理論最佳體形 的英文怎麼說
中文拼音 [lǐlúnzuìjiātǐxíng]
理論最佳體形
英文
theoretical optimum shape-
Fluid noise mainly comes from out put pulsation of rate of flow, the main reason of out put pulsation of rate of flow is the instant high pressure return flow that obturation cubage produced when the big round curve pressure transition. the v trough on the port plate can reduce the fluid noise. in this paper, the author based on the acting of dam a river and condensability of liquid and used matlab language as tool to calculate the v trough on the original port plate and drew out the p - t diagrammatic curve and analyzed its shortcoming and improved the design of original v trough and got that the best size of its angle was 12. 3 and its length was 5mm and the cross section was an equilateral triangle
流體噪聲主要來源於輸出流量脈動，造成輸出流量脈動的主要原因是閉死容積在大圓弧段壓力切換時產生的瞬時高壓迴流，在配流盤上開設v型尖槽可降低因高壓迴流而引起的流體噪聲，本文以截流作用和液體的可壓縮性為理論依據，以matlab語言為工具，對原配流盤上的v型尖槽進行了理論計算，繪制出p - t圖線，分析了它的不足，並對原有v型尖槽進行了優化設計，得出了v型尖槽的最佳幾何尺寸：配流盤平面上的v型尖槽的兩邊的夾角為12 . 3 ，槽長5mm ，槽的橫截面為等邊三角形。This part is set up for analyzing systematically the relationship between rli and rural economic development, summarizing the influence law of rli to rural land management benefit, analyzing the innovative mechanism, institutive achievement and difficult position and gauntlet of the present rli in china so as to lay a practical foundation for the innovation design of rli. the third part from chapter 6 to chapter 8 is innovation. in this part, the binding factors, innovative objective and basically guiding ideology of present rli innovation have been analyzed first, then according to the basically theory that relations of production must be suited to productive forces and the basically demands of socialist market economic system, in the light of peasant ' s receptive level and receptive capacity, the innovative model by stages of rural land property rights has been made, finally, the relationship between family farming and farming in scale has been analyzed, the latent profit and its binding factors of present family farming have been expounded, the concrete measures of perfecting family farming institution and pushing on the farming in scale have been put forward
第六章根據制度創新理論和市場經濟理論，結合我國國情，論述了現階段我國農地制度創新的制約因素、創新的目標及基本指導原則，確定了我國農地制度創新的方式；第七章根據生產關系必須適應生產力發展水平的馬克思主義基本原理和建立社會主義市場經濟體制的要求，結合我國現代化建設分「三步」走的戰略目標及農民的接受程度和能力，認為我國未來的農地制中文摘要度不應該拘泥於某一固定模式，而應該建立在系統連貫性的動態優化組合和階段性漸進演化的基本格局之中，並構建了我國農地產權制度的階段性創新模式:第八章通過對農業生產的特點和家庭經營的優勢分析，結合發達國家農業發展的經驗，提出了家庭經營是我國21世紀農地經營的最佳組織形式的結論;論述了農業家庭經營與農地規模經營的關系，分析了現階段我國農業家庭經營的潛在收益及其實現的制約因素，進而提出了完善農業家庭經營制度和推進農地適度規模經營的具體措施。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。Based on nonlinear finite element theory, stress and deformation behaviors are analyzed after ground stabilization and foundation pit reinforcement with deep mixing method. by comparison of the conditions of treatment and non - treatment of two examples respectively, the results indicate that the match ratio scheme used for deep mixing method is more ideal when soft clay is stabilized in this area of fuzhou in the thesis. this scheme not only can fully utilize industrial waste material, but also can economize construction cost
對于加固土的工程特性，本文以非線性有限元理論為基礎，模擬分析水泥攪拌樁加固地基和基坑支護加固的應力和變形情況；通過兩個例子分別在有處理和無處理情況下的對比，利用固化劑最佳摻入比來設計地基處理方案，並運用非線性有限元方法計算出土體內大小主應力的分佈情況以及變形情況，結果表明本文所得出的配合比方案用於深層攪拌樁法來對福州地區軟粘土進行地基加固時還是比較理想的，這樣不僅充分利用工業廢料，還可節約工程造價。Find the law of the influence from the injection pressure to the filling time and the cavity pressure and make certain of the best filling time, injection time and injection pressure. though the analysis of the flowing velocity and pressure spread of the key position element in the injection parts in different gate position, we forecast the injection parts quality and the possibility injection flaw and its position, optimize the gate position. in this paper, though the research of analogue of the runner system of metal - powder injection molding and the process of injection molding, we get the law of how the injection parameter influence the injection process
在相同的注射條件下，通過分析喂料在不同直徑和長度流道中的流動規律，得到了喂料在流道中的速度場、壓力場和溫度場，找到了流道長徑比的合理取值范圍，並得出通過改變流道設計可實現對現有設備資源充分利用的結論；給出了不同注射壓力下，型腔壓力與充模時間關系曲線和喂料熔體平均充填速度與充模時間關系的曲線，得到了注射壓力對充填時間和型腔壓力的影響規律，確定了最佳的充模時間、注射時間和注射壓力；通過分析採用不同位置澆口注射時注射件關鍵位置單元的流動速度和壓力分佈，預測了注射件的成形質量，或可能產生的注射缺陷及位置，優化了澆口設置。The author makes a mathematics model by viscous hydrodynamics and so on theories of the flowing material a and b on the board, and deduces the formulas of the film thickness and perfusion measure. i also analyze the surface tension of liquid, in order to find out the best technical parameters and to control
作者利用粘性流體力學等理論建立了a 、 b混合料在太陽能電池板上流動的數學模型，從而推導出薄膜的厚度和灌注量的計算公式，並對所形成液面的表面張力進行分析，以找出最佳的技術參數，以便對其進行控制。In view of the fact that there are three types of a hybrid base - bleed - rocket extended - range projectile and they are different from each other in the general structural layout, their structural characteristics and the work performance of the two propellant units is analyzed in this paper
本文針對三種總體結構布局形式不同的底排?火箭復合增程彈，分析了它們的結構特點和底排裝置、火箭裝置的工作特性，詳細討論了復合增程彈底排?火箭工作時序選擇對彈道特性的影響以及實現理論上最佳彈道的匹配條件。For shutters, the results show : 1 ) according to the formula p =, the theoretical value of is calculated by the effective velocity of the flow, and its engineering value is calculated by the arriving velocity of the flow, the relationship between the theoretical value of and its engineering value is 2 ) the smaller value of declining angle will result in the smaller pressure loss and smaller outlet velocities. as a result, the declining angle of 30 擄 or less is recommended in some places which need small wind velocity, such as broadcasting studio and library, and the declining angle of 45 擄 or less is recommended in places which need big wind velocity, such as cinema and office ; 3 ) the larger value of ratio between the wide of the shutter b and the space between two boards h ( b / h ) will result in the larger pressure loss and smaller outlet velocities. the range of b / h from 0. 8 to 2. 0 and the optimum value 1. 2 is recommended ; 4 ) the range of b from 10 mm to 50 nun and the optimum value 40 mm is recommended ; 5 ) the proper thickness of the boards 8 of the shutters is 1. 5 mm ; 6 ) cuneiform boards should replace the rectangle inlet boards of the shutters in order to obtain better ventilation
數值模擬採用fluent軟體，計算結果用excel進行處理，通過對大量數值工況進行數值模擬計算，結果表明：對于單側百葉風口，計算表明： 1 ）對于公式p = （ ~ 2 ） 2 ，的理論計算值中定義為流體流經百葉風口內部時的速度，即有效速度，而工程上常使用流體的來流速度來計算，計算表明，的理論計算值與工程應用值的關系為（ _ （理論） ） （ _ （工程） ） = 0 . 813 ； 2 ）當來流速度一定時，擋板傾斜角度越小，壓力損失越小、出口速度越小；因此在要求進口風速比較小的場所，如播音室、圖書館等，宜採用擋板角度30的百葉風口；在要求進口風速比較大的場所，如電影院、辦公室等，百葉擋板的角度應選45 ； 3 ）當來流速度一定時，百葉擋板的擋板寬度b與擋板間距h的比值b h越大，壓力損失越大，出口速度越小，計算表明，鑒于壓力損失、出口風速、板間形成渦流區的大小，百葉擋板的b h值取0 . 8到2 . 0之間， b h = 1 . 2為最佳值； 4 ）當來流速度一定時，在計算的條件下，當百葉擋板寬度b = 40mm時，百葉擋板的阻力系數最小，考慮到渦流區等的影響，建議選用10mm b 50mm的百葉擋板；西安建築科技大學碩士學位論文5 ）百葉擋板的厚度取為1 . sinln為好; 6 ）百葉擋板的入口側可選用具有傾斜度的楔形擋板來代替矩形擋板，利用其較好的導流作用，可得到更好的出流效果。( 5 ) the definitions, characteristics and all kinds of building algorithms of the voronoi diagram and the delaunay triangle are introduced. their applications in sdm are explored. that the voronoi diagram is an effective method to partition the influence regions between spatial objects and phenomena is put forward, and that the principle of building voronoi diagram is identical to the forming central place is proved
（ 5 ）系統研究了voronoi圖和delaunay三角網的定義、性質及各種建立演算法，並對它們在空間數據挖掘中的應用進行了探索性研究：提出voronoi圖是界定空間目標（現象）的空間影響范圍的一種行之有效的辦法；從理論上論證了voronoi圖的形成與城市中心地的形成是一致的，提出delaunay三角網是建立城鎮網路體系的最佳模型；研究了利用voronoi圖進行公共設施選址優化的演算法及實現。Key technologies are first introduced here such as the phased array antenna theory, dbf ( digital beam forming ) theory and the configuration of transmit and receive ( t / r ) modules. then part of analog circuitry is optimized with the digital technology. cell circular microstrip disk antenna successfully developed based on the theory of microstrip antenna, the four - celled circular microstrip disk antenna arrays are designed, simulated and analyzed with eda tools - hfss, opt1metrics
本文以相控陣雷達組成為主軸，逐一對相控陣雷達關鍵技術中的天線陣原理、數字波束形成（ dbf ）技術和收發（ t r ）組件組成進行詳細的分析，利用數字技術對傳統相控陣雷達設計方案中的模擬電路部分進行改進；在理論設計單元圓形微帶貼片天線單元的基礎上，利用微波模擬軟體hfss和optimetrics對四單元的圓形微帶貼片天線陣進行設計與模擬；對相控陣雷達的幅相監測技術進行理論分析和討論，選擇最佳的幅相監測方案。The design and application of multi - media in classroom instruction has a solid theoretical basis in terms of academic psychology, media - transmission, audio - visual theories, etc. the choice of educational media and teaching resources should be suitable to the teaching objectives and specific groups of students so that it can be reasonable, timely, appropriate, adaptable, systematic and effective. in this way, a new way of teaching chemistry in the secondary school, with its characteristics of being interactive between the teacher and students, of big content capacity, quick classroom tempo and effectiveness, is likely to improve the present teaching situation in china ' s secondary schools
其設計與實施有著特定的學習心理學、傳播理論、視聽理論、系統科學理論等理論基礎，應根據教學目標和教學對象的特點，合理、適時、適量、靈活、有序、有效地使用各種教學媒體及教學資源，形成優化的媒體組合體系，各展所長，相輔相成，充分發揮多種媒體組合的最佳功能，與教師、學生形成多層次互動，以積極的態勢參與教學，努力形成大容量、快節奏、速反饋、高效率的課堂教學基本模式，從而實現課堂教學的最優化。Based on the analysis of failure features, deformation shapes, the failure mechanism of weak - rock roadway is studied systematically. optimal supporting time model of bolt - grouting support is given with different methods when analyzing the bolt - grouting supporting mechanism at large. in order to study bolt - grouting supporting mechanism systematically with simulation method in heavily stressed weak - rock coal and rock roadway of huaibei mine, fem models under different conditions are found by using fem program - ansys. finally, construction technics, grouting parameters, and so forth, are studied and applied in the coal and rock roadway of taoyuan and qinan mines
在對深部高應力軟巖巷道變形破壞特徵、變形破壞形態分析的基礎上，對巷道變形破壞機制進行了較為系統地研究；接著在對錨注支護機理進行了詳盡分析的同時，提出了最佳錨注支護時間（段）的概念，並建立了最佳錨注支護時間模型；以淮北礦區深部高應力軟巖煤、巖巷道為背景，採用大型有限元軟體ansys ，分別建立了不同條件下的數值計算模型對錨注支護進行了較為全面系統的數值模擬研究，得出了一系列有價值的結論。In order to fully develop the theory of squeezed branch piles, in particular, the justification of its superior performance in terms of the bearing capacity and sinking displacement, we have derived the analytical formulas of the axial load and the strain at arbitrary depth ; based on existing static loading test results and research on belled pile, together with the analysis of on - site testing data, we have applied the expand theory on sphere holes to the computation of radial stress of squeezed branch piles under hole expansion ; taking the oil pressure of hole expansion in to account, we have find the a branch force under certain hole pressures, hence we can estimate the maximum bearing capacity of single piles ; we have introduced the experiential formulas for the bearing capacity of squeezed branch piles based on its stress characteristic and pile testing data ; we have also done numerical simulations of squeezed branch piles utilizing finite element method software ansys ; we have matched the simulation res ults with those of on - site basic load experiments, regenerating the distributions of stress fields and strain fields of squeezed branch piles, and from those distributions, we can determine the optimal distances between plates and piles
為了完善支盤樁的設計理論，探求支盤樁高承載力和低沉降量的內涵，本文推導出了支盤樁任意深度的截面荷載以及位移隨深度變化的理論公式；基於已有的靜載試驗成果及有關擴底樁的研究成果，從對現場測試數據的分析，將球形孔擴張理論引入到支盤樁擴孔時徑向應力的計算，考慮到擴孔時的油壓數據，求得某一孔壓下的支盤力，據此估算單樁極限承載力；同時根據對支盤樁的受力特點和試樁數據的分析，提出了支盤樁承載力計算的經驗公式；用有限元分析的方法，利用大型有限元分析軟體ansys對支盤樁進行數值模擬，並將模擬結果同現場的靜載試驗結果進行對比，再現了支盤樁在荷載作用下土中應力場和位移場的變化，根據應力場和位移場的變化范圍，指出最佳盤間距和樁間距；為支盤樁的設計和施工提供了一個可量化的設計依據。分享友人