ID	原文	译文
7474	复杂电磁环境和武器系统隐蔽攻防的趋势下,目标回波常淹没在噪声干扰之中而难以被准确检测。	Complex electromagnetic environment and concealed weapon system under the trend of the offensive and defensive, target echo is often buried in noise and difficult to be accurately detection.
7475	被动雷达因能有效应对电子对抗、隐身技术以及反辐射导弹等威胁而引起广泛关注,但被动探测方式制约于辐射源的特性,采用传统长时间积累方法有时难以有效提高目标检测性能。	For passive radar can effectively cope with electronic countermeasures, stealth technology and anti-radiation missile threat caused wide public concern, but passive detection means restriction on the characteristics of the radiation source, using traditional and long time accumulation methods are sometimes difficult to improve the target detection performance.
7476	针对上述问题,本文提出一种被动雷达的弱目标探测方法,该方法以单脉冲为处理对象,利用概率统计方法,对观测时间内的每一条脉冲检测结果进行统计,并通过概率直方图中的目标检测频度分布来检测目标。	According to the above problem, this paper puts forward a kind of passive radar weak target detection method, the method based on single pulse processing object, using the method of probability and statistics, within the observation time on each pulse for statistical test results, and through the target detection probability histogram to detect the target frequency distribution.
7477	实验结果表明该方法能有效检测弱目标,非常适合在工程实践性中应用。	The experimental results show that this method can effectively detect the weak target, very suitable for application in engineering practice.
7478	针对稀疏恢复空时自适应处理(space-time adaptive processing,STAP)存在网格失配时,造成稀疏恢复STAP的性能下降这一问题,提出一种基于局部搜索正交匹配追踪算法。	For sparse recovery space-time adaptive processing (space - time the adaptive processing, STAP) presence of grid mismatch, a decline in sparse resume the performance of STAP problem, put forward a kind of orthogonal matching pursuit algorithm based on local search.
7479	该算法首先从全局STAP完备字典中选择与杂波相匹配的全局网格点;	The algorithm firstly from the global choose match the clutter of STAP complete dictionary of global grid point;
7480	然后以选出的全局网格点为中心,以全局完备STAP字典的空时频率间隔为区域,构建局部STAP字典,并从中选择与杂波最匹配的局部网格点;	The global grid point as the center, and then to choose to complete global STAP dictionary of space-time frequency interval for the area, build local STAP dictionary, and select and clutter the most matching local grid point;
7481	最后得到杂波的角度-多普勒像和修正的STAP字典。	Finally get the Angle of clutter - doppler like and correction of STAP dictionary.
7482	仿真结果表明,所提的算法能够选择与真实杂波脊相匹配的网格点,从而提高了稀疏恢复STAP技术的性能。	The simulation results show that the proposed algorithm can choose to match the real clutter ridge of grid points, so as to improve the performance of the sparse recovery STAP technique.
7483	答案选择的主要任务是对问答系统中问题的候选答案排序。	The answer choice is the main task of the candidate answers to the questions in the question answering system.