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This paper proposes a design method for adaptive non-fragile synchronization of the Lur'e differential inclusion system. Firstly, the master system and the slave system are presented under some assumptions. Then, based on the output, the adaptive non-fragile controller is designed to make the error system asymptotically stable. Finally, the rotor system is simulated to show the effectiveness of the...
The hybrid centralized-distributed (HCD) thermoelectric generator (TEG) system can solve the unmatched maximum power point (MPP) between the series-connected TEG modules and achieve the maximum efficiency of power generation system. This paper proposes a distributed maximum power point tracking (MPPT) used in HCD TEG. By controlling the output currents of the TEG modules, the input currents of the...
This research introduces an improved k-means algorithm which combines hierarchical method with k-means method and the application in the evaluation of air quality levels. In present, evaluation of air quality relies on a tedious index computing based on a formula. A comprehensive analysis on single pollutant cannot be seen. The new clustering method gives more proper initial points calculated by hierarchical...
The gate for FinFET structure is graved into a 3D architecture just as a fin fork so that we can control device on/off through the surfaces of its top and two sides. Such design can greatly improve the controllability of circuit and reduce leakage and shorten gate length. Although FinFET has so many advantages, such as lower power, smaller size and etc., it brings big challenges to process, especially...
The issue of PM2.5 is becoming a popular atmospheric research hotpot recently. This particular paper evaluates the era reasons as well as influencing factors associated with PM2.5 based on the information associated with PM2.5 in Xing Tai (2014. 01. 01 - 2014. 04. 26), and builds the actual era as well as evolution mode of PM2.5 in Xing Tai by utilizing evolutionary algorithms formula and BP neuron...
This paper focuses on the modeling of Dual Active Bridge (DAB) DC-DC converter. Single-HB modulation has been studied in many papers, but no modeling work about this has been done. A multifrequency average model of DAB with single-HB PWM modulation is proposed in this paper. The proposed average model uses the dc, first and third coefficients in the Fourier series of transformer current as the state...
This paper proposes a new eddy current testing sensor composed of three planar fan-shaped circumferential gradient winding spiral coils. We study the crack detection principle by using the ECT sensor. The experiment of crack detection is set up and a series of samples machined with a slot at different size are detected by using the ECT sensor. Finally the quantitative estimations of crack width, depth...
This paper proposes the experimental study of a novel method of Backstepping Active Disturbance Rejection Controller of helicopter, which estimates and compensates the environmental disturbances and nonlinear aerodynamic forces in real time with little reliance on accurate system model. A reduced-order controller is designed and applied in flight tests. The attitude tracking and disturbance rejection...
This paper proposes a novel wind gust rejection controller for a model helicopter with uncertain parameters. A hybrid of backstepping and active disturbance rejection controller is designed to achieve attitude tracking. The analysis and inclusion of the nature of wind gust disturbances and rotor dynamics yield more practical and reliable disturbance observation. The disturbances are eliminated to...
Fast Z-pinch has produced the most powerful x-ray radiation source in laboratory plasmas and also shows the possibility to drive inertial confinement fusion (ICF). The Z-pinch researches at the Institute of Applied Physics and Computational Mathematics are presented in this paper. The wire array Z-pinch process has three phases: wire plasma formation and wire-array ablation, implosion and the MRT...
3-D Real-time Measurement System of seam outline based on Moiré Projection is proposed and designed. The system is composed of LD, grating, CCD, video A/D, FPGA, DSP and an output interface. The principle and hardware makeup of high-speed and real-time image processing circuit based on a Digital Signal Processor (DSP) and a Field Programmable Gate Array(FPGA) are introduced. Noise generation mechanism...
Experimental results show that a significant fraction of current will be carried by the ablated plasmas and the current flow through the precursor column strongly depends on the inter-wire gap1. It has been found that the ablation rate of wire core is axially non-uniform. When gaps appear in the wire cores, the plasmas prefilled inside the arrays begins to implode. The ablation dynamics determine...
The teaching and learning processes carried out daily in classrooms is crucial as well as challenge to accomplish the task of Excellent Engineers Training Program proposed by CME. In accordance with the overall requirements of the Program, the paper analyzes the effect of active and cooperative learning methodologies implemented in computer engineering educational courses of the department of Computer...
This paper proposes a new algorithm of image quality assessment which is based on the regional weighted comentropy. Because the structural similarity (SSIM) is deficient in the quality assessment of distorted images which are caused by noise and compression. To solve the problems, and considering the different interest rates of human vision to the different parts of an image, we put the regional weighted...
Aiming at problem of “knowledge is flood in the data ocean”, the method of knowledge acquisition based on data warehouse is studied in this paper. The structure of data warehouse is introduced firstly. Then the study pays attention on the designing and building a data warehouse. Data warehouse offers a good platform for OLAP and Data Mining. Some meaningful information can be acquired from data warehouse...
Traffic management becomes very important in our society, especially trailer traffic light with camera is used in the emergency traffic management situations. The paper discusses different compression method, and proposes a corresponding multi-layer coding for the video over wireless system. By comparing the experiment results, we explore the solutions as how to build a complete emergency traffic...
Integrating entrepreneurship education and activities in computing curricula can have a significant effect on the creativity, innovativeness, leadership and entrepreneurial intentions of computing undergraduates. The paper examines the current status of professional computing education for undergraduate majors in regional universities of China. We describe our modus operandi in integrating entrepreneurial...
We proposed an effective and efficiency anti-collusion fingerprint scheme based on inner code with orthogonal fingerprint in tandem and outer code with LDPC code that can not only have a good collusion-free performance in the fingerprint system but also have good error correct performance and can resist many other attacks unconsciously such as noise, which protected distributor's copyright and data...
γ-aminobutyric acid, which can improve the memory function, was founded in the various agricultural products. Developing functional food which contains rich γ-aminobutyric acid can provide an important resource for exploitation of agricultural products. Stabilized system paper chromatography, γ-aminobutyric acid contents in mulberry leaves and brown rice were studied in this article. The result showed...
This paper identifies the determinants which affect the environmental disclosure of company in China from a comprehensive perspective of public pressure and stakeholder management. Environmental disclosure data are collected from the annual reports of year 2008 which includes 200 firms from 21 industries. Both quantity assessment and quality assessment are employed to measure the level of environmental...
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