ID 原文 译文
46356 针对格上基于身份的分级加密（HIBE, hierarchical identity-based encryption）体制中用户密钥提取算法复杂度过高和陷门尺寸膨胀率大的问题，提出一种新的 HIBE 方案。 Aiming at the high complexity in user’s private key extraction and large expansion ratio of trapdoor size in previous hierarchical identity-based encryption (HIBE) schemes, a new HIBE scheme was proposed.
46357 首先，利用隐式扩展法对 HIBE 方案中的原像采样算法优化，然后，结合 MP12 陷门派生算法提出一种高效的 HIBE 用户密钥提取算法， The implicit extension method to improve preimage sampling algorithm was used, and then combined the improved algorithm with MP12trapdoor delegation algorithm to construct an efficient HIBE user’s private key extraction algorithm.
46358 并基于该算法结合对偶 LWE 算法完成 HIBE 方案构造。 Finally, the new ex-traction algorithm and the Dual-LWE algorithm was integrated to complete the scheme.
46359 对比分析表明，所提方案的效率较同类方案在系统建立和用户密钥提取阶段均有提升，陷门尺寸与系统分级深度仅成线性增长关系，且优化后的原像采样算法一定程度上可解决 MP12 陷门派生算法在陷门派生后高斯参数增长的问题。 Compared with the similar schemes, the efficiency of the proposed scheme was improved in system establishment and user’s private key extraction stage, the trapdoor size grows only linearly with the system hierarchical depth, and the improved preimage sample algorithm partly solves the Gaussian parameter increasing problem induced by MP12 trapdoor delegation.
46360 在标准模型下，方案安全性归约至判定性 LWE 问题的难解性，并包含严格的安全性证明。 The security of the proposed scheme strictly reduces to the hardness of decisional learning with errors problem in the standard model.
46361 针对非理想信道状态信息（CSI，channel state information）下的多小区下行时分复用（TDD，time division multiplexing）大规模多入多出（MIMO，multiple-input multiple-output）系统，研究了基于服务质量（QoS，quality of service）的发射功率和小区间泄露功率最小的波束成形问题。 In view of multicell downlink time division multiplexing (TDD) massive multiple-input multiple-output(MIMO) systems which had imperfect channel state information (CSI), the beam-forming problem that minimized the total transmit power and signal leakage power based on quality of service (QoS) was studied.
46362 首先，将目标问题近似成凸优化问题， First, the objective problem was approximated as a standard convex optimization problem.
46363 然后，利用上下行链路对偶性，提出一种内外层迭代算法。 Then, by using the duality of uplink and downlink, an inner and outer layer iterative algorithm was proposed.
46364 数值分析结果表明，所提算法与其他几种典型的多小区波束成形算法相比，在算法复杂度和能量效率性能指标方面具有明显优势。 Numerical results show that, comparing with other typical downlinkmulticell massive MIMO beam-forming algorithms, the proposed algorithm has obvious advantages in terms of complexity and energy efficiency.
46365 提出一种 ad hoc 移动云计算方案，即移动设备通过分享邻近设备的闲置资源，将任务卸载至邻近设备协助处理。 An ad hoc mobile cloud had been proposed to offload workload to neighboring mobile devices for resource sharing.