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Asymptotic multistability and local S-asymptotic ω-periodicity for the nonautonomous fractional-order neural networks with impulses

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Science China(Information Sciences) 2021年第1期64卷 175-187页

作者： Yonggui kao Hui LI Department of Mathematics Harbin Institute of Technology at Weihai

This paper focuses on the investigation of asymptotic multistability and on local S-asymptoticω-periodicity for nonautonomous fractional-order neural networks(FONNs) with impulses. Several criteria on the existence, uniqueness, and invariant sets of nonautonomous FONNs with impulses are derived by constructing convergent sequences and comparison principles, respectively. In addition, using the Lyapunov direct method, some novel conditions of boundedness and local asymptotic stability of the FONNs discussed are obtained. Also, the sufficient conditions for local S-asymptotic ω-periodicities of the system are presented. Finally, a discussion using two examples verifies the validity of our findings, which imply that global asymptotic stability is a special case of asymptotic multistability.

关键词： fractional-order neural networks local S-asymptotic ω-periodicity asymptotic multistability impulse nonautonomous

Stability of Coupled Impulsive Markovian Jump Reaction-Diffusion Systems on Networks

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Journal of Systems Science & Complexity 2016年第5期29卷 1269-1280页

作者： LI Yanbo kao Yonggui School of Mathematical Sciences Guangxi Teachers Education University Department of Mathematics Harbin Institute of Technology (Weihai)

This paper is devoted to the investigation of stability for a class of coupled impulsive Markovian jump reaction-diffusion systems on networks(CIMJRDSNs). By using graph theory, a systematic method is provided to construct global Lyapunov functions for the CIMJRDSNs. Based on Lyapunov functions and stochastic analysis method, some novel stability principles associated with the topology property of the networks are established.

关键词： Coupled stochastic reaction-diffusion systems, impulsive, Markovian switching networks stability.

Applying a Step Approach Method in Solving the Multi-Frequency Radiation From a Complex Obstacle

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Computer Modeling in Engineering & Sciences 2016年第7期112卷 59-73页

作者： Jui-Hsiang kao Department of Systems Engineering and Naval Architecture National Taiwan Ocean UniversityKeelungTaiwanR.O.C

In this paper,a step approach method in the time domain is developed to calculate the radiated waves from an arbitrary obstacle pulsating with multiple *** computing scheme is based on the Boundary Integral Equation and derived in the time domain;thus,the time-harmonic Neumann boundary condition can be *** the present method,the values of the initial conditions are set to zero,and the approach process is carried forward in a loop from the first time step to the *** each time step,the radiated pressure on each element is *** several loops,the correct radiated pressures can be obtained.A sphere pulsating with a monopole frequency in an infinite acoustic domain is calculated *** result is compared with the analytical solution,and both of them are in good ***,a complex-shaped radiator is taken as the studied *** pulsating frequency of this case is multiple,and the waves propagate in half *** is shown that the present method can treat multiple-frequency pulsation well,even when the radiator is a complex shape,and a robust convergence can be attained quickly.

关键词： Step approach method Time domain Radiated waves Multiple frequencies Boundary integral equation Neumann boundary condition

Numerical Simulation of Co-Combustion of Pulverized Coal and Different Proportions of Refused Derived Fuel in TTF Precalciner

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Journal of Renewable Materials 2021年第7期9卷 1329-1343页

作者： Jiekun Zhu Hongtao kao College of Materials Science and Engineering Nanjing Tech UniversityNanjing211816China

Based on the theory of computational fluid dynamics(CFD),pulverized coal combustion alone,and the co-combustion of pulverized coal and refuse-derived fuel(RDF)in a Trinal-sprayed calciner(TTF)precalciner were *** results revealed that when coal was used as a single fuel,the velocity field in the precalciner had good symmetry,and formed three spray effects and multiple recirculation *** main combustion zone was distributed in the lower tertiary air and pulverized coal area,and the highest temperature reached up to 1,500 *** to the simulation results,the predicted decomposing rate of raw meal was 90.12%,which is in good agreement with the actual measured *** addition,with the increase in RDF content,the average temperature of the furnace,the decomposition rate of the raw meal,and the NO_(x) concentration all exhibited a downward *** the condition of ensuring the normal operation of the precalciner,blending with 20%RDF is the most reasonable strategy,and the NO_(x) emissions decreased by approximately 16%.

关键词： Numerical simulation TTF precalciner RDF co-combustion NO_(x)emission

Numerical Simulation of Sludge Combustion in TTF Precalciner

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Journal of Renewable Materials 2021年第4期9卷 671-693页

作者： Penghui Wang Hongtao kao College of Materials Science and Engineering Nanjing Tech UniversityNanjing211816China

The research method of computational fluid dynamics(CFD)is used to study the technology of burning sludge in cement *** simulation results show that the flow field in the TTF precalciner is stable,the spray effect is good,and no raw meal collapse *** special structure of the TTF(Trinal-sprayed)precalciner allows the pulverized coal and sludge to fully exchange heat with the flue gas and *** there is no sludge burning in the furnace,the decomposition rate can reach 92.1%,and the maximum temperature of the precalciner can reach 1600 *** the moisture content of the sludge is constant,as the amount of sludge increases,the overall furnace temperature shows a downward trend and the minimum temperature at the precalciner outlet can be reduced to 1080 *** phenomenon shows that sludge has a great influence on furnace *** order to ensure that the decomposition rate of the raw meal is not less than 85%,the decomposition rate of the raw meal under different conditions is *** was found that the sludge input can be about S-20%when the mositure content of the sludge is 50%.Moreover,when the water content of the sludge is 60%,the burning amount of sludge cannot be higher than S-20%,which ensures the normal decomposition of *** addition of sludge reduces the temperature in the precalciner and further inhibits the generation of thermal NO_(x).The reduction of CO content produced by incomplete combustion of pulverized coal indicates that CO suppresses the production of fuel-type NO_(x).The NO_(x) concentration at the gooseneck is as low as 522 mg/***,it was also found that when the sludge input is fixed,the NO_(x) concentration decreases with the moisture content of the sludge increasing,indirectly proving the inhibitory effect of H2O on NO_(x).

关键词： Sludge combustion numerical simulation TTF precalciner NO_(x)reduction

Numerical Simulation of Urea Based SNCR Process in a Trinal-Sprayed Precalciner

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Journal of Renewable Materials 2021年第2期9卷 269-294页

作者： Yu Liu Hongtao kao College of Materials Science and Engineering Nanjing Tech UniversityNanjing211816China

In order to study the combustion characteristics,NOx emission and NH3 slip in a new trinal-sprayed precalciner,the simulations of combustion and aqueous urea solution based selective non-catalytic reduction(SNCR)process were conducted by computational fluid dynamics in this precalciner,the effects of different injection heights,different injection flow rates and stratified injection under different flow rates on SNCR process were *** results showed that the flow field was symmetrically distributed in the precalciner,and the flue gas from the rotary kiln formed the recirculation region on both sides of the cone body,which increased the residence time of the solid *** temperature was mainly between 1100 K and 1250 K in the middle and upper column of the precalciner,which met the demand of the pulverized coal combustion and raw material *** concentration of NO at the outlet of the precalciner was 559 ppm,moreover,different injection heights and different injection flow rates had a strong influence on NOX removal efficiency and NH3 *** aqueous urea solution should be injected at SNCR-1 to prolong the residence time of NH3,and injection flow rate had an optimal flow rate but not the higher the *** the injection flow rate under stratified injection was 0.019 kg/s,which could play a better optimization role on NO removal efficiency on the basic of the injection flow *** consideration of cost effective,a stratified injection with an injection flow rate of 0.019 kg/s and an injection height of 20 m,25 m and 30 m was suggested as a compromise of a satisfactory NOx reduction rates and reasonable NH3 *** this condition,numerical simulation result showed that NOx concentration at the outlet of precalciner was 297.27 mg/Nm3 and NH3 slip was 4.67 mg/Nm3,meeting emission standard.

关键词： Trinal-sprayed precalciner selective non-catalytic reduction aqueous urea solution NOx reduction

Mindless Intelligence Method for Solving the Tower of Hanoi Problem

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Chinese Journal of Mechanical Engineering 2009年第2期22卷 159-168页

作者： TSAU Minhe kao Weiwen CHAng Albert Department of Mechanical Engineering Taiwan University of Science and Technology Taipei 10607 Taiwan China Department of Industrial Management Vanung University of Science and Technology Taipei 32061 Taiwan China

Over the past years, more and more attention has been paid to artificial life research. The main object of artificial life research is to explore how to control the environments in which the digital organisms imitating natural life, under complicated competition and evolutionary conditions, develop their own wisdom, which can then be used to solve the problems in the real world. While most of the current researches applied one or another artificial life method to solve real problems, the fundamental mechanism of the emerging process of artificial life is seldom addressed. The research works on genetic algorithms, although bearing fruitful results, could only be deemed as constituting a basic stage in the process of artificial life development. This study proposes a new method of employing artificial life, to complement the contents of the research of mindless intelligence, which is regarded as a bridge linking genetic algorithms to general artificial life. And two important concepts, key manipulating parameters and contribution function in its context, are proposed to expand the mindless intelligence applications, in order to pave the way for the optimal design of an artificial life method, in an attempt to fill the conceptual gap between genetic algorithms and artificial life, and consequently clarifying the artificial life mechanism. As a case study we applied these innovative methods to solve an open problem： the Tower of Hanoi, to attest to the feasibility of our approach, and we have achieved satisfactory results.

关键词： artificial life genetic algorithm artificial intelligence mindless intelligence tower of Hanoi problem key manipulating parameter

Generalized Artificial Life Structure for Time-dependent Problems

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Chinese Journal of Mechanical Engineering 2009年第3期22卷 317-324页

作者： TSAU Minhe kao Weiwen CHAng Albert Department of Mechanical Engineering Taiwan University of Science and Technology Department of Industrial Management Vanung University of Science and Technology

In recent years, more attention has been paid on artificial life researches. Artificial life（AL） is a research on regulating gene parameters of digital organisms under complicated problematic environments through natural selections and evolutions to achieve the final emergence of intelligence. Most recent studies focused on solving certain real problems by artificial life methods, yet without much address on the AL life basic mechanism. The real problems are often very complicated, and the proposed methods sometimes seem too simple to handle those problems. This study proposed a new approach in AL research, named ＂generalized artificial life structure（GALS）＂, in which the traditional ＂gene bits＂ in genetic algorithms is first replaced by ＂gene parameters＂, which could appear anywhere in GALS. A modeling procedure is taken to normalize the input data, and AL ＂tissue＂ is innovated to make AL more complex. GALS is anticipated to contribute significantly to the fitness of AL evolution. The formation of ＂tissue＂ begins with some different AL basic cells, and then tissue is produced by the casual selections of one or several of these cells. As a result, the gene parameters, represented by ＂tissues＂, could become highly diversified. This diversification should have obvious effects on improving gene fitness. This study took the innovative method of GALS in a stock forecasting problem under a carefully designed manipulating platform. And the researching results verify that the GALS is successful in improving the gene evolution fitness.

关键词： artificial life artificial intelligence generalized artificial life structure (GALS)

Preparation and characterization of LiAl_xCo_yNi_(1-x-y)O_2 particles

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Particuology 2008年第4期6卷 252-257页

作者： Chen-Feng kao, kao-Heng Liu Department of Chemical Engineering, Cheng Kung University (NCKU), Tainan 70101, Taiwan, China Department of Chemical Engineering Cheng Kung University (NCKU) Tainan 70101 Taiwan China

Lithium-aluminum-cobalt-nickel oxide LiAlxCoyNi1xyO2 particles, generally used as cathode of lithium battery, were prepared by chemical coprecipitation from an aqueous solution of LiOH, Al(NO3)3, Co(NO3)2 and Ni(NO3)2 with NH4OH. XRD, SEM and FTIR were used to examine the effect of nickel content on the product. FTIR patterns showed that increase in nickel content decreased the absorption strength of the peak of spinel structure of the product, attributed to the occupation by nickel in the aluminum sites. Particle size and electrical properties of the lithium-aluminum-cobalt-nickel oxide (abbreviated as LACNO) particles were also determined.

关键词： LiAl_xCo_yNi_(1-x-y)O_2 Chemical coprecipitation Particle size Electrical properties