ID	原文	译文
4713	随着误差进一步增大，系统保密容量渐渐无法达到预设目标，甚至可能降至 0。	As the synchronization error increases, the secrecy capacityof the system gradually fails to reach the preset target, and may even drop to zero.
4714	基于非完美信道状态信息，针对系统发射功率受限和用户速率需求约束下的系统和速率最大化问题，结合多输入多输出（MIMO）和非正交多址接入（NOMA）技术设计预编码和接收机。	In order to solve the problem of maximizing the sum rate under the constraints of transmission power limita-tion and users' rates requirements, precoder and receiver were devised by combining multiple-input multiple-output(MIMO) and non-orthogonal multiple access (NOMA) based on imperfect channel state information (CSI).
4715	限定强用户的每条数据流都需要解码相应的弱用户信号以利用串行干扰技术消除弱用户信号的干扰，利用半正定规划和一阶泰勒展开将所形成的非凸优化问题转化为 D.C.问题，并采用罚函数解决预编码秩为 1 的限制。	To take ad-vantage of successive interference cancellation (SIC) techniques to eliminate interference from weak user's signal, each data stream of the strong user needed to decode the corresponding weak user's signal. Since the problem formed wasnon-convex, it was converted into the problem with the difference of two convex functions (D.C.) by using semi-positive definite programming and first-order Taylor expansion, and a penalty function was used to solve the constraint of the rank of the precoding covariance matrix.
4716	仿真结果表明，相比于正交多址接入技术，所提出的 D.C.算法可以提高系统和速率。	The simulation results show that compared with the orthogonal multiple access tech-nology, the proposed D.C. algorithm can improve system sum rate.
4717	针对目前基于区块链的溯源算法主要通过同态加密及零知识证明进行隐私保护，使溯源信息难于实现动态共享这一问题，提出基于属性加密的区块链数据溯源算法。	To solve the problem that the blockchain-based traceability algorithm mainly used homomorphic encryptionand zero-knowledge proof for privacy protection, making it difficult to achieve dynamic sharing of traceability informa-tion, a blockchain data traceability algorithm based on attribute encryption was proposed.
4718	为实现交易隐私的动态保护，基于 Waters 所提CP-ABE 方案设计适用于区块链的策略更新算法，完成交易隐私的动态保护。	In order to realize the dynamic protection of transaction privacy, the strategy update algorithm applicable to block chain was designed based on theCP-ABE scheme proposed by Waters to achieve dynamic protection of transaction privacy.
4719	为实现区块内容可见性的动态更新，基于策略更新算法设计区块结构，实现区块内容可见性的动态更新。	In order to realize the dynam-ic update of the visibility about block content, based on the strategy update algorithm, the block structure was designed to achieve the dynamic update about the content visibility of the block.
4720	通过安全性及实验仿真分析表明，所提算法可以在完成保护交易隐私的同时，实现溯源信息动态共享。	The security and experimental simulation analysis show that the proposed algorithm can realize the dynamic sharing of traceability information while completing the pro-tection transaction privacy.
4721	针对单源和多源网络编码污染问题，提出了 2 种网络编码同态签名方案。	To solve the problems of pollution attacks of single-source and multi-source network coding, two homomor-phic signature schemes for network coding were proposed.
4722	单源网络编码椭圆曲线同态签名在椭圆曲线上对消息的散列值进行签名，输出消息、散列值和散列值的签名，接收节点验证签名，该方案通过同态的椭圆曲线签名来抵御代内/间污染。	In homomorphic signature for single-source network, the message hash value was signed on the elliptic curve, then the message, hash value and the signature of hash value wereoutput, and the receiving node could verify the signature, the elliptic curve signature based on homomorphism could res-ist intra/inter-generation pollution attacks.