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8篇 您的检索式:作者名="Nouali"
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1Characterisation and seasonal variations of particles in the atmosphere of rural, urban and industrial areas:Organic compounds显示文摘Atmospheric aerosol samples(PM_(2.5–0.3), i.e., atmospheric particles ranging from 0.3 to2.5 μm) were collected during two periods: spring–summer 2008 and autumn–winter 2008–2009, using high volume samplers equipped with cascade impactors. Two sites located in the Northern France were compared in this study: a highly industrialised city(Dunkirk) and a rural site(Rubrouck). Physicochemical analysis of particulate matter(PM) was undertaken to propose parameters that could be used to distinguish the various sources and to exhibit seasonal variations but also to provide knowledge of chemical element composition for the interpretation of future toxicological studies. The study showed that PM2.5–0.3concentration in the atmosphere of the rural area remains stable along the year and was significantly lower than in the urban or industrial ones, for which concentrations increase during winter.High concentrations of polycyclic aromatic hydrocarbons(PAHs), dioxins, furans and dioxin like polychlorinated biphenyls(DL-PCBs), generated by industrial activities, traffic and municipal wastes incineration were detected in the samples. Specific criteria like Carbon Preference Index(CPI) and Combustion PAHs/Total PAHs ratio(CPAHs/TPAHs) were used to identify the possible sources of atmospheric pollution. They revealed that paraffins are mainly emitted by biogenic sources in spring–summer whereas as in the case of PAHs, they have numerous anthropogenic emission sources in autumn-winter(mainly from traffic and domestic heating).Fabrice Cazier Paul Genevray Dorothée Dewaele Habiba Nouali Anthony Verdin Frédéric Ledoux Adam Hachimi Lucie Courcot Sylvain Billet Saad Bouhsina Pirouz Shirali Guillaume Garcon Dominique Courcot 2016Journal of Environmental Sciences2016,28,6:4
2Secure Inverted Index Based Search over Encrypted Cloud Data with User Access Rights Management显示文摘Cloud computing is a technology that provides users with a large storage space and an enormous computing power.However,the outsourced data are often sensitive and confidential,and hence must be encrypted before being outsourced.Consequently,classical search approaches have become obsolete and new approaches that are compatible with encrypted data have become a necessity.For privacy reasons,most of these approaches are based on the vector model which is a time consuming process since the entire index must be loaded and exploited during the search process given that the query vector must be compared with each document vector.To solve this problem,we propose a new method for constructing a secure inverted index using two key techniques,homomorphic encryption and the dummy documents technique.However,1)homomorphic encryption generates very large ciphertexts which are thousands of times larger than their corresponding plaintexts,and 2)the dummy documents technique that enhances the index security produces lots of false positives in the search results.The proposed approach exploits the advantages of these two techniques by proposing two methods called the compressed table of encrypted scores and the double score formula.Moreover,we exploit a second secure inverted index in order to manage the users'access rights to the data.Finally,in order to validate our approach,we performed an experimental study using a data collection of one million documents.The experiments show that our approach is many times faster than any other approach based on the vector model.Fateh Boucenna Omar Nouali Samir Kechid M.Tahar Kechadi 2019Journal of Computer Science & Technology2019,34,1:1
3Influence of the particle sizes on the energetic performances of MFI-type zeolites 显示文摘Kabalan I Khay I Nouali H 2015J PhysChemC2015,119,18:1
4Emissions of Unregulated Pollutants from European Gaso- line and Diesel Passenger Cars 显示文摘Isabelle Caplaina Fabrice Cazierb Habiba Nouali 2006Atmospheric Environment2006,40,59:1
5Emissions of Unregulated Pollutants from European Gasoline and Diesel Pas- senger Cars 显示文摘Isabelle Caplain Fabrice Cazier Habiba Nouali 2006Atmospheric Environment2006,40,:1
6A semantic vector Space and feature-based approach for automatic information filtering 显示文摘NOUALI O BLACHE P 2004Expert Systems with Application2004,26,2:1
7Synthesis of CuO/SBA-15 adsorbents for SO x removal applications, using different impregnation methods显示文摘Pierrick Gaudin Sophie Dorge Habiba Nouali Jo?l Patarin Jean-Fran?ois Brilhac Emmanuel Fiani Matthieu Vierling Michel Molière 2015Comptes rendus - Chimie2015,,10:1
8A combined experimental and theoretical study of the simultaneousoccupation of SIa and SI' sites in fully dehydrated K-LSX 显示文摘Guesmi H Massiania P Nouali H 2012Microporous and Mesoporous Materials2012,159,1:1
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