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Journal of Systems Science and Information 2024年第1期12卷 81-95页

作者： Wei LI Ying liu Haizhen YANG Sha ZHANG Binhong XU School of Economics and Management Univeristy of Chinese Academy of SciencesBeijing 100190China School of Business University of Chinese Academy of Social SciencesBeijing 102488China

This study investigates the impact of online-to-offline(O2O)platforms,such as *** and Meituan,on offline sales in low-frequency-high-consumption industries,specifically a mid-to-highend liquor distribution *** data from 77 offline stores in Beijing collected during 2019-2022,the study employs a VAR model to analyze the relationship between offline sales and the use of O2O *** results reveal a long-term equilibrium between the two,with most indicators showing a positive impact of O2O platforms on offline *** research provides valuable insights for lowfrequency-high-consumption enterprises in making multi-channel decisions and quantifies the impact of O2O platforms on offline sales.

关键词： O2O platform low-frequency-high-consumption liquor distribution chain enterprise store sales VAR model

Achievable hole concentration at room temperature as a function of Mg concentration for MOCVD-grown p-GaN after sufficient annealing

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Journal of Semiconductors 2024年第8期45卷 67-73页

作者： Siyi Huang Masao Ikeda Feng Zhang Minglong Zhang Jianjun Zhu Shuming Zhang Jianping liu School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of SciencesSuzhou 215123China Key Laboratory of Nanodevices and Applications Chinese Academy of SciencesSuzhou 215123China

Relationship between the hole concentration at room temperature and the Mg doping concentration in p-GaN grown by MOCVD after sufficient annealing was studied in this *** annealing conditions were applied to obtain sufficient activation for p-GaN samples with different Mg doping *** concentration,resistivity and mobility were characterized by room-temperature Hall *** Mg doping concentration and the residual impurities such as H,C,O and Si were measured by secondary ion mass spectroscopy,confirming negligible compensations by the *** hole concentration,resistivity and mobility data are presented as a function of Mg concentration,and are compared with literature *** appropriate curve relating the Mg doping concentration to the hole concentration is derived using a charge neutrality equation and the ionized-acceptor-density[N-(A)^(-)](cm^(−3))dependent ionization energy of Mg acceptor was determined asE_(A)^(Mg)=184−2.66×10^(−5)×[N_(A)^(-)]1/3 meV.

关键词： p-GaN hole concentration electrical properties annealing ionization energy

负责任的中国智造:工业机器人应用、要素赋结构与企业ESG表现

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现代金融研究 2024年第9期29卷 3-12页

作者：崔传涛杨胤豪关慧琳刘敬北京师范大学湾区国际商学院广东财经大学经济学院

本文基于2010-2022年中国制造业上市公司和工业机器人数据,实证检验机器人应用对企业ESG表现的影响。研究表明:机器人应用通过能耗强度降低、内部质量控制、经营效率优化和生产协同增效改善企业ESG表现。此外,机器人应用既能强化高市场... 详细信息

本文基于2010-2022年中国制造业上市公司和工业机器人数据,实证检验机器人应用对企业ESG表现的影响。研究表明:机器人应用通过能耗强度降低、内部质量控制、经营效率优化和生产协同增效改善企业ESG表现。此外,机器人应用既能强化高市场化程度地区企业的ESG先发优势,又能弥补老龄化地区、老工业基地城市和高污染高耗能行业的ESG后发劣势。扩展分析发现,机器人应用对企业ESG表现的改善不仅能提高客户稳定性并降低企业经营风险,还可以有效治理ESG“漂绿”行为。研究结论为完善智能制造产业布局、更好利用智能制造变革构筑ESG优势提供启示。

关键词：工业机器人要素赋结构 ESG表现绿色转型制造业企业

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International Journal of Oral Science 2024年第3期16卷 398-412页

作者： Yunfan Zhang Jiale Yan Yuning Zhang Hao liu Bing Han Weiran Li Department of Orthodontics Peking University School and Hospital of Stomatology&National Center for Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Laboratory for Digital and Material Technology of Stomatology&Beijing Key Laboratory of Digital Stomatology&Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health&NMPA Key Laboratory for Dental MaterialsBeijingChina

Compared with teenage patients,adult patients generally show a slower rate of tooth movement and more pronounced alveolar bone loss during orthodontic treatment,indicating the maladaptation of alveolar bone homeostasis under orthodontic ***,this phenomenon is not well-elucidated to date,leading to increased treatment difficulties and unsatisfactory treatment outcomes in adult *** to provide a comprehensive knowledge and further inspire insightful understanding towards this issue,this review summarizes the current evidence and underlying *** age-related abatements in mechanosensing and mechanotransduction in adult cells and periodontal tissue may contribute to retarded and unbalanced bone metabolism,thus hindering alveolar bone reconstruction during orthodontic *** this end,periodontal surgery,physical and chemical cues are being developed to reactivate or rejuvenate the aging periodontium and restore the dynamic equilibrium of orthodontic-mediated alveolar bone *** anticipate that this review will present a general overview of the role that aging plays in orthodontic alveolar bone metabolism and shed new light on the prospective ways out of the impasse.

关键词： alveolar metabolism homeostasis

Supercritical fluid technology:A game-changer for biomacromolecular nanomedicine preparation and biomedical application

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Chinese Chemical Letters 2024年第7期35卷 89-99页

作者： Yating Zheng Yulan Huang Jing Luo Xuqi Peng Xiran Gui Gang liu Yang Zhang State Key Laboratory of Vaccines for Infectious Diseases Xiang An Biomedicine LaboratoryNational Innovation Platform for Industry-Education Integration in Vaccine ResearchState Key Laboratory of Molecular Vaccinology and Molecular DiagnosticsCenter for Molecular Imaging and Translational MedicineSchool of Public HealthXiamen UniversityXiamen 361102China Shen Zhen Research Institute of Xiamen University Shenzhen 518057China Division of Urology and Department of Surgery Brigham and Women's HospitalHarvard Medical SchoolBostonMA 02115United States Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361102China

Biomacromolecules are attractive in biomedical applications as therapeutic agents and potential drug carriers due to their natural active components,good biocompatibility,and high ***,their large relative molecular weight,complex structure,susceptibility to degradation,and poor stability limit their *** can address these issues by improving the therapeutic value,bioavailability,permeability,and absorption of biomacromolecules while regulating their retention time in the ***,compelling evidence has been reported that supercritical fluid(SCF)technology has emerged as an alternative that maintains the integrity of biomacromolecules and reduces environmental *** this review,we highlight a set of unique nanosizing strategies based on SCF technology for biomacromolecular nanomedicine,and extensively discuss their characteristics and *** particular,the protein-based,nucleic acid-based,and polysaccharide-based nanomedicine preparations via SCF technology and their biomedical applications are summarized,and the potential for industrial production of biomacromolecular drugs is also *** further provide perspectives on the opportunities and challenges in this excellent field of biomacromolecular drugs nanotechnology.

关键词： Biomacromolecules Supercritical fluid technology Therapeutic proteins Gene therapy Nanomedicine

A review on adhesion behavior of chip seal pavement and aggregate

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第3期11卷 441-466页

作者： Yuming Zhou Zhuyi Peng Jinyu Wang Jianguo Wei Hao liu Di Wang Jinming Li Key Laboratory of Road Structure and Material of Ministry of Transport(Changsha) Changsha University of Science and TechnologyChangsha 410114China School of Traffic and Transportation Engineering Changsha University of Science and TechnologyChangsha 410114China Wuhan Huike Testing Co. Ltd.Wuhan 430000China Department of Civil Engineering University of OttawaON KIN 6N5Canada CCCC Infrastructure Maintenance Group Co. Ltd.Beijing 100102China

Chip seal is widely used for preventive maintenance to mitigate pavement deterioration,but it is prone to aggregate loss during pavement *** further promote the development and application of chip seals in road engineering in China,the research progress of the adhesion behavior of aggregate and binder in chip seals was reviewed in this paper,focusing on the adhesion mechanism of emulsified asphalt and alkaline *** Influencing factors and evaluation methodology of chip seals'aggregate adhesion behavior were also *** results demonstrate that the adhesion process between emulsified asphalt and alkaline aggregate is divided into three processes including infiltration,demulsification,and cluster,which is more complicated when compared to hot *** designing a chip seal,not only the characteristics of single material should be paid attention to,but also the combination of binder and aggregate matters a *** form good adhesion between aggregate and asphalt binder,various influencing factors such as material selection,design method,and construction technical index should be considered comprehensively in the whole design,construction,and operation *** methods for evaluating adhesion behavior are summarized,including macroscopic adhesion performance tests,image analysis technology,and model *** is not objective to evaluate the aggregate adhesion behavior of chip seal only by a single evaluation method.A comprehensive evaluation based on the micro-macro multi-scale method should be considered in the future.

关键词： Chip seal Adhesion behavior Asphalt binder Aggregate

Carbon dots confined nanosheets assembled NiCO_(2)S_(4)@CDs cross-stacked architecture for enhanced sodium ion storage

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Chinese Chemical Letters 2024年第7期35卷 508-513页

作者： Binyang Qin Mengqi Wang Shimei Wu Yining Li Chilin liu Yufei Zhang Haosen Fan School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China

Na^(+)batteries(SIBs)have been emerging as the most promising candidate for the next generation of secondary ***,the development of high-performance and cost-effective anode materials is urgently needed for the large-scale applications of *** this study,carbon dots confined bimetallic sulfide(NiCO_(2)S_(4))architecture(NiCO_(2)S_(4)@CDs)was proposed and synthesized from assembling nanosheets into cross-stacked superstructure and the subsequent confinement of carbon *** novel decussated structure assembly from nanosheets is greatly beneficial to the structure stability of electrode material during the successive charge/discharge ***,the CDs based carbon conductive network can enhance the electrical conductivity for facilitating the easy transport of electron/Na^(+).Benefitting from these advantages,NiCO_(2)S_(4)@CDs exhibits high-rate performance and an ultralong cycling life in ***,the specific capacity of NiCO_(2)S_(4)@CDs can reach the discharge specific capacity as high as 568.9 mAh/g at 0.5 A/g,which can also maintain 302.7 m Ah/g after 750 cycles at 5.0 A/***,ex-situ characterization techniques such as ex-situ XRD and ex-situ XPS were employed to further explore the sodium storage mechanism of the NiCO_(2)S_(4)@CDs anode.

关键词： Carbon dots Sodium ion batteries NiCo_(2)S_(4)@CDs Cross-stacked architecture Ex-situ XRD and XPS

Risk evaluation for the task transfer of an aircraft maintenance program based on a multielement connection number

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Frontiers of Engineering Management 2024年第1期11卷 16-31页

作者： Tao liu Zhibo SHI Huifen DONG Jie BAI Yu YAN College of Electronics Information and Automation Civil Aviation University of ChinaTianjin 300300China College of Airworthiness Civil Aviation University of ChinaTianjin 300300China

This paper proposes a framework for evaluating the efficacy and suitability of maintenance programs with a focus on quantitative risk assessment in the domain of aircraft maintenance task transfer. The analysis is anchored in the principles of Maintenance Steering Group-3 (MSG-3) logic decision paradigms. The paper advances a holistic risk assessment index architecture tailored for the task transfer of maintenance programs. Utilizing the analytic network process (ANP), the study quantifies the weight interrelationships among diverse variables, incorporating expert-elicited subjective weighting. A multielement connection number-based evaluative model is employed to characterize decision-specific data, thereby facilitating the quantification of task transfer-associated risk through the appraisal of set-pair potentials. Moreover, the paper conducts a temporal risk trend analysis founded on partial connection numbers of varying orders. This analytical construct serves to streamline the process of risk assessment pertinent to maintenance program task transfer. The empirical component of this research, exemplified through a case study of the Boeing 737NG aircraft maintenance program, corroborates the methodological robustness and pragmatic applicability of the proposed framework in the quantification and analysis of mission transfer risk.

关键词： risk evaluation maintenance steering group analytic network process task transfer maintenance program

Evolution model and failure mechanisms of rainfall-induced cracked red clay slopes:insights from Xinshao County,China

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Journal of Mountain Science 2024年第3期21卷 867-881页

作者： JIAO Weizhi ZHANG Ming LI Peng XIE Junjin PANG Haisong liu Fuxing YANG Long Faculty of Engineering China University of GeosciencesWuhan 430074China

Red clay landslides are widely distributed worldwide,resulting in severe loss of life and *** rainfall-induced red clay slopes have received extensive attention,the role of cracks in the evolutionary process of red clay slopes and their connection to failure mechanisms is still poorly understood.A comprehensive approach integrating field investigation,laboratory tests,and numerical simulations was conducted to study the 168 red clay landslides in Xinshao County,*** results show that red clay is prone to forming cracks at high moisture content due to its low swelling and high shrinkage *** failure mode of red clay slopes can be summarized in three stages:crack generation,slope excavation,and slope ***,the retrospective analysis and numerical simulations of the typical landslide in Guanchong indicated that intense rainfall primarily impacts the shallow layer of soil within approximately 0.5 m on the intact ***,cracks change the pattern of rainfall infiltration in the *** infiltrates rapidly through the preferential channels induced by the cracks rather than uniformly and slowly from the slope *** results in a significant increase in both the depth of infiltration and the saturated zone area of the cracked slope,reaching 3.8 m and 36.2 m^(2),***,the factor of safety of the slope decreases by 13.4%compared to the intact slope,ultimately triggering *** study can provide valuable insights into understanding the failure mechanisms of red clay slopes in China and other regions with similar geological settings.

关键词： Red clay slopes Cracks Preferential flow Failure mechanism

Experimental study on the variation of optical remote sensing imaging characteristics of internal solitary waves with wind speed

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Journal of Oceanology and Limnology 2024年第2期42卷 408-420页

作者： Zhe CHANG Lina SUN Tengfei liu Meng ZHANG Keda LIANG Junmin MENG Jing WANG School of Physics and Optoelectronic Engineering Ocean University of ChinaQingdao 266100China First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Technology Innovation Center for Ocean Telemetry Ministry of Natural ResourcesQingdao 266061China

Optical remote sensing has been widely used to study internal solitary waves(ISWs).Wind speed has an important effect on ISW imaging of optical remote *** light and dark bands of ISWs cannot be observed by optical remote sensing when the wind is too *** relationship between the characteristics of ISWs bands in optical remote sensing images and the wind speed is still *** influence of wind speeds on the characteristics of the ISWs bands is investigated based on the physical simulation experiments with the wind speeds of 1.6,3.1,3.5,3.8,and 3.9 m/*** experimental results show that when the wind speed is 3.9 m/s,the ISWs bands cannot be observed in optical remote sensing images with the stratification of h_(1)∶h_(2)=7∶58,ρ_(1)∶ρ_(2)=1∶*** the wind speeds are 3.1,3.5,and 3.8 m/s,which is lower than 3.9 m/s,the ISWs bands can be obtained in the simulated optical remote sensing *** location of the band’s dark and light extremum and the band’s peak-to-peak spacing are almost not affected by wind ***-significant wind speeds can cause a greater gray difference of the light-dark *** provided a scientific basis for further understanding of ISW optical remote sensing imaging.

关键词： internal solitary wave(ISW) optical remote sensing wind speed characteristics of ISWs bands