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The VCL method and the displacement method are used to calculate the Stress Intensity Factors of semi-elliptical surface crack at the root of pipe screws, on the basis of which a simplified calculating model for screws contact is put forward so as to analyse the fracture intensity for oil drill pipe screw coupling. For the semi-elliptical surface crack with different shape and deep ratio at the root of female and male screws and the corner of male flange, the SIF has been studied systemically under inter-pressure, tension, bend and torsion loads and the approximate formulas encluding the structure parameters of oil drill pipe screw coupling, deep ratio and the shape parameters of surface crack are developed.

对工程实际中的多种石油钻杆接头螺纹连接件，就公螺纹齿根、母螺纹齿根、公螺纹台阶转角处存在的不同形状、不同厚度比的半椭圆表面裂纹，在拉伸、内压、弯曲、扭转多种载荷作用下的应力强度因子作了系统研究，在大量有限元计算基础上，建立了包含接头结构参数、裂纹形状、厚度比在内的近似计算公式。

In oder to be in keeping with the real condition of torsional micromirror, the improved formulas for electrostatic force in finite scale parallel plate capacitor are introduced and the edge effects are taken into account.

而实际应用中的扭转微镜是有限尺度的，即在边缘处电力线会发生泄漏和弯曲，从而产生边缘效应。

Two simplified analysis formulas on using open circuit voltage and short circuit current are proposed to calculate PN junction quality factor and reverse saturation current of the photocell.

提出了两个使用开路电压和短路电流计算光电池PN结品质因子和反向饱和电流的简化解析计算公式。

According to trip-demand time and space distribution characteristics of urban citizens, the peak-hour trip factor and saturation of road network were chosen as the evaluation indexes, meanwhile the index calculation formulas were given; then on the basis of fuzzy logic theory and index characteristics, the membership functions were established by using fuzzy logic toolbox of MATLAB, and the evaluation results of two indexes were analyzed; Finally, the evaluation process was illustrated by a case study of Yangzhou and the results indicated the validity and practicability of the method presented in this paper.

根据城市居民出行需求的时间分布特性和空间分布特性，选用高峰小时出行系数和高峰小时路网饱和度作为评价指标，同时给出指标计算公式；进而以模糊逻辑理论和指标特性为基础，利用MATLAB中的模糊逻辑工具箱得到隶属度函数图形，并对指标值的评价结果进行了分析；最后，用本文提出的方法对扬州居民出行需求合理性进行评价，表明了该方法的有效性和实用性。

Our puppy and kitten formulas supply natural DHA through easy-to-digest salmon oil, optimizing your pet's potential for a healthy mind and body.DHA is a natural Omega-3 fatty acid critical for brain and vision development.

为幼犬和幼猫配方供应天然DHA通过易于消化的三文鱼油，提高宠物自身的免疫力，二十二碳六烯酸是一种天然ω- 3脂肪酸可以帮助大脑和视力发育。

Special rubber formulas provide oil and chemical resistance.

特殊橡胶配方，耐油和耐化学品。

The vibration velocity and sound radiation power curves of submerged cylindrical shell, has strong resonant characteristics. It can be described by resonance radiation formulas, which include superposition of inherence vibration modes, by using resonance radiation theory .

本文为验证共振辐射理论，对无限长和有限长圆柱壳体，首先计算了复共振频率并分析其固有振动特性，然后结合共振辐射理论讨论壳体振动和声辐射中各振动模式的贡献及其作用特性。

With the theory of mode split, the distortion of resonance curve of hydrophone is explained and math formulas describing the distortion of resonance curve are given, and then the interference process of hydrophone after mode split is simulated by MathCAD and the theoretical curve is plotted.

用模式分裂的原理解释了水听器的谐振曲线畸变现象，提出了描述谐振曲线畸变的数学公式，用MathCAD软件仿真了模式分裂后水听器的干涉过程并绘制了理论曲线。

It has always been a thoroughly commercial cinema, concentrating on crowd-pleasing genres, like comedy and action, and heavily reliant on formulas, sequels and remakes.

这一直是一个彻底的商业电影，集中群众满意的类型，像喜剧和行动，以及严重依赖公式，续集和重拍。

Based on Watson's three-level theory on statistical literacy and also on the statistical literacy cognition of, this thesis divided senior students' comprehension about central tendency into three levels:The first level: students can compute using the formulas about measures of central tendency.

第一水平：能根据集中量数的公式进行计算；第二水平：在现实背景下能选用合适的集中量数的统计量解决实际问题；第三水平：在现实背景下能合理解释所用集中量数统计量解决实际问题的理由。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。