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With spreading using of switch type arc extinguishing in 10 kV distribution network, it is necessary to study the over-current on traditional PT (potential transformer) during arc extinguishing. Firstly, the mechanism of Ferroresonance and low frequency oscillation, which is motivated by single-phase grounding and disappear during arc extinguishing, is theoretically introduced; secondly, a test platform...
As known to all, photometric and colorimetric quality of LED illumination mainly depends on LED chip, phosphor and sealant. The investigation on failure mechanism of the three parts carries critical meanings for improving reliability of LED production. This paper mainly focus on reliability and failure mechanism of the three kinds of phosphor and three kinds of sealant which are wildly used in high...
The increasing scale of multi-core processors are likely to be randomly heterogeneous by design or because of diversity and flaws. The latter type of heterogeneity introduced by some unforeseen variable factors such as the manufacturing process variation is especially challenging because of its unpredictability. In this environment, thread scheduler and global power manager must handle such randomly...
Nowadays, more and more physical devices embed computing and networking capabilities and are visible on the Internet. These devices include webcams, net-printers, and industrial control equipments, etc. Collecting information about these devices is crucial to preserve cyber-security and facilitate security auditing for system administrators. In this paper, we propose a scalable framework for physical...
The problems of resources and the environment has become an important factor which restricts the sustainable development of the countries all over the world. Green architecture as the field of the road of sustainable development is particularly important. Improved design of green building, green building evaluation standard and perfect quality management system, improve the green building technology...
In view of the present cloud security problem which has been becoming one of the major obstacles hindering the development of the cloud increasingly, put forward a kind of technology implementation of memory security isolation based on Xen. And based on the Xen virtual machine monitor system, analysis the implementation approach of memory virtualization in the model, using Xen virtualization system...
Wind energy, as an important part of the new energy, is a power generation of the most mature technology, the most commercial development conditions and broad prospects in the new energy fields. As an important part of the wind turbine, therefore its control system has also been full attention of the world, and it has become a hot topic. Wind turbine control system has become a major problem if wind...
A broadband substrate integrated dielectric resonator antenna (BSIDRA) is presented and investigated experimentally. The proposed BSIDRA consists of a substrate integrated dielectric resonator (SIDR) fed by a substrate integrated waveguide with an exciting slot. Dual resonances of the SIDR and the exciting slot radiator are merged to expand the antenna bandwidth. To validate the proposed concept,...
In space borne high resolution SAR images, the long metal cable may scatter as a bright spot similar with corner reflector scattering. This paper analyzed the magnitude and phase features of the line scatters in X band SAR images. The magnitude and pixel size of the line scatters varied in time series images, while the scatterers' center also shifting in range and azimuth direction. The phase of each...
Bidirectional Reflectance Distribution Function (BRDF), Albedo, and Nadir BRDF Adjusted Reflectance (NBAR) products are being produced for the Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the Suomi-National Polar-orbiting Partnership (NPP) satellite in order to extend the MODerate resolution Imaging Spectroradiometer (MODIS) record for research and operational users. The VIIRS product...
The target feature is sensitive to the aspect angle of SAR observation, making the interpretation and target recognition of the SAR image difficult. The information acquired from a certain aspect angle is partial and incomplete, and the multi-aspect observations have the potential to improve the SAR performance in this aspect. Three topics of fine feature description of multi-aspect SAR observations...
In this paper, the HL7702 cells were cured with 4% paraformaldehyde for different time durations. The atomic force microscope (AFM) and atomic force acoustic microscope (AFAM) were used to observe the surface and subsurface properties of the cured cells. The structures of the cells were changed with the curing time including the cytoskeleton, the shape, the height and the roughness of the cells. The...
This paper presents a method for the quantitative imaging and analysis of SMCC-7721 cells using an atomic force acoustic microscope (AFAM). In this work, an AFAM was used to study the surface, intracellular structure and elasticity mapping of SMCC-7721 cells, and both topographic and acoustic images of the cells were obtained. In the experiment, the SMCC-7721 cells were treated with 4% paraformaldehyde...
Localization is a fundamental issue for many applications in wireless sensor networks. This paper proposes a better range-free algorithm based on DV-Hop, which increases localization accuracy without increasing hardware or communication costs. First, this algorithm utilizes average hop-size correction to reduce ranging errors. Second, the algorithm uses an improved equation solving method to reduce...
An improvement in the resonant microcantilever-based sensor's sensitivity is proposed by varying the microcantilever weight distribution. The relationship between the resonant frequency of different microcantilevers and their dimensions is investigated using the analytical method and finite element method. The principle to increase the resonant frequency drift when the target gas is absorbed by the...
This paper aims at extending the modulating functions method to design a non-asymptotic and robust pseudo-state estimator for a class of fractional order linear systems which can be transformed into the Brunovsky's observable canonical form of pseudo-state space representation with zero initial conditions. For this purpose, the former form is first expressed by a fractional order linear differential...
Existing joint models of deep Convolutional Neural Networks (CNNs) and Conditional Random Fields (CRFs) face two problems for object segmentation: 1) CNNs can hardly extract high level features; 2) fully connected layers of CNNs are lack of capability of dealing with structured multi-level features. To address these problems, we utilize a Structured Random Forests based border ownership detection...
In this letter, a dual-band differential CPW-fed MIMO antenna for Worldwide Interoperability for Microwave Access (WiMAX) application is proposed. The antenna has a square ring ground and a common patch which is shared by two pairs of differentially-fed ports. By arranging two pairs of differential ports orthogonally in the virtual ac ground of each other, the differential isolation can be infinite...
Telecommunication monitoring data requires the automation of data analysis workflows. A data mining tool provides data workflow management systems to process and perform analysis tasks. This paper presents an evaluation of two example data mining tools following the principles of design of experiment (DOE) to run forecasting and clustering workflows for telecom monitoring data. We conduct both quantitative...
A RRAM-based non-volatile flip-flop (NYFF) is designed to meet energy efficiency requirement for standby-power-critical applications in the deployment solution of IoT (Internet of Things). Adding only a pair of 1T1R cell into slave latch of a traditional FF can cut off the standby leakage at the cost of 4pJ write energy, and 20ps data retention time upon ideal power-on. The NVFF circuit is simulated...
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