harmonic造句
151. Second harmonic fragrance: Magnolia grandiflora. Magnolia emit bright light shines in the gorgeous spring day. By jasmine and orchids, it shows Magnolia precious aroma.
152. The PWM control strategy with 3-th harmonic in addition is presented for four-leg three-phase inverter, the inverter can deal with unbalanced load and has a high utilization of dc bus voltage.
153. Using the method of firing angle prediction, steady sinusoidal output voltage with low harmonic components can be generated.
153.try its best to gather and build good sentences.
154. This paper presents a new control strategy to eliminate second harmonic of dc output current in the 3-phase unbalanced network voltage PWM current-source converters (CSC).
155. The detection of main harmonic sources is one of the important branches of harmonic analysis.
156. A harmonic oscillator with time dependent frequency is studied using double wave function theory.
157. Thus far we have negated frictional effects in the harmonic oscillator.
158. The spontaneous emission spectrum is numerically calculated by using harmonic expansion and matrix inversion.
159. Realizing ideal switch angle would cause switch angle error in the selective harmonic elimination technique of inverter.
160. Usually the fixed capacitor and passive filter are applied to compensate reactive power and harmonic current.
161. A proof of existence of primitive functions of a continuous function with area principle is introduced, and the divergence of the harmonic series in area method is also proved.
162. The problems of the second harmonic and three coupled waves in homogeneous lossy nonlinear dielectric are analysed.
163. The large capacity generator reconstructed is imported and its3rd harmonic voltage is low.
164. The motion of the balance wheel of a watch is an example of angular harmonic motion.
165. Starting from the Lagrange function of the electromagnetic field, we applied Fonrier transform, obtained the unity theory for the variation fundamental in the harmonic electromagnetic field.
166. The calculation is very simple when the effects of only first harmonic are taken into account.
167. We've done this before-- this is the conservation of energy, and in order to find the period of the simple harmonic oscillation, we take the time derivative.
168. The space harmonic expansion technique is used for analyzing the 3D magnetic fields of the deflection yoke.
169. In order to improve harmonic conversion efficiency and eliminate walk-off effect, temperature field of nonlinear crystal was accurately calculated.
170. The problem of study on fatigue strength of flexible wheel which mainly influence life of harmonic drive is one of the most important research of harmonic gear drive.
171. This paper points out two mistakes of Zhang Hui's article, which is "infinite series with divergence and convergence". This shows that harmonic progression is still divergence.
172. We have studied the method of eliminating the harmonic wave of SCR regulating-speed device a servosystem and increasing its power supply unit' s loading ability when its current is large.
173. KIWA synthetic power saver with his unique structure form eliminates higher harmonic of the electrical network by way of the balance in adjusting three-phase current and voltage .
174. Based on transfer matrix method(TMM)and virtual boundary element method(VBEM), proposed a direct solution to 2-D sound-structure interaction problem under harmonic excitation is proposed.
175. To study the effect of gravity eccentricity on the ranges, the expression of gravity was educed using spherical harmonic function when the earth is considered as an normal ellipsoid or sphere.
176. Harmonic wave analysis method is the insulator medium consume factor on line method and discussed hte effect on the main factor of the medium consume on line supervision precision.
177. The invalidation of the harmonic gear drive is mostly the fatigue rupture of the flex spline.
178. We can work out positions of a harmonic oscillator by numerical methods.
179. This paper describes the measurement of coherent harmonic emission, the synchronization of seed laser with electron beam, and the gap control of the optical klystron.
180. Simulation results show that the theoretical analysis is valid and the presented compensation method has good characteristics in harmonic interference and voltage regulation.
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