mathematical example 中文意思是什麼

Based on the mathematical model developed by the paper, the trim calculations are carried out in the conditions that the example aircraft converts from helicopter to airplane mode in level flight with zero longitudinal acceleration and angular rate

本文依據所建立的樣例機縱向動力學模型，假定飛機在給定高度平飛，縱向加速度和角加速度均為零，完成過渡模式下的動力學配平。

Based on consider hereinbefore, this dissertation discusses several aspects on the problem of the sustainable and optimum exploitation of groundwater resources as follows : ( 1 ) reviewed entirely the origin and evolvement of the concept " sustainable development ", stated and commented the study status in queue on " sustainable development " around national and international range, thorough discussed the science connotation about the concept " sustainable development " ; ( 2 ) looked back and commented across - the aboard some furthest basic concept and proposition related to groundwater resources, put forward self opinions on a few existent mistake points of view and chaos understandings ; ( 3 ) expatiated entirely on the content and meaning of the theory of changeable groundwater resources system, contrast with the traditional methods of groundwater resources calculation and evaluation, combined example to show the application of this theory ; ( 4 ) thorough analyzed the difficult and complexity to forecast the groundwater resources, fully stated the traditional methods of groundwater resources forecasting, pointed out the characteristic and applying condition of these forecasting method, introduced the main ideas and methods of wavelet analysis developed recently, and the matlab software be known as the fifths era computer language, and its accessory wavelet analysis toolbox, applied these methods and tools to analyze the groundwater dynamic curve, adopted the b - j method and morte - carlo method, combined with the theory of changeable groundwater resources system, discussed the new view on the forecast of groundwater resources ; ( 5 ) synthetically analyzed the characteristics and limitations of the present all kind of groundwater manage model, combined mathematical programming mathematical statistics random process and the theory of variation system of groundwater resources on the unite optimum attempter of surface water and groundwater, emphasized how to make the model more nicety, more simple, more practicality ; ( 6 ) analyzed the inside condition and outside condition to assure the sustainable and optimum exploi tation of groundwater resources, the inside conditions are the follows : correct resources idea, scientific methods of resources calculation and evaluation, credible forecast methods of resources, exercisable measures of resources management, the outside conditions are the follows : the development idea of high layer, the transform of manage system, the matched policy and rule of law, the adjusted of economy lever, the improve of cultural diathesis, the boosting up of water - saving consciousness and detail measures, the control of population rising, the prevention and cure of water pollute, the renew and rebuild of ecology ; ( 7 ) scan the sustainable and optimum exploitation of groundwater resources from the high level of metagalaxy, earth system science, and philosophy ; lint out the more directions on groundwater resources

基於以上考慮，論文主要從以下幾方面對地下水資源可持續開發問題進行了比較深入的探討：全面回顧了「可持續發展」概念的由來與演變，對國內外「可持續發展」的研究現狀進行了述評，並對「可持續發展」概念的科學內涵進行了深入探討；對涉及地下水資源的一些最基本的概念和命題進行了全面的回顧和評述，對目前仍然存在的一些錯誤觀點和混亂認識提出了自己的見解；全面闡述了地下水資源變值系統理論的內容和意義，並與傳統的地下水資源計算評價方法進行了對比分析，結合實例具體說明了方法的應用；深入分析了地下水資源預測預報工作的極端重要性和復雜性，對傳統的地下水資源動態預測方法進行了全面的評述，指出了各類預測預報方法的特點及適用條件，對最近二十多年剛發展起來的小波分析技術的主要思想和方法及其應用范圍，以及號稱第五代計算機語言的matlab軟體和附帶的小波分析工具箱進行了介紹，並應用於地下水動態過程線的分析，採用時間序列中的b ? j法，蒙特卡羅方法，與地下水資源變值系統理論相結合，探討了地下水動態資料分析和地下水資源預測預報的新思路；綜合分析了現今各類地下水管理模型的特點及缺陷，將數學規劃、數理統計、隨機過程等與地下水變值系統理論相結合進行地表水地下水或多水源的聯合優化調度，使模型更準確、更實用；對保證地下水資源可持續開發的內部條件和外部條件進行了分析，內部河海人學博卜學位論文前言、摘要、目錄條件主要是正確的資源觀，科學的資源計算與評價方法，可靠的資源預測預報技術，可操作的資源管理措施，外部條件主要是高層發展思路、管理體制的變革、配套的政策法規、經濟杠桿的調節、人文素質的提高、節水意識的增強及具體節水措施、人口增長的控制、水體污染的防治、生態的恢復和重建等;從宇宙科學、地球系統科學及哲學的高度審視地下水資源的可持續開發;指出了地下水資源可持續開發的進一步研究方向。

Carbon monoxide ( co ) is used as a research example. based on the theory and experimental approaches of optical fiber infrared absorption sensing, mathematical model and system design for optical fiber on - line gas measurement are presented

本文選擇一氧化碳（ co ）作為被測對象，詳細研究了基於近紅外吸收的光纖傳感的理論和實驗方法，為氣體的光纖在線檢測提供完善的數學模型和設計系統。

Abstract : the mathematical model that describes the reaction kinetics and molecular weight distribution for the polycondensation reaction process is developed by methods of reaction extent and generation function, in which an industrial process of poly ( ethylene terephthalate ) production is taken as an example. the methods for solving the model are discussed

文摘:以一個工業化聚酯生產過程為例，將反應度法和生成函數作為工具，建立了描述此類縮聚反應過程的反應動力學及其分子量分佈的數學模型，並介紹了求解數學模型的方法。

The fractal is a geometrical figure with self - similar symmetry, and it is an important tool for characterizing irregular structures in nature that are self - similar on certain length scales. for example, the koch curves can be viewed as a mathematical model for coastlines, percolation model can be used to mimic mixture of mental and insulator, self - avoiding walks can serve as a model for linear polymers, and rock fracture mode can stimulate the process of brittle fracture of rock, and so on

分形是具有自相似對稱性的幾何圖形，可用來模擬自然界中在一定尺度范圍內具有自相似對稱性的不規則結構，如koch曲線可用來模擬海岸線，滲流模型可模擬金屬絕緣體混合物，自迴避無規行走模型可模擬線性聚合物，巖裂模型可模擬真實巖體的脆性破裂等。

On the point of system, this paper mainly studies the optimal distribution of load in the machines of irrigation and drainage pumping station, the mathematical model and it ' s solution are studied among the machines in pumping station with two types of axial pump : full regulation or semi - regulation. this paper also studies the problems of the optimal day - operation of pumping station and the economical operation of grading pumping station. at the end, jiangdu pumping station is taken as a practical example to show the theory on economical operation of irrigation and drainage pumping station

本文從系統的觀點出發，以排灌站機組間負荷的優化分配研究為主，分別對全調節和半調節軸流泵兩種泵型的排灌站機組間負荷優化分配的數學模型及其求解方法進行了研究，同時對排灌站最優日運行方式及梯級泵站的經濟運行也進行了初步探索，最後以江都排灌站為例，建立了排灌站經濟運行的實用模型。

( 3 ) planar full - crank five - bar mechanisms without uncertainty singularity are chosen to construct a hybrid mechanism generating the given path. a mathematical model is set up to optimize the dimensions of five - bar mechanism with the minimal power consume of the controlling motor by the improved genetic algorithms. an example is given to show the effectiveness of the mathematical model

（ 3 ）第四章中，選取全曲柄五桿機構中的三種類型機構作為混合驅動機構，以減少用於控制其一連架桿運動的步進電機所消耗的功率為目的，建立相應的數學模型，用改進的遺傳演算法對該五桿機構進行優化綜合，求得尺寸參數。

Applying the data of nationwide land use present investigation and related statistical material, the author analyzes qualitatively and quantitatively the land use difference and its affected factors with a case study. the thesis provides an example for systematically study of land use dynamic change at regional level. based on the rational consideration of land use difference among provinces, several kinds of mathematical approaches are conducted

論文依據全國土地利用現狀調查數據和相關的社會經濟統計資料，運用定性與定量相結合的方法，對中國省區土地利用差異及其影響因素之間開展實證研究，為全面地、系統地研究區域土地利用動態變化提供案例。

For overterm service of unit equipment in thermal plant, taking high temperature compression part ( steam pipe ) for example, the paper introduced a three grade appraisal method and calculated the residual life of high temperature compression part using fixed asset linear method, establised a economic life mathematical mode, finally gave out a general economy appraisal for high temperature compression part with a calculation example

針對火力發電廠機組設備的超期服役，以高溫承壓部件蒸汽管道為例，以其運行工況為基礎，結合材質狀況，逐步實行三級評定，計算高溫承壓部件的剩餘壽命，利用固定資產線性折舊法對設備進行折舊計算，同時建立經濟壽命的數字模型，綜合評定高溫承壓部件的經濟性，並列舉了算例。

Chapter three includes case study of improving mathematical understanding by eliciting student ' s mathematical explanation and an experimental research of improving mathematical understanding by eliciting self - explanations to study worked - example

第三章分別進行了誘導數學解釋，促進數學理解的個案研究和誘導學生通過自我解釋學習樣例，促進學生數學理解的實驗研究

Based on the research and model test, the head loss of flap valves is analyzed by both mathematical physics method and the equation of criterion, and the impulsive force and open angle of flap valve are researched. the flap valve approximate - calculation method is the emphases in this paper. the design methods and using effect of air - filled floating flap valve are studied in the paper by combining with engineering example

在總結前人研究的基礎上，對照試驗結果，通過數理解析和準則方程分析了拍門水頭損失，研究了拍門水流沖力的求解和拍門開啟角度的求解，著重研究分析了拍門近似計算方法，分析拍門在水中的運動規律，並結合工程實例，研究探討充氣浮箱式拍門的配重方法及其使用效果，為今後開拓充氣浮箱式拍門的運用領域作些探討研究。

Each chapter of the paper reads as follows. firstly, the uniform persistence of the system is proved ; secondly, by using the independent subsystem method, the more brief sufficient conditions for the existence and global attractivity of the periodic solution and a mathematical example is obtained to show its practicality. finally, the conditions of the existence of the positive almost periodic solution which is uniformly asymptotically stable are derived by the razumikhin function method and a mathematical example is obtained

在本文中，首先對于這兩類模型，分別考慮各種群的一致持久性；通過對獨立子系統的討論得到了，當系統是周期系統時，周期正解的存在唯一和全局吸引性，當系統是概周期系統時，正概周期解的存在性和一致漸近穩定的條件，並對上述兩種情況分別給出了說明其可行性的數學例子。

Abstract : this paper introduces the mathematical model of deep foundation pit supporting, finally, a case example is given to illustrate the procedure computation ， supportion structure and construction method

文摘:詳細介紹了某廣播電視大廈深基礎支護的數學模型，通過實例說明計算過程、圍護結構和施工方法。

The mathematical formula about the dynamic object standard device used for measurement tracking precision in the factory is thorough researched in this paper, too. the entirety example calculate method used for define the parameter of the complex maths model about the dyamic object standard device is described

本論文還對跟蹤精度室內檢測裝置- - - -動靶標標準裝置的數學模型進行了較深入的研究，並將窮舉法用於確定具有復雜數學模型的動靶標標準裝置基本參數。

This study begins from the farmers " economical bearing capacity of farmers to the burden, sets up the framework of mathematical model, introduces the theory of survival rationality in sociology, judges the psychological expectation and bearing capacity of farmers generally, and confirms a rational burden limit which the farmers can bear economically and agree psychologically. using the case in annul province as an example, the study also analyzes positively the farmers " capability of bearing tax

本研充從農民對負擔的經濟承受能力入手建立數學模型框架進行分析，並引入社會學「生存理性」的理論，對農民的心理預期及承受能力進行綜合判斷，並確定一個現階段農民在經濟上能承受、心理上能認同的合理負擔界限，並以安徽省為例，對農民的負稅能力進行了實證分析。

As far as the system observation for accuracy evaluation of carrier rocket is concerned, there may exist different types of observed data and priors. heterogeneous information means that the different information describing the different characteristics of the same object. since all of the information is relevant to the same object, the fusion is possible. it is a key problem that how to fuse the heterogeneous information to obtain the better evaluation result. therefore, the different heterogeneous information and data is thoroughly studied, moreover, the mathematical description for information fusion of different parameter priors and data is constructed in this paper. based on their relationship between different parameters, indirect prior and observation data is transformed into prior in impact point observation space, which is fused with original prior by weight determined by maximum entropy rule to obtain the mixed posterior distribution. therefore, the test results can be given by combining posterior distribution and impact error observed data. then its application on evaluating guidance systematic error is elaborated as it applies trajectory tracking data, test value of coefficients of guidance instrumentation systematic error, impact point observation data and prior. especially, the advantage of this method lies in its application in case that guidance instrumentation systematic error may not be computed precisely. finally a detailed example on evaluation of carrier rocket is given to verify the theory

為充分利用運載火箭觀測中的不同觀測空間和過程的信息來進行精度評估，針對該背景建立了異質先驗融合的數學描述.研究了飛行試驗中不同觀測空間和過程的異質先驗信息和數據，基於不同觀測過程的解析關系，將間接過程的先驗和觀測數據算出的后驗分佈轉換成落點觀測空間上的先驗，與原落點的先驗進行了最大熵加權融合，得到混合后驗分佈，從而結合落點觀測數據給出評定結果.在無法解算出精確的制導工具誤差系數的情況下，這種方法充分利用了彈道跟蹤數據、工具誤差系數的地面測試先驗值、落點先驗及落點數據，穩健性更好，準確性更高

The non - linear partial differential ( integral ) equation often needs to be solved in the computational hydraulics, however, the mathematical theory of its numerical method has yet not been sufficient at present, for example, the development of some theories such as the strict stability analysis, error estimate and convergence proof has been unable to keep pace with the development of the numerical simulation method

計算水力學中所求解的是非線性偏微分（積分）方程組，其數值方法的現有數學理論尚不夠充分，嚴格的穩定性分析、誤差估計和收斂性證明等理論工作的發展還跟不上數值模擬方法的進展。

Based on a mathematical model which conforms to constraints, and has minimum discounted value of the sum investment and loss - cost in whole planning period, a new binary coding genetic algorithm is presented to solve multi - stage planning problem in this thesis. the method is proved to be efficient by test example

本文分析了多階段電網規劃的思路，基於一個滿足約束條件，並在整個規劃期內所需要的投資費用和運行費用總和的貼現值為最小的數學模型，用遺傳演算法對算例進行了計算，計算中染色體編碼採用了涵括多個時間段的二進制方式，有效地解決了各階段之間的協調問題。

In order to overcome difficulties in the recovery of historical tritium concentration in the determination of shallow groundwater age by the method of mathematical physical model, this paper, just taking the expolatianal model as the example, deduces a new formula to calculate the groundwater age based on the equation of the tritium mathematical physical and the tritium analysis results in different times

摘要為克服應用氚同位素方法確定現代地下水年齡過程中存在的，需確定地下水系統輸入項的歷史背景濃度問題，本文根據地下水同位素數學物理方程，以全混模型為例，利用不同時期地下水同位素的測試結果，通過數學迭代運算，推導出計算現代地下水年齡的計算公式。

Abstract : the mathematical model for the magnetic field numerical calculation is presented with the theory and the method of magnetic field numerical calculation, which combines with the structure characteristics of the 5 - limb core. the program is compiled by fortran language, and an example for the 5 - limb with flat yoke is given. the results prove the correctness of the method and the practical value

文摘:應用電磁場數值計算的理論與方法，結合五柱鐵心的結構特點，推導出磁場數值計算模型，用fortran語言編制出計算程序，並對五柱平軛式鐵心結構進行實例計算，計算結果驗證了分析方法的正確性和實用價值