频率

The frequency of cells with univalent at MI and with lagging chromosomes and chromosomal bridge at A I in PMC of F1 hybrids of 4 alloplasmic 1BL:/1RS and non-1BL/1RS wheat male sterile lines with Aegilops kotschyi,Ae. variabilis,Ae.ventricosa and Ae.bicornis cytoplasms were systematically investigated,and the relationship between FCU at M I,FCLB at A I and F1 selfed seed set was analyzed.

系统调查了4类异质(粘果、易变、偏凸、二角山羊草细胞质)1BL/lRS、非1BL/1RS小麦雄性不育系与其恢复系杂种F减数分裂中期Ⅰ出现单价体细胞频率，以及后期Ⅰ出现落后染色体和染色体桥细胞频率，并对中、后期染色体变异率与杂种F自交结实率进行了相关分析。

Results The highest drug use frequency was biguanide. There was 50.9% in the oral antidiabetic drug combination. Leading the first 3 places on the list of drug combination were sulfonylureas in combination with biguanide, sulfonylureas in combination with α-Glycosidace inhibitor, biguanide in combination with α-Glycosidace inhibitor, while there was 16.1% in 3 kinds combination. When oral antidiabetic drugs were combined with other drugs, combination with antihypertensives drugs led the fist, while with antihypertensives drugs led the second.

结果 二甲双胍使用频率最高，口服降糖药联合用药的比例高达50.9%，居前3位的依次是磺脲类＋双胍类、磺脲类＋α-葡萄糖苷酶抑制剂和双胍类＋α-葡萄糖苷酶抑制剂，而3种以上口服降糖药联合用药的比例也达16.1%；口服降糖药与其他药物联合使用情况看，配合使用抗高血压药的频率最高，其次是降脂药。

The strong FSGS and large genetic patches may induced high level of biparental inbreeding, which reduced effective outcrossing rate.

综合野生大豆遗传多样性水平、遗传结构与交配系统的研究进行分析，在制定野生大豆保护策略特别是原位保护策略时，保持种群生境一定程度的自然扰动可以打破种群内空间遗传结构或是减弱空间遗传结构，这将提高有效异交的频率，增加种群内杂合子的频率，从而维持种群内较高的遗传多样性水平，保持野生大豆的进化潜力。

We found that the SCE frequency of somatic cells in Bufo bufo gargarizans was 7.83±0.49,which was higher than that of mammals in general.

此外，我们还测定了中华大蟾蜍淋巴细胞的SCE频率，发现其SCE频率比哺乳动物高，为7.83±0.49。

Frequency distribution of 7 phenotypic characteristics in Castanea mollissima primarily displayed a normal distribution.

板栗7个性状频率分布基本符合正态分布，但偏度和削度各自不同，众数的位置及所在组的频率也存在一定差异。

The statistic shows the occurrence of cataphora is relatively few. Thus we briefly study the formal markers in discourse.

语料频率统计显示，预指在汉语中的出现频率相当低，本章简要讨论了&这&与&那&类在篇章中的用法。

This paper gets the following conclusions through analysis: I The differences of anaphoric and cataphoric reference in English and Chinese are: The use frequency of pronouns in English is much higher than in Chinese; Zero anaphor is a unique coreference form in Chinese text; Cataphoric reference occurs less frequently than anaphoric reference, therefore it is always explained as exceptional cases with communicative motivition or means to strengthen stylistic effect.

在英语语篇中的使用频率远高于在汉语中的使用；汉语所特有的英语中缺乏的指同形式——零照应为汉语语篇中的一大显著特征；反指在文章中的出现频率远远低于前指，因而反指被解释为含有交际动机的例外现象，或为加强文体效果而存在的手段，这一点是英汉文章中反指的共同现象，而汉语区别英语之处在于汉语中大量出现的零反指现象，这一现象可以用来解释英语为形合语言而汉语为意合语言。

In order to correct spectrum with the single frequency(multi-frequency at a distance ),this paper presents the Energy Centrobaric Correction Method,which develops the Three-point Convolution Correction Method to be a general method which can correct frequency ,amplitude and phase.

提出了对单频率成分进行频谱校正的能量重心校正法，使三点卷积幅值校正方法发展成为一种能校正频率、幅值和相位的通用方法。

Due to existing signal processing technology's shortage such aslow measurement, narrow measurement range precision and other poor performance, we introduced a high-precise signal processing technology:firstly,to get power spectrum with Hanning windowed Welch modified periodogram, search its peak value frequency;secondly, to apply zooming analysis via Goertzel algorithm;at last,to get a highly precise doppler frequency with energy centrobaric rectifying algorithm.

针对存在的缺点，本文提出了一种应用于激光多普勒测速的高精度信号处理技术，即首先利用加Hanning窗的Welch修正周期图算法得到信号功率谱，搜索其谱峰值频率，接着利用Goertzel频谱细化算法对搜索的谱峰进行细化分析，再引入能量重心频谱校正算法对细化后的谱峰进行校正分析，从而将离散频谱分析算法、频谱细化算法和频谱校正算法三者有机结合起来，充分发挥各自的优点：通过加Hanning窗的Welch修正周期图算法快速得到功率谱及峰值频率，通过Goertzel算法获得分析频带的高分辨率频谱，然后通过能量重心校正算法对细化后的频谱进行高精度校正，这样不仅保证了算法的高效性，而且大大提高了分析的精度。

The purpose of the work is to investigate the frequencies and polymorphisms of HIV-1 resistant CCR5delta32,CCR2b-64I,SDF1-3′A alleles in Chinese Dai and Chingpaw populations.Whole blood samples from 101 Dai subjects and 113 Chingpaw were collected randomly and their genomic DNA were extracted with QIAgen Blood Kits.Allelic frequencies were identified by PCR-RFLP analysis.Allelic polymorphisms in Dai population or Chingpaw population and both sexes in the samples were analyzed by χ2 test.

为了调查HIV-1感染相关的等位基因CCR5△32、CCR2b-64I、SDF1-3′A在我国云南省德宏州傣族景颇族人群中的频率和多态性分布，此课题以101例傣族和113例景颇族人群为研究对象，应用PCR、PCR-RFLP(聚合酶链反应-限制性片段长度多态性)分析方法进行检测，计算突变基因频率；并对其群体分布、性别分布进行统计学分析。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐