查询词典 selection

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。

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。

Do not gum up the work by telling mother what we are going to do .

别告诉母亲我们要干的事，那会把事情搞糟的。

In recent years, application of the partial prestressed concrete beam s is developed.

近年来，随着部分预应力砼梁应用的推广，发现我国规范所采用的名义拉应力法的计算结果不稳定。