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One-pot multicomponent synthesis of novel tricyclic pyrrolo[2,1-c][1,4]benzoxazines

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Chinese Chemical Letters 2014年第2期25卷 234-236页

作者： Mohammad Piltan Loghman Moradi Seyed Amir zarei Hedieh Rostami Department of Chemistry Sanandaj BranchIslamic Azad University Department of Chemistry Faculty of ScienceUniversity of Kurdistan

A simple and efficient synthetic protocol has been developed using a one-pot multicomponent reaction （MCR） involving 2-aminophenols, dialkyl acetylenedicarboxylates, and ethyl bromopyruvate in poly（ethyleneglycol）... 详细信息

关键词： Pyrrolo[2,1-c]benzoxazines Dialkyl acetylenedicarhoxylates 2-Aminophenols Ethyl bromopyruvate

Gardaneh Salavat porphyry copper system: Is it about metal endowment or fertility of the porphyritic intrusion?

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Acta Geochimica 2022年第3期41卷 496-514页

作者： Seyyed reza Mashhadi Department of Geoscience Aarhus UniversityHøeghGuldbergs Gade 28000 Aarhus CDenmark

Gardaneh Salavat porphyry copper system is located in the northwest of Iran. It comprises a quartz diorite to diorite porphyritic intrusion that created extensive alteration haloes in the host rocks. Despite all technical considerations, the exploration activities did not yield to ore discovery. As the matter of fact, all of the geological,geophysical, and geochemical characteristics of a porphyry Cu-Au deposit exist but there is no economic mineralization. Detailed examinations suggest that the only reasonable explanation can be related to the infertility or low metal endowment of the porphyritic intrusion. The reasons include(1) anomalous ranges of Cu, Au, and Mo rather than economic ore grades,(2) weakly development of potassic alteration,(3) probably sulfur saturation of magma that occurred before intrusion emplacement in the host rocks, and(4) probably low metal endowment in the regional scale and the lack of known porphyry copper deposits in close neighborhoods. It is tried to test the proposed hypothesis with the introduced fertility indicators based on major and trace element geochemistry. However,current fertility indicators could not prove or reject the proposed hypothesis for Gardaneh Salavat porphyritic intrusion because of the high-K calc-alkaline to shoshonitic nature of the intrusive rocks together with the unavailability of relatively fresh/unaltered samples. This case study is notable to examine because(1) it shows that characterization of fertile from barren intrusions seems to be as important as vectoring towards concealed porphyry copper deposits, especially while dealing with deep exploration targets that are associated with high financial risks, and(2) it highlights the inefficiencies and uncertainties in introduced magma fertility indicators for porphyry copper intrusions. As a result, it is of high importance to conduct an overarching investigation on other possible fertility indicators as a fundamental need for the future of the exploration

关键词： Porphyry Copper Fertility Metal endowment Barren intrusion

Evaluation of attraction terms in equations of state on the prediction of solubility of some biomolecules in supercritical carbon dioxide

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Chinese Chemical Letters 2009年第4期20卷 501-505页

作者： Mohammad reza Bozorgmehr Mohammad reza Housaindokht Department of Chemistry Faculty of Science.Islamic Azad UniversityMashad BranchMashhadIran Department of Chemistry Faculty of ScienceFerdowsi University of MashhadMashadIran

In the present work, effect of the attraction terms of four recently modified Peng-Robinson （MPR） equations of state on the prediction of solubility of caffeine, cholesterol, uracil and erythromycin was studied. The attraction terms of two of these equations are linear relative to the acentric factor and for the other two are exponential. It is found that the later show less deviation. Also interaction parameters for the studied systems are obtained and the percentage of average absolute relative deviation （%AARD） in each calculation is displayed.

关键词： Equation of state Solubility Supercritical carbon dioxide Biomolecules

Reinforcement selection for deep and high-stress tunnels at preliminary design stages using ground demand and support capacity approach

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International Journal of Mining Science and Technology 2018年第4期28卷 571-580页

作者： reza Masoudi Mostafa Sharifzadeh Department of Mining&Metallurgical Engineering Curtin University Western Australian School of Mines(WASM)Perth 6102Australia

Underground mining is going to be deeper gradually because near surface resources are going to be depleted. Therefore, risk of seismic events in underground mines is escalating. Additionally, existence of the large ratio of horizontal to vertical stress, could be a potential reason for high-stress condition and occurrence of dynamic activities. Depending on various parameters such as the level of induced stress, rock properties, etc., ground demand changes and it is difficult to estimate. On the other hand,under seismic condition, energy dissipation and deformation capacity of supports is the most important factors, however, rock support performance factors in dynamic conditions are still under *** the knowledge of reinforcement behaviour and capacity, specifically that of the rockbolt as a primary element in seismic conditions, would help to develop a suitable, safe and economic support design. This paper contains various methods to estimate ground demand including the intact rock properties approach, failure thickness and ejection velocity estimation, and rockburst damage potential method. It also covers measurement methods of rockbolts energy dissipation capacities such as drop test,blasting simulating, back calculation and momentum transfer measurement methods. A large-scale dynamic test rig is also explained. Based on the findings, a table and a graph to show the applicable range of each type of rockbolts were presented. Suitable rockbolt types for various ground energy demand and deformation capacity range were categorised in the table and the graph. The presented support selection method facilitates the selection of a suitable reinforcement system at the preliminary stages of design and guides the designer to adjust the support reinforcement system based on observed ground and support reaction.

关键词： High-stress tunnels Support system Ground demand Reinforcement capacity Rockbolt

Proportional integral derivative controller design using Legendre orthogonal functions

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Journal of Central South University 2016年第10期23卷 2616-2629页

作者： reza Moradi Mohammad Tabatabaei Department of Electrical Engineering Khomeinishahr Branch Islamic Azad University

The Legendre orthogonal functions are employed to design the family of PID controllers for a variety of plants. In the proposed method, the PID controller and the plant model are represented with their corresponding Legendre series. Matching the first three terms of the Legendre series of the loop gain with the desired one gives the PID controller parameters. The closed loop system stability conditions in terms of the Legendre basis function pole(λ) for a wide range of systems including the first order, second order, double integrator, first order plus dead time, and first order unstable plants are obtained. For first order and double integrator plants, the closed loop system stability is preserved for all values of λ and for the other plants, an appropriate range in terms of λ is obtained. The optimum value of λ to attain a minimum integral square error performance index in the presence of the control signal constraints is achieved. The numerical simulations demonstrate the benefits of the Legendre based PID controller.

关键词： PID controllers orthogonal functions legendre functions moment matching PI controller PD controller

Effects of some Nitrogen Bases on the Oxygenation of Tetralin with Sodium Periodate Catalyzed by Manganese（Ⅲ）meso- Tetraphenylporphyrin as a Model Compound of Cytochrome P-450

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Chinese Journal of Chemistry 2007年第7期25卷 1031-1035页

作者： reza, Tayebee Department of Chemistry Sabzevar Teacher Training University Sabzevar 397 Iran

The effect of some nitrogen bases on the oxygenation of tetralin by sodium periodate, catalyzed by Mn（TPP）OAc, was evaluated. A series of eight bases, including imidazole, pyridine, and quinuclidine, was used. Binding of axial ligand to the four-coordinate Mn（Ⅲ）-center influenced the efficiency and selectivity of the catalytic oxygenation system.

关键词： nitrogen donor sodium periodate oxidation manganese porphyrin tetralin

Nonlocal vibration analysis of circular double-layered graphene sheets resting on an elastic foundation subjected to thermal loading

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Acta Mechanica Sinica 2016年第5期32卷 841-853页

作者： reza Ansari Jalal Torabi Department of Mechanical Engineering University of Guilan

Based on the nonlocal elasticity theory, the vibration behavior of circular double-layered graphene sheets（DLGSs） resting on the Winkler- and Pasternak-type elastic foundations in a thermal environment is *** governing equation is derived on the basis of Eringen＇s nonlocal elasticity and the classical plate theory（CLPT）.The initial thermal loading is assumed to be due to a uniform temperature rise throughout the thickness direction. Using the generalized differential quadrature（GDQ）method and periodic differential operators in radial and circumferential directions, respectively, the governing equation is discretized. DLGSs with clamped and simply-supported boundary conditions are studied and the influence of van der Waals（vd W） interaction forces is taken into *** the numerical results, the effects of various parameters such as elastic medium coefficients, radius-to-thickness ratio,thermal loading and nonlocal parameter are examined on both in-phase and anti-phase natural frequencies. The results show that the thermal load and elastic foundation respectively decreases and increases the fundamental frequencies of DLGSs.

关键词： Circular DLGS Vibration Nonlocal theory Thermal environment Numerical solution

Dynamic characteristics of bubbling fluidization through recurrence rate analysis of pressure fluctuations

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Particuology 2013年第3期11卷 282-287页

作者： Hossein Sedighikamal reza Zarghami Multiphase Systems Department Oil and Gas Processing Centre of ExcellenceSchool of Chemical EngineeringCollege of EngineeringUniversity of Tehran

Pressure fluctuations signals of a lab-scale fiuidized bed （15 cm inner diameter and 2 m height） at different superficial gas velocities were measured. Recurrence plot （RP） and recurrence rate （RR）, and the simplest variable of recurrence quantification analysis （RQA） were used to analyze the pressure signals. Different patterns observed in RP reflect different dynamic behavior of the system under study. It was also found that the variance of RR （a2R） Could reveal the peak dominant frequencies （PDF） of different dynamic systems： completely periodic, completely stochastic, Lorenz system, and fluidized bed. The results were compared with power spectral density. Additionally, the diagram of σ^2RR provides a new technique for prediction of transition velocity from bubbling to turbulent fluidization regime.

关键词： Pressure fluctuations Fluidization Recurrence rate Peak dominant frequency Transition velocity Power spectral density

Exact Solutions of the Harry-Dym Equation

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Communications in Theoretical Physics 2011年第2期55卷 204-208页

作者： reza Mokhtari Department of Mathematical Sciences Isfahan University of Technology

The aim of this paper is to generate exact travelling wave solutions of the Harry-Dym equation through the methods of Adomian decomposition, He＇s variational iteration, direct integration, and power series. We show t... 详细信息

关键词： Harry-Dym equation exact travelling wave solution Adomian decomposition method variational iteration method direct integration method power series method