According to the method of detection and classification used in mine-hunting sonar,target strength and acoustic shadow are two main acoustic features of sea mine.

The results show that the noise impact on residents along the line is larger than that on people in business buildings or schools along the line, and it is more difficult for residents to take measures to mitigate the noise impact.

Based on many existing results of different studies, this paper puts forward a simple theoretical calculation method for the noise impact of URT,obtains the scope and extent of noise impact of different laying modes.

Successful veterinary application of 3%hydrogen peroxide solution instead of con-ventional co ntrast agents for echocardiographic acoustic contrast is reported in this paper for the first time.

Contrast-enhanced ultrasonography improves diagnosis of renal VX2 tumor in rabbits;

Effect of blunt hepatic trauma with percutaneous radiofrequency ablation by contrast-enhanced ultrasonography;

Development in application of contrast-enhanced ultrasonography in gynecology and obstetrics;

Comparison between contrast enhanced ultrasound and colour Doppler ultrasound differentiation diagnosis of hepatic tumors;

Contrast enhanced ultrasound for diagnosis,therapy screening and treatment of abdominal parenchymal organ trauma;

Objective To evaluate the value of contrast enhanced ultrasound in diagnosis of small focal liver lesions in an early stage.

Quantitative evaluation of liver cirrhosis using contrast-enhanced ultrasound:an experimental study;

Contrast-enhanced ultrasound in diagnosis of liver occupying lesion;

Contrast-enhanced ultrasound for assessment and follow-up of percutaneous quantified ethanol injection in hepatocellular carcinoma;