数值算法

An improved real-code genetic algorithm is designed with different cross, selection and variation operators, aiming at overcoming its inherent shortcomings of premature, dead state convergence and weak mountain climbing during function optimization.

针对实数编码在进行数值优化时固有的过早收敛、停滞现象和弱的爬山能力等缺点，通过设计不同的交叉、变异算子，提出了一种改进的实数编码遗传算法。

After that an inverse kinematics medal is set up based on BP neural network. By choosing the Bayes algorithm, we use the Matlab neural network workbox to program, simultaneously provide simples in needed range. The test precision of the model can meet the need of the project in area of simple date provided by test and numerical model.

通过BP网络建立运动学模型，选择贝叶斯算法，采用Matlab神经网络工具箱进行编程，同时按照一定的范围要求提供样本，在试验及数值模型提供的样本数据范围内，得出模型测试精度都能满足工程要求。

This research results in a model and algorithm tailored for simulated WT.

通过本文的研究，形成了一套适用于数值试井的模型和算法。

From the numerical results it can beseen the efficiency of the improved method.

从数值试验的结果也可以看出改进算法的必要性。

Giving the more explicit boundary conditions and using Biconjugate gradients stabilized method to solve the linear algebra equation with large coefficient matrix, we get a fast algorithm of highprecision to calculate effectively electrical and magnetic fields in the whole space.

由于提出了简洁的边界条件，采用了解大型系数矩阵方程组的双共轭梯度稳定解法，所实现的三维交错采样有限差分数值模拟算法具有迭代收敛稳定、计算精度高、速度快等特点。

Fast Finite Element Algorithm ; Numerical Modeling ; Biphase Medium

有限元快速算法；数值模拟；双相介质

The result of the Ceil of one share numerical value that searchs road algorithm in the A* in the project below certain circumstance can make mistake, the most typical is the 29.0.ceil = 30 below the result of operation of right 29.0 Ceil is 30 but no matter how try in Console, cannot reproduce such circumstance.

在某些情况下项目中A*寻路算法的一部分数值ceil的结果会出错，最典型的就是下面的 29.0.ceil = 30没错 29.0 ceil运算的结果是30 但是无论怎么在console中尝试，都无法重现这样的情况。

Then, studying the theories and algorithms of Hidden Markov Models in detail, and discusses some issues in actual applications and gives corresponsive solution means to them. At last the functions of HMM used in cutting vibrations forecast are given.

第三章应用HMM中的Hterbi算法进行信号的数值滤波处理，讨论了振动信号的特征提取方法，以及幅值谱矢量的标量量化技术，最后提出了机床切削过程中的FFT-HMM颤振预报方法。

And what's more, a new definition of error is introduced for evaluation of the computation: The effect of Courant number, grid resolution and ratio of cell on numerical dispersion is analyzed too.

详细地研究了Courant数、网格分辨率CPW和网格长度比率等因素对于数值色散误差的影响，为基于Taylor差分格式的FDTD算法的研究提供了有用的参考。

By combining k-ε models with the wall function calculation method and using the SIMPLE method for programming,the flow field in exhaust facility ,which has a low pressure heater and pressure reducer and desuperheater in it,has been treated with three-dimensional numerical simulation and the velocity distribution of the flow field in exhaust facility is herewith obtained.

采用k-ε模型并结合壁面函数法，利用SIMPLE算法编程，对某具有内置式低压加热器和减温减压器的直接空冷汽轮机排汽装置的内部流场进行了三维数值模拟，得到了整个排汽装置内部流场的速度分布情况。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。