Contract Theory-Based Incentive Mechanism for Full Duplex Cooperative NOMA with SWIPT Communication Networks

Cooperative Non-Orthogonal Multiple Access (NOMA) with Simultaneous Wireless Information and Power Transfer (SWIPT) communication can not only effectively improve the spectrum efficiency and energy efficiency of wireless networks but also extend their coverage. An important design issue is to incentivize a full duplex (FD) relaying center user to participate in the cooperative process and achieve a win–win situation for both the base station (BS) and the center user. Some private information of the center users are hidden from the BS in the network. A contract theory-based incentive mechanism under this asymmetric information scenario is applied to incentivize the center user to join the cooperative communication to maximize the BS’s benefit utility and to guarantee the center user’s expected payoff. In this work, we propose a matching theory-based Gale–Shapley algorithm to obtain the optimal strategy with low computation complexity in the multi-user pairing scenario. Simulation results indicate that the network performance of the proposed FD cooperative NOMA and SWIPT communication is much better than the conventional NOMA communication, and the benefit utility of the BS with the stable match strategy is nearly close to the multi-user pairing scenario with complete channel state information (CSI), while the center users get the satisfied expected payoffs.     

Full counting statistics of phonon transport in disordered systems

The coherent potential approximation (CPA) within full counting statistics (FCS) formalism is shown to be a suitable method to investigate average electric conductance, shot noise as well as higher order cumulants in disordered systems. We develop a similar FCS-CPA formalism for phonon transport through disordered systems. As a byproduct, we derive relations among coefficients of different phonon current cumulants. We apply the FCS-CPA method to investigate phonon transport properties of graphene systems in the presence of disorders. For binary disorders as well as Anderson disorders, we calculate up to the 8-th phonon transmission moments and demonstrate that the numerical results of the FCS-CPA method agree very well with that of the brute force method. The benchmark shows that the FCS-CPA method achieves 20 times more speedup ratio. Collective features of phonon current cumulants are also revealed.     

不可分辨跃迁阵模型下类镍金离子M带谱的理论计算

 用不可分辨跃迁阵模型(UTA model)计算类镍金(Au ⁵¹⁺)谱中8个跃迁阵的特征参数: 平均波数(kav)、半宽度(FWHM)、总强度(W)和谱线数(L)。利用高斯分布线型,根据各个阵的总强度进行叠加,得到了在总体上与实验相一致的结果,使得在实验中对金M带谱进行时间或空间的高分辨率测量成为可能。     

中国古典诗词的朦胧与翻译

由于语言的、文化的、文学传统的原因。中国古典诗词在人称指示、形象意境、主题情调几个方面表现出独特的。朦胧美”。英译中国古典诗词重在传达原诗之“意”。诗词的朦胧要求我们在翻译时要更深入。更准确地理解其隐含或潜在的意思。诗词的“达诂”。译者要利用语篇、背景和常识性的知识以及借助“想象”去深入理解。     

Efficient and Low-Latency Systolic Array Architecture for Full Searches in Block-Matching Motion Estimation

IntroductionEmerging applications such as interactive videocommunication,digital broadcasting,and digitalstorage media require video compression.Thecomputational complexity requires hardware forreal time processing.A central component of video compression isthe motion estimation unit,which exploits thetemporal redundancy of a video sequence.Block-matching,the most popular motion estimationmethod,searches for a motion vector thatminimizes the distortion error between amacroblock of a frame to b…     

常微分方程初值问题的多重网格解法

将多重网格方法应用于隐式Runge-Kutta公式,得到一种常微分方程初值问题的数值解法。还具体构造了多重网格分量,并分析了方法的阶,给出了一种以分步推进式的多重网格方法求第一次近似值的过程,从实例看,应用此法所得的解有非常好的精确度。     

CsCrCl_3晶体的光谱研究

本文基于弱场图象，利用Ｒａｃａｈ不可约张量算符法，建立了ｄ４（Ｃ＇３ｖ）离子含旋轨耦合作用的完全能量矩阵。借助此矩阵，利用完全能量矩阵的对角化方法，对ＣｓＣｒＣｌ３晶体的光谱进行了理论计算，其结果同实验结果很吻合。同时，本文从理论上证明了２３２２８ｃｍ（－１）、２３３１０ｃｍ（－１）这两条强谱线产生于双中心跃迁。     

闸底板优化设计

为了提高涵闸底板的设计质量和设计水平，从实际涵闸工程设计入手，提出了变截面双悬臂闸底板的计算模型；同时采用满应力准则法设计了六种形式的双悬臂闸底板，结果表明，采用连续板式或分离式闸底板式设计可节省工程量２０％以上。     

线性变换可逆的充要条件

线性变换是线性代数的一个主要研究对象,也是最基本的一种变换,其中可逆线性变换又是线性变换的重要组成部分,本文从多个角度讨论可逆线性变换,得到线性变换可逆的十三个等价命题,从而对可逆线性变换有比较全面的理解.