進化與輪子 的英文怎麼說
中文拼音 [jìnhuàyǔlúnzi]
進化與輪子
英文
evolution and wheels-
Vsp is both a pivotal tache in logistic distribution optimization and indispensable in electronic commerce. it can increase logistic economic benefit and realize logistic rationalization. the systemic study on the theory and method of vsp is the base on the growth of logistic intensivism, the establishment of modem chain of command, the development of its and ec. now, the problem is not only applied to the field of auto transportation, but also to ship avigation communication electricity industry management computer application etc. the algorithm has been applied into many combinatorial optimization problems such as the trainman ' s shift arrangement in avigation the optimization design of cargo arrangement in ship company
對貨運車輛進行調度優化，可以提高物流經濟效益、實現物流科學化。對貨運車輛調度優化理論與方法進行系統研究是物流集約化發展、建立現代調度指揮系統、發展智能交通運輸系統和開展電子商務的基礎。目前，問題的形式已有很大發展，該問題以不僅僅局限於汽車運輸領域，在水運、航空、通訊、電力、工業管理、計算機應用等領域也有一定的應用，其演算法已用於航空乘務員輪班安排、輪船公司運送貨物經過港口與貨物安排的優化設計、交通車線路安排、生產系統中的計劃與控制等多種組合優化問題。This paper mainly aims at the strategic demands for large - aperture lightweight mirror proposed by high - tech development. its main research contents are : select material blank for lightweight mirror according to physical and chemical properties of optical glass ; analyze and calculate the deformation quantity of the mirror with finite element method ; design and optimize mirror body structure of 400 lightweight plane mirror and 450 lightweight spherical mirror, analyze glass cutting principle, design specisl - use grinding wheel structure, select reasonable technological parameters to implement the processing of weight reduction holes on 400 plane mirror ; analyze etching mechanism of hydrofluoric acid, look for the technological parameters such as the optimal acid concentration and etching time etc. ; eliminate the stress of weight reduction holes and micro - cracks on 400 lightweight plane mirror ; discuss the processing principle and
本論文的研究主要是瞄準國家高技術對大口徑輕型鏡的戰略需求而開展的。主要研究內容是：根據光學玻璃的物理與化學性能，選擇輕型鏡坯材料；用有限元法對鏡子的變形進行分析、計算，找出變形規律，優化設計400mm輕型平面鏡、 450mm輕型球面鏡鏡體結構；分析玻璃切削原理，設計專用磨輪結構，選擇合理工藝技術參數，完成400mm平面鏡輕量化減重孔的加工；分析氫氟酸腐蝕光學玻璃機理，尋找最佳酸濃度、腐蝕作用時間等工藝參數，實現400mm平面鏡減重孔應力與微裂紋的消除；討論分離器加工原理和工藝技術特點，完成400mm平面輕型鏡面形加工。3. the trapping characteristics of ordinary helical gear pump are lucubrated by theory for the first time, the theoretic relation of the gear rotor between the end overlap coefficient and trapping phenomenon is discussed respectively with clearence or without clearcence, and the relation of trapping volume with the rotational angle turn is also discussed. the selective range of the helical angle that can eliminate completely the trapping of helical gear pump is gained, which never appeared in literature before
首次對普通斜齒齒輪泵的困油特性進行深入的理論研究，分別討論了有側隙和無側隙時普通斜齒齒輪泵轉子的端面重合度與困油現象之間的理論關系，以及困油容積隨轉角的變化關系，得到了完全消除斜齒齒輪泵困油沖擊的螺旋角機械科學研究院博士學位論文的選擇范圍。The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either
在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。On the one hand, the steam simulation system can make up a dis ( distributed interactive system ) with other sub systems to simulate the actual engine room performance and give trainees comprehensive training. on the other hand, the steam simulation system can be operated alone as a marine boiler training system
蒸汽模擬子系統可以與其它模擬子系統以數據服務器為中心、以星型網路結構構成分散式模擬系統（ dis ） ，對輪機人員進行綜合的訓練；也可作為單獨的鍋爐模擬培訓系統，或作為《輪機自動化》 、 《鍋爐與汽輪機》等課程的輔助教具。In this paper, the multifactors - electrical, thermal, cool and thermal circulation of accelerating ageing experiment based on the stator bar of 220mw turbine generator has been conducted in the laboratory. the results of the experiment show that there has not fixed rule between maximum pd quantity and insulation, but the increasing of maximum pd grads increase along with ageing time of insulation
本論文通過對220mw的汽輪發電機真機線棒進行電、熱、冷熱循環等多因子老化試驗，發現局部放電的最大放電量與絕緣老化時間之間沒有固定的規律可尋，而最大放電量的梯度隨絕緣老化時間的增大而增大。Then, in the main system, neural network was adopted to construct the response relation between impeller performance and meridional channel design variables, where the training sample data were schemed according to the design of experimental method, and the effect of blade shape on the impeller performance was taken into account and the meridional channel was optimized
然後，在中心系統內利用試驗設計理論安排訓練樣本，採用神經網路建立葉輪性能與子午流道設計參數之間的響應關系，同時計及葉片形狀對葉輪性能的影響，對子午流道及葉片進行優化。A kind of polishing wheel installed in the equipments imported from germany or czechoslovakia and in the polishing machine for crystal glass decoration, which is made from high flexible macromolecule, aluminum oxide and cerium oxide
一種安裝在德國、捷克進口設備以及國內自主研發的水晶玻璃飾品研磨機上的拋光盤（輪） ，它是由高彈性和高強度的高分子材料與很鋒利的拋光性能極佳的氧化鋁、氧化鈰等軟質磨料進行混合反應而製作。With the development of computing technology, the new marine engine room simulators emerged from time to time until mid 1980 ' s when it was developed into multi - computer assisted simulating system, its working site and the hardware being gradually able to correspond to the real ships. since 1990 ' s the network technology has been applied to the engine room simulators, as provide the data communication between marine engine facilities and computer network, thus expanding the sub - network of student stations
隨著計算機技術的發展，輪機模擬器不斷地推陳出新， 80年代中期已發展成為多微機模擬系統，訓練的場所和硬體設施也逐步與實船相對應， 90年代起網路化技術運用於輪模擬器，不但將船舶機艙設備和艙室用計算機網路進行數據聯絡，並且擴展了學生訓練站的子網路。Tools of matlab / simulink have been used to imitate and model the control system of the codog power plant, a modular design approach from top to bottom has been used for modeling, the whole system includes the diesel and digital governor model, hydraulic coupling model, control system model of gas turbine, s. s. s
本文運用matlab simulink模擬工具對codog物理模擬實驗臺進行了建模與模擬，建模採用自頂向下和模塊化的設計方法，整個系統包括柴油機及電子調速器模型、液力偶合器模型、燃氣輪機控制系統模型、 s分享友人