查询词典 optional selection

The operation condition of a series-resonant converter is equivalently analyzed under open-loop condition. OCC condition and selection basis of resonant parameter and switching frequency are determined. The relationships between LED number, transformer turns ratio and constant current error are also determined, which provide scientific basis for the selection of LED number and transformer turns ratio.

文中通过对串联谐振变换器开环工作状态的等效分析，确定开环恒流条件和谐振参数与开关频率的选择依据，以及LED数目、变压器变比与恒流误差之间的关系，为LED数目及变压器变比的优化选择奠定了理论基础。

This paper studied on domestication of plantlets in tissue culture and rapid propagation of Dendrobium loddigesii Rolfe which dealed with the different medium composed of gravel, rotten soil, perlite, turves, sawdust and china clay, in the different light intensity and temperature. The results showed that the best selection of medium on the domestication was 10cm gravel in bottom, rotten soil + sawdust + perlite,(5:1:1) in the middle part ,5cm greenness bryophyte on the surface.the best selection of medium on the transplantaion of plantlets in vitro of bramble,and light intensity was employed harf overshadow by adumbral net,temperature confined 14℃－28℃.

本文研究了环草石斛组培苗炼苗的影响因素如光照强度，温度以及基质等，初步获得环草石斛组培苗炼苗生产技术：能进行人工光、温、水控制的如塑料薄膜大棚内进行环草石斛组培苗炼苗，光照强度的要求是使用遮阳网半遮阴；温度控制在14℃－28℃；出瓶苗要求株高2～5cm，叶片4～7，根数3～8；组培苗炼苗基质为底层是约10cm厚的碎石，在碎石上面是腐殖土+锯末+珍珠岩(5：1：1)，最上面是一层5cm厚的新鲜苔藓。

After two-cycle recurrent selections, the starch content raised from 68.15% to 69.27%, and the response selection of starch was 1.12%, and the gain of selection was 1.64%, and each recurrent

说明利用近红外和核磁技术对HS-1群体进行提高淀粉含量的选择是有效的。

Based on the behavior of user in the P2P networks applications,the model has designed many attributes for every peer;some current strategies of peers selection and pieces selection are included in the model;the model has devised the interface for the underlying overlay network topology architecture.

该模型根据现实P2P资源共享系统中用户的行为的基本特点设计了Peer的各种属性，包容了现有常见的P2P资源共享应用中peers选择和pieces选择策略，并为进一步设计P2P底层覆盖网络拓扑结构提供了接口。

Resource Selection Functions have become popular as subjects for studying the extent of ungulate habitat selection, and some models are designed to improve the quality of experiments.

目前，资源选择函数被广泛运用于栖息地喜好程度的分析，并且人们发展了一些量化的模型来改进这一实验方法。

The environmental factors that influenced ungulate habitat selection are various with different seasonal and spatial scales. All methods have their theoretical and practical aspects. Consequences of sympatric ungulates were discussed in this paper.From September 2003 to May 2004, habitat selection by sika deer was studied in Qingliangfeng Natural Reserve, Zhejiang Province, China.

在不同空间尺度上，影响有蹄类栖息地选择的环境因素亦不相同；在不同的季节和生活史阶段，有蹄类对栖息地类型的选择取决于季节性变化的植被因素和有蹄类在不同生活史阶段对栖息地的不同需求。

Typically, when a selection is made, any previous selection is unmade.

通常，当做出一个选择后，以前任何选择都作废了。

In the Options dialog window, under the Selection section, unselect and untick the Show selection ink after snips are captured option, and then press OK button.

在选项对话框窗口中，根据选择部分，取消和untick 显示选择油墨后snips捕捉选项，然后按下OK按钮。

Suggestions about the selection of the objects were put forward:(1) ultimate object:change the present one of "stabilize the valuta hence propel the national economy" to "stabilize the finance, propel the national economy, realize high employment and maintain an international balance of payments";(2) intermediate object selection: attend to not onl...

在中间目标的选择上，不仅要关注货币供应量这一指标，而且也要关注资本市场资产价格的变动。(3)在调控手段的运用上，一是要减少对法定存款准备率手段的依赖；二是要重视运用公开市场业务操作手段，增加公开市场业务操作的频率；三是要实行廉价的货币政策。(4)在我国中央银行宏观调控空间的拓展上，不仅要立足于货币市场，而且要为由货币市场传导向资本市场传导过渡创造条件

When processing the restrained conditions, we convert the restrained conditions into punish function and add it to fitness function which profits from the conventional method. We introduce the support vector machine to the selection operator, which increases the multiplicity of selection and increases the probability of the algorithm getting the overall optimal solution. Also, we use the adaptive probabilities of crossover and mutation in mixed GAs which enhances the efficiency of the algorithm. The result of tests about the system indicates that the improved genetic algorithm has more high convergence speed and better solution quality.

在生成初始种群时，不是简单的随机生成，而是用支持向量机对历史数据进行分类，用较优的一类历史数据作为初始种群；在约束条件的处理上，本文借鉴常规方法中的罚函数法，采用将约束条件作为罚函数包含到适应度评价中去的方法；在选择算子上，本文引入了支持向量机的方法，增加了选择的多样性，增加算法搜索到全局最优解的概率；同时针对交叉概率和变异概率在算法的前后期不同的情况，本文引入了Srinvivas等提出的动态自适应的方法，使得交叉概率和变异概率能够随着算法中个体的质量动态改变，提高算法的效率。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。