ID 原文 译文
47276 依据内容流行度和缓存空间，指定内容在传输路径的存储位置。 The on-path caching location was given by the popularity and the cache size.
47277 仿真实验表明，与经典算法相比，该策略有效提高了缓存命中率，同时降低了平均路由跳数比，改善了缓存系统的效率。 Simulation results show that,compared with the classical schemes, this scheme promotes the cache hit ratio and decreases the average hop ratio, thusenhancing the efficiency of the cache system.
47278 针对空时互质采样下频率和波达方向（DOA, direction-of-arrival）稀疏联合估计中存在的二维栅格失配问题，提出一种栅格失配目标下的频率和 DOA 联合估计方法。 A method of joint frequency and direction of arrival (DOA) estimation using spatial-temporal co-primesampling with off-grid sources was proposed to solve the problem of two-dimensional (2D) mismatches of signals.
47279 首先对入射信号做空时互质采样， Firstly,the received signal was sampled by spatio-temporal co-prime sampling technique to construct 2D sparse reconstructionmodel with the filled coarray.
47280 建立虚拟满阵下的二维稀疏恢复模型， Then the frequency mismatch term and angle mismatch term were incorporated into thereceived data model.
47281 然后在以上模型中引入频率栅格失配误差项和角度栅格失配误差项进行二维修正，并给出一种改进的贪婪算法，通过对谱泄露变量联合求解来得到二维栅格失配误差项， Based on the above modified model, an improved greedy algorithm was presented to obtain thefrequency mismatch and angle mismatch by estimating the spectrum leakage terms jointly.
47282 最终将栅格失配目标校正到精确位置上。 So the 2D off-grid sources canbe corrected to accurate positions.
47283 该方法不仅可以提高空频域上的自由度（DOF, degrees of freedom）， The method can increase the degrees of freedom (DOF) in the space-frequency domain.
47284 而且在降低运算量的同时改善了频率和 DOA 联合估计的精度。 Moreover, the method has reduced the amount of computation, and it can improve the frequency and DOA estimationaccuracy in the meantime.
47285 仿真结果验证了方法的正确性。 Simulation results demonstrate the correctness and effectiveness of the proposed approach.