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The set of absorbing boundary conditions based on paraxial approximations of 3-D elastic wave equations are applied to the numerical boundaries.

在此基础上进行了三维盐丘地质模型的地震波传播数值模拟试算。

In this paper, on the base of paraxial approximations, we present a set of absorbing boundary conditions of 3D elastic wave equations and apply to the 3D elastic wave numerical modeling in isotropic medium.

本文基於傍轴近似法提出了计算三维弹性波方程的吸收边界条件公式，表示了各边界面、边棱和角点处波场所满足的单程波方程，并在三维弹性波数值模拟中进行了应用。

However, there are fewer papers that considered the singular two-point boundary value problems in abstract space and sign-changing solutions problems.

对于抽象空间中奇异两点边值问题，以及变号解的研究，这方面的结果还是相对较少的。

The differential eguations and boundary conditions are established, based on these hypotheses. The theoretical formulary about sample atom number with different diffusion coefficient are reasoned out; the relationship between the isotope abundance ratio and the sample wastage of melting and solid samples and the samples simultaneously at evaporation and decomposition are discussed in theory.

根据这三条假设建立了样品原子数的微分方程及边界条件，推导出了不同扩散系数的样品原子数的理论公式，从理论上讨论了熔融态、固态样品以及蒸发分解同时发生的样品同位素丰度比与样品消耗量间的关系。

Based on law of non—statistics method, the quality rule for selection of antifreezing admixture in winter concreting was analysed, and the acceptance boundary line of concrete strength to select antifreezing admixture type in different weather conditions was also presented.

用非统计法原理分析了冬施中砼防冻剂选用的质量原则，并根据不同气温条件下，选用防冻剂品种，给出了控制冬期砼施工质量的防冻剂砼强度验收界限，供施工单位参考。

In the aspect of yield optimization, the worst-case distance from the circuit parameter center to the acceptance region boundary are treated by the objective function of yield optimization.

在电路成品率优化方面，将当前电路参数中心到可行域边界的最坏情况距离，作为电路成品率优化的目标函数，利用梯度优化算法，使最坏情况距离达到最大，从而优化电路的成品率。

The donor impurity and grain boundary combustion-supporting agent containing acceptor impurity were added successively in the ceramic powder during ceramic powder preparation, both of them can also promote grain growing and semiconductive, and the combustion-supporting agent can be good to form insulation layer in oxidizing process.

采用一次性烧成技术研制了晶界层半导体陶瓷电容器，在瓷料配制过程中先后加入施主杂质和含有受主杂质的晶界助烧剂，两者在还原烧成时促使晶粒生长并半导化，助烧剂在氧化时有利于晶界绝缘层形成。

Charon's purpose was to ferry the souls of the dead across the River Acheron, a segment of the River Styx, the boundary of the Earth from the Greek Underworld.

卡戎是希腊神话中的人物，摆渡死者的灵魂穿越连接人间和冥界的冥河的神。我没按原文翻译。

The outer, non-metallic layers of the planet form what are known as achondrite stony meteorites, and there is a separate class of stony-irons that come from the boundary between inner core and outer layer.

位于行星外部的非金属层形成无球粒陨石石质陨石，在内核和外层之间还存在有一层独立的石质铁层。

Mainly, the article divides into six contents: system development background and method of exploitation, demand analysis, system analysis, system design, system implementation and conclusion. In demand analysis, has established first with the example model, and comes the detailed description through the active chart to use the example. Through the sequence chart and the VOPC chart, I completed the definition of boundary, control and data entity of the fore-platform in system analysis. The system design mainly has carried on the detailed design to kind of and the database.

在需求分析中，先建立了用例模型，通过文字和活动图来详细的描述用例，确定了前台子系统的各个功能模块；系统分析中，使用序列图和VOPC图完成了对系统运作过程中涉及的界面、控制、数据实体的定义；系统设计主要主要对类及数据库进行了详细的设计；系统实施中，对前台子系统的物理部署、实施环境进行描述，包括系统的主要界面和部分代码。

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。