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Adaptive Control for a Class of Systems with Output Deadzone Nonlinearity

Intelligent Control and Automation 2015年第4期6卷 215-228页

作者： nizar J. Ahmad Ebraheem K. Sultan mohammed Q. Qasem Hameed K. Ebraheem Jasem m. Alostad Faculty of Electronic Engineering Technology College of Technological Studies The Public Authority for Applied Education and Training (PAAET) Kuwait City Kuwait Faculty of Computer Science College of Basic Education The Public Authority for Applied Education and Training (PAAET) Kuwait City Kuwait

This paper presents a continuous-time adaptive control scheme for systems with uncertain non-symmetrical deadzone nonlinearity located at the output of a plant. An adaptive inverse function is developed and used in conjunction with a robust adaptive controller to reduce the effect of deadzone nonlinearity. The deadzone inverse function is also implemented in continuous time, and an adaptive update law is designed to estimate the deadzone parameters. The adaptive output deadzone inverse controller is smoothly differentiable and is combined with a robust adaptive nonlinear controller to ensure robustness and boundedness of all the states of the system as well as the output signal. The mismatch between the ideal deadzone inverse function and our proposed implantation is treated as a disturbance that can be upper bounded by a polynomial in the system states. The overall stability of the closed-loop system is proven by using Lyapunov method, and simulations confirm the efficacy of the control methodology.

关键词： Adaptive Inverse Control Output Deadzone Hard Nonlinearity

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Distribution and variability of deformed wing virus of honeybees （Apis mellifera） in the middle East and North Africa

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Insect Science 2017年第1期24卷 103-113页

作者： nizar Jamal Haddad Adjlane Noureddine Banan Al-Shagour Wahida Loucif-Ayad mogbel A. A. El-Niweiri Eman Anaswah Wafaa Abu Hammour Dany El-Obeid Albaba Imad mohamed A. Shebl Abdulhusien Sehen Almaleky Abdullah Nasher Nagara Walid mohamed Fouad Bergigui Orlando Yanez Joachim R. de miranda Bee Research Department National Center for Agriculture Research and Extension Baq'a Jordan Department of Biology M'hamed Bougare University of Boumerdes ENS Kouba Algeries Laboratory of Applied Animal Biology University Badji-Mokhtar Annaba Algeria Department of Bee Research Environment Natural Resources and Desertification Research Institute National Centre for Research Khartoum Sudan Faculty of Agriculture and Veterinary Sciences Lebanese University Beirut Lebanon West Bank State of Palestine HalhuI-Hebron District Palestine Department of Plant Protection Suez Canal University Ismailia Egypt Extension Department Qadysia Govemate Agricultural Directorate Iraq Department of Plant Protection Sana'a University Sane'a Yemen National Federation of Tunisian beekeepers Tunis Tunisia Ruchers El Bakri Hay Assalam-Sidi Slimane Rabat Morocco Institute of Bee Health Vetsuisse Faculty University of Bern Bern Switzerland Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden

Three hundred and eleven honeybee samples from 12 countries in the middle East and North Africa （mENA）（Jordan, Lebanon, Syria, Iraq, Egypt, Libya, Tunisia, Algeria, morocco, Yemen, Palestine, and Sudan） were analyzed for the presence of deformed wing virus （DWV）. The prevalence of DWV throughout the mENA region was pervasive, but variable. The highest prevalence was found in Lebanon and Syria, with prevalence dropping in Palestine, Jordan, and Egypt before increasing slightly moving westwards to Algeria and morocco Phylogenetic analysis of a 194 nucleotide section of the DWV Lp gene did not identify any significant phylogenetic resolution among the samples, although the sequences did show consistent regional clustering, including an interesting geographic gradient from morocco through North Africa to Jordan and Syria. The sequences revealed several clear variability hotspots in the deduced amino acid sequence, which furthermore showed some patterns of regional identity. Furthermore, the sequence variants from the middle East and North Africa appear more numerous and diverse than those from Europe.

关键词： Apis mellifera deformed wing virus middle East North Africa prevalence variability

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Characterization of winged bean (<i>Psophocarpus tetragonolobus</i>(L.) DC.) based on molecular, chemical and physiological parameters

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American Journal of molecular Biology 2013年第4期3卷 187-197页

作者： Chandra Sekhar mohanty Sushma Verma Vinayak Singh Shahina Khan Priyanka Gaur Priya Gupta m. Abdul nizar Nilamani Dikshit Rojalin Pattanayak Alpika Shukla Abhishekh Niranjan Nayan Sahu Soumit Kumar Behera Tikam Singh Rana CSIR-National Botanical Research Institute Rana Pratap Marg Lucknow Uttar Pradesh India National Bureau of Plant Genetic Resources Regional Station Akola Maharashtra India Sanjay Gandhi Institute of Post-Graduate medical Sciences Lucknow Uttar Pradesh India University of Lucknow Lucknow Uttar Pradesh India

Winged bean (Psophocarpus tetragonolobus (L.) DC.) is a potential legume crop of the tropics with high protein and oil content in the seeds. Analysis of the mutual genotypic relationships among twenty four genotypes of P. tetragonolobus through mantel test found a significant correlation (r = 0.839) between similarity matrices of the results obtained from the use of the RAPD and ISSR molecular markers. The UPGmA tree based on Jaccard’s similarity coefficient generated from their cumulative data showed two distinct clusters and seven sub-clusters among these accessions. Quantification of total polyphenols, flavonoids and tannin revealed the highest percentage of occurrence of kaempferol (1.07-790.5 μg/g) and the lowest percentage of gallic acid (0.09-3.49 μg/g) in the seeds. Phytochemical analysis of the winged bean genotypes revealed that, some of the exotic lines are distinct. Analysis of photosynthesis rate, photosynthetic yield and stomatal conductance data also showed two clusters and was in congruence with the phytochemical affinities of the genotypes. The overall high level of polymorphism and varied range of genetic distances across the genotypes revealed a wide range of genetic base of P. tetragonolobus. The present investigation therefore, has provided significant insights for further improvement of winged bean germplasm for its qualitative and quantitative traits.

关键词： Psophocarpus tetragonolobus Polyphenols Flavonoid RAPD ISSR Physiological Parameter

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