查询词典 mathematical models

Some new results are obtained from the studies: 1 a novel thermokinetic research method, the characteristic reduced parameter method, has been proposed, and the kinetics of oxidation of benzoquinone by hydrogen peroxide has also been investigated with this method; 2 the kinetic mathematical models that the metallomicelles made from the mono-nuclear or dinuclear complexes and surfactants catalyze the phenolic derivant oxidation have been established respectively; 3 the feasibility and mechanism that the metallomicelle, a mimetic model of peroxidase, catalyzes the phenolic derivant oxidation has been discussed.

研究得到如下新的结果：(1)提出了一种新的热动力学研究法——特征对比参量法，用该法研究了过氧化氢氧化苯醌反应动力学；(2)分别建立了由单核和双核金属配合物与表面活性剂形成的金属胶束催化酚类氧化反应的动力学数学模型；(3)探讨了金属胶束模拟过氧化物酶催化酚类氧化反应的可行性及其机理。

The testing, answering system was developed out by the ASP.net. Two test papers were abstracted from the system by the combination of the certain proportion and binominal distribution mathematical models stragety. The two test papers were tested by 52 students through the cross design. The difficulty and discrimination of items and the reliability and validity of the test papers were worked out with Education Statistics, factor analysis, relative analysis etc.

运用ASP.net技术开发了组卷、答卷、阅卷系统，应用重点等级定额比例分配与难度等级二项分布数学模型相结合的组卷策略随机抽出2套试卷，采用交叉设计对52名预防医学本科学生进行测试，用教育测量学原理、因子分析、相关性分析等方法分析两套试卷试题的难度、区分度和试卷的信度、效度。

In order to study characteristics of the calciner, it is significant to simulate the three-dimensional flow in calciner with proper mathematical models.

为充分了解分解炉的性能，应用适宜的模型来模拟分解炉内部三维流场是很有意义的。

The mathematical models of the days of preserving Castanea blume with the temperature of thermal process, the time of heating treatment and the pH of C.

采用二次正交旋转组合试验设计方案，建立了板栗的保存天数与热处理温度、时间及板栗pH值的数学模型。

For researching the coinstantaneous working process of every unit of the hydraulic device and the influence of the main parameters on control effect,the software named AMESim was used to establish the model of the hydraulic device.The mathematical models of the main parts were built to provide suggestions for design and matching of the hydraulic control device.

为研究此液压系统中各单元的协同工作过程和其内部主要液压参数对控制效果的影响，采用AMES im这一模块化的建模平台，对整体液压控制系统进行了建模，并建立了主要模块的数学模型，为ESP液压控制单元的设计和匹配提供了依据。

With the reasonable hypotheses to the configuration of the desuperheater and pressure reducer, the mathematical models about the decompression valve and the throttling disk were established.

通过对喷水减温减压器结构的合理简化，建立了减压阀和节流孔板的数学模型。

This paper analyzes the principle of the LP-LFC process,presents the physical and mathematical models of mould filling of the new process. The patterns including window-plate, ladders cluster, electromotor frame and exhausting manifolds are poured using LP-LFC process with AZ91D alloy, and the mould filling course is tracked with electrode touch point method. Based on above tests and experiments,the casting defects including short runs, cold laps, trapped gas,metal penetration, and so on, were investigated. The appearance characteristics,birth causes and influence factors of above defects are discussed in the article,diagrammatize modes of the defects forming is also given, and the measures of reducing or avoiding defects are put forward.

本论文分析了低压消失模铸造技术的工艺原理，建立了低压消失模铸造过程中金属液充型的物理和数学模型；在各种工艺条件下浇注了薄板窗体、阶梯模样簇、电机外壳和发动机排气管四个典型的模样和产品，用电极触点法记录了镁合金低压消失模铸造的充型过程；试验研究了镁合金低压消失模铸造中出现的浇不足、冷隔、气孔、粘砂等典型缺陷，分析了这些缺陷的形貌特征、形成原因及影响因素，给出了缺陷形成过程的图解模型，提出了减少和消除缺陷的工艺措施。

In this paper the mathematical models and methods for GPS single-point positioning are studied systematically on the theory.All kinds of error correction formulas are studied,such as ironsphere correction,troposphere correction,relativistic effect correction,earth rotation correction ,earth tides correction ,satellites antenna phase center offset correction. GPS single-point positioning programs is coded with pseudoranges and broadcast ephemerides,phases and broadcast ephemerides,and phases and precise ephemerides.And a great amount of computation has been done using the data collected .The results are computed with the 24 hour pseudoranges observation data before and after the canceling of the SA.

本文从理论上系统地研究了GPS单点定位的数学模型和方法，研究了各项误差改正公式，例如电离层改正、对流层改正、相对论周期部分改正、地球旋转改正、地球固体潮改正、卫星天线相位中心偏差改正；编写了伪距与广播星历、相位和广播星历及相位和精密星历的定位程序，并使用有关数据进行了大量的计算工作。

Stiff mathematical models of hydropneumatic spring s show that some relevant factors such as the volume of gas accumulator and the temperature of operational environment markedly affect the stiffness of hydropneumatic spring s.

对油气弹簧刚度特性数学模型的分析显示，储气室总容积、环境温度等对油气弹簧的刚度特性有明显影响。

Proposes the concepts of nonlinear circulant system and nonlinear circulant switched system and develops correspondingly the mathematical models,which are extended from Hypercycle as a biological.

在生物学超循环系统的基础上，提出了非线性循环系统和非线性循环切换系统的概念，并建立了数学模型，这类系统具有广泛的实际背景。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。