選址通信系統 的英文怎麼說

中文拼音 [xuǎnzhǐtōngxìnxìtǒng]
選址通信系統 英文
addressing communication system
  • 選 : Ⅰ動詞1. （挑選） select; choose; pick 2. （選舉） elect Ⅱ名詞（挑選出來編在一起的作品） selections; anthology
  • 址 : 名詞（建築物的位置; 地基） location; site; ground; foundation
  • 通 : 通量詞（用於動作）
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 統 : Ⅰ名詞1 （事物間連續的關系） interconnected system 2 （衣服等的筒狀部分） any tube shaped part of ...
  • 選址 : location and allocation model
  • 通信 : communication; communicate by letter; correspond
  • 系統 : 1. （按一定關系組成的同類事物） system 2. （有條理的;有系統的） systematic
  1. On the base of researching the theory of the scheme and analyzing the signal feature, it is obtained that the existence manners and character of distance information in the differential frequency signal. at the same time, a new conclusion is gained that the technology of frequency agility can decrease the constant error of system. it is also to say that frequency agility and frequency modulation fixed - distance fuze has the similar feature to random period frequency modulation fixed - distance fuze. according to the theory of address coding in the hopping - frequency communication, the paper presents the principle of selecting the frequency agility sequence which fit to the radio fuze and constructs the frequency agility sequence family based on the rs codes

    在深入研究方案原理和分析信號特徵的基礎上，獲得了該體制引信差頻信號中，距離信息的存在形式和特點，得出了頻率捷變技術的引入降低了系統定距固定誤差這一新的結論，即頻率捷變調頻定距引信在定距性能上具有類似隨機周期調頻定距的特徵。本文引入跳頻通信地址編碼理論，結合無線電引信的具體特徵，提出了適用於無線電引信的頻率捷變序列的選擇原則，並構造了基於rs碼的寬間隔頻率捷變序列族。
  2. General specification for land mobile communication system equipment using multi - channel access techniques without a central controller

    無中心多通道選址移動通信系統設備通用規范
  3. To counter the tendency of the development of the marketization, specialization, information - orientation, and modernization of highway transportation, this paper systematically and comprehensively addresses the problems of city main - hub planning, and particularly the problems of hub planning, passenger traffic, freight traffic, and traffic information planning, etc. the main aspects can be seen as the following : 1. on the basis of forecast of the four indexes, through the modeling of traffic hinge station " s address - choice, according to the synthetical analysis of the distribution of economy, industry and population, city planning and traffic structure, etc in chengdu, the planning of the main - hub of chengdu is established and the module function and the structure of the highway hub systems are analyzed

    本論文主要針對現代公路運輸市場化、專業化、信息化、現代化的發展趨勢，結合主樞紐城市運輸規劃中的相關問題進行分析研究，特別是對公路運輸規劃中的主樞紐規劃、客運規劃、貨運規劃、運輸信息規劃等公路運輸所涉及的關鍵問題進行系統、全面、深入的分析研究，主要工作有以下幾個方面； 1 、在對公路運輸四大指標預測的基礎上，通過對公路樞紐場站布局選址模型的建立，根據成都市經濟布局、產業布局、緘市規劃、人口分布，路網結構等相關因素的綜合分析，確定了成都市主樞紐規劃，並分析了公路主樞紐系統的模塊功能和結構組成。
  4. Land mobile communication system requirements using multi - channel accss techniques without a central controller

    無中心多通道選址移動通信系統體制
  5. Facing the information age, the marine environmental information systems should also absorb the article intelligence technology and virtual reality technology to serve as a decision - making support system and export system for the ocean environment study and development. thirdly, based on maplnfo ( gis software ) platform and development languages ( vb and mapbasic ), marine environment information system in luoyuan bay was designed and development, then relied on gps and rs, ocean environment information in luoyuan bay was collected and managed effetely, its aim is to provide a reasonable opinion for decision - maker on how to utilize resources and protect environment in luoyuan bay. lastly, marine environmental quality of aquafanns in luoyuan bay was assessed relied on marine environmental information system and mathematics model ( fuzzy cluster ), and corresponding countermeasures were presented to protect ocean environment in

    本文首先通過對海洋環境信息系統的特點和國內外研究現狀的分析，探討了網路時代海洋環境信息系統的發展趨勢；接著以mapinfo （ gis軟體）為開發平臺，以vb和mapbasic為開發語言，面向管理和決策層，進行羅源灣海洋環境信息系統的設計與開發，並結合遙感（ rs ）和全球定位系統（ gps ）建立模型庫，收集和管理羅源灣海洋環境信息，旨在為羅源灣的海洋建設項目的立項、選址、規劃和海洋污染事故的應急提供決策支持，從而有效地保護羅源灣海洋生態環境；最後運用羅源灣海洋環境信息系統並結合數學模型（模糊聚類）對羅源灣養殖區水環境現狀進行評價，從而使得羅源灣各海水養殖區的水質現狀評價變得生動、形象和直觀，並針對羅源灣海洋污染源狀況和污染現狀，提出了保護羅源灣海洋生態環境相應的對策。
  6. In this thesis, first, we present the theory of sess system, the generation of the sess spreading code and its characteristics and the acquisition theory of conventional spread spectrum communication system. an efficient acquisition scheme based on periodically transmitting the synchronization head, which is composed of binary chaotic codes, using the matched filter and automatic decision threshold - level control based on a so - called constant false alarm criterion for sess system is present. the acquisition model of sess system is built and simulated in the awgn channel, the raleigh fading channel and imulti - address interfere condition

    本文首先概述了自編碼擴頻通信的原理、自編碼擴頻序列的產生方法及其特性和擴頻通信系統編碼同步的理論，然後針對自編碼擴頻通信系統提出了擴頻序列捕獲方案:周期性地加入混沌序列同步碼，並採用恆虛警率匹配濾波器捕獲法;在加性白高斯噪聲通道、瑞利衰落通道和多址干擾情況下進行了模擬，分析了各種捕獲性能:在選擇性能最優的混沌序列、適當的序列長度、虛警概率及門限值的情況下，可以獲得較短的捕獲時間和較大的捕獲概率。
  7. Yin - shang dynasty carried out the principle for choice of defense system by putting the city in the center and constructed the defense protective screen around the city through setting up many layers of defense installations ; and set up several circles of important military towns on the periphery ranges, where set up military pre - alarm and information transmitting systems fitted with main - way nets and post systems extending to all directions, so as to form the state military defense systems

    摘要殷商國家施行「都城居中」的選址原則，通過建造都城的多重防禦設施，構建都城周邊的軍事防禦屏障，並在周邊地區分設若干軍事重鎮環帶，建立周邊地區的軍事預警和信息傳遞系統，配之以四通八達的幹道網和驛站制度，從而形成國家軍事防禦體系。
  8. This dissertation, firstly, on the base of background materials of changjiang logistic co., ltd, analyze deeply the all - round processes of logistics operation, and open out the existing problems of changjiang logistic co., ltd at present, which mainly includes information communication barriers and information cannot be used of during the logistics businesses, resulting in increasing of the logistics operation cost and influencing speed of logistics business response to the market, according to analysis of existing problems and targets, offer solving problems total project, designing function modules and the framework of logistics management information system from two factors about reducing cost and increasing response speed, and puts forward mathematics module in terms of practical logistics operation case

    本文首先以武漢長江物流股份有限公司各方面背景資料為基礎，對物流作業流程進行全面而深入的剖析，揭示了長江物流公司目前存在的問題，主要表現為信息溝通不及時、物流作業得不到信息有效支持，影響了總物流成本降低，及物流服務響應速度。其次，依據問題分析和系統目標，提出了擬解決實際問題系統構架，詳細設計了物流管理信息系統結構和各個功能模塊，著重從降低物流營運成本和提高物流響應速度兩個出發點來進行論述。本文還根據數學h圈圖論理論，結合實際物流運作案例，就倉庫選址優化和配送線路優化進行了探討。
  9. Cdma has become the main technology of the third generation mobiletelecommunication. many users in cdma system are distinguished by differentspread sequences and have the same time chip and frequency unlike in theconventional tdma system or fdma system. but the practical spread sequences cannot reach the ideal condition, the correlation function equals zero, so that it will causethe multiple access interference ( mai ) when lots of people are communicating. multi - user detection ( mud ) makes joint detection on the received signals by makingfull use of the information of all users ’, which relaxes mai and increases the capacityof system

    Cdma技術已經成為第三代移動通信系統中的主流技術，它與傳統的fdma 、 tdma不同，在cdma系統中多個用戶均佔用同一時隙、同一頻隙，所不同的是選取的地址碼不同，而實際選用的地址碼間的互相關函數又不可能全部達到理想狀態的全為零，因而造成了多個用戶同時通信時，必然要產生多址干擾。
  10. For power control of listening users, forward power control method are introduced based on full, multichannel, filtered report, and collision method etc. the full report method has redundancy report information, and its real - time performance is bad, multichannel report is introduced to improve the real - time performance, and filtered report is introduced to eliminate the redundancy information, finally the collision method introduced can not only get higher real - time performance but also diminish the redundancy information ; 2. in order to meet the requirements of making the dynamic simulation of trunking group system, the ms ’ s random move equation is brought forward, the simulation of ms ’ s distribution is done and the integrated channel model are presented ; 3. the smart predicative model of power control is introduced to overcome the delay and track the change of the complicated network, with this model, the power control ‘ s performance is greatly improved

    全匯報方法存在冗餘的匯報信息，而且實時性較差，為了改善實時性提出了多通道的匯報方式，為了改善冗餘匯報而提出了篩選法，最後介紹的碰撞法在減少冗餘信息的同時又提高了實時性;二、為了集群功率控制動態模擬的需要，提出了移動臺的隨機運動方程，進行了有關移動臺的分佈模擬，建立了綜合的通道模型;三、希望克服延時和跟蹤復雜網路環境變化，提出了功率控制的智能預測模型，通過智能預測模型可以改善功率控制的性能，著重介紹了採用神經網路的方法實現智能預測的通用模型，從而跟蹤復雜多變的無線環境，諸如慢衰落及快衰落（包括多徑衰落、多普勒效應所引起的衰落）等網路特徵，達到預測功率需求;四、採用二級正交碼和智能天線（空分多址）的方法進行組內用戶的識別，改進功率控制效果;五、話權用戶的前向和反向功率控制方法;六、對引入gota的cdma系統提出了復合容量表示方法，並作容量分析，探討有關gota系統的qos問題。
  11. 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 ） ，並對降低mc - cdma系統峰值平均功率比這一關鍵技術進行了研究。
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