查询词典 algorithms

Set cover greedy algorithm is one of the commonly used algorithms for the test set problem. It is an open problem if the approximation ratio 2ln n+1 directly derived from the set cover problem can be improved.

集合覆盖贪心算法是测试集问题的一个常用近似算法，其由集合覆盖问题得到的近似比21nn+1能否改进是一个公开的问题。

The property of the algorithms on linear problems is studied and the Broyden's methods have been proved that they are not descant. More precisely, the distances between the sequences obtained by solving the linear problems and the solutions of the linear problems do not decrease under any vector norm.

笔者研究了将该方法用于求解线性方程组时的内在性质，否定了一个自然的推测，指出它在解线性方程组时不是一个下降的算法，即所得到的点列与方程组的解之间的距离在任何向量范数意义下都不具有单调下降性。

In allusion to the defect of grads descension of traditional back propagation network algorithms, some improving measures such as adaptive learning and additive momentum has been taken, and better application result is acquired.

针对基于梯度下降法的BP网络存在的学习效率低、收敛速度慢、易陷于局部极小状态、网络的泛化及适应能力较差等缺陷，采用了附加动量法及自适应学习率、合理选择激励函数等策略对算法中的缺陷给出了改进措施，取得了较好的应用效果。

The normal hybrid genetic algorithms include genetic algorithm combined with steepest descent method and simulated annealing genetic algorithm.

常见的混合遗传算法有遗传算法与最速下降法相结合、遗传算法与模拟退火法相结合。

Moreover, a new fast learning method of fuzzy systems both are based on genetic algorithms and gradient descent method is proposed.

引 言最近几年来，诸如模糊推理、模糊建模、模糊逻辑控制器等模糊系统得到了广泛的研究和应用。

Currently, the learning algorithms for training Feedforward Multilayer Neural Network can be classified into two categories: gradient descent method and layer by layer optimization method.

目前前向神经网络的学习算法主要分为两类：梯度下降算法和逐层优化算法。

And in this paper, it introduces the algorithms used in the system and designing of system in detail.

文中对该识别系统中所用的算法以及系统本身进行了详细的介绍。

There is no effective way to change the behavior of Standard algorithms as desired.

没有有效的方法来改变标准的算法所需的行为。

Different watermarking algorithms are proposed to improve the detectability and the robustness. Experiments and analyses are performed for each algorithm in detail.

根据不同的方案模型，提出了具有较强检测能力和鲁棒性的新的水印算法，并对算法进行了大量的试验仿真和性能分析。

Due to export restrictions, some encryption algorithms will not work in determinate countries.

由于出口限制，一些加密算法，不能在国家的有期徒刑。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。