模型理论

The theoretical models for investigating the fusion mechanism of heavy nucleus collisions and calculating the formation cross sections of superheavy nuclei have been introduced.

介绍并讨论了研究超重核合成的主要理论模型以及近年来在研究重核熔合机制和超重核合成理论模型方面的进展。

In this paper,a mathematical model of sampling process is presented,based on stochastic processes theorem,then using this model,we establish a fire\|new equivalent sam pling theory.

在随机过程理论基础上建立了采样过程的数学模型，并利用该模型建立了一种全新的等效采样理论。

In addition, a model computing the nonadiabatic coupling terms in photochemistry of pericyclic reactions has been suggested at the level of HuckelHubbard theory, and a series of nonadiabatic transitions for such reactions have been discussed based on the model proposed.

此外，还在H-H理论水平上建立起光化学周环反应的态-态非绝热偶合计算模型，用这种理论模型讨论了一系列光化学周环反应中的非绝热跃迁问题，获得了势能面、非绝热偶合项和立体选择性。

On the base of comparatively analysis about various design method to piles cap, a new compound material——steel fiber reinforced concrete is first applied in piles cap. The modeling experiments on 9 three-pile caps and 15 four-pile caps specimen are carried on, the mechanic characteristic of piles cap and obvious effect of adding steel fibers into concrete are analyzed in detail, which provide reliable experimental basis for establishing the loadtransferring model of piles cap.

在分析比较各种有关承台设计计算方法的理论体系后，首次将钢纤维混凝土这种新型复合材料应用于桩基承台进行理论研究，并基于9个三桩承台和15个四桩承台的模型试验，详细分析了承台的力学性能，以及钢纤维的掺入对提高构件承载能力，延缓裂缝开展，有效降低承台厚度等方面的显著影响，为桩基承台传力模型的建立提供可靠的试验依据。

On the basis of thermoviscoplastic theory, the dynamic recrystallization model of tension was constructed. This model was introduced into the finite element analysis of tension of AZ31 magnesium alloy sheet by changing temperature.

摘 要：基于热粘塑性本构理论，构建拉伸动态再结晶理论模型，并将该模型引入AZ31镁合金薄板变温拉伸的数值仿真。

The dissertation relies on National Natural Science Fund Supported Project "Research on Complexity and Models of Inhabitants Reorganization and Trip Distribution", Jilin Province Preeminence Youth Fund Sustentation Project "Research in Macro-Traffic Flow Theory" and Supported by Foundation for University Key Teacher by the Ministry of Education Project "Research on Theory and Models of Inhabitants Reorganization and Trip Distribution".

本学位论文依托国家自然科学基金资助项目&居民重组与出行分布中的复杂问题及其模型研究&、吉林省杰出青年基金资助项目&宏观交通流理论研究&和高等学校骨干教师资助计划项目&居民重组与出行分布理论及模型研究&而完成。

The analysis on pressure and saturation distribution was made with the four-dimension well testing model.

以黑油模型为基础，建立了考虑层间窜流的多层、多相数值试井理论模型，实现了压力场和含油饱和度的&四维试井理论&分析。

Roll wear is a factor difficult to determine and there is no suitable theoretical model till now In this paper,the theoretical model of roll wear is established from the view of tribology,and the roll wear on finishing train of 2050 CVC hot strip mill has been measured The calculated results agree well with the measured,so the model for roll wear is of important significance for shape control

轧辊磨损是当前生产中难以定量确定的因素，磨损预报至今尚无精确的理论模型可利用。本文从摩擦学原理出发建立了轧辊磨损的理论模型，并对宝钢 2 0 5 0 CVC热连轧机精轧机组的轧辊磨损量进行实际测量，计算结果与实测值吻合较好，对提高磨损预报精度、提高板形控制技术水平具有重要意义

So a systematic model for the running-in process of the piston ring and cylinder bore based upon the mixed lubrication theory, the wear theory and the computer simulation model of the variation of the surface topography has been developed.

基于这个考虑，本文将仿真模型和磨损理论、内燃机缸套与活塞环的混合润滑理论相结合，建立了一个关于内燃机缸套与活塞环磨合过程的系统模型。

By analyzing and handling the experiments results, we obtained the rules of change of hydrodynamic characteristics of the cycloidal propeller in the pitch ratio varying from 0.2π to 0.75π and the steering angle varying from -90°to 90°, such that a foundation has been laid for using it in practice, and for setting up the theoretical calculation method of cycloidal propeller.

一、通过分析摆线推进器的工作原理，设计并加工了实验模型和实验装置，在哈尔滨工程大学船模水池对该模型进行实验，经过合理的理论分析和数据处理，获得了螺距比从0.2π到0.75π，方向角从-90°到90°范围内的水动力变化规律，为建立摆线推进器水动力性能理论计算方法和工程应用奠定了基础。

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％。