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1)  Low frequency high strength acoustic wave
低频高强度声波
2)  High frequency and low intensity
高频低强度
3)  Low-frequency and high-inten-sity acoustic field
低频高强声场
4)  low intensity ultrasound
低强度超声波
1.
Study on Bio-effects of Activated Sludge Irradiated by Low Intensity Ultrasound and Its Application;
低强度超声波辐射活性污泥的生物效应及其应用试验研究
2.
The mechanism of biological activity enhancement of sludge by low intensity ultrasound was investigated based on the sludge characteristics before and after ultrasonic treatment, the impact of different ultrasonic treatment patterns, as well as the effect of addition of the radical scavenger NaHCO3.
通过测定超声辐射前后污泥性质的变化,不同处理方式对污泥活性影响以及自由基清除剂NaHCO3加入对超声作用效果影响,初步探讨了低强度超声波辐射对污泥生物活性的影响机制。
3.
This work aims to study the enhancement effects of low intensity ultrasound on biological wastewater treatment in low temperature.
本研究还以典型的城市二级处理污水处理厂和采用SBR工艺的污水处理厂为例,对低强度超声波在污水处理工艺中的设计和操作进行了说明。
5)  Low-frequency sound wave
低频声波
1.
This paper puts forward a method based on online programmable analog device ispPAC10 s deferential amplification and the low-pass filter circuit for realizing the collection of the low-frequency sound wave signal.
提出了基于在线可编程模拟器件ispPAC10差动放大及低通滤波电路来完成低频声波信号的采集。
2.
The low-frequency sound wave is received in the laboratory.
为研究油井管线的声传输过程,测量井底动态参数,根据实际情况设计了一种结构特殊的低频声波换能器。
6)  low frequency sound wave
低频声波
1.
Expenses for repairing and maintenance were reduced after the low frequency sound wave deashing device was used.
经采用低频声波清灰装置,减少了检修和维护的费用。
补充资料:高模量高强度聚合物
分子式:
CAS号:

性质: 常指杨氏模量和断裂强度分别大于100GPa和3GPa的有机聚合物。实现高强高模的途径之一是将柔性高分子进行超拉伸,使卷曲或折叠的分子链拉直,并沿拉伸方向取向成伸直链结晶;另一是合成刚性棒状液晶高分子,从根本上抑制分子链的卷曲或折叠,使分子链构象或分子链间的滑移变形大大减小,外力作用在分子链的共价键上,从而大幅度提高聚合物的强度和模量。这两种方法的代表分别有超拉伸的超高分子量聚乙烯纤维,和液晶芳香聚酰胺纤维,前者的强度和模量已达到4GPa和210GPa,后者已达到2.9GPa和110GPa。

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