access n. 1.接近;會面。 2.捷徑,門路〔指方法、手段〕;檢查孔;進路,入口;【自動化】(存貯器的)存取。 3.(病的)發作;(怒氣等的)爆發。 4.增加。 a man of difficult access 難接近的人,難會見的人。 access and recess (病的)發作和靜止。 an access of anger 發怒,動怒。 an access of fever 發熱。 an access of territory 領土的增加。 access to books 接觸書籍的機會。 be easy [hard, difficult] of access 容易[難]接近的;容易[難]進去的;容易[難]會見的。 gain access to 接近;會見,謁見;接通(計算機)。 give access to 接見;準許出入。 have access to 得接近;得會見;得進入。 within easy access of (London) 容易去到(倫敦)的地方。 access channel “向公眾開放”專欄節目頻道。
access to 接近,進入(某地的)方法; 接近;通向…的入口; 進入,接近; 能接近、進入、了解或使用; 途徑;使用……的機會; 有機會接近; 有權進入,接觸
Three wideband access schemes of wire , wireless and satellite based are defined in different communication conditions on the operating environment 根據現場不同的通信條件確定了有線、無線、衛星三種不同的寬帶接入技術方案。
The design of the access equipments is implemented for the different access schemes . it achieves mainly the functions of collecting , dealing and passing various services 重點針對三種不同的接入方案完成了相應接入設備的配置,其主要完成現場各類業務的采集、處理及上傳功能。
An action group headed by the planning , environment and lands bureau will be set up to identify areas of the city which are badly affected by street level pollution that could benefit from pedestrianisation or restricted access schemes 一個由規劃環境地政局統籌的行動小組將會成立,找出深受路旁空氣污染問題影響的地區,并在這些地區設立行人專用區或限制車輛駛入。
On considering the influence of parameters such as rtsjthreshold , packet error rate , i analyze the performance of csma / ca in basic access scheme as well as rts / cts scheme . by successfully simulated the functions of 802 通過對站點接入概率的分析,本文系統的分析了csma ca基本接入機制和rts cts接入機制的性能,并考慮了rts _ threshold參數、信道誤碼率對性能的影響。
An action group headed by the planning , environment and lands bureau will be set up to identify areas of the city which are badly affected by street level pollution that could benefit from pedestrianisation or restricted access schemes 一個由規劃環境地政局統籌的行動小組將會成立,找出深受路旁空氣污染問題影響的地區,并在這些地區設立行人專用區或限制車輛駛入。
Providing a novel access scheme for solving “ last mile ” wideband access and global person communications . in wireless optical code multiple access ( w - ocdma ) network , media access control ( mac ) is a key issue , which determines network performance 、 bandwidth efficiency 、 complexity and cost of terminal 無線光碼分多址( w - ocdma )接入網中,數據鏈路層的媒質接入控制技術( mac )至關重要,它直接影響網絡的性能、帶寬利用效率、終端設備的復雜度和成本。
With the trend that cdma will be the dominant multi - access scheme in the new generation of wireless communication , how to apply spatial processing in cdma system has been becoming the emphasis of research in smart antenna . a proper method is space - time processing due to the space - time structure of wireless channel . beamforming can be combined with rake to form 2d rake receiver , which can effectively weaken the enhancement of mai in conventional rake receiver . however a more effective method is to use space - time filtering . these two scheme will be discussed and the structure and realization will be presented 碼分多址技術逐漸成為新一代通信系統的主流多址技術,如何在碼分多址系統中引入空域處理以改善系統性能是當前智能天線技術研究的重點之一.考慮到無線信道的時空二維結構特征,一種合理的實現方式是采用時空處理方法,將波束形成技術與時域分集技術相結合;另一種更有效的方法是在接收端采用時空二維聯合處理,對無線信道進行時空二維均衡
Capacity and performance of mobile radio systems essentially depend on the choice of the multiple access scheme . a novel and promising wireless digital modulation / multiple access technique called multicarrier cdma is studied in this thesis , including reducing the peak - to - average ratio , which is one of its key techniques . mc - cdma is combination of ofdm and cdma , thus advantages of both techniques are exploited 移動通信系統的容量和性能在很大程度上取決于多址方案的選擇,本文主要討論了在通信領域新興的擴頻多址方式一多載波cdma ( mc - cdma ) ,并對降低mc - cdma系統峰值平均功率比這一關鍵技術進行了研究。
While some organizations abroad has started research on this area and can surport broad band access scheme and devices , some demestic institution and company just start research and do not have corresponding solution . under this condition , we started our research , including key technologies research of gpon and system framework research of gpon 國外已經開始這方面的研究,并且已有少數公司可以提供基于gpon的寬帶接入方案和設備,而在國內對gpon的研究還剛剛開始,主要集中在一些關鍵技術上,還沒有成熟的解決方案。
In this paper , we study the performance of input - buffered atm switching with window - access scheme and output - grouping architecture . the close - form formulae of maximum switch throughput , mean cell delay and cell loss probability are obtained by probability generating function approach . the accuracy of theoretical analysis is verified by computer simulations and results show that the maximum switching throughput will reach 99 % under random uniform traffic when the window size and the group size are 4 and 16 respectively 本文提出了具有組合的窗口接入和線群輸出結構的輸入緩沖atm交換網絡并對其性能進行了研究.通過概率生成函數方法得到了計算該交換網絡最大吞吐率,平均信元時延和信元丟失率的封閉表達式,并通過計算機模擬實驗驗證了理論分析的精確性.研究結果表明,在隨機均勻業務下,當窗口尺寸和輸出群尺寸分別為4和16時,最大吞吐率可達到99