User distribution is a critical issue in cellular networks. In most previous works, a uniform user distribution is often assumed within a cell. In this paper, we purpose a non-uniform user distribution model. Both its effects on downlink and uplink capacities of a cellular network are evaluated under two common packet scheduling algorithms: Maximum Carrier to Interference scheduling and Round R...

This paper presents a spatial fading emulator for evaluating handset MIMO antennas in a cluster environment. The proposed emulator is based on Clarke’s model and has the ability to control RF signals directly in spatial domain to generate an accurate radio propagation channel model, which includes both uniform and non-uniform angular power spectra (APS) in the horizontal plane. Characteristics ...

Metal-organic framework (MOF) membranes have received increasing attention as adsorbents, yet the defects in most membrane structures greatly thwart their capacity performance. In this work, we fabricated a novel ZnO/2-methylimidazole nanocomposite with multiple morphology by electrochemical method. The nanocomposite provided sufficient and strong anchorages for the zeolitic imidazolate framewo...

ABSTRACT: This study focuses on investigating the relationship between the bearing capacity of uniform sands and fractal dimensions calculated by different methods. California bearing ratio (CBR) tests are performed on 15 different soils to estimate the bearing capacities. A minimum number of 100 grains for each soil are investigated under a stereomicroscope. Applying the areaperimeter, line di...

The stiffened rectangular plate was usually adopted in the blast airtight doors. In order to improve the buckling capacity of stiffened rectangular plate under uniform normal compression, the optimization model of stiffened rectangular plate was set up based on APDL and ANSYS commands, and the sequential linear programming method was executed to optimize the thickness of plate and the sizes of ...

This paper investigates the conditions under which dominant airlines internalize self-imposed delays in a deterministic bottleneck model of airport pricing, complementing the similar analysis of Brueckner and Van Dender (BVD, 2008) for the standard congestion-pricing model. A unified model of bottleneck tolling includes untolled, uniform-, coarse-, multi-step-, and continuous-toll equilibria as...

Fluids with competing short range attraction and long range repulsive interactions between the particles can exhibit a variety of microphase separated structures. We develop a lattice-gas (generalised Ising) model and analyse the phase diagram using Monte Carlo computer simulations and also with density functional theory (DFT). The DFT predictions for the structures formed are in good agreement...

The capacity of Multiple Input Multiple Output (MIMO) systems has received much attention in recent years. In this paper, we analyse the capacity of MIMO systems for the 3GPP-3GPP2 Spatial Channel Model (SCM). We examine the impact of number of antennas, inter-element distance and mutual coupling, assuming both waterfilling and uniform transmit power allocation schemes, for different SCM scenar...

We define classical–quantum multiway channels for transmission of classical information, after recent work by Allahverdyan and Saakian. Bounds on the capacity region are derived in a uniform way, which are analogous to the classically known ones, simply replacing Shannon entropy with von Neumann entropy. For the single receiver case (multiple access channel) the exact capacity region is determi...

Our objective is to nd a theoretical watermarking capacity bound of digital images based on domain-speci c masking e ects. In this paper, we rst show the capacity of private watermarking in which the power constraints are not uniform. Then, we apply several domain-speci c Human Vision System approximation models to estimate the power constraints and then show the theoretical watermarking capaci...