值分布

The formulas for confidence limits of percentiles and percentages and tolerance limits of a normal distribution are given by means of the noncentral t-distribution.

建立了正态分布置信限曲线方程，给出了其百分位值和百分率的置信限公式和容忍限公式。

Worn surface morphology was examined with scanning electron microscopy, and wear volume was measured with a Talysurf 5P-120 topographer. Results show that CNTs, in mass concentration of 0.01%~0.1%, can greatly improve the antiwear ability of lubricating oil. With addition of CNTs, the maximum reduction of wear rate is about 57%, and scratches on the worn surfaces become slighter and more uniform. The maximum decrease of friction coefficient is about 15% with 0.025% CNTs additive at the load of 300 N. The antiwear mechanism has been discussed.

结果表明：碳纳米管作为润滑油添加剂表现出优良的抗磨性能，在质量分数仅为0.0125%～0.1000%时，润滑油的抗磨性能显著提高；在质量分数约为0.0500%时其抗磨效果最佳，磨损率降低幅值达57%；在较高载荷下，添加0.0250%的碳纳米管能够使其摩擦系数减小约15%，但随着碳纳米管质量分数的增加，摩擦系数迅速提高；含碳纳米管润滑油的磨斑表面平整，划痕较细且分布均匀。

The influence of the defect on the torsional stiffness and the stress distribution are calculated and analyzed by finite element method. The defect widths range from one-tenth of the femur outer diameter(0.1D) to (0.3D), and defect lengths range from 1D to 5D.

计算结果表明：骨缺损长度为D时，对股骨扭转刚度和剪应力分布的影响较小；骨缺损长度从2D增至4D时扭转刚度急剧减小，而且剪应力的最大值位于骨缺损中心。

This paper introduced algorithmic method of light distribution design with the help of light distribution calculation and illumination of test points. It gave the detail about Ray Tracing and point by point arithmetic, presented a design tactic of multi-surface reflector.

从计算光形分布和测试点的照度值两方面介绍了配光设计的计算方法，具体运用了光线追迹法和逐点计算法，并给出了用于近光灯的多曲面反射体的一种设计策略

In order to improve the efficiency of grid generation, a two-boundary algebraic method based on transfinite interpolation was developed to generate two-dimensional grid system within geometrically complex two-dimensional plane domain rapidly.

为提高网格生成效率，提出了一种基于超限插值的双边界代数网格生成方法，可快速生成边界正交的贴体网格，引入几何一致性条件保证物理区域不变形，同时发展一系列拉伸方程控制网格分布。

In terms of Markov one step transition probability, we present Markov replacing method.

在此算法中我们假设在图像象素域中，每一列的象素值符合马尔可夫分布。

This paper, which focused on the structure optimization theory and method, has finished such studies as follows: The three dimension model has been built, which provide the necessary conditions for the building of the dynamics equivalent model. By the launch dynamics simulation, the loads of the key joints when the rocket is launched has been got, which provide the necessary data for the finite element analysis and the structure optimization. The finite element model of the excess weight parts of the rocket has been built, buy the finite element intension analysis of the model in two conditions, the displacement and the stress of the key points have been got, which make us know the distributing of the stress and the transmogrification of the part. To satisfy the intension and the precision design request and to decrease the weight of the part as many as possible, the part has been topology optimized by the structure optimization theory and method. After that, the new model has been analysis in structure and launch dynamics. The contrast of the character change of the old part and the new part and the influence on the rocket system have been studied.

本文以结构优化理论和方法为核心，主要做了以下工作：建立了某自行火箭炮全炮三维实体模型，为建立该火箭炮系统的动力学等效模型提供了必要条件，进行了发射动力学仿真，得到该火箭炮发射装置各关键连接部位在发射状态下的载荷，为有限元分析和结构优化提供了必需的数据；建立了该火箭炮发射装置超重部分的有限元模型，分两种工况，对模型进行了有限元强度分析，得出了关键部位的位移和应力值，对其的应力和变形分布有了具体的了解；运用结构优化的理论和方法，对该火箭炮发射装置超重部分进行了拓扑优化，使其在满足强度和精度的要求下尽可能多地减轻重量，对优化后得到的模型进行了结构分析和发射动力学分析，对比了该部件优化前后的特性变化以及对火箭炮系统的影响。

So, the study on circumferential δ〓C of tree rings is very significative.

因此，研究树轮δ〓C值角分布具有与年际变化同等重要的地位，值得深入研究。

The biomimetic furrow opener surface with UHMWPE tubular section ridges recorded equivalent stress of0.968×10~8Pa and stress distribution in direction of motion of0.166×10~8Pa as the lowest stresses values compared to the other surface designs of furrow openers.

ANSYS分析表明普通推土铲具有最高的等应力和最高的在运动方向上的应力分布，其值分别为1.30×10~8Pa和0.76×10~8Pa；等应力和运动方向上应力的最低值分别为0.241×10~8Pa和0.159×10~8Pa，发生于没有非光滑结构的超高分子量聚乙烯材料板表面。

The results show that the maximum unbalanced force and the displacement of monitoring points in the simulation tend to be stable.

研究结果表明，模拟过程中的最大不平衡力和监测点位移均趋向于稳定，塑性区分布情况和安全系数值则再次表明边坡在整体上处于稳定状态。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新