 phase commit protocol to ensure the consistency of global data ， which has less communication overhead
分散式查詢需要向用戶屏蔽數據冗餘分散的底層細節，分散式事務處理要保證全局數據完整，這都是傳統集中式數據庫不曾面臨的問題。本文首先介紹了分散式數據庫的概念性問題；接著討論了分散式事務涉及的定義及演算法；然後描述了dpsql的原型mysql的特性、結構和執行機制；繼而給出了dpsql的梗概模型，闡述了實現分散式查詢和分散式事務處理的策略及演算法；最後分析了進行分散式處理給系統增加的額外開銷和客戶端的額外響應延遲。本文重點描述了分散式查詢和分散式事務處理的實現機制，分散式查詢採用」讀一個寫全部」的本地優先策略，在讀操作頻繁的系統中，只要庫的分佈合理，單機效率極高，幾乎無任何附加開銷和延遲，而以整個系統的角度看來，吞吐量就更是優于單機系統；分散式事務處理採用兩階段提交協議，通信次數較少並能確實保證副本一致。
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