接通概率 的英文怎麼說

中文拼音 [jiētōnggàilǜ]
接通概率 英文
probability of successful service completion
  • 接 : Ⅰ動詞1 （靠近;接觸） come into contact with; come close to 2 （連接; 使連接） connect; join; put ...
  • 通 : 通量詞（用於動作）
  • 概 : Ⅰ名詞1 （大略） general outline 2 （神氣） manner of carrying and conducting oneself; deportment ...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 接通 : 1 （撥通電話） put through; connect; get through 2 （連通） [電學] close; close up; cut in; （key...
  • 概率 : [數學] probability; chance概率論 probability theory; theory of chances; 概率曲線 probability curv...
  1. And then facing the problem of the channel estimation of the adaptive modulation system, we conclude out the channel estimation algorithms on maximum likelihood ( ml ) estimation and maximum a posteriori ( map ) estimation under the condition of flat fading channel and selective fading channel in detail. to meet flat fading channel, we simulate the relationship of the ratio between the error covariance in map estimation and ml estimation and pilot symbol message length. the conclusion can be drawn from these results

    接著，對自適應調制系統中的通道估計問題難點，詳細推導了平衰落通道條件下和選擇性衰落通道條件下最大似然（ ml ）估計和最大后驗概率（ map ）估計演算法，針對平衰落通道，我們模擬了map估計和ml估計的方差與導頻符號長度的關系，模擬結果表明，錯誤方差受多譜勒頻率的變化影響最大，並且對實際的自適應調制系統，導頻符號長度的取值超過20個符號長度時， map通道估計明顯優于ml通道估計。
  2. A qos - support protocol, m - dcf, and its schedule model are proposed. by providing different contention window for different classes, the higher class frames the higher access probability. the simulation proves that m - dcf has better performance than dcf protocol on system throughput, discard ratio, frame discard ratio of higher classes, average access delay of different classes

    提出了為不同等級幀提供不同競爭窗口的改進型dcf ： m - dcf協議，並給出了m - dcf的調度模型，通過採用不同的競爭窗口，為不同n西安電子科技大學博士學位論文:無線局域網和ip服務質量關鍵技術的研究的應用提供了不同的接入概率，保證了qos ;模擬結果證明了m一dcf在系統吞吐率、丟包率、高等級業務丟包率、不同等級業務的平均接入時延等方面都優于dcf協議。
  3. The channelized digital receiver based on srd is the electronic equipment, which can be used in communication and military affairs, because of its excellence on wide band frequency coverage, digital processing, software programming, high dynamic range, receiving signal with all probability, simultaneous signal detection and so on

    基於軟體無線電思想的通道化數字接收機是一種即可用在通信領域也可用在軍事領域的電子設備，具有大帶寬、數字化、軟體化、大動態范圍、全概率接收、多信號同時處理等優點。
  4. Compared with the blocking of new calls, the users are more dissatisfied with the existing call interrupt. so the handoff calls should have higher priority, which is ensured by assigning the guard channels in the hcs. however, the introduction of guard channels will have quite different effects on blocking probability and handoff failure probability

    與新呼叫阻塞相比，用戶更不能容忍對已有呼叫的中斷，因此可通過在第vi頁西南交通大學博士研究生學瞅文hcs中設置保護通道來保證切換用戶更高的接入優先權，但保護通道的引入會對呼叫阻塞概率和切換失敗概率產生截然不同的影響。
  5. Taking load uncertainties, infeasibility problem and multiple objection of the reactive power optimization in the radial distribution system into consideration, loads are modeled as fuzzy interval numbers. fuzzy power flow is proposed based on fuzzy interval load for the more practical membership function of line losses rate and maximal voltages offset. this thesis presents multiple objection model of the reactive power optimization considering uncertainties using the fuzzy set theory

    對配電網電壓無功優化問題中負荷的非概率性的不確定性問題、多目標問題、約束不可行性問題進行了研究，用模糊區間來描述實際的負荷情況，並用負荷的模糊區間值計算配電網的潮流，得到有功功率損耗和電壓的模糊區間值，使網損率和節點電壓最大偏移量的隸屬函數更接近實際情況；將改進遺傳演算法與模糊集理論相結合，通過求解多目標函數和約束條件的模糊集合的交集，得出網損率和節點電壓最大偏移量最小的最優運行狀態。
  6. It contributes to the deeper comprehesion of these probability distributions, affords more detailed theoretical basis for further studying and simulating satellite mobile channels, ? theoretical analyses and discussions of the models which are often used in the study of the propagating characteristics of satallite mobile channels are given ; meantime, some discussions on the work of model simulations are also given, ? incorrect derivation of the equality between c. loo model and corazza model in some other papers is pointed out. via the conception of received power, we derivate that in the rural environments these two models really have the equal relationship by the way of theoretical derivation and simulatant fittings. therefore, it is able to use corazza model in studying the characteristics of satellite mobile channels in the rural environments and able to avoid the iterant work of modeling, in order to enhance the efficiency and accuracy of research work, ? detailed processes of simulating lutz model by using matlab6. 0 _ simulink4. 0 and the results of comparisions are given

    本文包含有以下的主要內容： ?對衛星移動通信通道傳播特性研究中常用的三個概率分佈給出了詳細的推導過程；以便對這幾個在衛星移動通信通道傳播特性的研究中常用的概率分佈函數有更深的理解，對進一步研究衛星移動通信通道傳播特性和對通道的建模提供了更為詳盡的理論基礎； ?對衛星移動通信通道傳播特性的研究中常用的通道模型進行了理論上的分析和討論，並對衛星移動通信通道建模的研究工作提出了一定的看法； ?指出了以前的文獻中關于c . loo模型和corazza模型的等同性的證明錯誤；並從接收信號功率的角度出發，通過理論推導及模擬曲線擬合重新證明了在鄉村環境下，這兩個模型的確是具有等同性的；從而在對鄉村環境下的衛星移動通信通道傳播特性進行研究時，可以只採用corazza模型來對實際的通道進行建模，這樣可以避免重復的建模工作並提高研究工作的效率和準確性； ?給出了lutz模型在matlab6 . 0 _ simulink4 . 0環境下的軟體模擬實現的詳細過程和整體模擬測試的對比結果，保證了該模型在硬體實現時的可靠性和可行性，從而可以將它們應用於指導模型的硬體模擬實現並可以降低硬體實現時的風險。
  7. Firstly, for the errors of text ’ character and word, utilizing neighborship of character or word, check character and word errors by character string co - occurrence probability. secondly, for the errors of syntax of text, according to statistic and analysis of a large - scale contemporary chinese corpus, recognize the predicate focus word and the others sentence ingredient, check the syntax errors. thirdly, for the errors of text ’ semanteme, establishing semantic dependency relationship tree based on hownet knowledge, presents a method that based on semantic dependency relationship analysis to compute sentence similarity, check the semantic errors

    對于文本字詞錯誤的檢查，本文主要利用了字詞二元接續關系，根據同現概率檢查文本字詞錯誤;對于文本語法錯誤的檢查，本文利用教研室已有的一個大規模語料庫，通過對語料庫進行統計分析，獲得語法查錯所需要的語言規律和知識，利用謂語中心詞識別和其他句子成分識別的方法，檢查文本語法結構上的錯誤;對于文本語義錯誤的檢查，本文主要利用知網知識得到語義依存樹，通過對句子的有效搭配對的相似度計算檢查語義錯誤。
  8. As a new communication mode, the spread spectrum communications are widely used in military communication, distance finding and precise position, because of its well multiaddress access, lowly capture probability, the excellent performance of anti - interference and secrecy

    擴頻通信作為新型的通信方式，以其優良的多址接入、低截獲概率特性、抗干擾特性和強保密性被廣泛應用於軍事通信、測距與精確定位。
  9. The study lies in following aspects : 1 ) a great number of experiments on sfrc are carried out to obtain the basic data of sfrc energy properties, which are the fundamental parts of further study. 2 ) a probability analysis based on statistical theory is done to all the experiment data. in the end, energy criterion for sfrc associated with security criterion are calculated and listed for future use

    本文主要針對鋼纖維噴射混凝土在單層隧道襯砌中的應用進行了研究，內容包括以下幾個方面： 1 ）進行了大量的鋼纖維混凝土標準試件試驗，試驗的成果和數據為研究鋼纖維混凝土的能量特徵提供了事實依據和參考； 2 ）運用概率統計方法對鋼纖維混凝土的指標進行了可靠性分析，得出了實際可以接受的保證率下的鋼纖維混凝土能量指標； 3 ）通過合理的假設和簡化，研究了鋼纖維混凝土構件在破壞過程中的能量耗散機理。
  10. This paper presents the conversion from dynamic logic gate to markov chain, the solution of dynamic subtree top event failure probability and the method of obtaining the failure mode of subsystem using markov model, that is sequence cutsets of the dynamic subtree. the typical approach to importance analysis of component is impractical for large systems in markov model, so this paper also provides a simple and intuitionistic graph solution based on markov chain

    論文研究了動態邏輯門向馬爾可夫鏈的轉化方法，利用馬爾可夫鏈法求解動態子樹頂事件概率，以及通過馬爾可夫狀態轉移圖直接找齣子系統的故障模式和薄弱環節，即得到動態子樹的順序割集。
  11. It can be used in any complex environment, can locate all paths from transmitter to receiver which avoid redundant calculation, and it is a standard 3 - d forecast model ; in addition, it is a point to point ray tracing method based on specular theory which do n ' t carry out the receive test ; furthermore the model adopt the reverse arithmetic which exert the tree concept in data frame and establish a virtual fountain tree permanently, the proagmme can back - search the virtual fountain tree when it is running. these operation increase the calculate speed and it result in the higher receive efficiency and precision. the thesis design a programme to compare the prediction results based on ray tracing method of virtual fountain tree between the measurement results and prediction results based on the other transmittion models. the comparsion result indicate the new model is a better model

    它可應用於任何復雜的傳播環境中，能找到發射機到接收機之間的所有電波傳播路徑而無須冗餘的計算，是一種準三維的預測模型；另外，從本質上講，它仍然是一種基於鏡像理論的點對點的射線跟蹤法，所以它無須進行接收測試；而且由於採用了反向演算法，運用數據結構中多叉樹的概念，先確定需要計算的場點位置，找出所有能從源點到達場點的射線，並且可一次性建立一個虛擬源樹，以後每次的計算只要通過對該樹進行後序遍歷即可，大大提高了運算速度，因而有較高的接收效率與精度。本文對該模型進行了相應的模擬，並將其預測結果與實測結果以及基於cost231經驗性模型和基於強力射線跟蹤確定性模型的預測結果進行了比較，結果表明了該模型的優越性。
  12. Secondllv in the 1 d random traffic flow model. the relation function between the correlation and the creation. disappearance. brake probabilities of the vehicles is presented. according to the statistical mechanical approach to the spatial correlation functions. the theoretical results agree with that of the computer simulation. thirdh. based on the bml model. a main - road traffic flow model with two speeds on two dimensions is designed. this model simulate the traffic situation of one main road and several branches in the cit traffic lights placed on the crossing. vehicles breaking ~ vhile running and turning to other direction while jamming. we investigate the ~ ' e1ocitv and flo ~ ~ of the model when the initial densitvthe brake and turning probabilities. the green to signal rati3. thc number of the branches and the period of the signal are changed. then the reasons causing all the kinds of phenomena are analvzed. finallv. we simulate the bml model using the method of lattice boltzmann which ~ vas brought out by liu mu - renand obtain the velocity - density graph similar to the previous result. the upper critical densiw above which there are oniv jamming configurations. and the lo ~ ver critical density below which there are only moving configurations are the same as before. the boltzmann function which is on the lattices shows the moving and jaxmning transition obviouslv. thus it proves the possibilit of this method on the traffic research

    接著，建立了和研究了二維二速的主幹道模型，該模型模擬了城市交通中一條主幹道，多條支道的交通情況，在幹道與支道的交叉路口設置紅綠燈，車輛在運行中可以有對突發事件發生反應的剎車，在發生堵塞時，路口的車輛可考慮通過轉向來緩解交通等各種實際情況的發生，給出了車輛演化的演化方程，並通過計算機模擬，研究模型在改變車輛的初始密度、剎車概率、轉向概率、支道數、紅綠燈信號的綠信比、紅綠燈信號周期等各種情況下支、主幹道車輛的速度、流量的變化，並分析在各種情況下交通狀況的成因，提出改善交通的有效措施。最後，在劉慕仁提出的用格子boltzmann方法研究一維決定論交通流的思路下，將此法推廣到對二維bml模型的模擬上，得到了與用以往方法的研究結果相類似的速度-密度圖線，且車輛從運動相到堵塞相轉變的上下臨界密度是一致的，同時分別給出車輛在處于暢通相和堵塞相時， boltzmann函數在格子上的分佈情況，進一步驗證了此法的可行性。
  13. Digital channelized receiver is good at real - time signal processing, especially at improving ability of whole probability capturing as well as resolving the problem of channels ’ in - equilibrium of analog channelized receiver

    數字通道化接收機可以提高實時處理能力，特別是提高全概率截獲能力，並且可以有效地解決模擬通道化接收產生的通道不均衡的問題。
  14. In modern communication, direct sequence spread spectrum communications was widely used in the fields of telemetering and telecontrol systems, because of low interception probability, its high noise resistance and good security

    在現代通信中，直接序列擴頻通信技術以其截獲概率低、抗干擾性強、保密性高等優點，在航天測控領域得到了廣泛的應用。
  15. The research paper is based on the the latest softwares of the managing inventory, its research subject is about simulating the most appropriate inventory quantity and ordering quantity by statisticing the probability of the random require quantity. its purpose is to provide the relied basement for determining the most appropriate inventory quantity and ordering quantity, the deterring policy quality will be raised, so the damage caused by unfit inventory quantity and the benefit of the entrerpreneur will be raised. the research method is by building the inventory management information system, the system includes automated management of parts entering and going out the datasbase. requesting the records of parts entering and going out the datasbase and displaying the sygonal when the inventory quantity is short out. computer calculating the fix period remaining, requesting remaining at any time and displaying if goods need ordering, all the partsof certain a product going out of basement and at the same time checking if the storaging quantity is enough. then simulating the most appropriate inventory quantity and ordering quantity simulating method is as follows : statisticing the random required quantity. calculating the probability, standing for the values with data range producing random data by function accordingly calculating the random required quantity. thenext step is simulating all the projects after pressing in the simulating conditions. finally selecting the best

    本文通過分析國內外關于庫存管理軟體的發展情況，提出在線統計貨物出庫情況的基礎上利用模擬方法確定最優存儲方案，其目的是為制定合理的貨物安全庫存量和訂貨量提供可靠的依據，提高企業管理人員的決策質量，從而減小資金的佔用和缺貨損失，提高企業的經濟效益。通過研製庫存管理信息系統使庫存信息管理自動化，也就是實現貨物入出庫管理計算機管理、自動查詢貨物入出庫情況並在缺貨時給予提示、使用計算機貨物余額定期結算、貨物余額實時查詢並顯示是否需要訂貨、裝配出庫管理使得只要輸入需要裝配產品代號和數量，組成它的所有零件就會自動檢庫和出庫。然後對安全庫存量和訂貨量進行模擬，模擬方法是首先自動統計貨物在過去某一段時間內的需求量，計算出概率，用隨機數的范圍表示其概率數值的大小，利用隨機函數產生隨機數、從而間接的產生隨機需求量，給定模擬天數和其他模擬條件模擬各種方案，從眾多的存儲方案中找出最優存儲方案。
  16. It is found ecn could n ' t solve the problem that the sender responds to congestion slowly, and the average queue length of router is sensitive to the static parameters of ecn. in chapter four we propose an algorithm called fecn, which provides congestion control and indication messages in router, so that the sender could response to congestion in good time. this algorithm can also adjust the max drop probability according to the active conne

    Ik的特性，而且平均隊列長度和網路吞吐量對ecn的靜態參數較為敏感，因此本文在第4章中提出了一種fecn演算法，該演算法在路山器處提供擁塞控制和指示機制，使源端能夠快速響應路由器發回的擁塞指示消息，調整發送速率，避兔擁塞的發生，該演算法還可以通過估計鏈路中的活動連接數動態調整最大丟棄概率。
  17. 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交換網路並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路最大吞吐率，平均信元時延和信元丟失率的封閉表達式，並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
  18. Under the condition of asymmetric distribution of npv probability, the probability of npv less than 0 can more accurately describe the risk of investment retun then the probability of npv less than 0 that concessionaire may accepted determines the condition satisfied by the economic parameters of concession contracts. with the premises of expected objective value of each parameter fixed by the designers of concession contracts and the weighted value of this parameter, an optimal objectiv

    特許權人可以接受的npv小於零的概率決定了特許權合約經濟參數需要滿足的條件，在特許權合約設計者可以對每個參數確定一個初始的期望目標值和該參數的權重條件下，本文通過構造一個優化目標函數，解決了合約經濟參數的優化選擇問題。
  19. Direct sequence spread spectrum ( ds ) signals have been widely used for secure communication and mobile communication known as code division multiple access ( cdma ) system. because ds signals have many advantages such as anti - jamming capability, low probability of interception, multiple access capability and so on

    直接序列擴頻通信具有低截獲概率，抗干擾能力強以及實現碼分多址等優點，因而在抗干擾通信及民用移動通信中得到廣泛的應用。
  20. 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，並考慮了rts _ threshold參數、通道誤碼率對性能的影響。
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