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The approach preserves linear of perimeters of curves blending sequences, and it fits general curves blending and skeleton moving.

该方法在曲线形状渐变序列中具有保周长的线性变化，适合一般曲线的渐变和骨架行走的特征。

Firstly, the formulas of continuous profile curves are educed from the formulas of the cutter profile curves, so the profile of helical gears can be fast and accurately created.

修形技术对提高齿轮箱传动性能有重要意义，而齿面偏差和轴线偏差是对齿轮强度产生影响的误差因素。

To make the transition curve in the process of gear modeling be more reasonable, the parameterized 3D model of involute cylindrical spur gears with whole profile was made with Pro/Engineer software, based on the study of equations of the dual-arc rack cutter＇ s profile curves and the cut gear＇ s tooth profile curves.

为了使齿轮建模时过渡曲线部分更符合工程实际，在对双圆弧齿条型刀具轮廓曲线方程和齿轮的廊线方程研究的基础上，利用Pro/Engineer软件建立了可变位的渐开线完整齿廊直齿圆柱齿轮的三维参数化模型，并对齿廊曲线连续性进行了分析。

Through the analysis of the formation principle of helical curves , the uniform equation of taper surface helical curves is established and the optimization analysis is made of the screw wing cutting edge of the taper spiral auger s tip .

通过分析螺旋线的形成原理，建立了锥形面螺旋线的统一方程，并对圆锥螺旋钻尖的翼片刀刃部分进行了优化分析。

Tests were carried out using ±1 000 kV simulation tower in this paper, and switching impulse and lightning impulse flashover characteristic curves of typical air gap in ±1 000 kV transmission tower were obtained. These curves were compared with test results of ±500 and ±800 kV air gap, and the flashover characteristic of 750 kV AC transmission tower and square tower window were also discussed in this paper.

利用±1 000 kV模拟塔头进行试验，得到了±1 000 kV杆塔典型空气间隙的操作冲击和雷电冲击放电特性曲线，并与±500和±800 kV杆塔塔头的空气间隙研究成果进行对比分析，同时结合750 kV 交流杆塔塔头和正方形塔窗的操作冲击特性进行了讨论和分析。

At the meeting point of the curves, it'sworth using the Snap to curves Tool

将点使用吸附功能吸附到曲线。

The results showed that the three straight lines model could fit the soil shrinking and swelling characteristic curves well. The characteristic values of the curves were smaller than 1. This indicated that during the processes of soil swelling and shrinking, the change of the soil specific volume was smaller than that of the soil water content. Values of the geometry factors of four soils studied were equal to 1 at the beginning of shrinking, less than 3 and greater than 1 at other swelling-shrinking phases. The geometry factor values in different phases showed that soil swelling-shrinking was anisotropic and only subsidence occurred at the beginning of shrinking.

结果显示：三直线模型能够很好地拟合4种土壤的收缩、膨胀过程；土壤收缩、膨胀曲线各段的特征值均小于1，这说明土壤胀缩过程中土壤容积的变化速率小于含水量的变化速率；4种土壤胀缩过程中几何因子r大于1而小于3，且收缩初期几何因子r等于1，表明土壤的胀缩是各向异性的，并且在土壤收缩的最初阶段只有垂直收缩。

The diurnal variation curves in winter and spring present marked saddle shapes , and the change of curves shape is not obvious in summer and autumn .

冬，春季的日变化曲线呈&U&形，且曲线形状的变化不如夏，秋季大。

Some said we as Chiropractors could only stop the progression of curves, and some even questioned the reason why curves needed to be corrected.

有的说作为按脊师，我们可以抑制椎曲的进展，有的甚至置疑椎曲为什麼需要矫正。

After the axial profile curves of back shroud are determined, the iterative formulae for calculating the curves of front shroud of impeller are derived in such a way that the flow passage area of the impeller profile varies with the middle curve of passage L linearly.

在确定叶轮后盖板的轴面流道曲线后，从过流断面积F沿流道中线L线性变化出发，推导出前盖板曲线的离散迭代公式。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。