查询词典 mutation

In reality, the symmetry is always broken because of the subsistent mutation, insertion and deletion in DNA sequence.

在实际中，往往由于存在碱基的突变，插入和缺失，从而导致了这种对称性的破缺。

On the aspect of urban spatial distribution DM: Adopting the conception model of combination of location and attribute, the author brings spatial coordinates, spatial relationship and attribute character into the unitive model of spatial computation, studies city's land suitableness evaluation and the method of spatial clustering in division of urban function districts and brings forward the arithmetic of classification layer. Aiming at land spatial optimization allocation, the author puts forward SGA. In this arithmetic selection, crossover and mutation operator are progressed on the space.

在城市空间分布数据挖掘方面：采用空间—属性一体化概念模型，把空间坐标、空间关系和属性特征纳入到统一的空间计算模型，分别对城市土地适宜性评价和城市功能区划分中的空间聚类方法进行了研究，并提出了一种分类图层的平滑算法；针对城市土地的空间优化配置，提出了一种空间遗传算法，该算法中的选择、交叉、变异算子都是在空间上进行的；对多要素离散空间场之间的相关性测度，定义了一种基于信息熵的规范的相关指数，并给出了计算方法。

The Pc DHPS gene of the sulfanilamide treatment group and positive control group were not found Ala55/Ser57 mutation by PCR-RFLP technique.

结论(1)地塞米松磷酸钠皮下注射法是一种建立SD大鼠肺孢子虫肺炎动物模型的良好方法。

At the same time, intact shuttle-plasmid pZ189 was also introduced into the host cell which was used for detection of nontargeted mutation frequency. After replicating in cells, progeny plasmid DNA was isolated and transformed into E coli. MBM7070.In the presence of ampicillin, X-gal and IPTG, pZ189-transformed E. Coli MBM7070 forms blue colony if the plasmid contains an active SupF suppresser tRNA gene, and white or light blue colony if the SupF tRNA gene is inactive.

但是由于检测非定标性突变需同时引入穿梭质粒pZ189在细胞中复制，并回收质粒DNA，通过转化宿主菌E.coliMBM7070，在含x-gal和IPTG的氨苄指示板上培养，如果用于检测突变的靶基因SupF tRNA基因发生突变，则菌落色泽为白色或淡蓝色，而正常者为兰色。

It is called Quantum-behaved Particle Swarm Optimization algorithm with mutation operator.

该算法称为带变异算子的量子粒子群优化算法。

A novel neural network algorithm based on hybrid particle swarm optimization with adaptive mutation is presented.

在相空间重构和神经网络的基础上，提出了一种基于自适应变异混合粒子群的神经网络算法。

A new Particle Swarm Optimization algorithm PSO with velocity mutation operator, was presented.

提出了一种新型的PSO算法———含速度变异算子的粒子群算法。

Especially the hybrid particle swarm optimization algorithm with across strategy and mutation strategy is simple and effective.

与模拟退火算法、标准遗传算法进行比较，24种混合粒子群算法的效果都比较好，其中交叉策略D和变异策略F的混合粒子群算法的效果最好，而且简单有效。

In the previous study,we identified a novel point mutation of HOXD13 in a Chinese family with syndactyly typeⅤ.

前期工作中，本课题组在一个中国汉族V型并指家系中首次鉴定出HOXD13 p.Q317R点突变，主要畸形为第4、5掌骨融合。

The typical clinical manifestations of SPD are soft tissue syndactyly between the third and fourth fingers,and between the fourth and fifth toes,with a supernumerary digit in the syndactylous web.p.Q317R point mutation located in the homeodomain of HOXD13 can result in typeⅤsyndactyly(MIM 186300),which is characterized by fusion of the fourth and fifth metacarpal.

本研究对HOXD13同源盒p.Q317R点突变和多聚丙氨酸延展突变进行功能研究，探索这两种突变导致不同并指畸形的分子机制。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。