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Highly sensitive and selective ethanol sensors based on flower-like ZnO nanorods

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Journal of Semiconductors 2011年第9期32卷 20-23页

作者：刘丽王连元韩郁李守春陕皓吴佩林孟鑫魏爱国李伟 State Key Laboratory of Superhard Materials College of PhysicsJilin University College of Instrumentation and Electrical Engineering Jilin University

A simple and easy hydrothermal process has been employed to synthesize flower-like ZnO products consisting of numerous orderly oriented and bundled *** structure and morphology of the novel ZnO structure are characterized in *** flower-like ZnO-nanorod-based gas sensors are investigated for their ethanoi-sensing properties,and the results reveal that the sensors exhibit a high response of 143.6 to 1000 ppm ethanol and good selectivity at the optimal operating temperature of 250℃.The effect of the flower-like morphology on the response of the gas sensors to ethanol is also investigated.

关键词： ZnO nanostructure ethanol gas sensor

Soil Heavy Metal Pollution Around the Dabaoshan Mine,Guangdong Province,China

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Pedosphere 2007年第5期17卷 588-594页

作者： ZHOU Jian-Min DANG Zhi CAI Mei-Fang LIU Cong-Qiang College of environmental Science and Engineering South China University of Technology Guangzhou 510640 （China） Guangdong Key Laboratory of Agro-environment Integrated Control Guangdong Institute of Eco-Environment and Soil Science Guangzhou 510650 （China） State Key Laboratory of environment Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 （China）

Soil contamination in the vicinity of the Dabaoshan Mine, Guangdong Province, China, was studied through determi- nation of total concentrations and chemical speciation of the toxic metals, Cu, Zn, Cd, and Pb, using inductively coupled plasma mass spectrometry. The results showed that over the past decades, the environmental pollution was caused by a combination of Cu, Zn, Cd, and Pb, with tailings and acid mine drainage being the main pollution sources affecting soils. Significantly higher levels （P ≤ 0.05） of Cu, Zn, Cd, and Pb were found in the tailings as compared with paddy, garden, and control soils, with averages of 1486, 2516, 6.42, and 429 mg kg^-1, respectively. These metals were continuously dispersed downstream from the tallings and waste waters, and therefore their concentrations in the paddy soils were as high as 567, 1 140, 2.48, and 191 mg kg^-1, respectively, being significantly higher （P ≤ 0.05） as compared with those in the garden soils. The results of sequential extraction of the above metals from all the soil types showed that the residual fraction was the dominant form. However, the amounts of metals that were bound to Fe-Mn oxides and organic matter were relatively higher than those bound to carbonates or those that existed in exchangeable forms. As metals could be transformed from an inert state to an active state, the potential environmental risk due to these metals would increase with time.

关键词： chemical speciation combined pollution index (CPI) contaminated soil heavy metals

An artificial intelligence framework for explainable drift detection in energy forecasting

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Energy and AI

Energy and AI 2024年第3期17卷 368-379页

作者： Chamod Samarajeewa Daswin De Silva Milos Manic Nishan Mills Harsha Moraliyage Damminda Alahakoon Andrew Jennings Centre for Data Analytics and Cognition La Trobe UniversityAustralia department of Computer Science Virginia Commonwealth UniversityRichmondUSA

Accurate energy consumption forecasting is crucial for reducing operational costs, achieving net-zero carbon emissions, and ensuring sustainable buildings and cities of the future. Despite the frequent use of Artificial Intelligence (AI) algorithms for learning energy consumption patterns and predictions in Building Science, relying solely on these techniques for energy demand prediction addresses only a fraction of the challenge. A drift in energy usage can lead to inaccuracies in these AI models and subsequently to poor decision-making and interventions. While drift detection techniques have been reported, a reliable and robust approach capable of explaining identified discrepancies with actionable insights has not been discussed in extant literature. Hence, this paper presents an Artificial Intelligence framework for energy consumption forecasting with explainable drift detection, aimed at addressing these challenges. The proposed framework is composed of energy embeddings, an optimized dimensional model integrated within a data warehouse, and scalable cloud implementation for effective drift detection with explainability capability. The framework is empirically evaluated in the real-world setting of a multi-campus, mixed-use tertiary education setting in Victoria, Australia. The results of these experiments highlight its capabilities in detecting concept drift, adapting forecast predictions, and providing an interpretation of the changes using energy embeddings.

关键词： Building energy consumption forecasting Explainable drift detection Energy embedding Dimensional modeling

Intraspecific genetic variability,differentiation and evolutionary relationships revealed through microsatellite loci in seven economically important Calamus species

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Journal of Forestry Research 2020年第5期31卷 1899-1911页

作者： Binoy Kurian A.S.Hemanthakumar Joemon Jacob Wickneswari Ratnam C.Y.Choong Prabalee Sarmah S.Shefeek Vishnu V.Nair S.V.Sajithkumar K.K.Sabu Jawaharlal Nehru Tropical Botanic Garden and Research Institute(JNTBGRI) PalodeThiruvananthapuramKerala 695562India Universiti Kebangsaan Malaysia 43600 BangiSelangorMalaysia Assam Agricultural University JorhatAssam 785013India

Population density,species richness and critical population parameters are crucial in determining the levels of gene diversity in dioecious species of the genus *** extent of intraspecific and intrageneric genetic variability in Calamus from the southern Western Ghats of India was studied using 26 microsatellite markers by sampling 227 individuals belonging to seven economically important *** heterozygosity of microsatellite loci ranged from zero to *** gene diversity within species was 0.13;in all species it was 0.18 and amongst species was *** Shannon Information Index was the lowest for Calamus metzianus(0.11),whereas it ranged from 0.16 to 0.26 for other *** expected heterozygosity varied from 0.08 to *** hookerianus and Calamu travancoricus showed the highest genetic differentiation(44%)revealed through Fst values,whereas the lowest(22%)was observed between Calamus gamblei and Calamu *** structuring and phylogenetic analysis differentiated the seven *** to overexploitation and loss of rare alleles,small populations could lead to fertilization between closely related individuals,resulting in inbreeding and increasing the risk of *** could be important for species such as *** where allelic polymorphism was 23%,whereas for all other species it was 38%to 46%.Genetic diversity“micro-hotspots”were identified from the protected area network of the southern and central Western Ghats with highest observed *** microhotspots from the Agasthyamalai Biosphere Reserve and the Pushpagiri Wildlife Sanctuary may be possible for long-term conservation *** findings of this study lay a strong foundation for strengthening protected area networks,especially areas with intermediate levels of disturbance.

关键词： Genetic diversity Differentiation Population structure Conservation Microsatellites Calamus spp

Enhanced aboveground biomass by increased precipitation in a central European grassland

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Ecological Processes 2018年第1期7卷 435-447页

作者： Md Lokman Hossain Carl Beierkuhnlein department of Geography Hong Kong Baptist University15 Baptist University RoadKowloon TongHong Kong Global Change Ecology International Elite Study ProgrammeFaculty of BiologyChemistry and Earth SciencesUniversity of BayreuthUniversitätsstraße 3095440 BayreuthGermany department of environmental Protection Technology German University BangladeshGazipur 1702Bangladesh department of Biogeography University of BayreuthUniversitätsstraße 3095440 BayreuthGermany

Background:Global climate change is projected to increase temperature and alter precipitation pattern,which could affect grassland ***-term observation at a field experiment can be a powerful approach to explore the impacts of climate change on biomass productivity in *** attempting to understand how climatic variability regulates biomass productivity,we analyzed long-term records of temperature and precipitation to examine how variation of temperature and precipitation across 19 years affect biomass ***:We established the experiment with 64 plots in two blocks and planted 31 species in 30 different *** harvested aboveground biomass twice a year,sorted biomass by functional groups,and weighed dry *** site was mown after each *** did not apply any fertilizer and *** linear regression model,we examined the influences of growing season temperature and precipitation on biomass ***:The results showed that aboveground biomass productivity in September and annual were significantly increased in post-drought(2003–2015).The relationships of aboveground biomass productivity with growing season precipitation were significantly *** results showed that aboveground biomass productivity in June and annual were sensitive to growing season *** relationships of aboveground biomass productivity of the functional group of grasses with early growing season temperature were significantly *** growing season precipitation had a significant positive effect on aboveground biomass productivity of the functional groups of grasses and ***-drought aboveground biomass productivity of the functional groups of grasses in June and September were declined,whereas legumes significantly increased,which suggests that the role of dominant grasses may shift by legumes with global climate ***:Our results highlight that early and late growing temperature and precipitat

关键词： Aboveground biomass BIODEPTH experiment Climate change Functional groups Grassland biodiversity Hay meadow Precipitation variability Temperate grassland Temperature variability

Co-contaminants of microplastics in two seabird species from the Canadian Arctic

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environmental Science and Ecotechnology 2022年第4期12卷 87-96页

作者： Roxana Sühring Julia E.Baak Robert J.Letcher Birgit M.Braune Amila de Silva Cody Dey Kim Fernie Zhe Lu Mark L.Mallory Stephanie Avery-Gomm Jennifer F.Provencher department of Chemistry and Biology Toronto Metropolitan University(formerly known as Ryerson University)350 Victoria StTorontoONM5B 2K3Canada department of Natural Resource Science McGill UniversitySainte Anne de BellevueQuebecH9X 3V9Canada environment and Climate Change Canada National Wildlife Research CentreCarleton UniversityRaven RoadOttawaOntarioK1A 0H3Canada Aquatic Contaminants Research Division Environment and Climate Change CanadaBurlingtonOntarioL7S 1A1Canada Ecotoxicology&Wildlife Health Division Environment and Climate Change CanadaBurlingtonOntarioL7S 1A1Canada Institut des Sciences de la Mer de Rimouski Université du Québec à RimouskiRimouskiQuébecG5L 3A1Canada department of Biology Acadia UniversityWolfvilleNova ScotiaB4P 2R6Canada

Through ingestion and subsequent egestion,Arctic seabirds can bioaccumulate microplastics at and around their colony breeding *** microplastics in Arctic seabirds have been well documented,it is not yet understood to what extent these particles can act as transport vehicles for plastic-associated contaminants,including legacy persistent organic pollutants(POPs),trace metals,and organic *** investigated the occurrence and pattern of organic and inorganic co-contaminants of microplastics in two seabird species from the Canadian Arctic-northern fulmar(Fulmarus glacialis)and black-legged kittiwake(Rissa tridactyla).We found that fulmars had higher levels of plastic contamination and emerging organic compounds(known to be plastic additives)than kittiwakes,whereas higher concentrations of legacy POPs were found in kittiwakes than the ***,fulmars,the species with the much larger foraging range(~200 km),had higher plastic pollution and overall contaminant burdens,indicating that birds may be acting as long-range transport vectors for plasticassociated *** results suggest a potential connection between plastic additive contamination and plastic pollution burdens in the bird stomachs,highlighting the importance of treating plastic particles and plastic-associated organic additives as co-contaminants rather than separate pollution issues.

关键词： Plastic contaminants Contaminants of emerging arctic concern Arctic Seabirds PFAS OPEs PBDEs Trace metals

Calibration of GPS receivers based on IGS and CORS techniques

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Geo-Spatial Information Science 2012年第3期15卷 213-217页

作者： SHI Kun QIU Yunfeng ZHAO Biyun NIE Jin CHEN Yuhan Faculty of Land Resource Engineering Kunming University of Science and Technology257 Xuefu RoadKunming 650093China Yunnan Province Surveying and Mapping Equipment Test Station Kunming 650034China Yunnan environment Protection department Kunming 650035China

Concerning the traditional methods,more technical details and more strict conditions are required for global positioning system(GPS)receiver’s calibration especially for mid and long baseline which influenced by the environment around easily,and more investigations have to be *** this paper,a new method on how to calibrate GPS receivers is suggested,which is based on the convenient condition that Kunming has one international GPS service station and its own continuously operating reference stations,and the method is confirmed by a test using six different types of GPS *** with the traditional methods,the new method is more efficient by decreasing routine calibration works up to 50%.

关键词： IGS CORS GPS receiver calibration baseline

Distribution patterns of octylphenol and nonylphenol in the aquatic system at Mai Po Marshes Nature Reserve,a subtropical estuarine wetland in Hong Kong

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Journal of environmental Sciences 2007年第6期19卷 657-662页

作者： LI Xiang-li LUAN Tian-gang LIANG Yan WONG Ming-hung LAN Chong-yu Croucher Institute for environmental Sciences and department of Biology Hong Kong Baptist UniversityHong Kong China State Key Laboratory of Biocontrol School of life Sciences Sun Yat-Sen （Zhongshan） University Guangzhou 510275 China

Spatial and temporal distribution of octylphenol （OP） and nonylphenol （NP） in Mai Po Marshes, a subtropical estuarine wetland in Hong Kong, were investigated. Surface water samples were collected every month from 11 sites during the period of September- December 2004. Concentrations of OP and NP ranged from 11.3 to 348 ng/L and from 29 to 2591 ng/L, respectively. The high levels of NP and OP were found in November and December than in September and October. The levels of OP and NP have no significant spatial differences except September. Total organic matter in the sediments appeared to be an important factor in controlling the fate of these compounds in the aquatic environment.

关键词： octylphenol nonylphenol endocrine-disrupting chemicals Ramsar Site

The sea bass Dicentrarchus labrax as a marine model species in immunology:Insights from basic and applied research

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Aquaculture and Fisheries 2024年第2期9卷 136-143页

作者： Andrea Miccoli Francesco Buonocore Simona Picchietti Giuseppe Scapigliati department for Innovation in Biological Agro-food and Forest SystemsUniversity of TusciaViterbo01100Italy

This review summarizes the current knowledge on immune defence activities of the European sea bass Dicentrarchus labrax by reporting the consistent amount of work done on this economically-important species.A draft genome sequence is available for this species,together with whole transcriptomes from lymphoid and non-lymphoid *** full-length coding sequences of many immunoregulatory and immune-related genes allow for targeted quantitative PCR analysis,nowadays needed for-omics data verification,ex vivo and in *** first anti-T cells monoclonal antibody teleost-wise was obtained in sea bass,followed by several monoclonal and polyclonal markers of lymphocyte populations,namely T cells(pan-T,CD3ε,TcRγ,CD45),and B cells(IgM,IgT,IgD).The combined use of molecular and biochemical tools enabled investigations on innate and acquired immune responses of sea bass in unstimulated/stimulated fish,along the development and under variable environmental conditions and food *** overview of sea bass viral and bacterial pathogens and available vaccines against these microorganisms is also *** knowledge accumulated in the past 25 years validates the European sea bass as a reference marine model in the field of fish immunology.

关键词： Sea bass Dicentrarchus labrax Fish immunology Acquired immunity Innate immunity Evolutionary immunology