物理过程

In order to improve present Monte Carlo methods, method changing the node to optimistical orientation corresponding to the system having the lowest energy was proposed, which ensures the grain boundary moving to its curvature center. The new method avoided re-nucleation, and increased simulation efficiency, and made the simulation process more approaching the physics foundation of grain growth. The results show that the grain growth exponent, n=0.478, is close to its theoretic value, and the topological structure accorded with the normal grain growth of the real material.

简要回顾了晶粒长大理论并分析了现有Monte Carlo模拟方法的不足，提出了一个"择优转换"方法，确保节点转换时晶界向其曲率中心移动，以致模拟过程更接近物理基础，避免了重新形核的发生，使模拟效率大大提高，模拟的晶粒长大指数达到0.478，已接近理论值，组织形貌和实际材料正常晶粒长大组织基本一致。

This thesis proposes a stochastic analysis method of risk assessment for breakwater wave overtopping and stability by physical experiments and calculated results by design codes.

由于奥帆工程的安全问题关系到奥帆赛成功举办和国际声誉，因此其水工结构经过了有关单位的设计并通过了大量的物理模型试验和数值模拟验证，但无论是"设计规范"还是物模试验都没有考虑到复杂多变的海洋环境的不确定性及其对工程设计的影响可能会导致工程在使用的过程中出现意外，因此必须对工程的设计进行系统的风险分析。

By comprehensively using the information of lithostratigraphy, paleobiology, isotope, paleomagnetism, fission track of apatite, well-logging, geophysics and petroleum geology, the characteristics of the sedimentary wave processes in the Tazhong uplift, North depression and the Tabei uplift were studied by the wave process analysis method under the direction of the wave theory of the earth's crust movement in this paper, and the main achievements are as follows

本文以地壳波状运动理论为指导，综合利用岩石地层、古生物、同位素、古地磁、磷灰石裂变径迹、测井、地球物理、石油地质等方面的资料，运用沉积波动过程的研究方法，研究了塔里木盆地环满加尔地区(塔中隆起带，北部坳陷和塔北隆起)的沉积波动特征。

The parabolic partial differential equation is an important type of mathematical physical equations. It can describe the problems of heat conduction, seepage flow and diffusion, et al.

抛物型偏微分方程是描述热传导、渗流、扩散等过程的一类重要的数学物理方程。

Based on modern optimization theory and optimal control theory, this dissertation studies some questions as follows:1. The optimization model of parameter identification of three-dimensional geologic history numerical simulation, algorithm and its applicationGeologic history numerical simulation is a basic content of basin numerical simulation, and the porosity is the major parameter in the evolution and development process of oil-bearing basin. According to the sedimentation and burial mechanism, the physical and chemical principles of oil geology, the mudstone porositys non-linear parabolic partial differential equation has been established.

本文应用现代最优化及最优控制理论，对如下一些问题进行了研究： 1、三维地史数值模拟的参数辨识优化模型、算法及应用地史模拟是盆地数值模拟的一个基础性的研究内容，地层孔隙度是含油气盆地地史演化发育过程中的重要参数，根据地层沉积埋藏机理和石油地质的物理化学原理，通过引入数学物理方程概念，建立了泥岩三维孔隙度场方程，根据问题的特点，给出了方程的定解条件，对方程的动边界也给出了处理方法，并且证明了解的存在性与惟一性，在此基础上建立了以当今实测数据为拟合准则的三维地史数值模拟的参数辨识优化模型，这是一个含有二阶偏微分方程约束的泛函极值问题。

We believe that this mechanism is also suitable for other dilute paramagnetic ions doped systems.

我们相信这一物理机制同样适合于描述其它顺磁离子掺杂系统的光学失相过程。

It is a repeating sequence of steps or actions which are executed in a timely and efficient manner, parceling out CPU time to all of the myriad tasks the game engine is required to perform: logic, physics, animation, rendering, handling of input.

在这个不断重复执行的过程中，我们需要把CPU时间按照一定的规则分配到不同的任务上，这些任务包括：逻辑、物理、动画、渲染、输入处理等等。

In using course, our products reflect stability and perfectibility in connecting and disconnecting, long using duration, the whole quality of products is leading positions on average level of domestic market.

凭借先进的工艺技术及装备，选择优良的原材料及严密的质量控制，使生产的离合器面片具有优异的耐磨损性能和物理机械性能，在使用过程中接合平稳、分离彻底、使用寿命长，整体质量水平目前在国内居先进水平。

It plays significant role in the processes of atmospheric physics, atmospheric chemistry, atmospheric optics, and atmospheric photochemistry.

黑碳气溶胶是气溶胶的重要组成部分，在大气物理、大气化学、大气光学、大气光化学等过程中具有重要作用。

JACK: There will be ongoing physical therapy, but if she works really hard...

会有一个物理治疗的过程。但如果她工作过度。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。