查询词典 convergence

Aiming at the disadvantage of conventional BP neural network, such as selecting parameter values by the empirical method, slow convergence speed and easy trap into local minimum points, this paper designs an improved BP neural network system. In order to improve the network convergence rate and reduce the training error, this paper optimizes the initial connecting weight value of neural network by the use of ant colony algorithm and trains artificial neural network by Levenberg-Marquardt algorithm.

针对常规BP神经网络参数的经验式取值方法以及收敛速度慢，容易陷入局部最小点等缺陷，设计了一种改进的神经网络系统，利用蚁群算法优化神经网络连接权初值，并采用LM算法对人工神经网络进行训练，提高了网络的收敛速度，降低了训练误差。

Results:① Thin-slice reconstruction, MPR and VR provided higher detecting rate of small peripheral pulmonary adenocarcinonia signs than conventional axial images, including lobulation, spiculation, pleural indentation and bronchovascular convergence;② MPR and VR was superior to axial thin-slice reconstruction in judging the presence of the vacuolar sign, air-bronchogram and bronchovascular convergence.

结果：①64层CT薄层重建、MPR及VR在显示肺小腺癌的分叶征、毛刺征、胸膜凹陷征及支气管血管集束征方面优于常规横断面；②MPR及VR对于空泡征、支气管气相和支气管血管集束征的判别有优势。

Theoretical analysis and a lot of practical examples show that the convergence of this algorithm is very stable, that its convergence rate is very fast, and that it can also give accurate calculation of the value of the pressure loss.

理论分析和大量实际算例表明这种算法具有非常稳定的收敛性和非常快的收敛速度，并且能够给出压降的精确计算值。

The new algorithm has better performance in stable convergence rate, convergence speed, and threshold sensitivity compared with traditional fuzzy clustering algorithm.

该算法在收敛稳定性、收敛速度、初值敏感性方面，相对于传统模糊聚类算法有了明显改善，相关实验表明，该算法具备高效、稳定的工程应用价值。

The results show that the present convergence rate of the India plate is 21.8 mm/a with a dipping 8.1°to the north. This is in good agreement with various geologic predictions of 18mm/a in past 2～3 million year implying a stable convergence rate of the India plate in a very long duration.

本文 结果与从地质推断的在过去2～3Ma时期内，印度板块向欧亚大陆俯冲速率平均为18mm/a，有较好的一致性，表明在较长时间内，印度板块向欧亚大陆俯冲的速率仍然是稳定的。

The Markov chain proved the algorithm that is strong convergence and also the convergence speed is exponent.

利用Markov链证明该算法是可收敛并且是以指数速度概率强收敛的。

Ensure global convergence of random PSO algorithm for high-dimensional functions is a strong global convergence.

保证全局收敛的随机粒子群优化算法，对于高维函数有较强的全局收敛性。

Compactness and the relation between strong convergence and weak* convergence.

紧性以及强收敛和弱收敛之间的关系。

By the way, we describe the modified quasi-Newton algorithm used the line search , and have given its global convergence and superlinear convergence.

接下来描述了采用线性搜索的修正拟Newton算法，并给出了它的全局收敛性与超线性收敛性。

Furthermore, the global convergence and superlinear convergence rate are proved under mild assumptions without the strict complementarity.

此外，在不需要严格互补的温和条件下，我们证明了算法的全局收敛性和超线性收敛性。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。