查询词典 natural selection

With proper atomic coherence, the performance has the following advantages compared with that of the velocity selection of the ultracold two-level atoms by the micromaser: high resonant transmitted efficiency, low unresonant transmitted efficiency, and large velocity selection scale. The second part includes the fifth chapter.

原子透射几率只受到一种量子干涉效应的影响，其来源为V型的两个跃迁通道，因此Micromaser对入射超冷V型三能级原子束速度的选择性能深深地受到原子相干性的影响，我们发现选取适当的原子相干参数以及其它参数，速度选择性能可以达到很理想的状态：共振原子透射效率高、透射原子束的速度纯度好、速度选择范围大。

A greedy feature selection algorithm has been employed, and a wieldy sample selection algorithm basing on the frequency histogram re-sampling has been proposed, which reduces the influence of redundant features and samples, and consequently improved the robustness of the resulting*recognition system.

从模式识别本身对训练样本集的要求出发，给出了基于频度统计函数重抽样的样本选择方法，一定程度上消除了冗余样本和奇异样本给分类器的学习、训练和分类识别带来的不良影响。

Under the auspices of MOP and MOA in the last ten years, an integrated technical study on forage species selection, variety combination, seed treatment, land surface treatment, proper seeding time, airplane type selection, maintenance after seeding and reasonable utilization was conducted in the county, focused on aviating seeding and protection and utilization.

飞播种草是沙化、退化草地治理的重要技术措施之一，近10年在财政部、农业部的大力支持下，全国开展了以&飞播种草＋保护利用&为核心，对牧草筛选、草种组合、种子处理、地面处理、适时播种、机型选择、播后管护、合理利用8项关键技术进行组装和研究，集成应用在北方沙化退化草地区等6个不同生态区域中。

The efficiency of molecular marker-assisted selection was investigated using two populations from pedigree selection and modified backcrossing pyramiding developed for the breeding purpose.

利用长江流域推广品种泗棉3号和优异纤维种质系7235为育种亲本，配置了系统育种和修饰回交聚合育种两套群体。

Collating is very important in data processing and it takes much time in batched data processing.The paper introduces an improved selection collating algorithm,which extremely reduces number of comparision times comparing with the usual selection collating algorithm and saves more than 40% of CPU time.

排序在数据处理中起着极其重要的作用，而排序在成批数据处理中占了相当的计算机时间，介绍的一种改进的选择排序算法，与通常的简单选择排序算法相比，大大地减少了比较次数，平均节省了40％的CPU时间。

Starting from the characteristics and the essential properties of flower bonier, the aspects of flower bonier such as the location selection, plane and elevation, the background design, plant material selection, color design and the applications of flower border were discussed in order to provide reference for the urban greening.

分析了目前国内花境设计研究与城市绿化应用的现状及存在问题，从花境的特点与本质属性出发，就花境的位置选择、平立面、背景设计、植物材料选择、色彩设计、花境应用等方面进行了探讨，以期为城市绿化提供参考。

The development trend of the selection method is better taking the multiple-attributive decision method and fuzzing mathematics 'theory into the selection of the equipment type.

论文系统地阐述了设备选型所遵循的原则和设备选型过程中的影响因素，如设备的成本、利用率、安全性能等。

The innovative traits of this research lies in which it hackled the theory of the recruitment and selection of the medium professional manager, and established the system of the recruitment and selection of the medium professional manager on the basis of empirical analysis on the competency mode of the medium professional manager.

第8章：我国中级职业经理人的选聘机制分析。在归纳总结了第4、5、6、7章的基础上，系统的提出了我国中级职业经理人选聘机制，并对此选聘机制进行阐释。本文主要在以下几个方面有所发展和创新：1。系统梳理了中级职业经理人选聘的相关理论。2。

There is new option called 'Enable Localizes Clusters' , which when selected can carry out more advanced calculations when you add and subtract using the selection eyedropper tools to refine a Color Range Selection.

有新的选择所谓的'启用查找集群，这时候选择可以开展更先进的计算时，加减使用选择滴管工具，以完善彩色范围选择。

Based on this mechanism, a clonal selection algorithm for multi-modal function optimization has been proposed by formulating suitable clonal selection operators and introducing a new niching technology in this paper.

多目标优化问题的解不是唯一的，而是一个最优解集合。这类问题大多有较高维的搜索空间，传统的优化方法会导致很高的时间复杂性。

I was up all night because I was in pain, she said.

我整夜，因为我在疼痛，她说。

A crow caws /craoks.

乌鸦叫。 51-论文网