| ID | 原文 | 译文 |
| 5524 | 首先，提出一个本地导频辅助信道探测协议，解决了由于水声信道中传播时延较大引起的互易性受损问题，保证密钥随机性，增强对邻近窃听者的防御能力； | First, a local pilot assistance channel sounding protocol was proposed to solve the reciprocity impaired caused by thegreat propagation delay in the underwater acoustic channel, ensure high key randomness and enhance the defensesagainst nearby eavesdroppers. |
| 5525 | 其次，提出一个双层补偿聚合结合自适应保护间隔的量化方法，提升了密钥一致性且使密钥生成速率维持在较高水平。 | Secondly, double-layer compensation centralized combined with adaptive guard intervalquantization method was proposed to improve key agreement rate and key generation rate. |
| 5526 | 仿真结果显示，所提方案有效地克服了水声通信中互易性受损的问题，且在密钥一致性优于现有水声密钥生成方案的前提下保证了高密钥生成速率和较高的随机性。 | Simulation results show that the scheme effectively overcomes the problems of impaired reciprocity and ensures high key generation rate and highrandomness on the premise that the key agreement is superior to the existing schemes. |
| 5527 | 针对现有恶意 PDF 文档在检测方案存在特征顽健性差、易被逃避检测等问题，提出了一种基于混合特征的恶意 PDF 文档检测方法， | Aiming at the problem of poor robustness and easy to evade detection in the detection of malicious PDF doc-ument, a malicious PDF document detection method based on mixed features was proposed. |
| 5528 | 采用动静态混合分析技术从文档中提取出其常规信息、结构信息以及 API 调用信息，并基于 K-means 算法设计了特征提取方法，聚合出表征文档安全性的核心混合特征，从而提高了特征的顽健性。 | It adopted dynamic and stat-ic analysis technology to extract the regular information, structure information and API calling information from thedocument, and then a feature extraction method based on K-means clustering algorithm was designed to filter and selectthe key mixed features that characterize the document security. Ultimately, it improved the robustness of features. |
| 5529 | 在此基础上，利用随机森林算法构建分类器并设计实验，对所提方案的检测性能以及抵抗模拟攻击的能力进行了探讨。 | On this basis, it used random forest algorithm to construct classifier and perform experiment to discuss the detection performanceof the scheme and its ability to resist mimicry attacks. |
| 5530 | 稀疏码多址接入（SCMA）技术是新一代 5G 通信技术的多址技术方案之一。 | Sparse code multiple access (SCMA) technology is one of the multiple access technology schemes for the newgeneration of 5G. |
| 5531 | 针对 5G 海量用户传输需求问题，提出了用户传输信息时采用 logistic 混沌序列代替原始系统中的随机序列来选择码本。 | In order to solve the transmission requirement of massive users, the logistic chaos sequence was pro-posed instead of the random sequence in the original system to select the codeword. |
| 5532 | 在编码端利用基于网格编码调制（TCM）的子集分割法设计星座图，结合映射矩阵生成码本，用户信息经信道传输后在解码端通过消息传递算法（MPA）进行解码。 | The constellation method based ontrellis coded modulation (TCM) subset segmentation with the mapping matrix was used to generate codebook in the en-coder, and decoded through message passing algorithm (MPA) detection method. |
| 5533 | 仿真结果表明，利用混沌的伪随机序列选择码字，系统传输的误码率（BER）较低，且在高过载率情况下系统性能表现良好 | The simulation results show that the biterror rate (BER) is low when the system uses the pseudo-random sequence of chaos to select the codeword, and the sys-tem also performs well under the condition of high overload rate. |