查询词典 population parameter

In the HGA , heuristic algorithm is used to produced initial population , self-adaptive parameter are used in copy operator, crossover operator and mutation operator .Simulated annealing algorithm is also cited ,and only some excellent chromosomes are operated by SA . In this way, HGA could improve its search ability at cost of a little more run time.

混合遗传算法在产生初始种群时引入启发式方法，采用自适应遗传参数和交替使用两种交叉算子；在搜索方式中加入模拟退火机制，采用只对部分优秀染色体进行退火操作的新策略，这样在保证增强寻优能力的情况下尽量减少运算量。

MODEL MAIZE SELF-LINE POPULATION GENETIC PARAMETER.

模型；玉米自交系；群体；遗传参数

Aimming at the small sample of strapdown inertial measurement unit successive test data, a random weighting method is used to get the prior distribution function of population's parameter with the known prior information under the situation that the parameters' format of general distribution is unknown.

针对捷联惯性测量组合历次测试数据小样本的特点，在总体分布参数形式未知的情况下，根据已有的先验信息，提出了通过随机加权法，获得捷联惯组历次测试数据总体参数的验前分布。

In this dissertation, An improved adaptive genetic algorithm for robust test generation is presented, which adaptively adjust genetic parameter with evolution effect and the choice of initial population is based on the feature of the robust test.

本文对标准遗传算法进行了改造，提出了一种自适应遗传算法来解决强健时滞测试生成，该算法建立了根据进化程度调整群体尺寸的启发策略来加速测试生成，并且在初始群体的选择上充分利用了强健时滞测试的特点以取得优良的初始群体。

Aiming at the premature convergence of the simple genetic algorithm, variance parameter genetic algorithm , which is based on the diversity of population, is proposed.

该文针对基本遗传算法所存在的缺陷——早熟现象进行了分析，并在此基础上提出了基于种群多样度的变参数遗传算法。

Besides, this paper is based on the data of the population censes in 2000 with the total fertility rate as the controlling parameter, using PEOPLE and EXCELL to make an analysis of the trend of the oldest- old in China. The result of this analysis demonstrates that the oldest-old is increasing at the fastest rate in China, which has become a block in the development of China.

本文还以中国2000年人口普查数据为基础，以总和生育率为调控参数，在一定的死亡水平之下，采用People和Excell对中国高龄老年人口进行趋势分析，预测结果表明，中国高龄老年人口仍然是增长最快的人口群体，其问题的严重性已不言而喻。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。