频率

Results show that for KEMAR mannequin,pinnae destroy the front-back symmetry of HRTF above 5～6 kHz,while for human subjects it reduces to 2.5 kHz because of the locations of ears.

结果表明，在5 kHz至6 kHz以上的频率，耳廓破坏了头相关传输函数的前后对称性；而受耳道入口位置的影响，真人受试者的头相关传输函数在2.5 kHz以上的频率就开始出现前后不对称。

It was found that the incidence of As and Wd in the group of juvenile poliosis and the correspondence rate of A/A and L/W were obviously lower than those of the normal contrast group,while a-b TRC value in the female patients with juvenile poliosis and the incidence of abnormal palmprint in the male, the frequency of all loop whorl,and palm patterns in the I2 area of the right hand and in the Hyarea of the left hand were evidently higher than the corresponding incidences of the normal contrast group.

发现青少年白发组的As和Wd出现率以及A/A和L/W的对应频率均显著低于正常对照组；青少年白发组女性的a-bTRC值、男性变异型掌褶纹的出现率、10指同斗频率、右手Ⅰ2区及左手Hy区的花纹出现率均显著高于正常对照组的相应出现率。

The highest transformation frequency 11.21% was achieved on the optimization facts, which were medium YEB with pH5.6, bacterial concentration OD 600=0.4, precultivation for one day, cocultivation for four days, the coculaivation media supplemented with GA3 0.5 mg/L and leaf explanst growed for 45 days.

研究了影响转化频率的主要因素，得出在使用pH5.6的YEB培养基，菌液浓度OD600＝0.4，45日苗龄中部叶片预培养1 d，共培养4 d，共培养的培养基中加入0.5 mg/L GA3的条件下可使转化频率提高到11.21%。

The most important predictors of HPV DNA positivity were younger age at first sexual intercourse (OR=1.2, 95%CI 1.1-1.3, P.05)and a history of condyloma acuminatum (OR=3.3, 95%CI 1.2-9.3, P.05) or other STDs in the past two years(OR=3.8, 95%CI 1.4-10.2, P.05), while other factors including age , preputial status, number of sex partners, the average frequency of sexual intercourse , condom using and sex partners' history of genital warts in the past two years had no significant relation with latent HPV infection.

年龄、包皮状况、近2年内性伴数、平均性生活频率、安全套的使用频率以及性伴尖锐湿疣病史与HPV DNA阳性无明显关联。

This paper reports the restriction allele frequencies, polymorphism information contents and heterozygote frequencies of the restriction sites of D4S10 locus, pK082/Hind Ⅲ(2),pK083/EcoRI(1) and pK081/EcoRI(2), detected by three sub-clones of the G8 probe and tries to do presymptomatic diagnosis of Huntington 's disease for phenotypically normal family members in two HD families.

报道53例样本D4S10基因座由G8探针3个亚探针检出的限制酶切位点pK082／HindⅢ（2）、pK083／EcoRⅠ（1）和pK081／EcoRⅠ（2）的等位片段频率、多态性信息含量和杂合子频率，并试对2个Huntington舞蹈病家系成员作症状前诊断。

First, calculating the pressure pulsation in the condition of different velocity and pulsant frequency through using CFD software, then calculate the ahead natural frequency and length of resonance, which offer a reference to the select of pipe length in Hot Blast Stove.

利用通用CFD软件计算不同速度、脉动频率下压力不均匀度沿管道的分布情况，同时计算出管内气柱的前几阶固有频率及共振管长，该方法为热风炉管道系统选取合适的长度提供了参考。

At constant viscosity, by increasing the liquid flow rate, the liquid film's velocity is increased; at the same experiment condition, the frequency of the liquid film is same at the same radial direction; the air current has minimum effect on liquid film bottom flow velocity, while it has an obvious effect on liquid film surface flow velocity. The longer the distance between liquid film and the inlet, the lower the pulsatory frequency and longer the wavelength.

在粘度基本不变的情况下，随着液体质量流率的增加，液膜流动速度随之增加；在同一个实验条件下，沿圆管径向各质点的频率基本保持不变；气流场速度对液膜底层流动速度影响很小，对于液膜表面流动速度有着较大的影响；沿液膜流动方向，液膜的脉动速度逐渐增加，脉动频率降低，脉动波长变长，与报道的通过快速摄像得到的液膜发展趋势一致，证实用PDA研究液膜流动是可行的。

Result proves that ultrasound frequency is higher in the same time, lethality rate increases with the increase of radialization time on the same frequency, at the same time, its physiological character changes.

试验结果表明，在相同的时间内，超声波频率越高对试验菌株的致死率越高；同一频率，超声波辐射时间增加也可使试验菌株的致死率增高，同时经过诱变处理后的菌株其生理生化特性也有变化

There was no residue or few from asphaltene reprecipitation after acidolysis asphaltene, and using fatty acids were extracted by hexane.

结果表明，相同阳离子的不同羧酸盐活化能和频率因子分布特征相似，拥有相同的均值，不同之处在于短链的比长链的羧酸盐振荡幅度宽；不同阳离子的同种羧酸盐，活化能和频率因子分布却相差很大。

The principle here is to resistively load down the OUTPUT of the AMPLIFIER for frequencies in the vicinity at which peaking occurs—thus snubbing down the AMPLIFIER 's gain, then use series capacitance to decrease the loading at lower frequencies.

从频率上看已经超出负载电容的影响范围了，而且，在这个频率下CL的阻抗可能已经大大改变了。

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