三形

First of all, the structural analysis under the action of random loads is carried out and the mean value and variance of all joint's displacement and bar's stress in the structure are obtained by means of three fundamental equations (equilibrium, physical and geometric) in structural mechanics, as well as the property of moment of random variable.

通过引入可靠性安全系数，并利用结构力学的三个基本方程，将结构的位移和杆件应力可靠性约束等价显示化为设计变量的线性函数，使原基于可靠性的优化模型转化为常规的序列线性规划问题，利用修正的单纯形法求解。

Has entered the flowering period of strong ginkgo tree, spur on the shape of the three can be seen traces of traces of the bud scales linear scar, kidney-shaped scar that leaves marks, circular scar is spent stalk marks.

已经进入开花结实期的银杏树，短枝上可以见到三种形状的痕迹；线形痕是芽鳞痕，肾形痕是叶痕，圆形痕是呆柄痕。

Using this scheme, we successfully produced a triple recessive line for genes ch, nlw (non-lepis wing) and b-t on the 13th linkage group and a double recessive line for genes nb and ki-2 (kidney-shaped egg 2) on the 19th linkage group of Bombyx mori.

采用所设计的方案，成功培育了家蚕第13连锁群的赤蚁、无鳞毛翅和褐色卵t (b-t，母性影响遗传)的三隐性系统，并培育了第19连锁群的狭胸和第二肾形卵(ki-2，母性影响遗传，待定位突变基因)的双隐性系统。

Result Among the 1st principal components, the positive weight value of chest diameter was greatest and it was the eigenvector with greatest influence on the 1st principal components. Among the 2nd principal components, the character loading value of leaf-lobed width and the positive weight values of angle between leafstalk and its branch and leaf-shape index were greater. Among the 3rd principal components, the positive weight values of leaf number, branch length, branch thickness and developed degree of crown size of 1 year old branches were greater.

结果］在第一主成分中，胸径的权重正值最大，是对第一主成分影响最大的特征向量；在第二主成分中，叶裂宽的特征负荷值较大、叶柄与着生枝夹角和计形指数的权重正值较大；在第三主成分中，一年生枝的叶数、枝长、枝粗和冠幅发达程度的权重正值较大。

The numerical simulation showed that the condition for the stability of the collinear libration ponts can be used to the satellite formation.

通过数值模拟说明限制性三体问题秤动点的条件稳定运动可以为小卫星星座保持相对几何构形提供一种解决途径。

This paper researches the part third-order contact condition of tool and the surfaces by the contact principle of deferential geometry in to the 5-axis NC machining and analyzes the contact degree of the intersection line of the cutter and the surfaces.

运用微分几何中的切触原理，研究了在多轴数控机床中铣刀铣削圆与零件曲面的切触条件和局部坐标系下的局部三阶切触条件，并用截形对铣刀铣削圆与曲面的贴近程度进行了分析。

Under a row of five coiled spring housebells a curvilinear rope, stretched between two holdfasts athwart across the recess beside the chimney pier, from which hung four smallsized square handkerchiefs folded unattached consecutively in adjacent rectangles and one pair of ladies' grey hose with Lisle suspender tops and feet in their habitual position clamped by three erect wooden pegs two at their outer extremities and the third at their point of junction.

42那是一排五个家用螺形弹簧按铃，下面，在烟囱那凹进去的间壁两侧的两个钩子之间，弯弯地横系着一根绳子，上面挂着四块对折的小方手绢：一块挨着一块，彼此并不重叠，呈长方形。另外还有一双灰色长统女袜，袜帮是用莱尔棉线织的，脚脖子以下是通常的样式。两端各用一个木制直夹子夹起，第三个夹子则夹在胯间重叠的部分。

Multiple-channel percutaneous nephrolithotomy was carried out for 38 cases of staghorn or multiple renal calculi,of which 32 were treated via bi-channel approach while the remaining 6 via tri-channel approach.68 times of lithotomy were performed with the stone clearance rate above 84%.

总结1990～1996年38例鹿角形或多发性肾结石病例，采用经皮肾多通道穿刺取石方法，共作双通道穿刺取石32例，三通道穿刺取石6例，取石68次，疗效满意，结石清除率达84％以上。

The author gives two methods to specify the scale interval by using fitting of three—broken—line as well as statistical hypothesis testing based on the estimate of the derivative of the double logarithmic curve.

由于实际动力系统的混沌吸引子其自相似性只能在一定的尺度范围内存在，文中给出了两种无标度区间的确定方法以正确地估计吸引子的分形维数，即三折线拟合方法和通过直接估计双对数曲线上每一点的导数并利用统计假设检验方法确定合理的无标度区间。

The computational algorithm in every case is a tridiagonal matrix system amenable to efficient inversion methods.

所有情形都是便于反演的三对角形矩阵。

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