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Modifying temperature-related cardiovascular mortality through green-blue space exposure

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Environmental Science and Ecotechnology 2024年第4期20卷 269-277页

作者： Kejia Hu Shiyi Wang Fangrong Fei Jinglu Song Feng Chen Qi Zhao Yujie Shen Jingqiao Fu Yunquan Zhang Jian Cheng Jieming Zhong xuchao Yang Jiayu Wu School of Public Health Zhejiang UniversityHangzhou310058China Key Laboratory of Intelligent Preventive Medicine of Zhejiang Province Hangzhou310058China College of Agriculture and Biotechnology Zhejiang UniversityHangzhou310058China Zhejiang Provincial Center for Disease Control and Prevention Hangzhou310051China Department of Urban Planning and Design Xi'an Jiaotong-Liverpool UniversitySuzhou215123China Zhejiang Institute of Meteorological Sciences Hangzhou310008China School of Public Health Shandong UniversityJinan250012China Ocean College Zhejiang UniversityZhoushan316021China School of Public Health Wuhan University of Science and TechnologyWuhan430065China School of Public Health Anhui Medical UniversityHefei230032China

Green-blue spaces(GBS)are pivotal in mitigating thermal ***,their management lacks guidelines rooted in epidemiological evidence for specific planning and *** we show how various GBS types modify the link between non-optimal temperatures and cardiovascular mortality across different thermal *** merged fine-scale population density and GBS data to create novel GBS exposure index.A case time series approach was employed to analyse temperature-cardiovascular mortality association and the effect modifications of type-specific GBSs across 1085 subdistricts in south-eastern *** findings indicate that both green and blue spaces may significantly reduce high-temperature-related cardiovascular mortality risks(e.g.,for low(5%)***(95%)level of overall green spaces at 99th *** mortality temperature(MMT),Ratio of relative risk(RRR)=1.14(95%CI:1.07,1.21);for overall blue spaces,RRR=1.20(95%CI:1.12,1.29)),while specific blue space types offer protection against cold temperatures(e.g.,for the rivers at 1st vs MMT,RRR=1.17(95%CI:1.07,1.28)).Notably,forests,parks,nature reserves,street greenery,and lakes are linked with lower heat-related cardiovascular mortality,whereas rivers and coasts mitigate cold-related cardiovascular *** spaces provide greater benefits than green *** severity of temperature extremes further amplifies GBS's protective *** study enhances our understanding of how type-specific GBS influences health risks associated with non-optimal temperatures,offering valuable insights for integrating GBS into climate adaptation strategies for maximal health benefits.

关键词： Green space Blue space Temperature Mortality China

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砂土地震液化判别的支持向量机多分类模型

水力发电学报 2010年第3期29卷 191-195,201页

作者：师旭超韩阳河南工业大学土木建筑学院郑州450052

砂土地震液化判别对指导水利工程的设计和施工具有非常重要的意义。本文基于支持向量机分类算法,分析了影响砂土液化的主要因素,建立了砂土液化预测的支持向量机模型。在此模型中,选取地震烈度、标准贯入击数、平均粒径、相对密度和上... 详细信息

砂土地震液化判别对指导水利工程的设计和施工具有非常重要的意义。本文基于支持向量机分类算法,分析了影响砂土液化的主要因素,建立了砂土液化预测的支持向量机模型。在此模型中,选取地震烈度、标准贯入击数、平均粒径、相对密度和上覆有效压力5个指标作为主要评价影响因素,同时将液化程度划分为不液化、轻度液化、中等液化和严重液化4个等级,进而使其评判结果更为细化。以砂土地震实测数据作为学习样本进行训练,建立相应判别函数对待判样本进行分类。通过算例分析,表明文中方法对砂土液化评判的合理性与有效性,可以在实际工程中推广。

关键词：岩土力学多分类模型支持向量机地震液化预测

Amplified spontaneous emission at the band edges of Ag-coated Al nanocone array

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Photonics Research 2023年第12期11卷 2202-2209页

作者： YE XIANG YONGPING ZHAI JIAZHI YUAN KE REN xuchao ZHAO DONGDA WU JUNQIAO LA YI WANG WENXIN WANG College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China College of Physics and Optoelectronic Engineering Harbin Engineering UniversityHarbin 150001China Qingdao Innovation and Development Center of Harbin Engineering University Harbin Engineering UniversityQingdao 266500China

Surface lattice resonances(SLRs)with ultra-narrow linewidth(high quality factor)can enhance light–matter interactions at the nanoscale and modulate the propagating light from the emission wavelength direction to efficiency by photonic band ***,SLRs can serve as an excited candidate to enhance and,more importantly,modulate amplified spontaneous emission(ASE)with more optical ***,this work presents a system of two-dimensional Ag-coated Al nanocone array(Ag-NCA)packaged with Nile red,and a normal ASE with 15-fold enhancement is observed under external driving *** enhancement fades away,obviously,in the case of the off-normal condition,as the optical feedback evolves from the band edge steady state to the propagating *** ASE of this hybrid plasmonic system expands the possibilities of interaction between light and matter and has great promise for applications in nanolasing,super-resolution imaging,and photonic integration circuits.

关键词： band lasing driving

Vegetation change in the Mt. Qomolangma Nature Reserve from 1981 to 2001

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Journal of Geographical Sciences 2007年第2期17卷 152-164页

作者： ZHANG Wei ZHANG Yili WANG Zhaofeng DING Mingjun YANG xuchao LIN Xuedong LIU Linshan Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China Institute of Tibetan Plateau Research CAS Beijing 100085 China

Based on the NOAA AVHRR-NDVI data from 1981 to 2001, the digitalized China Vegetation Map （1：1,000,000）, DEM, temperature and precipitation data, and field investigation, the spatial patterns and vertical characteristics of natural vegetation changes and their influencing factors in the Mt. Qomolangma Nature Reserve have been studied. The results show that：（1） There is remarkable spatial difference of natural vegetation changes in the Mt. Qomolangma Nature Reserve and stability is the most common status. There are 5.04% of the whole area being seriously degraded, 13.19% slightly degraded, 26.39% slightly improved, 0.97% significantly improved and 54.41% keeping stable. The seriously and slightly degraded areas, which mostly lie in the south of the reserve, are along the national boundaries. The areas of improved vegetation lie in the north of the reserve and the south side of the Yarlung Zangbo River. The stable areas lie between the improved and degraded areas. Degradation decreases with elevation. （2） Degeneration in the Mt. Qomolangma Nature Reserve mostly affects shrubs, needle-leaved forests and mixed forests. （3） The temperature change affects the natural vegetation changes spatially while the integration of temperature changes, slopes and aspects affects the natural vegetation change along the altitude gradients. （4） It is the overuse of resources that leads to the vegetation degeneration in some parts of the Mt. Qomolangma Nature Reserve.

关键词： Mt. Qomolangma (Everest) nature reserve AVHRR vegetation degradation Himalayas

STARDUST INVESTIGATION INTO THE CR CHONDRITE GROVE MOUNTAIN 021710

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STARDUST INVESTIGATION INTO THE CR CHONDRITE GROVE MOUNTAIN ...

中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： xuchao ZHAO CIIRISTINE FLOSS YANGTING LIN MAITRAYEE BOSE Key Laboratory of the Earth's Deep Interior Institute of Geology and GeophysicsChinese Academy of Sciences Laboratory for Space Sciences and Physics Department Washington UniversityOne Brookings DriveSt.LouisMO 63130USA Department of Chemistry and Biochemistry Arizona State UniversityP.O.Box 871604TempeAZ 85287USA

We report the presolar grain inventory of the CR chondrite Grove Mountain 021710.A total of 35 C-anomalous grains(～236 ppm) and 112 O-anomalous grains(～189 ppm) were identified in situ using NanoSIMS ion imaging. Of 35 C-anomalous grains,28 were determined to be SiC grains by Auger *** of the SiC grains were subsequently measured for N and Si isotopes,allowing classification as one nova grain,one Y grain,one Z grain,and four mainstream ***-nine out of 112 O-anomalous grains belong to Group 1,indicating origins in low-to-intermediate-mass red giant and asymptotic giant branch ***-one are Group 4 grains and have origins in *** spectroscopic elemental measurements of 35 O-anomalous grains show that 33 of them are ferromagnesian *** have higher Mg/(Mg+Fe) ratios than those reported in other meteorites, suggesting a lower degree of alteration in the nebula and/or asteroid parent *** two oxide grains were identified,with stoichiometric compositions of MgAlO and SiO,*** presolar silicate/oxide ratio of GRV 021710 is comparable with those of the CR3 chondrites(QUE 99177 and MET 00426) and primitive interplanetary dust *** order to search for presolar sulfides,the meteorite was also mapped for S isotopes. However,no presolar sulfides were found,suggesting a maximum abundance of 2 *** scarcity of presolar sulfides may be due to their much faster sputtering rate by cosmic rays compared to silicates.

关键词： astrochemistry-circumstellar matter-novae cataclysmic variables-nuclear reactions nucleosynthesis abundances-stars:winds outflows-supernovae:general

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近场地震作用下基础隔震结构抗倾覆特性研究

近场地震作用下基础隔震结构抗倾覆特性研究

作者：徐超兰州理工大学

学位级别：硕士

基础隔震结构是指在建筑物的上部结构和基础之间通过设置隔震支座形成隔震层的一种隔震结构体系。夹层橡胶支座通过减小隔震层刚度，延长结构体系的自振周期、增大阻尼、减小传递到上部结构的地震能量，达到隔震的效果。基础隔震技术因... 详细信息

基础隔震结构是指在建筑物的上部结构和基础之间通过设置隔震支座形成隔震层的一种隔震结构体系。夹层橡胶支座通过减小隔震层刚度，延长结构体系的自振周期、增大阻尼、减小传递到上部结构的地震能量，达到隔震的效果。基础隔震技术因其良好的减震效果、经济性、耐久性和适用性，得到了国内外学术界和工程界的普遍认可。据统计，我国基础隔震结构的建筑面积已超过了200万平方米。基础隔震技术的应用和发展与隔震系统力学性能的研究及基础隔震结构地震响应分析理论的研究进程息息相关。近年来，我国发生了多次大地震，其中近场地震带来的灾害日益显著，由此引起了工程人员和专家学者的普遍关注。近场地震对建筑结构的影响在历次主要的近场地震中都有表现，如美国Northridge地震、日本Kobe地震、台湾集集地震以及汶川地震等。已有研究表明，近场地震的速度脉冲效应往往引起结构强烈的地震响应，增大对结构位移和延性需求，对于隔震结构这类中长周期结构会有较大影响。随着现代建筑的高速发展，高层建筑层出不穷，基础隔震结构也逐渐从低层建筑向多高层建筑发展，但随之产生了许多的设计问题，其中最重要的问题之一是结构的抗倾覆性能。为了更深入的研究基础隔震结构参数对结构抗倾覆性能的影响，并为工程应用提供基本的理论依据和设计参考，本文通过力学分析并应用SAP2000有限元软件，以铅芯橡胶支座基础隔震结构非线性地震响应分析为基础，分析了场地条件、地震烈度、隔震周期、上部结构自振周期、上部结构高宽比、近场地震速度脉冲效应等因素对结构抗倾覆特性的影响及其规律，为从事近场地区基础隔震体系设计和应用的广大工程设计人员提供基本理论依据和参考。

关键词：基础隔震抗倾覆比近场地震动速度脉冲

基于叠前AVO同步反演的特低渗储层流体性质识别方法及其应用——以大庆长垣敖南鼻状构造敖158井区为例

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大庆石油地质与开发 2021年第4期40卷 137-144页

作者：何谞超大庆油田有限责任公司第七采油厂黑龙江大庆163517

特低渗岩性油藏具有储层薄、与围岩阻抗差异小、油水分布横向变化快、流体响应特征不明显的特点,导致常规叠前阻抗反演方法对流体性质识别精度不高。利用叠前AVO同步反演获取拉梅阻抗、剪切阻抗数据体,结合拉梅阻抗—剪切阻抗油水层交... 详细信息

特低渗岩性油藏具有储层薄、与围岩阻抗差异小、油水分布横向变化快、流体响应特征不明显的特点,导致常规叠前阻抗反演方法对流体性质识别精度不高。利用叠前AVO同步反演获取拉梅阻抗、剪切阻抗数据体,结合拉梅阻抗—剪切阻抗油水层交会定量识别图版,建立了一套特低渗储层流体性质识别方法,并将其应用于松辽盆地大庆长垣敖南鼻状构造敖158井区扶余油层特低渗油水层识别中。结果表明:拉梅阻抗与剪切阻抗交会可消除岩石骨架参数的影响,突显出孔隙流体响应,可最大限度体现流体性质,适合于特低渗岩性油藏储层孔隙流体性质的识别。

关键词：叠前AVO同步反演特低渗储层油水层识别拉梅阻抗剪切阻抗

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松软煤层煤巷掘进条带瓦斯治理技术研究

矿业安全与环保 2020年第3期47卷 92-95页

作者：黄旭超中煤科工集团重庆研究院有限公司重庆400037

为提高煤巷掘进条带瓦斯治理效果,通过在新疆艾维尔沟矿区2130煤矿4号煤层24223运输巷开展基于定向长钻孔治理煤巷条带瓦斯的水力压裂试验,考察瓦斯治理效果。试验结果表明:相比于传统瓦斯治理手段,定向长钻孔高压水力压裂技术平均抽采... 详细信息

为提高煤巷掘进条带瓦斯治理效果,通过在新疆艾维尔沟矿区2130煤矿4号煤层24223运输巷开展基于定向长钻孔治理煤巷条带瓦斯的水力压裂试验,考察瓦斯治理效果。试验结果表明:相比于传统瓦斯治理手段,定向长钻孔高压水力压裂技术平均抽采瓦斯浓度和平均抽采瓦斯纯流量分别提升了2.4倍和4.0倍,抽采达标经济成本和时间成本分别降低了80%和67%,可以有效提高煤巷条带瓦斯治理效果,降低瓦斯治理成本。

关键词：定向长钻孔水力压裂煤巷掘进条带瓦斯治理

新零售下K公司生鲜品冷链物流末端配送服务质量评价研究

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新零售下K公司生鲜品冷链物流末端配送服务质量评价研究

作者：徐超成都理工大学

学位级别：硕士

近些年来,在互联网、大数据和移动设备等信息技术的创新引导和迅速推动下,伴随“新零售”元素和业态的爆发,我国生鲜电商市场得以快速发展。生鲜农产品的即时消费成为了电子商务行业的后起之秀,新零售与生鲜相结合的发展模式获得了业界... 详细信息

近些年来,在互联网、大数据和移动设备等信息技术的创新引导和迅速推动下,伴随“新零售”元素和业态的爆发,我国生鲜电商市场得以快速发展。生鲜农产品的即时消费成为了电子商务行业的后起之秀,新零售与生鲜相结合的发展模式获得了业界人士的重视和探讨。但是,生鲜品作为性质特殊类产品,对冷链物流和末端配送环节都有着较高的要求。作为一些B2C电子商务企业,生鲜业务在城市实际化运营中,加强冷链物流建设的同时,冷链末端配送服务也暴露出了诸多问题,如生鲜订单无区分优先配送、即时配送不及时、增值服务不完善、站点操作不当导致商品变质和消费投诉等问题发生,片区消费体验较差。因此,企业要想在市场上占有一席之地,应该从用户全方位需求出发,及时把握消费者满意,寻求一种更为高效的生鲜品配送管理服务,改进传统配送中不匹配“新零售”发展的问题,从而更好地完成与消费者的产品交付能力,这与企业长期发展起着举足轻重的作用。基于以上背景,本文选取K公司作为研究对象,以成都片区作为研究区域,通过对该公司生鲜品冷链物流末端配送服务质量评价研究,探讨电商如何在新零售模式下提升生鲜品的配送服务质量。首先,对K公司的生鲜品冷链物流和末端配送服务现状进行了介绍,整合生鲜品在“线上自营平台业务”和“线下门店超市业务”的发展,阐述了配送流程、模式和服务特点等,对实际发现的问题作了说明。其次,在此基础上,分析新零售下行业特征、配送服务参考指标及公司潜在问题等,对该公司生鲜品配送服务质量评价的指标初始选取。其次,对初始指标进行筛选、信度与效度检验和调整分析,采用多目标决策—层次分析法(AHP),构建了适用于新零售下K公司生鲜品配送服务质量的评价指标体系。再者,结合末端配送的调研数据,引入决策与评价实验室法(DEMATEL)和模糊综合评判法建立模型并计算。通过纵向和横向比较,对评价结果中的薄弱因素和问题加以分析,从三个方面为该公司在成都片区下,生鲜品配送服务质量的提升给予改善建议。最后,对文章的研究内容做出了总结,归纳不足之处。本文的研究,将会对K公司城市运营下的生鲜品配送服务的长期发展带来积极效益,并为消费者更好选择新零售生鲜电商提供依据。最终,实现新零售平台、K公司生鲜品配送服务发展和消费者购物实感达到良性循环,均能受益。

关键词：新零售生鲜配送质量评价模糊AHP-DEMATEL