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As an important aspect of the hardware resource consolidation in virtualization environment, memory consolidation and over-commitment has been motivated by the increasing elastic computing cloud platform. The most popular consolidation technology, Memory Balloon, might introduce serious performance penalty with thrashing when guest memory usage changes dramatically. In order to overcome the drawback...
Large amount of data are generated in Global Navigation Satellite System (GNSS) simulation task, and the preservation and transmission of these data are a complex and time-consuming work. The data compression is an appropriate approach to solve the above problem. In this paper, the most mature and widely used lossless compression algorithm-the LZW algorithm is cited. For overcoming higher compression...
The present status of transmission planning is reviewed from various viewpoints and the new requirements of transmission planning resulting from development of electricity markets are discussed. In the deregulated electricity market, there is no longer centrally coordinated planning of new generation or closure of existing generation, which are basically at the generation companies' own discretion,...
Vehicular ad hoc networks (VANETs) have attracted much attention over the last few years. Localization and position information of vehicles is very significant in VANETs; this is a result of the special nature of VANETs. In this paper, we propose a location verification approach to prevent position-spoofing attacks on VANETs. Cooperative Location Verification (CLV), which is our approach, basically...
A planar Continuous Transverse Stub (CTS) array is proposed in this paper. The technology of Multi-step impedance matching is utilized, which improve the antenna operating frequency bandwidth. Being different from the conventional forms, the structure of feed network consists of E-plane bends, E-plane tees and multi-stage steps. Properties of this form antenna are obtained by the HFSS. The results...
As the foundation of cloud computing, Server consolidation allows multiple computer infrastructures running as virtual machines in a single physical node. It improves the utilization of most kinds of resource but memory under x86 architecture. Because of inaccurate memory usage estimate and the lack of memory resource management, there is much service performance degradation in data centers, even...
In the three-phase power supply system, the power factor and unbalanced three-phase power supply can affect the quality of important factors, but the existing compensation is difficult in the reactive power compensation with changing the original three-phase unbalanced load into three-phase symmetrical load of the power supply system. Thus, in the case of three-phase imbalance, this paper proposes...
This paper presents a method that the voltage/current characteristic of the high power, nonlinear and time varying load is modeled by using artificial neural network, this method is implemented by using back propagation network and look up tables which accurately establish high power load model and receive the consumption of the active, reactive and apparent power and voltage distortions in different...
A novel approach is proposed for the layering and zoning (LAZ) optimization design of Ultra-high voltage (UHV) receiving power network. The method operates by joint use of framework representation and intermittent distributed computing. Structure graph model and information framework is first established to facilitate the analysis of network performance. Furthermore, a comprehensive evaluation system,...
In recent years, as coal prices rise, especially the poor coal prices remain high, and has been in short supply in the state, resulting in increasingly high cost of power generation and operating profit has been declining. This study used the ways of high-temperature heating furnace smoke plus cold wind sent pink to improve the dry milling system and explosion capabilities.
Continuous Transverse Stub (CTS) planar array antenna was firstly invented in early 1990' [1]-[3]. The advantages of this type array include compact format, light weight, low loss and insensitivity to dimensional tolerances accuracy [2]. Besides, the present forms of CTS antenna have wide bandwidth, low dissipative losses compared with the conventional planar antennas. And it has been successfully...
Clustering is used extensively in wireless sensor networks to optimize lifetime. Within clustering, the optimization of cluster head (CH) location is critical since CHs consume energy faster and have greater influence on lifetime than non cluster head (NCH) sensors. Energy harvesting wireless sensor networks (EH-WSNs) use energy harvesting devices to harvest energy from environment. In contrast with...
Increasing Internet business and computing footprint motivate server consolidation in data centers. Through virtualization technology, server consolidation can reduce physical hosts and provide scalable services. However, the ineffective memory usage among multiple virtual machines (VMs) becomes the bottleneck in server consolidation environment. Because of inaccurate memory usage estimate and the...
In the process of arc splitting in low voltage switching devices, the flow field in arc chamber plays an important role. In order to accelerate the arc quenching, one of the most common methods is to enhance the gas flow through adding gas material in arc chamber currently. Meanwhile, in the recent research, it has been found that improving the flow field through optimum structural design of arc chamber...
In order to explore the influence of various fixation method on vibration fatigue reliability of high density PCB assembly, a three-dimensional simulation model which was almost completely in keeping with test samples was created, and the modal parameters were obtained through modal test and finite element method respectively. Based on the verification of FEM Model correctness, through designed different...
An overview of meteorological applications of polarimetric radars is presented. Both well proven implications of polarimetric radar measurements which are ready for operational implementation and promising new directions of research are outlined.
Fibre channel has been applied comprehensively to the new generation of avionics system. This paper presents the design and implementation of a high flexibility, XML-based configuration system of fibre channel avionics system, namely FC-X.
We investigate link-state advertising in multi-domain networks with dynamic traffic. A novel triggering scheme is proposed to monitor a subset of domain links, and thereby achieve a balance between salability and accuracy.
We report a method that combines external phase contrast microscopy, Raman spectroscopy and optical tweezers to monitor a variety of changes during the germination of single bacterial spores.
Multiple-trap Raman tweezers and differential interference contrast microscopy were used for simultaneously monitoring the germination dynamics of multiple individual bacterial spores.
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