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中国城市多元供给对人口跨市流动的影响

经济地理 2024年第7期44卷 68-77页

作者：李卓伟王士君赵梓渝施响赵远飞东北师范大学地理科学学院中国吉林长春130024 东北师范大学长白山地理过程与生态安全教育部重点实验室中国吉林长春130024 青岛大学旅游与地理科学学院中国山东青岛266071 吉林大学行政学院中国吉林长春130015

城市之间的供给不平衡会促使人口为满足自身的需求向其他城市流动。改革开放初期,人口对经济发展的需求和城市劳动力市场的供给是人口与城市间主要的供需关系。当个人劳动所得收入满足个人或家庭的生产、投资、基础消费、基础保障后,人... 详细信息

城市之间的供给不平衡会促使人口为满足自身的需求向其他城市流动。改革开放初期,人口对经济发展的需求和城市劳动力市场的供给是人口与城市间主要的供需关系。当个人劳动所得收入满足个人或家庭的生产、投资、基础消费、基础保障后,人口的需求开始多元化,城市的消费娱乐、景观、交通等要素的供给能力也会对人口流动产生推拉作用力。文章利用腾讯位置大数据构建人口跨市流动网络,运用QAP回归模型,分析城市多元供给要素对人口流动的影响,并对人口流动的层级异质性和时间异质性进行解析。研究发现:①铁路交通、餐饮娱乐和经济供给是影响城市间人口流动的主要因素,景观供给对时间选择富有敏感性;②流动群体对不同层级城市的需求不尽相同,金融要素存在层级为单位的边际递减效应,餐饮娱乐和铁路交通供给并未表现出明显的层级异质性;③人口流动存在时间异质性,假期期间,景观供给对人口流动呈现出显著正效应,经济供给的显著性水平明显降低。

关键词：多元供给人口流动交通异质性特征层级结构大数据

乡村振兴视域下农村人力资源培训的困境与对策——以陕南为例

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陕西理工大学学报（社会科学版） 2024年第4期42卷 13-19页

作者：李卓威卢阳李强王蕴陕西理工大学陕西汉中723000 国家税务总局税务干部学院(大连) 辽宁大连116023

推动乡村振兴,加快农业强国建设,不仅要通过产业政策实现乡村振兴,更要立足农民、农村基层干部,不断从思想、理念、技术和能力上适应农业新质生产力需求,实现农村“自我造血”。因此,加强农村人力资源培训,提升农民和农村基层干部的综... 详细信息

推动乡村振兴,加快农业强国建设,不仅要通过产业政策实现乡村振兴,更要立足农民、农村基层干部,不断从思想、理念、技术和能力上适应农业新质生产力需求,实现农村“自我造血”。因此,加强农村人力资源培训,提升农民和农村基层干部的综合素质,是增强脱贫地区内生发展动力、加快推进乡村振兴与农业强国建设的重要举措。通过对陕南农村的调研发现,农村人力资源培训存在培训形式单一、师资储备与培训需求不匹配、培训课程内容结构不够优化、农村基层干部人力资源培训机制亟待优化等现实问题。为此,提出加快推进“区块链+乡村振兴”信息管理系统建设、加强农村人力资源培训师资队伍建设、优化农村人力资源培训的内容与方式、完善农村基层干部人力资源培训机制等具体对策与建议,以不断提升农民综合技能和基层干部治理能力,加快推进乡村振兴与农业强国建设。

关键词：乡村振兴农村人力资源培训乡村治理能力内生发展动力

智能技术赋能中小学信息科技课程建设——第14届中小学信息技术教育研讨会综述

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中国教育信息化 2024年第7期30卷 95-104页

作者：胡艺龄李卓威朱成丹华东师范大学教育学部上海200062 华东师范大学教育学部教育信息技术学系上海200062

2022年11月26—28日,中国教育学会中小学信息技术教育专业委员会2022年年会暨第14届中小学信息技术教育研讨会在上海召开。论坛以“教育数字化转型时代,信息技术支持的教学创新”为主题,旨在探讨智能技术在教育教学中的角色,以及新课标... 详细信息

2022年11月26—28日,中国教育学会中小学信息技术教育专业委员会2022年年会暨第14届中小学信息技术教育研讨会在上海召开。论坛以“教育数字化转型时代,信息技术支持的教学创新”为主题,旨在探讨智能技术在教育教学中的角色,以及新课标对技术与课程整合的要求。论坛议程包括主旨报告、专题报告、区域经验分享等环节,涵盖小学、初中、高中、跨学科与AI教育应用等四个分论坛。在主旨报告中,多位专家学者从不同角度阐述了智能技术在教育中的应用。智能技术可以提供更高效、个性化的教学方式,帮助学生提高学习效果。同时,智能技术也可以帮助教师更好地了解学生的学习情况,从而调整教学策略。专题报告介绍了智能技术在不同学科中的应用案例,展示了如何利用智能技术来辅助课堂教学、提高学生的学习效果。在区域经验分享环节,来自不同地区的教师分享了在教学中应用智能技术的经验;介绍了如何利用智能技术来辅助教学、提高教学效果。论坛展示了智能技术在教育教学中的应用成果,为教育数字化转型提供了有益的参考。

关键词：教育数字化转型信息科技课程智能技术信息技术新课标

我国2019—2023年登革热报告病例流行病学特征

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中国热带医学 2024年第8期24卷 925-930页

作者：李卓威黄晓霞田婷婷李阿茜杜珊珊何广学李建东传染病溯源预警与智能决策全国重点实验室国家卫生健康委员会生物安全重点实验室医学病毒和病毒病重点实验室中国疾病预防控制中心病毒病预防控制所北京102206 滨州医学院公共卫生学院山东烟台264003

目的分析我国2019—2023年登革热报告病例的流行病学特征,为登革热防控工作提供科学依据。方法利用Joinpoint回归、SaTScan及ArcGIS等软件对中国疾病预防控制信息系统(NNDRS)中报告的登革热病例数时间、空间和人间分布特征及发展趋势进... 详细信息

目的分析我国2019—2023年登革热报告病例的流行病学特征,为登革热防控工作提供科学依据。方法利用Joinpoint回归、SaTScan及ArcGIS等软件对中国疾病预防控制信息系统(NNDRS)中报告的登革热病例数时间、空间和人间分布特征及发展趋势进行分析。结果我国2019—2023年共报告病例43095例,平均报告发病率为0.61/10万,年报告发病率波动显著(AAPC=-3.16%,95%CI:-54.16%~91.47%),主要集中在2019年和2023年,约占近5年总报告病例数的96.83%。各年龄组人群均可发病,30~<40岁年龄组病例占22.6%。全年均有病例发生,6月份开始快速上升,高峰期集中在8—10月份,为34780例(RR=12.44,LLR=29262.52,P<0.05)。疫情特征以输入引发本地传播为主,输入病例主要来源于东南亚地区(占86.56%),其中柬埔寨3284例(占46.11%)、缅甸1851例(占25.99%)为病例主要来源国家。不同年份有显著不同,西南地区、华南地区、华东地区发生本地传播疫情风险高,高发地区主要分布在云南和广东,疫情高峰期持续时间受本地传播疫情早期及时性发现影响,疫情峰值与有防控措施落实有效性有关,疫情规模受境外输入压力和本地疫情防控措施落实能力影响。结论随着全球登革热传播日益上升的趋势,我国发生登革热本地传播疫情风险增加,宜加强早期疫情主动监测和做好本地传播疫情发生后预防控制方案、人员、技术和物质的准备,因地制宜探索跨境流动人员的管理,及时进行风险评估,有效降低输入引发本地传播疫情风险。

关键词：登革热流行病学特征发病时空分析境外输入中国

Overcoming Perovskite Corrosion and De-Doping Through Chemical Binding of Halogen Bonds Toward Efficient and Stable Perovskite Solar Cells

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Nano-Micro Letters 2022年第11期14卷 62-74页

作者： Guanhua Ren Wenbin Han Qiang Zhang zhuowei li Yanyu Deng Chunyu liu Wenbin Guo State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin University2699 Qianjin StreetChangchun 130012People’s Republic of China

4-tert-butylpyridine(TBP)is an indispensable additive for the hole transport layer in highly efficient perovskite solar cells(PSCs),while it can induce corrosion decomposition of perovskites and de-doping effect of spiro-OMeTAD,which present huge challenge for the stability of ***,halogen bonds provided by 1,4-diiodotetrafluorobenzene(1,4-DITFB)are employed to bond with TBP,simultaneously preventing perovskite decomposition and eliminating de-doping effect of oxidized *** characterizations have proved strong chemical interaction forms between 1,4-DITFB and *** the incorporation of halogen bonds,perovskite film can maintain initial morphology,crystal structure,and light absorbance;meanwhile,the spiro-OMeTAD film shows a relatively stable conductivity with good charge transport ***,the device with TBP complex exhibits significantly enhanced stability in N_(2) atmosphere or humidity ***,a champion power conversion efficiency of 23.03%is obtained since perovskite is no longer damaged by TBP during device *** strategy overcomes the shortcomings of TBP in n-i-p PSCs community and enhances the application potential of spiro-OMeTAD in fabricating efficient and stable PSCs.

关键词： 4-tert-butylpyridine Corrosion De-doping Chemical binding Stability

Recent advances in Pb-Sn mixed perovskite solar cells

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Journal of Energy Chemistry 2022年第10期31卷 615-638,I0015页

作者： Yanyu Deng Guanhua Ren Danao Han Wenbin Han zhuowei li Chunyu liu Wenbin Guo State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012JilinChina

Organic-inorganic hybrid lead-tin perovskite solar cells(Pb-Sn PSCs)have attracted much attention because of their advantages of low toxicity,variable bandgap,and feasibility for all-perovskite tandem solar cells,and the current power conversion efficiency(PCE)has exceeded 23%.However,due to the rambunctious crystallization process,easily oxidized Sn(Ⅱ)and inadequate energy level arrangement,there are many defects in perovskite films resulting in serious carrier recombination,which makes PCE still lag Pb-based *** quality of perovskite films is an important factor affecting the overall device *** selection and optimization of transport layers not only determines the interface energy level arrangement but also affects the carrier *** this paper,the research progress in improving performance of Pb-Sn PSCs in recent years is reviewed from aspects of perovskite layer and transport *** profound understanding of different promotion methods is summarized as *** results have certain guiding significance for the future development and commercial application of Pb-Sn PSCs.

关键词： Pb-Sn mixed perovskite solar cells Crystallinity Charge transport layer Passivation Additive

Mycorrhizas Affect Polyphyllin Accumulation of Paris polyphylla *** through Promoting PpSE Expression

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Phyton-International Journal of Experimental Botany 2021年第5期90卷 1535-1547页

作者： Hailing li lingfeng Xu zhuowei li Shunxin Zhao Dongqin Guo Lu Rui Nong Zhou Chongqing Engineering Laboratory of Green Planting and Deep Processing of Famous-Region Drug in the Three Gorges Reservoir Region College of Biology and Food EngineeringChongqing Three Gorges UniversityChongqing404120China College of Pharmaceutical Sciences Dali UniversityDali671000China

Paris polyphylla *** is a traditional Chinese medicinal plant,in which polyphyllin as the main medicinal component is an important secondary metabolite with *** mycorrhizal fungi(AMF)have multiple positive effects on plants,while it is not clear whether AMF increase the content of medicinal components in medicinal *** this study,a total of nine AMF treatments were laid to analyze the mycorrhizal effect on polyphyllin accumulation and PpHMGR and PpSE expression of *** *** increased the content of polyphyllin in the cultivated variety with low relation to the increase of inoculation *** I,II,and VII were identified and partly improved by AMF inoculation,dependent on AMF treatments and culture ***,the PpHMGR and PpSE expression was induced by mycorrhization,dependent on AMF species,whilst the induction was more obvious in PpSE than in PpHMGR after *** concluded that the symbiotic relationship between *** *** and AMF increased polyphyllin content level in the plant,which was associated with the up-regulation of PpSE transcripts.

关键词： Paris polyphylla var.yunnanensis Arbuscular mycorrhizal fungi Polyphyllin 3-hydroxy-3-methylglutaryl CoA reductase(HMGR) squalene epoxidase(SE)

TiO^(2)electron transport bilayer for all-inorganic perovskite photodetectors with remarkably improved UV stability toward imaging applications

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Journal of Materials Science & Technology 2021年第16期75卷 39-47页

作者： Ye Yuan Zhong Jia Genghua Yan zhuowei li Jinliang li Min Kuang Bangqi Jiang Longlong Zeng likun Pan Wenjie Mai Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhouGuangdong 510632China Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Jinan University.GuangzhouGuangdong 510632China Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal University3663 N.Zhongshan Rd.Shanghai200062China Guangdong Institute of New Materials Guangdong Academy of SciencesGuangzhou510650China Institute of Solar Energy Systems Guangdong Provincial Key Laboratory of Photovoltaic TechnologySchool of PhysicsSun Yat-sen UniversityGuangzhou510006China

High ultraviolet(UV)stability and low dark current(Idark)are necessary for high-quality perovskite photodetectors(PDs).TiO^(2)thin film is known as effective electron-transport-layer(ETL)for perovskite ***,common spin-coated TiO^(2)ETLs endow many surface defects and have strong UV photocatalytic effect to decompose perovskite materials,resulting in inferior stability of *** this work,TiO^(2)bilayer film(Bi-TiO^(2))has been fabricated by combining spin-coating and atomic-layer-deposition process and its positive effects on UV stability and Idarkof Cs2 AgBiBr6-based PDs have been revealed for the first *** is demonstrated that Bi-TiO^(2)possesses fewer surface defects and smoother morphology with type II band alignment,which is beneficial to suppress photocatalytic activity of TiO^(2)and reduce carrier recombination at the *** accelerated strong UV aging treatment,the PD with Bi-TiO^(2)maintains excellent performance,whereas the PD with spin-coated TiO^(2)film dramatically deteriorate with on-off ratio drops from~102 to~***,the Idarkof PD remarkably decreases from~10^(-8) A to~10^(-10) A after bilayer ***,we have integrated the corresponding PDs into a self-built imaging system adopting diffuse reflection *** work suggests a feasible approach to fabricate TiO^(2)/Cs2 AgBiBr6-based PDs with remarkable UV tolerance for imaging applications.

关键词： TiO_(2)bilayer film All-Iinorganic perovskite Photodetector UV stability Atomic-layer-deposition Reflective imaging

Recent process of plasma effect in organic solar cells

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Journal of Energy Chemistry 2021年第1期30卷 181-190,I0006页

作者： Mei Wang Shuo Han Wei Wu zhuowei li Guanhua Ren Chunyu liu Wenbin Han liang Shen Wenbin Guo State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012JilinChina College of Materials Science and Engineering Jilin UniversityChangchun 130012JilinChina

Due to the compromise between exciton diffusion length and light absorption, the active layer thickness of organic solar cells(OSCs) is limited. As we all know, embedding metal nanostructures into OSCs can improve the performance of OSCs by triggering surface plasma resonance, scattering, and other effect without increasing the physical thickness of light trapping layer. Besides, the plasma response and other roles will distinguish when metal nanostructures are embedded into different position of OSCs, which are equally important to the performance of OSCs. In this paper, the enhancement mechanisms of various metal nanostructures in different layers of OSCs are summarized from the electricity and optics *** review also further highlights the progress of plasma effect and their working mechanism in OSCs,and it is expected to provide more perspective of plasma effect for performance enhancement of OSCs.

关键词： Plasma effect Organic solar cells Metal nanostructures Scattering effect light absorption