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This paper proposes a novel simple adaptive and online approach to estimate the state of charge (SOC) in Lithium Ion (Li-Ion) batteries based on a new model parameter identification method. First, a novel discrete model for the Li-ion battery is developed. This model is the key step in the development of the proposed parameter estimation algorithm. The estimated parameters are used for on-line calculation...
Hybrid DC circuit breaker, a combination of disconnector and multiple power electronic devices, has gained popularity for its low-loss at normal operation and its quick and effective circuit breaking during fault protection. However, its bulkiness threatens to limit its application in multi-terminal DC system, where the terminal is usually connected to more than one transmission lines and hence the...
In this paper, a novel LLC resonant converter with parallel input and parallel output circuit topology is proposed to achieve the good performance of reduced switch count and medium power compared with conventional parallel half-bridge resonant converter. The proposed LLC resonant converter has two resonant circuits, two resonant circuits use the same power switches to transmit power so that the switch...
This paper presents an improved thermal equivalent circuit model which provides an accurate thermal and loss estimation for integrated power modules. Thermal analysis is a critical issue for power electronic systems, it estimates the thermal performance of power devices and enables a flexible converter design. Unlike the conventional thermal models, the modified analytical thermal model takes the...
Mobile service and wearable devices have become a new hotspot in recent year. People also pay more attention to the problem of e-health. Cardiovascular disease is a kind of serious disease that jeopardizes the health and life of human beings which has been widespread concern by academic and practice researchers. But the automated monitoring and prevention of heart disease, cardiovascular disease and...
Here we study the shape, size, and merging pattern of the area following the toll barrier, from the five aspects including the accident prevention, throughput, cost, service time and passing capacity. We build the corresponding model of the new single-in and double_out toll station to measure the optimal solution of the toll plaza on the basis of a series of methods such as the factor analysis, principal...
Due to its potential applications in optoelectric area, WS2/graphene heterojunction attracts much attention in past years. But until now, modulation of their working performance is still a big challenge for the researchers. In this work, WS2/graphene heterojunctions have been sucessfully fabricated on Si substrate. Moreover, their surface configuration were researched by STM and AFM techniques. Finally,...
Average-consensus filter problem is investigated for a mixed-order multi-agent system, which consists of first-order and second-order agents, and the proportional-integral consensus filter algorithms are proposed for the agents with different constant inputs. Based on generalized Nyquist stability criterion, sufficient convergence conditions are obtained for the multiagent system under a fixed, symmetric...
This paper proposes a fast and real-time background update mechanism for vehicle detection in urban city. The roads of urban city are relatively clean from the perspective of digital image which is helpful for developing a specialized fast algorithm of background update. However, frequent congestion in urban roads poses a great challenge on constructing a reliable real-time background model. In this...
We propose a flexible multi-frequency channel correlator upgrade for MUSER-I array. The upgrade correlator has a more flexible architecture to be extensible for signal receiving elements. It can process 1024 frequency channels in IF band and the correlation sensibility is improved by utilizing 4-bit quantization in pre-correlation as well. The enhanced multi-frequency channel processing capability...
MUSER (MingantU SpEctral Radioheliograph) is a solar-dedicated interferometric array that is located in Mingantu town, Inner Mongolia of China and carries out imaging spectroscopy of the Sun with high spatial resolution, high time resolution and high frequency resolution at a wide frequency range from 0.4–2GHz. It was renamed from CSRH (Chinese Spectral Radioheliograph) after its accomplishment. Some...
Interplanetary Scintillation (IPS) of compact radio sources at meter to centimeter wavelengths is a useful ground-based method to investigate solar wind. There are 3 technical solutions for IPS observation. At present, each running IPS dedicated telescope represents a solution accordingly. In recent future, a new IPS telescope is proposed to build in China. Therefore, we combined advantages of single...
In view of the rapid growth of digital library data, the data of different structures are increasing day by day. The traditional data processing model can not be qualified for the storage and management of massive heterogeneous data. A Hadoop-based digital library service system is designed and implemented for all the practical problems in the big data field. The system makes full use of the massive...
With the arrival of big data period, mass data storage is a hotspot topic in big data analysis with the expansion of information and variety of data structure. There is an urgent need for efficient storage and management of big data to provide realtime or near-realtime query for data analysis. In view of the rapid growth of spatial data, the data of different structures are increasing day by day....
The Mingantu Observing Staion of National Astronomcial Observatories, Chinese Academy of Sciences was officially established in 2008 in Zhengxiang Baiqi, Inner Mongolia of China, about 260 km distance northwest of Beijing. It was reformed by combining Solar Radio Research Group together in 2016. The Mingantu Spectral Radioheliograph (MUSER) is constructed and located there. The MUSER is divided into...
In a traditional process of software testing, an user have to buy servers and test tools to set up various test environment artificially, which causes high-cost, long test time and difficult test implements with limited resource. Cloud computing integrates a large number of physical resources into a pool and realizes the virtualization of various resources based on virtualization techniques. Users...
In this letter, a wideband printed loop-dipole antenna with magnetic-electric coupling is proposed. The proposed antenna consists of two coupled metallic split rings with slits on opposite sides and a parasitic metal strip. Two coupled split-rings can generate multiple operational modes such that multi-frequencies resonance can be formed. And in order to expand the bandwidth and improve the impedance...
This paper deals with the control of simple process models where multiple time-delays appear. These delays can be input, output or state delays. For the case of input/output time-delays, a general solution is retrieved from the literature. For state time-delays, the scalar case is considered and a pre-compensator is used to cancel the delay. The proposed algorithms are applied to the control of a...
This paper is concerned with the problem of stochastic stabilization and H∞ control for a class of continuous-time nonlinear Markovian jump systems (MJSs) described by Takagi-Sugeno (T-S) fuzzy models. Based on a mode-dependent fuzzy Lyapunov function and by introducing slack matrix variables, we propose a new less conservative sufficient condition for the mode-dependent fuzzy controller in terms...
Lanthanum hexaboride (LaB6) nanowires have attracted much attention due to their outstanding physical properties. In order to enhance the developments of LaB6 nanowires, it is essential to study the field emission (FE) properties of LaB6 nanowires in different environments. Here, we investigate the effect of oxygen (O2) on the FE behaviors of LaB6 nanowires. And it is found that the oxygen content...
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