波前擴展 的英文怎麼說
中文拼音 [bōqiánkuòzhǎn]
波前擴展
英文
wavefront spread-
At each interface the spreading wave front is made discontinuous.
在每一分界面上擴展的波前出現間斷。The most outstanding function of this wheelchair is its height which can be regulated with user ' s requirements. this function helps expand the user ' s available space, supplement the user ' s body defect and reduce the caregiver ' s burden. it get more improved than previous products. besides, the wheelchair has designed both manual and eletric mode. on one hand, it can save user ' s energy and power, on the other hand it won ' t leave users hopeless in case of powering off and relieve the user ' s worriness. in addition, the bigger basket on the tail part of the wheelchair provides the great convenience for user ' s carrying goods. multiangular back and height - regulated pedal add comfortableness to users. the minidesk with the wheelchair is very convenient for users to read, write and do other things
本設計的多功能輪椅最突出的一個功能就是座位的高度可以根據使用者的需求隨意進行調節，這樣就可以大大擴展使用者的操作空間，補充了使用者在身體上的缺陷，也可以減輕照顧人員的工作負擔，比起以前的產品有了較明顯的改進；其他功能還有輪椅的手動電動兩種驅動方式，這樣可以解決老年人和殘疾人在體力上存在的問題，同時在外出時遇上沒電的情況也不至於顯得無能無力，消除了使使用者在長途奔波時的顧慮；此外位於輪椅尾部的超大儲物筐，給使用者攜帶物品帶來了極大的方便，靠背的多角度調節，腳踏板的高度調節大大增加了使用者的使用舒適度，輪椅上小桌的設計給使用者讀書，寫字，進行其他活動帶來了極大的方便。Shortwave channel is time varying transmission channel. it has dispersion in frequency and time domains. this characteristics hinds the data transmi - ssion at high speed and the correction of received data. in this dissertation i have analyzed the statistic characteristic of shortwa - ve channel, established the model of shortwave channel and simulated the rayl eigh fading distribution. the technology of spreading spetrum has been proved that it has the capability for anti - multipath and discerning multipath
在短波通信中，由於通道的時間色散和頻率色散，引起多徑展寬和多徑衰落，前者限制了數據的傳輸速率，後者造成短波數據通信中出現突發錯誤，為了解決多徑效應對短波通信的影響，本文所做工作如下：首先詳細分析了短波通道的統計特性，建立其數學模型；其次分析了擴頻通信的特點，從理論上證明擴頻技術不僅具有抗多徑干擾能力，而且具有分離多徑的能力；介紹了傳統的rake分集合併技術的特點。This paper is aimed at professional analysis of the generation mechanism and some basic points on business cycle fluctuation of real estate industry, and further study of the characteristics of business cycle fluctuation of real estate industry and its relationship with macroeconomic business cycle. writer is prefer to conclude that policy cycle fluctuation is a fundamental cause on business cycle fluctuation of real estate industry in the period of chinese economy system shift. in the end writer su
本文集中分析和研究了房地產經濟周期波動的生成機理等基本理論性問題，探討了我國房地產經濟周期波動的特徵及其與宏觀經濟周期的相互關系，提出了當前我國經濟轉軌時期，政策周期波動是房地產經濟周期波動的根本原因觀點，同時提出了應對周期波動的房地產業發展政策建議，這些不但是對經濟周期理論的創新，而且更是房地產經濟周期波動理論的擴展。And more aperture extension is achieved in this novel esprit - based two - dimensional angle estimatio n scheme using a uniform rectangular array of vector hydrophones spaced much farther apart than a half - wavelength. this proposed scheme and the attendant vector - hydrophone array outperform a uniform half - wavelength spaced pressure hydrophone array with the same aperture and slightly greater number of component hydrophones by an order of magnitude in estimation standard deviation
結合實際的應用情況，對矢量水聽器構成的陣列進行了初步的探討，利用本文前面部分所分析的基於單矢量水聽器的方法，實現了陣元間距突破半波長上限的局限，並解決了角度估計的循環模糊問題，以較小的硬體代價和運算代價實現陣列孔徑的擴展，提高估計精度。Rmb deposit and loan interest rate float block expands gradually, and progressively move towards marketization day by day. part iii : on the basis of using the experience and lessons of the change of interest rate in other countries for reference in course of the interest rate marketization, it is believed that there should be a course of raising up slightly in the interest rate in the early stage. but the market fluctuations it causes will not be too much ; according to actual operation result and a medium or long term of the reform, foreign currency interest rate has already drawn close to international interest rate competence progressively ; viewed from a short time, rmb loan interest rate total competence will tend towards dropping, some loan interest rate may rise ; the interest rate of the deposit will raise up unilaterally
總體而言，發展中國家的存貸利差要高於發達國家；第二部分：在總結前幾年利率改革包括市場化改革的基礎上，認為，迄今為止，我國利率市場化改革的程度總體上還比較低：同業拆借利率、貨幣市場債券回購利率、現券交易利率、外幣貸款利率、大額外幣存款利率等已完全市場化或基本市場化，人民幣存貸款利率的浮動區間已逐漸擴大，並已漸進的方式日益走向市場化；第三部分：在借鑒境外利率市場化過程中利率變動的經驗教訓的基礎上，認為在我國利率市場化的初期，利率應該有一小幅上揚的過程，但是其造成的市場波動應該不會太大；從改革的實際運作結果和中長期來看，外幣利率已經逐步的向國際利率水平靠攏；從短期來看，人民幣貸款利率總水平將趨于下降，部分貸款利率有可能上升，存款利率將會單邊上揚。This thesis regard internal property reorganization in the group of pangang as the research object, from chengdu seamless steel pipe limited liability company with chengdu iron and steel works inside exterior environment reorganizing in front and back commences, making use of to exceed the makel - bot with of five factors competition models and the method of factors analysis, after analyzing the reorganization of the business enterprise a profession for facing competes the situation. develop the development the business enterprise with the profession industry from the international local profession rival circumstance after analyzing the reorganization should the market position of the establishment with develop the strategy target. make use of the swot the analysis the method, to after the reorganization the development strategy of the business enterprise, from manage the angle proceeded the fixed position analyzes, for after the reorganization business enterprise development provided four kinds of developments strategy that eligibility choose : the brave development strategy, request the resources advantage, funds advantage, human resource advantage, technique advantage that new company make the most of new business enterprise in empress in reorganization, is an essential condition to increases to manage the level, quickly technique reforms, develop the high and additional worth product with new product production line, as soon as quikly change to strong and large business enterprise, realizes soon steel aircraft carrier dream ; dispersion strategy, the technology market quota with deal with produce high additional worth product, completely promote business enterprise brand image, extend high carry product of the exaltation product, is a necessary means to increases business enterprise performance, realizes business enterprise target ; defense strategy, adjusting the business enterprise organizes construction, reducing the intensive type in labor and the low additional worth product line, lower bad the property saves the deal, alleviating the business enterprise burden, attaining the casual wear go to battle, benefitting to the challenge that make frontal attack the rival ; withdraw strategy, compress the production of the high depletion and high cost product, simplify the production craft, controlling the cost of the end product in the lower level, is a valid path to increases business enterprise competition ability
本論文以攀鋼集團內部的資產重組為研究對象，從成都無縫鋼管有限責任公司與成都鋼鐵廠重組前後的內外部環境入手，運用邁克爾?波特的五力競爭模型及因素分析法，分析了重組后的企業所面臨的行業競爭態勢。從國際國內行業競爭對手情況和本行業發展動態分析了重組后企業應確立的市場地位和發展戰略目標。運用swot分析法，對重組后企業的發展戰略，從管理角度進行了定位分析，為重組后企業發展提供了可選擇的四種發展戰略：即大膽發展戰略，要求新公司充分運用重組后新企業的資源優勢，資金優勢，人力資源優勢，技術優勢，是提高管理水平，加快技術改造，開發高附加值產品和新產品生產線，盡快立於強勢企業之林，早日實現「鋼鐵航母」夢的必要條件；分散性戰略，提高產品的科技含量和生產高附加值的產品，全面提升企業品牌形象，擴大高端產品的市場份額，是提高企業效益，實現企業目標的必要手段；防禦性戰略，調整企業組織結構，削減勞動密集型和低附加值產品生產線，降低不良資產存量，減輕企業包袱，做到輕裝上陣，有利於迎擊競爭對手的挑戰；退出性戰略，壓縮高消耗、高成本產品的生產，降低低端產品的比例，精簡生產工藝，將最終產品的成本控制在較低水平，是提高企業競爭力的有效途徑。This paper presented a general systematic view, application and current development of the power line carrier transmission technology, and clearly compared some existing power line carrier communication chip with each other. then the authors analyze the channel " s characters of low voltage power line, and formed an abstract carrier channel model. using this as its basis, a new kind of transmission technology is designed that adopted transmission technology combining the spread spectrum modulation with channel coding, which can solve the problems above mentioned to a certain degree, and need not pay for high cost
文章不僅全面地介紹了電力線載波通訊技術的特點、應用及其發展狀況，還對目前的電力線載波通訊晶元進行了比較；並通過對低壓電網通道特性的分析和研究，抽象出其載波通道模型，在此基礎上，提出了將擴頻調制和通道編碼相結合的傳輸技術用於低壓電力線載波通信，這可以在很大程度上解決電力線的干擾問題，且不必付出高昂的代價。Firstly, the paper, combining the characteristic of synchronous pulse bursts and inhibition with the modified pcnn model, presents a way of finding the foveation points in the images adaptively and effectively, and simulates the human vision system. secondly, pcnn is extended to pcnns, based on the properties of information couple and transmission, an algorithm that is used to fuse images of the same target got by several sensors to an image is presented to simulate the human vision system. thirdly, combining the properties of synchronous pulse bursts, capture, and transmission and competition of waves, the paper presents two ways of classification, one is an algorithm based on the properties of neuron to capture and inhibit to classify the data taking on any complex unlinear distribution robustly, the other is based on the restricted distance and modified of the former to remove the influence of inferior samples in classification ; fin ally, based on the accumulative difference pictures, and the forming and transmission of pcnn wave, selecting and controlling the direction of autowave by connecting the neighbouring neurons selectively, the paper presents a way to simulate the tracks of moving object and detect the moving direction
首先結合pcnn的同步脈沖發放和側抑制特性，提出了基於改進型pcnn的圖像凹點檢測演算法，該演算法是一種自適應而有效的圖像凹點檢測方法，並且較好地模擬了人類視覺系統；然後，結合信息傳遞和信息耦合特性，將pcnn擴展成pcnns （ pcnn網路群） ，提出了一種基於pcnns的圖像融合演算法，能夠將多個傳感器獲取的同一目標的圖像信息融合到一幅圖像中，有效模擬了人類視覺系統；另外，結合pcnn的同步脈沖發放特性、捕獲特性和波的傳播競爭特性，開拓地將pcnn用於模式分類中，提出了基於耦合神經元點火捕獲抑制特性的分類方法和改進的約束距離下的pcnn分類方法，前者可實現對樣本空間中任意復雜分佈訓練樣本的穩健非線性分類，而後者能夠消除訓練樣本中刺點對分類的影響；最後，結合累積差分圖像思想、 pcnn波的形成與傳播特性，通過各神經元之間連接取向來選擇與控制自動波的流向，將pcnn用於運動視覺分析中的運動軌跡模擬及運動方向檢測。The speed sensorless techniques for dtc system are very fascinating and challenging subjects recently, they are received wide attention in the literature. some brief description is provided. the proposed approaches are based on speed model of dtc, motor reference adaptive control, the instantaneous reactive power of motor and the extended kalman filter
無速度傳感器調速系統是直接轉矩控制研究領域內一個非常熱門的研究方向，本文介紹了無速度傳感技術的發展歷史及目前的研究狀況，分別利用直接轉矩控制的轉速模型方法，模型參考自適應方法、電機定子反電動勢以及擴展的卡爾曼濾波器等方法設計了無速度傳感器系統，對于其數學模型和系統構成作了比較詳細的推導。Abstract : the characteristics of wavelet transform and its significance in image edge extraction are presented. the detailed steps for the extended target centroid calculation with wavelet transform are described. extracting target ( airplane ) centroid coordinates when airplane images are in the background noise conditions with different image fuzzy degrees by using wavelet transform, the extracting accuracy for target centroid coordinates under the different image fuzzy degrees and background noise conditions are compared. the application prospect of wavelet transform in the extended target tracking is shown
文摘:介紹了小波變換的特點及其在圖象邊緣提取中的意義，說明了擴展目標用小波變換進行目標形心計算的詳細步驟，並以飛機圖象為目標在不同圖象模糊程度及背景噪音情況下用小波變換進行了目標形心坐標提取，比較了不同圖象模糊程度及背景噪音情況下目標形心坐標提取的精度，展示了小波變換在擴展目標跟蹤技術中應用的前景。After introducing characteristic and hardware structure of dsp, 1 decide to adopt current excellent performance integrate dsp and its tap system ; after i know this, this paper present a software and hardware scheme which is based on fault signal " data acquisition and processing by using advanced dsp technology, and in arithmetic aspect, a dsp based real - time digital filter comes true. this simplifies the system design and improves the stability and real - time property of data acquisition. adopting a dsp integrate plank ( including a dsp cmos chip and external storages ) and using software to manage and prepare entire system can improve greatly the extension, maintenance and common of the application system
在闡述了dsp的硬體結構及特點之後，結合本課題的研究方向，本文決定採用目前最高性能的dsp集成板及其開發系統，並在了解此集成板的硬體結構和開發環境的基礎上，提出了利用先進的dsp技術來實現故障信號的採集與處理的軟硬設計方案，並從演算法方面實現了dsp的實時數字濾波，簡化了測試系統的設計，提高了測試儀器的實時性；而採用dsp板卡（上面含有一個dsp晶元及外存） ，通過軟體對整個系統進行調配和管理，可以極大地提高應用系統的可擴展件、可維護件及通用性。Multicarrier wireless communications have been widely investigated in the past decades. recently, two - dimensional spread spectrum ( 2d - ss ) system has drawn a lot of attention because of its full utilization of spreading characteristics in the frequency domain and time domain. compared with multicarrier code division multiplex access ( mc - cdma ), 2d - ss system can effectively mitigate multiple access interference ( mai ) due to spreading in the time domain
當前多載波無線通信技術得到了廣泛的研究，二維擴頻通信系統是近年來提出的新的擴頻通信方式，由於二維擴頻系統從時域和頻域上分別對數據信號進行頻譜擴展，因此它同時具有時域擴頻和頻率擴頻通信系統的特點，是對傳統的一維時域直接序列擴頻和多載波擴頻的推廣。分享友人