approximate estimate

A simple approximate equation has been proposed in this paper. It can be used to estimate the bond dissociation energy of the covalent bond in conjugated systems from the π-bond order computed through the HMO methed.

本文提出一个由HMO法计算π键级的估算共轭体系中键离解能的简易近似公式。

The WDA ( acronym of Wavelet, Detail and Approximate) cross-correlation method based on wavelet transform was developed in consideration of measuring ultrasound echo signals to reduce the effects of noise, template window sizes and flaws on the time delay estimate using cross-correlation methods.

为了消除噪声、模板窗口大小和缺陷特征等因素对相关法时间延迟估计的影响，结合检测超声回波信号的特点，提出了基于小波变换的相关法时间延迟估计方法。

Monte Carlo method has been developed to estimate the chain propagation constant and exchange reaction constant. In average, one exchange reaction will occur after approximate six monomer molecules insert into the growing chain.

应用Monte Carlo方法模拟聚合反应中链增长和链交换反应速率常数，结果表明每一个活性中心接受约6个单体插入后发生链转移反应结束该聚合链增长。

This estimate is based on solving a local generalized Stokes problem, using the space of discontinue quadratic bump functions to approximate both velocity and pressure errors.

以非连续二阶鼓包（bump）函数空间为速度、压强误差的近似空间，该估算基于求解当地单元上的广义Stokes问题。

To simplify the computation, the estimate equations of trajectory parameter of boost phase, crossover phase and maneuvering phase in ballistic missile's flying were brought out by approximate treatment according to the motion equation of mass center for missile in this paper.

为简化计算，根据导弹的质心运动方程，通过近似处理导出了导弹机动飞行中助推段、跨越段和机动段弹道参数的估算公式。