| 1. | Effective methods of high - rise framework structure period ratio control
高层框架结构周期比控制的有效方法 |
| 2. | Because selective period of chloroplast transformation was longer than that of the nuclear transformation , only the several weakly regenerated plants with spectinomynic resistantance were obtained
由于叶绿体转化植株生长较为缓慢，筛选周期比细胞核转化长，并且一段时间后会出现白化现象。 |
| 3. | “ the product cycle has been longer than it should have been , ” he said in an interview with the financial times . “ in terms of significant new innovation between releases , it ' s been a long wait
“这个产品周期比它应有的时间要长， ”鲍尔默先生在接受《金融时报》采访时说， “就产品版本间的重大创新而言，它让人等了很久。 ” |
| 4. | Comparing with small tank , the sloshing in large tank includes not only fundamental mode but also higher modes and its fundamental period is much larger than that of small tank
从与小体积罐的比较可以看出，大型储液罐的液面晃动不只是以基本振型为主，前几阶振型对液面晃动的贡献也比较显著，并且液面晃动的基本周期比小体积罐的大很多。 |
| 5. | The control of lateral - torsional coupled seismic response of structures is discussed . the analysis on unilateral , bilateral and lateral - torsional coupled seismic response of base - isolated structures with sliding friction bearings is carried out . the influence on lateral - torsional coupled seismic response of base - isolated structures due to the excentricity and the uncoupled period ratio of the superstructure is investigated , and the control of lateral - torsional coupled seismic response of structures is discussed
对摩擦滑动支座基础隔震结构进行了单向及双向地震反应对比分析，研究了结构平?扭耦联地震反应，分析上部结构的偏心距及非耦联周期比对结构的平?扭耦联地震反应的影响，探讨了对结构平?扭耦联地震反应的控制。 |
| 6. | The analysis on unilateral , bilateral and lateral - torsional coupled seismic response of base - isolated structures with lead rubber bearings is carried out . the maximal displacement of the bearings is studied . the influence on lateral - torsional coupled seismic response of base - isolated structures due to the excentricity and uncoupled period ratio of the superstructure , and the excentricity of the isolation system is investigated
对铅芯叠层橡胶支座基础隔震结构进行了单向及双向地震反应对比分析，并研究了支座最大位移的确定；对结构进行了平?扭耦联地震反应分析，研究上部结构的偏心距及非耦联周期比、隔震层偏心距等因素对结构的平?扭耦联地震反应的影响，并对结构平?扭耦联地震反应的控制进行了探讨。 |
| 7. | The stiff floor structure has bigger displacement and smaller internal forces . under seismic forces , frame with eiastic fioor has bigger vibration period , and takes on complicated modes of vibration . due to the big vertical rotation , structure with elastic floor shows more prominently coupling vibration of bending rotating and twisting
如，弹性楼板的结构位移比刚性楼板结构的位移大，内力也是弹性楼板结构的大；在地震力作用下，考虑弹性楼板变形的空间框架振动周期比刚性楼板框架长，而且其振型表现得也比较复杂，由于竖向扭转位移较大，弹性楼板结构表现出更明显的弯扭耦联振动。 |
| 8. | The qualitative work including : research the phase trajectory of the system 、 poincare map 、 power spectral and auto - correlation . the quantitative work including : calculation of ratio of period 、 calculation of fractional dimension and coefficient of lyapunov , especially ratio of period and the maximum lyapunov exponent . the results show that chaos occurs in the movement of system
定性的研究工作有：研究系统运动的相轨图、庞加莱映射图、功率谱图和自相关函数图；定量方面的研究工作有：周期比的计算、分维数的计算和lyapunov指数的计算，并着重进行了周期比和最大lyapunov指数的计算。 |
