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Based on the perfectly matched layer absorbing boundary condition, a new form of PML absorbing boundary condition in cylindrical coordinate suitable for optical fiber is derived.

在已有的完全匹配层吸收边界条件的基础上推导了圆柱坐标系下适用于光纤计算的PML吸收边界条件。

Using the calculation formula of reflection ecergy, transmissin energy and incidence energy and equivalent principle of electric signal received by detector and seismic wave energy reflected by underground lithologic boundary, the formula of interval velocity and strata density are derived.

根据运动学中的动量守恒定律、分析地震勘探过程中地震波在地下介质中的传播过程,利用反射能量、透射能量与入射能量的计算公式和检波器转化的电信号与地下密度界面反射地震波波动能量的效原理,推导出直接求层速度和层密度公式。

Decision properties are derived from constraints and are primitive data representing the status of design objects Performance properties calculate decision properties and the domain are bounded by design constraints.

决策参数是从限制条件中抽象出来的数据,代表设计对象的属性或状态;表现参数是对决策参数的计算和度量;限制条件规范及限制表现参数的域值,可视为类不变量,每个类对象都必需满足之。

Considering the uncertainties of peak acceleration and frequency characteristics by using a bounded convex set model,the bounds of shear forces are derived from the Chinese seismic code,and then a new lateral bound load method for pushover analysis is proposed.

动力弹塑性时程分析法是一种较理想的结构抗震性能评估方法,但由于地震动的选取对其结果影响较为显著,而且目前尚无关于地震动选取的统一标准,从而严重地阻碍了动力弹塑性时程分析法的应用。

Greattong guo years, and so are more thanfen tiao , soy, starch and various spices derived fromlu zhi cooking.tong guo aircraft will be sold at the cage trap box, under the basin in order to buy charcoal insulation; pot, the stew on meatball, pork slices fried tofu films and so on: the diameter of the casserolechi yu (commonly known as percutaneous pot), the dishes were brain tofu.

大铜锅里,是以上等的粉条、黄豆、淀粉及各种调料煮制而成的卤汁。售卖时将铜锅架在笼圈套盒里,下置木炭盆以保温;火锅里,炖上丸子、猪肉片、油炸豆腐片等:直径尺余的砂锅里,则盛着脑豆腐。

The brachistochrone of an electric ball in the electromechanical coupling field was investigated according to variational method,and the corresponding governing equation(Euler-Lagrange equation) was derived.

通过变分原理的方法研究力电耦合场中带电小球的最速降线问题,导出其轨迹控制方程,即Euler-Lagrange方程。

Characterization of complementary DNAs derived from braconid wasp ovaries identified genes encoding subunits of a viral RNA polymerase and structural components of polydnavirus particles related most closely to those of nudiviruses—a sister group of baculoviruses.

基因编码的RNA聚合酶亚组和多去氧核糖核酸病毒粒子的结构组件,与nudiviruses有着密切的联系。而通过来自小茧蜂卵巢互补DNAs的表征可以将两者识别出来。

According to the theory of acousto-optic interaction,the formulas of diffraction loss of two AO Q-switches,which acousto-field are perpendicular or parallel one another,in normal Bragg diffraction are derived.

分析了单声光器件、超声场相互平行和相互正交的两声光Q开关器件衍射损耗,给出正常布喇格衍射的超声场相互平行和相互正交的双声光Q开关器件衍射效率的表达式。

A rigorous coupled wave theory for the Bragg diffraction of a Gaussian beam in the uniaxial crystal is derived and a group of rigorous coupled wave equations and diffraction efficiency formula are obtained in terms of the proper coordinate transformation and Riemann method .

利用适当的坐标变换和黎曼方法建立了高斯光束在单轴晶体中布拉格衍射的严格的耦合波理论,获得了一组严格的耦合波方程和衍射效率计算公式,讨论了衍射效率随折射率调制量的关系以及波长选择性和角度选择性,同时分析了衍射效率对再现光宽度的要求。

The principle of the two dimensional acoustooptic Q switch is presented,the formulas of the diffraction efficiency and diffraction loss of the AO Q switch with normal Bragg diffraction is derived,the relationship between One dimensional and Two dimensional Bragg diffraction is analyzed.

描述了两维声光Q开关的基本原理,详细推导出正常布喇格衍射的两维声光Q开关衍射效率和衍射损耗的表达式,分析了两维布喇格衍射和一维布喇格衍射之间的关系,并给出了在驱动功率40W、光束直径5mm、光波长1。

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And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时,论述了一体化管理体系构建中的几个主要问题,包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。

If you're huffing and puffing at any point during the run, slow down and make sure you can take deep breathes.

如果你任何时候在跑步过程中气喘如牛,降低速度并且确保你能够深呼吸。