切线的

Mathematics: Understands and applies basic and advanced properties of the concepts of geometry; Use the Pythagorean theorem and its converse and properties of special right triangles to solve mathematical and real-world problems; Understands the basic concepts of right triangle trigonometry (e.g., basic trigonometric ratios such as sine, cosine, and tangent); Uses trigonometric ratio methods to solve mathematical and real-world problems (e.g., determination of the angle of depression between two markers on a contour map with different elevations); Uses properties of and relationships among figures to solve mathematical and real-world problems e.g., uses the property that the sum of the angles in a quadrilateral is equal to 360 degrees to square up the frame for a building; uses understanding of arc, chord, tangents, and properties of circles to determine the radius given a circular edge of a circle without the center

数学：理解和应用几何概念的初级和高级特性；用毕德哥拉斯定理、逆定理以及特殊直角三角形性质解决数学的和现实世界的问题；理解基本的直角三角形三角比；运用三角比方法解决数学的或现实的问题。（等高线图上的两个标记之间的俯角确定）运用形体之间的关系及其属性解决数学的或现实的问题（利用四边形内角和等于360度来为建筑物框架取正，运用弧，弦，切线和圆的性质确定缺少中心的一段圆弧的圆心

In this paper the sands＇ physics-mechanics properties were measured with the sample of northwest desert in our country, taking WTC5380TSM desert vehicle as the object studied the desert trafficability, presented the formulas of tangential tractive force and motion resistance, taking the pothook tractive force and the coefficient of traction as the evaluating indicator of trafficability.

淮阴工学院，江苏淮安223301摘要：以我国西北部沙漠为样地测定了沙土的物理一力学性质，以WTC5380TSM沙漠车为对象进行了沙漠通过性的研究，给出了切线牵引力和行驶阻力的计算公式，以挂钩牵引力和牵引性系数作为通过性的评价指标。研究表明，WTC5380TSM沙漠车在该沙漠中有较好的通过性能，能够满足交通运输作业的要求。

Increase of 47% in the unconned compression strength compared to increase of 26% in the secant modulus at the maximum stress level, 25% in the secant modulus at half of the maximum stress level, and 23% in initial tangent modulus.

这一变化的数额膨润土10日至15 ％，导致平均增加了47 ％的无侧限抗压强度相比增加了26 ％的割线模量的最高应力水平， 25 ％的割线模量的一半的最大应力水平， 23 ％的初始切线模量。

5The failure strains of cement-soil are calculated, and initial tangent modulusand average deformation modulus of cement-soil with same cement mixing content arecalculated. Then fit them with strength. The relation between ultimate deformationmodulus and strength, cement-soil of same curing period, is fitted too. The conclusionis that deformation modulus of cement-soil with some stock-still time are close to thesewhich compacted without stock-still time.

5计算分析了水泥土的破坏应变；计算了相同水泥掺入比水泥土的初始切线模量和平均变形模量，将它们与抗压强度的关系进行拟合，将同龄期水泥土的极限变形模量与抗压强度进行拟合，结果表明，一定静置时间的水泥土的变形模量与t=0h的水泥土的变形模量相差不大。

Based on the principle of surface development in differential geometry, the method of development for cone and tangent surface is given. Cone is developed in the unit ball way.

锥面的展开是利用单位球方法，确定直母线与平面上过定点射线之间的映射关系，进而展开曲面；切线曲面的展开则利用准线曲率在展开中的不变性，确定准线在平面上的展开曲线，再作与之相切的直母线，从而实现曲面的展开。

Theory; the spatial meshing theory includes comparative motion, comparative differential and conjugative curved surface; and the application of meshing theory includes gear drive and worm drive. The spatial meshing theory is the main part of the course.

课程的重点讲解内容有曲线的参数方程、切线、法面、弧长、曲率、空间曲线的基本公式、挠率及平面曲线的基本公式等；曲面第一和第二基本公式，法曲率、主方向和主曲率、欧拉公式、短程挠率、欧拉公式和贝特朗公式推广、相对法曲率和相对短程挠率等；刚体的绝对和相对运动速度、相对微分和绝对微分、相对速度和相对微分、轨迹曲面的法曲率和短程挠率等；空间共轭曲面的啮合条件、诱导法曲率、两类界限点、等距共轭曲面、空间啮合的二次接触原理等；蜗杆传动的数学模型建立及啮合特性分析方法等。

The result makes clear: EThe tensile strength of TFE film increases somewhat along with the addition of drawing speed, and rupture outspread rate reduces;ETFE to succumb filmily somewhat along with the addition of drawing speed the addition that intensity follows drawing rate and increase somewhat, but the 2nd succumb intensity increases not big;ETFE to succumb filmily meet an emergency follows drawing rate increase somewhat, the 2nd succumb the amount of tangent and stretch model that meet an emergency reduces;ETFE film somewhat and model of the 2nd flexibility measure those who follow drawing rate to increase show downtrend, quantity of secant flexibility model and quantity of the 3rd stretch model do not have apparent change.

结果表明：ETFE薄膜的抗拉强度随拉伸速度的增加略有增加，而断裂延伸率随拉伸速度的增加略有减小；ETFE薄膜的屈服强度随拉伸速度的增加而有所增加，但第二屈服强度增加不大；ETFE薄膜的屈服应变随拉伸速度的增加略有增加，第二屈服应变则略有减少；ETFE薄膜的切线弹性模量以及第二弹性模量随拉伸速度的增加呈下降趋向，割线弹性模量和第三弹性模量则没有明显的变化。

The periostea of both experimental and control side of the mandibular ramus were taken and prepared, 2 of each 5 rabbits in a group were prepared for HE stain detection and 3 for proliferating cell nuclear antigen immunohistochemical detection.Results:1, The newly formed bone was detected on the lateral aspect of mandibular ramus after periosteal distraction. The bone was shaped like a hill. It looked very low and was full of holes at postoperative day 28. With the time of consolidation period lengthened, the newly formed bone matured gradually. X-ray examination showed the new bone shaped like a hill. The average values of new bone height at postoperative days 28,35,42 and 56 were 1.86 + 0.15mm, 2.29 + 0.29mm,3.19 + 0.13mm and 4.70 + 0.45mm. Histological examination of both HE stain and picricacid-fuchsin stain showed the increase in the number of osteoblasts and the change in the orientation of collagen fibers and bone trabecula. There were no significant differences between newly formed bone and original bone on the lateral aspect of mandibular ramus at postoperative day 56 histologically.2 Compared with the control side, the distracted periostea proliferated obviously under the microscope, and the number of periostealcells increased with satiation of cellular nuclear per unit area. The images of PCNA immunohistochemical stain of periosteum showed that the experimental periosteum proliferated obviously after distraction compared with the control side.

结果：骨膜牵张成骨的实验研究南京医科大学硕{学位论文l、骨膜牵张后，可见下领升支外侧的骨皮质上有新骨形成，新骨呈山峰状凸起，术后第28天的新生骨较低平，多孔隙，随着固定时间的延长，新骨逐渐成熟；下领升支前后向切线位X线投照显示新骨呈山峰样隆起；经测量，术后第28、35、42和56天组平均新生骨厚度分别为x.86士0.15mm、2.29士0.29mm、3.19士0.13mm和4.70 土0.45mm；脱钙骨组织的HE染色和不脱钙骨组织的苦味酸一品红染色的组织学观察均显示了新生骨在成骨细胞数量上的增长，以及胶原纤维和骨小梁排列方向上的变化，术后第56天的新生骨在组织学上与原升支骨组织已无明显区别。2、HE染色显示，与对照组相比较，实验侧骨膜增生明显，细胞间排列紧密，单位面积内骨膜细胞数增多，细胞核饱满；骨膜PCNA 免疫组化染色显示，与对照侧相比较，实验侧骨膜在牵张后出现了明显的增生迹象，PCNA阳性细胞分布紧密，单位面积内阳性细胞数较对照组多，靠近骨表面的骨膜中的阳性细胞数更多而且分布更为紧密。

The position of said examine bed on scanning plane and its sag from its nominal position can be found out according to the tangent channel of X ray along the outside near bed back and the geometric structure of X-ray emitting and detecting unit.

在通过X射线照射和探测装置扫描安置在检查床上的受检者的X射线CT设备中，根据沿切线方向向检查床背侧附近外侧前进的X射线被探测的通道位置和X射线照射和探测装置的几何结构，找到检查床在扫描平面中的位置。

The type of the limit state function is set up according to the Mohr-Coulomb yield criterion which can consider the direction of the slip surface; and the derivatives of the stress to the basic stochastic variables of the slope are computed by using partial differential method based on the incremental tangent stiffness method and the accelerating convergence method of Aitken.

其中功能函数的形式是以考虑滑面方向的Mohr-Coulomb屈服准则来建立的；导数的求解采用的是基于增量切线刚度法及Aitken加速算法的偏微分法；边坡整体可靠指标取的是所有可能滑面的可靠指标的最小值。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了