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Study of Behavior Germination and Essays the Removing Tegumentary Inhibition of Seeds of Chamaerops humilis L. var. argentea Andre （Arecaceae）

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Journal of Life Sciences 2013年第5期7卷 501-506页

作者： Nadjat Medjati Okkacha Hasnaoui nouria hachemi Brahim Babali Mohammed Bouazza Department of Ecology and Environment Abou Bakr Belkaid University Tlemcen 13000 Algeria Department of Biology Dr Tahar Moulay University Sa~da 20000 Algeria Ecological and Natural Ecosystem Managements Laboratory University of Tlemcen Tlemcen 13000 Algeria

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Solvent-free synthesis of alumina supported cobalt catalysts for Fischer–Tropsch synthesis

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Journal of Energy Chemistry 2016年第6期25卷 1001-1007页

作者： Mengnan Lu nouria Fatah Andrei Y.Khodkov Unité de Catalyse et de Chimie du Solide (UCCS) State Key Joint Laboratory of Environment Simulation and Pollution Control (SKJLESPC) School of Environment POPs Research Center Tsinghua University Ecole Nationale Supérieure de Chimie de Lille

A novel mechano-synthesis method has been elaborated in this work for the design of efficient cobalt-based Fischer–Tropsch catalysts. The process aims to reduce the total number of steps involved in the synthesis of solid catalysts and thus to avoid relevant toxic solutions generated during the catalyst preparation. The mechano-synthesis of the Co/Al2O3catalyst was processed in a low-energy vibratory micro mill and high energy planetary ball mill. Porous spherical γ-aluminas (1860 µm and 71 µm mean particle diameter) were used in this work as host compounds. Co3O4(3 µm mean particle diameter) has provided guest particles for mechano-synthesis. The catalysts were characterized by textural (surface area, porosity and particle size) and structural analyses (X-ray diffraction, TPR, SEM-EDX and microprobe). The microprobe images show deposition of Co3O4on the surface of the alumina and indicated no Co3O4diffusion inside the alumina pores. SEM-EDX mapping illustrated that cobalt coating tended to occur on surface of rounded shape of cracked alumina fragments. After milling, the crystallite size of Co3O4decreased to 15 nm from 30 to 50 nm. The TPR profiles indicated very low concentrations of inactive cobalt aluminate mixed compounds which are usually produced during the catalyst preparation by impregnation. In Fischer–Tropsch synthesis, the catalysts prepared using mechano-synthesis methods showed catalytic performance comparable to the catalysts prepared by impregnation. © 2016 Science Press

关键词： Alumina Ball mills Catalysts Cobalt Crystallite size Impregnation Particle size Particle size analysis X ray diffraction

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A Multiple Classifier System Using an Adaptive Strategy for Intrusion Detection

A Multiple Classifier System Using an Adaptive Strategy for ...

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International Conference on Intelligent Computational Systems(ICICS’2012);International Conference on Mechanical,Automotive and Materials Engineering(ICMAME’2012);International Conference on Electronics,Biomedical Engineering and its Applications(ICEBEA’2012);International Conference on Ecological,Environmental and Biological Sciences(ICEEBS’2012);International Conference on Business,Economics,Management and Behavioral Sciences (ICBEMBS’2012);International Conference on Applied Mathematics and Pharmaceutical Sciences(ICAMPS’2012)

作者： Emna Bahri nouria Harbi Hoa Nguyen Huu university of Lyon ERIC Laboratory

Recently, information security has become a key issue in information technology as the number of computer security breaches are exposed to an increasing number of security threats. A variety of intrusion detection systems （IDS） have been employed for protecting computers and networks from malicious network-based or host-based attacks by using traditional statistical methods to new data mining approaches in last decades. In effect, the detection of the anomalies in the data-processing networks is regarded as one problem of data classification where the use of the data mining techniques and machine learning. In this paper, we present a new method performing the intrusion detection system. This approach, called MCSAS, is based on a multiple classifier System that uses an adaptive strategy for intrusion detection. The adaptive strategy is inspired from Boosting, an ensemble method that distinguishes attacks from normal behaviors and identifies different types of intrusions. The experimental results, conducted on the KDD99 dataset, prove that our proposed solution approach outperforms several state-of-the-art methods, particularly indetecting rare attack types.

关键词： Intrusion detection system ensembles methods new multiple classifier KDD99.

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Gas-phase Thermolysis of 1,2,3-triazole and 1,2,3-triazine Derivatives

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Journal of Chemistry and Chemical Engineering 2010年第4期4卷 34-40页

作者： Hanan Al-Awadi Maher Riyad Ibrahim nouria Abdel-Kareem Al-Awadi Yehia Abdou Ibrahim Applied Science Department College of Technological Studies Public Authority for Applied Education and Training P.O. Box42325 Shuwaikh 70654 Kuwait Chemistry Department Kuwait University P.O. Box 5969 Safat 13060 Kuwait

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