摘要：The relay node with linear relaying transmits the linear combination of its past received *** optimization of two-hop relay channel with linear relaying is discussed in this *** capacity for the two-hop Gaussian relay channel with linear relaying is derived,which can be formulated as an optimization problem over the relaying matrix and the covariance matrix of the signals transmitted at the *** is proved that the solution to this optimization problem is equivalent to a "single-letter" optimization *** also show that the solution to this "single-letter" optimization problem has the same form as the expression of the rate achieved by Time-Sharing Amplify and Forward(TSAF).In order to solve this equivalent problem,we proposed an iterative *** results show that if channel gain of one hop is relatively smaller,the achievable rate with TSAF is closer to the max-flow min-cut capacity bound,but at a lower complexity.

摘要：With the combination modes of engine and two electric machines,the power split device allows higher efficiency of the *** operation and of a power split HEV are analyzed,and the system dynamic model HEV is established event-driven for HEV forward system simulation dynamics controller *** the mode,the fact the mode that the operation modes of is the are and the the is continuous ***-driven this for each structure selection of the controller built and the described finite with hybrid automaton control In control structure,process is depicted by the state mode machine(FSM).The multi-mode switch controller is designed to realize power ***,vehicle operations programming are optimized,and finite the prediction nonlinear model *** control(NMPC)strategy is applied by that implementing the dynamic(DP)and in the Comparative simulation The results optimal demonstrate strategy hybrid in control structure is effective feasible for HEV energy management *** is superior improving fuel economy.

摘要：The feature extraction algorithm plays an important role in face recognition. However, the extracted features also have overlapping discriminant information. A property of the statistical uncorrelated criterion is that it eliminates the redundancy among the extracted discriminant features, while many algorithms generally ignore this property. In this paper, we introduce a novel feature extraction method called local uncorrelated local discriminant embedding(LULDE). The proposed approach can be seen as an extension of a local discriminant embedding(LDE)framework in three ways. First, a new local statistical uncorrelated criterion is proposed, which effectively captures the local information of interclass and intraclass. Second, we reconstruct the affinity matrices of an intrinsic graph and a penalty graph, which are mentioned in LDE to enhance the discriminant property. Finally, it overcomes the small-sample-size problem without using principal component analysis to preprocess the original data, which avoids losing some discriminant information. Experimental results on Yale, ORL, Extended Yale B, and FERET databases demonstrate that LULDE outperforms LDE and other representative uncorrelated feature extraction methods.

摘要：OBJECTIVE:To explore the effect of SDF-1α on the development of experimental corneal neovascularization (CRNV).;METHODS:CRNV was induced by alkali injury in mice. The expression of SDF-1α and CXCR4 in burned corneas was examined by Flow Cytometry. Neutralizing anti-mouse SDF-1α antibody was locally administrated after alkali injury and the formation of CRNV 2 weeks after injury was assessed by Immunohistochemistry. The expression of VEGF and C-Kit in burned corneas was detected by RT-PCR.;RESULTS:The number of CRNV peaks at 2 weeks after alkali injury. Compared to control group, SDF-1α neutralizing antibody treatment significantly decreased the number of CRNV. RT-PCR confirmed that SDF-1α neutralizing antibody treatment resulted in decreased intracorneal VEGF and C-Kit expression.;CONCLUSIONS:SDF-1α neutralizing antibody treated mice exhibited impaired experimental CRNV through down regulated VEGF and C-Kit expression.

摘要：随着物联网、5G以及6G移动通信网络的快速发展,相应的加密算法需要同时适应云计算和雾计算环境,还需要具备包括属性撤销机制在内的细粒度加密功能,并且具备抵抗共谋攻击的能力.然而,目前这些理论及技术问题的研究还有待进一步发展和完善.本文提出一种适用于云雾集合环境的数据细粒度加密及共享方案(NDSS-FC),面向云雾计算综合环境,借鉴密文策略属性基加密(CP-ABE)算法结构,可以实现细粒度的加密访问控制,可以实现安全的属性撤销,可以动态地管理用户,可以实现外包解密以及抵抗共谋攻击.首先,通过设计雾节点构造新型CP-ABE结构,以保证云雾结合环境下安全的数据共享,并且通过雾节点为计算资源受限的用户执行外包解密服务.其次,通过结合新型CP-ABE结构与单向函数树(OFT)技巧,以分享、更新群密钥的方式保证安全的属性撤销.再次,通过多项式分发版本密钥,以计算、更新版本密钥的方式保证动态用户管理.再次,通过在用户密钥中嵌入随机因子,以抵抗共谋攻击.最后,性能分析和形式化证明显示NDSS-FC方案安全高效.

摘要：这份报纸为层次 TiO 的合成报导一个简单还有效的方法 2 -B nanowire@-Fe 2 O 3 nanothorn 核心分支基于一条逐步的热水的途径穿。同样制作的混合数组为锂离子电池作为高能力的阳极显示出出色的性能。在这研究的关键设计是核心分支混血儿体系结构，它提供大表面不仅为锂离子插入 / 抽取的活跃地点，而且为电子和锂离子由于减少的散开路径启用快费用运输。 TiO 的属性的古怪联合 2 (好结构的稳定性)和 Fe 2 O 3 (大特定的能力)向混合数组电极提供几理想电气化学的特征：大可逆能力(800 mAstalline 和大区域瞬间 由化学蒸汽免职方法的 2 层。先锋的数量的小心的控制在大区域的合成被发现到关键因素高度水晶的薄片。层的厚度被拉曼光谱学和原子力量显微镜学证实。光性质和化学作文被光致发光(PL ) 和 X 光检查光电子光谱学学习。在 1.82 eV 的强壮的直接激子的排出物的出现(A 激子，与规范的 PL i 械 ? 械？？

摘要：锂离子电容器通常由一个电池型负极和一个电容型多孔炭正极组成,可输出比传统双电层电容器高两倍的能量密度,但是在高倍率条件下其能量密度低、循环寿命短,因而其广泛应用受到阻碍.本文通过模板法合成了一种结构高度无序、氮/磷共掺杂的分级介孔炭纳米球.这种分级多孔结构有利于锂离子的快速迁移,且高度无序的结构和高杂原子含量为锂离子电荷存储提供了丰富的活性位点.电化学测试表明,该炭纳米球负极具有较高比容量(在0.1 A g^(-1)时,为1108.6 mA h g^(-1)),优异的倍率性能(在8 A g^(-1)时,为276.5 mA h g^(-1)),以及良好的循环稳定性(1000次循环后仍保持85%的容量).以该分级多孔纳米球为负极,自制活性炭为正极所组装的锂离子电容器具有较高的能量密度(103 W h kg^(-1))、功率密度(44,630 W kg^(-1))以及长循环寿命(>10,000圈).该工作揭示了如何通过在纳米/原子尺度上调控炭材料微结构来提高电化学性能的方法,为设计高性能的储能设备提供了新策略.

摘要：有在从 metalorganic 框架(ZIF-8 ) 导出的做氮的多孔的碳(NPC ) 上支持的不同作文的分散得好的二金属的 NiRh nanoparticles (NP ) 通过一个合作减小方法被综合。NPC-900 支持了 NiRh 催化剂展览向从肼的氢产生的最高催化的活动和 100% 氢选择。这些性质可能被归因于高表面区域和 NPC 的高 graphitization。这策略可以为由作为支持利用 NPC 抛锚设计高效的催化剂开创一条新大街为另外的应用的活跃金属 NP。

摘要：基于二维过渡金属硫化物的全包覆晶体管是后硅时代的理想电子器件,从玻尔兹曼输运理论出发,在考虑载流子的主要外秉散射机制后,针对三种典型的栅介质(Al_(2)O_(3),HfO_(2)和BN)构筑的单层MoS_(2)晶体管的电学性能进行了系统的理论研究。为解决介质中表面光学声子散射被高估这一常见问题,使计算更为准确,在电介质和沟道间的建模中引入了“死区”概念。重点针对微电子1nm及以下技术节点用途晶体管的电荷迁移率和电流密度等指标进行了探讨.研究表明,在沟道长度小于10nm的情况下,晶体管开态电流均可超2mAμm。上述结果阐明了基于单层半导体构筑晶体管在终极微缩条件下的性能潜力,对深度摩尔器件设计具有一定的参考价值。

摘要：螺旋二色性利用无限的轨道角动量自由度,可以突破依赖于固有自旋自由度的圆二色性所受到的两态限制,为探索经典波体系中的手性效应提供了重要的手段.然而,在波与物质相互作用过程中,手性信号通常非常微弱,使得螺旋手性效应的有效增强极具挑战性.本文通过在非厄米梯度超构表面的内禀拓扑荷中构建手性奇异点,提出了一种实现最大螺旋二色性的新范式.由于奇异点所诱发的非对称手性耦合特性,非厄米梯度超构表面可以通过灵活地设计,实现多样化的极端手性调控:一种手性的涡旋场被非厄米超构表面完全反射,而相反手性的涡旋场则可以被完美吸收或传输到定制的涡旋模式.作为最大螺旋二色性的一种体现,本文提出完美手性选择的涡旋传输现象,并通过声学实验进行了验证.本研究为实现最大手性效应以及探索波与物质相互作用中的手性物理提供了新途径,有望推动诸如非对称手性调控、单向传播和信息多路复用等轨道角动量相关的基础研究和应用领域的发展.