ID 原文 译文
12584 通过该方法的计算表明，亲电子材质对等离子体中尘埃带电可以造成影响，且当亲电子效应足够强时，影响效果将不可忽视。 The calculation by this method shows that the electrophilic material can affect the dust charging in the plasma, which cannot be ignored when the electrophilic effect is strong enough.
12585 在强散射干扰源存在的条件下 ，线性调频连续波 (linear frequency modulated continuous wave，LFMCW) 雷达回波在距离维呈现回波信号频谱扩散现象，给雷达微弱目标检测带来严重的技术挑战。 In the presence of the strong scattering sources, the spectrum has spread throughout the frequencydomain of the return signal, resulting in the challenge of detecting weak target for the linear frequency modulatedcontinuous wave (LFWCW) radar system.
12586 基于对检测目标中心区域多个相邻雷达波束回波数据各分量之间的相关性分析 ，提出基于区域多帧联合处理的LFMCW 雷达强散射源环境下微弱目标特征增强技术，通过加权补偿，利用来自目标附近扫描区域的多帧数据进行多帧联合处理，增强微弱目标回波信号特征，提升微弱目标的检测能力。 Based on the relevance analysis among the multi-frame difference-frequencysignals derived from the neighboring region of target direction, the weak target feature enhancement technology based on the multi-frame processing jointly is proposed through weighting method of compensation in range dimension. Then, the multi-frame joint procession is carried out to promote the detecting capability for the weak target with return signal feature enhancement.
12587 通过某型异物检测雷达实测数据分析结果，验证了该方法能够有效处理强散射源存在条件下的微弱目标检测问题。 Finally, the analysis results of experimental data from a foreign matter detection radar shows that the clutter suppression can be effectively conducted by the proposed algorithm.
12588 基于同轴线馈电的并行时域有限差分 (finite-difference time-domain, FDTD) 方法，研究分析了双指数脉冲源激励的位于地面上的大型双锥椭圆笼形天线的辐射场，给出了天线的椭圆形笼半径、双锥半角、架高及圆心间距等几个关键参数对该天线辐射场的影响。 The radiation field of large biconical-ellipsoid cage antenna on ground and excited by a doubleexponential pulse is studied and analyzed based on parallel finite-difference time-domain (FDTD) method with coaxialfeed. The influence of several key parameters such as the cage radius, bicone half angle, the height of the antenna andthe length of the antenna etc on the radiated electric field of the antenna is presented.
12589 研究表明：椭圆形笼的半径从 3.0 m 增加到 4.5 m 时，对位于天线双锥中心正下方及其向天线外侧偏离的测点场的峰值和上升沿几乎没有影响；双锥半角的改变使测试区内测点场的峰值、上升沿和半高宽 (full width at half maximum, FWHM) 发生变化；天线架高越高，与地面距离相同的水平面上场的分布越均匀；两个笼与地面相交得到的两个圆的圆心间距越大，过双锥中轴线且与地面垂直的剖面上靠近椭圆形笼的测试区边缘的场更均匀；测试区场的 FWHM 随着激励源 FWHM 的增加非线性增加。 Numerical results show that thereis very little effect on the peak-value and rise-time of the radiated fields of testing points directly under the bicone centerand the points along sideward departure from those points as the radius of the cage increases from 3.0 m to 4.5 m; thepeak-value, rise-time and full width at half maximum (FWHM) of testing points may be affected by the bicone halfangle; the field distribution uniformity on the horizontal plane with the same distance from ground is better as the heightof the antenna increases; the field distribution uniformity of the edge region near the ellipsoid cage of the testing area onthe plane including the central axis and perpendicular to the ground is better, as the distance between the two centers ofthe two circles got by the connection of two cages and the ground increases; there's no linear increase for FWHM oftesting fields as the source FWHM increases.
12590 目前阵列雷达目标探测技术大多依赖传统的相控阵技术，但其所产生的波束只与角度有关。 Conventional radar with phased-array antenna can only generate angle-dependent beam patterns.
12591 而近年来频控阵（frequency diverse array, FDA）的提出，使得波束不仅与角度有关还与距离和时间有关。 While recent proposed frequency diverse array (FDA) can generate beam patterns associated with angle, range and time.
12592 基于 FDA 技术，通过最大化接收信号的信噪比（signal-to-noise ratio, SNR）作为优化目标，提出了最优发射信号的预编码和FDA 频偏的设计方法，从而把对其他无线设备的干扰降低到最小。 Basedon the technology of FDA, we propose an optimal precoder and frequency offsets for FDA to lower the interference of FDA radar to other radio systems by maximizing the received signal-noise-ratio.
12593 预编码的设计使得 FDA 的波束在目标处产生一个角度-距离维上的孤立点，而 FDA 的优化算法是基于一种变种的梯度下降法，通过回溯法线性搜索出最佳迭代步长。 The design of FDA precoder makes its beam pattern as an isolated point in angle-range domain, while the proposed optimization algorithm based on areconstructed gradient descent method, wherein the step size is obtained by backtracking line search method.