声强

共振干涉法声速测定中声强减损的讨论

Derogation of intensity of sound in measuring sound velocity by resonance interference method

dsp技术在声强测试系统中的应用

Application of DSP Technology in Sound Intensity Test System

声强测试系统中DSP和ADC的接口电路

A Practical Interface Between DSP and ADC in Sound Measurement System

基于USB的多维声强数据传输技术研究

Research on multidimensional sound-intensity transmission using USB

超声－过氧化氢（US－H2O2）组合可以提高苯酚的降解效果，在实验范围内声强越大、过氧化氢含量越高、苯酚降解率越高。

The ratio of phenol degradation can be improved by the combination of US-H2O2 , and increases with increasing ultrasound intensity and H2O2 concentration .

研究了基于双通道FFT分析仪的虚拟式声强测量系统的原理与组成。

The principle and composing of virtual sound intensity measurement system based on two-channel FFT analysis are researched .

超声声强为0.5W/cm2或0.75W/cm2介导的转染效率，在统计学上差异无显著性意义。结论浓度适当的微泡在优化的声强条件下，能够有效地提高DNA质粒在RB细胞中的转染效率。

Conclusion The efficiency of DNA vector transfected into RB cells could be increased obviously by optimum ultrasound intensity and microbubbles dosage .

影响降解率的主要因素有：超声波频率、超声波声强、溶液的pH值、溶解气体的物理性质和污染物自身性质。

The main effecting factors on the degradation rate include follows : ultrasonic frequency , ultrasonic sound intensity , pH value , the presence of gases in solution and pollutant .

基于DSP的实时互谱声强测量系统的研究偏端霉素衍生物与DNA相互作用的圆二色谱测定

Research on the DSP Based Real-time Sound Intensity Measurement System by Use of the Two-microphone Cross Spectral Method ; Investigation on interaction between distamycin derivatives and DNA by circular dichroism spectroscopy

分析DFT泄露误差对声强测量的影响，进行模拟计算。

The influence of the DFT leakage errors on the sound intensity measurement is analyzed and the simulation examples are presented .

研究了US（超声波）/O3（臭氧）体系中气速、温度、pH值、对硝基苯酚初始质量浓度以及超声声强对对硝基苯酚降解速率的影响。

The effects of gas flow rate , temperature , pH value , initial mass concentration of 4-nitrophenol solution , and ultrasonic intensity on the decomposition efficiency of 4-nitrophenol by ultrasonic irradiation and ozone were studied .

水声探测技术在舰船RCS测量中的应用矢量传感器的复声强法定向技术研究

The application in RCS test of ship with water-sound detection technology Study of Direction Estimation Based on Intensity Measurement Using Acoustic Vector Sensor

文中讨论了用自谱函数计算表面声强频谱的方法，并基于这种分析方法在IBM-PC上研制了一套分析所测噪声信号的通用软件。

The noise signal measured is analyzed with a common software developed and satisfactory results have been obtained .

同时考察了时间、声强、pH、2,4-二氯苯酚初始浓度、反应器的直径和纳米铁粉的投加量等对协同反应降解效果的影响。

At the same time , all kinds of effect factor e.g. : time , power intensity , pH , initialing concentration , the diameter of reactor and quantity of nanoscale iron was introduced .

研究了超声波降解水中二甲苯的降解效果，详细探讨了反应容器及沸石、声强、超声时间、H2O2投加量、温度、pH值等因素对降解二甲苯的影响。

The effects of reaction vessel , sonic intensity , sonication time , initial concentrations of H_2O_2 , solution temperature and pH on ultrasonic degradation of xylene were studied .

LMSCADA-X中声强分析软件及其应用

LMS CADA-X Acoustic intensity analysis software and its application

进一步分析显示，受抑制IC神经元的三类RIF均被抑制，且这种抑制作用随着声强增加而逐渐降低。

Further study show that three types RIF were all inhibited and the inhibited impact was gradually decreased with the sound intensity increasing .

在比较了这两种传感器测量结构声强的结果后，得出结论：PVDF传感器测量结构声强是可行的。

Finally , an experiment that compares the two kind of methods is done , and conclusion that : PVDF sensors is feasible to measure structural intensity .

文章介绍了声强测量的基本概念、双传声器法测量技术及作者开发的SIMS声强测量系统。

The article introduced basic concept of noise intensity testing , double noise sensor testing and newly developed SIMS noise intensity testing system .

本文采用表面声强测量及其频谱分析方法对华中工学院激光研究所研制的5kW横流电激励连续CO2激光器的噪声源进行识别。

Working noise sources are identified for a5KW transverse flow CW CO2 Laser made by Laser Institute of Huazhong University of Science and Technology .

研究了超声及超声&过氧化氢联合技术降解4－氯酚的效果，详细探讨了影响超声降解4－氯酚效率的因素：声强、溶液pH值、4－氯酚的初始浓度和自由基清除剂。

The degradation effect of p-chlorophenol in aqueous solution by ultrasound-hydrogen peroxide technology and the major affecting factors such as the sound intensity , pH value of the solution , initial concentration and free radicals scavenger were studied in this paper .

结果表明：降解过程中声强、pH值，溶液的初始浓度、反应温度都会对结果产生一定影响，超声与其他方法结合以及复频超声的协同作用，都会使反应进行彻底。

Results show , sound intensity , pH value , initial concentration of solution , reaction temperature can affect result on the course of degradation , combining ultrasonic and other methods , synergistic action of complex-frequency ultrasonic can make reaction exhaustivity .

研究了US（超声波）/UV（紫外光）协同催化氧化水中苯酚的降解效果，考察了超声波声强、溶液pH值、反应温度和催化剂投加量对苯酚降解速率的影响。

Phenol solution was treated by US ( Ultrasound ) / UV ( Ultraviolet ) synergetic catalysis technology and the major influencing factors such as the sound intensity , initial pH value of solution , the amount of catalyst and reaction temperature were examined in this paper .

采用功率超声的新方法，研究了超声波功率、频率、声强、变幅杆直径、溶液初始pH值以及空化气体种类等因素对降解甲胺磷农药废水的影响。

A new method of ultrasonic irradiation was used to study the effects of such factors as ultrasonic power , ultrasonic frequency , ultrasonic intensity , probe diameter , initial pH value of solution and cavitating gases type on degradation of methamidophos pesticide wastewater .

以大鼠为实验对象，研究了在不同声强、不同时间暴露下的大鼠肝中天冬氨酸转氨酶（AST）和丙氨酸转氨酶（ALT）活性的变化。

Objectives To study the effects of Chinese herbal medicine on adjusting changes in activities of AST and ALT in the liver of rats exposed to noise with varied intensity and length .

采用pp法计算声强时，需要将两声器测得的声压进行平均作为被测点的声压，将两声压进行差分计算来间接获得声振速。

When calculating the power of sound source using the p_p strategy , the sound pressures obtained via two microphones should be averaged to get the average sound pressure of the estimated point , and from the differential of the two sound pressures the sound vibrating speed can be derived .

目的观察不同声强高强度聚焦超声（HIFU）损毁兔腹腔神经节的效果。

Objective To investigate the ablative effect of high intensity focused ultrasound ( HIFU ) on the celiac ganglion ( CG ) and the subsequent change in gastro-intestinal ( GI ) function .

不同声强超声波对细胞骨架微丝F-actin表达的影响在细胞融合过程中，有微丝骨架纤维与穿壁转移的染色质和细胞器相连。

The expressions of cytoskeleton filament F-actin of EVC-304 cells exposed to ultrasound in different intensities And the chromosomes and organelles were successively connected with actin filaments during cytomixis .

在试验样机上布置测点，用固定杆将声强探头定位在测点处，采集得到数据，然后由PULSE分析软件声强模块对数据进行频谱分析处理，找出噪声分布情况，确定噪声源。

Arrangement of measuring points in the experimental prototype , to acquired data with a fixed rod will sound intensity probe positioned at the measuring points , then analyzed by PULSE software sound intensity spectrum analysis , to find out the distribution of noise , to identify the noise source .

对冰块样品的实验表明，利用5W／cm2声强的超声可以达到300mm／min的破穿速度。

For the ice block samples , the 300mm / min of breaking through velocity can be reached only with ca. 5W / cm 2 of the low or high frequency ultrasound .