Device-to-Device (D2D) communication will become an important technology in future networks with the increase of requirements local services. The interference between cellular and D2D can be coordinated by proper power control resource allocation. In this paper, we analyze allocation methods for underlaying networks. A novel method that reuse resources more than one user is proposed. After that, discuss selection optimal from proposed conventional methods. Finally, performance different...

In order to solve the problem that existing resource allocation strategies cannot give integrative consideration QoS, spectrum efficiency for mixed traffic, this paper proposes a utility-based algorithm traffic in wireless networks. The unified utility function users with different traffics is studied first. After that, optimization model established based on function. A heuristic solution of proposed scenario after analyzing model. which has lower complexity than work can automatically...

Molecular layers attached to a silicon nanowire field effect transistor (SiNW FET) can serve as antennas for signal transduction of volatile organic compounds (VOCs). Nevertheless, the mutual relationship between molecular and VOCs is still puzzle. In present paper, we explore layer’s end (functional) groups on sensing properties VOCs. Toward this end, SiNW FETs were modified with tailor-made that have same backbone but differ in their groups. Changes threshold voltage (ΔVth) changes...

Cognitive radio (CR) is a promising technology enabling efficient utilization of the spectrum resource for future wireless systems. As CR networks are envisioned to operate over wide frequency range, advanced wideband sensing (WBSS) capable quickly and reliably detecting idle bands across span essential. In this article, we provide an overview recent advances on sub-Nyquist sampling-based WBSS techniques, including compressed sensing-based methods compressive covariance methods. An elaborate...

Federated learning (FL) is an emerging machine paradigm that allows to accomplish model training without aggregating data at a central server. Most studies on FL consider centralized framework, in which single server endowed with authority coordinate number of devices perform iterative manner. Due stringent communication and bandwidth constraints, such framework has limited scalability as the grows. To address this issue, paper, we propose ConFederated Learning (CFL) framework. The proposed...

We study the Dirichlet problem for functions whose graphs are spacelike hypersurfaces with prescribed curvature in Minkowski space and we obtain some new interior second order estimates admissible solutions to corresponding fully nonlinear elliptic partial differential equations.

Perovskite solar cells (PSCs) have achieved a huge success in power conversion efficiency (PCE), although they still suffer from the long-term stability problem caused by intrinsic sensitivity of perovskites to moisture. 2,2′,7,7′-Tetrakis (N,N-di-p-methoxyphenylamine) 9,9′-spirobifluorene (Spiro-OMeTAD) is widely used as hole transport layer (HTL) typical PSCs; meanwhile, bis(trifuoromethane)sulfonimide lithium salt (Li-TFSI) necessary an additive Spiro-OMeTAD HTL improve mobility. However,...

A stable high-order mode version of a ladder-type RF circuit (ladder cavity) is proposed to overcome the frequency limits commonly used fundamental counterpart for development millimeter-wave and higher extended interaction oscillators (EIOs). The specific design operated its analysis based on characteristic carried out. study transverse shows potential TM31 in establishing more sufficient axial electric field than TM11 large size cavity. To enable overwhelm other possible competing modes...

We present a compact and efficient design for slanted grating couplers (SLGC's) to vertically connect fibers planar waveguides without intermediate optics. The proposed SLGC employs strong index modulated grating. With the help of genetic algorithm-based rigorous tool, 20microm-long with 80.1% input coupling efficiency has been optimized. A mode analysis reveals that phase-matching condition Bragg are satisfied simultaneously respect fundamental leaky supported by optimized SLGC.

We introduced a phase-locking mechanism of millimeter-wave magnetrons coupled through carefully designed coupling bridge. For such structure, two Ka-band 22-vane rising-sun magnetron circuits operated in the <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\pi $ </tex-math></inline-formula> -mode were phase-locked tightly as whole double-ridged coupler. Moreover, coupler was optimized to suppress mode...

Massive multiple-input-multiple-output (MIMO) wireless communications refers to the idea equipping transmitters with a very large number of antennas and has been shown potentially allow for orders magnitude improvement in spectral energy efficiency using relatively simple (linear) processing. In this letter, we consider scenario that multiple links transmit vicinity each other simultaneously same time-frequency resource. With limitations an infinite receiver at link, use...

In a dynamic spectrum access (DSA) network, multi-carrier-based cognitive radio transceivers need to deactivate some of their subcarriers avoid interference primary users. mobile environment, the spread orthogonal frequency-division multiplexing (SOFDM) system has demonstrated excellent performance in multipath fading channels, outperforming traditional OFDM due diversity gain. The SOFDM uses Hadamard-Walsh code as spreading set, which case, when deactivating subcarriers, orthogonality among...

A highly reliable embedded logic multitime-programmable nonvolatile memory (NVM) has been developed in a standard 90-nm process with no changes and zero-mask adder. By using novel work-function-engineered tunneling device 70-Aring oxide, an excellent endurance of more than 500 k cycles achieved. Reliability the NVM is evaluated against traditional device, model proposed to explain observed reliability differences. Process manufacturability on retention also demonstrated over variations...

In vacuum electronics, the influence of uniformity electron beams on performance two- or multi-beam devices is a key scientific problem in development compact, high power millimeter-wave and terahertz (THz) sources. this letter, we focus extended interaction oscillators (EIOs) propose tractable resonant circuit that has no requirement for beams. The design builds up TM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">13</sub> mode mechanism to...

We consider the problem of joint beamforming and access point (AP)-user association for downlink millimeter Wave (mmWave) cell-free (CF) massive MIMO systems. Such a is formulated into an integer-constrained optimization which aims at maximizing minimum average received signal power among users. Directly solving this NP-hard due to its combinatorial nature. To address difficulty, we first transform feasibility checking within bisection framework. Then alternating reflection algorithm...

The tunneling field-effect transistor (TFET) is a potential candidate for the post-CMOS era. In this paper, threshold voltage model developed new kind of device. First, two-dimensional (2D) models are used to describe distributions and electric field in channel two depletion regions. Then based on physical definition nanoscale TFET, developed. accuracy proposed verified by comparing calculated results with 2D device simulation data. It has been demonstrated that effects varying parameters...

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2014Broadband least-squares reverse time migration for complex structure imagingAuthors: Chong Zeng*Shuqian DongJian MaoBin WangChong Zeng*TGS, Shuqian DongTGS, Jian MaoTGS, and Bin WangTGShttps://doi.org/10.1190/segam2014-1283.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract We propose a practical solution overcome the...