mathematical law 中文意思是什麼

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。

In this paper, starting from the basic law of fluid me chanics, a mathematical model equation for describing the tran sient flow of the wet gas in the pipeline under peak shaving op eration is established, a simplified treatment for the model equa tion is made and a train of thought for concrete calculation is de signed

文章從流體力學的基本規律出發，建立了描述濕天然氣管道輸送調峰工況下瞬變流的數學模型方程，並對模型方程作了簡化處理，設計了具體的計算思路。

Aiming at the problem that the seeds picked up by the suction plate of the seed metering device cannot accurately fall into the seed pit opener as well as into the seed pit, an innovated seed metering device on which the seed dropping angle can be adjusted within a certain range and a new testing stand have been developed in accordance with the mathematical calculation model that had " in accordance with the mathematical calculation model that had been established previously. then an experimental study is conducted and the seed dropping law has been found out through the study

本論文根據2bqm - 2型氣吸式精量鋪膜播種機的結構和工作原理，針對該機在實際播種中，吸種盤吸出的種子不能滿足準確地落入在膜上滾動開穴的鴨嘴內，並及時地排入到鴨嘴所成的穴孔內的設計要求，進行了一定的試驗研究，利用已建立的計算數學模型，設計新的試驗臺，改進排種器，使排種器的落種角度可以在一定的范圍內調整。

Based on the results of experiments, the process of biomass accumulation and soil water consumption of alfalfa has been simulated with mathematical statistical method, so as to find the character of its accumulated biomass and the law of soil water utilization

摘要通過種植試驗分析，用數理統計方法模擬了紫花苜蓿生物量累積過程及土壤水分消耗過程，揭示了紫花苜蓿的生物量累積特點及其土壤水分利用規律。

Based on the count of failure in the samplers, this paper analyzes the weak link of the quality of domestic automobile products. with the help of mathematical statistics and automobile reliability theory, we get the failure law of bus, truck and car of the domestic automobile industry and their failure distribution function, reliability function, probability density function, and failure rate function. accordingly, the present situation of reliability in domestic automobile products is expounded

本文通過對樣車的故障進行統計，分析了我國汽車產品質量的薄弱環節，並藉助數理統計手段和汽車可靠性理論，得出了國產客車、載貨汽車以及轎車的故障規律和相應的故障分佈函數、可靠度函數、故障密度函數及故障率函數，論述了國產汽車產品的可靠性現狀。

Having proceeded from analyzing the bore wearing and erosion by application of the new method, the mathematical model of simulating the law of the bore wearing as well as that of the relationship between the law of the bore wearing and the muzzle velocity reduction have been established

新方法從分析炮膛磨損燒蝕入手，建立了模擬炮膛磨損規律的數學模型和炮膛磨損規律與火炮初速減退量關系的數學模型。

A mathematical model for the particles layering growth is developed based on the mechanism of layering growth and law of conservation of mass. a formula for calculating the particle diameter was also deduced

依據顆粒層式成長機理，根據物質守恆原理建立了顆粒層式生長的數學模型，提出了粒徑長大的計算式。

The design of ride control system is a typical project of system integration, the contents of the first year ' s research include mathematical model, control law, computer software / hardware, man / machine interface, control circuit, hydraulic power system and transmission mechanism design, a prototype had also been built to verify the stability and performance of the system

本計畫將以船舶運動控制系統商品化為目標，研究控制器軟硬體系統之簡化，提升控制器硬體系統訊號傳輸之品質及側向穩定翼之機構設計，最後並期對運動控制器軟硬體分項功能與整體機構功能作驗證。

Abstract : the effect factors of grinding roller surface roughness areanalyzed and experimented. the law of effect factors such as roller rotary speed, grinding wheel granularity, grinding liquid and so on, about roller surface roughness is obtained. the mathematical model of roughness is established through regression

文摘:對影響磨削輥面粗糙度的因素進行了系統分析和實驗研究，得出了軋輥轉速、砂輪速度、砂輪粒度、磨削液等因素對磨削輥面粗糙度影響的一般規律，利用回歸分析的方法建立了粗糙度的數學模型。

Walter s. sutton proposed that chromosomes were the site of mendel ' s hereditary factors. the hardy - weinberg law established the mathematical basis for studying heredity in populations

薩頓提出染色體就是孟德爾的遺傳因子所在地。哈代魏因貝格二氏定律建立了研究種群遺傳的數學基礎。

The mathematical model of diesel - generator set in the mechano - electronic transient process is proposed in this paper, the pulsation and delay of diesel torque are analyzed, the relation between diesel torque and diesel rotational speed together with injection pump rack bar displacement is described exactly. the motion law of diesel - generator set is revealed all - sidedly and nonlinear problem of diesel - generator set is settled by piecewise linearzation method

本文提出了柴油發電機組機電暫態過程的數學模型，分析了柴油機轉矩的脈動和滯后，準確地描述了柴油機輸出軸扭矩與柴油機轉速和噴油泵齒桿位移之間的關系，全面揭示了柴油發電機組的運動規律，利用分段線性化的方法解決了柴油發電機組的非線性問題。

By means of establishing the mathematical model and simulative model for double wishbone typed independent suspension frame of certain light - duty lorry and using the adams software to simulate the variation law of front restraint angle of wheel at different positions of splitting points during the moving course of lorry, and verified the correctness and reliability of the simulated result by applying the spatial analytic geometric relation formulae

摘要通過建立某輕型卡車雙橫臂式獨立懸架的數學模型和模擬模型，利用adams軟體模擬汽車運動過程中不同斷開點位置車輪前束角的變化規律，並用空間解析幾何關系式驗證了模擬結果的正確性與可靠性。

In order to increase the accuracy and the widely use of fire spreading model, the paper base on the change state of temperature of the calculus on fire area, use the law of energy conservation, it can give the change of the temperature field ' s mathematical model on the fire area

摘要為了提高林火蔓延模型的準確性和通用性，文中把火場看作一個動態溫度場，並從火場上任一微元體任一時刻溫度變化狀態出發，應用能量守恆定律，建立火災區域溫度場動態變化模型。

In this article, constituting some the equations which reflect the flow law and building and applying many mathematical models of physical and chemical reactions in the the plasma ignition : applying k - two equations turbulence model to calculate the turbulence parameter supplying simplied reaction systerm model and applying eddy break - up model and p - i thermal radiation model. with these reasonable simplied modles, numerically simulating the flow field in the plasma ignition. during the numerical simulation, applying the body - fitted coordinates for the complex geometry of the computional field ; using the mixing format to disperse the equations ; applying simplec algorithm method to solve the equations ; using above models and methods, it can get flow field distribution ; including temperature, pressure, turbulent kinetic energy and its dissipation rate, turbulent viscosity, velocity, density. these results are significant to design and improve the plasma ignition

本文旨在通過構造反映等離子點火器內部流動規律的基本方程組，建立描述等離子點火器內部的復雜物理化學過程機制數學模型：模擬等離子發生器內部燃燒的-雙方程湍流流動模型；模擬氣體燃料在燃燒時中化學反應的簡單化學反應系統模型；模擬等離子點火器內部湍流預混燃燒的漩渦破碎模型；模擬等離子點火器高溫燃氣及其壁面的p - i輻射換熱的模型等等，對模型進行一定的合理的簡化，然後數值模擬等離子點火器內部流場的流動。

On the basis of solid - liquid coupling theory and the gas absorption law under different temperatures, the mathematical model of gas flow under unequal temperatures and its numerical solution are obtained

根據瓦斯的吸附解吸規律和煤與瓦斯固流耦合作用的機理，建立了非等溫條件下瓦斯流動的數學模型，並給出用有限元求其數值解的方法及程序。

Abstract : according to working characteristics of the mechanical construction system of cement concrete pavement, this paper presents the mathematical model of this system by applying the theory of stochastic service system to describe the motion law of the mechanical construction system

文摘:根據高等級公路水泥砼路面機械化施工工藝，利用隨機服務系統理論，提出了水泥砼路面機械化施工系統的數學模型，動態地描述了水泥砼路面機械化施工系統機械運行的一般規律

From the standpoint of theory, market behavior is tied to a mathematical law, but it is just not the same type of law found in the physical sciences

從理論的角度講，市場行為遵循一個數學定律，但這與自然科學中發現的定律又不一樣。

Mathematical facts worthy of being studied are those which, by their analogy with other facts, are capable of leading us to the knowledge of a mathematical law, in the same way that experimental facts lead us to the knowledge of a physical law

值得研究的數學事實是因它們與其它的事實相類似，能夠引導我們去認識數學定律，正如實驗事實引導我們去認識物理定律一樣。

The mathematical mod els based on the assumed modes method and a dosed loop velocity feed back control law are developed to describe the fiexural vibration dynamic behaviors

引入速度負反饋形成閉環控制，對被動控制和主被動控制的控制效果進行了分析比較。

The limit of future predictions based on exact mathematical law is only restricted by lack of knowledge of correct data on past history to work from

建立在精確的數學法則基礎上的預測，對未來預測的深度廣度，將受到認知缺陷以及缺乏所需的正確歷史數據的限制。