constraint and variables 中文意思是什麼

constraint and variables 解釋
約束條件與變數
  • constraint : n. 1. 強迫，拘束。2. 約束，壓抑，拘泥。3. 強制力。4. 緊張感[狀態]。
  • and : n. 1. 附加條件。2. 〈常 pl. 〉附加細節。
  • variables : 變量
  1. On the premise of a given set of material parameter, structural boundary shape and condition, design variables - thickness of plate and shell, is designed to minimize the structural weight subjected to the constraint conditions. 1. for the problem with size and stress constraints, full stress design method is used to solve the sectional optimization of plate and shell structures

    在給定了板殼的材料常數、板殼結構的邊界形狀和邊界條件的前提下，確定表徵板殼厚度的設計變量，在滿足約束條件下實現結構重量最小： 1 .對于尺寸和應力約束的問題，使用滿應力方法求解。
  2. Optimal design with three variables is then done to the elbow - bar mechanism of the mp1040b moulding machine by utilizing the method of punishing function for constraint problems and variational scale for unconstraint problems. the optimal target function is the maxium of gradient in one work travel for the moulding plank of the elbow - bar mechanism. the result shows that the maximal gradient of moulding plank in one motion period declines by 25. 7 after optimization, and the angular acceleration of the bottom moulding plank decreases greatly

    動力學分析中，各構件的質量和轉動慣量是通過pro / engineer軟體，先建立各個構件幾何模型而求得；然後，利用解決約束問題的罰函數法和處理無約束問題的變尺度法對mp1040b型模切機肘桿機構進行三個設計變量的優化設計，優化目標函數為肘桿機構的下模切板在一個工作行程中達到的最大傾斜程度；通過優化設計，模切機肘桿機構的下模切板在一個工作行程中的最大傾斜程度降低了25 . 7 ，其角加速度明顯減小，提高了模切機動力學性能。
  3. Based on the variables of inlet length, compression ratio, inlet opening phase and the exhaust closing phase, multi - objective optimization was conducted for power, torque, combustion noise and fuel consumption indicators with constraint conditions of fuel consumption rate and the maximum breakout pressure

    以進氣道長度、壓縮比、進氣開啟相位、排氣關閉相位為可變因素；以比油耗、最高爆發壓力為約束條件，針對滿足功率、扭矩、燃燒噪聲和油耗指標進行多目標優化設計。
  4. A full mathematical model of optimal flow pattern design withengineering constraints was put forward, based on modern optimal control theory. an optimal flow pattern design was presented for optimizing meridional channel of axial flow turbine. according to integral optimization of turbine stages, a full physical model and mathematical expression were put forward for proposition of optimal flow pattern, including all performance parameters in turbine stages. this problem was further recast into a typical form control to maximize specific performance index such as work or efficiency of stage with given initial state, fixed terminal condition and constraints for part of state terminal variables. the program was also worked out according penalty function method and conjugate gradient method. the optimal distribution of c1ur1 ( r1 ) was obtained according to constraint conditions and maximized objective function

    把近代最優控制論方法引入軸流透平葉片的設計，在優化的軸流透平子午通道內，建立包括透平級內所有性能參量的最優流型命題的完整的物理模型及其數學表達式，並歸化為一個在給定初始狀態、自變量終端固定、部分狀態變量終端受有約束的條件下，使級的某一性能指標（如級的功率）達到最優的最優控制問題，應用「代價函數法」及「共軛梯度法」編制計算程序，計算得到符合給定約束條件、並使目標函數取極值的最優環量分佈，結果是令人滿意的。
  5. In this dissertation, with the aid of many types of constructive transformations and symbolic computation, some topics in nonlinear waves and integrable system are studied, including exact solutions, painleve integrability, backlund transformation, darboux transformation, symmetry ( similarity reduction ), conditional symmetry, lax integrable hierarchy, liouville integrable n - hamilton structure, constraint flow, involutive system, lax representation, r - matrix, separation of variables and integrable couplings. chapter 2 and 3 are devoted to investigating exact solutions of nonlinear wave equations : firstly, the basic theories of c - d pair and c - d integrable system are presented

    本文以構造性的變換及符號計算為工具，來研究非線性波和可積系統中的一些問題：精確解（如孤子解、周期解、有理解、 dromion解及compacton解等） 、 panileve可積性、 backlund變換、 darboux變換、對稱（相似約化） 、條件對稱、 lax可積族、 liouville可積的n - hamilton結構、約束流、對合系統、 lax表示、 r -矩陣、變量分離及可積的耦合系統
  6. 2. for the problem with size, stress and displacement constraints, the stress constraint is transformed into movable lower bounds of sizes, the displacement constraint is transformed into an approximate function which explicitly includes design variables by using mohr integral theory. a mathematical programming model of the optimization problem is set up. the dual programming of the model is approached into a quadratic programming model

    2 .對于尺寸、應力和位移約束的問題，將應力約束化為動態下限，用單位虛荷載方法將位移約束近似顯式化，構造優化問題的數學規劃模型，將其對偶規劃處理為二次規劃問題，採用lemke演算法進行求解，得到滿足尺寸、應力和位移約束條件的截面最優解。
  7. According to the design theory of the cable - stayed bridge and to the feature of the cantilever construction the authors propose a construction control method called optimum completion state method ( ocsm ) for rc cable - stayed bridges in the proposed method, the optimum completion state is regarded as the final target of the construction control, and the optimum construction state at each construction stage is taken as the technical route the key of the method is to properly choose or adjust the cable forces the objectives function of optimization is to minimize the elevation error of the girder under the constraint condition that the internal forces ( bending moments ) of the girder are bounded the optimization variables are the cable forces on the basis of the above principles, a optimum model for a construction step is established and cable force adjustments can be found for each construction step in this model, the creep and shrinkage effects of concrete have been considered a bridge example is given which shows that the final state of the bridge is very close to the design aim and that this method is much better than the so - called double - control method the example is a good illustration of the soundness and practical value of the proposed method

    根據現代斜拉橋結構設計理論和懸臂施工方法的特點，提出了以最佳成橋狀態作為施工控制的最終目標，以實施最佳施工階段為技術路線，以索力調整為核心內容的斜拉橋施工控制理論，簡稱為最佳成橋狀態法；以斜拉橋主梁標高誤差最小為目標函數，以主梁內力（彎矩）為約束條件，以索力為優化變量，建立了最佳施工階段的索力調整計算模型；推導了考慮徐變收縮效應的索力調整計算公式；用最佳成橋狀態法對一實橋工程進行了施工控制全過程計算研究，得到的成橋狀態與設計目標相當接近，優于該橋以「雙控」為控制目標的實測結果，有力地證明了本文方法的正確性及其工程實際價值
  8. The over - constrained and under - constrained problem can be solved naturally in our approach because that a constraint problem is transformed into an optimal problem does n ' t entail that the number of constraint equations equal to the one of constraint variables

    由於將約束問題首先轉化為優化問題的過程中，並沒有要求約束變量的數目與約束的數目相等，因此可以自然地求解欠約束問題和過約束問題。
  9. The tu ' s scheme is extended to the generalized dirac spectral problem with an arbitrary function, the generalized kaup - newell spectral problem and the new 3x3 spectral problem with five potentials such that their lax integrabie integrabie hierarchies of equations and liouville integrabie hamilton structures are obtained. chapter 7 is devote to higher - order constraint flow, involutive system, lax representation, r - matrix and the separation of variables

    第六章研究了lax可積的新的方程族和liouville可積的n - hamilton結構方面的問題：將屠格式推廣到新的含有任意函數的廣義dirac族的譜問題、廣義kaup - newell譜問題及含有五個位勢函數的3 3譜問題，研究了它們的lax可積的方程族和liouville可積的hamilton結構。
  10. On the premise of satisfying all constraint conditions stipulated in the codes with the pipe thickness spacing, height and thickness of stiffener rings as variables and the total steel quantity per meter of pipe as objective function, the program is developed for structural stress computation and comparison of total steel quantity used so as to select the alternative with smallest total steel quantity per meter of pipe

    該程序在滿足規范規定的各種約束條件下，以管壁厚度、加勁環間距、高度和厚度等作為變量，以每米鋼管的總用鋼量為目標函數，進行結構應力計算和工程量比較，從中選出用鋼量相對最小的設計方案。
  11. The obstacles ifl deriving system of constraints aie how to analyze and reduce the state - ment components and data types of variables on w, and derive system of con8traints as concise as possibie. and the primary obstacle in solving system of constraints is how to process the nonlinear constraint ( s ) among them

    建立約束系統的困難是分析、化簡路徑w上的各種語句成分和各種數據類型，建立盡可能簡潔的約束系統；求解約束系統的主要困難是處理可能存在的非線性約束。
  12. The objective function is the cost of anti - slide pile " s per meter ; the constraint conditions are the strength of anti - slide pile " s normal section and inclined section, the ratio of reinforcing design and the size of section in the design code ; the design variables are the height of section, the area of reinforcement and the amount of hoop. and the optimization model is solved by 0. 618 method

    本文提出的優化設計方法，以樁單位長度的總造價為目標函數，以規范對單筋梁的正、斜截面強度，配筋率及截面尺寸等要求為約束條件，以樁截面高度，抗彎縱筋面積，抗剪箍筋數量等為設計變量，來建立優化模型，並用0 . 618法進行求解。
  13. An optimization process of a thin - walled structure was performed by the response surface method, which took the maximum absorption energy from an impacting process as objective, the properties of the thin - walled structure as variables, and the impacting axial force as constraint

    摘要運用響應面法，以碰撞吸收能量最大為目標，薄壁結構幾何尺寸為設計變量，碰撞作用力為約束，對薄壁結構進行結構優化。
  14. The optimal model of truss structure is established, in which the cross sectional areas of bar are taken as design variables, the structure weight is taken as objective function. in the process, the reliability of structural displacement and bar stress and the fundamental frequency are taken as constraint functions. from the engineering practice, all the reliability constraints, which are implicit generally with the design variables, are equalized and transferred to the conventional explicit constraints

    本文將主要考慮桁架結構的優化問題，首先建立數學模型，即以桁架的橫截面積為設計變量、以重量最小為優化目標，位移、應力等可靠性及基頻為約束條件；最後，從工程實際出發，對結構系統的可靠性隱形約束進行等價顯化處理，使之轉化為常規的橫截面積優化問題。
  15. Secondly, a non - linear mapping function from multiple inputs ( design variables ) to output ( maximum dynamic stress ) is constructed within bp neural networks, in order to obtain the constraint function values that are necessary in optimum design of structures using genetic algorithms and get the optimum solutions. the generation ability of the bp network after training can be used to replace the calculation of fem, which makes the constrained optimization to be possible

    其次，由於動應力的有限元法計算過程復雜，計算量巨大，在應用優化演算法時，需要反復計算，為了使優化過程可行，設計了bp神經網路，利用有限元計算的樣本數據建立起結構設計參數（輸入）與動應力（輸出）的非線性映射關系，從而代替有限元法，快速計算結構動應力。
  16. Based on the constraints of the one - time start up of pumping station, a optimal model established by taking both the start up time and the shut down time as the optimized variables is presented herein ; by which the modeling variables are less and the constraint conditions of the one - time water pumping can be satisfied, and then the constraint processing of the variables are simplified as well

    針對泵站中一次性開機的約束條件，提出了以運行起始時刻和運行結束時刻作為優化變量的優化模型，該模型變量少且自然滿足一次性引水約束條件，簡化了約束處理。
  17. The solution existence for dynamic topology optimization of truss is explored from the engineering point of views : when the design variables ( section areas ) are continuous and their bound are not imposed, if there is no frequency constraint, the optimal solution always exists for a given optimization problem and contrarily, when the frequency constraint is considered, the frequency will become the key constraint and also the solution existence will be changed by the topology alteration

    從一般工程意義上探討了桁架結構動力學拓撲優化設計解的存在性：無固頻約束時，設計變量連續且不考慮上限約束，則優化問題總是有解；考慮固頻約束時，頻率約束是是否有解的關鍵約束，並且改變結構拓撲形狀可以改變解的存在性。
  18. A path - wise test data generation framework is proposed in this thesis, whose fundamental algorithm is the improved method. this framework adopts a constraint solver using linear programming and linear ( mixed ) integer programming methods for w on which all of the predicate functions with respect to the input variables are linear. for w on which there is nonlinear function ( s ) with respect to the input variables

    該框架以改進后的迭代鬆弛法為核心演算法，對于謂詞函數均為輸入變量的線性函數的程序路徑，採用基於線性規劃、線性（混合）整數規劃的約束求解器；對于謂詞函數中含有輸入變量的非線性函數的程序路徑，採用線性規劃、線性（混合）整數規劃和最小二乘解法相結合的約束求解器。
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