Recently, for satisfying users' various mobile Internet service requests data exchange anytime and anywhere even in their moving vehicles, the generated traffic has been rapidly increasing become a serious burden on current cellular networks. To partially address such serve challenge, vehicular ad hoc networks (VANETs) have emerged as an effective approach enhancing services applications by equipping vehicles with wireless processing capabilities. In this paper, we survey recent advances...

The imaging quality of the aerodynamically heated optical dome was evaluated under comprehensive influence aero-optical transmission effect and aero-thermal radiation effect. ray propagating algorithm based on fourth order Runge-Kutta method used to trace target thermal dome. Three evaluation parameters were proposed evaluate effect: Modulation transfer function (MTF), irradiance, peak signal-to-noise ratio (PSNR) distorted images. results show that: as flight speed increased, MTF decreased...

Polycrystalline and monocrystalline α-BiFeO3 crystals have been synthesized by solid state reaction flux growth method, respectively. X-ray, neutron, electron diffraction techniques are used to study the crystallographic magnetic structure of α-BiFeO3. The present data show that crystallizes in space group P1 with a = 0.563 17(1) nm, b 84(1) c 70(1) α 59.33(1)°, β 59.35(1)°, γ 59.38(1)°, can be described modulation vector reciprocal q 0.0045a* - 0.0045b*, which is model proposed I. Sosnowska...

We investigated the influence of altitude on aero-optic imaging quality degradation hemispherical optical dome. Boundary conditions for aerodynamic heating effect dome were calculated by solving Reynolds-averaged Navier-Stokes equations provided FLUENT. The finite element model and thermal-structure simulation results obtained using ANSYS. 3D nonuniform refractive index field was according to thermal-optical effect. tracking method based fourth-order Runge-Kutta algorithm adopted simulate...

Traditional optical domes are spherical, which introduces constant aberrations with look angle. However, spherical not optimum for reducing aerodynamic drag. Conformal deviate from to reduce drag but they generate dynamic varying significantly angle in the field of regard. Thus, conformal require unique challenges aberration correction. This paper presents a method through designing inner surface domes. follows principle that axis ray imaging system maintains same direction after refraction...

A color transmission approach between a computer display and computer-generated holography (CCGH) colorimetric system is proposed based on matching theory. Firstly, the conversion quantities of CCGH discussed Secondly, isochromatic transfer relationship quantity amplitude object light field proposed. Thirdly, was encoded into hologram, then hologram reconstructed numerically. The simulation results demonstrate that our novel feasible.

As one of the most important technical support for "Wireless City", integration technologies WLAN and WMAN wireless heterogeneous networks attracts increasing attention. This paper proposes a new vertical handoff algorithm WIFI WIMAX network based on fuzzy comprehensive evaluation theory considering various factors such as signal strength, terminal moving speed to noise ratio, succeeds in completion experimental emulation NS2. The results indicate decreases "ping-pong "effect shows excellent...

This paper considers the optimal cell association and resource allocation for load balancing in a heterogeneous cellular network subject to user's quality-of-service (QoS) constraints.We adopt proportional fairness (PF) utility maximization formulation which also accommodates QoS constraints terms of minimum rate requirements.With equal this joint optimization problem is either infeasible or requires relaxation that yields solution difficult implement.Nevertheless, we show can be effectively...

A fundamental problem in optical and digital holography is the existence of speckle noise reconstructed image. Many approaches have been carried out order to overcome this problem. In paper a new technique reduce proposed based on physical nature noise. The illumination direction object beam changed provide different phase information for same recorded an off-axis holographic setup holograms are with directions. Then intensity images superposed averaged theoretical analysis experimental...

The brittleness index is one of the most integral parameters used in assessing rock bursts and catastrophic failures resulting from deep underground mining activities. Accurately predicting this parameter crucial for effectively monitoring bursts, which can cause damage to miners lead failure engineering structures. Therefore, developing a new capable essential safe efficient execution projects. In research study, novel mathematical developed, utilizing factors such as crack initiation,...

Reliability is expected to become a big concern in future deep sub-micron integrated circuits design. Soft error rate (SER) of combinational logic considered be great reliability problem. Previous SER analysis and models indicated that glitch width has impact on electrical masking latch window effects, but they failed achieve enough insights. In this paper, an analytical generation model proposed. This shows after inflexion point the collected charge exponential relationship with duration...

We develop a new solution approach for the traffic grooming problem by decomposing it into virtual topology and routing (VTTR) subproblem, RWA subproblem. solve VTTR subproblem with partial LP relaxation technique.

Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text X. Yang, Z. Hu, W. Zhou, A. Bidwai, H. Wang, and T. Poon, "Holographic Display Using Two On-axis Holograms without the Zeroth-Order Light Twin Image," in Digital Holography & 3-D Imaging Meeting, OSA Technical Digest (Optica Publishing Group, 2015), paper DTh4A.1. Export BibTex Endnote (RIS) HTML Plain alert Save article

Holography, in which three-dimensional (3D) information and texture of object is encoded with interference fringe a promising approach for 3D display. However, it challenge to make photographic hologram living object. In addition, impossible record scene combining real-existing objects virtual ones using holography. this paper, we propose method capturing displaying scene. Firstly, the shape color captured projection method. Secondly, computer generated fringe, called Computer-generated...

Three-stage catching bed reactor was used to treat domestic wastewater from residential area through the step feed in order get high efficiency of simultaneous nitrification denitrification(SND). The effect 3 influent flow rate distribution ratios (λ) on removal COD NH <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> <sup xmlns:xlink="http://www.w3.org/1999/xlink">+</sup> -N and TN investigated under conditions hydraulic retention time...

Hierarchical traffic grooming facilitates the control and management of multigranular WDM networks. We define hierarchical virtual topology routing (H-VTTR) problem, grooming-specific subproblem grooming, we present a suite ILP formulations to solve it. The represent various tradeoffs between solution quality running time.

In this paper, we examine the energy-performance tradeoff for sleep window adjustment in duplex VoIP transmissions. Specifically, modified traditional analysis model by giving a new mathematical to analyze performance of scheme, with natural talking speed, size, energy expenditure taken into consideration. Guided model, locate optimal parameters scheme. Extensive simulation results have validated analytical and indicated that, compared optimized scheme can achieve as much 90% reduction...

First, The 3D information and texture of scene is captured with a scanner moved on track. Then the partial computer-generated hologram (CGH) corresponding to every viewing point camera calculated.