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According to the statistics of power utility, a great number of large transformers and shunt reactors failed due to the corrosive sulfur in the insulating mineral oil. The issue takes places because the corrosive sulfur reacts with copper conductors and silver contacts, resulting in the formation of metal sulfides which can contaminate the insulating paper. In order to study quantitative characterization...
As a distributed parameter system, traffic flow model of freeway traffic is determined by the traffic state on-road and boundary flows form on-ramp or off-ramp sections. The existing studies for traffic estimation mainly focus on the traffic parameter, namely density (or vehicles) of mainline traffic. In this paper, Kalman filtering for simultaneous traffic counts and off-ramp flow estimation is proposed...
In order to evaluate the management innovation capabilities of small and medium-sized high-tech enterprises in Shanghai, a questionnaire of management innovation capabilities evaluation is used in the paper. The study is based on 26 questionnaires collected from those high-tech companies. Analysis results show that the promotion of enterprise management innovation capabilities relied on a series of...
The wellbore dynamic pressure waves are produced in the perforation liquid after the shaped charges are initiated and then fiercely strike the gunstring, packer, casing and artificial bottom. The impact and damage effect only depend on the amplitude and holding time of dynamic pressures. This paper discusses the simplification of perforators' explosion with gun in the oil well. On the basis of simplification...
Nuclear factor kappa B (NF-κB) and p38 mitogen-activated protein kinase (p38 MAPK) are intimately related to skeletal muscle abnormalities. Since that, an interest has been found to investigate their functions in skeletal muscle development. Skeletal muscle development is a very complicated process involving cell differentiation, apoptosis, protein synthesis and degradation. Previous studies indicated...
We present the design and simulation of a dielectric planar antenna for semiconductor quantum dot single photon sources. Using both Finite-Difference Time Domain (FDTD) and analytical modelling, we investigate the influence of the geometric parameters of the planar antenna on the far field distribution and collection efficiency of the quantum dot emission. FDTD simulation results show good agreement...
In this paper, we present a modified self-training semi-supervised SVM algorithm. In order to demonstate its validity and effectiveness, we carry out some experimentswhich prove that our method is better than the former algorithm. Using our modified self-training semi-supervised SVM algorithm, we can save much time for lableling the unlabelled data.
In the work, an example-based method of touching string segmentation is proposed. Using Markov random field, the candidate patches based on the compatibility of the neighbour patches are selected. The outputs of the MRF after the iterative belief propagation form a segmentation probability map. The cut position is extracted from the map. Experiment results are presented and demonstrate the effectiveness...
A silicon birefringence device for performing vector transmission spectroscopy on polar solvent at terahertz frequencies is presented. The device enables direct measurement of the complex dielectric function of isopropyl alcohol in water and can differentiate the various concentrations.
Research and development activity is a vital strategy for enterprises in market competition. Researches concerning R&D are mainly focusing on enterprises' cooperative R&D contemporarily, which lacks of systematic study on enterprises' R&D strategies. This article is based on related researches, using Duopoly Market Model to analyze the economic mechanism of enterprises' three different...
Efficient speaker segmentation and clustering method based on the improved spectral clustering is proposed in this paper. Traditional speaker segmentation and clustering is performed by the hierarchical clustering algorithms with Bayesian information criterion (BIC) metric and cross likelihood ratio (CLR) metric after the speakers are segmented. Since this method has high computational complexity...
This paper proposes a new feature descriptor named as Local Primitive Code (LPC), which exhibits impressively discriminative capability on various face datasets. Essentially, LPC descriptors are somewhat like filter banks of Gaussian derivatives to capture multi-scale and multi-orientation image local textures but meanwhile enables faster feature extraction. It employs a framework composed of two...
No matter the irregular sudden bursting high-intensity soil erosion and water loss crisis incidents, or the regular continuing cumulative soil erosion and water loss crisis incidents, may make great negative impact and threat to both people's production and their living, even to their lives. Compiling and enacting emergency response plan of soil erosion and water loss crisis incident at all levels...
In order to improve the generalization performance of support vector machine (SVM), a support vector machine ensembling method based on independent component analysis (ICA) and fuzzy kernel clustering (FKC) was proposed. The ICA emphasizes the independence between the data characteristics and can effectively obtain a series of independent features, the performance of single SVM can be improved when...
In automatic transmission control, we need intervene engine torque control through TCU. In this paper, its necessity, basic mechanism, main condition will be deeply discussed as well as the key issues that need attention in the implementation. The issues that torque distribution for hybrid vehicle automatic transmission control are also discussed.
In this paper, a compact diode array model for Phase Change Memory (PCM) application is presented. From the diode array structure and numerical simulation result, a quasi-physical compact model is proposed by combining the classical diode equation and simplified bipolar device formulation. This model results in accurate calculation of different leakage current components with parameter setting. Furthermore,...
The subband current is evaluated by solving the non-equilibrium Green's function (NEGF) self-consistently with Poisson's equation for the double-gate MOSFETs with different channel lengths and thicknesses. The characteristics of subband current ratio and the details of subband number M are simulated, and the results show that the characteristics of current are determined by the first subband when...
Wireless sensor networks are composed of energy-constrained nodes. Therefore, it is crucial to design routing algorithms that optimize the energy usage of nodes. Aimed at maximizing the network lifetime, we introduced an optimal routing algorithm based on the max-min model. In this algorithm, the data transmission matrix is defined and the relaying node selection mechanism is designed to avoid possible...
Recently, structured P2P (Peer-to-Peer) system has become more and more popular. However, P2P systems' large scale and high dynamics have brought a great challenge to data availability and accessing performance. Redundancy techniques are used to solve these problems. However, in structured P2P systems, due to the consistent hash, the overlay network could not match underlying physical network well...
Terahertz (THZ) detection by field effect transistors (FETs) has been paid great attention in recent years. This paper outlined the numerical study of terahertz radiation detection by FETs in our group, including the fundamental THz detection model, detection model with two sources, heterodyne detection model and optical beating model. These study results demonstrated the potential application of...
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