查询词典 natural selection

In the meantime, the research of CTR makes clear, athenian Olympic Games is sessional 2004, TV and newspaper are the first selection media of the audience, and Beijing Olympic Games is sessional 2008, the first selection media of Chinese audience is TV and Internet.

同时，CTR的研究表明，2004年雅典奥运会期间，电视和报纸是观众的首选媒体，而2008年北京奥运会期间，中国观众的首选媒体是电视和互联网。

But if music is functional, it may be that sexual selection and social selection have actually given each other a helping hand.

倘若音乐是具有功能性的，那么性别选择和社会选择就有可能是相得益彰的了。

Singletree States made statements: All the details from the manufacturer to start a business in itself is a good school, partner selection is more important than the selection Products Guo Xin character principle: people-oriented, scientific management, quality service, ensure quality.

国欣格言：一切从制造的细节做起、一个好的企业本身就是一座学校、选择合作伙伴比选择产品更重要国欣十六字方针：以人为本、科学管理、优质服务、确保质量。

It shows that external source credibility of word-of-mouth can affect consumer's selection intention, regardless of source in the physical word-of-mouth or in the on-line word-of-mouth.And Internal factors of receiver, there are receiver's expertise, perceived risk, actively sough, has a significant moderating effect on the relationship between external source credibility of word-of-mouth and consumer's selection intention.

研究显示，口碑外在来源可信度，无论在实体口碑来源或网路口碑来源皆会影响消费者选择意愿，而接收者内在因素-「接收者专业程度」、「知觉风险」及「主动搜寻程度」，皆会干扰口碑外在来源可信度对消费者选择意愿的影响。

In this paper, we overviewed the relationship between male gametophytic selection and phenotype of its sporophyte, genetic differentiation and its application in plant genetic improvement, so it would be provided reference information for correlated research of male gametophytic selection.

本文主要概述雄配子体选择与孢子体表型的关系、遗传分化效应及其在植物遗传改良中的应用，以期为雄配子选择相关研究提供参考

The second step is to calculate the frame design. Which includes the frame quality, the flexure style, the crooked intensity. When designing the car body, the first is the structural design of car body. Then is the design and calculate the box column, the selection of the car body, the design of cat ladder, the selection of the car door and the design of the car above floor.

根据弯曲强度，扭转应力的要求，进行了车架的设计计算；在侧围设计中，对立柱进行了研究，根据同行比较选定了侧围板，及爬梯的结构，选择了车门和进行了顶蓬的设计。

The results above showed:(1) The cultivars of large-flowered chrysanthemum are widely distributed in Beijing area with plentiful floral types and floral colors;(2) The cultivars with the rare types and colors are urgent for protection;(3) Most of the quantitative characters obeys to the normal distribution,some important traits agreed with skewed distribution.The probability grading can assist quantitative character in establishing new grading standards;(4) Most of qualitative characters is asymmetrical in cultivars,which might be caused by unbalanced differentiation of characters or linkages coming from emphasis characters selection;(5) The floral characters are relatively stable and have comparably large influence on classification,the characters of stipule also have a certain degree of stability and can act as an reasonable supplement for cultivars classification,but the foliar characters have worse stability and can only be recognized as lower level criterion.(6) The genetic relationship among the Flat-petaled group,the Quilled-petal group and the Spoon-petaled group are closest,which followed by the Filiform-petal group because of long-term selection pressure for the specialization of the petal tip loved by most people.The Anemone-petal group has further genetic relationship with these four groups.(7) ISSR molecular marker detection indicates that the proportion of polymorphic loci of lardge-flowered chrysanthemum is higher,in which the Flat-petaled group has the highest genetic diversity level.

综合以上的研究结果表明：(1)北京地区现有大量大菊品种，且花型与花色较为丰富；(2)珍稀花型、花色品种亟需保护；(3)大部分数量性状是符合正态分布的，少数重点观赏性状迫于选择压力呈现偏态分布，概率分级法能够辅助大菊的数量性状建立新的分级标准；(4)大部分质量性状在品种群内的分布是不均匀的，可能是由菊花性状遗传分化的不均衡性或受到选育重点性状的连锁作用而造成的；(5)大菊花部性状相对稳定，对品种分类影响较大，其托叶部分也具有一定程度的稳定性，可以作为品种分类的合理补充，而叶部性状稳定性较差，在品种分类中应作为更次一级的分类依据；(6)平瓣类、管瓣类和匙瓣类的亲缘关系最近，畸瓣类品种花瓣先端特化受到人们的喜爱，长期的选择压力使其区别于3种基本瓣型，而这四种瓣型与桂瓣类在亲缘关系上较远；(7)ISSR分子标记检测表明：大菊品种多态性位点百分率较高，平瓣类品种的遗传分化最为丰富。

The system schemes are selected in descending probability order. The stopping rule for the state selection is the index accuracy. The relationship between scheme selection accuracy and the forecasting time is also studied. The results show that only a small number of system schemes are required to achieve the high accuracy of the short-term reliability index. Hence, evaluation can be performed in the online environment. The proposed algorithm is applied to the IEEE-RTS.

按照概率大小进行系统状态选择，按照指标精度进行状态截止，并研究了状态截止精度随预测时间的变化关系，表明短期评估只需选择少量系统状态就能满足较高的评估精度，具备在线应用的前景，通过算例IEEE-RTS进行了验证。

In order to deduce the transmitter complexity and the impact caused by non-linearity, we introduce antenna selection into the subchannel allocation algorithm and propose a joint adaptive subchannel allocation and antenna selection algorithm.

为了降低发送端的硬件复杂度以及非线性因素的影响，将自适应信道分配和发送天线选择相结合，提出联合自适应子信道分配和天线选择算法。

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。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。