Under the cylindrical coordinate , the transit - time effect of the radial gap in the resonance cavity of rtto is studied by hydrodynamic theory . the equation describing the interaction between the electron beam and the high frequency field is obtained 在柱坐标系统中，我们用流体理论方法分析了rtto谐振腔间隙的渡越时间效应，得到了在有限渡越角情况下电子束与高频场相互作用的方程。
The simulation shows that the frequency - spectrum characteristic of the tro is related with its output results , so the frequency - spectrum diagnosis is an important work for the x - band tro research . the frequency synthesis technique is used for the frequency - spectrum diagnosis 五、根据理论和粒子模拟的结果设计实验方案，进行x波段渡越辐射振荡器热测实验。输出微波功率1 . sgw ，微波频率9 . 18ghz ，脉冲宽度26ns ，效率达31 % 。
Meanwhile by using numerical method , the beam ' s one - order current density , and the power exchange between the beam and the field are solved . curves are given to illustrate the relations among the above solved parameters and the gap ' s transit angle in different electron velocity and number density 然后通过数值求解得到了不同初始速度和电子数密度时径向间隙中一阶电流密度、高频电场、电子束与本征场的功率交换等随间隙直流渡越角的变化规律。
Y type and s type dual - path saw mass sensors have been tested and analysed in detail . their frequency domain characteristics and time domain characteristics have been tested under non - oscillatory mode . transmission characteristics of y type s type and " - " type saw mass sensors are derived by p matrix representation . primary delay signal triple reflection signal and quintuple reflection signal of these sensor devices have been analysed in detail 结果表明，在正常工作模式下， y型和s型双声路声表醚质量传感器件的三次渡越反射信号和五次渡越反射信号比“一”字型双声路声表醚质量传感器件的三次渡越反射信号和五次渡越反射信号分别小12db 、 16 . 67db和n _ . sdb ? 17 . 3db 。
Based on this arithmetic , the high frequency characteristics of five - cavity with open boundary is calculated by the code written in fortran language . then the transit effect of five modes of five - cavity with open boundary is also calculated using code mathcad and matlab . the results show that the working mode of five - cavity transit tube oscillator is 3 / 6 mode , and the analysis of the theory are in good agreement with the simulation results 根据从基于四腔渡越时间效应的自调制出发，经过一段飘移，然后再采用双间隙提取腔边耦合输出高功率微波的思路，采用粒子模拟方法优化设计出一种峰值功率为1 . 5gw ，频率为9 . 3ghz的六腔渡越辐射振荡器，并研究了它的一系列工作特性。
A x - band six - cavity tro is studied . with the voltage 760kv 6ka and the magnetic field 2 . 6t in the simulation , output power is about 1 . 5gw is obtained , and interaction efficiency is 31 % . a noveland high accurate numerical synthetic technique is presented for determining the high frequency characteristics of six - cavity with open boundary 对粒子模拟的输出微波功率的作出诊断，找到读取微波功率快速有效的方法：在电场和磁场同相的前提条件下，对时域波形进行傅立叶变换，微波功率频域的二倍频所对应的幅度即为微波x波段渡越辐射振荡器的理论和实验研究平均功率的大小。
The disturbance model can give the prediction for all the 95 shock events , while stoa model works for 89 events and ispm model for only 72 events . we arrive at 25 . 26 % percentage of all the 95 events with the relative time error less than 10 % , 50 . 53 % of all the events with the relative time error less than 20 % , 65 . 26 % of all the events with the relative time error less than 30 % , 31 . 58 % of all the events with the relative time error between 60 % ~ 80 % 实验表明，我们的模型在所有95个事件中，渡越时间相对误差小于10的事件数占总事件数的25 . 26 ；相对误差小于20的占总事件数的50 . 53 ；相对误差小于30的占总事件的65 . 26 ；相对误差在30 60的之间的事件数有30个，占总事件的31 . 58 ；有3个事件相对误差在60 80之间，没有哪个事件相对误差大于80 。
After that , the multifractal spectra dq - q are computed by fixed - mass method . the results show that in the studied scaling range different types of landscapes and profiles in different directions perform different fractal properties , that is , the d value and crossover length ^ decrease in turns with the landform type from high - moutain , mid - low mountain to basin , and the profile parallel to wear grooves often has lower d values ( < 1 . 5 ) than those perpendicular to wear grooves do ( 1 . 5 ) in the same section 提出以地貌分形特点和渡越长度为依据的地貌层次界定方案，研究指出了5km左右应为宏观临界点：不同构造地貌区、不同取向的剖线的多重分形谱值域范围宽窄表现出中低山区高山区盆地区，垂直构造地貌斜坡方向斜交方向平行方向的特点，表明了内外营力作用的不均匀性和方向性。
Due to restriction with the array aperture transition time , traditional phased array radar works under relative narrow signal bandwidth , so this restricts the application of phased array radar in the field where high performance is demanded . however , optically controlled phased array radar ( ocpar ) adopts the photoelectron technology , counteracts the aperture transition time via the method of optical true time delay ( ottd ) , so it can realize wide instantaneous bandwidth and squint - free operation ; meanwhile , it can realize the miniaturization of phased array radar and has super anti - electromagnetism interference capability 而光控相控阵雷达采用光电子技术,通过光实时延迟的方法来抵消孔径渡越时间,可以实现相控阵雷达的宽带宽角扫描;同时也可以使得相控阵雷达小型化,并具有强的抗电磁干扰的能力;另外,由于光纤传输具有损耗低、频带宽等固有优点,采用光纤连接雷达天线和雷达控制中心,可以使两者的距离较采用同轴电缆有较大的提高,更有利于保护雷达控制中心。
