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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

Synthesis of super-fine L1_(0)-FePt nanoparticles with high ordering degree by two-step sintering under high magnetic field

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Journal of Materials Science & Technology 2021年第14期73卷 178-185页

作者： Dong zhao Xiaoyang Wang ling Chang Wenli Pei Chun Wu fei Wang Luran Zhang Jianjun Wang Qiang Wang Key Laboratory of Anisotropy and Texture of Materials(Ministry of Education) Northeastern UniversityShenyang110819China Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang110819China School of Materials Science and Engineering Liaoning Technical UniversityFuxin123000China College of Mechanical Engineering Shenyang UniversityShenyang110044China School of Materials Science and Engineering Yunnan UniversityKunming650091China

Super-fine L1_(0)-Fe Pt nanoparticles(NPs)with high ordering degree were successfully prepared by a modified two-step sintering method,which includes low-temperature pre-sintering,and the high magnetic field(HMF)assisted post-sintering *** particle size of the L1_(0)-FePt NPs was obviously refined by lowering the sintering *** applying the HMF during the post-sintering process,the fine size characteristics of L1_(0)-Fe Pt NPs were retained,and the ordering degree was significantly *** L1_(0)-Fe Pt NPs with sizes of about 4.5 nm,ordering degree of 0.940,and coercivity of 22.01 k Oe were obtained by this two-step sintering under a magnetic field of 12 *** mechanism investigation of HMF enhancing the ordering degree indicates that the HMF enhances lattice distortion and magnetization energy(Zeeman energy).The enhanced lattice distortions cause high stress existing in the lattice,which can effectively promote the disordered-order *** the magnetic field reaches to 3 T,the Zeeman energy of the NPs is higher than the thermal disturbing energy of the NPs,and the magnetization effect is ***,the HMF(higher than 3 T)can obviously improve the disorder-order transition by lowering the energy barrier and accelerating the orderly diffusions of *** HMF is a promising assistant to synthesize the L1_(0)-phase NPs with both of high ordering degree and super-fine size.

关键词： L1_(0)-FePt nanoparticles Super-fine size Disorder-order transition High magnetic field Zeeman energy

Crocetin protects cardiomyocytes against hypoxia/reoxygenation injury by attenuating Drp1-mediated mitochondrial fission via PGC-1α

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Journal of Geriatric Cardiology 2023年第1期20卷 68-82页

作者： You-ling MOU Rui zhao Shi-Ying LYU Zi-Yi ZHANG Mei-fei ZHU Qian LIU School of Pharmaceutical Sciences Zhejiang Chinese Medical UniversityHangzhouChina Department of Critical Care Medicine the First Affiliated HospitalZhejiang Chinese Medical UniversityHangzhouChina

BACKGROUND Saffron(Crocus sativus L.)has been traditionally used as food,spice,and ***(CRT),as main bioactive component of saffron,has accumulated pieces of beneficial evidence on myocardial ischemia/reperfusion(I/R)***,the mechanisms are poorly *** study aims to investigate the effects of CRT on H9c2 cells under hypoxia/reoxygenation(H/R)and elucidated the possible underlying *** H/R attack was performed on H9c2 *** counting kit-8 was used to detect the cell *** samples and culture supernatants were evaluated via commercial kits to measure the superoxide dismutase(SOD)activity,malondialdehyde(MDA)content,and cellular adenosine triphosphate(ATP)*** fluorescent probes were used to detect cell apoptosis,intracellular and mitochondrial reactive oxygen species(ROS)content,mitochondrial morphology,mitochondrial membrane potential(MMP),and mitochondrial permeability transition pore(mPTP)*** were evaluated via Western *** H/R exposure severely reduced cell viability and increased LDH *** proliferator-activated receptorγcoactivator-1α(PGC-1α)suppression and dynamin-related protein 1(Drp1)activation were coincided with excessive mitochondrial fission,mitochondrial permeability transition pore(mPTP)opening and mitochondrial membrane potential(MMP)collapse in H9c2 cells treated with H/*** fragmentation under H/R injury induced ROS over-production,oxidative stress,and cell ***,CRT treatment significantly prevented mitochondrial fission,mPTP opening,MMP loss,and cell ***,CRT sufficiently activated PGC-1α and inactivated ***,mitochondrial fission inhibition with mdivi-1 similarly suppressed mitochondrial dysfunction,oxidative stress and cell ***,silencing PGC-1α with small interfering RNA(siRNA)abolished the beneficial effects of CRT on H9c2 cells under H/R injury,accompanied with increased Drp1 an

关键词： Drp1 injury traditionally

Palladium-catalyzed multi-acetoxylation of 1,3-disubstituted 1H-pyrazole-5-carboxylates via direct C(sp^2)-H or C(sp^3)-H bond activation

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Chinese Chemical Letters 2016年第10期27卷 1617-1621页

作者： Jun Ding Ying Guo ling-Yan Shao fei-Yi zhao Dao-Hua Liao Hong-Wei Liu Ya-fei Ji School of Pharmacy East China University of Science & Technology

A palladium-catalyzed multi-acetoxylation of 1,3-disubstituted 1H-pyrazole-5-carboxylate derivatives containing multiple potential reactive sites is described. Therein, the sequence of this process has been appropriately investigated. The protocol mainly provides the di- and tri-acetoxylated products for 1,3- diarylpyrazoles. Besides, it is found that the acetoxylation of C（sp3）-H bond is prior to that of C（sp2）-H bond under structurally competitive conditions.

关键词： Palladium catalysisFunctionalized pyrazolesMulti-acetoxylationC-H activationMonodentate directing group

Research on Seismic Interpretation Method of Karst-Fractured Zone

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Journal of China University of Mining and Technology 2005年第1期15卷 12-15页

作者： CUIRuo-fei ZHANGCong-ling SchoolofResourceandEarthSciences ChinaUniversityofMining＆TechnologyXuzhouJiangsu221008China

In this paper, the fundamentals of predicting karst-fractured zones using both seismic attribute technique and pattern recognition method are introduced. Ordovician limestone karst-fractured zones in the First Mining Area of Wutongzhuang Coal Mine were forecast by using practical seismic data. The result shows that both seismic attribute technique and pattern recognition method are effective in predicting karst-fractured zones.

关键词： seismic attribute pattern recognition karst-fractured zone

Trotter–Kato Approximations of Impulsive Neutral SPDEs in Hilbert Spaces

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Acta Mathematica Sinica,English Series 2024年第5期40卷 1229-1243页

作者： Ming LIU Xia ZHANG ling fei DAI School of Mathematical Sciences Tiangong UniversityTianjin 300387P.R.China

This paper studies a class of impulsive neutral stochastic partial differential equations in real Hilbert *** main goal here is to consider the Trotter-Kato approximations of mild solutions of such equations in the pth-mean(p≥2).As an application,a classical limit theorem on the dependence of such equations on a parameter is *** novelty of this paper is that the combination of this approximating system and such equations has not been considered before.

关键词： Impulsive neutral stochastic partial diferential equation Trotter-Kato approximations classical limit theorem

Full ranking procedure based on best and worst frontiers

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Journal of Systems Engineering and Electronics 2015年第3期26卷 514-522页

作者： Feng Yang fei Du Liang Liang Liuyi ling School of Management University of Science and Technology of China

In the traditional data envelopment analysis （DEA） structure, the efficiency score for one decision making unit （DMU） is calculated by measuring the distance of the evaluated DMU to the best practice frontier. Recent researches have provided the reasonability of considering the worst practice frontier as a supple- ment to the traditional DEA techniques. The existing researches take only one type of frontier into account, and they cannot com- pare the evaluated DMU with both the best and the worst perform- ing DMUs. A DEA-based procedure is developed to consider the best and the worst frontiers in the same scenario where the ratio of two distances （RDS） measure is proposed. The principal appli- cation of this approach is for ranking, and, as a complement tool, for performance evaluation. The proposed approach can be used in a wide range of applications such as the performance evaluation of employees and others. Finally, a bookstore data set is used to illustrate the proposed approach.

关键词： data envelopment analysis (DEA) ranking best frontier worst frontier.

Analysis of hospitalization costs related to fall injuries in elderly patients

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World Journal of Clinical Cases 2021年第6期9卷 1271-1283页

作者： fei-Yue Su Mei-ling Fu Qing-Hua zhao Huan-Huan Huang Di Luo Ming-zhao Xiao Department of Urology The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Medical Insurance The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Nursing The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China

BACKGROUND With the aging world population,the incidence of falls has intensified and fallrelated hospitalization costs are *** are one type of event studied in the health economics of patient safety,and many developed countries have conducted such research on fall-related hospitalization ***,China,a developing country,still lacks large-scale studies in this *** To investigate the factors related to the hospitalization costs of fall-related injuries in elderly inpatients and establish factor-based,cost-related *** A retrospective study was *** information and cost data for elderly inpatients(age≥60 years,n=3362)who were hospitalized between 2016 and 2019 due to falls was collected from the medical record systems of two grade-A tertiary hospitals in *** regression(QR)analysis was used to identify the factors related to fall-related hospitalization costs.A decision tree model based on the chi-squared automatic interaction detector algorithm for hospitalization cost grouping was built by setting the factors in the regression results as separation *** The total hospitalization cost of fall-related injuries in the included elderly patients was 180479203.03 RMB,and the reimbursement rate of medical benefit funds was 51.0%(92039709.52 RMB/180479203.03 RMB).The medical material costs were the highest component of the total hospitalization cost,followed(in order)by drug costs,test costs,treatment costs,integrated medical service costs and blood transfusion costs The QR results showed that patient age,gender,length of hospital stay,payment method,wound position,wound type,operation times and operation type significantly influenced the inpatient cost(P<0.05).The cost grouping model was established based on the QR results,and age,length of stay,operation type,wound position and wound type were the most important influencing factors in the ***,the cost of each combination varied significan

关键词： Falls Elderly Hospitalization costs Quantile regression model Decision tree model Prevention

Effects of tension on vortex-induced vibration(ⅥⅤ) responses of a long tensioned cylinder in uniform flows

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Acta Mechanica Sinica 2017年第1期33卷 1-9页

作者： ling Kang fei Ge Xiaodong Wu Youshi Hong Institute of Mechanics Chinese Academy of SciencesNo. 15 Beisihuan Xi Road Beijing 100190 China

The effects of tension on vortex-induced vibration (VIV) responses for a tension-dominated long cylinder with an aspect ratio of 550 in uniform flows are experimentally investigated in this paper. The results show that elevated tension suppresses fluctuations of maximum displacement with respect to flow velocity and makes chaotic VIV more likely to appear. With respect to periodic VIV, if elevated tension is applied, the dominant vibration frequency in the in-line (IL) direction will switch from a fundamental vibration frequency to twice the value of the fundamental vibration frequency, which results in a ratio of the dominant vibration frequency in the IL direction to that in the cross-flow direction of 2.0. The suppression of the elevated tension in the fluctuation of the maximum displacement causes the axial tension to become an active control parameter for the VIV maximum displacement of a tension-dominated long riser or tether of an engineering structure in deep oceans. However, the axial tension must be optimized before being used since the high dominant vibration frequency due to the elevated tension may unfavorably affect the fatigue life of the riser or tether.

关键词： Tension effect Maximum displacement Dominant vibration frequency Chaos