超声波频率

The application of oscillograph principle in ultrasonic imaging is based on the electronic oscillograph imaging principle.

示波器原理在超声成像中的应用是以电子示波器的成像原理为基础，通过医用超声换能器将以机械波形式存在的超声波转换成同频率的交变的电信号，将该信号以不同的方式输入示波器中，从而形成了不同方式的超声图像。

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世界上第一台家用洗牙产品--皓丽来微电脑洗牙仪，完全打消了人们去医院洗牙的种种顾虑，解决了去医院洗牙的六大弊病，成了人们洗牙的最好选择，皓丽来微电脑洗牙仪充分吸收前人科学成果，采用国际最新超声波技术，独特的CHAMPION安全频率，人性化的设计，超强的功能，方便简捷的操作，全心保护您的牙齿健康，还你一口好牙，给你一口清新怡人的口气！

And the influences of glutin and sodium dodecyl sulfate as dispersant on the cobalt powder grain are investigate.

在333K、pH=3.5～4.5、频率为40kHz的超声波条件下通过改变电流密度和电解液浓度，得到超声电解法制备超细钴金属粉体粒度的变化规律。

USM will try to enhance high frequencies, which is not something that I want.

超声波马达将努力提高高频率，这不正是我想要的。

ML dichlorovs(30 mg/L) is oxidized by ultrasonic in 100 mL beakers. When power is 200 W,600 W and 800 W,the removal is low,for the largest removal is less than 20% at the treatment of 60 min, while the removal is 48% when power is 1000 W. On the mean while, cost raises a lot. Consequently, treatment of dichlorovs by ultrasonic is worthless.

超声波法在频率20 kHz，声强为0.3 W/cm2，0.9 W/cm2和1.4 W/cm2（对应的超声功率分别为200 W，600 W和800 W）的条件下处理60 min时的敌敌畏的最大去除率都不超过20％；声强为1.7 W/cm2（1000 W）处理60 min时去除率达48％，但此时处理成本较大，不具实际应用价值。

According to the ultrasonic motors chich were proposed and designed in our laboratory, a novel driving circuits has been developed and it can generate signal with the frequency ranging from 10 to 100 kHz, the value of Vp-p below 180 V.

该驱动电路由干电池提供直流电源，产生频率范围为10-100 kHz，电压峰峰值为0-180 V可调的超声波信号。

Echolocation calls are usually ultrasonic ranging in frequency from 20 to 200 kilohertz Hz , whereas human hearing normally tops out at around 20 Hz .

用于回声定位的叫声一般是20－200千赫之间的超声波，而人所能听到的最高频率在20千赫左右。

The invention takes linseeds as the raw material, the solvent is used to extract the linseed oil under the ultrasonic that the frequency is between 20 and 100 kHz and the strength is between 1 and 40W/cm.

本发明以亚麻籽为原料，在频率为20-100kHz，强度为1-40W/cm 2 的超声波下用溶剂提取亚麻油。

A new kind of driving circuit is designed, it realizes driving and frequency tracking of USM.

本文研究并设计了一种新型的驱动电路，用以实现超声波电机的驱动和频率的自动跟踪。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新