| 1. | Application of perturbation methods in bifurcation instability problem
扰动法在结构分枝失稳分析中的应用 |
| 2. | Additive drag perturbation method for measuring active drag in swimming
测量游泳动态阻力的附加阻力微扰动法 |
| 3. | And then a new scheme , named chaotic sequence parameter perturbation method , was proposed . computer simulation shows that the new scheme can avoid the three disadvantages mentioned above
然后，本文提出一种新的dc / dc变换器控制策略? ?混沌序列参数扰动法，仿真结果表明该方法可以完全克服上述三个方面的不足。 |
| 4. | The paper researches on the control of chaos or hyperchaos via the method of the tune - delayed feedback control ( dfc ) , the proportional periodic pulse perturbation to the system variables ( pp - sv ) and limiting amplitude
本文主要对时间延迟反馈法( dfc ) 、正比于系统变量的周期脉冲扰动法( pp - sv )及限幅法这三种控制混沌和超混沌系统的方法展开了研究工作。 |
| 5. | Abstract : the observational fields in planet boundary layer and the modelerror are modified here in variational assimilation . the gradients of the cost function with respect to control variables are calculated in the way of perturbation
文摘:文中用变分方法修正边界层资料及模误差，目标函数相对于控制变量的梯度用扰动法计算，对利用小扰动求取梯度的方法进行了理论推导和试验分析。 |
| 6. | It is also introduced the task and composition of the system . secondly , in order to studying the dynamic characters of the bomb , the vertical and side direction perturbation equations of the bomb are analyzed . moreover , the transfer functions of the bomb are identified
第二，为了研究弹的动态特性，利用小扰动法将微分方程线性化，得到弹体纵向、侧向扰动方程组，用系数冻结法推导出简易制导炸弹的传递函数。 |
| 7. | The tactical missile seeker handover accuracy from midcourse to terminal guidance is researched . the small perturbation method is proposed to analyse error sensitivity of the seeker presetting parameters from error sources . firstly , the terminal guidance seeker presetting parameters are computed , based on the equations of a surface - to - air missile movement and a target movement . then the seeker presetting unaccuracy due to the command guidance radar measurement errors is also computed . it can be seen that the seeker presetting errors increase rapidly when the missile is close to the target , which leads to an important conclusion that the late seeker handover from midcourse to teminal guidance should be avoided
研究复合制导的战术导弹中末制导交班的导引头预定精度问题.提出用小扰动法分析导引头预定参数对误差源的误差敏感性关系.以中远程防空导弹为例，结合导弹运动方程组和目标运动模型，计算了中末制导交班的导引头预定参数，并计算了在制导站雷达测量误差下的末制导导引头预定参数的计算精度.可知，导引头定位参数的计算误差随着弹目距离的接近而显著增大，得到中末制导交班不能太晚的重要结论 |
| 8. | Abstract : the tactical missile seeker handover accuracy from midcourse to terminal guidance is researched . the small perturbation method is proposed to analyse error sensitivity of the seeker presetting parameters from error sources . firstly , the terminal guidance seeker presetting parameters are computed , based on the equations of a surface - to - air missile movement and a target movement . then the seeker presetting unaccuracy due to the command guidance radar measurement errors is also computed . it can be seen that the seeker presetting errors increase rapidly when the missile is close to the target , which leads to an important conclusion that the late seeker handover from midcourse to teminal guidance should be avoided
文摘:研究复合制导的战术导弹中末制导交班的导引头预定精度问题.提出用小扰动法分析导引头预定参数对误差源的误差敏感性关系.以中远程防空导弹为例，结合导弹运动方程组和目标运动模型，计算了中末制导交班的导引头预定参数，并计算了在制导站雷达测量误差下的末制导导引头预定参数的计算精度.可知，导引头定位参数的计算误差随着弹目距离的接近而显著增大，得到中末制导交班不能太晚的重要结论 |
| 9. | The method of change partial differential equation into ordinary differential equation is classified , the bifurcation and chaos in nonlinear schrodinger system is detected and the effectiveness of controlling chaos of buckling beam with parametric perturbation method is studied in details . chapter 7 is the summary and conclusion of the dissertation
第六章总结归纳了将非线性偏微分方程转化为常微分方程的变换法，研究了一维无界区域上非线性薛定谔方程的分岔和混沌性质，解析地研究了用参数周期扰动法控制屈曲梁的混沌运动的效果。 |
| 10. | As an application of succeeding , a numerical example of max - cut is given . 3 . several semidefinite relaxation detection strategies of the cdma maximum likelihood multiuser detection are investigated . rounding , coordinate descent , cutting plane and branch and bound based on quadratic programming algorithm are presented to get the suboptirnal solution
本文绐出了基于半定规划模型寻求多用户检测问题次优解的几种重要方法，包括随机扰动法、坐标下降法、半定规划的割平面法和二次规划的分枝定界法等 |
