近似计算

Most of previous segmentation approachs make use of the surface curvatures or the approximative polynomial coefficients which are very sensitive to noise, but the mathematical morphological operations are robust, so another main advantage of our scheme is its good noise immunity.

以前的大多数分割方法都使用表面的曲率或近似多项式的系数，表面的曲率或近似多项式的系数的计算对噪声很敏感，而数学形态学运算具有较好的抗噪声性，因此我们的方法的另外一个优点是它具有良好的抗噪声性能。

The force equilibrious equation and the approximate plastic conditions are set up,solved using the boundary condition and the strenth static coefficient σ/σs of fixed cycles short core when the tube is drawn so calculating the drawing force at every pass.

建立近似的力平衡方程，近似的塑性条件。应用边界条件联解上述方程，求出固定圆柱形短芯头拔管时的应力状态系数σ_拉/σ_S，以计算各道次的拔制力。

When calculating sensitivities matrix, instead of computing 3D sensitivities, we attempt to compute 1D sensitivities. Since the sensitivity elements of nonstations are zero, which should be nonnegligible values, we adopt a method of approximation.

在计算灵敏度矩阵时，吸取近似灵敏度矩阵思想，采用一维灵敏度矩阵来代替三维灵敏度矩阵，并对非测点的灵敏度元素提出一种近似方法。

Calculation of Attitudes and Positions in MSBS use simple geometry method, which is less complex and timelier compared with traditional method.

磁悬挂天平的位姿计算采用简单几何近似方法，与传统计算方法相比，位姿信息计算的复杂性降低，实时性得到保证。

The results show that the tilted rough ground generates cross polarization in the scattered signal, and reduces the copolarized signal.

计算结果表明，对于水平粗糙地面，相干叠加近似在高频和低频时同极化散射系数都有明显的后向增强现象，树的独立散射近似在高频段也有后向增强现象，这是由于枝干与地面以及枝干之间散射场在后向相干引起的明显增强。

The in-depth analyses and simulation calculations of two simplification methods are carried out in this paper. Then it is pointed out that the equivalent d- and q-axes damper winding model is not suitable for calculating the internal short circuits because the concept is not applicable in this situation, and the errors caused by it are too obvious to be accepted in electrical engineering; while the approximate damper cage model is acceptable since it not only meets the accuracy requirement of electrical engineering but also saves calculating time for computers.

本文对阻尼回路的2种简化方法进行了深入分析和仿真计算，指出等效d轴和q轴阻尼绕组模型应用于电机内部短路计算时，物理概念上存在缺陷，且会造成过大的误差、在工程上无法容许；而近似阻尼笼的处理方法既能满足工程精度要求，又可节省计算时间。

The caustics phenomena of electromagnetic wave propagation in concave reflector, the singularities of caustics, and the method of

40174032的一部分，得到如下结果：论文分析了利用Maslov方法求解非均匀介质中波动方程高频近似解的基本原理和求解过程，构造了介质系数只在一个方向变化时波动方程高频近似解的通用计算公式。

A method to make Credal network approximation inference is proposed by computing the joint probability distribution and posterior probability of variables through the above operators.Furthermore its arithmetic is developed by SQL statement.Its validity and efficiency can be showed in the application case.

提出利用上述操作计算Credal网络中各结点联合概率分布和后验概率的方法，从而实现了Credal网络的近似推理，并给出了该近似推理的SQL语言实现算法，算例结果表明该方法是有效的。

In order to contribute to analyse and compute easily setback moving devices on the projectile fuzes,and to make the fuze devisers be able to get the approximate acceleration curves with a few parameters such as tube length and muzzle velocity of the guns,the displacement-time curve and velocity-time curve of gun interior ballistic are fitted with the Logistic models,then the formula of projectile acceleration curves in bore are gotten by the derivation of the formula of fitting velocity-time curve.

为了便于炮弹引信后坐运动机构的分析和计算，能使引信工作者只根据身管长度和炮口速度等少量参数就能获得弹丸膛内加速度近似曲线，运用Logistic函数拟合火炮内弹道的位移－时间曲线和速度－时间曲线，再对拟合得到的速度－时间曲线求导便得到了弹丸膛内加速度近似曲线。

Conventionally only experienced nutritionists or dietists have the knowledge to evaluate the similiarity of foods manually. Based on the proposed vector space models, we can approximately solve this problem automatically.

延伸向量空间的想法，我们提供自动且具科学规则化的计算近似性方法，以往需仰赖营养师长年的经验才能判断食品之间的近似程度，已可透过电脑进行迅速正确的比较分析。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。