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 establishing mathematical model 建立数学模型(23)数学建模(3)
 建立数学模型
 So, this text is based on the combination of military traffic geography and geographical information system, and realizes analysis and evaluation of military traffic geography through establishing mathematical model. 因此，本文是以军事交通地理与地理信息系统相结合为基础，通过建立数学模型来实现军事交通地理的分析评价。 短句来源 This paper firstly presents the conception and the process of optimization design,and analyses the advantage of MATLAB optimization toolbox in solving optimization problem. Then this paper designs and implements an optimum investment project through establishing mathematical model, choosing an algorithm named Sequential Quadratic Programming, utilizing a nonlinear restraint function in MATLAB optimization toolbox and programming in MATLAB. 本文首先介绍了优化设计的概念和过程,分析了MATLAB优化工具箱的求解优化问题的优点,然后通过建立数学模型,选择序列二次规划算法,利用MATLAB优化工具箱中的非线性约束优化函数,在MATLAB平台下编写程序,设计和实现了一种最优投资方案。 短句来源 This paper introduces imitation of the expert experence, whole procedures for establishing mathematical model and clinical effects. 本文介绍了专家经验的模拟,建立数学模型的全过程和临床效果。 短句来源 By establishing mathematical model, and applying the PID control, we have an emulation trial to the concentration of CO2 in air-conditioned train at the environment of SIMULINK, to keep the concentration of CO2 at the given concentration, achieving the aim of controlling fresh air. 通过建立数学模型,并采用PID控制,在SIMULINK环境下对空调列车中的CO2浓度进行了仿真控制,使其维持在设定浓度,达到合理控制新风量的目的。 短句来源 On the basis of establishing mathematical model, the paper analyses the influence on two sides. 在建立数学模型的基础上，从两方面分析这种影响。 短句来源 更多
 数学建模
 To resolve the problems, i. e., the current output signal decreases while temperature increases and automatic adjustment on output signal in accordance with saltness of solution cannot be realized, the paper introduced the method of by establishing mathematical model for membrane dissolved oxygen electrode and implementing software compensation on temperature and saltness. 介绍了膜式溶氧电极作数学建模 ,进行温度和盐度的软件补偿 ,解决了膜式溶氧电极随温度上升电流输出信号反而减小 ,不能自动根据溶液盐度调整溶氧输出信号大小的问题。 短句来源 The design flow and method established the base for flux model, which is a must for designing hydraulic systems. 3. By discussing characteristics and working conditions of some kinds of electro-hydraulic control system, designing CVT hydraulic control system scheme building hydraulic system flux model, and establishing mathematical model of control valve clamping force, the control process characteristics of hydraulic control system due to system main pressure and speed ratio were analyzed. 3.为了分析液压控制系统对系统主压力和速比的控制过程,探讨了不同类型电液控制系统的优缺点和适用条件,进行了CVT 液压控制系统的方案设计,建立了CVT 液压控制系统的数学建模,得出了液压系统的流量模型,进一步完善了液压系统力学模型,分析了液压控制系统对速比变化率的影响。 短句来源 Objective Through establishing mathematical model of the distribution of laser, photosensitizer and their interaction relationship, to simulate the production of singlet oxygen in vascular, analyze the effects of varied factors on photodynamic therapy of port wine stains, preliminarily explore the applicable value of mathematical modeling in photodynamic reaction system. 目的通过建立光动力学治疗鲜红斑痣中激光、光敏剂的分布及其相互作用关系的数学模型,对微血管中单态氧的产生过程进行仿真,分析各种因素对治疗的影响,对数学建模在光动力反应体系中的应用价值进行初步探讨。 短句来源
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 Establishing mathematical model for SBR substance degradation and estimating the parameters SBR法基质降解数学模型的建立和参数估计 短句来源 In accordance with experimental data of the HT polymer sensor, applying the method of establishing mathematical model, the paper figures out mathematical model of HT polymer sensor, and gives the establishing course of their similar sensors' mathematical model. 根据HT高分子传感器实验测试数据,应用数学模型的建立方法,推算出该传感器的数学模型,并给出了类似传感器数学模型的建立步骤。 短句来源 Analysis of Inadaptability of Establishing Mathematical Model for Production Quota by Adopting Method of Regression Analysis 应用回归分析的方法建立劳动定额数学模型的不适应性分析 短句来源 In this paper, MATLAB software is used for establishing mathematical model aboUt a controlled object. The PID parameters are adjusted according to experience formula of Ziegler-Nichols. 首先利用 MATLAB软件建立被控对象的数学模型，再按Ziegler－Nichols经验公式整定出PID参数。 短句来源 Abstract According to the difficulty of establishing mathematical model and the high requirement of control accuracy in the decomposition temperature control system for sand-shaped aluminium oxide,the basic idea and design method of multi-construction control strategy are presented. 本文根据砂状氧化铝分解温度控制系统中数学模型难于建立、控制精度要求高的特点，提出了多结构控制策略的基本思想和设计方法。 短句来源 更多

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 If we transform fluid power systems into networks, network theory can be used as a powerful tool for analyzing them. The development of network theory has provided us with many standard and symmetric methods which can be used to establish mathematical models for fluid power systems. Network methods can, therefore, facilitate the computer analysis of fluid power systems and help to create computer simulations and computer-aided designs.In this article the linear models of the elements of fluid power... If we transform fluid power systems into networks, network theory can be used as a powerful tool for analyzing them. The development of network theory has provided us with many standard and symmetric methods which can be used to establish mathematical models for fluid power systems. Network methods can, therefore, facilitate the computer analysis of fluid power systems and help to create computer simulations and computer-aided designs.In this article the linear models of the elements of fluid power systems are described. On this base we establish the networks for flow control valves withpressure compensation and two-stage relief valves. The impedance matrix andadmittance matrix for these valves are deduced separately, using the loop method and the node method. Their dynamic character is accordingly analyzed by analytical and numerical method.At the end of this Paper, we introduce a programme which is derived through the above mentioned method. It is used to compute the frequency character of the y-type two-stage relief yalves, 液压系统是由油路构成的网络,它和电路一样,都服从克希霍夫结点定律和回路定律,因而可以用网络理论提供的规范化的方法来建立液压系统的数学模型,以便实现液压系统的计算机辅助分析和计算机辅助设计,使得能够在设计阶段予测系统的最终性能并实现最优化设计。 本文建立了油路元件的线性化模型。在此基础上,构作了调速阀和二级溢流阀的网络图,分别用回路法和结点法建立了它们的阻抗矩阵和导纳矩阵,并对它们的动态特性进行了分析。 在本文的最后,介绍了根据上述方法拟定的一个计算机分析程序,用来计算Y型溢流阀的频率特性。 It is of great significance to establish mathematical model of lacustrine delta for prospecting and developing the continental oil and gas fields. In the proposed model of lacustrine delta,cross-section of river bed is taken as a rectangle,the river month is considered as a sprayer,and the water flow from the riv- er into lake will be simulated by a free jet.Because downstreams of the most natural rivers are in the form of open-flow,the center flow line on the vertical section will be regarded as... It is of great significance to establish mathematical model of lacustrine delta for prospecting and developing the continental oil and gas fields. In the proposed model of lacustrine delta,cross-section of river bed is taken as a rectangle,the river month is considered as a sprayer,and the water flow from the riv- er into lake will be simulated by a free jet.Because downstreams of the most natural rivers are in the form of open-flow,the center flow line on the vertical section will be regarded as a 2-dimensional plane jet when the water flows into the lake.Take the calculated velocity-distribution along the center profile along the direction of flow bo- undary condition for such 2-dimensional jet,velocity components in the direction of the water flow and those along the river section transversely can be determined.If the debris carried by the river are regarded as ideal particles,and then the deltaic bo- undary,morphology in vertical section,and change of sediment sorting,under different hydrodynamic conditions of the river and lake,are calculated by the same tracing me- thod used in ballistic missile. The characteristics of lacustrine delta shown by mathematical model can be used in studying modern and ancient delta. 建立湖泊三角洲数学模型,对陆相油气田的勘探与开发工作具有重要意义。在湖泊三角洲模型中,假定河床横剖面为矩形,将河口比拟为一个水动力学上的喷咀,河水入湖形成自由射流。由于多数天然河流下游均呈开放性,所以,入湖后流向中心线纵剖面上的流动可以看作二维平面射流。将求得的中心纵剖面上沿河流向速度分量做为求解水平二维平面射流的边界条件,就可得到沿河宽方向速度分量和沿河流流向的速度分量。如果把河流携带的碎屑物看作理想颗粒,则就可采用与弹道式导弹相同的跟踪方法,求出不同河湖水动力条件下三角洲边界、纵剖面形态和沉积物分选性变化。用数学模型揭示湖泊三角洲特征,可以作为研究现代、古代三角洲的借鉴。 In recent years, at home and abroad more activities aimed to establish mathematical models of extraction systems have been carrying out. To make correct and reliable mathematical models for single-component is of great importance, because they are the basis of multicomponent models.In this work the equilibrium data were obtained for the extraction of dysprosium from HCl-H_2O solutions by 1M P204 (D2EHPA) in kerosene. The ionic strengh in aqueous phase(Ⅰ) and the fraction of mole concentration... In recent years, at home and abroad more activities aimed to establish mathematical models of extraction systems have been carrying out. To make correct and reliable mathematical models for single-component is of great importance, because they are the basis of multicomponent models.In this work the equilibrium data were obtained for the extraction of dysprosium from HCl-H_2O solutions by 1M P204 (D2EHPA) in kerosene. The ionic strengh in aqueous phase(Ⅰ) and the fraction of mole concentration of hydrochloric acid(Y_H)were chosen as variables.The following mathematical model for predicting distribution coefficients (D) for dysp: osium was presented: D=3.1001 I~(-1.7870) Y_H~(-0.6129) Applicable ranges of above mentioned model are 0.1～1 M dysprosium. and 1～3 M HCl respectively (equilibrium concentrations). The relative error is 3.93％.The model can provide correct prediction for distribution equilibrium concentrations. The model has a simple type and is very convenient to calculate. After correlating with T. K. Ioannou's data, it seems that the type of the model is suitable for other rare earth elements in same system. 本文在DyCl_3-HCl-H_2O-P204-煤油体系中于较宽的稀土浓度和酸度范围内建立了镝的萃取平衡数学模型:D=3.1001I-1.7870.Y_H-0.6129。模型的形式简单、计算方便、预报分配系数准确。通过对T.K.Ioannou等人提供的数据进行关联,可以看出这种形式的模型也适用于该萃取体系的其它稀土元素。 << 更多相关文摘
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