| 1. | The application of a pressure difference across an injector does not cause an immediate velocity response of the liquid propellant .
经过喷注器的压降发生变化时并不马上引起液体推进剂速度变化。 |
| 2. | Then , a semi - analytical solution for the velocity response of the pile subjected to a semi - sine wave exciting force was derived by using invert fourier transform
利用付立叶逆变换，给出了半正弦脉冲激励下桩顶速度时域响应半解析解。 |
| 3. | Compared with traditional pid , temperature control system regulated by fuzzy controller is better than traditional control system in both the velocity response and credibility
通过与传统pid控制系统的试验比较，采用模糊控制器的温度控制系统，无论是在响应速度方面，还是在鲁棒性力而，均优于传统的控制系统。 |
| 4. | The state is markov process in appropriate expanded space and the accurate stationary solution , which is the probability density function of velocity response , can be obtained by solving its corresponding fpk equation
在适当扩大了的空间中，其状态是马尔可夫的，通过求解对应的fpk方程可得到精确稳态解，即速度响应的概率密度函数。 |
| 5. | With the consideration of the vertical wave effect of soil and soil - pile interaction , an approximate analytical solution to vertical vibration of pile system with variable impedance in visco - elastic layered soil is developed . a simplified and practical mathematical model for interaction between soil layers is proposed , and its applicability is theoretically investigated . based on this model and by using laplace transforms and the transmit property of impedance function , the analytical expression of the impedance function and solutions of the displacement and velocity response function in frequency domain and in time domain at the pile head are derived
4 、从三维轴对称土模型出发，对考虑桩土耦合作用、土层层间联系以及桩周土竖向应力梯度变化条件下的成层粘弹性土中完整桩及变阻抗桩系统纵向振动问题进行了研究，提出了成层土中变阻抗桩系统纵向振动问题的近似解析解法和桩周土层层间相互作用的简化而实用的数学模型，并利用拉氏变换和阻抗函数的传递性，获得了成层土中任意段变阻抗桩桩顶阻抗函数的解析表达式，以及桩顶速度导纳和时域速度响应解析解和半解析解。 |
| 6. | Under these assumptions , three kinds of excitations , namely , harmonic force with frequency equal to the structural fundamental frequency , harmonic force with frequency equal to half of the structural fundamental frequency and pulse force are inputted to the undamaged and damaged structures . then under the same excitation , the undamaged structural displacement responses , velocity responses , acceleration responses , jerk responses and responses of integrated displacement are compared with that of the damaged ones
在此假定基础上,分别将激励频率等于结构基频的简谐形激励、激励频率等于结构基频之半的简谐形激励和锤击激励输入结构,而后比较了损伤前后结构在相同激励下的位移响应、速度响应、加速度响应、加加速度响应和位移积分响应。 |
| 7. | With laplace transforms , the question can be solved in laplace domain . with the aid of impedance transmit functions , an analytical solution for the impedance function in laplace domain is yielded , so is the corresponding analytical solution for the impedance function in frequency domain , semi - analytical solution of velocity response in time - domain subjected to a semi - sine exciting force and mobility at the level of the pile head
利用拉普拉斯变换，将定解问题转化到拉普拉斯域内求解，结合阻抗函数的传递性，得到了拉普拉斯域内的桩顶阻抗函数解析解，进而得到了频域内的桩顶阻抗函数解析解、半正弦脉冲激振力作用下的速度时域响应半解析解和速度导纳。 |
| 8. | B ) relative velocity response spectrum ( sv ) and relative displacement response spectrum ( sd ) : the variation of velocity spectrum with depth is similar to that of acceleration spectrum . but the variation of displacement spectrum with depth is a little different to that of acceleration and velocity spectrum . that is , in strong earthquake , the variation of displacement spectrum and normalized spectrum in different depth is very small
( 2 )速度反应谱( s 、 )和位移反应谱( sd )沿深度变化的规律速度反应谱沿深度变化的特点与加速度反应谱基本相似;位移反应谱沿深度变化的特点与加速度和速度反应谱有较小差别，即强震时位移反应谱和标准位移反应谱沿深度的变化很小。 |
| 9. | As follows are the main contents of this paper : firstly , a matlab program has been worked out according to the response model of integrate and defective pile in time zone ; secondly , the most important factor that affects the curve of velocity is obtained through analyzing the curve of velocity response
主要研究内容如下：首先，针对成层土中完整桩和缺陷桩的时域响应模型编制了matlab程序；其次，通过对成层土中桩的时域速度响应曲线的分析，得到了影响速度响应曲线的主要因素。 |
| 10. | The main original work includes : 1 . the interaction between an integral pile and a uniform visco - elastic soil layer with viscous damping or hysteretic damping is theoretically studied , and the pile response to a harmonic load is obtained in a closed form and used to define complex stiffness at the pile head . semi - analytical solution of the velocity response in time domain subjected to a semi - sine wave exciting force is also given
主要工作包括： 1 、在考虑桩周土三维波动条件下，对滞回阻尼、粘性阻尼单层均质土中桩土纵向耦合振动问题进行了解析研究，分别得到桩顶位移、速度频域响应以及复刚度的严格解析表达，以及半正弦脉冲激振力作用下桩顶时域响应半解析解。 |
