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Anthropogenic warming is a key climate indicator of rising urban fire activity in China

National Science Review 2024年第5期11卷 110-120页

作者： Qichao Yao Dabang Jiang ben zheng Xiaochun Wang Xiaolin Zhu Keyan Fang Lamei Shi Zhou Wang Yongli Wang Linhao Zhong Yanyan Pei Amy Hudson Shuai Xu Maowei Bai Xinyan Huang Valerie Trouet National Institute of Natural Hazards Ministry of Emergency Management of China Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education School of Forestry Northeast Forestry University Laboratory of Tree-Ring Research University of Arizona Institute of Atmospheric Physics Chinese Academy of Sciences Department of Statistics Colorado State University Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic University Key Laboratory of Humid Subtropical Eco-Geographical Process (MOE) College of Geographic Sciences Fujian Normal University Department of Building Environment and Energy Engineering The Hong Kong Polytechnic University

China, one of the most populous countries in the world, has suffered the highest number of natural disaster-related deaths from fire. On local scales, the main causes of urban fires are anthropogenic in ***, on regional to national scales, little is known about the indicators of large-scale co-varying urban fire activity in China. Here, we present the China Fire History Atlas(CFHA), which is based on 19 947documentary records and represents fires in urban areas of China over the twentieth century(1901–1994).We found that temperature variability is a key indicator of urban fire activity in China, with warmer temperatures being correlated with more urban fires, and that this fire–temperature relationship is seasonally and regionally explicit. In the early twentieth century, however, the fire–temperature relationship was overruled by war-related fires in large urban areas. We further used the fire–temperature relationship and multiple emissions scenarios to project fire activity across China into the twenty-first century. Our projections show a distinct increase in future urban fire activity and fire-related economic loss. Our findings provide insights into fire–climate relationships in China for densely-populated areas and on policy-relevant time scales and they contribute spatial coverage to efforts to improve global fire models.

关键词： fire–climate interactions global warming fire history network urban fires fire management

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Three-space Problems for the Bounded Compact Approximation Property

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Acta Mathematica Sinica,English Series 2013年第4期29卷 625-632页

作者： Dong Yang CHEN ben Tuo zheng School of Mathematical Sciences Xiamen University Department of Mathematical Sciences The University of Memphis

In this paper, the notion of the bounded compact approximation property （BCAP） of a pair [Banach space and its subspace] is used to prove that if X is a closed subspace of Eoo with the BCAP, then L∞/X has the BCAP. We also show that X＊ has the A-BCAP with conjugate operators if and only if the pair （X, Y） has the A-BCAP for each finite codimensional subspace Y C X. Let M be a closed subspace of X such that M~ is complemented in X＊. If X has the （bounded） approximation property of order p, then M has the （bounded） approximation property of order p.

关键词： The bounded compact approximation property a pair the (bounded) approximationproperty of order p

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On Proximinality of Convex Sets in Superspaces

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Acta Mathematica Sinica,English Series 2016年第6期32卷 633-642页

作者： Li Xin CHENG zheng Hua LUO Wen ZHANG ben Tuo zheng School of Mathematical Sciences Xiamen University School of Mathematical Sciences Huaqiao University Department of Mathematical Sciences the University of Memphis

Abstract In this paper, we show that a closed convex subset C of a Banach space is strongly proximinal （proximinal, resp.） in every Banach space isometrically containing it if and only if C is locally （weakly, resp.） compact. As a consequence, it is proved that local compactness of C is also equivalent to that for every Banach space Y isometrically containing it, the metric projection from Y to C is nonempty set-valued and upper semi-continuous.

关键词： Proximinality convex set local compactness Banach space

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Perturbations of Frames

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Acta Mathematica Sinica,English Series 2014年第7期30卷 1089-1108页

作者： Dong Yang CHEN Lei Li ben Tuo zheng School of Mathematical Sciences Xiamen University School of Mathematical Sciences and LPMC Nankai University Department of Mathematics University of MemphisMemphisTN 38152-3240USA

In this paper, we give some sufficient conditions under which perturbations preserve Hilbert frames and near-Riesz bases. Similar results are also extended to frame sequences, Riesz sequences and Schauder frames. It is worth mentioning that some of our perturbation conditions are quite different from those used in the previous literatures on this topic.

关键词： Hilbert frames near-Riesz basis Schauder frames perturbation

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Diachronic Emergence and Its Characteristics from the Viewpoint of Complexity Science

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Frontiers of Philosophy in China 2020年第4期15卷 653-674页

作者： FAN Dongping zheng ben Institute for Science Technology and SocietySouth China Normal UniversityGuangzhou 510631China

Complexity science,which arose in the second half of the 20th century,initiated research into the emergence of complex systems and led to the rise of the concept of diachronic *** to British emergentism,research on diachronic emergence underwent some crucial changes—namely,(1)putting the enterprise of unveiling the mechanics of emergence at its core;(2)taking inter-disciplinary research as its viewpoint;(3)and taking computer simulation as its *** of this new approach,“diachronic emergence”is closely related to terms from complexity science such as“systems,”“self-organization,”“complexity,”and“chaos.”In this paper,we examine two cases of purported diachronic emergence and argue that both count as genuine cases of ontological *** first is Paul Humphreys,fusion emergence and the second is Mark Bedau’s simulation *** both cases,the emergent entity/property possesses genuine causal powers,and hence counts as a form of ontological,not merely epistemological *** emergence is a kind of strong diachronic emergence that emphasizes diachronicity and *** kind of emergence based on computer simulations can be seen as a kind of weak diachronic *** studies the process and mechanics of emergence with the help of computer simulations,and he argues that weak diachronic emergence has characteristics such as underivability without simulation,explanatory incompressibility,and underivability without crawling the micro-causal ***,he tries to present an explanatory model of weak emergence that posits the existence of higher-level entities with weak downward causation and claims the emergent level to be explanatorily *** core of both strong diachronic emergence and weak diachronic emergence is a focus on unpredictable emergent entities,which are new properties or new structures generated from evolution,and a characteristic emphasis on the diachronicity of the generation of emergent e

关键词： diachronic emergence weak emergence ontological emergence

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水性反射隔热型涂料的制备及性能影响因素探究

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中国涂料 2024年第2期39卷 32-37页

作者：高本正王娜齐舵于帅沈阳化工大学辽宁省特种功能材料合成与制备重点实验室沈阳110142 沈阳先进涂层材料产业技术研究院沈阳110300 辽宁顺风新材料科技有限公司沈阳110326

研究了反射隔热涂料中重要组分对其性能的影响规律。以纯丙乳胶作为成膜物,空心玻璃微珠和金红石型二氧化钛作为功能填料,在基本配方体系基础上,通过单一变量控制法研究了空心玻璃微珠、金红石型二氧化钛的尺寸及添加量等因素对反射隔... 详细信息

研究了反射隔热涂料中重要组分对其性能的影响规律。以纯丙乳胶作为成膜物,空心玻璃微珠和金红石型二氧化钛作为功能填料,在基本配方体系基础上,通过单一变量控制法研究了空心玻璃微珠、金红石型二氧化钛的尺寸及添加量等因素对反射隔热涂料透水及耐沾污性、太阳光反射性能和隔热性能的影响规律,并制备得到综合性能优异的水性反射隔热涂料。研究结果表明,反射隔热填料不仅影响涂层的太阳光反射和隔热性能,对于涂层的耐水和耐沾污性也有显著影响。

关键词：反射隔热涂料空心玻璃微珠金红石型二氧化钛太阳光反射比

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2016—2021年广西某市女性性工作者梅毒感染情况及影响因素分析

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中国健康教育 2024年第3期40卷 271-276页

作者：李牧黄运轩于德娥徐世宾彭兵朱刚劲徐月香梁贤君邓本本刘家伟叶力梁冰玉广西医科大学公共卫生学院广西艾滋病防治研究重点实验室广西南宁530021 贵港市疾病预防控制中心广西贵港537100 海南医学院公共卫生与全健康国际学院海南海口571199

目的分析广西某市2016—2021年女性性工作者(Female sex workers,FSWs)梅毒感染情况及其影响因素,为防控策略提供依据。方法使用《国家艾滋病哨点监测FSW调查问卷》开展调查,用ELISA和RPR/TRUST检测梅毒感染情况,运用二元Logistic回归... 详细信息

目的分析广西某市2016—2021年女性性工作者(Female sex workers,FSWs)梅毒感染情况及其影响因素,为防控策略提供依据。方法使用《国家艾滋病哨点监测FSW调查问卷》开展调查,用ELISA和RPR/TRUST检测梅毒感染情况,运用二元Logistic回归分析梅毒感染的影响因素。结果本次共调查3564人,总体梅毒感染率为5.61%。2016年梅毒检出率为8.85%,小学及以下文化程度的梅毒感染率为8.49%,低档性交易场所工作的FSWs梅毒感染率为11.75%,前一个工作地点位于外地的FSWs梅毒检出率为8.81%,HIV阳性感染者的梅毒感染率为13.85%。多因素分析结果显示,年龄≥35岁(AOR=1.989,95%CI:1.276~3.102)的FSWs相比于年龄<35岁更有可能感染梅毒;相比于中/高档次的性交易场所,在低档次场所工作(AOR=3.477,95%CI:2.444~4.945)的FSWs更具有感染梅毒的风险(P<0.05)。结论广西某市FSWs人群的梅毒感染率与年龄、文化程度、性交易场所的档次等因素有关。相关部门须加强对年龄大于35岁、低文化程度、低档次场所工作的FSWs人群的性病干预,降低广西某市FSWs人群的梅毒感染率。

关键词：女性性工作者梅毒影响因素

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An efficient strategy enabling solution processable thermally activated delayed fluorescence emitter with high horizontal dipole orientation

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Chinese Journal of Structural Chemistry 2024年第6期43卷 4-5页

作者： zheng Zhao ben Zhong Tang School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen(CUHK-Shenzhen)Guangdong518172China

Organic light-emitting diodes(OLEDs)based on highly efficient aggregate emitters present a significant breakthrough in realizing low-cost displays and solid-state lighting,thus drawing considerable research interest i... 详细信息

关键词： emitter breakthrough dipole

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A Universal Inequality for Stability of Coarse Lipschitz Embeddings

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数学学报:英文版 2023年第9期39卷 1805-1816页

作者： Duan Xu Dai Ji Chao Zhang Quan Qing Fang Long Fa Sun ben Tuo zheng School of Science Jimei UniversityXiamen361021P.R.China School of Science Hubei University of TechnologyWuhan430068P.R.China Key Laboratory of Applied Mathematics of Fujian Province University Putian UniversityPutian351100P.R.China School of Mathematics and Physics North China Electric Power UniversityBaoding071003P.R.China Department of Mathematical Sciences University of MemphisMemphisTN38152USA

Let X and Y be two pointed metric *** this article,we give a generalization of the Cheng-Dong-Zhang theorem for coarse Lipschitz embeddings as follows:If f:X→Y is a standard coarse Lipschitz embedding,then for each x^(*)∈Lip_(0)(X)there existα,γ>0 depending only on f and Q_(x)*∈Lip_(0)(Y)with‖Q_(x)*‖_(Lip)≤α‖x^(*)‖_(Lip)such that|Q_(x)*f(x)-x^(*)(x)|≤γ‖x^(*)‖_(Lip),for all x∈*** stability for a pair of metric spaces is *** can be considered as a coarse version of Qian *** an application,we give candidate negative answers to a 58-year old problem by Lindenstrauss asking whether every Banach space is a Lipschitz retract of its ***,we show that X is not a Lipschitz retract of its bidual if X is a universally left-coarsely stable space but not an absolute cardinality-Lipschitz *** there exists a universally right-coarsely stable Banach space with the RNP but not isomorphic to any Hilbert space,then the problem also has a negative answer for a separable space.

关键词： Lindenstrauss Problem coarse Lipschitz embedding coarse stability Banach space

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Effect of Ni substitution on the formability and magnetic properties of Gd50Co50 amorphous alloy

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Chinese Physics B 2020年第5期29卷 424-428页

作者： ben-zheng Tang Xiao-Ping Liu Dong-Mei Li Peng Yu Lei Xia Chongqing Key Laboratory of Photo-Electric Functional Materials College of Physics and Electronic EngineeringChongqing Normal UniversityChongqing 401331China Laboratory for Microstructure&Institute of Materials Shanghai UniversityShanghai 200072China

A small amount of Ni was added into the binary Gd50Co50 amorphous alloy to replace Gd in order to obtain ternary Co50Gd50-xNx(x=1,2,and 3)amorphous *** to the binary Gd50Co50 amorphous alloy,the Co50Gd50-xNx amorphous alloys show an enhanced Curie temperature(TC)with a weakened *** maximum magnetic entropy change(-Δ^Smpeak)of the Co50Gd50-xNx amorphous alloys is found to decrease with the increasing *** adiabatic temperature rise(ΔTad)of the Co50Gd47Ni3 amorphous alloy is superior to that of the Fe-based metallic glasses at room *** variation of the TC and-Δ^Smpeak of the Gd50Co50 amorphous alloy with Ni addition,and the mechanism involved,were discussed.

关键词： amorphous alloy glass forming ability magnetocaloric effect adiabatic temperature rise

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