| 1. | The resulting ultrasonic sound wave can then be directed out in a tightly controlled beam
由此超声音波可以用严格控制声音的方向。 |
| 2. | A time magazine display at the convention will feature speeches of past republican presidents in tightly controlled beams of hypersonic sound ( hss )
时代杂志展示了大会将用这种超音速声音（ hss ）的紧密的控制的柱来放映前共和党总统的演讲。 |
| 3. | All specimens were composed of one control beam ( without main bars corrosion ) and eight pieces of corroded main bars beams ( with corrosion rate from 4 % to 12 % )
全部试件包括1根对比梁(主筋未锈蚀)和8根加速锈蚀梁(主筋的锈蚀率范围为4 % - 12 % ) 。 |
| 4. | We give a brief theoretic analysis of using delayed self - controlling feedback to control beam halo . s ( the length of one period of focusing channel ) is selected as the delay parameter of the controller and the maximal lyapunov exponent is calculated
经分析，确定了延迟反馈控制器的延迟参数为s (一个聚焦磁场通道周期) ；而后，计算了系统的最大李雅普诺夫指数。 |
| 5. | This method , not only can control beam halo - chaos well as wavelet had done , but also is easy to work out because of the linearity and the simpleness of its controller . considering the advantage in technology realizing and cost saving , this method is a good reference to application
由此可见，该法可达到小波函数法相同的控制效果，而控制器采用线性控制律，仅有一个调节参数，形式简单，施加的反馈较小，因而应用前景较好。 |
| 6. | The control of beam halo - chaos becomes a critical problem in the development of high intensity accelerator . efforts to remove the halo by collimation have been largely unsuccessful since the halos almost always regenerate . the mechanisms of halos are complex , such as nonlinear resonances and chaotic behavior etc . considering this , professor fang jin - qing who works in china institute of atomic energy pointed out that the theory of chaos control can be used to control beam halos . he presented the method to control halos by using nonlinear functions , which means nonlinear function g is added to the right of ion radial self - edlctric force equation and some nonlinear function are selected to control beam halos in simulations . in paper [ 69 ] , controllerg = - 0 . 15sin ( rmax - am ) 2 was used and the halo intensity was decreased to 0 . 1078 , the halos are removed partly
束晕?混沌的控制是新一代强流加速器研制的关键问题，随着强流离子束应用前景的日趋广阔而日益成为研究的热点。传统机械限束器因无法解决束晕的再生而收效甚微，因为束晕的形成有着其内在动力学机制?非线性共振以及混沌等。基于此，中国原子能科学院研究员方锦清将混沌控制的理论和方法开创性的运用于束晕?混沌的控制上，提出了控制束晕?混沌的非线性控制策略，即在粒子径向所受束自生场力方程的右边加上非线性控制函数g ：并选取一些非线性函数如等进行了控制的模拟研究，将束晕强度控制在0 . 1078左右，取得了初步的控制效果。 |
| 7. | In this paper , we give a summary of controlling chaos and a review of the mechanism of beam halo and its nonlinear control . then delayed self - controlling feedback method is presented to control beam halo - chaos . this method , not only can control beam halo - chaos well , but also is easy to work out because of the linearity and the simpleness of its controller . considering the advantage in technology realizing and cost saving , this method is recommended to the development of high intensity accelerator
本文在综述混沌控制和回顾束晕?混沌形成机制及其非线性控制的基础上，提出了应用延迟反馈控制束晕?混沌的方法。该法不仅控制效果显著，而且由于采用线性控制律，控制器形式简单，施加的反馈较小，因此该法非常有利于工程技术实现和降低控制代价，可为实用强流加速器的研制提供有价值的参考。 |
| 8. | It can be seen from the results that the control beam had good plastic property in the static failure experiment after two million fatigue loading circles . all specimens with corroded main bars were failure under the fatigue loads within one million fatigue circles . fatigue lifespan of reinforced concrete beam was sharply shortened after main bars corroded in it and the beam was destroyed bristly without any prediction
试验结果表明,振动测试不能够对锈蚀钢筋混凝土梁的疲劳破坏做出可靠的预测;对比梁在经过200万次疲劳循环加载后的静力试验中仍表现出良好的延性破坏特征;锈蚀梁在100万次疲劳循环内均因主筋疲劳断裂而破坏;主筋锈蚀使得梁的疲劳寿命急剧缩短;梁发生脆性破坏而没有征兆。 |
