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Alberta power grid is connected to the Western Interconnection of North America via three tie-lines to BC Hydro, where BC Hydro and the rest of WECC system are modeled as a single radial connection in network applications of EMS. With the addition of another tie-line in 2013, the “Montana-Alberta Tie-Line”, it is necessary to revisit how the WECC system should be modeled in network applications. This...
Cloud computing provides outsourcing of resources bringing economic benefits. The outsourcing however does not allow data owners to outsource the responsibility of confidentiality, integrity and access control, as it still is the responsibility of the data owner. As cloud computing is transparent to both the programmers and the users, it induces challenges that were not present in previous forms of...
Derived field generation is a critical aspect of many visualization and analysis systems. This capability is frequently implemented by providing users with a language to create new fields and then translating their "programs" into a pipeline of filters that are combined in sequential fashion. Although this design is highly extensible and practical for development, the runtime characteristics...
Based on the combined tangential formulation (CTF) of surface integral equation, the lower triangular approximate Schur preconditioner (LTASP) is combined with multilevel fast multipole algorithm (MLFMA) for MoM analysis of electromagnetic scattering from electrically large 3-D homogeneous objects. The coefficient matrix of the near-field coupling element was selected to set up the approximate matrix,...
In this paper, we propose an efficient Ordered statistic decoding (OSD)-aided turbo decoding algorithm for LTE turbo codes to improve the error performance of conventional turbo decoding. More significant performance gain can be achieved for short codes and high-rate punctured codes. Considering the Log-likelihood ratio (LLR) oscillation, we introduce a more reliable method to reconstruct ordered...
In this paper, we propose an SLVA-aided turbo decoding scheme for free-space optical (FSO) communication systems. FSO communication is a promising solution for high-rate point-to-point communication, but its performance is severely corrupted by the effects of strong atmospheric turbulence. Simulation results show that our proposed decoding scheme obtains noticeable gains over the conventional turbo...
This article mainly introduces the harmonic detection algorithm of harmonic restrain. The traditional algorithm harmonic detection has some disadvantages that can not directly regulate main circuit of AC and DC side energy exchange, but affects the performance of active power filters which are insufficient, this article puts forward improved harmonic detecting algorithm based on fuzzy PI control in...
In this paper, a hybrid scheme named IE-DDM-MLFMA with forward-backward method is proposed to calculate the scattering from the perfectly electric conducting body of translation. The computational body of translation can be partitioned into translational non-overlapping subdomains. Each of integral equation systems are solved separately, thus reducing the complexity of the original problem Moreover,...
This paper presents a unified modeling and solving approach for multiphysics topology optimization. A multiphysics continuum field is usually controlled by certain partial differential equations (PDE). Based on the general form of the PDE, this paper presents the mathematical model of the multi-objective multiphysics topology optimization, derives the unified solving scheme of the PDE, gets the sensitivities...
A multi-mode screensaver for embedded system is designed to realize autonomous power management and improve utilization of system resource. Application of a three-mode screensaver, including Black Screen (Mode_B), Photo Slide (Mode_P) and Clock Display (Mode_C), has been validated on a multimedia platform based on μC/OS-II embedded system. During its engineering implementation, optimizations on code...
In this paper, a hybrid scheme named IE-DDM-MLFMA with Gauss-Seidel iteration is proposed to calculate the scattering from the perfect electric conductor body of translation. The computational body of translation can be partitioned into concentric non-overlapping subdomains. Each of integral equation systems are solved separately, thus reducing the complexity of the original problem. For the solution...
In this paper, we introduced domain decomposition based integral equation (IE) methods for complicated multi-scale problems. The first multi-scale problem is solving electromagnetic scattering from a perfectly electric conductor with complicated geometry. A hybrid IE-DDM-MLFMA with Gauss-Seidel iteration is developed. As non-overlapping DDM, it has the advantage of flexible dividing domain and no...
The design of a 1.32 GHz microstrip antenna with polarization diversity using commercially available low-loss packaged RF-MEMS switches is presented. Two OMRON single-pole double-throw (SPDT) switches are used in a novel re-configurable feed network which is able to provide four polarization states; vertical, horizontal, left-hand circular and right-hand circular polarizations. A hardware demonstrator...
Individual recognition is the technique which recognizes person's identity through his gait. Gait energy image (GEI) is a classical gait representation and it can be decomposed into structural part and detailed part. Then virtual gait energy image (VGEI) can be constructed in virtual space by integrating those two different parts. The generalized principal component analysis (GPCA) is applied to VGEI...
This paper addressed the evaluation of Temperature Independent Spectral Indices of Emissivity (TISIE) in Land Surface Emissivity (LSE) retrievals over an eastern China area (110°E–125°E, 35°N–50°N) using Radiative Transfer Modeling (RTM) experiments with the products (MOD11C1, MOD11_L2 and MOD07) of the MODerate resolution Imaging Spectroradiometer (MODIS) on Terra in Sept. of 2007. The results show...
Nowadays with the development of freeway the traffic accidents have been increasing. Among the accidents, the rear-end collisions account for a large proportion and the researches on Automotive Rear-end Collision Warning Technology (ARCWT) have become a hot topic. In this paper, we talk about the Automotive Rear-end Collision Warning Technology, such as ARCWT based on machine vision, ARCWT based on...
Multiple virtual networks sharing an underlying substrate network is considered a promising tool to diversify and reshape the future inter-networking paradigm. As a simple and straightforward approach, the static bandwidth allocation in virtual networks (VNs) can often be inefficient in practice, and the adaptive allocation scheme with a small time-scale may lead to the transient network and service...
Cloud transformations require dynamic redistribution of resources across cloud infrastructure. From a legal perspective this movement of data from one data processor to another without the explicit consent of the data subject is a threat to data privacy. Levels of assurance and accountability have to be provided from the cloud infrastructure providers to the data subject in order to maintain trust...
A simple compact multi-band planar inverted-F antenna(PIFA) for mobile devices is presented. The particular shape of the proposed PIFA patch is a compact rectangle with several slits. These slits separate the patch into two resonant paths, generating two bands of about 900 and 1800MHz. The obtained bandwidth covers CDMA, GSM, DCS1800, and PCS1900 bands. Details of proposed antenna design and experimental...
A spiral case structure with cushion layer has been analyzed by three-dimensional nonlinear finite element method based on ABAQUS and the influence of contact friction characteristic between steel spiral case and surrounding concrete on the stress status of the structure are studied. When the contact slippage is considered, the load bearing ratio of the steel spiral case will increase and its average...
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