digital switching system 中文意思是什麼
digital switching system
解釋
數字轉換系統-
Interoffice junction digital line signalling system for telephone automatic switching network
電話自動交換網局間中繼數字型線路信號方式 -
Digital program - controlled telephone switching system project ( 6, 000 lines and trunks ) in linton telecom bureau, shaanxi province
陜西電信臨潼郵電局六千門程式控制交換機開通工程。 -
A digital central office switching system made by lucent. it is typically used as an " tandem switching office, switching long distance phone calls. see 5ess
朗訊公司生產的一種數字市話局交換系統。通常作為一種匯接交換局，轉接長途電話。參見5ess 。 -
Lastly, the hardware circuit of digital acquisition system is designed, and the programs for system controlling and adaptive filter arithmetic are designed. eeg can be observed clearly after d / a switching. at the same time, eeg data is transmitted to the upper machine by serial communication, so we can see eeg waveform by virtual instrumentation
在此基礎上，針對固定濾波器存在的問題，提出了將自適應濾波技術應用於腦電測試中，並進行了理論研究和模擬研究，設計出了能較好地濾除50hz強干擾的自適應陷波濾波器和去基線漂移的自適應濾波器。 -
This paper introduces the switching device, which will be used in an artificial system. it introduces the basic theory of communicating switching and the process of design and, on the base of expirement, we get each testing datum when digital signals pass the switching matrix, which prove digital signals can pass the switching matrix with little distortion
闡述了矩陣交換的基本原理和矩陣交換設備的設計過程，並在實驗的基礎上給出了數字信號通過矩陣開關時的各項實驗數據指標，從而證明了信號通過矩陣體時，失真小、干擾小，能夠較好的滿足實用要求。 -
Digital program - controlled telephone switching system project ( 6, 000 lines and trunks ) pingyao telecom bureau, shanxi province
陜西電信西安小寨局20000門程式控制交換機開通工程。 -
During the design process issues, first of c & c08 digital program - controlled switching system in detail and then single format value indicating the careful analysis, then, the main program of the algorithm and delphi translation process, and the main landing interface and the interface design steps, the final design of the whole process of summing up, on the billing system and the improvement and development prospects
在本課題設計過程中，首先對c & c08數字程式控制交換系統詳細話單格式及取值說明進行了仔細的分析，然後重點介紹了主程序的演算法和delphi編譯過程，以及登陸界面和主界面的設計步驟，最後對整個設計過程做了總結，並對該計費系統的完善和發展進行了展望。 -
Our company had been established in 1997, specializes in building intelligent systems engineering design, construction and terminal equipment ( building automation systems, access control, tv monitoring systems, computer network system, digital voice switching systems, public broadcasting systems, smart card system ) agent sales, installation, commissioning, maintenance
公司成立於1997年，專業致力於建築智能化系統工程設計、施工和終端設備（樓宇自控系統，門禁系統，電視監控系統，計算機網路系統，數字語音交換系統，公共廣播系統，智能一卡通系統等）的代理銷售、安裝、調試、維護。 -
This paper provides an efficient way to analyze those call irregular data detected in toll digital switching system
本文首先應用統計方法，對各種不同因素所造成的異常調用分配進行分析，並根據分析結果設計障礙判斷流程。 -
On the basis of the above, it provides a detailed design of large digital switching units dx1000 based on the implementation of altera fpga. at last, it introduces the applications of dx1000 in the hjd04 switching system
在此基礎上，提出了基於altera的fpga實現的大型數字交換單元dx1000的詳細設計，最後，介紹了dx1000在hjd04交換系統中的應用。 -
The dissertation takes the pmsm ( permanent magnet synchronous motor ) ac servo drive system as research object, according to the requirement of developing high performance pmsm ac servo drive system, and combing the new development of control theories and soft - switching technology. on the basis of analysis and research of theory, a full digital pmsm ac servo drive system based on soft - switching technology is developed, with the dsp ( tms320f2812 ) and cpld ( epf10k10lc84 - 15 ) as the central control unit
本文以極具發展前景的pmsm交流伺服驅動系統為研究對象，在綜合分析現代交流伺服系統發展趨勢和借鑒前人研究成果的基礎上，針對發展高性能pmsm交流伺服驅動系統的需要並結合控制理論和軟開關技術的新發展，在理論研究的基礎上，設計實現了一套完整的基於軟開關技術並應用dsp （ tms320f2812 ）和cpld （ epf10k10lc84 - 15 ）為控制核心的全數字化pmsm交流伺服驅動系統。 -
In the design of real - time control system, the paper takes three - phase full - bridge mosfet inverter as the real - time control main circuit, and adopts a control scheme with 120 ? switching mode combined with half - bridge pulse width modulation ( pwm ), which would avoid straightthrough short of a certain bridge. phase current is detected by single current sensor ; three - phase position signals generated by position sensors could not only supply commutation information for inverter, but also be used for speed detecting based on signals " period measurement, which makes the speed sensor unnecessary. the whole control system adopts speed and current dual closed - loop control strategy in order to construct a high performance rare - earth permanent magnetic brushless dc motor ( repm bldcm ) full - digital real - time control system
在實時控制系統的設計中，本文以三相全橋mosfet逆變電路作為實時控制主電路，採用120導通方式結合半橋pwm調制的控制方案，從而有效地避免了橋臂的直通短路；本文用單電流傳感器實現對相電流的檢測，來自位置傳感器的三相位置信號不僅為逆變電路提供換相信息，而且也用於基於信號周期測量的轉速檢測，這樣就省去了速度傳感器；系統採用的是速度、電流雙閉環控制策略，力求構建高性能的稀土永磁無刷直流電動機全數字實時控制系統。 -
A noval optics measurement device, the master control computer in the photoelectric theodolite, has become the commanding and controlling center system, which can complete data communication with many transducers internally and externally do with the guidance equipment, such as the center computer. and it needs to real - time complete data acquisition, data fusion, digital guidance, state switching, state controlling and function testing, all of which can be completed for the dominance of the real - time multitasking windows nt operation system
隨著武器裝備的不斷發展，對靶場測量設備也提出了更高的要求，新型光學測量設備?光電經緯儀的主控計算機系統已成為指揮控制的中心系統，它對內與若干傳感器進行數據通訊，對外與中心計算機等引導設備進行數據通訊，它實時進行著數據採集、數據融合、數字引導、狀態切換、狀態控制和功能檢測。 -
900 1800mhz tdma digital cellular mobile telecommunication network technical specification for general packet radio service switching sub - system equipment
900 1800mhz tdma數字蜂窩移動通信網通用分組無線業務gprs設備技術規范：交換子系統 -
Then, it introduce several cryptographic protocol based on elliptical curve, including diffie - hellman key switching, elgamal encryption and decryption, elgamal digital signature, ecdsa, etc. based on these, the author analyze kinds of security threat faced to 3g system and discuss the security rule and security objectives
然後介紹了基於橢圓曲線的幾種密碼協議，包括diffie ? hellman密鑰交換， elgamal加解密， elgamal數字簽名， ecdsa等協議。在此基礎之上，分析了3g系統面臨的各種安全威脅並對系統的安全原則和安全目標進行了討論。
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