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INVESTIGATION OF THE SPATIAL AND TEMPORAL DISTRIBUTION OF EXTREME HIGH TEMPERATURE IN CHINA WITH DETRENDED FLUCTUATION AND PERMUTATION ENTROPY

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Journal of Tropical Meteorology 2013年第4期19卷 349-356页

作者：尹继福郑有飞吴荣军傅颖王维 College of Atmospheric physics Nanjing University of Information Science& Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing University of Information Science & Technology College of Environmental Science and Engineering Nanjing University of Information Science & Technology

With temperatures increasing as a result of global warming,extreme high temperatures are becoming more intense and more frequent on larger scale during summer in *** recent years,a variety of researches have examined the high temperature distribution in ***,it hardly considers the variation of temperature data and systems when defining the threshold of extreme high *** order to discern the spatio-temporal distribution of extreme heat in China,we examined the daily maximum temperature data of 83 observation stations in China from 1950 to *** objective of this study was to understand the distribution characteristics of extreme high temperature events defined by Detrended Fluctuation Analysis(DFA).The statistical methods of Permutation Entropy(PE)were also used in this study to analyze the temporal *** results showed that the frequency of extreme high temperature events in China presented 3 periods of 7,10—13 and 16—20 years,*** abrupt changes generally happened in the 1960s,the end of 1970s and early *** was also found that the maximum frequency occurred in the early 1950s,and the frequency decreased sharply until the late 1980s when an evidently increasing trend ***,the annual averaged frequency of extreme high temperature events reveals a decreasing-increasing-decreasing trend from southwest to northeast China,but an increasing-decreasing trend from southeast to northwest *** the frequency was higher in southern region than that in northern ***,the maximum and minimum of frequencies were relatively concentrated *** results also shed light on the reasons for the periods and abrupt changes of the frequency of extreme high temperature events in China.

关键词： extreme high temperature events detrended fluctuation analysis permutation entropy spatial and temporal distribution

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Template-directed electrodeposition of SnO2 nanotubes and 1D Zn/SnO2 core-shell nanostructures

Template-directed electrodeposition of SnO2 nanotubes and 1D...

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Chinese Materials Congress 2012, CMC 2012

作者： Lai, Min Jian, Yi Ma, Yan Zheng, Gaige Zhong, Kun Li, Xiang School of Physics and Optoelectronic Engineering Nanjing University of Information Science and Technology 219 Ningliu Road Nanjing Jiangsu Province 210044 China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control 219 Ningliu Road Nanjing Jiangsu Province 210044 China School of Environmental Science and Engineering Nanjing University of Information Science and Technology 219 Ningliu Road Nanjing Jiangsu Province 210044 China

ISBN: (纸本)9783037856079

Template-directed electrosynthesis has been employed widely to prepare solids of defineddimension. It offers controllable routes to create nanostructures. In this study, one electrochemicalmethod to fabricate one-dimensional metal oxide nanostructures was developed. Theelectrochemistry strategy was employed to manipulate the pH value within the pores of a template andthe growth of continuous one-dimensional metal oxide nanostructures was controlled. The strategywas exemplified by the growth of tin oxide nanotubes. At room temperature, the reduction of nitratewithin pores was employed to electrogenerate hydroxide ions and drive local precipitation of stannicoxide nanotubes. The nanotube walls displayed nearly uniform thickness along their entire lengthwhich were obtained within commercial track-etched polycarbonate membranes. One-dimensionalZn/SnO2 core-shell nanostructures were achieved by the further electrodeposition of Zn within SnO2 nanotubes. © (2013) Trans Tech Publications, Switzerland.

关键词： Electrodeposition

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Synthesis of Mesostructured Iron Oxides with Potential As(V) Adsorption Application

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Chemical Research in Chinese Universities 2012年第4期28卷 559-562页

作者： LI Fei-hu FU Xiao-ru HUANG Jie ZHAI Jian-ping Jiangsu Provincial Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044P.R.China State Key Laboratory of Pollution Control and Resource Reuse School of EnvironmentNanjing UniversityNanjing 210046P.R.China

Mesostructured iron oxides（MIOs） were nanocasted from a plugged hexagonal templated silica（PHTS） with a Brunauer-Emmett-Teller（BET） surface area of 694 m 2 /*** of X-ray diffraction（XRD）,transmission electron microscopy（TEM） and N 2 adsorption-desorption suggest that the nanocasted MIOs are synthetic hematite（α-Fe2O3） with a wormhole-like mesoporous ***（V） adsorption test shows that the selected MIO—MIO-500（calcinated at 500 °C） with a BET surface area of 82 m^ 2 /g has a maximum adsorption capacity of 5.39 mg/g for As（V）,which is 2.5 times as large as that of natural hematite *** study suggests that MIOs could be potentially used as the adsorbent of As（V） in wastewater.

关键词： Mesostructured iron oxide Plugged hexagonal templated silica（PHTS） Nanocasting Arsenate Adsorption

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Characterization of submicron aerosols in the urban outflow of the central Pearl River Delta region of China

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Frontiers of Environmental Science & Engineering 2012年第5期6卷 725-733页

作者： Zhaoheng GONG Zijuan LAN Lian XUE Liwu ZENG Lingyan HE Xiaofeng HUANG Key Laboratory for Urban Habitat Environmental Science and Technology School of Environment and EnergyPeking University Shenzhen Graduate SchoolShenzhen 518055China Qingdao Environmental Monitoring Center Qingdao 266003China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Sciences and EngineeringNanjing University of Information Sciences and EngineeringNanjing 210044China

Submicron aerosol particles （with aerody- namic diameters less than 1 pm, PM1） were sampled and measured in Heshan, an urban outflow site of Guangzhou megacity in Pearl River Delta in South China, using an Aerodyne High-Resolution Time-of-Flight Aerosol Mass Spectrometer （HR-ToF-AMS） in November 2010 during 2010 Guangzhou Asian Games. The mean PM~ mass concentration measured was 47.9 ± 17.0 μg.m3 during the campaign, with organic aerosol （OA） and sulfate being the two dominant species, accounting for 36.3% and 20.9% of the total mass, respectively, followed by black carbon （17.1%, measured by an aethalometer）, nitrate （12.9%）, ammonium （9.6%） and chloride （3.1%）. The average size distributions of the species （except black carbon） were dominated by an accumulation mode peaking at -550 nm. Calculations based on high-resolution organic mass spectrum showed that, C, H, O and N on average contributed 58.1%, 7.3%, 30.7%, and 3.9% to the total organic mass, respectively. The average ratio of organic mass over organic carbon mass （OM/OC） was 1.73 ± 0.08. Four components of OA were identified by the Positive Matrix Factorization （PMF） analysis, including a hydro- carbon-like （HOA）, a biomass burning （BBOA） and two oxygenated （SV-OOA and LV-OOA） organic aerosol components, which on average accounted for 18.0%, 14.3%, 28.8% and 38.9% of the total organic mass, respectively.

关键词： organic aerosol high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) positive matrix factorization

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Template-directed Electrodeposition of SnO2 Nanotubes and 1D Zn/SnO2 Core-shell Nanostructures

Template-directed Electrodeposition of SnO2 Nanotubes and 1D...

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中国材料大会2012

作者： Min Lai Yi Jian Yan Ma Gaige Zheng Kun Zhong Xiang Li School of Physics and Optoelectronic Engineering Nanjing University of Information Science & Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science & Technology

ISBN: (纸本)9783037856079

Template-directed electrosynthesis has been employed widely to prepare solids of defined dimension. It offers controllable routes to create nanostructures. In this study, one electrochemical method to fabricate one-dimensional metal oxide nanostructures was developed. The electrochemistry strategy was employed to manipulate the pH value within the pores of a template and the growth of continuous one-dimensional metal oxide nanostructures was controlled. The strategy was exemplified by the growth of tin oxide nanotubes. At room temperature, the reduction of nitrate within pores was employed to electrogenerate hydroxide ions and drive local precipitation of stannic oxide nanotubes. The nanotube walls displayed nearly uniform thickness along their entire length which were obtained within commercial track-etched polycarbonate membranes. One-dimensional Zn/SnO2 core-shell nanostructures were achieved by the further electrodeposition of Zn within SnO2 nanotubes.

关键词： Template, Electrodeposition, One-dimensional nanostructures, Core-shell

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Templated electrodeposition of single-crystal ZnO nanorods

Templated electrodeposition of single-crystal ZnO nanorods

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2011 International Conference on Electronic and Mechanical Engineering and Information technology, EMEIT 2011

作者： Lai, Min Ma, Yan Li, Xiang School of Mathematics and Physics Nanjing University of Information Science and Technology 219 Ningliu Road Nanjing Jiangsu Province 210044 China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control 219 Ningliu Road Nanjing Jiangsu Province 210044 China School of Environmental Science and Engineering Nanjing University of Information Science and Technology 219 Ningliu Road Nanjing Jiangsu Province 210044 China

It is demonstrated that by electrochemically controlling the local pH within a membrane zinc oxide nanorods may be fabricated. Single-crystal ZnO nanorods were obtained when growth was performed at 90 °C using th... 详细信息

ISBN: (纸本)9781612840857

关键词： Zinc oxide

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Significant effect of porous structure on mass transportation process in catalytic reaction

Significant effect of porous structure on mass transportatio...

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第十三届全国青年催化学术会议

作者： Fei Teng Mindong Chen Guiqing Li Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School ofEnvironmental Science and Engineering Nanjing University of Information Science & Technology219 Ningliu Road Nanjing 210044 China Jiangsu Key L

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Theoretical Study of Effect of the Number of N,N-dimethyl-4-nitroaniline Units in Novel “Parallel Connection” Chromophores on Its Nonlinear Optical Properties

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International Scholarly Research Notices 2011年第1期2012卷

作者： Chao-Zhi Zhang Hui Cao Zhao-Bing Guo Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science & Engineering Nanjing University of Information Science & Technology Nanjing 210044 *** Department of Theoretical Chemistry School of Biotechnology Royal Institute of Technology 106 91 Stockholm Swedenkth.se

Design of “parallel connection” chromophores could give a way of acquiring effective chromophores. The semiempirical method ZINDO was employed to study relationship between static first hyperpolarizabilities of “parallel connection” chromophores and the number of parallel nonconjugated N,N-dimethyl-4-nitroaniline (DMNA) units in the chromophore. The results show that the chromophore containing three parallel non-conjugated DMNA units exhibits the highest static first hyperpolarizability, which is 1.8 times that of chromophore DMNA. However, static first hyperpolarizabilities of the chromophores containing four or five DMNA units are very small. The absorption maximum wavelength ( λ max ) of “parallel connection” chromophores is remarkably shorter (34.9 nm–38.1 nm) than that of 1DMNA . Therefore, the “parallel connection” chromophore containing three DMNA units would be an effective chromophore with a large first hyperpolarizability and a good optical transparency. It could give a useful suggestion for designing effective chromophores containing parallel non-conjugated D- π -A units.

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Relationships between Giardia cysts, Cryptosporidium oocysts and turbidity in drinking water

Relationships between Giardia cysts, Cryptosporidium oocysts...

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作者： Li, Qingsong Jiag, Zenghui Gao, Naiyun Huang, Xiaoming Water Resources and Environmental Institute Xiamen University of Technology Xiamen 361005 China Shanghai Municipal Water Supply Dispatching and Monitoring Center Shanghai 200002 China National Key Laboratory of Pollution Control and Reuse Tongji University Shanghai 200092 China

ISBN: (纸本)9783860090664

Relationships between turbidity, particle counts and concentrations, removal, recovery rates of Cryptosporidium oocysts and Giardia cysts in raw and filtered drinking water were presented. Based on the results, turbidity and particle counts can be used as indicators of drinking water treatment plant performance and can be used to monitor water quality when drinking water contaminated by Giardia cysts and Cryptosporidium oocysts. Some proposals on protection of source water were put forth according to practical production, it was suggested that we should pay attention to outbreaks of Cryptosporidiosis and Giardiasis during heavy rainfall periods.

关键词： Potable water

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Effects of La^(3+),Ce^(3+) on nitrogen removal in sequencing batch reactor

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Frontiers of Environmental Science & Engineering 2009年第3期3卷 369-374页

作者： Qing XIA Rui LIANG Yuxiang MAO Yuning HONG Lili DING Hongqiang REN Mingyu ZHAO State Key Laboratory of Pollution Control and Resource Reuse School of EnvironmentNanjing UniversityNanjing 210093China China National Environmental Monitoring Center Beijing 100012China Jiangsu Jiangshan Pharmaceutical Co. Ltd.Jingjiang 214500China Grandway Technology International Co. Ltd.Beijing 100102China

Batch experiments were conducted to study the short-term biological effects of rare earth ions(La^(3+),Ce^(3+))and their mixture on the nitrogen removal in a sequencing batch reactor(SBR).The data showed that higher NH4+–N removal rate,total inorganic nitrogen removal efficiency,and denitrification efficiency were achieved at lower concentrations of rare earth elements(REEs)(<1 mg/L).In the first hour of the aeration stage of SBR,the presence of REEs increased the total inorganic nitrogen removal efficiency and NH4+–N removal effi-ciency by 15.7%and 10%–15%,*** the concentrations of REEs were higher than 1 mg/L,the total inorganic nitrogen removal efficiency decreased,and nitrate was found to accumulate in the *** the concentrations of REEs was up to 50.0 mg/L,the total inorganic nitrogen removal efficiency was less than 30%of the control efficiency with a high level of *** concentrations of REEs were found to accelerate the nitrogen conversion and removal in SBR.

关键词： rare earth La^(3+) Ce^(3+) inorganic nitrogen nitrogen removal sequencing batch reactor(SBR)

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