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Just-in-time learning based integrated MPC-ILC control for batch processes

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Chinese Journal of Chemical Engineering 2018年第8期26卷 1713-1720页

作者： Li jia Wendan Tan Shanghai Key Laboratory of Power Station Automation Technology Department of Automation College of Mechatronics Engineering and Automation Shanghai University

Considering the two-dimension(2 D) characteristic and the unknown optimal trajectory problem of the batch processes, an integrated model predictive control-iterative learning control(MPC-ILC) for batch processes is proposed in this paper. Firstly, the batch-axis information and time-axis information are combined into one quadratic performance index. It implies the integration of ILC and MPC algorithm idea, which leads to superior tracking performance and better robustness against disturbance and uncertainty. To address the problem of the unknown optimal trajectory, both time-varying prediction horizon and end product quality control are employed. Moreover, an integrated 2 D just-in-time learning(JITL) model is used to improve the predictive accuracy. Furthermore, rigorous description and proof are presented to prove the convergence and tracking performance of the proposed MPC-ILC strategy. The simulation results show the effectiveness of the proposed method.

关键词： Model predictive control Batch process Just-in-time learning (JITL) model

Track Prediction of Typhoon Neoguri 2008

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Communications in Theoretical Physics 2009年第2期51卷 363-366页

作者： jia Man Department of Physics Shanghai Jiao Tong University Shanghai 200240 China

In this paper, the prediction of the track for No.1 tropical cyclone, Neoguri, is concretely provided by using a special solution to （2-1）-dimensional Euler Equation.

关键词： tropical cyclone Euler equation the induced flow

Numerical Study on Reduction of NO_x and Unburned Carbon in Micronized Coal Reburning

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Journal of Thermal Science 2008年第3期17卷 267-274页

作者： Mingshu Bi Yanyan jia School of Chemical Engineering Dalian University of Technology 158 Zhongshan Road Dalian 116012 China

Three dimensional numerical simulation of bituminous coal reburning in a full-scale tangentially fired boiler was conducted with CFD method to study the effects of reburn zone length, the height of reburn nozzles, the stoichiometric ratio in reburn zone, the reburn fuel fraction and the reburn coal fineness on NOx reduction efficiency and unburned carbon in fly ash. The results indicate that the NOx reduction efficiency reaches the largest value when the relative height of reburn nozzles is about 0.21 and the stoichiometric ratio is between 0.8 and 0.9 in reburn zone; NOx reduction efficiency increases with reburn zone length, reburn fuel fraction and the decrease of reburn coal particle size; the smaller the coal particle size is, the better the burnout performance of coal is.

关键词： Micronized coal reburning NOx reduction unburned carbon numerical simulation full-scale boiler

Optimization of hydrogen networks with multiple impurities and impurity removal

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Chinese Journal of Chemical Engineering 2016年第9期24卷 1236-1242页

作者： Xuexue jia Guilian Liu School of Chemical Engineering and Technology Xi'an Jiaotong University

To explore the effect of removing different impurities to hydrogen networks, an MINLP model is proposed with all matching possibilities and the trade-off between operation cost and capital cost is considered. Furthermore,the impurity remover, hydrogen distribution, compressor and pipe setting are included in the model. Based on this model, the impurity and source(s) that are in higher priority for impurity removal, the optimal targeted concentration, and the hydrogen network with the minimum annual cost can be identified. The efficiency of the proposed model is verified by a case study.

关键词： Impurity removal MINLP model Optimization Multiple impurities Hydrogen network

Controllable Optical Switch in a One-Dimensional Resonator Waveguide Coupled to a Whispering-Gallery Resonator

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Chinese Physics Letters 2011年第10期28卷 112-115页

作者： LANG jia-Hong School of Electrical Engineering&Information Anhui University of TechnologyMaanshan 243002

Single photon transport properties in a one-dimensional array of coupled microcavities waveguide coupled to a whispering-gallery resonator interacting with aΛ-type system are theoretically *** calculations reveal that the transport properties of single photons with arbitrary energy can be controlled by varying the Rabi frequency and detuning the control optical *** phenomenon can be used for controllable optical switching.

关键词： waveguide tuning resonator

Rational design of bimetallic catalysts for electrochemical CO_(2)reduction reaction:A review

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Science China Chemistry 2023年第5期66卷 1288-1317页

作者： Minhan Li jia-Nan Zhang College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

The electrochemical CO_(2)reduction reaction(eCO_(2)RR)is a compelling approach to convert CO_(2)into high-value fuels and chemicals using renewable *** rational design of catalysts is of great importance for achieving outstanding performance of this ***-based catalysts have been drawing enormous attention in eCO_(2)RR due to their excellent catalytic performance and flexible *** the pursuit of overcoming the inherent disadvantages of monometallic catalysts and achieving breakthroughs in the catalytic performance,bimetallic strategy has been receiving extensive concerns and achieving remarkable results over *** this review,we attempt to give a comprehensive review on the bimetallic catalysts that are used for eCO_(2)*** effects in bimetallic catalysts that contribute to the enhanced eCO_(2)RR performance are first analyzed,demonstrating the superiority of bimetallic ***,the structural design of bimetallic catalysts is discussed as it plays a key role in eCO_(2)***,the current advances and rules of selectivity of bimetallic catalysts in eCO_(2)RR are summarized based on the selectivity *** reviewing efforts devoted in this field,this review is believed to present a timely overview of the progress of bimetallic eCO_(2)RR catalysts and to offer potential future directions in the aim of developing highly efficient catalysts for eCO_(2)RR.

关键词： electrochemical CO_(2)reduction bimetallic catalyst electronic effect tandem effect structural design

Aromaticity of Heterofullerenes C18BxNy （x＋y=2） and Their Molecular lons

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Chinese Journal of Chemical Physics 2008年第2期21卷 118-122页

作者： jia-li Chen Ablikim Kerim College of Chemistry and Chemical Engineering Xinjiang University Urumqi 830045 China

The aromaticity of all possible substituted fullerene isomers of C18N2, C18B2, C18BN, and their molecular ions which originate from the C20 （Ih） cage were studied by the topological resonance energy （TRE） and the percentage topological resonance energy methods. The relationship between the aromaticity of C18BxNy isomers and the sites where the heteroatoms dope at the C20 （Ih） cage is discussed. Calculation results show that at the neutral and cationic states all the isomers are predicted to be antiaromatic with negative TREs, but their polyvalent anions are predicted to be aromatic with positive TREs. The most stable isomer is formed by heteroatom doping at the 1,11-sites in C18N2. C18B2, and C18BN. Heterofullerenes are more aromatic than C20. The stability order in the neutral states is C18N2〉C18BN〉C18B2〉C20. The stability order in closed-shell is C18B2^8- 〉C20^6- 〉C18BN^6- 〉C18N2^4-. This predicts theoretically that their polyvalent anions have high aromaticity.

关键词： C18N2, C18B2, C18BN, Aromaticity Topological resonance energy

Hygrothermal effect on high-velocity impact resistance of woven composites

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Defence Technology（防务技术） 2022年第5期18卷 823-833页

作者： Xiao-chen Yang Nan jia School of Urban Construction Eastern Liaoning UniversityWenhua 325Dandong118003China College of Safety Science and Engineering Liaoning Technical UniversityFuxin123000China China Coal Technology&Engineering Group Shenyang Research Institute Fushun113122China State Key Laboratory of Coal Mine Safety Technology Fushun113122China

The woven glass fiber reinforced composites(GFRP)subjected to high-speed impact is investigated to identify the hygrothermal aging effect on the impact *** the hygrothermal aged and unaged glass/epoxy laminates are subjected to different impact velocities,which is confirmed as a sensitive factor for the failure modes and *** results show the hygrothermal aging effect decreases the ballistic limit by 14.9%,but the influence on ballistic performance is limited within the impact velocity closed to the ballistic *** failure modes and energy dissipation mechanisms are confirmed to be slightly influenced by the hygrothermal aging *** hygrothermal aging effect induced localization of structural deformation and degradation of mechanical properties are the main reasons for the composite undergoing the same failure modes at smaller impact *** on the energy absorption mechanisms,analytical expressions predict the ballistic limit and energy absorption to reasonable accuracy,the underestimated total energy absorption results in a relatively poor agreement between the measured and predicted energy absorption efficiency.

关键词： Hygrothermal aging effect Woven glass/epoxy composite Impact resistance Dynamic failure Energy absorption

Insulin resistance and the metabolism of branched-chain amino acids

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Frontiers of Medicine 2013年第1期7卷 53-59页

作者： Jingyi Lu Guoxiang Xie Weiping jia Wei jia Shanghai Diabetes Institute Department of Endocrinology and MetabolismShanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai Key Laboratory of Diabetes MellitusShanghai Clinical Center for DiabetesShanghai 200233China Center for Translational Medicine Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233China Center for Translational Biomedical Research University of North Carolina at GreensboroNorth Carolina Research CampusKannapolisNC 28081USA

Insulin resistance(IR)is a key pathological feature of metabolic syndrome and subsequently causes serious health problems with an increased risk of several common metabolic *** related metabolic disturbance is not restricted to carbohydrates but impacts global metabolic ***-chain amino acids(BCAAs),namely valine,leucine and isoleucine,are among the nine essential amino acids,accounting for 35%of the essential amino acids in muscle proteins and 40%of the preformed amino acids required by *** BCAAs are particularly responsive to the inhibitory insulin action on amino acid release by skeletal muscle and their metabolism is profoundly altered in insulin resistant conditions and/or insulin *** increased circulating BCAA concentration in insulin resistant conditions has been noted for many years and BCAAs have been reported to be involved in the regulation of glucose homeostasis and body weight,it is only recently that BCAAs are found to be closely associated with *** review will focus on the recent findings on BCAAs from both epidemic and mechanistic studies.

关键词： branched-chain amino acids leucine isoleucine valine insulin resistance