substitution method 中文意思是什麼

substitution method 解釋
代換法
  • substitution : n. 1. 代，代用，代替，更替，置換。2. 【化學】取代；【數學】代換；代入；【法律】預定繼承人；【語法】詞的代用。adj. -al ,-ary adj.
  • method : n 1 方法，方式；順序。2 （思想、言談上的）條理，規律，秩序。3 【生物學】分類法。4 〈M 〉【戲劇】...
  1. Abstract : methanesulfonic acid method was used to prepare five acylated chitins. except heptanoyl chitin, four of them, i. e. acetyl chitin, propionyl chitin, butyryl chitin and hexanoyl chitin, had high degree of substitution ( from 1. 5 to 2. 0 ) and exhibited lyotropic liquid crystalline behavior and cholesteric phase. as the length of the side chain increased the critical concentration ( w / w ) somewhat increased from 0. 21 to 0. 26 because the chain rigidity dropped. the critical concentration values of all the four derivatives were much higher than that of chitin ( 0. 12 ) due to the decrease of intramolecular hydrogen bonds. the four acylated chitin can form typical banded texture after being sheared. there minimum concentrations to form banded texture of them were evidently different, varied from 0. 25 ( for acetyl chitin ) to 0. 37 ( for hexanoyl chitin ). these results further indicated that liquid crystallinity decreased while the length of flexible side substituents increased

    文摘:四種羧酰化甲殼素即乙酰化、丙酰化、丁酰化和己酰化甲殼素在二氯乙酸溶液中均呈現膽甾型溶致液晶相.臨界濃度隨側基長度增加而略有增加，衍生物的臨界濃度明顯都比原甲殼素高許多，這些規律都可以用鏈剛性的變化來解釋.四種羧酰化甲殼素在剪切時均能形成條帶織構，而且能形成條帶織構的最低濃度有明顯差別，隨側基長度增加而提高，進一步表明側基較長，液晶性減少
  2. The governing equations of the problem are derived in hamiltonian form by using variable substitution and variational principle. then the methods of separation of variables and conjugate symplectic eigenfunction expansion are developed to solve the equations of plate bending problem. the result can be derived by analytical method

    在平面彈性問題中，由變量代換及變分原理，方程可導向哈密頓體系，從而通過分離變量法及共軛辛本徵函數向量展開法，以解析的方法來進行求解。
  3. The azeotropic distillation of the system acetic acid - water - azeotropic agent ( isopropyl acetate and butyl acetate ) is simulated. due to the non - ideal behavior, nrtl - hoc and uniquac - hoc model is used to depict vapor - liquid phase equilibrium behavior of this system. concerning the liquid in the decanter, the stability is checked by tangent plane stability analysis, and the initialization of phase splitting calculation is produced. a good estimate of the phase fration is gotten by successive substitution with newton ' s method, and every component of two phase is gotten by mass equilibrium equation. finally, the solution of this equation is produced with successive substitution calcultion. the naphtali - sandholm method is used to simulation of azeotropic distillation. by virtue of this combined calculation method, the simulation is begun with operational data as basical data. the results of simulation accord with the operating data, which proved that the combined calculation method is credible

    該體系具有高度非理想性，氣液相平衡模型採用nrtl - hoc和uniquac - hoc模型，採用切平面判據法對進入分層器中的液相進行液相穩定性測試，提供液液相分離計算的初值，再結合牛頓拉夫森迭代法運算求得相分割系數，根據物料衡算求出各相組成，循環迭代可求得分層各組分數據，共沸精餾模擬計算採用那夫塔列-山德荷姆全變量迭代演算法。
  4. Research on substitution method of leveling instrument with total station instrument

    全站儀代替水準儀的方法研究
  5. Several deductions from the method of the definite integral by substitution and applications

    定積分換元公式的幾個推論及應用
  6. A calculation model of the coefficient of heat transfer between gas and stave body and inlaid refractory is built based on the substitution method of boundary condition

    摘要基於邊界條件替換方法建立了高爐冷卻壁本體和搗打料與爐氣之間的換熱系數計算模型。
  7. The substitution method of testing the apparent density of the dam body of grouted rubble gravity dams

    漿砌石重力壩壩體容重測試的參考求法
  8. This paper take comprehensive development project - " enrich farmers through water conservancy ( eftwc project ) " in pinggu district, beijing as an example or research area, to built up indexes system for evaluating such projects based on the analysis of the project ' s functions ; to evaluate the effects of eftwc project on the development of agricultural economy in research area with statistic analysis method, such as the theory of gray system and regression analysis method. the key points of this paper are focused on as following aspects : ( 1 ) the value of eco - environmental benefits of eftwc project in pinggu district is evaluated based on utility value theory and environmental economic methods such as equivalent substitution approach, opportunity cost approach, and replacement cost ap proach ; ( 2 ) the economic effects on investment are appraised with both static and dynamic cost - benefit analysis methods ; and ( 3 ) the effects of the eftwc project on the economy and society sustainability in research area are evaluated synthetically from three aspects : society development ability, economy development ability and resources and environmental capacity

    本文以北京市平谷區水利富民綜合開發工程為例，在分析了水利富民綜合開發工程功能的基礎上，建立了水利富民綜合開發工程效益價值評估的指標體系；用灰色系統理論、回歸分析等統計分析方法進行了水利富民綜合開發工程對平谷區農業經濟發展的影響評價；重點以效用價值論為理論依據，用等效替代法、機會成本法和重置成本法（恢復費用法）等環境經濟學方法，對平谷區水利富民綜合開發工程生態環境效益價值進行了評估；採用靜態和動態費用效益分析法進行了水利富民綜合開發工程投資經濟效果分析；最後從社會發展能力、經濟發展能力和資源環境承載能力3個方面進行了水利富民綜合開發工程對平谷區經濟社會可持續發展能力的綜合影響評價。
  9. The paper introduces a new highly - effective synthesis method. decoquinate was synthesized with catechol as starting materials via substitution, reduction, and at last cyclization with " dowtherm a " as solvent

    摘要以鄰苯二酚為原料，通過一系列取代反應，再經過還原、縮合，最後在高沸點的混合有機溶劑中關環。制備的3 -喹啉羧酸乙酯衍生物的總收率為24 . 2 % 。
  10. The steps of design by reuse based on similarity unit substitution and system integration design method based on units are discussed

    提出了基於相似單元置換的設計重用步驟及單元化系統集成設計方法。
  11. On the basis of brief reviewing the progress of the researches about the relative fields at home and abroad, the system of economic sustainable development of huangling county was qualitatively analyzed in the thesis according to the life - cycle theory of products and industries, the theory of export guiding and the theory of economic sustainable development. and the method of systematic dynamics was applied in programming and mockingly regulating the ec onomic sustainable development of huangling, the best model for the economic sustainable development of county regions was discussed. and pointed out that the key to realizing the economic sustainable development of county regions was to suitably adjust the industrial structure, to transform the single structure into the multiple - levels and diversified structure and then to realize the recreation and substitution of advantages by developing coal industry and some non - coal industries such as agriculture and tourism that possess the regional advantages

    本論文在簡要回顧國內外相關領域研究進展的基礎上，依據產業和產品的生命周期理論、出口導向理論和經濟可持續發展理論，對黃陵縣域經濟可持續發展系統進行定性分析，並運用系統動力學方法對其進行規劃與模擬調控，探討了縣域經濟可持續發展的最優模式，指出實現縣域經濟可持續發展的關鍵是適時進行產業結構調整，由單一的結構向多元化、多層次轉變，通過發展煤炭產業和具有區域優勢的農業、旅遊等非煤產業實現優勢再造和優勢替代。
  12. On the basis of displacement - time series of the slope, a nonlinear dynamic model is set up according to backus generalized linear inversion theory in this paper. due to the equivalence beween autonomous gradient system and catastrophe model, a standard cusp catastrophe model can be obtained through variable substitution. the method is used in analysis of displacement data of huangci landslide and wolongsi landslide and in understanding how slopes evolve before sliding. the result shows that the nonlinear dynamic model can make satisfactory prediction result. is it most important that there is a sudden fall of d, which indicates the occurrence of catastrophe ( when d = 0 )

    研究表明，滑坡變形失穩過程具有混沌和分維特性，可以用分形理論來研究滑坡預測問題，基於對任一連續函數，至少在較小的鄰域內可以用多項式任意逼近的數學理論，運用改進的backus廣義線性反演理論，以斜坡位移時間序列為基礎，反演了斜坡演化的非線性動力學模型。並利用自治梯度系統與突變模型的等價性，通過變量代換得到標準的尖點突變模型。
  13. A linear programming method of vector loop used in the analysis of mechanism motion and its error was introduced, the possibility of using the sensitivity of kinematic analysis for error was analyzed, and it was proposed for the error analysis model of the mechanism to make equivalent substitution for the dimensional error with basic kinematic joint element ( kinematic pair ) and as well to implement the linear programming method of vector loop for error analysis within the adams

    摘要介紹機構運動分析與誤差分析的向量環路線性規劃法，分析運用運動分析靈敏度進行誤差分析的可能性，提出在機構誤差分析模型中用基本運動連接元素（運動副）對尺寸誤差進行等價替換，使誤差分析向量環路線性規劃法在adams中實現。
  14. The system of bone age assessment without film is put forward under this backgroud. this system is still based on the standard of estimating skeletal maturity for chinese ( method of chn scoring ), uses the digitized " image substitution tradion x light film

    本文所述的無膠片系統的研製就是在這樣的背景下提出的。本系統仍以中國人骨發育評價標準（ chn積分法）為依據，採用數字化成像替代傳統的x光膠片。
  15. Being the fact that pin switch tends to handle higher power and beam lead pin diode has bad thermo diffuse properties, a power substitution method is proposed to verify pin switch designs

    鑒于pin開關有承受更大的射頻功率傾向和梁式引線pin二極體散熱較差的事實，本文提出了一種替代法進行功率驗證。
  16. Application of variable - substitution method to solving process of higher mathematics

    變量替換法在高等數學解題中的應用
  17. The result showed that, with the equivalent substitution method of kinematic joint for error analysis, its computer - aided analysis was realized and the malady of tedium and complexity with the analysis and computation of the vector loop was eliminated, making the error analysis of the mechanism simple, easy, and reliable

    結果表明，誤差分析的等價運動連接替換法實現了計算機輔助分析，解決了向量環路分析計算量繁瑣的弊端，使機構誤差分析簡易可靠。
  18. The xpdl parse part and the control part of the engine are described in detail. then, change process mechanism of business processes based on the edition substitution method is addressed. finally, the engine of flexible workflow management is realized and is put in practice and plays a special role in the enterprise project

    接著研究了基於「版本替換法」的過程模型變更處理機制。本文最後給出了柔性工作流管理系統引擎的具體實現，並且將其應用於具體的項目中，取得了很好的應用成效。
  19. Proving inequalities by substitution method

    用換元法證明不等式
  20. Substitution method of measurement

    替代測量法
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