Influence of Reversed Tangential Air Admission to Aerodynamic Field in Boiler on Cold Test

Considering that it is more meaningful to know the acceleration components relative to a moving trace instead of those along longitudinal, lateral and normal axes of targets, a time-varying nonlinear state model describing tangential and normal acceleration maneuvers of targets in three-dimensional space is established.

建立了描述目标在三维空间中进行切向与法向机动的非线性状态模型。

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The curvilinear model set constructed by this method is only related to tangential acceleration and normal acceleration can be self-adaptive adjusted. In doing so, computation burden is reduced and the algorithm's application range is extended.

用该方法构造的曲线模型集只与切向加速度相关，法向加速度可自适应调整，这一方面简化了计算复杂度，另一方面扩大了算法的适用范围。

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At present moment, the equations of torpedo motion are based on constant thrust. In order to introduce tangential acceleration into the control of torpedo trajectory, equations with variable thrust have to be established.

目前的鱼雷运动方程是建立在恒推力基础上的，为了将切线加速度引入弹道控制，建立变推力方程是必要的。

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The tangential acceleration formula has been deduced and lateral guidance law has been given when the RLV flies along the trajectory of HAC.

根据航向调整段轨迹的数学描述，推导出了沿此轨迹飞行的速度变化规律，并给出了侧向平面内的制导规律。

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Do not confuse ever the tangential acceleration, which is along the circumference, with a centripetal acceleration.

但是别把这个切向加速度，它是沿着圆周的，和向心加速度混淆。

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A Derived Method of the Normal and Tangential Acceleration in Circular Motion

圆周运动中法向和切向加速度的引入方法

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Tangental point of a cubic Line AB is three times longer than Line CD.

三次曲线的切线割点AB线比CD线长三倍。

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Tangental point of a cubic 3-D Line. Line with a 3-D visual effect

三次曲线的切线割点三维折线图。带有三维效果的折线图

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Tangental point of a cubic

三次曲线的切线割点

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On this basis, the surface heating is predicted with the above methods. Surface pressure distribution is provided with the engineering methods such as Newton method, tangent-wedge/ cone method, and so on.

在此基础上，对于无粘流区，采用牛顿法、切楔/切锥法等工程方法确定物体表面压力分布，利用等熵条件确定边界层外缘参数；

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The unsteady state term was discretized using the full implicitly schemes. For the diffusion terms, the normal direction vector ( the first diffusion) and the tangent direction vector ( the second diffusion) were calculated by using the intersectant and iterative algorithm.

对于非稳态项采用全隐格式，对于扩散项，采用法向扩散项（一次扩散项）和切向扩散（二次扩散项）进行相互交叉迭代的算法。

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This paper discusses correspondence between homogeneous polynomial vector field of even degree Q ( x) in R3 and the induced tangent vector field QT ( x) of Q ( x) on S2 and some geometric properties of solutions. The nonexistence of limit cycles is proved.

本文讨论了偶次多项式齐次向量场和S2上的导出切向量场之间的对应关系和轨迹的一些几何性质，并证明了Q（X）不存在极限环。

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This dissertation presents a definition of general offset curve, which has fixed offset distance, but variable offset direction. The offset direction is defined by the local coordinate system, which is formed of the tangent vector and the normal vector of every point on the curve.

本文利用曲线上各点的切向量和法向量所形成的局部坐标系来确定等距方向，从而给出一种广义偏距曲线的新定义。

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A special kind of unabridged end conditions like wing is used in the interpolation of curves, it needs both radius of curvature and tangent vector perpendicular to chord line, and has been solved very successful by special processing.

其中一种比较特殊的完备边界条件是翼型条件，它要求在端点处有垂直于弦线的切线，并且具有给定的曲线半径；

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After the template and point cloud are matched, point cloud is sliced by some planes to acquire sectional data. Every plane of these planes is constructed by one theoretical edge point and its corresponding tangent vector.

配准模板与点云数据，根据匹配后模板中每一离散点及对应的切矢信息构建平面，利用其对点云数据切片获得二维截面数据。

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The tangent vector at every data point is identified through the localized quadratic spline function at first. The tangent vectors and data points approximately determine the shape of the four spline curve.

首先用二次样条函数方法局部化地在每个数据点处确定一个切矢量，数据点和切矢量大致决定了四次样条曲线的形状。

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Hence, fairing a C~ 1 cubic spline curve with endpoint ( position and tangent vector) constraints will eventually lead to a cubic Hermite curve.

因此，光顺一条具有端点（位置和切矢）约束的C~1连续的三次样条曲线时，最终会得到一条三次Hermite曲线。

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We discuss three important aspects: preprocessing of gait image, feature extraction and classification. We emphasis on silhouette segmentation algorithm and silhouette description using Tangent Vector Descriptor.

本文论述了构成步态识别系统的步态图像预处理、特征提取、训练识别三个方面内容，重点讨论了图像预处理轮廓分割算法和以切向量描述的轮廓特征提取技术。

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The mathematical representations of space curve in mathematics have many forms, and the means by which to get the tangent vector varies according to the various representations.

空间曲线的数学表示形式有多种，而不同的表示形式，求其切线向量的方法也不同。

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According to the calculation theory, the tangent vector, the velocity and the normal vector on a given point of the circle of tool nose are coplanar.

根据此原理，摇盘回转时，刀尖圆上给定点的切线向量、绕摇盘回转的速度方向和法矢这三个向量共面。

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