查询词典 cluster sampling

Aiming at the problems of over-fitting and generalization for neural networks, the locally most entropic colored Gaussian joint input-output probability density function estimate is studied, and a new method by means of Chebyshev inequality is proposed to self-revise respectively according to every cluster.

针对神经网络的过拟合和泛化能力差的问题，研究了样本数据的输入输出混合概率密度函数的局部最大熵密度估计，提出了运用Chebyshev不等式的样本参数按类分批自校正方法，以此估计拉伸样本集，得到新的随机扩充训练集。

Given a finite training sample set, according to the proposal of establishing a Local Most Entropy probability density function to estimate the number of cluster a method for estimating 〓 is proposed, where a complicated method based on Maximum Likelihood Cross-Validation is replaced by Chebyshev inequality.

为改善BP算法的收敛速度慢、易陷入局部最小的问题，提出了带一类非线性特性动量项的变步长BP算法，构造了一个能自适应升降温的动量项非线性强度函数，在编程中又采用了有条件引入非线性特性动量项的措施，大大提高了搜索过程跳出局部极小、快速稳定收敛的能力。

In this study, we have explored the regulatory function of SATBl toβ-globin gene cluster at chromatin level.

我们的研究就要探讨SATB1在染色质水平上是如何调控β珠蛋白基因的表达的。

At first, this age-dating approach was used to estimate the age of G-dwarf stars with Th/Nd chronometry. Recently, it has been used to evaluate the age of halo field stars and globular cluster stars with the Th/Eu and U/Th chronometers.

这种方法最初是利用元素对 Th/Nd 来确定 G 矮星的年龄，近年来开始利用元素对 Th/Eu 和 U/Th 来确定晕族场星和球状星团内恒星的年龄。

If no one appreciates, the singing of the crow also similar to the skylark;Nightingale if miscellaneous sing in the cluster the goose of boisterous and clamorously in daytime, the somebody else will never think it sings than the wren more beautiful.

18-10、如果没有人欣赏，乌鸦的歌声也就和云雀一样；要是夜莺在白天杂在群鹅的聒噪里歌唱，人家决不以为它比鹪鹩唱得更美。

The class number k is one of the key factors to influence cluster quality in K-means algorithm.

在K-means算法中，聚类数k是影响聚类质量的关键因素之一。

On the Greek island of Santorini, a cluster of private homes rests along the 300-year-old cliffside ruins of an indigenous community.

在希腊桑托里尼岛的这个度假胜地，除了浑然天成的无敌美景以及优闲舒适的度假环境外，佩里沃拉酒店另一个让人流连忘返的地方是位于悬崖边的游泳池。

The forest was characterized with phanerophyte evergreen plants with single-mesophyll-leathery leaves, which reflected the nature of tropical Karst mountainous seasonal rain forest.(2). Community succession was divided into five stages by using Cluster method, PCA method; the succesion stages include herbaceous stage, scrub-shrub stage, small tree stage, arbor stage and climax seasonal rain forest stage.(3). Based on similarity theory, succession sere was constructed with the community similarity equation formed.

结果表明：(1)森林群落在外貌上，以常绿高位芽、单叶、革质、中型叶植物为主，反映了热带岩溶山地季雨林的特点；(2)运用聚类分析、PCA排序等方法将群落演替阶段划分为草本群落阶段、灌丛阶段、小乔木阶段、乔林阶段、顶极季雨林阶段；(3)运用相似学原理，组建群落间相似度方程并以此方程构建了群落演替系列；(4)研究表明桂西南岩溶区生态系统健康受到严重胁迫。

The study of industry cluster has reached its climax in the world.

在世界范围已形成了研究产业集群的高潮。

A general modeling structure of the system is established. Based on concepts of cluster and closed ball, an algorithm is put forward for multi-sensor multi-target data fusion and an optimal solution for state estimation is presented.

建立了炮兵系统多传感器信息融合模型的总体结构，在闭环和聚类概念的基础上，提出了一种简单可行的融合算法，并给出了状态估计的最优解。

He has to relate with three women in the movie, and yet remain implicitly faithful to the unseen Lucinda.

让克劳德布里亚里成功地饰演试验了一个难度很大的角色：和三个女人打交道，但还要底下对观众未曾谋面的卢馨达保持忠诚。

The experiment was conducted to study effects of inulin on the growth performance, indices of immune organs and serum immunoglobulin of laying chicklings as well as the performance of inulin which replaced the antibiotics in diets by adding 0.2%, 0.4% and 0.8% of inulin, respectively.

试验旨在通过在蛋用雏鸡日粮中添加0.2%、0.4%和0.8%的菊粉，研究菊粉对蛋雏鸡生长性能、免疫器官指数和血清免疫球蛋白的影响，以及菊粉替代抗生素对蛋雏鸡的应用效果。