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Chinese Chemical Letters 2010年第11期21卷 1283-1286页

作者： ali reza Pourali Fatemeh Fatemi School of Chemistry Damghan University of Basic Sciences

A mild,efficient and regioselective method for the mononitration of phenolic compounds is described using bismuth subnitrate/ charcoal in the presence of trichloroisocyanuric acid in CH2Cl2 at room temperature.

关键词： Nitration Phenol Bismuth subnitrate Supported reagent

Direct Iodination of Aromatic Compounds with Polyvinylpyrrolidone Supported Hydrogen Peroxide （PVP-H2O2） and Potassium Iodide or Molecular Iodine

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Chinese Journal of Chemistry 2006年第8期24卷 1077-1079页

作者： POURali, ali reza GHANEI, Mersieh Department of Chemistry Damghan University of Basic Sciences Damghan Iran

Hydrogen peroxide was supported on polyvinylpyrrolidone to afford a stable and mild oxidizing reagent. Activated aromatic compounds were reacted with PVP-H2O2 in the presence of KI or I2 and a catalytic amount of H3PW... 详细信息

关键词： iodinated aromatic compounds iodination hydrogen peroxide supported reagents

Evaluation of sediment yield in PSIAC and MPSIAC models by using GIS at Toroq Watershed, Northeast of Iran

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Frontiers of Earth Science 2012年第1期6卷 83-94页

作者： Mohammad reza Mansouri Daneshvar ali Bagherzadeh Department of Geography Mashhad Branch Islamic Azad University Mashhad Iran Department of Agriculture Mashhad Branch Islamic Azad University Mashhad Iran

Regarding the importance of watersheds in arid and semi-arid regions, it is necessary to better protect water supplies such as dam reservoirs. The most efficient way of conserving water sources is to apply proper management to decrease erosion and sedimentation. The first step of this process is to be aware of sediment yield （Qs）/production and identify erosive zones in upper reach of reservoirs. The present study aims to evaluate Qs and production in Pacific Southwest Inter-Agency Committee （PSIAC） and mod- ified PSIAC （MPSIAC） models by using satellite data, GIS analysis, and field observations. According to the results, the study area can be categorized into five erosive classes： very high, high, moderate, low and negligible. The east part of the watershed is slightly eroded due to its hard surface geology and relatively flat topography characteristics, while the northern and southern parts of the basin are highly eroded because of the high erodibility potential of soil and intensive cultivation of the area. A comparison of the output maps from PSIAC and MPSIAC models showed that the calculated Qs in most parts correspond well in both models and with field observa- tions. The results of regression between main determining factors （surface geology, soil, topography and land cover） and Qs derived from each model indicated moderate to strong correlation coefficient （R2 = 0.436-0.996 to 0.893- 0.998） after PSIAC and MPSIAC models, respec- tively.

关键词： evaluation of sediment yield (Qs) erodiblefactors Pacific Southwest Inter-Agency Committee(PSIAC) and modified PSIAC (MPSIAC) models sedimentproduction GIS Toroq Watershed Northeast of Iran

A low-power and low-energy flexible GF(p) elliptic-curve cryptography processor

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第9期11卷 724-736页

作者： Hamid reza AHMADI ali AFZali-KUSHA School of Electrical and Computer Engineering University of Tehran

We investigate the use of two integer inversion algorithms,a modified Montgomery modulo inverse and a Fermat's Little Theorem based inversion,in a prime-field affine-coordinate elliptic-curve *** perform this,we present a low-power/energy GF(p) affine-coordinate elliptic-curve cryptography(ECC) processor design with a simplified architecture and complete flexibility in terms of the field and curve *** design can use either of the inversion *** on the implementations of this design for 168-,192-,and 224-bit prime fields using a standard 0.13 μm CMOS technology,we compare the efficiency of the algorithms in terms of power/energy consumption,area,and calculation *** results show that while the Fermat's theorem approach is not appropriate for the affine-coordinate ECC processors due to its long computation time,the Montgomery modulo inverse algorithm is a good candidate for low-energy *** results also show that the 168-bit ECC processor based on the Montgomery modulo inverse completes one scalar multiplication in only 0.4 s at a 1 MHz clock frequency consuming only 12.92 μJ,which is lower than the reported values for similar designs.

关键词： Elliptic-curve cryptography(ECC) Prime field Montgomery multiplication Montgomery inverse Low-energy

A new integrated approach to resolve the saturation profile using high-resolution facies in heterogenous reservoirs

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Petroleum 2022年第3期8卷 318-331页

作者： Abdelrahman Elkhateeb reza rezaee ali Kadkhodaie WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerthAustralia Earth Sciences Department Faculty of Natural SciencesUniversity of TabrizTabrizIran

The saturation calculation in complex reservoirs remains a major challenge to the oil and gas *** simple formations,a tendency towards simple saturation models such as Archie or Simandoux for clean and shaly reservoirs respectively is always *** models were found to be working effectively in homogeneous formations within which the porosity and permeability are linked in the light of a simple facies *** the rocks show some degrees of heterogeneity,the well-logs are usually affected by different *** adversely results in a compromised or averaged log profiles that may affect the saturation *** wells drilled across a shaly sand of high heterogeneity have been studied in the Perth Basin,Western *** aim is to resolve the hydrocarbon saturation and explain the high productivity results,despite the high water saturation,obtained through a conducted formation well test across the interested reservoir zones.A new integration technique between a suite of conventional and advanced logging tools together with the capillary pressure measurements has been carried out to generate a high-resolution reservoir saturation profile,that is lithofacies *** different independent methods were used in the studied wells to calculate the saturation and to reduce the uncertainty of the final estimated *** methods are the resistivity-based saturation,the NMR-based irreducible saturation,and a new application through saturation height ***,through the workflow,an effective calibration for the magnetic resonance T2 cutoff has been applied that is supported by the excellent reservoir production behavior from such complex *** methodology will help resolve the saturation calculation as one of the most challenging reservoir parameters,particularly where the resistivity logs are affected in complicated shaly sand *** effectiveness of the workflow shines the possibility to predict h

关键词： Reservoir facies Permeability Hydraulic flow units Formation evaluation Shaly sand Saturation height modeling

Computation of the structure of a magnetized strange quark star

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Research in Astronomy and Astrophysics 2011年第7期11卷 851-862页

作者： Gholam Hossein Bordbar ali reza Peivand Department of Physics Shiraz University Research Institute for Astronomy and Astrophysics of Maragha Department of Physics Tafresh University

We have calculated some properties of spin polarized strange quark matter（SQM） in a strong magnetic field at zero temperature using the MIT bag *** showed that the equation of state of spin polarized SQM is stiffer than that for unpolarized *** have also computed the structural properties of a spin polarized strange quark star（SQS） and found that the presence of a magnetic field leads to a more stable SQS when compared to the structural properties of an unpolarized SQS.

关键词： dense matter—equation of state—magnetic field

Tree-Temperature Monitoring for Frost Protection of Orchards in Semi-Arid Regions Using Sprinkler Irrigation

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Agricultural Sciences in China 2009年第1期8卷 98-107页

作者： ali Asghar Ghaemi Mohammad Rafie Rafiee ali reza Sepaskhah Irrigation Department College of AgricultureShiraz University

Automated over-tree sprinkler irrigation systems were developed and tested in two orchards located in two separate locations in southern Iran （a 0.17 ha peach orchard and a 0.24 ha orange orchard） to protect peach blossoms and orange trees leaves and fruits from low temperature damage. The experiment used a system that monitored the trees and air temperatures using two thermistors. The water application rate by the irrigation system was determined by an energy balance as implemented by the software FROSTPRO, In the peach orchard, the system was tested during three frost events during the spring of 2003 and three other events during the spring of 2004. The system successfully kept peach flowers above the critical temperature, i.e., -4.0℃ in spring 2004 （control block -4.12℃, and sprinkled block ＋0.5℃） during all events. Similar results were obtained in the orange orchard during three frost events in the winter of 2004, during which the tree temperatures were at least 2.5℃ above the critical temperature. Results from field tests show that the system can effectively protect the peach blossoms from damage. Determination done after the frost events showed a 12% blossom kill in the sprinkled blocks while in the unsprinkled control block a 41.5% blossom kill. Calculations indicated that when using variable application rates, the amount of water used can be reduced by 54.3%. Spatial distribution of minimum temperatures during the three frosts was also studied in Jahrom, Iran. Results showed a significant temperature control in the experimental block, especially in the central part of the orchard, but the block margins （about 3.6% of the total area） were at the risk of low temperature due to the wind drift effects.

关键词： automated sprinkler irrigation FROSTPORO frost protection peach orchard orange orchard

Evaluation of the Iranian guideline for deismic rehabilitation of existing buildings

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Earthquake Engineering and Engineering Vibration 2006年第2期5卷 297-307页

作者： ali reza Keyvani Boroujeni Majid Sadeghazar University of Tehran Iran

The Iranian Guideline for Seismic Rehabilitation of Existing Buildings （GSREB）, which is currently used for vulnerability assessment of existing buildings in Iran, is evaluated in this paper. The vulnerability of sample buildings of a variety stories with special steel moment resisting frames, designed according to the Standard No.2800 requirements, is assessed by GSREB. In the vulnerability assessment, different analysis methods were used and the results, in terms of usage ratio, defined as the ratio of the strength/deformation demand to the corresponding capacity, are compared. Numerical results show that some columns of these buildings do not satisfy the life safety performance criteria in the design hazard level. Moreover, the target displacement estimated by the Displacement Coefficient Method （DCM） is larger than the maximum displacement calculated by nonlinear dynamic analysis.

关键词： FEMA 356 vulnerability assessment Standard No.2800 performance-based procedures GSREB displacement coefficient method

Study on gamma-ray attenuation characteristics of some amino acids for 133Ba,137Cs, and 60Co sources

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Nuclear Science and Techniques 2020年第2期31卷 67-81页

作者： reza Bagheri ali Yousefi Seyed Pezhman Shirmardi Northwest Research Complex(Bonab) Radiation Applications Research SchoolNuclear Science and Technology Research InstituteTehranIran Materials and Nuclear Fuel Research School Nuclear Science and Technology Research InstituteTehranIran Radiation Applications Research School Nuclear Science and Technology Research InstituteTehranIran

Amino acids are the building blocks of proteins,which are the most abundant macromolecules in living *** the standpoint of the photon interaction cross sections of amino acids,the mass attenuation coefficients,half and tenth value layers,mean free path,effective atomic and electronic cross sections,effective atomic number,and effective electron density of fifteen essential amino acids have been determined for 133Ba,137Cs,and 60Co gamma-ray *** MCNP-4C code and the XCOM program have been used to calculate these *** results have been compared to the available experimental and theoretical *** theoretical results agreed with the experimental data,with RD values of ≤±7%.In the energy region of 81-1332.5 keV,it was found that the μm,σa,and revalues of the amino acids decreased as the photon energy increased,and the increasing density of amino acids had no steady effect on these ***,results demonstrated that the HVL,TVL,and MFP values increased with the increase in photon *** μm,σa,and Zeff values of aspartic acid were the highest among those of all amino acids,and they were the lowest for *** Zeff value of each sample containing H,C,N,and O atoms was nearly constant in the studied energy *** Neffvalues of the studied amino acids varied in the range of 3.14×10^23-3.44×10^23 electron/***,the Neffvalues were approximately independent of the amino acid type in this energy region.

关键词： Amino acids Mass attenuation coefficient Effective electron density and atomic number MCNP-4C XCOM

Symmetry properties of tetraammine platinum(II) with C_(2v) and C_(4v) point groups

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2005年第3期6卷 222-226页

作者： MOGHANI Ghorban ali ASHRAFI ali reza HAMADANIAN Masood Department of Mathematics Payame Noor University Tehran IranDepartment of MathematicsUniversity of Kashan Kashan IranDepartment of Chemistry University of Kashan Kashan Iran

Let G be a weighted graph with adjacency matrix A=[aij]. An Euclidean graph associated with a molecule is defined by a weighted graph with adjacency matrix D=[dij], where for i≠j, dij is the Euclidean distance between the nuclei i and j. In this matrix dii can be taken as zero if all the nuclei are equivalent. Otherwise, one may introduce different weights for different nuclei. Balasubramanian (1995) computed the Euclidean graphs and their automorphism groups for benzene, eclipsed and staggered forms of ethane and eclipsed and staggered forms of ferrocene. This paper describes a simple method, by means of which it is possible to calculate the automorphism group of weighted graphs. We apply this method to compute the symmetry of tetraammine platinum(II) with C2v and C4v point groups.

关键词： Weighted graph Euclidean graph Tetraammine platinum(II)