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Particuology 2024年第8期91卷 333-340页

作者： Hang Li Kaisheng Yao Tianhang Liu weiwei lu School of Chemistry and Chemical Engineering Henan University of Science and TechnozlogyLuoyang471023China School of Physics and Engineering Henan University of Science and TechnologyLuoyang471023China

Au hierarchical architectures with special morphology and structures are strongly desired in varied ***,a simple synthesis method was developed for the one-step preparation of Au micronails(MNs)at the planar liquid-liquid interface under mild *** well-defined Au MNs were grown and constructed at CHCl_(3)-H_(2)O interface at room temperature using aniline in CHCl_(3)as reducing agent and HAuCl_(4)in H_(2)O as precursor and no surfactant or seed is *** intriguing Au MNs with rough surface consist of big heads and thin rods,just like iron nails in ***,through simple changing the reagent concentrations,the length and surface roughness of Au MNs can be adjusted *** effects of a series of factors on the morphology and structure of the products are studied in *** p-aminothiophenol as a molecular probe,the as-obtained Au MNs all exhibit dramatically improved surface enhanced Raman scattering sensitivity and high reproducibility,the enhancement factor and limit of detection of Au MNs are 5.4×10^(5)and 1.0×10^(-10),respectively.

关键词： Au micronails Liquid-liquid interface synthesis Surface enhanced Raman scattering P-aminothiophenol

Urban public health assessment and pattern analysis： comparison of four cities in different countries

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Frontiers of Earth Science 2013年第2期7卷 191-198页

作者： Meirong SU Chen CHEN weiwei lu Gengyuan LIU Zhifeng YANG Bin CHEN State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China

Urban public health is an important global issue, and receives extensive attention. It is necessary to compare urban public health status among different cities, so that each city can define its own health patterns and limiting factors. The following assessment indicators were established to evaluate urban public health status： living conditions, physical health, education and culture, envir- onmental quality, and social security. A weighted-sum model was used in combination with these indicators to compare the urban public health status in four cities-- Beijing, New York, London, and Tokyo--using data for 2000-2009. Although the urban public health level of Beijing was lower than that of the other cities, it showed the greatest increase in this level over the study period. Different patterns of urban public health were identified： London had the most balanced, steady pattern （almost all factors performed well and developed stably）; New York and Tokyo showed balanced, but unsteady patterns （most factors remained high, though social security and environ- mental quality fluctuated）; Beijing had the most unba- lanced, unsteady pattern （the different factors were at different levels, and education and culture and social security fluctuated）. For enhanced urban public health status, environmental quality and education and culture clearly need to be improved in Beijing. This study demonstrates that a comparison of different cities is helpful in identifying limiting factors for urban public health and providing an orientation for future urban development.

关键词： public health urban ecosystem health pattern limiting factor

Urban energy consumption and related carbon emission estimation： a study at the sector scale

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Frontiers of Earth Science 2013年第4期7卷 480-486页

作者： weiwei lu Chen CHEN Meirong SU Bin CHEN Yanpeng CAI Tao XING State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China Institute for Energy Environment and Sustainable Communities University of Regina Regina S4S 7H9 Canada Beijing Yanqing District Development and Reform Commission Beijing 102100 China

With rapid economic development and energy consumption growth, China has become the largest energy consumer in the world. Impelled by extensive international concern, there is an urgent need to analyze the character- istics of energy consumption and related carbon emission, with the objective of saving energy, reducing carbon emission, and lessening environmental impact. Focusing on urban ecosystems, the biggest energy consumer, a method for estimating energy consumption and related carbon emission was established at the urban sector scale in this paper. Based on data for 1996-2010, the proposed method was applied to Beijing in a case study to analyze the consumption of different energy resources （i.e., coal, oil, gas, and electricity） and related carbon emission in different sectors （i.e., agriculture, industry, construction, transportation, household, and service sectors）. The results showed that coal and oil contributed most to energy consumption and carbon emission among different energy resources during the study period, while the industrial sector consumed the most energy and emitted the most carbon among different sectors. Suggestions were put forward for energy conservation and emission reduction in Beijing. The analysis of energy consumption and related carbon emission at the sector scale is helpful for practical energy saving and emission reduction in urban ecosystems.

关键词： energy consumption carbon emission urban sector Beijing

The Breeding Ecology of a Critically Endangered Salamander,Hynobius amjiensis(Caudata：Hynobiidae),Endemic to Eastern China

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Asian Herpetological Research 2016年第1期7卷 53-58页

作者： Cangsong CHEN Jia YANG Yunke WU Zhongyong FAN weiwei lu Shuihua CHEN Lipeng YU College of Agriculture and Biotechnology Zhejiang University Hangzhou 310012 Zhejiang China Zhejiang Museum of Natural History Hangzhou 310014 Zhejiang China Department of Ecology and Evolutionary Biology Cornell University Ithaca 14853 New York USA The Administration Bureau of Longwangshan Natural Reserve Anji 313301 Zhejiang China

Hynobius amjiensis is a critically endangered salamander species（IUCN Red List） endemic to eastern China. It currently has three known populations： one in Longwangshan, Zhejiang Province（type locality）, and two in Qingliangfeng between Anhui and Zhejiang Provinces. We examined the relatively unstudied breeding ecology of this species in the field and at laboratory from March 2007 to May 2014. Adult males and females were year-round terrestrial, except for the February–April breeding season. During this period, we captured only a total of 16 breeding adults（11 males and 5 females）. As few as 100 breeding females were estimated based on the number of egg sacs observed since 2007. This number was significantly reduced from the estimated number between 1992 and 1998. Males（mean total length = 16.21 cm, mean body mass = 18.8 g） were slightly smaller than females（16.51 cm, 19.2 g）. Size of breeding pools ranged from 0.2 m-2 to 1.2 m-2（0.1–1.2 m depths）. Each female deposits a pair of egg sacs by attaching the adhesive tips of the sacs to aquatic plants or dead twigs. Fifteen pairs of egg sacs had an average length of 28.6 cm and a diameter of 3.3 cm. On average, each egg sac contained 75 eggs with a diameter of 0.3 cm. Our field survey revealed that H. amjiensis used oviposition sites in small, cool, and weakly acidic pools at high elevations（1 300–1 600 m） where peat moss was abundant. Reduction in wetland size and disappearance of suitable breeding pools suggest that this salamander species is under threat of extinction, particularly at Longwangshan, where 5 of the 9 breeding pools have either dried up or disappeared. Combined size of the remaining 4 pools is less than 2 m-2. We urge immediate implementation of more effective conservation measures and suggest that preservation priority should be given to habitat that contains suitable breeding pools.

关键词： Amji's salamander oviposition site reproductive traits population decline habitat destruction preservation priority

Simplified full-depth precast concrete deck panel systems for accelerated bridge construction

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Journal of Modern Transportation 2016年第4期24卷 251-260页

作者： Zhongguo John Ma Yulin Zhan Lin Xiao lungui Li weiwei lu Department of Civil and Environmental Engineering University of Tennessee School of Civil Engineering Southwest Jiaotong University Key Laboratory of High-Speed Railway Engineering Ministry of Education Southwest Jiaotong University

A simplified full-depth precast concrete deck panel system for accelerating bridge construction （ABC） is introduced and a finite dement analysis （FEA） is con- ducted to investigate the static and dynamic responses of this conceptual deck system. The FEA results are compared to those of the traditional full-depth precast concrete deck panel system. The comparison results show that the mechanical behavior of the new deck system is different from that of the traditional deck system. The concrete decks in the new system act as two-way slabs, instead of the one-way slab in the traditional system. Meanwhile, the connections in both the longitudinal and transverse direc- tions may need to accommodate the negative moments. Compared to those in the traditional system, the longitu- dinal nominal stress at middle span increases a lot in the new deck system and the effective flange width varies significantly. In addition, the dynamic results show that the impact factor is influenced by the spacing of connections. Finally, some design concerns of the new deck system are proposed.

关键词： Simplified full-depth precast concrete deckpanel systems ~ Accelerated bridge construction ~ Structuralresponse

平面流式图像技术全自动尿液分析系统复检规则的建立与验证

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中国医药指南 2025年第1期23卷 57-60页

作者：陆伟伟任晓丹周菁石艳曦宁永忠北京市垂杨柳医院检验科北京100021

目的对迪瑞FUS-3000Plus全自动尿液分析系统尿干化学与尿有形成分联合检测制定复检规则并进行验证。方法收集2019年1—6月北京市垂杨柳医院门诊及住院尿液标本共1300例,其中1000例用于建立复检规则,300例用于验证和调整复检规则。所有... 详细信息

目的对迪瑞FUS-3000Plus全自动尿液分析系统尿干化学与尿有形成分联合检测制定复检规则并进行验证。方法收集2019年1—6月北京市垂杨柳医院门诊及住院尿液标本共1300例,其中1000例用于建立复检规则,300例用于验证和调整复检规则。所有标本采用FUS-3000Plus进行干化学与尿有形成分检测和采用Fast Read-10尿沉渣定量分析板进行显微镜镜检。将尿有形检测项目白细胞(WBC)、红细胞(RBC)、管型(CAST)和与之分别对应的干化学检测项目白细胞酯酶(LEU)、尿潜血(BLD)、尿蛋白(PRO)的阴性、阳性两种结果作为复检规则的筛选表达式,以显微镜镜检结果为金标准,筛选适合本实验室的复检规则,并采用假阴性率、复检率等国内外通用的复检规则评估指标评价规则的合理性和可行性。结果以镜检结果为标准,统计1000份尿标本检测结果,初步制定出42条复检规则,计算应用规则后其假阴性率和复检率分别为2.60%和27.80%;统计300份验证标本检测结果,将复检规则精简为38条,并计算得到验证样本真阳性率为22.33%,假阳性率19.67%,真阴性率57.33%,假阴性率为0.67%,复检率为17%。结论本院建立42条尿复检规则经300份临床样本测试验证精简为38条尿复检规则满足临床测试要求,可将复检规则应用于临床。

关键词：复检规则尿干化学分析尿有形成分分析显微镜镜检

Normalized fatigue properties of asphalt mixture at various temperatures

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Journal of Road Engineering 2023年第3期3卷 279-287页

作者： Dongdong Ge Zihao Ju Defeng Duan Songtao Lyu weiwei lu Chaochao Liu Key Laboratory of Special Environment Road Engineering of Hunan Province Changsha University of Science and TechnologyChangsha 410114China National Engineering Research Center of Highway Maintenance Technology Changsha University of Science and TechnologyChangsha 410114China CCCC-SHB Fourth Engineering Co. Ltd.Luoyang 471000China

This study normalized the mixture's fatigue behavior at various temperatures,and the strength and fatigue tests of the mixture were *** stress state of the asphalt mixture includes direct tensile,uniaxial compression,and indirect *** Desai yield surface and fatigue path were *** a normalized fatigue characteristics model of the mixture was *** following conclusions were *** the increases in the loading rate,the strength of the asphalt mixture *** the temperature increases,the strength of the mixture is *** various temperatures and rates,the strength forms a closed curved *** Desai strength yield surface was established,which forms a closed curved *** the loading rate and temperature are below a certain critical line,the asphalt mixture will not undergo strength *** a fixed stress state,the fatigue damage path of the mixture was *** stress ratio was determined considering the influence of the loading *** this way,a normalized model can be described to express the asphalt mixture fatigue properties at various temperatures and stress *** the asphalt mixture in an indirect tensile state,the normalized fatigue equation parameter is *** model is more suitable for reflecting the viscous-elastic behavior of the mixtures than the fatigue equation determined by the notional stress ratio.

关键词： Asphalt mixture Normalization equation Load rates Test temperature Stress level Desai yield surface

Biochar-Induced Priming Effects in Young and Old Poplar Plantation Soils

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Phyton-International Journal of Experimental Botany 2020年第1期89卷 13-26页

作者： weiwei lu Yirui Zhang Yixian Yao Yuying Wu Han Y.H.Chen Hailin Zhang Jia Yu Caiqin Shen Qi Liu Honghua Ruan College of Biology and the Environment Co-Innovation Center for Sustainable Forestry in Southern ChinaNanjing Forestry UniversityNanjing210037China Faculty of Natural Resources Management Lakehead UniversityThunder BayONP7B 5E1Canada Department of Plant and Soil Sciences Oklahoma State UniversityStillwaterOK74078USA Advanced Analysis and Testing Center Nanjing Forestry UniversityNanjing210037China State Owned Forest Farm of Dongtai Dongtai224200China College of Forestry Nanjing Forestry UniversityNanjing210037China

The priming effect(PE)induced by biochar provides a basis for evaluating its carbon(C)sequestration potential in soils.A 60 days’laboratory incubation was conducted,which involved the amendment of biochar(1%of soil mass)produced from rice straw at 300℃(B300)and 500℃(B500)to young(Y)and old(O)poplar plantation soils,with the aim of studying the responses of biochar-induced PEs to poplar plantation *** incubation included six treatments:Y+CK(control),Y+B300,Y+B500,O+CK,O+B300,and O+*** dioxide(CO_(2))emissions were significantly increased(plusion,the response of biochar-induced PEs to poplar plantation age depends on biochar types while soil available C indirectly affects biochar-induced *** studies should focus on how the interactive effects between soil C availability and microbial community impacts biochar-induced PEs.

关键词： Biochar dissolved organic carbon pyrolysis temperature poplar plantation age priming effect

Research on Vehicle Anti-collision Technique Based on Monocular Vision

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Semiconductor Photonics and Technology 2010年第1期16卷 47-52页

作者： lu weiwei XIAO Zhitao LEI Meilin WU Jun School of Information and Communication Engineering Tianjin Polytechnic University Tianjin 300160 CHN

Vehicle anti-collision technique is a hot topic in the research area of Intelligent Transport System. The research on preceding vehicles detection and the distance measurement, which are the key techniques, makes great contributions to safe-driving. This paper presents a method which can be used to detect preceding vehicles and get the distance between own car and the car ahead. Firstly, an adaptive threshold method is used to get shadow feature, and a shadow!area merging approach is used to deal with the distortion of the shadow border. Region of interest(ROI) is obtained using shadow feature. Then in the ROI, symmetry feature is analyzed to verify whether there are vehicles and to locate the vehicles. Finally, using monocular vision distance measurement based on camera interior parameters and geometrical reasoning, we get the distance between own car and the preceding one. Experimental results show that the proposed method can detect the preceding vehicle effectively and get the distance between vehicles accurately.

关键词： monocular vision shadow feature symmetry feature monocular measurement of distance

Transmission of THz wave by liquid dielectric waveguide

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Science China(Technological Sciences) 2010年第6期53卷 1594-1597页

作者： ZHOU Lei,XU weiwei,HUA Tao,lu XueHui,CHEN Jian,JIN BiaoBing,KANG Lin & WU PeiHeng Research Institute of Superconductor Electronics (RISE),Nanjing University,Nanjing 210093,China 1. Research Institute of Superconductor Electronics (RISE) Nanjing University Nanjing 210093 China

The absorption and dispersion of several non-polar organic solvents from 0.2 to 2.5 THz are measured with the method of time-domain *** on the result,we believe that liquid paraffin might be a proper choice for liquid... 详细信息

关键词： THz liquid dielectric waveguide