检索结果-南通市图书馆

零售便利化的演进轨迹及规律研究——基于新中国成立70年来的历史考察

在线全文

学校读者我要写书评

暂无评论

北京工商大学学报（社会科学版） 2020年第1期35卷 1-11页

作者：李飞徐陶然清华大学经济管理学院北京100084 北京工商大学商学院北京100048

基于新中国成立70年来的历史考察,首先描绘了中国零售便利化的演进轨迹,包括极不便利阶段(1949—1979年)、时间便利阶段(1980—1995年)、体力便利阶段(1996—2010年)、精力便利上段(2011—2020年)等已经或正在经历的四个阶段,以及还未... 详细信息

基于新中国成立70年来的历史考察,首先描绘了中国零售便利化的演进轨迹,包括极不便利阶段(1949—1979年)、时间便利阶段(1980—1995年)、体力便利阶段(1996—2010年)、精力便利上段(2011—2020年)等已经或正在经历的四个阶段,以及还未经历的精力便利下段(2021年以后),最终实现心力便利的终极目标。其次探索性地提出了零售便利化演进的一般规律:(1)零售便利化演进是由顾客旅程中购前(搜集信息、到达店铺、商品选择)、购中(付款、收货、离店)和购后(消费、评论)三个阶段八个环节的便利化推动的。(2)零售便利化演进会依序经过极不便利、时间便利、体力便利、精力便利等四个阶段,最终进入心力便利的最高阶段。(3)时间便利、体力便利、精力便利、心力便利依序演进时,不是前一个便利化水平达到饱和之后,再开始下一个阶段的演进,而是交叉或同时进行演进。(4)各个阶段之间存在着密切的影响关系。时间便利、体力便利和精力便利三者之间存在着相互影响的关系,同时三者都会影响最终的心力便利水平。最后讨论了中国零售便利化演进的成就、存在的关键问题和未来应采取的核心对策。

关键词：便利零售便利化服务零售战略中国零售发展

网红餐厅游客感知价值的维度及焦点——基于网络文本分析的实证研究

在线全文

学校读者我要写书评

暂无评论

美食研究 2021年第1期38卷 33-42页

作者：卢长宝许陶然福州大学经济与管理学院福建福州350000

网红餐厅凭借超高的网络热度,已成为旅游目的地吸引客源的重要手段。为探索网红餐厅红火的原因,在文献回顾的基础上构建了网红餐厅游客感知价值框架,运用网络爬虫技术挖掘游客在线评论并作文本分析,从实证角度验证了感知价值的具体维度... 详细信息

网红餐厅凭借超高的网络热度,已成为旅游目的地吸引客源的重要手段。为探索网红餐厅红火的原因,在文献回顾的基础上构建了网红餐厅游客感知价值框架,运用网络爬虫技术挖掘游客在线评论并作文本分析,从实证角度验证了感知价值的具体维度及焦点,结果发现:(1)网红餐厅游客感知价值由功能价值、认知价值、社会价值和情感价值四个维度构成;(2)功能价值是游客对网红餐厅的关注焦点,其重要性远高于其他三个维度。上述发现与大众对网红餐厅游客所关注价值的判断存在差别,因此能够在丰富餐厅游客感知价值理论的同时,修正商家的误解,为网红餐厅的实际经营提供有价值的建议。

关键词：网红餐厅感知价值美食消费功能价值

在线全文

学校读者我要写书评

暂无评论

混合抗蚀剂法制备纳米球型SERS基底

光学学报 2022年第15期42卷 186-195页

作者：周一轩杨婧徐陶然乔治牟达陈佩佩褚卫国长春理工大学光电工程学院吉林长春130022 国家纳米科学中心纳米加工实验室中国科学院纳米光子材料与器件重点实验室(筹)中国科学院纳米科学卓越创新中心北京100190 中国环境监测总站国家环境保护环境监测质量控制重点实验室北京100012 中国科学院大学材料与光电研究中心北京100049

报道了一种利用混合抗蚀剂的一步电子束曝光制备表面增强拉曼散射(SERS)基底的新方法。基于氢倍半硅氧烷(HSQ)和聚甲基丙烯酸甲酯(PMMA)电子束抗蚀剂的混合产生相分离形成纳米球体的现象,并利用合适剂量(2000μC/cm^(2))电子束曝光、固... 详细信息

报道了一种利用混合抗蚀剂的一步电子束曝光制备表面增强拉曼散射(SERS)基底的新方法。基于氢倍半硅氧烷(HSQ)和聚甲基丙烯酸甲酯(PMMA)电子束抗蚀剂的混合产生相分离形成纳米球体的现象,并利用合适剂量(2000μC/cm^(2))电子束曝光、固化纳米球,经显影去除多余残胶后再使用电子束蒸发沉积Au薄膜,得到纳米球型SERS基底。纳米球尺寸分布均匀,相对标准偏差为7.56%,表面粗糙Au层及球之间的间隙能够提供丰富SERS“热点”,从而使其表现出良好的拉曼增强效应。该SERS基底对多种目标物均能表现出良好的检测性能。对4-巯基苯硼酸(4-MPBA)检测的SERS增强因子为5.8×10^(6),检测限为1.06×10^(-8) mol/L。对罗丹明6G(R6G)和三聚氰胺的检测限分别达到7.08×10^(-9 )mol/L和7.94×10^(-10) mol/L。三聚氰胺的检测范围为1.0×10^(-9)~1.0×10^(-5) mol/L,跨度达4个数量级,并呈现良好线性关系(R2=0.952),检测优势十分显著。这种利用不同性质抗蚀剂在纳米尺度独特的分离现象制备纳米球的方法简单、重复性好,对发展新型纳米结构高性能SERS基底及其制备方法具有重要意义。

关键词：表面光学表面增强拉曼散射(SERS) 电子束曝光痕量检测三聚氰胺

Aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders:progress of experimental models based on disease pathogenesis

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第2期20卷 354-365页

作者： Li xu Huiming xu Changyong Tang Department of Neurology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

Neuromyelitis optica spectrum disorders are neuroinflammatory demyelinating disorders that lead to permanent visual loss and motor *** date,no effective treatment exists as the exact causative mechanism remains ***,experimental models of neuromyelitis optica spectrum disorders are essential for exploring its pathogenesis and in screening for therapeutic *** most patients with neuromyelitis optica spectrum disorders are seropositive for IgG autoantibodies against aquaporin-4,which is highly expressed on the membrane of astrocyte endfeet,most current experimental models are based on aquaporin-4-IgG that initially targets *** experimental models have successfully simulated many pathological features of neuromyelitis optica spectrum disorders,such as aquaporin-4 loss,astrocytopathy,granulocyte and macrophage infiltration,complement activation,demyelination,and neuronal loss;however,they do not fully capture the pathological process of human neuromyelitis optica spectrum *** this review,we summarize the currently known pathogenic mechanisms and the development of associated experimental models in vitro,ex vivo,and in vivo for neuromyelitis optica spectrum disorders,suggest potential pathogenic mechanisms for further investigation,and provide guidance on experimental model *** addition,this review summarizes the latest information on pathologies and therapies for neuromyelitis optica spectrum disorders based on experimental models of aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders,offering further therapeutic targets and a theoretical basis for clinical trials.

关键词： aquaporin-4 experimental model neuromyelitis optica spectrum disorder pathogenesis

Reducing the measurement errors in nonadiabatic holonomic quantum computers

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 64-70页

作者： Guo-Fu xu Department of Physics Shandong University

Nonadiabatic holonomic quantum computers serve as the physical platform for nonadiabatic holonomic quantum *** quantum computation has entered the noisy intermediate-scale era, building accurate intermediate-scale nonadiabatic holonomic quantum computers is clearly necessary. Given that measurements are the sole means of extracting information, they play an indispensable role in nonadiabatic holonomic quantum computers. Accordingly, developing methods to reduce measurement errors in nonadiabatic holonomic quantum computers is of great importance. However, while much attention has been given to the research on nonadiabatic holonomic gates, the research on reducing measurement errors in nonadiabatic holonomic quantum computers is severely lacking. In this study, we propose a measurement error reduction method tailored for intermediate-scale nonadiabatic holonomic quantum computers. The reason we say this is because our method can not only reduce the measurement errors in the computer but also be useful in mitigating errors originating from nonadiabatic holonomic gates. Given these features,our method significantly advances the construction of accurate intermediate-scale nonadiabatic holonomic quantum computers.

关键词： quantum holonomy quantum computation measurement errors

Mitophagy in acute central nervous system injuries:regulatory mechanisms and therapeutic potentials

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第9期20卷 2437-2453页

作者： Siyi xu Junqiu Jia Rui Mao Xiang Cao Yun xu Department of Neurology Nanjing Drum Tower HospitalClinical College of Jiangsu UniversityNanjingJiangsu ProvinceChina Department of Neurology Nanjing Drum Tower HospitalChinese Academy of Medical Science&Peking Union Medical CollegeNanjingJiangsu ProvinceChina Department of Neurology Nanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjingJiangsu ProvinceChina State Key Laboratory of Pharmaceutical Biotechnology and Institute of Translational Medicine for Brain Critical Diseases Nanjing UniversityNanjingJiangsu ProvinceChina Jiangsu Key Laboratory for Molecular Medicine Medical School of Nanjing UniversityNanjingJiangsu ProvinceChina Nanjing Neurology Medical Center NanjingJiangsu ProvinceChina

Acute central nervous system injuries,including ischemic stro ke,intracerebral hemorrhage,subarachnoid hemorrhage,traumatic brain injury,and spinal co rd injury,are a major global health *** optimal therapies and improving the long-term neurological functions of patients with acute central nervous system injuries are urgent *** are susceptible to damage after acute central nervous system injury,and this leads to the release of toxic levels of reactive oxygen species,which induce cell ***,a selective form of autophagy,is crucial in eliminating redundant or damaged mitochondria during these *** evidence has highlighted the significant role of mitophagy in acute central nervous system *** this review,we provide a comprehensive overview of the process,classification,and related mechanisms of *** also highlight the recent developments in research into the role of mitophagy in various acute central nervous system injuries and drug therapies that regulate *** the final section of this review,we emphasize the potential for treating these disorders by focusing on mitophagy and suggest future research paths in this area.

关键词： autophagy intracerebral hemorrhage ischemic stroke mitochondria mitochondrial biogenesis mitochondrial quality control mitophagy spinal cord injury subarachnoid hemorrhage traumatic brain injury

Enantio-divergent C–H borylation with two different ligands from a single chiral source

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期 226-232页

作者： Rongrong Du Senmiao xu State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences College of Material Chemistry and Chemical Engineering Key Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of Education Hangzhou Normal University University of Chinese Academy of Sciences

Reported here is an iridium-catalyzed enantio-divergent C（sp3）–H borylation of α-gem-dimethyl groups of trifluoromethyl ketone-derived hydrazones to construct a series of acyclic all-carbon quaternary stereocenters with a high level of chiral induction. Two different chiral bidentate boryl ligands from a common chiral source not only can switch the enantioselectivity but also are complementary in terms of the substrate scope.

关键词：

同方期刊数据库

A surface engineering strategy for the stabilization of zinc metal anodes with montmorillonite layers toward long-life rechargeable aqueous zinc ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 94-105页

作者： Wenbo Wang Ruifeng xu xu Zhang Peiyu Wang Bao Yang Bingjun Yang Juan Yang Kailimai Su Pengjun Ma Yanan Deng Xianfeng Fan Wanjun Chen Key Laboratory for Electronic Materials College of Electrical Engineering Northwest Minzu University Resource Chemistry and Energy Materials Research Center State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Institute for Materials and Processes School of Engineering University of Edinburgh

Rechargeable aqueous zinc-ion batteries （AZIBs） exhibit appreciable potential in the domain of electrochemical energy ***,there are serious challenges for AZIBs,for instance zinc dendrite growth,hydrogen evolution reaction （HER）,and corrosion side ***,we propose a surface engineering modification strategy for coating the montmorillonite （MMT） layer onto the surface of the Zn anode to tackle these issues,thereby achieving high cycling stability for rechargeable *** results reveal that the MMT layer on the surface of the Zn anode is able to provide ordered zincophilic channels for zinc ions migration,facilitating the reaction kinetics of zinc *** functional theory（DFT） calculations and water contact angle （CA） tests prove that MMT@Zn anode exhibits superior adsorption capacity for Zn2+and better hydrophobicity than the bare Zn anode,thereby achieving excellent cycling ***,the MMT@Zn||MMT@Zn symmetric cell holds the stable cycling over 5600 h at 0.5 mA cm-2and 0.125 m A h cm-2,even exceeding 1800 h long cycling under harsh conditions of 5 m A cm-2and 1.25 m A h *** MMT@Zn||V2O5full cell reaches over 3000 cycles at 2 A g-1with excellent rate ***,this surface engineering modification strategy for enhancing the electrochemical performance of AZIBs represents a promising application.

关键词： Surface engineering strategy Montmorillonite layer Protection mechanism of Zn anode Cycling stability Aqueous zinc ion batteries

Inspires effective alternatives to backpropagation:predictive coding helps understand and build learning

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第11期20卷 3215-3216页

作者： Zhenghua xu Miao Yu Yuhang Song School of Health Sciences and Biomedical Engineering Hebei University of TechnologyTianjinChina Department of Computer Science University of OxfordOxfordUK

Artificial neural networks are capable of machine learning by simulating the hiera rchical structure of the human *** enable learning by brain and machine,it is essential to accurately identify and correct the prediction errors,referred to as credit assignment(Lillicrap et al.,2020).It is critical to develop artificial intelligence by understanding how the brain deals with credit assignment in neuroscience.

关键词： assignment learning enable