查询词典 genetic

The genetic diversity of 76 waxy barley landraces from different region of China was assessed by SSR markers,and cluster analysis was done based on genetic similarity coefficient.

利用SSR标记对来自中国不同省市的76份糯大麦种质的遗传多样性进行分析，并以遗传相似系数为基础进行聚类分析。

In order to investigate the molecular genetic basis of grain qulity and find useful information for genetic improvement to grain quality, molecular maker linkage map was construct with DH population derived from "Nong xi110×Nong xi531","DH8×DH40"and"DH86×Shen 137"by SSR markers;then 83,38 and 44 DH lines were analysised and identified for grain quality;in the end quantitative trait lociassociated traits related grain quality were identified and analyzed in this study.

本研究利用SSR标记构建基于组合&农系531×农系110&(农单5群体)、&DH8×DH40&和&DH86x沈137&的分子标记连锁图谱，并对该三个群体的83个、38个和44个DH株系的籽粒品质性状进行了分析和鉴定，以探索控制籽粒品质性状QTL位点与遗传效应，为玉米籽粒品质性状的遗传改良提供理论依据。

In this paper, the application of SSR molecular marking in cotton genetic mapping construction, genetic diversity, variety identification and seed purity testing, accessorial breeding by molecular marking were introduced.

对SSR分子标记在棉花遗传图谱构建、遗传多样性测定、品种鉴定、种子纯度检测以及标记辅助育种等方面的应用进行了介绍，为该技术在棉花遗传育种中更好的应用提供理论参考依据。

Sodium pentachlorophenol can induce chromosome aberration of CHO cell,and is a non-genetic or weak-genetic mutagen.

五氯酚钠能诱发中国仓鼠卵巢细胞染色体畸变，是非基因致突变物或弱基因致突变物。

This dissertation fistly introduces appearance, definition, development process, functions and status of MES, also analyses methods and existent problems of MES production scheduling; as follow, in the background of CY_MES (a enterprise's Manufacturing Execution System), introduces main function and buildup of its support platform– SIMATIC IT, and whole structure of CY_MES; afterwards, for special production instance of the enterprise, designs production scheduling system software structure, function structure, data structure of order and entry and realization of silk production and packing production scheduling based on SIMATIC IT; finally, after contrast of many modeling methods and careful research of silk production flow of the enterprise, selects Petri net to model the silk production scheduling, for the sake of avoiding many error chromosomes, improves on the basic genetic algorithm, uses sigle unit genetic algorithm to optimize the Petri net model, lists the contrast of scheduling results.

本文首先介绍了MES的产生、定义、发展历程、功能及其发展现状，同时也分析了MES生产调度问题的各种解决方法及其存在的问题；接着以CY_MES为背景介绍了其支撑平台——SIMATIC IT平台的功能及其各组成部分，以及CY_MES的SIMATIC IT整体解决方案；紧接着在SIMATIC IT平台基础上，针对该烟厂的生产实际情况，设计了CY_MES生产调度系统的软件结构、功能结构、工单和子工单的数据结构和制丝与卷包生产调度的实现方式；最后，在比较了各种生产调度建模方法的利弊和对该烟厂制丝生产工艺流程深入研究后，利用Petri网建立了制丝生产调度模型，为了避免大量无效个体的出现，对基本遗传算法进行了改进，采用单个体遗传算法对这个Petri网模型进行了优化，并给出了调度结果的对比。

Combined the genetic algorithm with least square method and based on the result of least square method to synthesise plane-wave,we use the genetic algorithm to optimize plane wave by seeking the best amplitude and phase of element of array.

测量精度的高低直接取决于该平面波的质量，平面波质量越好则测量精度越高[1]。因此，寻求一种最佳算法使综合出的平面波质量越好，对近场测量系统显得尤为重要。

There is probably a genetic contribution, particularly in genes controlling the level of immune response – although genetic susceptibility is likely to be linked to an environmental factor, some possible factors including vaccination or exposure to silicates.

有可能是遗传的贡献，特别是在基因控制水平的免疫反应-尽管遗传易感性可能是与环境因素，一些可能的因素，包括预防接种或接触矽酸盐。

This paper reviews plant regeneration, genetic transformation and genetic improvement of carnation.

本文对香石竹的再生体系、遗传转化体系及其分子育种现状作了较为系统的总结。

We show that over timescales ranging from 500～10000 years, allele frequency data for polymorphic allozymes reveal a consistent loss of genetic diversity along invasion routes, confirming the role of glacial refugia as centres of genetic diversity over these timescales, and that populations in the invaded range are more subdivided genetically than those in the native range of each species.

从500～10 000年的时间尺度上，多态的等位酶位点上等位基因频率的数据表明：1）遗传多样性沿入侵路线呈不断下降的趋势，支持了冰河期避难所作为遗传多样性中心的作用；2）入侵地区的种群与该物种原产地的种群相比，遗传上的分化更为强烈。

The dissertation recommends some kinds of methods and measures: such as adjusting the network configuration, connecting value and threshold value by the total value of all stylebooks, adding part of the adjusting value of the last time to the current adjusting value, transforming the stylebooks to standard value, optimizing activation function, appending threshold value to the putout of the nerve cell and so on. Simultaneity, the author brings forward a new method to optimize the model of artificial neural network . It is using the automatically adaptive genetic algorithm to make the network configuration, connecting value and threshold value of artificial neural network better. The method can make the model better and improve the simulating effect and forecasting precision.Genetic algorithm is an arithmetic based on evolution and genetics used to search the optimization .

本文针对人工神经网络应用中存在的上述问题，介绍了各种改进方法与措施：如用所有样本的总效果对网络权值矩阵和阈值向量进行调整、调整量中加入动量项、标准化训练样本数据、优化激励函数以及给神经元的输出值添加偏置量等；同时还提出了一种新的优化人工神经网络模型的方法，即采用自适应遗传算法对人工神经网络模型的网络结构和权值阈值进行全局优化搜索，以提高大坝安全监测人工神经网络模型的拟合成果和预测精度。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。