查询词典 frequency

In this paper,the different frequency ultrasonic and sweep frequency ultrasonic is used to degum ramie,which shows that the effect of sweep frequency ultrasonic is perfect.

文章通过采用不同频率的超声波和扫频式超声波对苎麻脱胶的对比试验，说明了扫频式超声波对苎麻脱胶的优势，并通过分析苎麻原麻的结构和超声波脱胶特性对扫频式超声波这一优势加以解释。

Except that LIF can get high precision for the laser frequency stabilization, it can make laser frequency detune from one atomic resonance frequency easy and exact.

激光感生荧光稳频技术除有很高的稳频精度以外，还可以获得相对于原子共振频率的一定失谐量。

Except that LIF can get high precision for the laser frequency stabilization, it can makelaser frequency detune from one atomic resonance frequency easy and exact.

激光感生荧光稳频技术除有很高的稳频精度以外，还可以获得相对于原子共振频率的一定失谐量。

The fre-quency equations are derived according to stress match, consid-ering gear as a thin bar and adopting exponential horn. Then the influences of vibration of transformer which consists of horn and gear are explored, which come from the length of horn and the machining frequency. It has been discovered that the reso-nance frequency of the horn is the detune one of transformer and the resonance frequency is not same as one of horn, which provide theoretical rules for transformer design.

鉴于此，根据应力耦合，将齿轮作为圆盘，采用指数型变幅杆，推导频率方程，对变幅杆的设计长度和变幅器振动频率进行数值分析，发现变幅杆的共振频率恰好是变幅器的失谐频率，变幅器的共振频率与变幅杆的固有频率也不相同，这能够为超声珩齿变幅器的设计提供理论依据。

The results showed that virulence frequency of V4a、V4b、V13、V20、V21、VXBD、V2+6、V4+8、V2+Mli、V4b+Mli、V5+6、V1+2+9 were 3.6%~29.7%, Pm4a, Pm4b, Pm13, Pm20, Pm21, PmXBD, Pm2+6, Pm4+8, Pm2+Mli, Pm4b+Mli, Pm5+6, Pm1+2+9 were effective resistant genes to Erysiphe graminis f. sp. tritici and may be applicated as resistant parents; Virulence frequency of V1、V2、V3a、V3d、V3f、V6、V17、V19、V2+Ta were 38.6%~79.4%, The validity of Pm1、Pm2、Pm3a、Pm3d、Pm3f、Pm6、Pm17、Pm19、Pm2+Ta had decreased; Virulence frequency of V3b、V3c、V3e、V5、V7、V8 were 92.5%~98.7%, Pm3b、Pm3c、Pm3e、Pm5、Pm7、Pm8 had no applicable value in breeding if they were utilized as the only resistant sources.

结果表明，毒性基因V4 a、V4 b、V13、V20、V21、VXBD、V2+6、V4+8、V2+Mli、V4 b+Mli、V5+6、V1+2+9的出现频率为3.6%29.7%，其对应抗性基因Pm4 a、Pm4 b、Pm13、Pm20、Pm21、PmXBD、Pm2+6、Pm4+8、Pm2+Mli、Pm4 b+Mli、Pm5+6、Pm1+2+9为目前山西省小麦白粉病菌的有效抗病基因，可供转育利用；毒性基因V1、V2、V3 a、V3 d、V3 f、V6、V17、V19、V2+Ta的出现频率为38.6%79.4%，其对应抗性基因Pm1、Pm2、Pm3 a、Pm3 d、Pm3 f、Pm6、Pm17、Pm19、Pm2+Ta的利用价值已下降；毒性基因V3 b、V3 c、V3 e、V5、V7、V8的出现频率为92.5%~98.7%，其对应抗性基因Pm3 b、Pm3 c、Pm3 e、Pm5、Pm7、Pm8单独使用无利用价值。

The digital frequency source this paper researched uses high integrated DDS chip AD9851 as frequency sources and signal mirac processors AT89C51 as system control center, it can output 10Hz-20MHz signal with high-precision and high stability frequency.

毕业论文字数：15850 页数：36）摘要：随着现代电子技术的发展，高精度数字频率源在通讯、雷达、宇航、电视广播、遥控遥测、电子测量等领域得到了广泛的应用。

The structure parameters of the component are further varied, to obtain multivarious frequency components. The resonance frequency of a component is reduced by filling high permittivity medium, and this makes it possible to keep the design of a component compact at low frequency even.

进一步改变结构参数，可获取不同谐振频率的器件，且可在腔体中填充高介电常数介质来减小器件的谐振频率，克服了以往使用腔体结构在低频段时体积过大等问题。

Firstly, achieving a new low and high cycle noninterfering loading, the high frequency induction local heating, the control of high cycle vibration frequency and amplitude, and the crack propagation real-time detection, an experimental system of L-HCCF at elevated temperature is established. Secondly, under two vibration frequency (50Hz and 100Hz), the contrast experiment of light and serious corrosion disc slots is done. It is found that the experimental L-HCCF life of serious corrosion disc is less than that of light's, but its dispersion is larger, and the experimental failure is identical with the service's.

首先，进行大量试验工作，提出了高低周疲劳载荷的新型加载方案，并解决了高频感应局部加温、振动调频及裂纹实时监测等多个技术难点，建立了涡轮盘全尺寸高温复合疲劳试验系统；验证试验做到了故障再现；接着进行了两种频比（振频50HZ与100HZ）的轻、重腐蚀盘的对比试验；由对榫槽第一齿进行裂纹实时跟踪，得出了枞树型榫槽的复合疲劳裂纹扩展特点规律；对榫齿断口进行的金相分析表明：裂纹首先由第一齿开始，断口系复合疲劳；试验结果显示：重腐蚀盘试验寿命较轻腐蚀盘有显著的下降，而且分散性较大。

The two-mode fiber acoustic-optic nonreciprocal phase shifter consists of twoacoustic-optic frequency shifters same in characteristic and mode strippers, etc. Socharacteristic of the acoustic-optic frequency shifter and the identification of twoacoustic-optic frequency shifters' characteristics are very important.

双模光纤声光非互易相移器由两个性能一致的声光移频器及模式剥离器等构成，因此声光移频器本身的性能如何以及两个声光移频器的性能是否一致非常关键。

Methods Seventy six aged patients with ostalgia caused by primary osteoporosis, whose T numerus less than certified value 2.5 were randomized into two groups: 1. Applying only CT (36 cases); 2. CT combined with Low frequency transduction pulsed electromagnetic fields (36 cases); Two groups simultaneously were given Calcium 600 mg and injected CT 50IU, ten days later injected 50IU every two days in two months, Low frequency transduction pulsed electromagnetic fields treatment was made by Tianjin Jinxitong company, frequency 20-40Hz, and treated 20 minutes by this machine, totally 30 days. Six months later we examined their Bone density again.

将存在骨质疏松性骨痛同时经DEXA骨密度仪检测T值低于标准值2.0以下的老龄原发性骨质疏松症患者76人随机分为两组：①单纯应用鲑鱼降钙素组（36人）；②联合应用药物及低频电磁场组（36人），两组同时每日给予钙而奇D600片1粒，CT按每日肌肉注射50IU，10d后改为隔日肌注50IU连续应用2个月，低频电磁场治疗采用天津金希统公司生产的XT2000B型OP治疗仪，频率为20~40Hz，每天治疗20min，共治疗30d， 6个月后复查骨密度。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"