Non-radial oscillations of rotating stars and their relevance to the short-period oscillations of cataclysmic variables We consider the usual hypothesis that the short-period coherent oscillations seen in cataclysmic variables are attributable to g modes in a slowly rotating......
A period of 235 lunar months, or about 19 years in the Julian calendar, at the end of which the phases of the moon recur in the same order and on the same days as in the preceding cycle. [AfterMeton(fl. fifth centurybc), Athenian astronomer.] ...
CCD observations of P/Tempel 2 made with the 0.9 m telescope on Kitt Peak within a time span of 2 months (October and December 1994), postperihelion, show that the rotational period of this object has changed by a small but significant fraction. Fourier transform methods as well as ...
Postnatal development of hippocampal function has been reported in many mammalian species, including humans. To obtain synaptic evidence, we analyzed developmental changes in plasticity after an inhibitory avoidance task in rats. Learning performance was
aTo estimate the probability of a false alarm when scaled and rotated versions of the target models are allowed in the matching process, the discretization of the transformation space must be considered. Rotating and scaling the object model does not move every pixel a uniform distance as ...
This paper presents realizing technique of digital frequency multiplying device,on the basis of introducing the meaning of rotating machinery vibration signal collection and technique of the full period sampling. 在介绍旋转机械振动信号采集的意义和整周期采样实现方法的基础上,提出了采用数字倍频器加以实现的...
In some cases, the radio pulses have been interpreted as coming from rotating neutron stars with extremely strong magnetic fields, known as magnetars; the origin of other, occasionally periodic and less-well-sampled radio transients is still debated3. Coherent periodic radio emission is usually ...
2.During complete period sampling of vibration signals in rotating machinery, the existing method for computing the sampling frequency takes the rotor present turn s angular velocity as the next turn s.旋转机械振动信号整周期采样时 ,计算采样脉冲输出频率的方法一般是把这一转的转速作为下一转的转速来计...
a机器人永远不会觉得疲倦,它们将会做与人一样的事 The robot never can think wearily, they will be able to do with the human same matter [translate] adiameter of swing measured between tips of opposite tubes when in rotating position, in. 摇摆直径测量了在相反管之间技巧,当在转动的位置, in。
Rotating speed of grinding wheel (r/min)2000-10000(stepless speed regulation) Motor power of workpiece(kw)4 Motor power of grinding wheel(kw)5.5 Motor power of X-axis servo motor(kw)2 Motor power of Z-axis servo motor(kw)4 The power of oil pressure motor...