Tests and analysis are made for the enlargement air, noise, vibration of tail pipe man door, shaft oscillation under water head of 59m, 64m, 69m, 74m, 79m, 81m and 85m in the light of 200MW hydrogenerator in Ankang Hydropower Sation. Scientific assessment are put forward for noise level, effect of enlargement air equipment and operating stability of the units under different condition, corresponding advises are proposed as well.
The Effect of the Contact Site on Jitter of Signal Voltage in Closed Process of Contact——Ⅰ-Experimental Studies on Vibrating State and Reliability of Electric Contact of Contact System in plate Spring Relay
A series of Fe-Ni-N polycrystalline powder are prepared by co-deposition and nitriding in NH3/H2.The changes of the structure and magnetism are investigated by X-ray Diffraction and Vibrating Sample Magnetometer.
In experiments,the magnetic hysteresis loops of melttextured Yba2Cu3O7-δ were measured by a vibrating sample magnetometer(VSM) at different magnetic-field sweep rates β(β=800,80,8,0.8,0.08G/s respectively) and at a temperature of 52K.
A matrix equation from an inverse problem of vibration theory
The symmetric, positive semidefinite, and positive definite real solutions of the matrix equation XA=YAD from an inverse problem of vibration theory are considered.
Acetone solution-casting films of poly(methylmethacrylate) were analyzed by differential scanning calorimetry and pyrolysis gas chromatography-mass spectroscopy under natural evaporation and ultrasonic vibration, respectively.
The continuous wavelet transform (CWT) is employed to analyze vibration signals obtained from the motor body.
The results of our study indicate that when nano-SiO2, using KH-550 silane as a coupling agent, was added to UF resin by discontinuous ultrasonic vibration, its properties improved effectively.
We compute their H?lder regularity and oscillation at every point and we deduce their spectrum of oscillating singularities.
Mean oscillation of functions and the Paley-Wiener space
Ideal weights: Asymptotically optimal versions of doubling, absolute continuity, and bounded mean oscillation
We first show that if p>amp;gt;1, thenQp(?Δ)=BMO(?Δ), the space of complex-valued functions with bounded mean oscillation on ?Δ.
In this paper, we investigate the complex oscillation of the differential equationf"+B1f'+B0f=F, whereB0,B1,F≠0 are finite order meromorphic functions having only finitely many poles and the order ofB1 is larger than that ofB0.
The CH2 segments are in a mobile state because of the enhanced stretching and twisting vibrations of the C-CO and C-N bonds.
In this paper, vibration utilization is classified into linear or nonlinear vibrations, waves, and electric-magnetic oscillations.
Environmental problems of vibrations induced by railway traffic
In this paper, a general review is made on the problems of vibrations of the ground and nearby buildings induced by railway traffic, and on the researches on this subject in theoretical analyses, numerical simulations, and field experiments.
The characteristics of ground vibrations induced by railway traffic and their propagation, from the aspects of duration, intensity distribution, vehicle load and speed, are summarized.