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Efficient processing power harmonic noise with fluctuation frequency in urban transient electromagnetic surveys

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (4)

Power harmonic noise is the main noise interference source in transient electromagnetic (TEM) surveys in the urban environment. State of the art techn......

Microparticle sorting with a virtual optical chip

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (5)

We proposed an automatic sorting method based on a virtual optical chip, which was formed by a complex-amplitude beam shaping system. The automatic so......

A new method for detecting heteromorphic workpiece brazing layer quality based on thermal probe

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (8)

Traditional brazing quality inspection methods find it difficult to detect brazing layer defects on heteromorphic workpieces. Thus, a non-destructive ......

A high-efficiency wideband coupler for nanosecond-level pulsed current injection

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (4)

Pulsed current injection (PCI), as a conducted vulnerability testing technique under nanosecond-level transient electromagnetic disturbance (TED), has......

Modeling and verification of life prediction of a V-shaped linear ultrasonic motor

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (4)

In this paper, a wear model is established for a V-shaped linear ultrasonic motor. The influence of the change in the dynamic friction coefficient and......

System-on-chip upgrade of millimeter-wave imaging diagnostics for fusion plasma

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (5)

Monolithic, millimeter wave "system-on-chip" technology has been employed in chip heterodyne radiometers in a newly developed Electron Cyclotron Emiss......

A resonance suppression method in platform style inertial reference unit via particle swarm optimization notch filter

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (5)

With the development of laser communication, remote sensing imaging, and other technologies, an inertial reference unit (IRU) plays an essential part ......

Improvement of the ultra-low-frequency active vertical vibration isolator with geometric anti-spring structure for absolute gravimetry

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (5)

For absolute gravimeters, which play important roles in geophysics and geological exploration, an ultra-low-frequency vertical vibration isolator is n......

Design and operation of a transportable Rb-87 atomic fountain clock

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (5)

A transportable fountain clock with high reliability is important for high-precision time-frequency measurements. Because of its relatively small cold......

Analytical design and experiment of radial inductive displacement sensor with full-bridge structure for magnetic bearings

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (6)

In magnetic bearing systems, the air gap between the stator and the rotor is generally measured with an eddy current displacement sensor. However, the......

Parameter estimation for a damped real-valued sinusoid in noise

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (8)

In this paper, a three-point interpolation algorithm based on the discrete Fourier transform (DFT) is presented for a damped real-valued sinusoid, and......

Development of a hydraulically controlled piston-pressurized pulsed water jet device and its application potential for hard rock breaking

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (8)

To improve the efficiency of hard rock breaking by a pulsed water jet (PWJ), a hydraulically controlled piston-pressurized PWJ (HCPPPWJ) device has be......

Powder conductor for pressure calibration applied to large volume press under high pressure

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (7)

Pressure is the core of high-pressure science and technology, and the accuracy of pressure calibration is of much importance for high-pressure experim......

Ultrafast extreme ultraviolet photoemission electron microscope

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (4)

Here, we report our newly built table-top ultrafast extreme ultraviolet (EUV) photoemission electron microscope. The coherent ultrafast EUV light is s......

Flow visualization and density measurement of the supersonic molecular beam for fusion plasma fueling

期刊: REVIEW OF SCIENTIFIC INSTRUMENTS, 2021; 92 (4)

The supersonic molecular beam injection (SMBI) technique is widely used in magnetic fusion devices for plasma fueling and active control of particles.......

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