模型理论

According to the influence of air pollutant source parameters, weather factors, approach underlying surface layer and non-linearity reaction, the correction coefficient is to modify final simulate value, which perfectly resolves the problem of the result probability and complexity actually. Therefore, the result of the model is more reliable.(2) Long-term monitoring average concentration isoline map and simulating air pollutant concentration isoline map are drawn by drawing function of surfer 8.0 software.

本研究提出的长期平均浓度模型的预测值与实测值的相关系数r=0.813在α=0.05下通过检验，且验证的样本量大，计算结果具有代表性，为湛江市郊区环境空气质量全面预测和污染防治提供理论依据，该模型亦可进而推广应用于SO_2、NO_x、CO等大气污染物的扩散状态研究和计算。

In this paper the dynamics characteristics are analyzed theoretically at first. According to the unique configuration and mechanics characteristics, the mechanics model and kinetic differential equation of the half-tracked air-cushion vehicle are established. Algorithm of mechanics and lifting-state parameters are put forward and analyzed. And variation ranges of the driving state parameters are obtained and the corresponding influence factors are analyzed. The further qualitative studies on control model are carried out.

因此，本文首先从理论上分析了半履带式气垫车的动力学特性，根据半履带式气垫车的独特结构和力学特性，建立了半履带式气垫车的力学模型和相应的运动微分方程，提出并分析了在纵摇与升沉运动时，半履带式气垫车的力学参数和垫升状态参数的计算方法，得到了在行驶过程中各运行状态参数的变化规律，并分析了相应的影响因素，进而对控制对象模型进行了定性研究。

Empirical evidence on the relationship between "tunneling" and earnings management suggests that,"tunneling" would decrease the transparency of the whole economy, and then decrease the capital allocation efficiency of capital markets, finally delay the economic growth. Under the conditions that investor protection is very poor and ownership is concentrated, listed companies in Chinese stock market are always agencies of controllers to get private benefits at the expense of minority shareholders.

正出于此，本论文以我国股票市场特殊的制度背景为出发点，在参考Bebchuk（1999）模型的基础上，发展了一个理论模型来证明，在投资者保护薄弱和所有权集中的制度背景下，控股股东具有充分动机来侵占少数股东利益获取控制权私利。

Therefore, alogical generalization of limit cycle in stochastic models needs to be developed, andinterestingly, the concept of circulation in the mathematical theory of nonequilibriumsteady states [91] actually plays the role.

因此，需要研究随机模型中对应于确定性模型极限环概念的合理推广；而在关于开系统非平衡定态的数学理论[91]中，环流恰好可以扮演这样一个角色。

The track structure of low electron, proton and alpha particle in water as a media has been calculated with Monte Carlo method. The spectrum of DNA damages has been simulated by the track structure model. Then the surviving fraction at different dose level is calculated by connecting track structure and phenomenological dynamic model.

在理论方面，对电子、质子和α粒子在水中的径迹结构进行了系统地研究与计算，还编制了我们自己的质子的蒙特卡罗模拟程序；用径迹结构模型计算出电离谱并与动力学模型相联系，计算出有实用价值的成活率。

Paper studies the practical stability of electricity market models by tools, for example, the appropriate structure Lyapunov functions, Cauchy matrix, the matrix measure, constant variation. Judging practical stability sufficient conditions and estimating formula of ultimate convergence boundary are provided. Conditions are descriptive by coefficients of models. At the same time, paper studies the Lyapunov stability of the electricity market. As well as the sufficient conditions of judging electricity market Lyapunov stability are provided. Some of conclusions improved the results of Alvarado and others. The conclusion of Lyapunov stability has made a comparative with practical results.

首次将实用稳定性理论和方法应用于电力市场稳定性的研究中，借助于构造合适的Lyapunov函数、柯西矩阵、矩阵测度、常数变易法等工具，系统研究了所建电力市场模型的实用稳定性，得到了用模型的系数来描述其实用稳定性的一系列判定条件和最终收敛边界的估计公式；同时对电力市场的Lyapunov稳定性进行了研究，得到了电力市场稳定性的若干判据，部分结论改进了Alvarado等人的结果；随后将Lyapunov稳定的结果与实用稳定进行了比较。

At the same time, this thesis focuses on the theoretical research on the LBGK method and discusses the inner relation between the LBGK and the N-S equations.The relationship among the selection of velocity group , the forms of equilibrium distribution functions,and the macroscopic N-S equations is clearly revealed.LBGK method has many advantages, such as easy dealing with the complex boundary conditions and high amenability to parallel computing.

本文系统地总结了各种LBGK模型，特别是对LBGK模拟二相流和多相流模型进行了认真地研究；同时从新的角度对LBGK进行了理论研究，用全新的方法探讨了LBGK和N-S方程的本质联系，清晰地揭示了速度族的选择、平衡态分布函数的形式和宏观NS方程三者之间的关系。

In this paper, the overall design scheme of one assault rifle prototype with double cyclic systems and variable firing rate is illuminated in brief and the related analytical models of one DOF and two DOF by the basic theory of dynamics of multi-rigid-body system is established. The calculating analogue program in VB computer language for analyzing the movement regularities of floating body of the assault rifle prototype with some universal property and function of man-machine conversation is completed. The comparison between the calculating results and the experimental results is conducted also.

本文对某步枪双循环变射频发射原理样机方案进行了简单的说明，应用多刚体系统动力学基本理论建立了原理样枪的一自由度和二自由度动力学分析模型，用VB编写了具有一定通用性和人机对话功能的自动机运动规律分析计算程序，并将计算结果与试验结果进行了比较，验证了数理模型的正确性。

But the building safety incidents' reasons are complex, the qualitative analysis is easy, the quantitative analysis is difficult, the common forecast model is tendency analytic method, return analytic method, index smoothing procedures and so on.

论文《灰色理论及神经网络在建筑伤亡事故预测中的应用研究》以1994-2007年全国建筑业死亡人数为基础数据，建立了灰色预测模型和BP神经网络预测模型，对2008的建筑业死亡人数进行预测。

Through the analytical solutions of momentum differential equation for a stream with varying mass, a general characteristic parameter , depending on structure scale and flow parameter, is introduced.

在径向流体分布器的变质量动量方程理论模型的基础上，通过对模型解析解的分析，获得了包括径向分布器结构尺寸和流动参数的特征参数k／C。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。