并对相位突变和频率突变的情况进行了仿真研究，说明在相位和频率发生变动时三相锁相环仍能有效地锁定相位，能够满足系统变频的要求。
The simulation results prove that the three-phase phase-locked loop can work well in disturbance situation and variable frequency system when the frequency of the inputs is variable.
随着新等位基因在每个群体中独立突变产生，它们在许多遗传位点上的等位基因频率逐渐变得越来越不同。
Their allele frequencies at numerous genetic loci gradually become more and more different as new alleles independently arise by mutation in each population.
这些突变的发生频率之高令人惊讶，但真正的问题在于，即使在发生这些情况之后，常规的预测方法也意识不到。
These breaks happen with alarming frequency, but the real problem is that conventional forecasting approaches do not recognise them even after they have happened.
目的：研究rp1基因在中国RP患者中的突变频率、特征及其在RP发病机制中所起的作用。
OBJECTIVE: To investigate the mutation frequency, characteristics of RP1 gene in Chinese RP patients and its role in RP pathogenesis.
HPRT基因突变频率与染色体畸变、微核具有良好的相关性。
The HPRT gene mutation frequencies had better linear relations with chromosome aberrations and micronuclei.
个体的辐射敏感性较高者，GPA基因突变频率较高；
The stronger the individual radiation sensitivity, the higher the GPA gene mutation frequency.
而其他两试验组与对照组间突变频率在3%左右。
The frequency of mutation is about 3% between other testing group and comparison of group.
应用这项技术，可大大提高M 2代突变频率和选择效率。
Mutation frequency and selective efficiency in M2 were obviously increased by application of the technique.
目的探讨个体辐射敏感性对GPA基因突变频率的影响及其校正方法。
Objective To study the influence of individual radiation sensitivity on GPA gene mutation frequency and the way to adjust it.
结论：IFABP基因54位点突变频率分布与种族无关，而可能与年龄、高脂饮食习惯相关。
CONCLUSION: Distribution of frequency of mutation at 54 Thr of IFABP gene is not associated with race, but possible associated with age and high-fat eating habit.
方法采用多核细胞法研究肿瘤患者外周血淋巴细胞HPRT基因位点的突变频率，并与正常人群进行对比。
Methods A simple, rapid and sensitive poly-nuclear cell assay was used to investigate the frequency of HPRT locus mutation.
的变化，频率的基因突变和无限期形态特征也登记。
The changes in the frequency of genetically indefinite mutations and morphological traits were also registered.
结论CYP2A6突变基因在肺癌组及对照组中的频率分布没有差异。
Conclusion There is no difference in frequency of CYP2A6 gene deletion between lung cancer cases and controls.
统计结果表明，形态性状的突变频率为5.1%。
The statistic analysis indicated that the mutation frequency of morphological character was 5.1%.
目的：研究内蒙古地区经典型苯丙酮尿症（PKU）苯丙氨酸羟化酶（PAH）基因突变的特点和频率，以提高该地区PKU的基因诊断率。
Objective:To study the mutations of the phenylalanine hydroxylase(PAH)gene and enhance the gene diagnosis of classical phenylketonuria(PKU) in Inner Mongolia.
他们指明了比基因单独突变，显著增高或降低的突变频率。
They identified the frequencies of mutations that were significantly higher or lower than if the genes had mutated independently.
研究人员称这种突变的基因可以在印度，巴基斯坦，斯里兰卡找到极其相似的频率。
The researchers say this nitrated gene has been found roughly similar frequencies in India, Pakistan and Sri Lanka.
在一定剂量范围内，人外周血淋巴细胞克隆效率与照射剂量呈负相关，HPRT基因突变频率与照射剂量呈正相关。
In the radiation dose range used, the colony efficiency of the lymphocytes was negatively correlated to the radiation dose, while the HPRT mutation frequency is positively correlated.
结论：我们证实了原先发现的结论，即不同组织病理学亚型之间突变频率存在显著的差异。
CONCLUSIONS: we confirmed previous findings of pronounced differences in mutation frequency between different histopathological subtypes.
获得微震异常信号的突变时刻及突变时刻所对应的频率成分，是微震监测中亟待解决的关键问题。
To obtain the sudden change time of the unusual microseismic signal and the corresponding frequency composition is a key problem demanding to be solved promptly in microseismic monitoring.
与常规育种相比，航天诱变育种具有诱变频率高、变异幅度大、育种周期短、有利突变体多等特点。
As compared with the conversational breeding, spaceflight mutation breeding is of high mutagenesis frequency, wide variation extent, short breeding period and more elite mutants, etc.
结论中国哈萨克族TPMT活性呈正态分布，总TPMT基因突变频率同汉族相比差异无显著性。
Conclusion There were no statistically significant differences in Chinese Kazakstan and Chinese Han in distribution of TPMT activity and genotype frequence of TPMT.
血型糖蛋白A（GPA）基因突变频率在作为生物剂量计及癌的风险预测方面最大的缺陷在于个体差异大。
The prominent disadvantage of using GPA mutation frequency as biodosimeter and cancer risk predictor is the significant individual differences.
熟知brca1和BRCA2基因突变可引起乳癌和卵巢癌，不过在普通人群中突变的频率还没有很好地描述。
Mutations in the BRCA1 and BRCA2 genes are known to lead to breast and ovarian cancer. However, the frequency of these mutations in the general population has not been well-characterized.
慢照射辐射损伤小，突变频率高，有益突变多。
The chronic irradiation was minor in injury and higher in frequencies of beneficial variation.
目的了解错配修复基因MSH6在不同形式大肠癌人群中的种系突变频率及特征，提供真正的突变热点。
Objective To explore germline mutation frequencies and features of mismatch repaired gene MSH6 in persons with different kinds of colorectal cancer.
结果：对照组和苯酮尿症组该突变位点的基因频率分别为70.2％和79.5％，经统计学检验无显著性差异。
Results: the mutation frequency of V245V in the control group and PKU group was 70.2 % and 79.5 % respectively. There was no significant difference between the two groups.
巨大胚和甜胚乳两突变体基因突变频率分别为0.0227和0.0070。
The mutation frequencies in ge and su mutant were 0.0227 and 0.0070 respectively.
研究结果首次证实了百脉根通过航天诱变处理可以得到多种类型的突变体，并且变异频率高、突变可稳定遗传。
The results approved for the first time that we can obtained various Lotus Japonicus mutants through space flight mutation, and mutant frequency was higher, most of the mutations could stable inherit.
研究结果首次证实了百脉根通过航天诱变处理可以得到多种类型的突变体，并且变异频率高、突变可稳定遗传。
The results approved for the first time that we can obtained various Lotus Japonicus mutants through space flight mutation, and mutant frequency was higher, most of the mutations could stable inherit.
应用推荐