環信系統 的英文怎麼說
中文拼音 [huánxìnxìtǒng]
環信系統
英文
infoterra-
Electronic counterwork is an important task of mt systems. the adaptability to sophisticated environment of communication devices, is the survival standard of mts
電子對抗是軍事通信的重要課題，通信設備對復雜工作環境的適應和抗干擾能力，是軍事通信系統的生存的標準。( c ) propose the scheme to implementing the coder and deoder of optical time - spreading / frequency - hopping, by assigning two orthogonal codes for one user and using these two codes to encoding 1 and 0 respectively, differential detection can be adopted. not only improves system performances in ber, but also resists the interference such as mai, and does n ' t need any control devices to evaluate the optimum decisive threshold
通過給每個用戶指定互相關為0的兩個地址碼分別發送1和0信號以及在接收端採用差分檢測技術，避免了ook （開關鍵控）光通信系統中0不發送光脈沖和ook常規檢測方式下最佳判決門限必須根椐用戶數等外界環境而改變，從而提高了系統性能和降低了系統的復雜度。The advent of the internet and the wide availability ofcomputers, scanners and printers make digital data acquisition, exchange and transmission a simple task. however, making digital data accessible to others through networks also creates opportunities for malicious parties to make salable copies of copyrighted content without permission of the content owner. digital watermarking is likely to be a potential solution to this problem. digital watermarking has been proposed as a solution to the problem of copyright protection of multimedia documents in networked environments. it makes possible to embed a watermark ( such as identification data, serials number, text or image etc. ) to multimedia documents allowing copyright protection, secret communication, document authentication and so on. in this paper, we present a new digital image watermarking method based on svd ( singular value decomposition ), and then give some theoretical analysis about the algorithm. extensive experimental results show that this method is much more robust than other methods presented before
隨著計算機和網路技術的飛速發展，數字圖像、音頻和視頻產品愈來愈需要一種有效的版權保護方法，另外通信系統在網路環境下的信息安全問題也日益顯露出來.數字圖像水印技術為上述問題提供了一個潛在的解決方案.所謂水印技術就是將數字、序列號、文字、圖像標志等版權信息嵌入到多媒體數據中，以起到版權保護、秘密通信、數據文件的真偽鑒別和產品標志等作用.本文提出了一種新的基於奇異值分解的數字水印演算法並且對該方法的理論基礎給出分析.實驗結果表明這種方法要比目前提出的流行演算法魯棒Design of impendence match for high frequency power amplifier of mine mobil communication system
礦井移動通信系統高頻功放環節的阻抗匹配設計The environment system where fuzzy comprehensive evaluation model and reasoning method, neural networks comprehensive evaluation model, interrelated data and information, knowledge and experience of evaluation expert group, computer and all kinds of advanced technique are integrated is studied in detail
深入研究了將模糊綜合評價模型與推理方法和神經網路綜合評價模型、各類有關的數據和信息、評價專家群體的知識和經驗、計算機及各種先進技術綜合集成的環境系統。By simulate running, this greenhouse has these advantages : the circuit is simple ; the degree of intelligent of the greenhouse is in a high level, and the control ability is reliable, which can control the environmental factor in the greenhouse within a certain range. ability of anti - interference of corresponding system is high, and hot plug can be realized, which made systematic expansion easy
經過模擬運行，該溫室具有這樣的優點：電路結構簡單；溫室的智能化程度高，控制能力可靠，它可以將溫室中的環境因子控制在一定的范圍之內；整個溫室的通信系統抗干擾能力強，而且可以實現各個通信模塊的熱拔插，非常便於系統的擴展。The super entropy produce criterion is a good tool to judge the system ' s abrupt change from a lower grade to a higher one. in this paper the entropy of the urban resource - environment system was defined, and in an example of its application the super entropy produce criterion of the urban resource - environment system reflected the real developmental process of the whole system. furthermore, in this paper, a new model for the grid size optimization of the finite element method ( applied to the water quality modeling of the topographically complicated river ) was brought forward based on the maximum information entropy theory in condition that the length of gird was given
超熵產生判據為我們提供了判斷系統從低級有序向高級有序突變過程的工具，本文提出了城市資源與環境系統熵的定義，在實例中的應用證明城市資源與環境系統的超熵產生判據較好地反映了整個系統的演化情況；另外，本文針對在城市復雜河道情況下，利用有限單元法求解河流水質模型時網格單元大小難確定的問題，引入網格信息熵的概念，提出了有限單元法求解河流水質模型的網格優化方法。The future wireless mobile communication systems are expected to provide ubiquitous, high - quality, and high - rate mobile multimedia transmission. however, hostile multipath fading radio conditions give rise to serious inter - symbol interference ( isi ) ; even worse, wireless channel are often time varying, which makes the system more vulnerable and more difficult to track the channel state. orthogonal frequency dvision multiplexing ( ofdm ), which is inherently resistant against isi, has invoked a popular research interest in recent years, and has been a promising candidate technology of the physical layer for future weideband high - date - rate wireless communications. notwithstanding, ofdm is much more vulnerable to errors of both time and frequency synchronization and to that of channel estimation, and how to obtain correct timing and channel estimation efficiently is highly critical to ofdm systems. the dissertation will focus on both of the aspects of ofdm systems mentioned above
但是無線環境的多徑特性造成通信系統中嚴重的符號間干擾，同時無線通道的時變性使得通道特性跟蹤復雜。而正交頻分復用技術（ orthogonalfrequencydivisionmultiplexing ， ofdm ）正是一種解決符號間干擾的有效傳輸手段，因此ofdm技術作為未來寬帶高速率無線通信的物理層候選技術在當前引起了一股研究熱潮。但ofdm系統對定時同步誤差和通道估計誤差非常敏感，如何在ofdm系統中準確快速地實現符號同步和通道估計是至關重要的，本論文將重點針對這兩個問題進行討論。Carrier frequency estimation is a significant problem in wireless communication
載波同步是無線通信系統中的關鍵環節。It is a novel short - distance wireless communication technique, in which data are transferred using non - sinusoidal pulses with very short duration, so it is fit for using in indoor environments which is a typical multipath environment. and it can be coexisted with the existing wireless communication systems at the same frequency band
超寬帶通信系統利用納秒至皮秒級的非正弦波窄脈沖傳輸數據，非常適合作為城區及室內密集多徑環境下的應用，並且能夠與現有的傳統窄帶系統共存。Is the ideal environment for conformance testing of communicating systems
是用於通信系統順從性測試的理想環境。We extend the synchronization algorithms for ofdm systems to mimo - ofdm systems, and introduce a synchronization algorithm for mimo - ofdm systems based on cyclostationarity
將單收發天線下ofdm系統的同步演算法推廣到多輸入多輸出（ mimo ）情況。提出一種基於循環平穩性的mimo - ofdm通信系統同步演算法。Based on such reasons, in this dissertation, some research on mimo radio channel modeling was done, and we proposed a stochastic mimo channel model which could serve as a generalized mimo radio channel model in mimo technology research
基於上述原因，本文研究了現有應用環境下mimo無線通信系統的通道建模理論與方法，綜合了一個寬帶統計mimo無線通道模型，可以作為研究mimo無線通信系統的一個通用空時通道模型。Then we uses the scheme that has the variable gain based on the kalman filtering model realize two steps phase - locks ring circuit track technology, this kind has the advantage that when changed the gain the digital phase - lock link to be allowed simultaneously to realize the fast capture and the reliable track, the simulation analyzes its capture performance
模擬結果表明，自編碼直擴通信系統的編碼捕獲性能具有可行性。採用基於卡爾曼濾波模型實現具有可變增益的二階鎖相環路的跟蹤技術，這種具有時變增益的數字鎖相環可以同時實現快速捕獲和可靠跟蹤，其捕獲性能要比傳統數字鎖相環改善很多。This paper introduce the research significance and critical technology about the laser communication between plane and satellite, summarizes the development on such technology domestic and aboard, studies on the theory which exterior environment and atmosphere have an effect on laser according to research needs, meanwhile, according to various parameters of laser communicate process, simulated researches the integral process
本文介紹了飛機與衛星之間激光通信的研究意義和關鍵技術，總結了國內外在該項技術上的進展情況，對通信過程中激光所受到的大氣以及其它外界環境的影響進行理論上的探討並建立數學模型，根據通信系統的需要建立局部計算機模擬模型，深入分析各種外在因素對激光通信系統的影響。並根據激光通信系統的相應參數，對整體的通信過程進行模擬研究。The research indicates that the model is effective and believable, which could represent the realistic environmental system of a mining area
研究表明，所建立的模型是有效的和可信的，能夠充分代表現實的礦區環境系統。First of all, the characteristics of different adaptive algorithms and equalizers are theoretically researched. then digital microwave communication system model is build by simulink. based on this model, the convergent behavior and bit error rate performance of three equalizers ( nlms, kalman and rls ) are compared in multi - path fading channel
為了達到這個目的，首先需要從理論上對各種自適應均衡演算法以及自適應均衡器的特性進行深入研究;然後利用simulink建立接近實際環境的數字微波通信系統，在多徑衰減通道環境下比較了三種基帶均衡器（ nlms ， kalman和rls ）的收斂特性以及系統誤碼特性，並比較了nlms基帶均衡器和通帶均衡器的性能。The study on founding the law environment for the personal credit investigation system in china
關于構建我國個人聯合徵信系統法律環境的思考In the paper, firstly, we studied the theory and key technologies of virtual operation environment, proposed the scheme to achieve ha and self - management and analyzed research aim of system, i. e. the system can dynamically manage resource, self healing, self optimizing according to the business requirements and load information, and self protecting
本文首先對虛擬操作環境系統的理論基礎進行研究，提出了採用分區和集群技術相結合解決系統的高可用性，採用策略管理技術實現系統自律性的技術方案；並確立了系統的研發目標，即系統能實行資源的動態配置、故障的自動恢復、根據業務要求或負載信息進行自我性能優化以及自我保護等功能。The paper study correlative technologies of logistics information subsystem microcomputer interlock subsystem and trunking scheduling communication subsystem and design and realize data communication based on trunking technology and bring forward the schemes of how to integrate each subsystems to construct a integrate d automatic job system and focus attention on integrated schemes of date flow closed loop system of each subsystem. the first chapter of this paper gives a brief introduction of industry - mine enterprise steel transportation scheduling job system ' s current status and requirement and correlative components of automatization. the second chapter mainly analyse the components and characteristics of information system in integrated environment
本文第一章對工礦企業鐵路運輸調度作業系統的現狀、自動化的需求和相關構成進行了說明；第二章主要就作業系統綜合自動化環境中的信息系統的構成及其特點進行了分析；第三章對信號微機聯鎖系統中的有關進路控制過程和綜合作業自動化環境中的進路生成與開放作了較詳細的闡述；第四章分析了集群通信系統的技術特點、工作原理及在鐵路運輸調度中的應用；第五章提出了基於集群通信技術數據傳輸系統設計方案；第六章探討了基於車輛實時跟蹤的綜合自動化作業系統各子系統的集成方案。分享友人