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Multiple Uses of Rangelands in Alborz Mountain （Iran）

Journal of Agricultural Science and Technology(A) 2012年第2期2卷 246-251页

作者： Roja Safaeian hosein arzani hosein Azamivand Nosratolah Safaeian Department of Desert Region Management University of Shiraz Shiraz Fars Iran Department of Mountainous Region Revival University of Tehran Karaj Tehran Iran Department of Rangeland Management University of Mazandaran Sari Mazandaran Iran

The most precious ecological function of rangelands is the conservation of soil and water as well as supplying forage for domestic and wild animals. Such an ecological bio habitat, or in the other words the profession of rangelands, has been subject to disorders for the variety of reasons since many years ago. Floods, hungry animals and desertification are the consequences of such disorders. Therefore, the rangeland managers have suggested the multiple usages of rangelands based on their existing talent and efficiency which is called ＂rangeland suitability＂. In this research, based on bio-diversity potentials of the region, the recognition and functions of plants of Alborz Mountain rangelands have been considered as rangeland management tools. The sampling has been carried out in work units （combination of traditional systems in plant types） randomly-systematically by setting ten 50 m transects and putting down a metal bar. In this way, the relative frequency of medicinal and nectarous rangeland plants in work units has been evaluated. Planning for multiple usage of rangelands were performed based on two criteria of suitability of medicinal and nectarous plants, 1991 Food and Agriculture Organization （FAO） method, and using Geographical Information Systems （GIS） with the scale of 1：50,000. The best-growing habitat of the plants was selected based on the modeling. By proving the existence of environmental gradient, one can recommend the above methods to study the environmental factors as complementary to incarnation models theories.

关键词： Suitability of rangeland model multiple uses Alborz Mountain FAO.

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PID-type Terminal Sliding Mode Control for Permanent Magnet Synchronous Generator-based Enhanced Wind Energy Conversion Systems

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CSEE Journal of Power and Energy Systems 2022年第4期8卷 993-1003页

作者： Mojtaba Nasiri Saleh Mobayen Ali arzani the Solar Energy Applications Group Trinity College DublinDublin 2D02 PN40Ireland Department of Electrical Engineering University of ZanjanZanjanIran the Future Technology Research Center National Yunlin University of Science and TechnologyDouliuYunlin County 64002TaiwanChina the Center for Energy Systems Research(CESR) Tennessee Technological UniversityCookevilleTN 38505USA

The provision of wind farm(WF)grid codes(GCs)has become imperative for sustained grid operations,especially for WFs with permanent-magnet synchronous generator(PMSG)wind energy conversion *** techniques have been developed for executing GC requirements in the event of grid *** the methods,an intriguing strategy is to enhance the performance of back-to-back(BTB)converter *** this research,the PID-type terminal sliding mode control(PID-TSMC)scheme is implemented for both machine-side and grid-side converter-modified controllers of BTB-converter,to reinforce the nonlinear relationship among the state-variable and the control *** application of this control scheme decreases the response time and improves the robustness of the BTB-converter controllers regarding uncertainty of parameters and external *** grid-side converter tracks the maximum power point,contributing to the rapid decrease of generator active power output during *** frees up converter capacity for injecting GC-compliant reactive current into the ***,the machine-side converter regulates DC-link voltage,in which its variations during external disturbances decrease substantially with the *** discussions on the simulations contemplate on the robustness and efficiency of the implemented PID-TSMC strategy in comparison to other BTB-converter control strategies.

关键词： Back-to-back converter grid code PMSG-based wind turbine terminal sliding mode control

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Equilibrium and Kinetic Adsorption Study of the Removal of Orange-G Dye Using Carbon Mesoporous Material

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无机材料学报 2012年第6期27卷 660-666页

作者： KAVEH arzani BEHDAD Ghaderi Ashtiani AMIRHOSSEIN Haji Aboutorab Kashi Department of Materials Engineering Science and Research BranchIslamic Azad UniversityTehran 14515/775Iran

Mesoporous carbon CMK-3 was synthesized by using SBA-15 silica mesoporous as hard template and characterized through nitrogen adsorption/desorption and low angle X-ray ***-prepared material with large pores and high surface area was used to remove Orange G dye from aqueous *** experiments were carried out as batch studies at variety of contact times,pH,initial dye concentrations,temperatures and salt *** and Freundlich isotherm models were employed to simulate the equilibrium data of anionic *** was found that the equilibrium data were well represented by the Langmuir isotherm,yielding maximum monolayer adsorption capacity of 189 mg/*** data were analyzed using pseudo-first order and pseudo-second order kinetic models and obtained results indicated that kinetics followed a pseudo-second order equation.

关键词：摘要编辑部编辑工作读者

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Microwave assisted synthesis & properties of nano HA-TCP biphasic calcium phosphate

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International Journal of Minerals,Metallurgy and Materials 2012年第5期19卷 441-445页

作者： E.Ghomash Pasand A.Nemati M.Solati-Hashjin K.arzani A.Farzadi Department of Materials Engineering Science and Research BranchIslamic Azad UniversityTehran ***Iran Department of Biomedical Engineering Amirkabir University of TechnologyTehran 158754413Iran

Biphasic calcium phosphate （BCP） nanopowders were synthesized by using microwave and non-microwave irradiation assisted processes. The synthesized powders were pressed under a pressure of 90 MPa, and then were sintered at 1000-1200℃ for 1 h. The mechanical properties of the samples were investigated. The formed phases and microstructures were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The results showed that the synthesis time was shorter, along with a more homogeneous microstructure, when the microwave irradiation assisted method was applied. The compression strength and the Young＇s modulus of the samples synthesized with microwave irradiation were about 60 MPa and 3 GPa, but those of the samples synthesized without microwave irradiation were about 30 MPa and 2 GPa, respectively. XRD patterns of the microwave irradiation assisted and non-microwave irradiation assisted nanopowders showed the coexistence of hydroxyapatite （HA） and lricalcium phosphate （TCP） phases in the system.

关键词： bioceramics calcium phosphate hydroxyapatite (HA) Wicalcium phosphate nanoparticles (TCP) mechanical properties microwave irradiation

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Lithostratigraphy and Microbiostratigraphy of Gadvan and Darian Formations in South Semirom, East of Zagros Basin, South-Central Iran

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Open Journal of Geology 2017年第2期7卷 119-131页

作者： Mohammad Kazem Hamedanian Seyed Hamid Vaziri Mahnaz Amir Shakarami Mehran Arian Naser arzani Department of Geology Science and Research Branch Islamic Azad University Tehran Iran Department of Geology North Tehran Branch Islamic Azad University Tehran Iran Department of Geology Payam Noor University Isfahan Iran

This research focuses on the lithostratigraphy and microbiostratigraphy implications of the Gadvan and Darian Formations in a part of Zagros sedimentary basin. The Gadvan and Darian Formations in the study area with a thick-ness of 520 meters consist of gray to green marls and shales, dark-grey limestones and Orbitolina limestone with Late Barremian-Aptian age. According to the lithostratigraphic investigations, the Gadvan and Darian Formations in the study area are subdivided into eleven units. The upper boundary of the Darian Formation with the Kazhdomi Formation and the lower boundary of Gadvan Formation with the Fahliyan Formation are in the form of disconformity. Micropaleontological study of the Gadvan and Dariyan Formations has led to the recognition 20 families, 45 genera, 35 species of benthic foraminifera, 2 genera of pelagic foraminifera and 8 genera and species of the calcareous algae. In this research, three biozones have been recognized by distribution of the larger benthic foraminifera in the Gadvan and Dariyan Formations of the South Semirom, including: 1) Palorbitolina lenticularis-Choffatella decipiens Concurrent Range Zone (middle Late Barremian to early Early Aptian);2) Praeorbitolina cormyi-Orbitolina (Mesorbitolina) lotzei Assemblage Zone (late Early Aptian);3): Orbitolina (Mesorbitolina) texanae-Orbitolina (Mesorbitolina) parva Assemblage Zone (Middle to Late Aptian). Based on the identified foraminifera, the age of the Gadvan and Darian Formations in the study area is assigned to Late Barremian to Aptian.

关键词： Lower Cretaceous Foraminifera Gadvan Darian Biozone Zagros Semirom

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Microfacies, Sedimentary Environment and Sequence Stratigraphy of Gadvan and Darian Formations in the Zagros Basin, South of Semirom, Iran

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Open Journal of Geology 2016年第9期6卷 1169-1186页

Gadvan and Darian formations are in the upper part of Khami group that has been deposited in the highland Zagros zone and the southern Margin of Neotethys. These formations outcrop in the south of Semirom (Agh-Dagh Mountain) consist of Orbitolina limestones and marly limestones with a Late Barremian-Aptian age and thickness of 520 meters. Based on field characteristics, petrographic and texture of facies, these rocks consist of Oregonian facies (Urgonian facies) with 12 carbonate microfacies which are deposited in Lagoon, barrier and shallow open marine. The absence of loss and flows of turbidities indicates that carbonate platform of Gadvan and Darian formations in the studied area are (Hmoklinal) platform type. Abundance of rudist (bivalves) and Peloid markers show that there is a Photozoan collection in tropical climates. In the above sedimentary succession, from a sequence stratigraphic perspective, three sedimentary cycles were recognized which deposited in a platform model. The Gadvan Formation overlies on Fahliyan Formation disconformable and is covered by Darian Formation gradual with reducing the amount of marl and increase of limestone. The Kazhdumi Formation is exposed disconformably with hematite nodules and oxidized sediments over the Darian Formation. On the basis of petrographic studies, diagenetic process of Gadvan and Darian formations in the study area includes cementation, the physical and chemical density and replacement processes such as pyritation, ironies and silica. Porosity observed in the study area is mainly inter-granular porosity type, modular and vaggy.

关键词： Zagros Gadvan Darian Cretaceous Sequence Stratigraphy

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