數學例題 的英文怎麼說
中文拼音 [shǔxuélìtí]
數學例題
英文
mathematical example-
The double - base teaching is one of traditional features in the mathematics " education in our country, which focuses on how to cultivate the students " inquiry ability in the daily teaching. first of all, from the beginning of the double - base teaching, we pay attention to the original knowledge during the teaching of concepts, definitions, theorems and formulas. in the case of exercising lessons, we conclude, summarize and train the student ' s emanative ideations
重視雙基教學是我國中學數學教學的傳統特色，在日常教學中培養學生的探究能力，應首先從雙基教學開始：在概念、定義、定理、公式的教學中注重知識的起源；在例習題教學中，注重歸納、小結及訓練學生的發散思維能力；在復習課的教學中注重各知識的相互聯系；其次，由於數學開放題具有良好的探究功能，因此，在日常教學中適當創設數學開放題，也是培養學生探究能力的一個重要途徑。Abstract : the mechanical analysis for arch bridge with flat hinge joints is a mechanical problem with non - linear boundary. mechanical analysis of methods at present is not clear, which can not calculate the arch bridge with changeable section and section with complicate shape. in this paper, the new method used to get the section resistance coefficient k is presented, the iterative procedure is established to calculate the internal forces of arch bridge with flat hinge joints, and the computational example is given. the method can apply to the arch bridge with any numbers of flat hinge joints and any shape section
文摘:平鉸拱橋結構的受力分析屬于邊界非線性力學問題，目前的一些方法受力分析不太明確，對變截面、復雜形狀截面等平鉸拱橋無法進行計算.針對這種情況，提出了確定平鉸截面抗力系數k的新方法，建立了計算平鉸拱橋內力的迭代演算法，並進行了實例計算，研究結果表明，這一方法對具有任意個平鉸、任意形狀截面的拱橋結構是適用的This paper studies the integration of advanced mathematics and language of computer, an example hyperboloid of one sheet is given
摘要以二次曲面為例，探討了計算機語言與高等數學教學的整合問題，並給出了一個單葉雙曲面的應用程序編寫實例。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。This paper sets up a fuzzy optimum math - model of the prestressed degree for prestressing bundle disposition of prestressed concrete continuous beam bridges, which is transformed into a clear math program by - level cut - set. by the solution of the clear math program, a succession of reasonable prestressing moments can be obtained. then it is convenient to dispose the prestressing system by only taking account of geometric factors of all controlling sections. based on this, a theory of automatic disposition of the prestressing bundles is proposed and an engineering example is given to demonstrate it
建立預應力混凝土連續梁橋預應力度的模糊優化問題，按-水平截集解法，將模糊優化問題轉化為確定性的數學規劃問題.求得一較合理的消壓彎矩后，只需按控制截面的構造進行預應力體系設計.在此基礎上提出了配束自動化的基本思想，並以一實例說明其理論應用Abstract : this paper sets up a fuzzy optimum math - model of the prestressed degree for prestressing bundle disposition of prestressed concrete continuous beam bridges, which is transformed into a clear math program by - level cut - set. by the solution of the clear math program, a succession of reasonable prestressing moments can be obtained. then it is convenient to dispose the prestressing system by only taking account of geometric factors of all controlling sections. based on this, a theory of automatic disposition of the prestressing bundles is proposed and an engineering example is given to demonstrate it
文摘:建立預應力混凝土連續梁橋預應力度的模糊優化問題，按-水平截集解法，將模糊優化問題轉化為確定性的數學規劃問題.求得一較合理的消壓彎矩后，只需按控制截面的構造進行預應力體系設計.在此基礎上提出了配束自動化的基本思想，並以一實例說明其理論應用Teach yourself electricity and electronics offers easy - to - follow lessons in electricity and electronics fundamentals and applications from a master teacher, with minimal math, plenty of illustrations and practical examples, and test - yourself questions that make learning go more quickly
教你電力和電子提供易用到后續的教訓，在電力和電子基本面和申請碩士學位的教師，極少數學，大量的插圖和實例，並考驗自己動手問題，使學習到更迅速。Then, according to the current situation of mathematics teaching, it advances four principle of the approach ( the principle of simplifying forms and emphasizing practical results ; the principle of creating settings and studying initiatively ; the principle of stressing the process and encouraging the exploring ; the principle of connecting with the reality and stressing the practice ). next, according to these teaching principles, it designs the class teaching frame of the approach, as follows : creating the right settings of the problems - presenting the basical teaching problems - solving the basical teaching problems - demonsting the examples - feedback and evaluation
提出了「問題解決」教學的四原則（淡化形式，注重實效的原則；創設情景，主動學習的原則；突出過程，激勵探索的原則；聯系實際，注重實踐的原則） ，並根據教學原則，設計了「問題解決」教學的課堂教學結構：創設合適的問題情景? ?提出基本的數學問題? ?解決基本的數學問題? ?例題示範? ?反饋評定。The numerical algorithm of solving the adjoint equations for different design cases have been developed by using finite volume methodology which is usually used to solve the flow governed equation. it includes the some important aspects, such as flux formulation, wall and far - field boundary treatment methodology, dissipative term formulation, etc. after the solution of the adjoint equations is obtained, the derivatives of the cost function with respect to all the design variables can be evaluated with the same operation. this can yields a significant saving over the other gradient - based techniques when there are many design variables
（ 3 ）進行了應用控制理論和三維歐拉方程的機翼氣動反設計研究，以及有升力約束情形下機翼跨音速減阻問題研究，分別推導了相應的共軛方程及邊界條件數學表達形式，研究與發展了三維共軛方程的有限體積數值求解方法，及相應梯度公式的數值求解方法，通過對計算網格生成、流場計算、共軛方程數值求解、梯度求解和優化演算法等多方面的有效結合，成功發展了三維機翼的氣動反設計和跨音速減阻優化設計程序，成功地進行了多個設計算例研究。How to solve the questions of mathematics physics with green function method is clarified with several examples
結合具體實例，說明如何用green函數方法解決數學物理問題了。This study run through the basic idea of ecoregional approach methodology and systematic design by integrating agronomy, ecology, environmental economics, resource economics and maths. the study methods included macro - and micro - analysis, qualitative and quantitative analysis, theoretical and case study, statistical analysis and model simulation and so on. resources shortage and environmental pollution casued by intensive agriculture were examined for a specific suburban area shunyi district beijingissues were systematically analyzed including landuse changes, landuse driving force, water - limited yield simulation with wofost model, ecological, environmental and economical analysis of landuse, as well as optimizing pattern of landuse with rcsadss model
本研究立足於生態區域法的基本思路，採用系統設計的思想，通過農學、生態學、環境經濟學、資源經濟學、數學等多學科的交叉與融合，宏觀與微觀、定性與定量、理論與實證研究等相結合的方法，運用統計分析、模型模擬等技術手段，在大量調研基礎上，針對目前大城市郊區農業用地中存在資源短缺、環境污染等問題，以北京市順義區為典例，從土地利用現狀與動態、驅動力、 wofost模型產量模擬、生態環境經濟分析及種植業結構優化模式等方面進行了系統研究，獲得如下研究結果： （ 1 ） 2002年順義區的土地利用仍以農業用地為主，耕地、園地、林地和牧草地之和占總土地面積的56 ，農用地中糧食作物仍佔43 。Comparing and analyzing the synchronous control strategy, which brings up the new method to control the double un - symmetry jars proceed synchronously with the combination of proportional valve and servo valve, which forms closed loop control ; basing on the above methods, models are made to get mathematics models of position control system and to analyze system model theoretically by using pid controller, we can realize regulating parameters, minimizing synchronous errors and enhancing the dynamic performances ; the simulink tool box in matlab software is used to imitate the system according to the model, which not only makes the result visual and easy to adjust the parameters in interactive way but also lets us understand the effects of different parameters and optimizes the dynamic properties. the theory of plc control in dshp is discussed after advanced understanding of the system movements. hardware design and general regulation are given on the base of siemens company products s7 - 200 plc
本文根據大量的國內外文獻，對研配液壓機的工作原理及設計結構進行了簡介；對位置同步的控制方法進行了比較分析，提出比例閥和伺服閥復合控制的閉環結構來對非對稱雙缸進行同步控制電液比例同步控制方案；在此基礎上著重對比例閥控非對稱缸建模，最後得到位置控制系統的總體數學模型，從理論上對同步系統動態特性進行了分析，並用pid控制器進行參數整定，減小雙缸同步誤差、提高系統的動態響應性能；其中控制性能的分析藉助于matlab軟體中的simulink工具箱，由已建立的數學模型形成模擬模型，得到可視化的模擬結果，從而利於交互方式下調整參數，了解不同的參數對系統的影響，優化同步系統的動態性能；在深入了解系統的動作特性后，對plc控制研配液壓機的原理進行了探討，針對siemens公司s7 ? 200型plc給出了硬體設計的總體規劃，編制出研配液壓機動作控製程序，在編程中著重研究位移傳感器與plc的通訊、雙缸同步運行的pid控制在plc上的實現及bcd碼撥盤輸入程序的植入問題。Function of examples of higher mathematics teaching
高等數學教學中例題的作用The research presented in this thesis was a sub - project of the national high technology research and development program of china ( no. 2004aa424530 ) on case - based industrial design ( cbid ) system. the procedural knowledge retrieve in case - based nc machine tools form design system is the focus of the research. with the analysis of the theory, a cognitive experiment with the method of protocol analysis was conducted to capture and identify the procedural knowledge and design problem domain, and the model of procedural knowledge search is proposed with the concept of membership from fuzzy theory
本文是「 863 」國家科技攻關項目「基於案例的工業設計技術（ casebasedindustrialdesigncbid ）和輔助設計應用系統研究」的研究子課題之一，文章研究重點為系統中數控機床工業設計中程序型知識檢索，通過理論分析和實驗研究，探討其在cbid系統中的實際應用模式，最後引入模糊數學中隸屬度的概念，探討了其在系統中的實現方式。The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either
在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。The present utilization and existing problems in water resource of the north of huaihe river in anhui are introduced. based on such research objects as northern guo river of bozhou, jiangtang of fuyang and key city zones, a mathematical model with systems engineering viewpoint is established and used to investigate in water resource problems in the area. the main contents are as following : ( 1 ) groundwater resource and present utilization ; ( 2 ) mensuration of calculational parameters of groundwater and calculational methods ; ( 3 ) economic parameters of irrigation areas ; ( 4 ) establishing northern wo river forecast model with finite element method, areal well - group method and water balance method ; ( 5 ) establishing optimal water resource allocating model for northern jiangtang and new cihuaixin river irrigation area and investigating in the combination of surface water and groundwater, optimal agricultural planting - mode and optimal distribution proportion of various water sources ; ( 6 ) some existing exploitation problems and advices about water resource in the area
本論文針對淮北地區水資源開發利用現狀及存在問題，以安徽亳州渦河以北地區、阜陽姜堂鄉和重點城市區為研究對象，運用系統工程觀點，採用數學模型方法，對該區水資源問題進行了綜合研究，主要內容為： （ 1 ）地下水資源及開發利用現狀； （ 2 ）地下水計算參數測定和計算方法； （ 3 ）灌區經濟參數； （ 4 ）採用有限單元法、面狀井系法、水均衡法，建立亳州渦河以北地下水位預測模型； （ 5 ）建立阜陽姜堂及茨淮新河北部的農灌區水資源優化配置模型，應用系統分析的方法，研究地表水與地下水聯合運用，農業最優種植模式及各種水源的最佳分配比例； （ 6 ）淮北地區水資源開發利用存在問題及建議。Making logistics in reason rests with making transport in reason in most extent. in view of three ration require, that is, long distance transport between one producing area and one customer, ration between one logistics center and multiple customers, ration among multiple producing areas, multiple logistics centers and multiple customers, this paper carry out synthetic analysis and discuss according to theory related operational research such as dynamic programming, chart theory and network analysis, transport problem of liner programming. many factors influence the selection of regional logistics center allocation
影響區域物流中心選址的因素較多，論文根據模糊數學理論，對多因素決策問題提出用貼近度的方法比較被選地址與理想目標的接近程度，用層次分析法確定各評價指標的權重，與隸屬函數綜合成隸屬度，並用實例說明該方法的有效性。同其他方法相比較，綜合分析法可操作性更強。It takes me two hours to work out the maths problems every day
例：我每天要花兩個小時解數學題。Teachers in the past put much time and many efforts in the * so - called " exercises sea tactics ", but students still can not achieve good ideation as well as the examination results., in the recent years, thanks to the recognition of the agile and integrative application of the basic knowledge as the college entrance examination focuses closely on the general outline of the texts, teachers hence have an opportunity to pay much attention to working over the texts, laying solid foundation and fostering ability for the students. this article describes, through teaching practice, mainly on how to " press close to the texts while insist on necessary versatility ", it includes : 1. design the scene of the question so as to introduce the topic, emphasis on the knowledge process
這篇文章主要通過一些教學實踐談談如何「貼近課本，有所變通」 ，主要從如下幾個方面進行闡述： （ 1 ）設計問題情境引入課題，注重展示知識的形成過程（ 2 ）注重變式教學，挖掘課本中例題、習題的內涵，或將原例題中的條件或結論改變一下，使之成為一個新例題；或將教材中的一些例題、習題改編為_些開放題進行教學，培養學生的創新能力和創新精神；或對課本例題、習題的解法來一個拓寬，探索其多解性（ 3 ）重視課本知識的歸納，培養學生的概括能力（ 4 ）將課本中的數學問題與生活中的實際問題聯系起來，強調數學的應用（ 5 ）在講解例、習題的過程中，融入數學史和數學的美學知識，激發學生的學習興趣。In the face of such rapid changing mathematics living environment, " the curriculum reform outline of the basic education ( tried ) " in our country has put forward clear request for teaching to enhance the general application of the it to teaching energetically, promote the integrating of the it into subjects. the new “ curriculum standard of mathematics " has pointed out the direction of the reform in mathematics education : we should consider it as students ' powerful tool to solve the mathematics problems, try to change students " learning manners and make students happier and have more energy to be involved in realistic, exploratory mathematics learning activities 。 it is a brand - new subject to integrate it into mathematics teaching in our country, so first this paper is devoted to the concept of integrating it into mathematics teaching : under the guidance of advanced teaching theory, i think it is not only a cognitive tool and emotional motive tool of facilitating students " independent study, but also tools of enriching teaching environment. to apply these tools to mathematics teaching organically will enable them to become students " cognitive tools probing into and solving the mathematics problems independently and to train students " ability so that the efficiency of mathematics learning and teaching can be improved. the key of integrating it into mathematics teaching is to achieve the teaching
基於信息技術與數學教學整合在我國是一個嶄新的研究課題，因此本文首先探討了信息技術與數學教學整合的內涵：即在先進的教學理論指導下，把以計算機及網路為核心的信息技術，作為促進學生自主學習數學的認知工具與情感激勵工具，作為豐富教學環境的創設工具，並將之有機地運用到數學教學中，使之成為學生認知、探究和解決數學問題的工具，從而培養學生自主探究、解決數學問題的能力，提高數學教學效率、改善教學效果；整合的關鍵就是如何有效應用信息技術的優勢來更好地實現數學學習目標，培養學生創新能力和實踐能力；其二、探討了信息技術對數學教學的影響；其三、探討了信息技術與數學整合的理論基礎、基本模式及相應教學策略；其四、探討了信息技術與數學教學整合的運用設計- - -教學課例與軟體；其五、對信息技術與數學教學整合實踐進行了一些調查；最後對信息技術與數學教學整合出現的一些問題進行了思考。分享友人