ID 原文 译文
16635 首先，该算法以队列稳定和前传链路容量为约束，联合优化用户关联、功率分配和资源块分配，并建立网络能效和用户公平的联合优化模型； First, the algorithm takes queue stability and forward link capacityas constraints, jointly optimizes user association, power allocation and resource block allocation, and itestablishes a joint optimization model of network energy efficiency and user fairness.
16636 其次，由于系统的状态空间和动作空间都是高维且具有连续性，研究问题为连续域的NP-hard问题，进而引入置信域策略优化(TRPO)算法，高效地解决连续域问题； Secondly, because thestate space and action space of the system are both high-dimensional and continuity, the research problem isthe NP-hard problem of the continuous domain, and then Trust Region Policy Optimization (TRPO) algorithmis introduced to solve efficiently the continuous domain issue.
16637 最后，针对TRPO算法的标准解法产生的计算量较为庞大，采用近端策略优化(PPO)算法进行优化求解，PPO算法既保证了TRPO算法的可靠性，又有效地降低TRPO的计算复杂度。 Finally, the amount of calculations generated bythe standard solution for the TRPO algorithm is too large, and Proximal Policy Optimization (PPO) algorithmis used to optimize the solution. The PPO algorithm not only ensures the reliability of the TRPO algorithm,but also reduces effectively the TRPO calculation complexity.
16638 仿真结果表明，该文所提算法在保证用户公平性约束下，进一步提高了网络能效性能。 Simulation results show that the algorithmproposed in this paper improves further the energy efficiency performance of the network under the constraintof ensuring user fairness.
16639 重复累积(RA)码是一种特殊结构的低密度奇偶校验(LDPC)码，不仅具有LDPC码的优点，还能实现差分编码。 Repeat Accumulate (RA) code is a special kind of Low Density Parity Check (LDPC) code, whichnot only has the advantages of LDPC code, but also realizes differential encoding.
16640 针对LDPC编码协作系统编码复杂度高、时延长的问题，该文引入准循环RA(QC-RA)码， To solve the problems ofhigh encoding complexity and long encoding delay of LDPC-coded cooperative system, Quasi-Cyclic RA (QC-RA) code is introduced.
16641 推导出信源节点和中继节点采用的QC-RA码对应的联合校验矩阵，基于公差构造方法设计该联合校验矩阵，并证明该方法设计的联合校验矩阵不存在围长为girth-4, girth-6的短环。 Firstly, a joint parity check matrix corresponding to the QC-RA codes adopted by thesources and relays is deduced; Secondly, the joint check matrix is designed based on the Common DifferenceConstruction (CDC) method, and it is proved that the joint check matrix designed by the CDC method doesnot have short cycles with girth-4 or girth-6.
16642 理论分析和仿真结果表明，同等条件下该系统比相应点对点系统具有更优异的误码率性能。 Theoretical analysis and simulation results show that the system achieves better Bit Error Rate (BER) performance than the corresponding point-to-point system under the same conditions.
16643 仿真结果同时表明，与采用一般构造QC-RA码或基于Z型构造QC-RA码相比，采用基于公差构造的联合设计QC-RA码的多信源多中继协作均可获得更高的编码增益。 The simulation results also demonstrate that the multi-source multi-relay coded cooperationwith CDC constructed QC-RA code can obtain higher coding gain than that with generally constructed QC-RAcode or Z-type constructed QC-RA code.
16644 为了提高肺结节恶性度分级的计算精度及可解释性，该文提出一种基于CT征象量化分析的肺结节恶性度分级方法。 In order to improve the accuracy and interpretability of the grading of malignant nodules in the lung,a method is proposed to achieve grading automatically for lung nodules by using (Computed Tomography, CT)signs.