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Detecting compromised accounts caused by phone number recycling on e-commerce platforms: taking Meituan as an example

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Frontiers of Information Technology & electronic engineering 2024年第8期25卷 1077-1095页

作者： Min GAO Shutong CHeN Yangbo GAO Zhenhua ZHANG Yu CHeN Yupeng LI Qiongzan Ye Xin WANG Yang CHeN School of computer Science Fudan UniversityShanghai 200438China shanghai Key Lab of Intelligent Information Processing Fudan UniversityShanghai 200438China Meituan Beijing 100005China Department of Interactive Media Hong Kong Baptist UniversityHong Kong 999077China

Phone number recycling(PNR)refers to the event wherein a mobile operator collects a disconnected number and reassigns it to a new *** has posed a threat to the reliability of the existing authentication solution for e-commerce ***,a new owner of a reassigned number can access the application account with which the number is associated,and may perform fraudulent *** solutions that employ a reassigned number database from mobile operators are costly for e-commerce platforms with large-scale ***,alternative solutions that depend on only the information of the applications are *** this work,we study the problem of detecting accounts that have been compromised owing to the reassignment of phone *** analysis on Meituan's real-world dataset shows that compromised accounts have unique statistical features and temporal *** on the observations,we propose a novel model called temporal pattern and statistical feature fusion model(TSF)to tackle the problem,which integrates a temporal pattern encoder and a statistical feature encoder to capture behavioral evolutionary interaction and significant operation *** experiments on the Meituan and Ieee-CIS datasets show that TSF significantly outperforms the baselines,demonstrating its effectiveness in detecting compromised accounts due to reassigned numbers.

关键词： Phone number recycling Neural networks e-commerce compromised account detection

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The influence of different types of satisfaction on loyalty on C2C online shopping platform:From the perspective of sellers and the platform

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中国科学技术大学学报 2024年第5期54卷 36-48,I0007页

作者： Yanan Lu Qian Huang Yuting Wang School of Management University of Science and Technology of ChinaHefei 230026China SILC Business School Shanghai UniversityShanghai 201800China

With the rise and development of major types of platforms,the competition for resources has become extremely fierce,and the market share of C2C platforms has been seriously threatened by the loss of ***,building and maintaining buyers’satisfaction and loyalty to C2C platforms is critical to the survival and sustainability of C2C platforms in ***,the current knowledge on how platform satisfaction and loyalty are constructed in the C2C e-commerce environment is *** this study,seller-based satisfaction and platform-based satisfaction are constructed *** further distinguish seller-based transaction satisfaction into economic and social satisfaction and explore their antecedents and *** test our research hypotheses,we conduct a survey and collect data from a real online market(Taobao website).The results show that seller-based transaction satisfaction positively affects platform-based overall satisfaction and loyalty,and that perceived product quality,perceived assurance,and perceived price fairness all have a significant effect on economic satisfaction,whereas perceived relationship quality and perceived empathy significantly influence social *** findings help us understand the literature related to customer satisfaction in the context of C2C in China and provide inspiration for online sellers and platforms.

关键词： transaction-specific satisfaction social and economic satisfaction various antecedents of satisfaction overall satisfaction C2C online shopping platform

Mysteel废钢调研:库存同比去年增加节后补库上涨空间有限

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中国废钢铁 2019年第1期 49-50页

作者：朱怡汪盈倩 shanghai ganglian e-commerce holdings co.ltd.

随着春节的接近尾声,废钢供货商陆续返市,节后第一周在钢坯和铁矿石涨后回落的带动下,北方钢厂废钢采购价格积极调整,呈现先扬后抑、涨跌互现态势;相对的,南方废钢行情较为平稳,电炉厂普遍在元宵节左右复产,目前观望情绪较浓。

关键词：废钢空间库存调研采购价格铁矿石元宵节电炉

Optimization and Innovation of the Operation Model of Mobile Social e-commerce under AI empowerment:Taking the Female community Platform“Little Red Book”as an example

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Proceedings of Business and economic Studies 2024年第4期7卷 269-274页

作者： Mi Liu Jia Yu Yan Li Jun Zheng Department of Business Management of shanghai Information Technology college Shanghai 20033China School of Information Science and Technology Shanghai Shanda UniversityShanghai 20033China

This article takes the female community platform“Little Red Book”as an example to explore the optimization and innovation of mobile community e-commerce operation mode under Artificial Intelligence(AI)***,the relevant concepts were defined,and then the unique attributes of mobile community e-commerce were *** a typical representative of mobile community e-commerce,Little Red Book introduces the background and characteristics of its platform,analyzes its mobile community operation mode,and focuses on exploring how to establish a mobile community e-commerce platform and effective operation mode under the empowerment of AI technology,to provide some reference and inspiration for the development and operation of Little Red Book and other e-commerce platform enterprises.

关键词： Mobile social e-commerce Little Red Book Female community platform AI User experience UGC

SMeC:Scene Mining for e-commerce

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Journal of computer Science & Technology 2024年第1期39卷 192-210页

作者：王罡李翔郭子义殷大伟马帅 State Key Laboratory of Software Development environment Beihang UniversityBeijing 100191China School of Data Science and engineering East China Normal UniversityShanghai 200062China *** Inc.Beijing 100176China Baidu Inc.Beijing 100085China

Scene-based recommendation has proven its usefulness in e-commerce,by recommending commodities based on a given ***,scenes are typically unknown in advance,which necessitates scene discovery for *** this article,we study scene discovery for e-commerce *** first formalize a scene as a set of commodity cate-gories that occur simultaneously and frequently in real-world situations,and model an e-commerce platform as a heteroge-neous information network(HIN),whose nodes and links represent different types of objects and different types of rela-tionships between objects,*** then formulate the scene mining problem for e-commerce as an unsupervised learning problem that finds the overlapping clusters of commodity categories in the *** solve the problem,we pro-pose a non-negative matrix factorization based method SMeC(Scene Mining for e-commerce),and theoretically prove its *** six real-world e-commerce datasets,we finally conduct an extensive experimental study to evaluate SMeC against 13 other methods,and show that SMeC consistently outperforms its competitors with regard to various evaluation measures.

关键词： graph clustering e-commerce heterogeneous information network(HIN) scene mining

Cross-border e-commerce and China's exports during the coVID-19 Pandemic

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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

codimension 2 reversible heteroclinic bifurcations with inclination flips

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Science China Mathematics 2009年第7期52卷 1801-1814页

作者： XU Yancong ZHU DeMing DeNG GuiFeng Department of Mathematics Hangzhou Normal UniversityHangzhou(Xiasha)310036China Department of Mathematics East China Normal UniversityShanghai 200241China School of Mathematics and Information Shanghai Lixiu University of CommerceShanghai 201620China

In this paper, the heteroclinic bifurcation problem with real eigenvalues and two incli- nation-flips is investigated in a four-dimensional reversible system. We perform a detailed study of this case by using the method originally established in the papers "Problems in Homoclinic Bifurcation with Higher Dimensions" and "Bifurcation of Heteroclinic Loops," and obtain fruitful results, such as the existence and coexistence of R-symmetric homoclinic orbit and R-symmetric heteroclinic loops, R-symmetric homoclinic orbit and R-symmetric periodic orbit. The double R-symmetric homoclinic bifurcation (i.e., two-fold R-symmetric homoclinic bifurcation) for reversible heteroclinic loops is found, and the existence of infinitely many R-symmetric periodic orbits accumulating onto a homoclinic orbit is demonstrated. The relevant bifurcation surfaces and the existence regions are also located.

关键词： heteroclinic bifurcation inclination flips reversible system 37G40 37C29 34C37

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Observable liveness of Petri nets with controllable and observable transitions

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Science China(Information Sciences) 2017年第11期60卷 256-264页

作者： Guanjun LIU Changjun JIANG Department of computer Science Tongji University Key Laboratory of embedded System and Service computing of Ministry of education Tongji University e-commerce Transactions and Information Services collaborative Innovation Center of shanghai University Knowledge Service Platform Tongji University

Observability and/or controllability are paid much attention to by researchers not only from the control science field[1–3]but also from the computer science field[4–9].Recently,Desel and Kilinc[4]proposed the notion of observable liveness for Petri nets with(un-)observable and(un-)controllable *** purpose of defining observable liveness is to represent that"a user can always enforce the occurrence of any observable transition only by stimulating the net by choosing appropriate enabled controllable transition"[4].An important assumption of

关键词： net cot PN Observable liveness of Petri nets with controllable and observable transitions

Isospin dependence of nucleon effective masses in neutron-rich matter

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Nuclear Science and Techniques 2016年第6期27卷 25-32页

作者： Bao-An Li Bao-Jun Cai Lie-Wen Chen Xiao-Hua Li Department of Physics and Astronomy Texas A&MUniversity-Commerce Department of Physics and Astronomy and shanghai Key Laboratory for Particle Physics and cosmology Shanghai Jiao Tong University School of Nuclear Science and Technology University of South China

In this talk,we first briefly review the isospin dependence of the total nucleon effective mass M Jinferred from analyzing nucleon-nucleus scattering data within an isospin-dependent non-relativistic optical potential model,and the isospin dependence of the nucleon e-mass M;e J obtained from applying the Migdal–Luttinger theorem to a phenomenological single-nucleon momentum distribution in nuclei constrained by recent electron-nucleus *** information about the isospin dependence of both the nucleon total effective mass and e-mass,we then infer the isospin dependence of nucleon k-mass using the well-known relation M_J~*=M_ J^(*1e).Implications of the results on the nucleon mean free path in neutron-rich matter are discussed.

关键词：同位旋相关有效质量单核子核物质丰中子平均自由程非相对论分析数据

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