查询词典 approximate calculation

Approximate theoretical calculation model was determined for quantum wires on nonplanar substrates, with which the lateral effective width of quantum wires was estimated.Ⅵ.

五、确立了适用于非平面衬底上的量子线的理论计算近似模型，并用之估算量子线的横向有效限制尺寸。

In aim at the complicity and high-dimensional state-space for the controlled system, it simplifies the calculation of geometric polytope by optimize with ellipsoidal approximate techniques, and the robust control effectiveness near to the optimal.

本论文所提示的基于几何理论的约束非线性控制算法是建立在最大输出允许集合的基础上，运用状态空间的有界子集表达鲁棒时优离散时间控制问题的价值函数，通过逆序计算该价值函数的水平集合，求得其所需的控制量，针对被控系统的复杂性及高维状态空间问题，运用椭球近似技术予以优化，使得几何多面体的计算得以简化，且鲁棒控制效果接近最优。

Although the EPRI give a set of the approximate engineering solution method, actually the crack of parts in engineering project mostly presents inner 3D effect. If using 2D elastic-plastic or 3D elastic analysis, the result can't be precise. Because these methods have neglected the reassignation of the stress and strain which happened at nearly the top of cracks, carrying on 3D elastic-plastic analysis and J-integral calculation become the foundational work to study the expander and safety assessment of the pressure vessel cracks.

虽然EPRI给出了一套近似的工程解法，但实际上工程中构件的裂纹大多呈现内在的三维效应，若使用二维弹塑性或三维弹性分析必然不够精确，因为对裂纹的&等效&二维表达忽视了发生在靠近裂纹端部的应力和应变的再分配，所以对压力容器裂纹进行三维弹塑性分析及其J积分是研究压力容器裂纹扩展和安全评定的基础工作之一。

On the basis of analyzing the blastingcharacteristics of rock at bench top in multi-row bench blasting, this paper puts forward a calculation model, deducces an approximate formula for calcualtion of reasonable stem length for multi-row bench blasting, which can be as reference for blasting design.

在分析台阶多排孔爆破时台阶顶部岩石爆破特点的基础上，提出了多排孔台阶爆破堵塞长度计算模型，从而推导出计算合理堵塞长度的近似公式，可供爆破设计时参考。

The thesis introduces an equal difference between an approximate value and an accurate value waY for panel point's coordinate calculation of the irregular curve by means of tangent line's approaching;illustrates it with a concrete example;and falls back on MATLAB mathematic software to draw an imitation picture of cutting tools' locus.

介绍一种用切线逼近非圆曲线节点坐标计算的等误差法，结合实例，借助M ATLAB数学软件，绘制出刀具轨迹的仿真图。

On base the three basic approximate of the ab initio, the calculation mode was obtained.

详细论述了从头计算法在物理模型上的三个基本近似，设计了相关的计算模型。

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。