Model 941B ultra-low frequency vibration gauge;

Research on ultra-low frequency moving-coil servo accelerometer;

Study on technology of fiber optic sensor for absolute vibration with ultra-low frequency;

Mechanism analysis of ultra low frequency inter-area oscillation;

This paper introduces the principle and specification of Model 991 ultra low frequency vibration gauge.

This paper puts forward the practical methord of realizing ultra low frequency vibration sensor by means of magnetoelectric speedometer,through the series type correcting circuit,the measurable minimum frequency is reduced to less than 0.

It was showed that the gas went into the second section with a lot of heavy-composition liquid, which the impeller was impacted and the super-low frequency vibration of the rotor was made.

Study and Implement of Dedicated System for Detecting ULF Absolute Vibratory Signal;

Intelligence ULF Frequency Characteristic Tesfer;

An electric line-current antenna grounded to the earth at each end is used as the artificial ULF/ELF electromagnetic source for geophysical prospecting.

Optimization design of motion-induced noise of ELF H-field cable antenna;

Design and Realization of ELF Active Bridged Differentiator Notch Filter;

Degradation of azo-dye Acid Red B in aqueous solution by cast iron combined with low frequency ultrasound;

Effects of low frequency ultrasound treatment on the expression of tumor necrosis factor-α in C6 glioma cells;

Objective To investigate the effect of low frequency ultrasound at 1MHz with different power and illumination time on the blood-brain barrier (BBB)and the cortic neurons of rats to seek the optimum sonication condition to open BBB.