检索结果-南通市图书馆

Studying the co-evolution of information diffusion,vaccination behavior and disease transmission in multilayer networks with local and global effects

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第3期33卷 677-689页

作者：霍良安武兵杰 business school University of Shanghai for Science and TechnologyShanghai 200093China school of Intelligent Emergency Management University of Shanghai for Science and TechnologyShanghai 200093China

Today,with the rapid development of the internet,a large amount of information often accompanies the rapid transmission of disease outbreaks,and increasing numbers of scholars are studying the relationship between information and the disease transmission process using complex *** fact,the disease transmission process is very *** this information,there will often be individual behavioral measures and other factors to *** of the previous research has aimed to establish a two-layer network model to consider the impact of information on the transmission process of disease,rarely divided into information and behavior,*** carry out a more in-depth analysis of the disease transmission process and the intrinsic influencing mechanism,this paper divides information and behavior into two layers and proposes the establishment of a complex network to study the dynamic co-evolution of information diffusion,vaccination behavior,and disease *** is achieved by considering four influential relationships between adjacent layers in multilayer *** the information layer,the diffusion process of negative information is described,and the feedback effects of local and global vaccination are *** the behavioral layer,an individual's vaccination behavior is described,and the probability of an individual receiving a vaccination is influenced by two factors:the influence of negative information,and the influence of local and global disease *** the disease layer,individual susceptibility is considered to be influenced by vaccination *** state transition equations are derived using the micro Markov chain approach(MMCA),and disease prevalence thresholds are *** is demonstrated through simulation experiments that the negative information diffusion is less influenced by local vaccination behavior,and is mainly influenced by global vaccination behavior;vaccination behavior is mainly influenced by local d

关键词： information diffusion vaccination behavior disease transmission multilayer networks local and global effect

Spatial Differentiation and Convergence Trend of High-quality Development Level of China’s Tourism Economy

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2024年第2期34卷 230-249页

作者： CAO Shanshan HE Zhaoli NIU Jinlan WANG Songmao ZHAO Lei school of Geography and Ocean Science Nanjing UniversityNanjing 210046China school of business Administration Nanjing University of Finance and EconomicsNanjing 210046China school of Economics and Management Shandong Agricultural Uni-versityTai’an 271018China school of Hotel Management Shanghai Business SchoolShanghai 201400China school of Man-agement Zhejiang University of TechnologyHangzhou 310014China

This paper aims to interpret the connotation of high-quality development of tourism economy(HQTE)from the perspective of the new development concepts of innovation,coordination,green,openness and sharing,and then to evaluate the spatial differenti-ation of China’s HQTE based on provincial panel data from 2009 to ***,we employ the spatial convergence model to ex-plore the absolute and conditionalβconvergence trends of HQTE in the whole country and the eastern,central and western regions of *** empirical results reveal that:1)within the decade,from 2009 to 2018,regions of China with the highest HQTE index is its eastern region followed by the central region and then the western region,but the fastest growing one is the western region of China fol-lowed by the central region and then the eastern region.2)Whether or not the spatial effect is included,there are absolute and condition-alβconvergence in HQTE in the whole country and aforementioned three regions.3)The degree of government attention as well as the level of economic development and location accessibility are the positive driving factors for the convergence of HQTE in the whole country and the three *** degree of marketization and human capital have not passed the significance test either in the whole country or in the three *** above conclusions could deepen the understanding of the regional imbalance and spatial conver-gence characteristics of HQTE,clarify the primary development objects,and accomplish the goal of China’s HQTE.

关键词： new development concepts high-quality development of tourism economy(HQTE) spatial convergence China

Functional properties of defatted chickpea flour heat-induced gels

在线全文

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2024年第2期17卷 280-286页

作者： Chonghao Bi Aoxue Qie Tong Zhou Yi Liu Bin Tian school of Artificial Intelligence Beijing Technology and Business UniversityBeijing 100048China

Defatted chickpea flour(DCF),which is a by-product of chickpea oil extraction industry,is rich in nutrients that are beneficial to human *** this study,the effects of temperature and DCF variation on the rheological properties,water holding capacity,freeze-thaw stability and microstructure of DCF heat induced gels were *** results showed that the viscoelasticity,frequency dependence,and resistance strength of heat induced gels increased significantly with the increase of temperature and DCF *** degree of denaturation and water retention of heat induced gels increased significantly with increased variables within the temperature and variation windows of 75℃ to 95℃ and 13%to 21%.The CLSM results revealed that variations of both temperature and DCF variation could cause the proteins in the heat induced gels to aggregate gradually and to form protein *** temperature or variation exceeded certain value(85℃ or 17%),the protein aggregations broke up and the protein clusters became smaller and more ***,the heat induced gels presented better water holding capacity,viscoelasticity,structural stability and gel property at a temperature of 95℃ or a DCF variation of 21%within the present experimental range.

关键词： defatted chickpea flour rheological property freeze-thaw stability water holding capacity microstructure

Distributed Heterogeneous Multi-Agent Optimization with Stochastic Sub-Gradient

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2024年第4期37卷 1470-1487页

作者： HU Haokun MO Lipo CAO Xianbing school of Mathematics and Statistics Central South UniversityChangsha 410083China school of Mathematics and Statistics Beijing Technology and Business UniversityBeijing 100048China Research Centre for Agri-Product Quality Traceability Beijing Technology and Business UniversityBeijing 100048China school of Computer and Artificial Intelligence Beijing Technology and Business UniversityBeijing 100048China China Food Flavor and Nutrition Health Innovation Center Beijing Technology and Business UniversityBeijing 100048China

This paper studies the optimization problem of heterogeneous networks under a timevarying *** agent only accesses to one local objective function,which is *** improved algorithm with noisy measurement of local objective functions' sub-gradients and additive noises among information exchanging between each pair of agents is designed to minimize the sum of objective functions of all *** weaken the effect of these noises,two step sizes are introduced in the control *** graph theory,stochastic analysis and martingale convergence theory,it is proved that if the sub-gradients are uniformly bounded,the sequence of digraphs is balanced and the union graph of all digraphs is joint strongly connected,then the designed control protocol can force all agents to find the global optimal point almost *** last,the authors give some numerical examples to verify the effectiveness of the stochastic sub-gradient algorithms.

关键词： Communication noises distributed stochastic optimization heterogeneous networks subgradient measurement noises

Effects of the addition of edible polysaccharides on the properties of soybean protein isolate gels

在线全文

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2024年第3期17卷 241-248页

作者： Chonghao Bi Aoxue Qie Xueying Wang Tong Zhou Shangyi Chi Yi Liu Bin Tian school of Artificial Intelligence Beijing Technology and Business UniversityBeijing 100048China

The gel properties of soybean isolate protein(SPI)gels are susceptible to the influence of other components in food products,particularly edible ***,six common edible polysaccharides were selected in this study to investigate their effects on the rheological properties,thermal properties,and microstructure of acid-induced soybean isolate protein self-assembled gels(SPIASG).The experimental results showed that the support capacity and creep recovery of SPIASG with added polysaccharides were higher than those of the control group without added polysaccharides,and the gel with Xanthan gum(XG)was the most *** hybrid gel,with added Condensed resin(CR),Xanthan gum(XG),Carrageenan(CA),and CMC formed a stronger network ***,compared with SPIASG,the hybrid gel with added edible polysaccharides the water-holding capacity of SPI hybrid gels was relatively *** this study,a simple and easy method was obtained to significantly improve the gel properties of SPIASG,analyzed and compared the effectiveness of various polysaccharides to enhance its gel properties,and provided some ideas to improve the gel properties of SPI protein gels.

关键词： soybean protein isolate gels self-assembled gels edible polysaccharides rheological properties

A Superior Sales Mode for a Two-Echelon Supply Chain of Perishable Products

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Science and Information 2024年第2期12卷 274-293页

作者： Mengqi BAO Xiaozhen DAI school of Management Wenzhou Business CollegeWenzhou 325035China

This paper considers sales mode selection issues for a two-echelon supply chain of perishable products involving a supplier and a ***’purchase desire is assumed to be positive correlation with the freshness of the ***,the traditional sales mode is examined,in which the supplier and the retailer play a Stackelberg *** propose a three-layer decision model for this situation,and obtain dynamic pricing strategies and selling cycle *** is shown that the retailer has little motivation to order many perishable products so as to avoid a long selling cycle ***,the commission-charge mode is analyzed,in which the retailer declares its decision *** this mode,we demonstrate that the perishable product will be on sale during the whole shelf life under a certain *** correlation between the sales price of each stage and the remaining shelf-life length is ***,the superiority analysis for the two sales modes is *** show the relation between the selling cycle lengths of the two *** our analysis,it is shown that both the supplier and the retailer gain more profits when the commission-charge mode is adopted and the commission rate locates in a certain open ***,a numerical illustration is presented to visualize the discussed models,and some supplements are made for the acquired conclusions by the illustration.

关键词： pricing sales mode commission-charge mode selling cycle length superiority analysis

Green development and economic resilience:Evidence from Chinese resource-based cities

在线全文

学校读者我要写书评

暂无评论

Frontiers of Engineering Management 2024年第2期11卷 194-206页

作者： Zongrun WANG Xuxin CAO Xiaohang REN school of business Central South UniversityChangsha 410083China

Resource-based cities are currently facing challenges due to ecological pollution and an unbalanced industrial structure,which hinders sustainable economic *** focus on green development as a strategy for economic growth and environmental protection is becoming increasingly *** study employs a spatial econometric model to explore the effect of green development on economic resilience in Chinese resource-based cities from 2011 to 2019,revealing a positive correlation between green development and economic *** each 1 unit increase in green development,economic resilience increases by an average of 0.512 ***,the analysis of heterogeneity reveals differences in the factors influencing various resource-based *** addition,provincial green policies bolster economic resilience by encouraging green *** research aids in comprehending the balance between the economy and the environment.

关键词： economic resilience green development spatial econometric models resource-based cities

Cross-border E-commerce and China's Exports during the COVID-19 Pandemic

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China & World Economy 2024年第3期32卷 215-242页

作者： Yi Che Meng Yuan Yan Zhang Lin Zhao school of business East China University of Science and TechnologyChina school of business Xiangtan UniversityChina school of Economics Shanghai University of Finance and EconomicsChina

China's exports experienced a rapid recovery after the outbreak of the 2019 COVID-19 pandemic.A primary engine was cross-border e-commerce(CBEC)trade,which bucked the downward export trend during the *** exploring the variation in the number of CBEC comprehensive pilot zones across provinces,we identified the causal impact of CBEC on exports using monthly province-product-destination data for 2019 and *** found strong and robust evidence that CBEC contributed to exports during the pandemic by promoting the expansion of incumbent exports(intensive margin)rather than through the expansion of product categories and exporting partners(extensive margin).Specifically,higher pandemic risk suppressed the role of CBEC at the intensive margin while enhancing it at the extensive *** to developed countries benefited more from CBEC,both intensively and *** with final products,a larger number of intermediate products were exported through CBEC after the outbreak of the pandemic.

关键词： China's exports COVID-19 pandemic cross-border e-commerce extensive margin of trade intensive margin of trade

Registration system reform and initial public offering ownership preference:Evidence from China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Journal of Accounting Research 2024年第1期17卷 74-95页

作者： Xihao Wu Di Zhang Zhongxin Wu International business school Hainan UniversityChina

Whether registration system reform(RSR)can curb administrative intervention and create a fair market environment has long been a concern in *** explore this issue from the perspective of the initial public offering(IPO)preference based on the entropy balancing method,and findings are as ***,an IPO ownership preference exists under approval *** is,state-owned enterprises(SOEs)are more likely than private enterprises to obtain IPO ***,RSR significantly changes this preference,especially for non-politically connected private ***,the post-IPO market performance of SOEs is inferior to that of private enterprises under approval system,thus excluding the view that approval is prioritized for SOEs because of superior ***,compared with SOEs,private enterprises are more likely to switch the issuance system from approval system to registration system;this change makes it easier for them to obtain IPO approval,indicating that private enterprise owners perceive the registration channel to be ***,the effect of RSR on IPO ownership preference mainly occurs in companies in three major urban agglomerations in China—the Pearl River Delta,the Yangtze River Delta,and the Beijing–Tian jin–Hebei region—and in technology-intensive ***,our findings reveal that RSR cultivates a fairer IPO approval process.

关键词： Registration system reform Administrative intervention Approval system IPO ownership preference