ID 原文 译文
24585 在受大气湍流影响的自由空间光通信中的仿真表明，iSABM-SCC性能显著优于标准 SCC和RS码。 The simulation results for free-space optical communications show that the proposed iSABM-SCC scheme achieves higher performance gains over standard SCC (S-SCC) and RS code in turbulence channels.
24586 以强湍流信道为例，码率为 0.75 的 iSABM-SCC 在 4-PAM 调制下较标准 SCC 产生的性能增益可达 4.37 dB，在8-PAM调制下较RS码产生的性能增益可达11.06 dB。 For instance, iSABM-SCC with code rate of 0.75 has been shown to yield up to 4.37 dB performance gain when compared to S-SCC for 4-PAM and up to 11.06 dB performance gain when compared to RS code for 8-PAM in a strong turbulence channel.
24587 平衡图划分是改善并行图计算性能的关键。一个良好的划分算法应保证划分后的子图在负载均衡的前提下，减少子图之间的交互边(切割边)规模，从而减少网络通信。 It is the key to improving the performance of graph calculation by improving the efficiency of the graph partitioning algorithm and reducing the communication edge scale between the subgraphs. Due to the limited memory capacity of single computing node, it is difficult to meet the partitioning requirements of large-scale graphs in terms of partitioning efficiency and partitioning quality.
24588 对此，本文设计一种基于层次亲和聚类的分布式大图划分算法(DisHAP)。 In this paper, a distributed graph partitioning algorithm based on hierarchical affinity clustering for massive scale graphs is designed, called DisHAP.
24589 该算法采用亲和聚类的思想，将图初始划分为规模相等的 k 个子图； It uses the Boruvka minimum spanning tree algorithm tobalance cluster the graph under the constraint condition of the input graph according to the vertex similarity, and partitions the graph into k subgraph (partitions) with equal size.
24590 最后将 DisHAP应用在 MapReduce框架中，使用多种真实及理论图数据，与现有的大图划分算法做比较分析。 Finally, we use various actual and theoretical graph data to compare with existing graph partitioning algorithms to verify the effectiveness of the DisHAP algorithm.
24591 以 Twitter图为例，划分 2，4，8，16，32个子区，相较于现有的大图划分算法（LDG，BLP，Spinner，Fennel，ParMetis及 PSA-MIR算法），割边率减少 1.7%～30.2%，说明了该算法的优越性。 Taking the graph Twitter as an example, it is partitioned into 2, 4, 8, 16, 32 partitions. Compared to LDG, BLP, Spinner, Fennel, ParMetis and PSA-MIR algorithms, the fraction of edges cut is reduced by 30.2%, 29.4%, 10.2%, 7.8%, 1.7%, and 3.3% respectively.
24592 无线光通信系统中的指向误差对光功率的几何衰减产生影响，导致系统接收光功率的下降，影响系统性能。 Pointing error in wireless optical communication system has an impact on the geometric attenuation of the received optical power, resulting in a decrease in the received optical power of the system and affecting the performance of the system.
24593 为了精确分析指向误差对无线光通信系统性能的影响，本文基于高斯光束光强分布推导了圆形孔径下无线光通信系统接收光功率几何衰减模型的精确解析解，仿真了不同参数条件下指向误差对系统几何衰减的影响，验证了解析解的准确性，并与现有模型进行了比较分析。 In order to accurately analyze the effect of pointing error on the performance of wireless optical communication system, based on the intensity distribution of Gaussian beam, the accurate analytical solution of the geometric attenuation model of received optical power in wireless optical communication system with circular aperture is derived. The influence of pointing error on the geometric attenuation of the system under different parameters is simulated, and the accuracy of the analytical solution is verified and compared with the existing model.
24594 结果表明，采用现有近似模型计算几何衰减存在的误差不能忽略，因此在圆形孔径下进行模型推导更符合实际情况。 The results show that there are errors in using the existing approximate model to calculate the geometric attenuation, and the existing errors cannot be ignored, therefore the model derivation under the circular aperture is more in line with the actual situation.