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To meet the ever-increasing data traffic demand, heterogeneous cellular networks (HCNs) are to be deployed for wireless communication and coordinated multipoint (CoMP) is thought to be desirable to further improve the performance of HCNs. This paper considers the problem of base station (BS) cooperation in the downlink of HCNs. A novel and flexible cross-tier cooperative scheme is proposed in the...
Considering the influence of the weather conditions to incoming solar radiation, this paper analyzes the relation among the sunshine, weather types, and radiation parameters, then divides them into 4 types of common weather (perfectly clear, generally clear, generally cloudy and perfectly cloudy). Diffuse model, diffuse proportion, and transitivity correspond to the different weather types. Taking...
The traditional strategies of loop path selection like Z-path strategy will simplify the structure of loops and limit the iteration of loops to make the process of paths easy. But these strategies will lead to imprecise problems and hamper further improvement of the coverage scope, because the incompletely unfolding of loops usually ignores many detailed paths. To solve above problems, this paper...
Cyber-Physical Systems (CPSs), characterized by deeply integrating computing, communication and control, are large-sale, complex, embedded systems with hybrid characteristic. The uncertainty of discrete states and concurrency of continuous process, caused by hybrid interaction between computing and physical process, make it difficult to be fully described by the traditional hybrid model. In view of...
While in the past, the silicon, package and system could be designed sequentially, at silicon nodes less than 40nm, the interconnects between the chip, package and system are becoming the limiting factor in performance and reliability. To better capture the warpage and fatigue, an improved slice model with much more detail about the bumps, microbumps, underfill, fillet etc., was simulated. The silicon...
With continuing miniaturization and more prevalent use of Ball Grid Array (BGA) packages in the microelectronics industry, the mechanical strength of Printed Circuit Board Assemblies (PCBAs) with BGA packages is becoming very critical. In a variety of applications ranging from smart phones to high end switches and routers, the mechanical robustness of PCBAs is becoming the key differentiator in product...
There are many multivariate forecasting models which incorporate weather indicators and other information for wind farm power output forecasting. In most situations, performance of these individual models is problem-dependent. Thus, it is difficult for forecasters to choose the right technique for unique situations. In this paper, firstly, indicators such as wind speed, and wind direction are analyzed...
In this paper, four new forecasting models ¨C univariate LS-SVM model and three hybrid models of ARIMA and LS-SVM models are introduced for wind power output forecasting. Historical data of 78 wind farms are used to compare and evaluate the performance of the best models. Empirical analysis indicates that the proposed univariate LS-SVM model and hybrid models can not significantly outperform linear...
Studying crop potential model system based on GIS and distributed computing architecture may effectively improve computational efficiency and enhance the independence of the model system. Firstly, the paper constructed crop output potential model system based on distributed computing architecture. Secondly, the paper designed the model system of crop output potential under network environment and...
Aiming at the problems of the wear condition monitoring, grey theory and auto-regressive combination forecasting model was put forward, and the combination model was build. The rough trend of the wear particle content change can be reflected through grey theory, and the detail of the change can be reflected through auto-regressive model. By testing and comparing a set of Ferro graphic data, the result...
Multipath inter-domain routing can solve many technical flaws which have been exposed in BGP, but the market-driven factors have more direct relationship with its deployment. In order to analyze impact of these market-driven elements, this paper established an optimization model for Internet service provider (ISP) revenues based on user's utility function. Then, the solution using Lagrange multiplier...
A concentrator-based load balancing multi-path self routing switching fabric(LB-MPSR-C) was proposed recently, which was based on sorting concentrators, load-balanced and Birkhoff von-Neumann switching theory. This structure can achieve 100% throughput under admissible traffic pattern, its scalability for super large scale switching system and property of lowest hardware complexity have been deeply...
Mobile agent system provides us with a new way to realize distributed collaborative information processing in sensor networks. In this paper, we present a middleware to realize mobile-agent-based data fusion on wireless sensor networks nodes, which is implemented entirely in TinyOS and has been tested on TelosB motes. It consists of two parts. One is the strategy for the serialization of algorithm...
In this paper, the virtual simulation system of power plant be developed on Web environment with the technologies of graphic model and virtual DCS. The system simulates the 600 MW coal-fueled power unit, distributed control system (DCS) of Foxboro I/A and digital electro hydraulic system (DEH) of GE XDPS. The initial data would be imported from real-time database (RTDB) of InStep eDNA. Designing concept,...
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