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Spin logic devices based on negative differential resistance -enhanced anomalous Hall effect

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1437-1448页

作者： Hongming Mou ziyao Lu Yuchen Pu Zhaochu Luo Xiaozhong zhang Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China

Owing to rapid developments in spintronics,spin-based logic devices have emerged as promising tools for next-generation computing *** paper provides a comprehensive review of recent advancements in spin logic devices,particularly focusing on fundamental device concepts rooted in nanomagnets,magnetoresistive random access memory,spin–orbit torques,electric-field modu-lation,and magnetic domain *** operation principles of these devices are comprehensively analyzed,and recent progress in spin logic devices based on negative differential resistance-enhanced anomalous Hall effect is *** devices exhibit reconfigur-able logic capabilities and integrate nonvolatile data storage and computing *** current-driven spin logic devices,negative differential resistance elements are employed to nonlinearly enhance anomalous Hall effect signals from magnetic bits,enabling reconfig-urable Boolean logic ***,voltage-driven spin logic devices employ another type of negative differential resistance ele-ment to achieve logic functionalities with excellent cascading *** cascading several elementary logic gates,the logic circuit of a full adder can be obtained,and the potential of voltage-driven spin logic devices for implementing complex logic functions can be *** review contributes to the understanding of the evolving landscape of spin logic devices and underscores the promising pro-spects they offer for the future of emerging computing schemes.

关键词： spin logic spin–orbit torque negative differential resistance full-adder

甘肃省农产品物流运输的影响因素分析——基于灰色关联和聚类分析

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物流科技 2024年第13期47卷 66-70页

作者：杨芳张自尧黄倩倩马国亮甘肃农业大学管理学院甘肃兰州730070

物流运输对农产品发展具有重要作用。文章基于甘肃省2015—2021年物流运输相关数据,从社会发展水平、农产品产出水平、物流基础设施水平和物流规模水平四个维度构建农村物流运输发展状况的评价指标体系,利用灰色关联和聚类分析法,分析... 详细信息

物流运输对农产品发展具有重要作用。文章基于甘肃省2015—2021年物流运输相关数据,从社会发展水平、农产品产出水平、物流基础设施水平和物流规模水平四个维度构建农村物流运输发展状况的评价指标体系,利用灰色关联和聚类分析法,分析影响甘肃省农产品物流运输的因素,结果表明货运周转量对农产品物流运输的影响最大,邮路及农村投递线路总长度对物流运输的影响最小。并根据聚类分析结果提出建议,对推动甘肃省农产品物流运输发展具有借鉴意义。

关键词：甘肃省物流运输影响因素灰色关联分析聚类分析

Multifunctional inorganic nanomaterials for cancer photoimmunotherapy

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Cancer Communications 2022年第2期42卷 141-163页

作者： Lu Tang Aining zhang ziyao zhang Qingqing Zhao Jing Li Yijun Mei Yue Yin Wei Wang State Key Laboratory of Natural Medicines Department of PharmaceuticsSchool of PharmacyChina Pharmaceutical UniversityNanjingJiangsuP.R.China National Medical Products Administration Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients China Pharmaceutical UniversityNanjingJiangsuP.R.China

Phototherapy and immunotherapy in combination is regarded as the ideal ther-apeutic modality to treat both primary and metastatic ***-apy uses different immunological approaches to stimulate the immune system to identify tumor cells for targeted *** destroys the pri-mary tumors by light irradiation,which induces a series of immune responses through triggering immunogenic cancer cell ***,when integrat-ing immunotherapy with phototherapy,a novel anti-cancer strategy called pho-toimmunotherapy(PIT)is *** synergistic treatment modality can not only enhance the effectiveness of both therapies but also overcome their inherent limitations,opening a new era for the current anti-cancer ***,the advancement of nanomaterials affords a platform for *** all these nanomaterials,inorganic nanomaterials stand out as idealmediators in PIT due to their unique physiochemical *** nanomaterials can not only serve as carriers to transport immunomodulatory agents in immunotherapy owing to their excellent drug-loading capacity but also function as photother-mal agents or photosensitizers in phototherapy because of their great optical *** this review,the recent advances of multifunctional inorganic nanomaterial-mediated drug delivery and their contributions to cancer PIT will be highlighted.

关键词： biodegradability cancer photoimmunotherapy immune stimulation inorganic nanomaterial nanoparticles targeted drug delivery

热带地区叶下株内生菌的分离筛选和抑菌活性研究

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黑龙江科学 2024年第12期15卷 123-125页

作者：倪骋郭泽辉赵婕张子瑶杨涛王英海南医学院病原生物学与免疫学实验室海口571199

为挖掘具有生物学活性的内生菌资源,给临床新型药物研究提供更多的筛选源,采用组织分离技术和划线法,从海南地区的新鲜叶下珠中分离纯化内生菌,通过试管梯度稀释法测定内生菌对大肠埃希菌、金黄色葡萄球菌、白假丝酵母菌等常见病原菌的... 详细信息

为挖掘具有生物学活性的内生菌资源,给临床新型药物研究提供更多的筛选源,采用组织分离技术和划线法,从海南地区的新鲜叶下珠中分离纯化内生菌,通过试管梯度稀释法测定内生菌对大肠埃希菌、金黄色葡萄球菌、白假丝酵母菌等常见病原菌的抑菌活性。结果显示,从叶下珠中分离得到13株菌,其中YXZ-10对大肠埃希菌具有良好的抑菌效果,说明海南地区叶下株内生菌资源丰富,部分具有抑菌活性。

关键词：叶下株内生菌抑菌作用

Taxonomy of Two New Peritrich Ciliates(Protozoa:Ciliophora)from Inland Saltwaters of China

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Journal of Ocean University of China 2024年第3期23卷 811-821页

作者： YU Ying zhang Yong LIANG ziyao LI Jiqiu LIN Xiaofeng Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems Fujian Provincial Key Laboratory of Coastal Ecology and Environmental StudiesCollege of the Environment and EcologyXiamen UniversityXiamen 361102China School of Life Science South China Normal UniversityGuangzhou 510631China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361102China

The inland saltwater lakes harbor exceptional ***,two new species of solitary sessile peritrich ciliates were isolated from Qinghai Lake,the largest inland saltwater lake in *** morphology,ciliature,silverline system,and molecular phylogeny were investigated based on live observation,silver staining,and analysis of the small subunit ribosomal DNA(SSU rDNA).Vorticella paraglobosa *** characterized mainly by its obconical or elongate bell-shaped zooid,C-shaped macronucleus,single ventrally located contractile vacuole,two-rowed infundibular polykinety 3,and 28-38 silverlines between peristome and aboral tro-chal band and 10-15 between aboral trochal band and *** cotyliformis *** from its congeners mainly by its double-layered peristomial lip,cup-shaped zooid,J-shaped macronucleus,single ventrally positioned contractile vacuole,three-rowed infundibular polykinety 3,and 70-85 silverlines between peristome and aboral trochal band and 21-25 between aboral trochal band and *** SSU rDNA sequences of the two new species were obtained,and the subsequent molecular phylogenetic analysis supported their taxonomic classification.

关键词： molecular phylogeny morphology new species Qinghai Lake taxonomy

本科实习护生死亡态度和生命意义感对安宁疗护态度影响的路径分析

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中华现代护理杂志 2024年第7期30卷 848-854页

作者：宇寰胡燕王路朱宇宋江艳高雨霏郁贤竹张子姚安徽医科大学护理学院基础护理学教研室合肥230601 安徽中医药大学护理学院临床护理系健康与康复护理学教研室合肥230012 安徽医科大学临床医学院护理系临床教研室合肥230031

目的:探讨本科实习护生死亡态度和生命意义感对安宁疗护态度的影响路径。方法:本研究为横断面研究。采用便利抽样法,于2022年10?-12月选取安徽省合肥市2所学校的229名本科实习护生为研究对象。采用一般资料调查表、中文版佛罗梅尔特临... 详细信息

目的:探讨本科实习护生死亡态度和生命意义感对安宁疗护态度的影响路径。方法:本研究为横断面研究。采用便利抽样法,于2022年10?-12月选取安徽省合肥市2所学校的229名本科实习护生为研究对象。采用一般资料调查表、中文版佛罗梅尔特临终关怀态度B量表、中文版死亡态度描绘量表、中文版生命意义感量表对本科实习护生进行问卷调查。采用Pearson相关分析探讨本科实习护生死亡态度、生命意义感、安宁疗护态度的相关性,并运用结构方程模型检验死亡态度、生命意义感对安宁疗护态度影响的路径关系。结果:本研究共发放问卷229份,回收有效问卷214份,问卷有效回收率为93.45%(214/229)。214名本科实习护生中文版佛罗梅尔特临终关怀态度B量表得分为(101.06±8.16)分、中文版死亡态度描绘量表得分为(91.21±12.13)分、中文版生命意义感量表得分为(94.45±11.90)分。Pearson相关分析结果显示,生命意义感与安宁疗护态度呈正相关( r=0.290, P<0.01),死亡态度与安宁疗护态度呈负相关( r=-0244, P<0.01)。结构方程模型路径分析结果显示,生命意义感(生活目标、生活态度)可通过死亡态度(逃离接受、自然接受、死亡恐惧)影响安宁疗护态度。结论:对本科实习护生的生命意义感及死亡态度进行有效干预能够改善其安宁疗护态度。

关键词：学生护理安宁疗护态度死亡态度生命意义感死亡恐惧逃离接受

解构重组:从头构建羟基取代苯并呋喃的新策略

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有机化学 2020年第6期40卷 1790-1791页

作者：张梓曜焦宁北京大学天然药物及仿生药物国家重点实验室北京100191

羟基取代苯并呋喃是一种广泛存在于天然产物和生物活性分子中的结构.目前,官能团化苯并呋喃的合成通常使用两种策略:(1)过渡金属催化的sp^2碳氢键官能团化;(2)通过环化反应构建苯环或呋喃环.这两种策略都存在一定的局限性.碳氢键官能团... 详细信息

羟基取代苯并呋喃是一种广泛存在于天然产物和生物活性分子中的结构.目前,官能团化苯并呋喃的合成通常使用两种策略:(1)过渡金属催化的sp^2碳氢键官能团化;(2)通过环化反应构建苯环或呋喃环.这两种策略都存在一定的局限性.碳氢键官能团化是一种强大的策略,近年来发展出多种导向基协助的吲哚4~7位的碳氢键官能团化反应^[1].

关键词：苯并呋喃碳氢键官能团化呋喃环过渡金属催化天然产物生物活性分子环化反应两种策略

The quality traceability system for prefabricated buildings using blockchain:An integrated framework

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Frontiers of Engineering Management 2020年第4期7卷 528-546页

作者： ziyao zhang Zhenmin YUAN Guodong NI Han LIN Yujie LU Institute of Project Management School of Mechanics and Civil EngineeringChina University of Mining and TechnologyXuzhou 221116China School of Information Engineering Jiangsu Key Laboratory of Auditing Information EngineeringNanjing Audit UniversityNanjing 211815China Department of Building Engineering College of Civil EngineeringKey Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of EducationShanghai Institute of Intelligent Science and TechnologyTongji UniversityShanghai 200092China

The quality traceability of precast components has largely affected the widespread adoption of prefabricated *** technology provides an effective solution to change the centralized storage mode of traditional traceability system and its related *** this paper,we propose a framework of quality traceability system for precast components based on blockchain *** system framework adopts a hybrid blockchain architecture and dual storage mode,defines three types of smart contracts,and creates an interactive and efficient source tracing query method,which could effectively achieve the goals of decentralization,openness,and non-tamperability,as well as efficient traceability.

关键词： quality traceability precast components blockchain framework

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事件研究法的实现、问题和拓展

数量经济技术经济研究 2023年第9期40卷 71-92页

作者：张子尧黄炜中南财经政法大学财政税务学院、收入分配与现代财政学科创新引智基地北京大学国家发展研究院

事件研究法是一种广泛应用于社会科学各领域的因果推断和政策评估工具。近年来事件研究法通常与双重差分法搭配使用,用于检验平行趋势假设和政策动态因果效应。本文结合前沿理论计量研究成果,试图对事件研究法进行系统性的归纳梳理,以... 详细信息

事件研究法是一种广泛应用于社会科学各领域的因果推断和政策评估工具。近年来事件研究法通常与双重差分法搭配使用,用于检验平行趋势假设和政策动态因果效应。本文结合前沿理论计量研究成果,试图对事件研究法进行系统性的归纳梳理,以厘清事件研究法在实践中需要注意的一些问题。本文梳理了事件研究法的历史发展脉络,详细展示事件研究法的实现方式、识别假设以及其与双重差分法之间的紧密联系。本文归纳分析了事件研究法实践中可能会面临的一些常见问题,包括基期选择、平行趋势检验、数据归并和截断、控制组间时间趋势差异等问题的影响和应对方法。本文还详细分析了异质性处理效应情形下的事件研究法估计偏误来源、修正思路、平行趋势检验等问题。

关键词：事件研究法动态双重差分法双向固定效应模型异质性处理效应