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- By adapting Davenport spectrum for horizontally fluctuating wind, wind velocity time history at the opening was simulated by using trigonometric series. 采用Davenport水平脉动风速谱;利用三角级数对开孔处的来流风速时程进行模拟.
- velocity time history 速度时程
- The time history of pulse wind velocity and wind pressure on the structure has been simulation based on Davenport wind speed power spectrum and Shinozuka theory. 方法采用Daven port风速谱并根据Shinozuka理论;应用简谐波叠加法分别模拟了脉动风速、脉动风压和脉动风荷载时程曲线.
- Each time history repeats itself, the price goes up. 答案：历史每重演一次，代价就增加（一分）。
- China is a eastern courtry with a long time history. 中国是一个有着悠久历史的东方国家。
- In addition, a series of reasonable time histories of helicopter velocity, angular velocity and flight attitude were shown during the given Dolphin maneuver flight. 最后以黑鹰直升机为例计算了鱼跃越障机动飞行时驾驶员操纵输入及直升机速度、角速度和飞行姿态的变化规律。
- The coronary peak velocity(CPV)and the velocity time integral(VTI)in left anterior descending arterial flow were measured during dipyridamole induced hyperemia under control conditions and each grade of acute AR. 记录各返流程度的舒张期血流速度峰值 ( CPV)、加速时间 ( AT)、减速时间 ( DT)和全心动周期的速度时间积分 ( VTI)及动脉舒张压 ( DBP)。 然后在各种状态下经股静脉匀速推注潘生丁 ( 2 .;0 mg/kg);2分钟推完;记录各组每分钟冠脉血流的 CPV和 VTI;
- The peak A velocity(VA), velocity time integral of A-wave(A-VTI), atrial ejection force(AEF) and peak atrial tissue velocity(Va) decreased in day 1 after cardioversion, but gradually recovered with time. 房颤患者除颤后 2 4小时VA、A -VTI、AEF和Va明显低于正常 ,随时间推移逐渐增高 ,至除颤后 7天时基本恢复至正常水平。
- Start-up time can be saved by controlling the optimum velocity time of feeding, optimum temperature-rise time of low-pressure converting furnace and adding self-heating balance design. 通过寻找化工投料的最佳速度、时间及低变炉最佳升温时间,并加设合成塔催化剂的自热均衡设计等措施,可以节约开车时间,减少经济损失。
- In the example of Nimu Bridge, a FEM model of 3D beams is established by beam grid method, and mode analysis and time history analysis have been done. 以尼木大桥为例,采用梁格法建立了空间梁单元有限元模型,进行了模态分析和动力时程分析。
- A time history analysis method for calculating the dynamic stability safety factor of high rock slope under excavation blasting is proposed. 提出一种计算岩质高边坡爆破开挖情况下动力稳定性安全系数的时程分析方法。
- This chapter delves into thought-form and belief systems utilized to construct the current DNA that humans exist within in present time history. 该章节深入探究了用于构建人类在历史此刻所存在其中DNA的思想形态与信仰系统。
- For concrete material,a normal expansion theory was proposed by which some deceleration about time history of the projectile can be analytically given. 通过分析,针对混凝土材料,提出了可给出弹体减速度时间历程解析解的法向膨胀理论。
- Lastly, ANSYS was employed to complete the time history analysis.The results of the time history analysis had cormfirmed the pushover analysis. 最后，利用有限元软件ANSYS对相同的半刚性连接钢框架进行动力时程分析，将分析结果与推覆分析结果进行比较。
- Result also shows that by simulating wide band velocity records we can get acceleration and displacement time histories, but high frequency part of acceleration time histories will have partial loss. 由宽频带速度记录也可得到加速度时程和位移时程,但对加速度时程高频成分会有一定的损失;
- To evaluate the nicety and reliability of POA method, the author compares the POA with inelastic time history analysis through case study. 作者通过算例分析，对推倒分析法与非线性时程分析法进行了比较，以评估推倒分析法的准确度及可靠性。
- Based on non-proportional damping theory,complex model time history analysis of viscoelastic damper structure and evaluation method for seismic reducing effect were established. 基于非比例阻尼理论,建立了粘弹性阻尼器结构复模态时程分析及减震效果的评价方法。
- Seismic responses of the hetero-column frame with bottom rectangle columns are analyzed by time history method and are compared with the normal hetero-column frame. 对底部矩形柱上部异形柱框架结构以及纯异形柱框架结构进行了时程地震反应分析。
- Based on modal analysis to piezoelectric smart laminated plates, a finite inverse algorithm of the time history about impact loads by piezoelectric modal respondence is presented. 摘要基于对智能层合板结构的模态分析，提出由结构的压电模态响应反演瞬态荷载时间历程的有限元方法。
- Fruit juices ferment if they are kept a long time. 果汁若是放置很久，就会发酵。
