查询词典 combination frequency

Because the traditional wireless microphone uses the frequency low silent chain, all is analyzes the radio-frequency signal the intensity, therefore they cannot and need the noise the signal differentiates; In the noisy radio frequency environment (for example digital equipment and so on CD/VCD/LD send out massive overtones) under use, when this launcher signal weak or closure, the silent chain possibly can open suddenly, the receiver can send out the intense demolition noise.

传统无线麦克风因采用频率低的静噪电路，都是分析射频信号的强度，所以它们不能把噪音和需要的信号区分开来；在嘈杂的射频环境(如CD/VCD/LD等数码设备散发出的大量谐波)下使用，在该发射器的信号微弱或关闭时，静噪电路可能会忽然打开，接收机就会发出强烈的爆破噪声。

The main peaks of the EEG power spectra were in delta and theta frequency range. In the stage of ethanol exposure, the rats exhibited much more act of attack than the control, the alpha waves of EEG decreased, while the delta waves increased. The EEG power spectra analysis showed the delta power increased and the theta power decreased. In the stage of ethanol withdrawal, the rats showed some withdrawal behaviors such as wet dog shakes, sniffing, groomingand tonic-clonic seizures for audiogenic stimulus. Spikes and spike-slow waves were found in the EEG. In power spectra analysis, the delta power decreased while the alpha and the theta power increased, the EEG frequency band moved to the high-frequency rang. These changes were found obviously on the sixth day and disappeared on the 1 Oth day after the ethanol was removed.

本研究发现：1、对照组大鼠行为无异常，伏核EEG以α节律为主，散在出现δ和θ节律；功率主峰在δ和θ频段范围，整个过程中未发现手术对伏核EEG及脑电功率谱有影响。2、在慢性饮酒过程中，大鼠攻击性行为增加，伏核 EEG的α节律明显减少，散在出现的高幅慢活动δ波逐渐增多，功率谱分析表明δ频段功率百分比明显增加，而θ频段功率百分比明显减少，总功率减少。3、停饮后，大鼠出现湿狗样抖动、打喷嚏等撤药综合症，并且高频声音刺激能引发惊厥；伏核EEG出现棘波和棘慢综合波，并持续增多，功率谱分析显示δ频段功率百分比 5 南京医科大学硕士学位论文逐渐减少，而0和以频段功率百分比逐渐增加，总功率增加。

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。

Therefore, established a finite element Stable response model of a horizontal whole string and carried out t the safety varied frequency of gas well after researched the natural seriously transversal vibration and compressional vibration frequency range of tubing string with packer and packerless, so that it make the tubing string to avert the covibration frequency range of natural gas excited.

本文认为以某井高产量稳产时，天然气对油管柱的外激励为简谐激振，因此研究中建立某水平井全井段油管柱稳态响应的有限元力学模型，并获得了在无封隔器和有封隔器情况下的油管柱发生严重横振和纵振的频率范围，提出了天然气安全调节频率范围，使油管柱避开可能引起严重破坏的天然气激励频率区域。

It tells particularly the debris flow"s the encironment and the development characteristic by numbers . And according to its character , selecting the latest research results at present , the anthor calculates the debris flow"s the moving , dynamical characteristics and the scale , such as , the velocity of flow , the wallop , the peak value flux , and the total flux . And the anthor calculates density in different design frequency by the empirical formula method . In the text, the author uses the modle of evaluating a single gully to evaluate the risk of the debris flow . First , the author calculates the hazard degree in different design frequency , and forecasts the risk range of debris flow in Shenjia gully based on the maximum pile thickness and the total solid amount of a denbris flow . Then , on the basis of the risk range in different design frequency , the author carries out the damageability and risk assessment . The basic purpose of risk management is reducing risk or transferring risk , reducing the loss of life and property . The text constructs the system of risk management of debris flow in Shenjia gully , basis on the condition of Shenjia gully .

本文从地形地貌、地层岩性、地质构造、气象水文等方面系统地阐述了深家沟泥石流的发育环境及发育特征；分别从形成区、流通区、堆积区对深家沟流域特征进行描述；依据泥石流沟自身特点，选用现阶段最新的研究成果，推算了不同设计频率下的深家沟泥石流流速、峰值流量、总流量、冲击力等动力特征和规模数据；并且根据经验公式法来确定深家沟不同设计频率下的泥石流容重；本文采用单沟泥石流风险评价模型对深家沟泥石流进行风险评价，首先对不同的设计频率下的深家沟泥石流进行危险度评价，根据最大堆积厚度与一次泥石流冲出量来预测不同频率下的泥石流危险范围，然后，根据预测的评估范围，评价对应范围内的易损度，最后作出风险评价；城镇泥石流风险管理的根本目的是降低风险或转移风险，减少生命财产的损失，本论文根据泸定深家沟泥石流的具体情况，构建了深家沟泥石流风险管理体系。

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 witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。