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Research on Online Education Consumer Choice Behavior Path Based on Informatization

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China Communications 2021年第10期18卷 233-252页

作者： Yongrui Su ling zhao School of Economics and Management Beijing University of Posts and TelecommunicationsBeijing 100876China School of Marxism Beijing University of Posts and TelecommunicationsBeijing 100876China

The application of information and communications technology(ICT)in the education industry is becoming more and more extensive,and online education realized through ICT is developing in full *** influence of ICT on online education consumer's choice behavior is the core issue of online education industry development *** research on the interactive path and methods of information and online education consumer choice behavior is worth exploring and *** study introduces the word-of-mouth factor as a new research variable under the framework of the Rational Choice Theory model(RCT)and the structural equation method to conduct empirical research and theoretical analysis to verify the validity of the hypothesis and *** fifthGeneration mobile communication system(5 G)analyses the factors affecting online education consumer behavior choices based on the premise of *** on the path between ICT and choice behavior provides new ideas for online education consumer choice behavior research and ICT and content and provides a new *** article is a cross-disciplinary research content in theory,and its innovation opens up a new path for the management of ICT *** research results have innovative significance and value at both the theoretical and practical levels.

关键词： information and communications technology(ICT) consumer choice behavior rational choice theory the fifth-Generation mobile communication system(5G) online education

Delay-dependent robust control for uncertain stochastic systems with Markovian switching and multiple delays

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Journal of Systems Engineering and Electronics 2010年第2期21卷 287-295页

作者： Xudong zhao Mingxiang ling Qingshuang Zeng Space Control and Inertial Technology Institute Harbin Institute of Technology Harbin 150001 ER. China

The exponential stability in mean square and stabiliza- tion problems for It＆ stochastic switched systems with multiple time-delays are investigated. The system possesses the norm- bounded uncertainties and Markovian jumping parameters. By using an effective descriptor model transformation of the system and applying Ito＇s differential formula and Moon＇s inequality for bounding cross terms, a new delay-dependent sufficient condi- tion is derived in terms of linear matrix inequalities, and its states feedback controller is designed. Numerical examples are given to illustrate the efficiency and less conservation of the results.

关键词： stochastic systems Markovian jump time-delays lin- ear matrix inequalities.

Numerical simulation of micromixing effect on the reactive flow in a co-rotating twin screw extruder

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Chinese Journal of Chemical Engineering 2016年第9期24卷 1135-1146页

作者： Hao Tang Yuan Zong ling zhao State Key Laboratory of Chemical Engineering East China University of Science and Technology

To control the multicomponent reactions in extrusion, reactive-mixing flow in a co-rotating twin screw extruder was numerically studied in the present paper. Effects of initial species distribution, rotating speed and flow rate on a competitive-parallel reaction were investigated and the relationship between mixing and reactions was discussed from the view of chemical reaction engineering. The simulation results show the studied operational parameters, which determine residence time distribution, earliness of mixing and segregation degree of reactive-mixing flows, affect the local species concentration and reaction time and hence have significant influences on the reaction extent. Orthogonal test was adopted to clarify the significance of operational *** analysis shows that initial species distribution and flow rate are the most important factors in the control of reaction extent, and effect of rotating speed is conditional depending on the micro-mixing status of the fluid.

关键词： Multicomponent reaction Mixing Numerical simulation Extrusion

High-efficiency calculation method for watershed rainfallrunoff routing using one-dimensional dynamic wave equations

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Journal of Mountain Science 2017年第10期14卷 2097-2105页

作者： LI Jun GUO Xiao-jun zhao ling-ling Key Laboratory of Mountain Surface Process and Hazards/Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China Guangzhou Institute of Geography Guangdong Academy of Sciences Guangzhou 510070 China

Efficiency in solving the Saint-Venant equations for watershed rainfall-runoff routing is important in flood hydrology. This paper presents a high-efficiency numerical solution of one-dimensional dynamic wave equations(HEDWE) for watershed rainfall-runoff routing, in which the full momentum equation is written as a quadratic equation with only one unknown variable Q, water depth is derived from the continuity equation using the two-step predictorcorrector method, and the discrete scheme is the explicit upwind scheme. The results of numerical tests showed the HEDWE approach has several major advantages. 1) It is a stable numerical method, even for an initially dry area. 2) Its computational efficiency is higher than 4.76E+05 times/s. 3) It can be used for overland flow, river flow, and combinations thereof. The primary disadvantages of the HEDWE approach are its unsuitability for rapidly varying flow, such as dam-break floods.

关键词： Dynamic wave Flood routing Channel routing Overland flow

Construction of [1]rotaxanes with pillar[5]arene as the wheel and terpyridine as the stopper

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Chinese Chemical Letters 2020年第1期31卷 81-83页

作者： ling-ling zhao Ying Han Chao-Guo Yan College of Chemistry & Chemical Engineering Yangzhou University

The condensation reaction ofω-aminoalkyleneamide-functionalized pillar[5]arenes with 2-(4-([2,2’:6’,2〃-terpyridin]-4’-yl)phenoxy)acetic acid or 4-(4-([2,2’:6’,2"-terpyridin]-4’-yl)phenoxy)butanoic acid in dry chloroform at room temperature under the catalysis of HOBT/EDCl resulted in novel pillar[5]arene diamido-bridged terpyridine derivatives.~1 H NMR and 2 D NOESY spectra clearly indicated that the interesting[1]rotaxanes were formed by longer alkylene such as propylene,butylene and hexylenediamido chains threading into the cavity of the pillar[5]arene and with larger terpyridine acting as the ***,the shorter ethylenediamido chain only exists outer of cavity of pillar[5]arene and the molecule exist on free form.

关键词： Pillararene TerpyridineRotaxane Amidation Interlocked molecule

GPU-Based Non-Binary LDPC Decoder with Weighted Bit-Reliability Based Algorithm

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China Communications 2020年第5期17卷 78-88页

作者： Zhanxian Liu Rongke Liu ling zhao School of Electrical and Information Engineering Beihang UniversityBeijing 100191China

In this paper, we present a graphics processing unit(GPU)-based implementation of a weighted bit-reliability based(w BRB) decoder for non-binary LDPC(NB-LDPC) codes. To achieve coalesced memory accesses, an efficient data structure for the w BRB algorithm is proposed. Based on the Single-Instruction Multiple-Threads(SIMT) programming model, a novel mapping strategy with high intra-frame parallelism is presented to improve the latency and throughput performance. Moreover, by using Single-Instruction Multiple-Data(SIMD) intrinsics, four 8-bit message elements are packed into a 32-bit unit and simultaneously processed. Experimental results show that the proposed w BRB decoder provides good tradeoff between error performance and throughput for the codes with relatively large column degrees or high rates.

关键词： non-binary LDPC bit-reliability GPU SIMT SIMD

Effects of Halogen Substitution on Naphthazarin Tautomerism in the Ground and Excited States

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Chinese Journal of Structural Chemistry 2007年第8期26卷 980-987页

作者： zhao Xue CHEN De-Zhan WANG Zhen HAO zhao-ling Department of Chemistry Taishan University Taian 271000 China College of Chemistry Shandong Normal University Jinan 250014 China

5,8-Hihydroxyl-1,4-naphthazarin was taken as a model compound to explore the effect of halogen substitution on intramolecular proton transfer process. Calculations indicate that the substitution in the R2- and R4-positions far away from the active region has much weaker influence on the IPT process than that in the R1- and R3-positions. IPT barriers for substitution in the R1-position are higher than that of parent molecule. However, it is quite reverse for substitution in the R3-position. The IPT process is a proton transfer process coupled with charge separation and coulombic interaction would be dominant during this process. As for naphthazarin, halogen substitution would decrease the quantum yields of O2 but increase those of ^1O2.

关键词： naphthazarin intramolecular proton transfer halogen substitution

Promotional effect for SCR of NO with CO over MnO_(x)-doped Fe_(3)O_(4) nanoparticles derived from metal-organic frameworks

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Chinese Journal of Chemical Engineering 2022年第6期35卷 113-125页

作者： Yu Zhang ling zhao Ziang Chen Xinyong Li School of Ecology and Environment Inner Mongolia UniversityChina School of Environmental Science&Technology Dalian University of TechnologyChina College of Veterinary Medicine University of FloridaUnited States

MnO_(x)-Fe_(3)O_(4) nanomaterials were fabricated by using the innovative scheme of pyrolyzing manganesedoped iron-based metal organic framework in inert atmosphere and exhibited extraordinary performance of NO reduction by CO(CO-SCR).Multi-technology characterizations were conducted to ascertain the properties of fabricated materials(e.g.,TGA,XRD,SEM,FT-IR,XPS,BET,H_(2)-TPR and O_(2)-TPD).Moreover,the interaction between reactants and catalysts was ascertained by in situ *** results demonstrated that Mn was an ideal promoter for iron oxides,resulting in decrease of crystallite size,improve reducibility property,enhance the mobility and the amount of lattice O^(2-) species,as well as strength the adsorption ability of active NO and CO to form multiple species(e.g.,nitrate and carbonate).The unprecedented enhancement of CO-SCR activity over Mn-Fe nanomaterials follows the Eley-Rideal(E-R)and Langmuir-Hinshelwood(L-H)reaction pathway.

关键词： Metal-organic framework MnO_(x)-doped Fe_(3)O_(4) NO reduction In situ FT-IR Reaction mechanism

Monte Carlo simulation of sequential structure control of AN-MA-IA aqueous copolymerization by different operation modes

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Chinese Journal of Chemical Engineering 2022年第6期35卷 231-242页

作者： Tong Qin Zhenhao Xi ling zhao Weikang Yuan State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China College of Chemistry and Chemical Engineering Xinjiang UniversityUrumqi 830046China

The regulation of polyacrylonitrile(PAN)copolymer composition and sequence structure is the precondition for producing high-quality carbon fiber high *** this work,the sequential structure control of acrylonitrile(AN),methyl acrylate(MA)and itaconic acid(IA)aqueous copolymerization was investigated by Monte Carlo(MC)*** parameters used in Monte Carlo were optimized via machine learning(ML)and genetic algorithms(GA)using the experimental data from batch *** results reveal that it is difficult to control the aqueous copolymerization to obtain PAN copolymer with uniform sequence structure by batch polymerization with one-time *** contrary,it is found that the PAN copolymer with uniform composition and sequence structure can be obtained by adjusting IA feeding quantity in each reactor of a train of five ***,the results obtained in this work can provide valuable information for the understanding and optimization of AN copolymerization process to obtain high-quality PAN copolymer precursor.

关键词： Polyacrylonitrile Monte Carlo simulation Machine learning Genetic algorithms Sequence structure Operation method