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- negative selection operator 否定选择算子
- Because thymic dendritic cells are the potent antigen presenting cells in the thymus, they must play an important role in thymic negative selection. 胸腺树突状细胞作为胸腺内功能强大的抗原呈递细胞,在阴性选择中必定发挥着不可忽视的作用。
- During breeding for vertical resistance, horizontal resistance tends to decline because of negative selection pressure. 当培育垂直抗性时，由于负的选择压力，水平抗性趋于下降。
- In order to increase the diversity of population, MFCMGA uses idiotypic immune network theory to improve the selection operator of SGA. 该算法利用免疫系统独特性网络学说，改进标准遗传算法选择运算子，提高了种群多样性；
- The process of thymic negative selection is the process of the central immunologic tolerance, namely the process of autoreac-tive thymic cells being deleted or becoming allergy. 胸腺内阴性选择的发生过程也就是中枢免疫耐受的形成过程,即自身反应性胸腺细胞被克隆清除或处于免疫无能状态的过程。
- The original selection operator and crossover operator were respectively reconstructed to dynamic selection operator and gene transfer operator. 原始的选择算子和交叉算子分别被改造为动态选择算子和基因传递算子；
- The symbol encoding style what was needed for the optimization apportion model was solved, and selection operator, cross operator and mutation operator were designed concretely. 解决了优化分配模型所需的符号编码方式，并给出了相关的选择、交叉、变异等遗传算子的具体设计。
- This paper presents a method that improves the simple genetic algorithms (SGA) with bipolar compressed functional fitness scaling and selection operator based on crowding model. 运用双极性压缩函数适应度定标和基于排挤方法的选择算子改进标准遗传算法（SGA），使其成为简单通用、快速收敛的并行全局搜索算法。
- Through positive and negative selection, the thymocytes with high avidity for self peptide-MHC complex were eliminated, but retained low but significant reactivity for self-peptides. 近年有关外周T细胞群体存活与稳态的深入研究发现:抗原活化前T细胞的存活需要自身肽MHC复合物的作用以提供适度的存活信号;
- The selected operation should be retried. 应该重试您所选择的操作。
- In addition, a new idea ,similar to the pheromone in Ant Colony System, was i ntroduced to the selection operator, which is helpful to applying Genetic Algori thm to other problem. 提出运用遗传算法实现生产调度的优化求解，并在选择算子中引进蚂蚁算法的信息素思想，对问题求解具有普遍的指导意义。
- According to the experimental results with 11 benchmark functions，it is proved that with the new selection operator，GA will maintain the diversity and get higher accuracy than SGA does. 通过对11个函数（单峰和多峰）的仿真实验，证明了采用新的选择算子后，GA在求解问题的精确度上有了很大地改善。
- Dendritic cell and thymic negative selection 树突状细胞和胸腺阴性选择
- Cannot choose this operator, since the selected operator is a parent of the current operator. 不能选择操作,选定的操作是当前操作的母轨。
- In this paper, negative selection algorithm for artificial immune system (AIS) is improved by adopting genetic algorithm, in which Euclidean distance is selected as fitness function, to generate detectors (antibodies). 摘要将人工免疫系统的反面选择算法作了改进，在产生检测器时，利用了遗传算法，并将欧几里德距离作为遗传算法中的适应函数。
- The DCs in the thymus have )been subdivided into two populations, lymphoid DCs and myeloid DCs.They can induce negative selection of effective T cells and positive selective of regulatory T cells. 胸腺中树突状细胞分为淋巴源性和髓源性,参与效应性T细胞的阴性选择和调节性T细胞的阳性选择过程。
- multi - level negative selection 多级否定选择
- negative selection in cell culture 增减细胞负选择法
- It is, rather, a long-term process characterized mainly by mutation, competition and natural selection operating within the population of cells. ，相反，一个长期的过程以在细胞的人口内经营的变化，竞争和自然选择主要描述。
- Abstract: To improve the efficiency of targeted gene replacement (TGR), a dual screen (DS) system with gusA gene as negative selective marker (GUS-DS) was developed in Magnaporthe oryzae. 摘 要: 目标基因替换是基因功能研究的重要方法, 在生物工程领域广泛应用。
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