查询词典 ultrasonic

Method］With the stem and leaf of Andrographis panniculata as the material, after crushed the andrographolide from them was extracted with ultrasonic method in sodium hydroxide solution at different pH value.

方法］以穿心莲茎叶为材料，粉碎后在不同pH值的NaOH溶液中，利用超声波法提取穿心莲内酯。

The angle of beam is defined by the angle through which the energy of the ultrasonic pulse is reduced of 33% of its maximum value.

束角的定义是通过它的超声波脉冲能量为33％，其最大值减少的角度。

Apple seed oil;ultrasonic-assisted extraction;fatty acid composition

苹果籽油；超声波辅助提取；脂肪酸组成

A silent communications system in which nonaural carriers, in the very low or very high audio-frequency range or in the adjacent ultrasonic frequency spectrum are amplitude- or frequency-modulated with the desired intelligence and propagated acoustically or vibrationally, for inducement into the brain, typically through the use of loudspeakers, earphones, or piezoelectric transducers.

在一个无声的通讯系统中，一个非常低或者非常高的音频，或者接近超声波的频率，其波幅或者频率被调节到具有相当被理解能力并以合适的振动方式或者以听觉传输的方式来刺激一个昏睡者的大脑。典型的装置是用扬声器，耳麦，或者变压器。

Following, a experiment has been carried out, the incident waves with a frequency band of 200kHz-3 50kHz are used to the experiment, and a series of peak value-time curves are drawn each 10kHz, corresponding time are found through fitting peak value, thus the position of the defect is calculated accurately. The application of awl-shaped sensor head in the heat change water pipe experiment indicates that the ultrasonic guided waves may transmit nearly 50 meters in the pipe, which is not influenced by the elbows and makes it possible to test defects in long distance and large-scale. The water-load pipe experiment indicates that the displace and energy maybe leakage at the near-surface, which is significant for the further research.

而后，采用200kHz至350kHz频段的入射波进行了实验验证，并每隔10kHz绘出一条峰值一时间的曲线，通过拟合峰值点，找到对应的时间，从而准确的计算出了缺陷的所在；应用锥形探头的热交换水管的实验表明，超声导波可以在管道中传播了近50米的距离，且不受弯头的影响，从而使得长范围、大规模检测成为可能，水载管实验说明了离面位移和能量可能会发生泄漏的特性，为导波的深入研究和应用作了铺垫。

If not carried out before the B-type ultrasonic inspection, this inspection is very necessary.

如果之前没有进行B型超声波检查，这时检查是很必要的。

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As well as a well-trained workforce; leading products have: 1200W-3200W power range of the ultrasonic welding plastic; foot double needle micro precision spot welder; battery voltage tester with overcast; lithium battery protection board testing equipment.

以及一支训练有素的员工队伍；主导产品有：1200W-3200W各种功率的超声波塑料焊机；脚踏双针微电脑精密点焊机；电池电压内阴测试仪；锂电池保护板测试仪。

The third,when ultrasonic transmiss in different bed plane on sandstone,P-wave and S-wave velocity and attenuation have different change.

第三，超声波在砂岩不同的层理面方向传播时，纵、横波的速度和衰减发生了不同的变化。

According to this, the author applied wavelet transform to image restoration, enhancement, encoding, edge detection of the ultrasonic imaging well logging, and to attitude computation of tilted fracture and bed plane from well logging image.

在此基础上，将小波变换应用于超声成像测井图像恢复、图像增强、数据压缩编码、边缘检测以及倾斜裂缝和层面产状计算中。

Having a completely stress free existence is probably out of reach.

想让生活完全没有压力几乎是不可能的。

The Xanadu is said to be descendants of the Ming dynasty warrior settlements.

这个世外桃源据说是明朝侠客后裔的聚居地。