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Grammian Determinant Solution and Pfaffianization for a (3+1)-Dimensional Soliton Equation

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Communications in Theoretical Physics 2009年第11期52卷 791-794页

作者： WU Jian-ping GENG xian-guo2 Institute of Electronic Technology Information Engineering University Zhengzhou 450004 China Department of Mathematics Zhengzhou University Zhengzhou 450052 China

Based on the Pfaffian derivative formulae,a Grammian determinant solution for a(3+1)-dimensionalsoliton equation is ***,the Pfaffianization procedure is applied for the equation to generate a newcoupled *** last,a Gra... 详细信息

关键词： (3+1)-dimensional soliton equation Grammian determinant solution Pfaffianization Gram-type Pfaffian solution

Application of pole-zero cancellation circuit in nuclear signal filtering and shaping algorithm

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Nuclear Science and Techniques 2021年第8期32卷 85-94页

作者： Huai-ping Wang Jian-Bin Zhou Xiao-ping Ouyang xian-guo Tuo Xu Hong Yi Liu Jie Yu You-xian Jin College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyNo.1 East 3 RoadErxian BridgeChenghua DistrictChengdu 610059China Northwestern Institute of Nuclear Technology Xi’an 710024China Engineering Research Center of Nuclear Technology Application(East China University of Technology) Ministry of EducationNanchang 330013China

In radiation measurement and digital nuclear spectrum systems,traditional nuclear signal processing circuits in nuclear electronics have been gradually replaced by digital algorithm modules with the application of highperformance programmable hardware logic devices(such as FPGA or DSP).Referring to the digital realization method of inverse RC integral circuit systems,the function of the pole-zero cancellation(PZC)circuit was analyzed,a new modified cascade equivalent model of PZC was established,and the time-domain digital PZC(DPZC)recursive algorithm was derived in detail in this *** parameters kIand k_(D)are included in the new algorithm,where kIshould match the exponential decay time constant of the input signal to realize the pole-zero compensation,while the decay time constant of the output signal can be changed with the adjustable parameter k_(D)(which is larger than the decay time constant of the input signal).Based on the new DPZC algorithm module,two trapezoidal(triangular)shaping filters were designed and *** amplitude–frequency characteristics of the output signal of the proposed trapezoidal shaping algorithm and the convolution trapezoidal shaping algorithm were compared,with fixed peaking *** results show that the trapezoidal shaping algorithm based on DPZC can better suppress high-frequency ***,based on the Na I(Tl)scintillator(u75 mm×75 mm)detector and^(137)Cs source,the effect of the k_(D)value on the energy resolution of the DPZC trapezoidal(triangular)shaping algorithm was *** experimental results show that,with an increase in k_(D),the energy resolution of the system improved and reached the maximum when k_(D)was greater than 10,and the optimal energy resolution of the system was 7.72%.

关键词： Pole-zero cancellation C–R inverse system Trapezoidal/triangular shaping Amplitude–frequency characteristics Energy resolution

Rietveld quantification of γ-C_2S conversion rate supported by synchrotron X-ray diffraction images

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第11期14卷 815-821页

作者： Pi-qi ZHAO xian-ping LIU Jian-guo WU Pei-ming WANG School of Materials Science and Engineering Tongji University Key Laboratory of Advanced Civil Engineering Materials (Tongji University) Ministry of Education

The pure γ-Ca2SiO4 （]t-C2S） phase was prepared at 1623 K of calcining temperature, 10 h of holding time and furnace cooling. The 13-C2S phase was obtained through γ-C2S conversion with the following calcination system which was adopted at 1473 K of calcining temperature, 1 h of holding time and then water-cooling. The conversion rate of γ-C2S was studied by the Rietveld quantitative laboratory X-ray powder diffraction supported by synchrotron X-ray diffraction images. The refinement results show that the final conversion rate of γ-C2S is higher than 92%. The absolute error of the γ-C2S conversion rate between two Rietveld refinements （sample with or without α-Al2O3） is 3.6%, which shows that the Rietveld quantitative X-ray diffraction analysis is an appropriate and accurate method to quantify the γ-C2S conversion rate.

关键词： β-C28 γ-C28 Rietveld quantification Synchrotron X-ray diffraction image

Variational learning for finite Beta-Liouville mixture models

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The Journal of China Universities of Posts and Telecommunications 2014年第2期21卷 98-103页

作者： LAI Yu-ping ZHOU Ya-jian ping Yuan guo Yu-cui YANG Yi-xian Information Security Center Beijing University of Posts and Telecommunications Department of Computer Science and Technology Xuchang University School of Science Beijing University of Posts and Telecommunications

In the article, an improved variational inference （VI） framework for learning finite Beta-Liouville mixture models （BLM） is proposed for proportional data classification and clustering. Within the VI framework, some non-linear approximation techniques are adopted to obtain the approximated variational object functions. Analytical solutions are obtained for the variational posterior distributions. Compared to the expectation maximization （EM） algorithm which is commonly used for learning mixture models, underfitting and overfitting events can be prevented. Furthermore, parameters and complexity of the mixture model （model order） can be estimated simultaneously. Experiment shows that both synthetic and real-world data sets are to demonstrate the feasibility and advantages of the proposed method.

关键词： variational inference model selection factorized approximation Beta-Liouville distribution mixing modeling

Construction of sustainable, colored and multifunctional protein silk fabric using biomass riboflavin sodium phosphate

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Frontiers of Chemical Science and Engineering 2023年第8期17卷 1131-1139页

作者： Wen-Jie Jin Yu Xin xian-Wei Cheng Jin-ping Guan guo-Qiang Chen Key Laboratory of Flame Retardancy Finishing of Textile Materials(CNTAC) College of Textile and Clothing EngineeringSoochow UniversitySuzhou 215123China

Riboflavin sodium phosphate has been confirmed as a promising biomass product derived from natural *** this paper,a novel method of dyeing and multifunctional modification of silk fabric by impregnation with riboflavin sodium phosphate was proposed,such that protein silk fabric can be endowed with bright yellow color and *** results of this paper confirmed that the pH and concentration of riboflavin sodium phosphate solution are critical factors for dyeing and multifunctional ***,the photochromic performance was one of the most distinctive features of the modified silk fabric,and the dyed silk fabric turned into fluorescent green from original yellow under 365 nm ultraviolet ***,the modified silk fabric exhibited good antibacterial properties with a high inhibition rate of 92%for Escherichia ***,the flame retardancy of silk fabric was significantly improved after *** damaged length of modified silk fabric with 40%owf riboflavin sodium phosphate was lower than 10.4 cm and passed the B1 *** revealed by the result of this paper,riboflavin sodium phosphate is sufficiently effective in serving as an eco-friendly multifunctional agent for strengthening the add-value of silk textiles.

关键词： biomass riboflavin sodium phosphate silk protein multifunctional modification flame retardant

Some issues in diagnostics of solar chromospheric magnetic fields with the Mg b_2 line

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Research in Astronomy and Astrophysics 2014年第2期14卷 193-206页

作者： xian-Yong Bai Yuan-Yong Deng Jiang-Tao Su guo-ping Wang Key Laboratory of Solar Activity National Astronomical ObservatoriesChinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Space Weather Chinese Academy of Sciences

Up to now, exact measurements of chromospheric magnetic fields have not been as successful as those done in the photosphere. We are currently engaging in diagnostics of chromospheric magnetic fields with the Mg b2 line by employing the Multi-Channel Solar Telescope at Huairou Solar Observing Station. Therefore, how to improve accuracy in the measurement is the main issue of our present study. To this end, we first study linear calibration coefficients for longitudinal and transverse components of chromospheric fields, which vary with wavelength, in the case of a weak field assumption. Then the polarization crosstalk introduced by instruments is analyzed in detail with two numerical simulation methods. Comparisons of the po- larization signals between cases with and without correction are presented. The result indicates that polarization accuracy is greatly improved after crosstalk correction.

关键词： Sun: chromospheric -- magnetic fields -- spectral profiles: radiative transfer

Coordination of Networked Nonlinear Multi-Agents Using a High-Order Fully Actuated Predictive Control Strategy

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IEEE/CAA Journal of Automatica Sinica 2022年第4期9卷 615-623页

作者： guo-ping Liu IEEE the Department of Electronic and Electrical Engineering Southern University of Science and Technology

This paper is concerned with the coordinative control problem of networked nonlinear multi-agents(NNM)with communication delays.A high-order fully actuated(HOFA)model is introduced to describe the nonlinear *** on this model,a HOFA predictive coordination method is proposed to compensate for the communication delays actively and achieve simultaneous stability and *** method largely simplifies the design of networked nonlinear multi-agents and makes the control performance be same for networked nonlinear multi-agents with and without communication *** analysis on the closed-loop systems derives the simultaneous stability and consensus criteria of networked nonlinear multiagents using the HOFA predictive coordination *** the presented way of designing HOFA predictive coordination controllers,a simulated example demonstrates the advantages of the proposed method.

关键词： method nonlinear coordination

Control Strategies for Digital Twin Systems

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 170-180页

作者： guo-ping Liu IEEE the Center for Control Science and Technology Southern University of Science and TechnologyShenzhen 518055China

With the continuous breakthrough in information technology and its integration into practical applications, industrial digital twins are expected to accelerate their development in the near future. This paper studies various control strategies for digital twin systems from the viewpoint of practical *** make full use of advantages of digital twins for control systems, an architecture of digital twin control systems, adaptive model tracking scheme, performance prediction scheme, performance retention scheme, and fault tolerant control scheme are proposed. Those schemes are detailed to deal with different issues on model tracking, performance prediction, performance retention, and fault tolerant control of digital twin systems. Also, the stability of digital twin control systems is analysed. The proposed schemes for digital twin control systems are illustrated by examples.

关键词： Digital twin control systems fault tolerant control model tracking performance prediction performance retention

Predictive Control of High-Order Fully Actuated Nonlinear Systems with Time-Varying Delays

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Journal of Systems Science & Complexity 2022年第2期35卷 457-470页

作者： LIU guo-ping Department of Electronic and Electrical Engineering Southern University of Science and TechnologyShenzhen 518055China

This paper investigates the control problem of high-order fully actuated nonlinear systems with time-varying delays in the discrete-time *** make the compensation for time-varying delays concise,active and universal,a novel nonlinear predictive control method is *** designed nonlinear predictive controller can achieve the same expected control performance as the nonlinear systems without *** the same time,the necessary and sufficient conditions for the stability of the closed-loop nonlinear predictive control systems are *** examples show that the proposed nonlinear predictive controller design method can completely compensate for the time-varying delays of nonlinear systems.

关键词： High-order fully actuated control systems nonlinear systems predictive control timevarying delays