Furthermore , there are some difficulties not only in the experiment research but also in the computer analysis , especially for the dynamic non - linear analysis , in order to improve the seismic design , the research in this field should be lucubrating 平扭耦联是一个空间问题,不便简化为平面问题处理,无论是试验研究还是计算分析,尤其是非弹性动力分析,都有很大的难度,研究工作还不是很深入,难以为结构设计提供可靠的依据。
From the results of linear analysis , it can be found that most of the people ' s heart beat rate centralize at 70 - 80 times / min . it ' s power spectrum is a continuous spectrum with a pinnacle , this shows that the heart beat rate signal obeys certain dynamical law 文中对15例心率信号进行了统计分析和简单的时频域分析,发现大部分人的平均心率集中在70 - 80次分,其功率若是一有尖峰的连续谱,说明心率信号不是简单的噪声,它服从一定的动力学规律。
Starting from two well - accepted assumptions in theory of thin - walled beams , a general theory for linear analysis of curved beams with any open sections is established in this paper by using the principle of virtual work . the equations of equilibrium and natural boundary conditions are given 文章首先从薄壁构件理论的两个基本假定出发,利用虚功原理,建立起一套精确的、可以应用于任意开口薄壁截面圆弧曲梁的线性理论,给出相应的平衡方程和边界条件。
My dissertation constructs three industrial models based on cash flow , including chemical industry , engine industry and real estate . by analyzing the difference of nineteen ratios based on cash between financial crisis companies and not financial crisis companies , i deduce three fisher linear analysis models and canonical models ( 2 )在房地产行业所建立的预警模型对样本进行判定,在财务危机发生之前的第1年模型误判率为3 . 3 ,第2年误判率为10 。
After a simulated sample is given , we compute on this sample coupling analysis and steady non - linear analysis . by contrast with the experimental outcome of short circuit , we make certain that steady non - linear analysis should be used to analyze a true model . and then , we confirm the external conditions of finite element heat analysis after analyzing the cooling ways of multiple magnetic circuit transformers 2 、论述了有限元分析的电磁场和温度场的理论基础;制造出模拟样机,分别用耦合场分析法和稳态非线性分析法对其进行计算,计算结果与其短路实验结果进行对比,验证了稳态非线性分析法计算结果的可信性;分析多磁路变压器的冷却方式,确定有限元热分析的外部条件。