查询词典 mutation

The results were as follows: The mutation rate could be increased effectively by the three treatments; the cooperation effect was better when TMV was treated by nitrous acid and heating.

采用高温、亚硝酸及两者的复合处理对烟草花叶病毒强毒株进行诱变，均可有效提高突变频率，而且复合处理还有较好的协同效应。

The variation information is harvested from public mutation and polymorphism databases, such as dbSNP (http:∥www. ncbi. nlm. nih. gov/SNP), HGVbase http:∥hgvbase.

变异信息主要从公共的突变和多态数据库中获取，比如OMIM(http：∥www.ncbi.nlm.nih.gov／omim)、dbSNP(http：∥www.ncbi.nlm.nih.gov／SNP)和HGVbase(http：∥hgvbase.cgr.ki.se)，多态数据均归于不同的基因位点。

It has opened a new way for the diagnosis and therapy of tumours, and also estab- lished the foundation for the carcinogenic mechanism research. In order to study the altered molecular events during laryngeal car- cinogenesis and elucidat the role of oncogenes in laryngeal carci- noma, we examined the Ha-ras and c-myc gene mutation and amplification by the polymerase chain reaction and molecu- lar hybridization technigues respectivly.

癌基因的研究是当前肿瘤领域内的重大课题，正在基础理论和临床医学中进行广泛和深入的研究，癌基因的发现为肿瘤的诊断和治疗开辟了新的途径，同时也为人类开始从分子水平来回答细胞癌变的本质问题，最终认识癌变机制奠定了理论基础。

In this implementation, the evolutionary algorithm is hybridized with the simulated annealing algorithm and the hill climbing heuristic. The main aspects are as follows. The Metropolis criterion of the simulated annealing algorithm is introduced to select the offspring in order to make the algorithm more effective to escape the local optimum. In terms of the hill climbing heuristic, the local normal perturbing mutation operator based probability selecting is developed to enhance the local searching of the algorithm.

其主要工作是将进化算法与模拟退火算法及爬山方法相组合，引入模拟退火算法中Metropolis接受准则选择子代，提高算法跳出局部最优解的能力：借鉴爬山方法思想，构造了基于概率选择的局部正态摄动变异算子，以强化进化算法局部细搜索能力；同时进化算法以多种群方式实现，在降低计算时间的同时提高算法收敛到全局最优解的概率。

Quantum NOT gate is used to realize quantum mutation to avoid premature convergence.

引言 量子计算是信息科学和量子力学相结合的新兴交叉学科。

Another concept is to prevent drug resistance and optimal management of strategy was nucleoside resistance mutation.

而另一种观念认为最佳的办法是阻止核苷类似物耐药的发生。

It introduced research actual state of genetic algorithms, enumerated the calculation result of global optimized crossover and mutation, gave the mostly program of binary system character string coding and using numerical model and the practical data checked out the effectiveness of mixed inversion algorithm.

文中介绍了遗传算法的研究现状，例举了全局寻优交叉和变异的计算结果，给出了二进制字符串编码的主要程序段，用数值模型与实际资料验正了混合反演算法的有效性。

Because women with a BRCA1 mutation carry a high lifetime risk for breast cancer, many enter menopause prematurely because of prophylactic surgical oophorectomy at a young age.

因为有BRCA1基因突变的女性，罹患乳癌的风险较高，且许多女性因为在年轻的时候接受预防性卵巢切除术而提早停经。

It is estimated that 68% of women in the United States and 54% of women in Canada who have a positive genetic test result for a BRCA1 or BRCA2 mutation undergo oophorectomy, so the potential association between hormone therapy and breast cancer is of particular interest to them.

据估计，BRCA1或是BRCA2基因突变的女性，美国有68%，加拿大有54%都会接受预防性卵巢切除术，因此荷尔蒙治疗与乳癌之间潜在的关联特别受到注意。

Because this problem was studied together for group members, this text has expounded the part about fitness function and mutation operator that I finished.

由于此问题为小组成员共同研究，本文重点论述了本人完成的关于适应度函数和变异操作的部分。

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。