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Your search keyword '"Tian, Y. L."' showing total 6 results
Start Over Author "Tian, Y. L." Publisher american institute of physics
6 results on '"Tian, Y. L."'

1. Design, modeling, and testing of a one degree of freedom manipulator with three-stage amplification mechanism.

Author

Guo, Z. Y., Zhang, W. C., Tian, Y. L., Zhang, Z. Q., Cao, Y. R., Lu, X. C., and Zhang, T. G.

Subjects
DEGREES of freedom, FINITE element method, MANIPULATORS (Machinery)
Abstract

The one degree of freedom (1-DOF) manipulator with nano-resolution is a significant component in the micro-/nano-manipulation. In order to simultaneously achieve a large stroke and high precision, a piezo-driven 1-DOF flexure-based manipulator consisting of an enhanced double Scott-Russell mechanism (EDSRM), a lever type mechanism, and a Z-shaped mechanism is proposed in this paper. Analytical models are developed to examine the kinetostatic and dynamic properties of the manipulator. A finite element analysis is further performed to evaluate the characteristics of the EDSRM and the complete manipulator. The prototype is fabricated on monolithic AL7075, and various experimental tests have been carried out to investigate the correctness of the modeling. The experimental results show that the proposed manipulator has a satisfactory amplification ratio, static stability, and dynamic performance. [ABSTRACT FROM AUTHOR]

Published
2022
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2. Synchrotron radiation topography studies of twinning in NdP5O14 crystals.

Author

Huang, X. R., Hu, Z. W., Jiang, S. S., Jiang, J. H., Tian, Y. L., Han, Y., and Wang, J. Y.

Subjects
CRYSTALS, SYNCHROTRONS, X-rays
Abstract

Studies twin structures in NdP[sub5]O[sub14] single crystals using white-beam synchrotron x-ray topography. Details on the experiment; Oriental difference between domains; Details on the image shifts calculation.

Published
1994
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3. Microwave Annealing of Ion Implanted 4H-SiC.

Author

Rao, Mulpuri V., Nath, A., Qadri, S. B., Tian, Y.-L., and Nipoti, R.

Subjects
MICROWAVES, ION implantation, HEAT treatment, SILICON carbide, HIGH temperatures, PHOSPHORUS, DETERIORATION of materials
Abstract

Ultra-fast high-temperature microwave annealing at temperatures as high as 2050 °C for 30 s has been performed on phosphorus ion-implanted 4H-SiC for phosphorus doping concentrations in the range 5×1019 cm-3-8×1020 cm-3. For comparison, inductive heating furnace anneals were performed at 1800 °C-1950 °C for 5 min. Electrical resistivity of the P+-implanted samples decreased with increasing annealing temperature reaching a minimum value of 6.8×10-4 Ωcm for 2050 °C/30 s microwave annealing and a slightly higher value for 1950 °C/5 min inductive heating furnace annealing. X-ray rocking curve measurements showed that the microwave annealing not only removed the lattice damage introduced by the ion-implantation process, but also the defects present in the original virgin sample as well. [ABSTRACT FROM AUTHOR]

Published
2011
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4. Progress on the RFQ1L and LPT.

Author

Huang, W. X., Zhu, Z. C., Tian, Y. L., Wang, Y., Wang, J. Y., Sun, Y. L., Xu, H. S., and Xiao, G. Q.

Subjects
NUCLEAR physics, MASS measurement, SPECTRUM analysis instruments, SPECTROMETERS, UNITS of measurement
Abstract

The SHANS spectrometer is under construction in the Institute of Modern Physics, Chinese Academy of Science. The RFQ cooler and buncher RFQ1L is one of the key devices in the SHANS. To perform direct mass measurement, the Lanzhou Penning Trap LPT is also under construction. In this symposium, the principle of the SHANS, the status of RFQ1L and LPT and some primary test results will be reported. [ABSTRACT FROM AUTHOR]

Published
2010
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5. Note: Decoupling design for high frequency piezoelectric ultrasonic transducers with their clamping connections.

Author

Wang, F. J., Zhang, H. J., Liang, C. M., Tian, Y. L., Zhao, X. Y., and Zhang, D. W.

Subjects
ULTRASONIC transducers, PIEZOELECTRIC devices, ULTRASONIC transmission, PIEZOELECTRIC materials, ELECTROACOUSTIC transducers, FINITE element method
Abstract

This work presents the flexure-mechanism based decoupling design between high frequency piezoelectric ultrasonic transducers and their clamping connections to improve ultrasonic energy transmission efficiency. The ring, prismatic beam, and circular notched hinge based flanges were presented, and the crucial geometric dimensions of the transducers with the flexure decoupling flanges were determined. Finite element analysis (FEA) was carried out to investigate the dynamic characteristics of the transducers. Finally, experiments were conducted to examine and verify the effects of the proposed decoupling flanges. FEA and experimental results show that smaller frequency deviations and larger tip displacement amplitudes have been achieved by using the transducers with the flexure flanges compared with the transducer with a rigid ring-type flange, and thus the ultrasonic transmission efficiency can be improved through the flexure flanges. [ABSTRACT FROM AUTHOR]

Published
2015
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6. Correlation method in period measurement of a torsion pendulum.

Author

Tian, Y. L., Tu, Y., and Shao, C. G.

Subjects
*STATISTICAL correlation, *PENDULUMS, *MECHANICS (Physics), *PHYSICS, *PHYSICAL sciences, *NOISE
Abstract

The correlation method is used to determine the period of a torsion pendulum. Calculation shows that this method cannot only suppress the disturbance of white noise, but it is also insensitive to drift and damping of the torsion pendulum. An estimate of the frequency based on this method is an approximative minimum variance unbiased estimator. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2004
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