束線形 的英文怎麼說
中文拼音 [shùxiànxíng]
束線形
英文
pencil-
Optimum beamforming algorithm for pre - fft ofdm adaptive antenna array
自適應天線陣的最佳波束成形演算法To select a cylindrical plane cathode ; to design proper focus electrodes in order to control the formation of beam in methods of solving equations, electrobath and simulation aided by computer. to correct effects of anode hole and work out curves of designing guns ; to discuss plasma cathode guns at last
選用圓形平面陰極;設計恰當的聚束極形狀以控制電子束的成形，並使用解析法、電解槽法和數值方法三種方法進行設計;考慮陽孔效應對電子束傳輸的影響，修正陽孔效應，給出電子槍設計曲線;最後討論一下等離子體陰極電子槍。The paper studies three key problem of base station array antenna for mobile communication, controlled radiation pattern, beam width and passive intermodulation
本文研究移動通信基站天線中的三個關鍵問題，波束賦形、波瓣寬度、無源交調。The content of the paper is nonlinear analysis of complete response process for t, l - shaped and " + " shaped section r. c. columns under axial compression and biaxial bending. on the basis of related papers, the full path of stress - strain relation of concrete and the sliding of longitudinal reinforcement anchoring are all considered, simultaneously, the restriction effect for concrete by thickening of stirrups is also included
本論文主要內容是對鋼筋混凝土異形截面雙向壓彎柱（包括l形、 t形、十字形柱）進行非線形全過程分析，在有關文獻基礎上考慮了受拉縱筋和周圍混凝土的錨固滑移和混凝土應力?應變關系曲線的下降段，同時考慮到在箍筋加密區箍筋對混凝土的約束影響。In the next generation of wireless communication, the base station antenna should have these functions : integration of different diversity methods to release multi - path fading, beam - downtilt to reduce co - channel interference, beam - forming to optimize coverage
在設計新一代移動通信基站天線時，應使天線能綜合各種分集方式進行天線分集以消除多徑效應，具有波束下傾以減少同頻干擾，能波束賦形以實現優化覆蓋。We have developed the theory of boundary shielding approximation of electric polarization, from which the values of spontaneous polarization of some typical ferroelectric materials can be derived. the shielded charges in ferroelectricity are in the state of surface bound polaron - dipole whose creation and annihilation must span a potential barrier. by introducing statistical method, four types of typical electric hysteresis loops of some common crystals and ceramics have been given, which are well consistent with the experimental results
利用電極化的邊界屏蔽近似，可計算出一些典型鐵電單晶的自發極化強度.鐵電屏蔽電荷處于表面束縛極化子偶狀態，其產生和湮沒要跨越位壘.由統計方法給出的一些常見晶體和陶瓷的四種典型電滯回線形狀，和實驗觀察到的結果一致A design of beam shaping of an array antenna
一種陣列天線的波束賦形設計The smart antenna, which is adapted in the wireless mobile communication system, in fact, forms an antenna with a high gain. thus communication in all directions can be proceeded, then base station antenna coverage, system capacity and service quality are improved, also inter - symbol interferes and multi - access interfere are reduced. the space division multiple access ( sdma ) is introduced, and users can be distinct from each other through their special location
在無線移動通信系統中採用智能天線技術，實際上是通過數字信號處理，使天線陣為每個用戶自適應地進行波束賦形，相當于為每個用戶形成了一個可跟蹤它的高增益天線，從而即可以進行全方位通信，也可以用較小的發射功率覆蓋相同的范圍以及提高系統容量和業務質量、降低用戶間的碼間干擾和多址干擾。In this thesis, we introduce the smart antennas and mainly examine the performance enhancements that can be achieved by employing sa in scdma wireless access system. in the part of introduction of smart antennas, we discuss the switched - beam arrays realizing by mending butler network at first. then we compare the different beam forming algorithms in sa
在對兩大類智能天線系統的介紹中，本文首先討論了一種以改進的butler網路實現波束賦形的多波束切換系統，推導了該天線陣的饋電模型並給出了模擬結果；然後，本文對智能天線波束形成演算法進行了比較，總結了不同演算法的優缺點，並給出具有代表性的演算法描述與模擬。There is a lack of analysis apparatus of magnet, the new system is only a opened loop control system, if we add the analysis part of the ion eletrostatic accelerator someday, all that we need to do is adding analog module hi plc and sampling control arithmetic hi the computer program. we will get a perfect closed loop control system
在目前缺乏磁分析儀的情況下，該系統雖然還只是開環控制系統，但是一旦加速器中束線分析部分到位，它只需增加模擬量輸出模塊和采樣控制演算法，就能形成完善的閉環控制系統。The article studies how to create 3 - dimensional model of crossroads in virtual environment and discusses mathematics model of horizontal alignment, the paper explains crossroads data visualization and defines data structures of visual data
本文從虛擬現實建模入手，研究虛擬環境下的立交橋三維建模方法，探討基於約束的平面線形的數學模型。Then ending line is perpendicular to the orientation line and passes through one of the corners of the rectangle
結束線與方向線垂直，並經過矩形的一個角。Genetic algorithm assisted beamforming algorithm for circular antenna array
基於遺傳演算法的圓形天線陣波束成形演算法The array antenna is optimized used genetic algorithm. pi algorithm is used in genetic algorithm. the results are given
在波束賦形中，採用遺傳演算法對天線陣列的激勵參數進行優化，同時引入比例積分演算法，得到較好的結果。With the development of software radio, the signal can be digitized at rf or if, then be received using digital beamforming in baseband, which can extremely improve the capacity and enhance anti - jamming capability of wireless communication
隨著軟體無線電技術的發展，採用全數字處理，在基帶通過對接收和發送信號的波束賦形，可以極大提高無線通信系統的容量和抗干擾能力。We have shown for the first time, which the profile of the probe beam becomes a crescent moon shape when it is focusing
我們首次通過非線性薛定鄂方程得到信號光束波形在聚焦時是彎月型的結果。In order to assure that the stress and strain state of structure is secure, the author analyses respectively the objective functions of the reasonable finished state and buckle - cable adjusted phase ; thus, the optimized model based on fga is framed. finally according to the example, the computation datum are compared with the iterative forward analysis method and the optimal control theory. the result shows that this method can be used conveniently and meet the construction and design precision
為了滿足大跨度鋼管混凝土拱橋施工的安全性與成橋預期的內力狀態和拱肋線形，本文結合工程實例，分別對合理成橋狀態和扣索索長調整的目標函數的確定進行了分析，將一組多變量、多約束的最小化問題無約束化，從而建立起適合於該問題的遺傳演算法優化模型，將其計算結果分別與迭代前進法和隨機最優控制理論進行了比較；結果表明，採用該方法編制的基於結構計算的遺傳優化程序操作靈活，能很好的滿足施工和設計要求。Normally there are hundreds of cables in a continuous beam bridge, especially in an indeterminate structure. and the shape of the prestressing cable is complicated, so it has great difficulties in its drawing
預應力鋼束因其線形變化多，大都又呈曲線狀，而對于大型復雜的預應力結構，如連續梁橋，往往有幾百根鋼束，幾十種形狀，所以鋼束圖的繪制任務繁重。By fitting reasonable external prestressing tendons to ensure ultimate bearing capacity of the bridge, to ensure stress reserve of the main beam, to reduce effectively principal tensile stress, to renew line state of bridge structure and gradient
通過合理地設置體外預應力束，確保了該橋的極限承載能力；增大了主梁的應力儲備；有效地減少了主拉應力；恢復了橋面線形和坡度。This technique also shows that it can simulate deformation effects constructed by other geometric primitives, such as ellipsoid and torus
另外，利用擴展的曲線幾何約束變形方法，還可以模擬諸如橢球和圓環體的變形效果。分享友人