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1, The natural period of vibration, the displacement at the top of building and rotation angle of each floor and mode shape are obtained from the elasticity analysis.

2, The results show that semi-rigid connections make the natural period increase. However, the calculated earthquake action is less.

3, It is important to select reasonable natural period of high-rise building in seismic design.

4, For a system with a fundamental natural period in the long-period range,(http://sentencedict.com/natural period.html) maximum displacement governs the seismic design.

5, According to axially natural period, the relation of the dynamic magnification factor vs the linearly loading time under linearly loading is deduced and presented.

6, In group A, when the eggs ripe in natural period, IUI was used.

7, By presenting the air buoyancy decreasing coefficient and referring to tests, the natural period of heaving and some dynamic properties are discussed.

8, Therefore, in the design and research of FPSO in shallow water, the effects of the shallow water depth should be taken into account for determining the natural period of motions.

9, Methods Use ultrasound B to observe ova developement of 70 patient's 72 natural period and 50 drug ovulation period.

10, Result indicates: Structural displacement response is largest as inputting Tianjin seismic waves, for its characteristic period is closed to the natural period of vibration of the model.

11, S(subscript RDR) was not strongly dependent on soil types, natural period and ductility factors. Bilinear factor is the most significant parameter controlling S(subscript RDR).

12, It is pointed out that birth pulses provide a natural period or cyclicity that makes the dynamic behaviors more complicated.

13, The magnitude of the response to impact on the basis of the one, degree of freedom model, and the ratio of the peak value of response to natural period of system is investigated.