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This study estimates the underwater structure acoustic radiation areas, mainly in the following aspects: analytical methods, boundary element and finite element, etc. This approach is a significant for mastery and understanding of the underwater structure vibration and radiation mechanism, calculations, theoretical estimates and acoustic design. From the engineering point of view, these algorithms...
In the biomedicine domain, a large number of papers are published every day, which is crucial to search for the relevant answers for the user's query. However, documents are not exactly what the users want. Instead, snippets, small segments from the documents, are more proper to meet the requirement of the users. Hence, this paper proposes a biomedical snippet retrieval framework to exactly locate...
This paper presents a study of the influences of DBC metal trace layout on the reliability of the high power IGBT module. The research is conducted on a seven-layer IGBT package model using finite element analysis simulation. A parametric study is carried out at different temperatures to simulate the thermal-cycling scenario. It shows in simulation that both total deformation and thermal stress are...
Industrial sectors have resulted in a large amount of pollution. Environmental degradation problem requires more indepth research on relationships between different sectors' economic output and pollutant emissions. This paper analyzes the relationship between industrial economy and ecology. On the basis of it, the driving factors of industrial sectors' pollution emissions are analyzed. Firstly, decoupling...
The rapid deployment of wind power has made grid integration and operational issues focal points in industry discussions and research. Compliance with grid connection standards for wind power plants (WPP) is crucial to ensuring the safe and stable operation of the electric power grid. The standards for grid-connected WPPs in China and the United States are compared in this paper to facilitate further...
0.91Pb(Zn1/3Nb2/3)O3-0.09 PbTiO3 (PZN-9%PT) single crystal was grown by flux Bridgman method. The crystal was oriented and cut into several plates. The polished plate looks pale yellow with 50% transmittance. Strip-like and finger-like domains were observed using a polarized light microscopy. The evaluation of domains were observed using a high temperature metallurgical microscope and the results...
Lead potassium niobate (Pb2KNb5015, PKN) single crystal with tungsten bronze has been successfully grown by Bridgman method through spontaneous nucleation. Under the optimized growth conditions, the crystal was transparent, cracks free and inclusions free. The mechanical property was measured through the Vickers microhardness technique. The result showed that the relationship between the Vickers'...
This paper presents a real-time system that can monitor an infant's respiration and detect apnea when it occurs. For infants, bedside monitoring of respiratory signals using noncontact sensors is desirable at the hospital and for in-home care. Traditional approach employs acoustic sensors which can hardly detect infant breathing due to low SNR. In this paper, a novel method is introduced by using...
Since preserving data locality is very important in MapReduce frameworks, the placement of jobs' input data becomes critical for MapReduce job performance. However, existing data placement strategies applied in MapReduce based file systems lack the efficient control of data storage. Some input data of jobs may concentrate in a few nodes, making slots contention on those nodes more aggressive and thereby...
Antennas radiation on electrically large objects is often encountered in computational electromagnetics. In this paper, we present an approximation strategy for the line integral reduction of arbitrary far-field source excitation. By approximating the arbitrary far-field source as different vector point sources for each sub-segment on the contour of the PO integral surface, the PO scattered field...
The terahertz spectra of ZIF-8 and ZIF-90 were acquired with terahertz time-domain spectroscopy (THz-TDS). Ab initio quantum mechanical calculations yield in spectra that match well with the experimental results and indicate that swing motions in these ZIFs may lie within the terahertz region. Variable temperature THz-TDS measurements on ZIF-90 suggest that the technique is sensitive to host-guest...
The vertical axis wind turbine has advantages on the ordinary areas, which lead to a fast development in recent years. But its wind turbine has various forms and the flow field has complex environment, so the power generation law is not easy to control and the performance of wind turbines usually is not conducive to further study. In order to solve this problem, a new method is proposed, which simulates...
The optimal filtering problem is addressed for multi-rate systems with one-step auto-correlated noises. The state is updated at the highest sampling rate and the sensor has a lower sampling rate. System noise and measurement noise are one-step auto-correlated, respectively. An optimal filter in the linear minimum variance sense is proposed via an innovation analysis approach. A simulation example...
With the development of the Internet of Things, data islands and information redundancy which caused by massive heterogeneous data has become a challenge of many commercial applications and scientific research hot spots. First, we proposed and designed a MapReduce data integration and data fusion architecture, then, we established a stable information processing environment and a unified information...
In this paper, we propose a compressive tracking method via appearance model based on structural local patchs and improved Haar-like feature. In contrast to previous compressive tracking only considering the holistic representation, an object can be represented by local image patches with spatial layout in an object. This representation takes advantage of both partial information and spatial information...
Since 3D video has the potential to provide stronger immersive perception, evaluating the quality of 3D video becomes an important subject. This paper mainly studies the subjective quality assessment of 3D video of two views compressed by the state-of-the-art standard H.264/MVC in 3DTV system. Our goal is to obtain available opinion scores which can be applied in the research of objective quality...
This article mainly deals with the control and stability problems of networked Hammerstein with nonlinear input. A novel predictive controller design method is proposed to offset the effect of network delay and data dropout. The controller gain which depends on the time delay of the feedback channel is time-variant. Since we assume that the state is not measurable, the control signal is based on the...
Traffic sign recognition (TSR) is an essential research issue in the design of driving support system and smart vehicles. In this paper, we propose a permutation-based image feature to describe traffic signs, which has an inherent advantage of illumination invariance and fast implementation. Our proposed feature LIPID (local image permutation interval descriptor) employs interval division and zone...
A class of information systems composed of backbone networks and access networks is very popular. According to the complexity and organization forms of the class of information systems, two evolution formation mechanisms of the systems are constructed based on complex network theory. One of the mechanisms uses pre-planning and random access strategies, and the other uses pre-planning and preferential...
Image representation through local descriptors is the basis of numerous computer vision applications. In the past decade, many local image descriptors such as SIFT and SURF have been proposed, yet algorithms requiring low memory and computation complexity are still preferred. Binary descriptors such as BRIEF have been suggested to satisfy this demand, showing a comparable performance but much faster...
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