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Identification of climatic and environmental factors associated with incidence of cutaneous leishmaniasis in Central Iran using satellite imagery

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Asian Pacific Journal of Tropical Biomedicine 2021年第1期11卷 40-46页

作者： Mohammad Javanbakht Abedin Saghafipour keyvan ezimand Amir Hamta Leyli Zanjirani Farahani Nazanin Soltani Department of Remote Sensing and GIS Faculty of GeographyTehran UniversityTehranIran Department of Public Health Faculty of HealthQom University of Medical SciencesQomIran Department of Remote Sensing and GIS Faculty of Earth ScienceShahid Beheshti UniversityTehranIran Department of Social Medicine Faculty of Medical SciencesQom University of medical sciencesQomIran Department of Medical Parasitology and Mycology School of Public HealthTehran University of Medical SciencesTehranIran Student Research Committee Qom University of Medical SciencesQomIran

Objective:To determine the effect of climatic and environmental factors on the incidence of cutaneous leishmaniasis in Qom province in ***:In this cross-sectional study,the data on cutaneous leishmaniasis incidence were collected from the Disease Control and Prevention Center in Qom *** and environmental data including Normalized Difference Vegetation Index(NDVI),Land Surface Temperature(LST),and soil moisture were extracted using satellite *** of altitude and sunny hours were provided based on shuttle radar topography mission digital elevation model and hemispherical viewshed algorithm,*** associations of climatic and environmental variables with the incidence of the disease were analyzed by Pearson correlation *** Arc GIS 10.3 software was used to determine the geographical distribution of these ***:There were positive correlations between cutaneous leishmaniasis incidence and the two climatic factors:LST and sunny hours per day(P=0.041,P=0.016),and it had weak negative correlations with the digital elevation model(P=0.27),soil moisture(P=0.54),and NDVI(P=0.62).The time delay analysis showed that in one-,two-,and three month periods,the correlations increased with a 95%confidence ***,the correlation with the three-month time delay was positive and relatively strong between the cutaneous leishmaniasis incidence and LST and sunny hours(P=0.027,P=0.02);nevertheless,there were negative correlations between the cutaneous leishmaniasis incidence and the soil moisture(P=0.27)and NDVI(P=0.62).Conclusions:As Qom is located in one of the semi-arid climate zones,topography and solar energy are important factors affecting the incidence of cutaneous leishmaniasis in ***,appropriate disease control programs are recommended.

关键词： Environmental factors Incidence Satellite imagery Cutaneous leishmaniasis Iran

Corrosion and wear resistance of coatings produced on AZ31 Mg alloy by plasma electrolytic oxidation in silicate-based K2TiF6 containing solution:Effect of waveform

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Journal of Magnesium and Alloys 2022年第9期10卷 2574-2587页

作者： Maryam Rahmati keyvan Raeissi Mohammad Reza Toroghinejad Amin Hakimizad Monica Santamaria Department of Materials Engineering Isfahan University of TechnologyIsfahan 84156-83111Iran Yekta Mobaddel Pars Co. Science and Technology CampusYazd UniversityYazd 89158-18411Iran Dipartimento di Ingegneria Università di PalermoViale Delle ScienzeEd.690128PalermoItaly

In this research,plasma electrolytic oxidation coatings were prepared on AZ31 Mg alloy in a silicate-based solution containing K_(2)TiF_(6) using bipolar and soft sparking waveforms with 10,20,and 30%cathodic duty *** coatings displayed a net-like surface morphology consisted of irregular micro-pores,micro-cracks,fused oxide particles,and a sintered *** to the incorporation of TiO_(2) colloidal particles and the cathodic pulse repair effect,most of the micro-pores were ***-term corrosion performance of the coatings was investigated using electrochemical impedance spectroscopy during immersion in 3.5 wt.%NaCl solution up to 14 *** coating grown by the soft sparking waveform with a 20%cathodic duty cycle having the lowest porosity(6.2%)and a sharp layer concentrated in F element at the substrate/coating interface shows the highest corrosion *** friction coefficient of this coating has remained stable during the sliding even under 5 N normal load,showing relatively higher wear resistance than other *** coating produced using the equivalent unipolar waveform,as the reference specimen,showed the highest friction coefficient and the lowest wear resistance despite its highest micro-hardness.

关键词： Plasma electrolytic oxidation Pulsed waveforms AZ31 Mg alloy Dipotassium titanium hexafluoride Corrosion resistance Wear resistance

A Global Best-guided Firefly Algorithm for Engineering Problems

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Journal of Bionic Engineering 2023年第5期20卷 2359-2388页

作者： Mohsen Zare Mojtaba Ghasemi Amir Zahedi keyvan Golalipour Soleiman Kadkhoda Mohammadi Seyedali Mirjalili Laith Abualigah Department of Electrical Engineering Faculty of EngineeringJahrom UniversityJahrom***FrasIran Department of Electronics and Electrical Engineering Shiraz University of TechnologyShiraz***Iran Department of Electrical and Computer Engineering Tarbiat Modares UniversityTehran***Iran Department of Computer Engineering Sari BranchIslamic Azad UniversitySari***Iran Department of Electrical Engineering Urmia BranchIslamic Azad UniversityUrmia571696896Iran Centre for Artificial Intelligence Research and Optimisation Torrens University AustraliaBrisbaneQLD4006Australia Yonsei Frontier Lab Yonsei UniversitySeoul03722South Korea Computer Science Department Prince Hussein Bin Abdullah Faculty for Information TechnologyAl Al-Bayt UniversityMafraq25113Jordan Hourani Center for Applied Scientific Research Al-Ahliyya Amman UniversityAmman19328Jordan Faculty of Information Technology Middle East UniversityAmman11831Jordan School of Computer Sciences Universiti Sains Malaysia11800George TownPulau PinangMalaysia University Research and Innovation Center Obuda University1034BudapestHungary School of Engineering and Technology Sunway University MalaysiaPetaling Jaya27500Malaysia Applied science research center Applied science private universityAmman11931Jordan

The Firefly Algorithm(FA)is a highly efficient population-based optimization technique developed by mimicking the flashing behavior of fireflies when *** article proposes a method based on Differential Evolution(DE)/current-to-best/1 for enhancing the FA's movement *** proposed modification increases the global search ability and the convergence rates while maintaining a balance between exploration and exploitation by deploying the global best ***,employing the best solution can lead to premature algorithm convergence,but this study handles this issue using a loop adjacent to the algorithm's main ***,the suggested algorithm’s sensitivity to the alpha parameter is reduced compared to the original *** GbFA surpasses both the original and five-version of enhanced FAs in finding the optimal solution to 30 CEC2014 real parameter benchmark problems with all selected alpha ***,the CEC 2017 benchmark functions and the eight engineering optimization challenges are also utilized to evaluate GbFA’s efficacy and robustness on real-world problems against several enhanced *** all cases,GbFA provides the optimal result compared to other *** that the source code of the GbFA algorithm is publicly available at https://***/projects/gbfa.

关键词： Firefly algorithm New movement vector Global best-guided firefly algorithm Global optimization Engineering design

Effects of enzymatic and non-enzymatic antioxidants in diluents on cryopreserved bull epididymal sperm

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Asian pacific Journal of Reproduction 2022年第1期11卷 44-50页

作者： Hasan Sakhdary Abbas Farshad Jalal Rostamzadeh Fateme Bahri Binabaj keyvan Sobhani Laboratory of Reproduction Biology Department of Animal SciencesFaculty of AgricultureUniversity of KurdistanSanandajKurdistanIran Department of Animal Sciences Faculty of AgricultureGonbad Kavous UniversityGonbad KavousGorganIran

Objective:To evaluate the supplementation effects of vitamin E,vitamin C,superoxide dismutase(SOD),and catalase to diluents on bull cryopreserved epididymal ***:Sperm were retrieved from 20 bull testes and were then supplemented with 0.1 mM vitamin E,5.0 mM vitamin C,100.0 IU/mL SOD,and 100.0μg/mL catalase alone,or in a *** control treatment contained no *** supplementation,samples were frozen and stored in liquid *** sperm parameters including motility,progressive motility,viability,acrosome integrity,plasma membrane integrity,kinematics and DNA damage were evaluated following the thawing ***:Vitamin E alone significantly increased the parameters of acrosome and membrane integrity compared to the control treatment(P<0.05).While compared to the control treatment,vitamin C had no improvement effect on sperm characteristics except for membrane *** of vitamin E+vitamin C had a significant improvement in total motility,progressive motility,viability,membrane and acrosome integrity compared to the control and other treatments(P<0.05).Compared to the control treatment,addition of SOD or catalase alone significantly improved the percentages of total motility,progressive motility,viability,membrane and acrosome integrity(P<0.05).Furthermore,SOD+catalase significantly increased total motility,progressive motility,viability,acrosome and membrane integrity characteristics compared to the catalase treatment(P<0.05).Vitamin E alone,vitamin E+vitamin C,and SOD in diluents decreased DNA damages and thereby improved the rate of intact sperm ***:Addition of 100.0 IU/mL SOD alone and 0.1 mM vitamin E+5.0 mM vitamin C,and also 5.0 mM vitamin C+100μg/mL catalase in a combination improves the quality of cryopreserved bull epididymal sperm and could be used for cryopreservation.

关键词： Antioxidant Cryopreservation Spermatological characteristics DNA damage Bull Vitamin E Vitamin C Superoxide dismutase Catalase Oxidative stress

A Stable Analytical Solution Method for Car-Like Robot Trajectory Tracking and Optimization

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 39-47页

作者： keyvan Majd Mohammad Razeghi-Jahromi Abdollah Homaifar School of Computing Informaticsand Decision Systems EngineeringArizona State UniversityTempeAZ 85281 USA ABB Corporate Research Center RaleighNC 27606 USA Department of Electrical and Computer Engineering North Carolina A&T State UniversityGreensboroNC 27403 USA

In this paper, the car-like robot kinematic model trajectory tracking and control problem is revisited by exploring an optimal analytical solution which guarantees the global exponential stability of the tracking error. The problem is formulated in the form of tracking error optimization in which the quadratic errors of the position, velocity, and acceleration are minimized subject to the rear-wheel car-like robot kinematic model. The input-output linearization technique is employed to transform the nonlinear problem into a linear formulation. By using the variational approach, the analytical solution is obtained, which is guaranteed to be globally exponentially stable and is also appropriate for real-time applications. The simulation results demonstrate the validity of the proposed mechanism in generating an optimal trajectory and control inputs by evaluating the proposed method in an eight-shape tracking scenario.

关键词： Index Terms—Global asymptotic stability input-output linearization,optimal control trajectory tracking.

A Kernel Function Based Interior-Point Methods for Solving P_*(κ)-Linear Complementarity Problem

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Acta Mathematica Sinica,English Series 2010年第9期26卷 1761-1778页

作者： M.Reza PEYGHAMI keyvan AMINI Department of Mathematics K. N. Toosi University. of Technology School of Mathematics Institute for Research in Fundamental Sciences (IPM) Department of Mathematics Faculty of Sciences Razi University

In this paper, motivated by the complexity results of Interior Point Methods （IPMs） for Linear Optimization （LO） based on kernel functions, we present a polynomial time IPM for solving P.（a）-linear complementarity problem, using a new class of kernel functions. The special case of our new class was considered earlier for LO by Y. Q. Bai et al. in 2004. Using some appealing properties of the new class, we show that the iteration bound for IPMs matches the so far best known theoretical iteration bound for both large and small updates by choosing special values for the parameters of the new class.

关键词： Linear complementarity problem interior-point methods large and small update methods polynomial complexity

Potato Responds to Salt Stress by Increased Activity of Antioxidant Enzymes

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Journal of Integrative Plant Biology 2009年第12期51卷 1095-1103页

作者： keyvan Aghaei Ali Akber Ehsanpour Setsuko Komatsu National Institute of Crop Science Tsukuba 305-8518 Japan Department of Biology Faculty of Sciences University of Isfahan Isfahan *** Iran

To understand the response of potato to salt stress, antioxidant enzyme activities and ion content were analyzed for a sensitive and a tolerant cultivar. Nodal cuttings of the tolerant cultivar, Kennebec, and the sensitive cultivar, Concord, were exposed to media without or with 30, 60, 90 or 120 mmol/L NaCI for 4 weeks. On exposure to NaCI, the length and fresh and dry weight of both shoots and roots of Concord showed greater decrease than those of Kennebec. The decrease in shoot growth was more severe than that of the root for both cultivars. The K^＋ content of shoots and roots of both cultivars was reduced in a dose-dependent manner by exposure to NaCl; the Na^＋ content increased. Activities of ascorbate peroxidase, catalase and glutathione reductase were increased in NaCl-exposed shoots of Kennebec; the corresponding activities in NaCI-exposed shoots of Concord were decreased. Roots of both cultivars showed similar changes in the activities of these enzymes on exposure to NaCI. These studies established that enzyme activities in Concord shoots are inversely related to the NaCI concentration, whereas those in Kennebec do not show a dose dependency, which is also the case for the roots of both cultivars. Our findings suggest that an increase in activity of antioxidant enzymes, such as ascorbate peroxidase, catalase and glutathione reductase, can contribute to salt tolerance in Kennebec, a salt resistant cultivar of potato.

关键词： antioxidant enzyme ion content potato salt resistant cultivar salt stress.

Image compression based on spatial redundancy removal and image inpainting

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第2期11卷 92-100页

作者： Vahid BASTANI Mohammad Sadegh HELFROUSH keyvan KASIRI Department of Electrical and Electronic Engineering Shiraz University of Technology

We present an algorithm for image compression based on an image inpainting method. First the image regions that can be accurately recovered are located. Then,to reduce the data,information of such regions is removed. The remaining data besides essential details for recovering the removed regions are encoded to produce output data. At the decoder,an inpainting method is applied to retrieve removed regions using information extracted at the encoder. The image inpainting technique utilizes partial differential equations (PDEs) for recovering information. It is designed to achieve high performance in terms of image compression criteria. This algorithm was examined for various images. A high compression ratio of 1:40 was achieved at an acceptable quality. Experimental results showed attainable visible quality improvement at a high compression ratio compared with JPEG.

关键词：图像压缩计算方法图像修复技术压缩比

Self-repairing AlO-TiOcoatings fabricated through plasma electrolytic oxidation with various cathodic pulse parameters

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Transactions of Nonferrous Metals Society of China 2023年

作者： Mehri Hashemzadeh keyvan Raeissi Fakhreddin Ashrafizadeh Frank Simchen Amin Hakimizad Monica Santamaria Thomas Lampke Department of Materials Engineering Isfahan University of Technology Yekta Mobaddel Pars Co. Science and Technology Campus Yazd University Materials and Surface Engineering Group Institute of Materials Science and Engineering Chemnitz University of Technology Dipartimento di Ingegneria Università di Palermo Viale Delle Scienze

The influence of cathodic pulse parameters was evaluated on PEO coatings grown on 7075 aluminum alloy in a silicate-based electrolyte containing potassium titanyl oxalate (PTO) using pulsed bipolar waveforms with various cathodic duty cycles and cathodic current densities. The coatings were characterized by SEM， EDS， and XRD. EIS was applied for investigating the electrochemical properties. It was observed that the increase of cathodic duty cycle and cathodic current density from 20% and 6 A dm-2to 40% and 12 A dm-2enhances the growth rate of the inner layer from 0.22 μm min-1to 0.75 μm min-1. Adding PTO into the bath showed a fortifying effect on influence of the cathodic pulse and the mentioned change of cathodic pulse parameters resulted in an increase of the inner layer growth rate from 0.25 to 1.10 μm min-1. Based on EDS analysis， Si and Ti were incorporated dominantly in the upper parts of the coatings. XRD technique merely detected γ-Al2O3， and there were no detectable peaks related to Ti and Si compounds. However， the EIS results confirmed that the incorporation of Ti4+into alumina changed the electronic properties of the coating. The coatings obtained from the bath containing PTO using the bipolar waveforms with a cathodic duty cycle of 40% and current density values higher than 6 A dm-2showed highly appropriate electrochemical behavior during 8 months of immersion due to an efficient repairing mechanism. Regarding the effects of studied parameters on the coating properties， the roles of cathodic pulse parameters and PTO in the PEO process were highlighted.

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