通道最大化 的英文怎麼說
中文拼音 [tōngdàozuìdàhuà]
通道最大化
英文
channel maximum-
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。Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece
將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義The asteroids are the most important small bodies in the solarsystem, and they mainly lies in the two locations - a main belt between the mars ' s orbit and the jupiter ' s and the near - earth space. the most feature of the orbits of near - earth asteroids ( neas ) is that the semi - major axes of the orbits are nearly equal to that of the earth or the perihelia distances are approximate to or even less than the mean distance between the sun and the earth, thus they could move into inside of the earth ' s orbit, so that they might close approach or even colliside with the earth ( or other planets, such as the venus, the mars, etc. ). the characteristic brings about some difficulties in the numerical research during their orbital evolution, which leads to the failure of the normalization technique in the general removal impact singularities of celestial mechanics methods and the symplectic algorithm which is successfully applied to the investigation in quality. by comparing the computation effects of several common numerical methods ( including symplectic algorithm ), and considering the nature of the movement of the small bodies, the corresponding treatments are provided here to improve the reliability of the computation
小行星是太陽系最重要的一類小天體，主要分佈在兩個區域；火星和木星軌道之間的一條主帶和近地空間.近地小行星軌道的最大特點是其軌道半長徑與地球軌道半長徑相近，或近日距離接近甚至小於日地平均距離，其運動可深入到地球軌道的內部，這將導致該類小行星與地球（還有金星、火星等）十分靠近甚至發生碰撞.這一特徵給其軌道演化數值研究帶來一些困難，包括天體力學方法中一般消除碰撞奇點的正規化處理以及對定性研究十分成功的辛演算法都將在不同程度上失效.通過對幾種常用數值方法（包括辛演算法）計算效果的比較，根據小天體運動自身的特性，給出了相應處理措施，從而可提高計算結果的可靠性Chemical fume hoods shall be of air foil design with 45 degree sloped sections on the sides and top of the hood opening to insure maximum containment and minimum eddying of air currents
化學通風櫃應採用風道設計，側面成45度坡度，罩頂開口，以確保抽氣量最大、空氣渦流最小。The thesis analyzed the present transferring status between pudong airport and shanghai " s incity. through forecasting the long - dated flux of pudong airport and the area near it and combining the planning scheme of shanghai urban rapid mass transit, the thesis learned the helpful experience of the traffic organization in typical airport abroad and used the scientific analyzing model of public traffic flux forecasting to put forward some reasonable suggestion of the bottleneck question between pudong airport and incity : the one is to use the present no. 2 subway as the future airtrain to take on the most part of the flux and meantime present the concept of feeder efficiency to quantitative analyze the choice of feeder station ; the other is to set up cat ( city air terminal ) to convenient the passenger to come airport rapidly and economically in order to lessen the pressure of the traffic and improve the whole service quantity of civil aviation transportation
本文分析了浦東機場與市內目前的換乘現狀，從預測浦東機場及緊鄰空港區域中遠期的客流量入手，結合上海市政府快速軌道交通的規劃方案，並且學習境外典型機場交通組織的有益經驗，利用規劃中的公交客流預測等科學分析模型，對浦東機場與市中心的軌道交通銜接提出了合理的建議：一是利用目前的地鐵二號線作為航空軌道共享線來承擔大部分進出空港的客流，並且給出了以接運效率最大化為目標函數的接運公交軌道站點比選模型；二是在市中心設立城市航站樓以方便旅客快速、經濟地到達機場，從而減少道路交通壓力，提高航空運輸的整體服務質量。To solve this contradiction we introduce the polarization track restriction and calculate the biggest scr ( ratio of signal to clutter ) of coherently and incoherently reflected waves
為了解決這一矛盾引入了極化軌道約束條件，計算了在極化軌道約束下相干情況和非相干情況下共極化通道最大接收功率與極化狀態的關系。The thesis defines the concept of asset securitization, expounds characteristic and the condition to use. analyses the relationship between the choice of financing tool and the firm value, express max firm value is a good standard to weigh the tool. then, through the ri model and finance theory, the thesis explains the motivations of asset securitization, demonstrates the influence effect on firm value by qualitative and quantitative analysis of cost - benefit of corporate asset securitization, and discusses the role of asset securitization to solve corporate financing puzzle and the future of asset securitization in our country
本文首先提出我國企業面臨的融資困境的實質是企業資本結構的不合理以及融資渠道單一影響的，即融資工具不能實現企業價值最大化;在對資產證券化的概念進行界定后，闡述了關于資產證券化的特徵，明確了資產證券化的特點和使用條件;分析了資產證券化工具的選擇與企業價值之間的關系，提出了企業價值最大化是衡量企業融資工具選擇是否合理的標準，為企業通過資產證券化融資提升企業價值提供了理論準備;然後，運用現代財務理論和剩餘收益模型，通過對我國企業資產證券化的實踐進行成本收益的定性和定量的效果分析，論證企業資產證券化對企業價值的影響效果;最後論述了我國實施資產證券化的現狀和未來發展，並且對我國實施資產證券化的具體方式提出了新的構想。They wish to share the distribution channels and customer resources. in fact, bancassurance which is the strategic alliance between bank and insurance is the best way to provide a package of financial services that can fulfill both banking and insurance needs in such legislative climate at present
銀行保險是被保險公司或銀行採用的一種戰略，通過一體化的形式滿足客戶多元化金融服務的需求，將銀行和保險等多種金融服務聯系在一起，並通過銷售渠道的共享實現價值的最大化。Regarding the capital, society, environment as restriction, taking freeway and rail transport as examples, the paper uses indifferent curve and budget curve to discuss how to combine reasonably the foundation of all kinds of regional traffic modes in the future, so as to achieve maximal social utility, and provide decision - makers with the basis in theoretical basis
摘要以資金、社會、環境等為界，以高速公路和軌道交通為例，應用無差異曲線和預算線平衡點方法，探討了如何將未來區域中各種交通方式的基礎設施建設合理組合，以達到社會效用的最大化，為交通規劃決策者提供了理論依據。It adopts the xbrothers professional security and facility control system which includes : the real - time monitoring and controlling for the electric power supply system ; the air conditioning control system ; the ups control system ; the leaking control system ; the fire alarm system ; the video surveillance system and ; the access control system. the system provides the fire monitoring and turn to emergency status when fire detects. the system alarms for the abnormal of the important field through adjusting dynamic detecting sensors, according to the demands in the video marking field
在該監控系統中，如果檢測到消防報警信號，系統會自動聯動門禁系統打開對于重要區域的視頻劃定動態檢測報警區域，根據機房內不同的環境情況，通過調節動態檢測靈敏度，來實現移動報警系統採用模塊化結構設計，可以方便的進行系統擴充，在本項目最初實施的過程中只安裝了一套指紋加刷卡的門禁系統，在使用的過程中，根據清算中心的要求，需要對機房內的另四道門加門禁系統，則監控系統在不影響原有系統正常運行的情況下，進行系統的平滑升級，最大化的保障系統的安全與用戶的投資。Thus the internet has transformed a large and growing number of retailers into “ multi - channel ” retailers with all sales channels ( stores, web, and catalog ) working as one to help retailers maximize the value of their brands
於是因特網有了很大的轉變，越來越多的零售商成為「多通道」零售商，他們具有所有的銷售通道（商店、網站和郵購） ，有助於零售商品牌價值的最大化。 。Based on the operator - sum representation of quantum channel, the quantum channel of single mode fermi system is parameterized. the maximum value of the amount of quantum mutual information, that is. the capacity of the channel aided by entanglement is given
基於量子通道的算符求和表示，將單模費米系統量子通道參數化，給出了量子互信息量的最大值，也就是在糾纏輔助下的經典容量的計算方法。( 3 ) for the wireless channels subject to several types of fading existing in different time scales, the dynamics of channel conditions are decoupled into two random processes with different mathematic properties in different time scales. two algorithms in this scheme are proposed to dealing with each time scale : the resource optimizer allocates the resource to maximize the total revenue with price fairness and provide qos guarantees to applications, and the slot scheduler exploits the time variability of
（ 3 ）針對無線通道衰落的多時間尺度特性，將通道條件snr分解到不同時間尺度上，在不同時間尺度上針對不同的衰落特性來設計不同的演算法，完成不同的任務：在大時間尺度（幀）上進行資源分配，面向應用提供qos保證，保持應用間price公平性的情況下，尋求系統總收益utility的最大化；在小時間尺度（時隙）上進行時隙調度，利用各用戶通道容量的時變性，使各用戶獲得比平均通道條件情況下更高的吞吐量。The defect of thes powe control and allocation method is without consideraon of the induence of all of the other users on the desired user and the influence of time - varying channel, so it can not maximize the capacity, and deduces the frequency waste
這種功率分配與控制方法的缺點是沒有考慮到系統內其他用戶對期望用戶的影響以及通道時變特性的影響，不能最大化系統的容量，造成了頻譜資源的浪費。Therefore, according to the consumer angle and guided by the target - consumer, it is naturally profound to research on the brand of interactive dissemination 。 based on the review of the theory on the process and characteristic of the brand of interactive dissemination 、 the element system of brand formation and the choose of media, this article attempts to establish one kind of effective interaction communication pattern to solve the problem in the brand and consumer ' s interaction dissemination
本文在分析品牌互動傳播的過程、特點、品牌形成的要素體系、媒介的選擇等品牌基礎理論的回顧的基礎上，試圖建立一種有效的互動溝通模式來解決品牌與消費者之間的互動傳播問題。即通過建立一種及時準確的信息傳達反饋渠道，迅速調整品牌傳播中與消費者沖突以及難以認知部分，做到品牌收益最大化。Credit possess some specific economic meanings such as reputation and faith, it becomes the economic category reflecting the relationship of human behavior with economy
廣義上的信用通常表現為一個倫理學范疇，是指經濟主體之間，以謀求長期經濟利益最大化為目的，建立起來的以誠實守信為道德基礎的履約行為。The signal ' s energy is made unitary by whiten before detection in order to simplify the expression of kurtosis. after that we also make use of the advantage of subspace separation to reduce the rank of the signal. thirdly, in order to suppress the effect of time various channel, the adaptive signal processing techniques are studied and an improved adaptive method based on lms ( least mean square ) is proposed
為了能更好的跟蹤通道的變化，論文還研究了自適應信號處理的方法，並針對最小均方誤差的方法進行了改進，改進后的方法在收斂速度比傳統的最小均方誤差方法有很大改進，並且和傳統方法相比它還有收斂速度對收斂步長不敏感的優點。Next, based on the throughput performance of fixed modulation schemes in packet transmission, adaptive modulation with throughput maximization under fading channel is investigated and significant throughput improvement is obtained
接著，基於固定調制方案的分組傳輸吞吐量性能，本文研究了衰落通道中吞吐量最大化自適應調制技術，該方法可以取得顯著的吞吐量性能增益。Concerning with the direct sequence ( ds ) cdma system, this thesis focuses on several issues related to orthogonal spreading sequences and amc, including correlation properties of orthogonal variable - length spreading sequences and their effects on ds cdma system performance, performance of multicarrier ( mc ) ds cdma system with generalized orthogonal ( go ) sequences, adaptive modulation with throughput maximization, performance of adaptive turbo - qam coded modulation in generalized fading channel and performance of amc in wcdma high speed downlink packet access ( hsdpa )
針對直接序列碼分多址（ dscdma ）系統，本文主要研究了正交擴頻序列和自適應調制編碼若干問題，包括正交變長擴頻序列的相關性及其對dscdma系統性能的影響、採用廣義正交（ go ）序列的多載波直接序列碼分多址（ mcdscdma ）系統性能、吞吐量最大化自適應調制、自適應turbo - qam編碼調制在廣義衰落通道中的性能，以及wcdma下行分組接入（ hsdpa ）中自適應調制與編碼性能五個方面。The urbanization construction in western national regions should open multi - source investment channel, open urbanization constructing markets, eliminate the unreasonable admittance barriers of non - national investment, optimize the source pattern of investment according to project financing, finical financing and bond financing of local government and design corresponding legal system to protect it according to the thoughts of benefit maximization in law and economics
摘要西部民族地區城鎮化建設應開辟多元投資渠道，開放城鎮化建設市場，清理對非國有資本的市場準入障礙，通過項目融資、金融融資、地方政府債券融資等途徑，優化資金的來源模式，並且必須從法律經濟學效益最大化的思想出發，設計相應的法律制度進行保障。分享友人