查询词典 group representation

Stratified sampling design is applied in obtaining an accurate representation of the population by grouping the data into nonoverlapping groups, for example gender or income level, then selecting a simple random sample within each group.

分层抽样是将总体分成若干个组分，在每个组分中进行简单随机抽样，其原则在于将类似的样本归在一个组里面。

Group portrait of Noblewomen is a classic representation of china's ancient people,and in particular, the noble women of the Tang Dynasty, Yang Mian has changed the original ancient noble women into today's fashionable ladies in his painting, while remaining true to the traditional structure and colors of the classical painting.

簪花仕女图》是以描绘唐代贵族妇女为主的中国古代人物画的经典作品，而杨冕除了保留画面构图和大的颜色基调以外，将古代贵族妇女换成了出现在今天的大街小巷中的时髦女性。

Based on the literature about underachievement, the representation state of senion students is studied in detail with the methods of group tests; and the method of the case-study is used to make careful analyses of the six cases and put into practice. There are four parts to present the case-study in the thesis.

本文在对学业不良的研究文献进行综述的基础上，采用团体测试方法对高中学生进行了调查；采用个案研究的方法对6个中学化学学业不良学生进行了有关分析转化的研究实践。

Firstly, population partition methodology is presented by combining characteristics of both the cooperative co-evolutionary genetic algorithm and the neural network. Secondly, a novel mixed encoding method is also put forward to perform synchronal optimization of structure and weights of the neural network. Proper crossover and mutation operators were designed based on the encoding method. Next, a novel structure optimization technique is given according to the relationship among encoding, representation and cooperative group. Representative individual selecting and fitness evaluating are given.

首先，结合合作式协同进化遗传算法本身特性和神经网络特点，给出种群分割方法；其次，为了实现结构和权值的同步优化，提出一种新的混合编码方法，并根据该混合编码方法设计新的交叉和变异算子；然后，根据编码结构、代表个体和合作团体之间的关系，提出一种新的结构优化方法；再次，给出进化过程所需代表个体选择、适应度构造方法等。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。