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Study the operating conditions on agglomeration of RDX particles in anti-solvent crystallization by using statistical optimization

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Defence Technology（防务技术） 2019年第2期15卷 233-240页

作者： Hamid reza Pouretedal Sajjad Damiri ali Zandi Department of Chemistry Faculty of Science Malek-Ashtar University of Technology

The unfavorable growth and agglomeration of micro-particles of RDX explosive was almost observed in manufacture process. For preventing of growth of micro-particles and agglomeration in anti-solvent crystallization process, the effect of additives glucose, sucrose and poly ethylene glycol-2000 and wetting solvent of isopropyl alcohol were studied. Taguchi experimental design was used for optimization of the operating conditions. The type of additive, the amount of additive(%wt.), solvent of wetting and wetting time were selected for optimization of the conditions. By using 4 factor and 3 levels, 27 experiments were conducted(L27). Results showed that in the presence of 2 %wt. of sucrose additive and isopropyl alcohol solvent, the agglomerations of particles were decreased so that a decrease 30-50% in the average of particles size was seen. Addition additives were effective in storage container and for reduce the agglomeration of particles during storage. Also, the agglomeration rate of particles was reduced over time at optimized conditions. Imaging optical microscopy, scanning electron microscopy(SEM), and particle size analyzer(PSA) methods were used for particles size analyzing as a response in statistical optimization and quality control of the final product. The sensitivity to some mechanical and shock stimuli on the RDX in presence of sucrose additive was tested and the obtained results showed the insignificant effect of additive on the safety properties of pure RDX.

关键词： RDX explosive Taguchi experimental design Agglomeration Additive Anti-solvent

Synthesis and Infrared Spectra Computation of Sterically Congested 2,2-Disubstituted Indane-1,3-dione Derivatives

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Chinese Journal of Structural Chemistry 2011年第4期30卷 568-574页

作者： Seyed Mohammad Shoaei ali reza Kazemizadeh ali Ramazani Department of Chemistry Islamic Azad UniversityZanjan Branch

Sterically congested 2,2-disubstituted indane-1,3-dione derivatives have been syn-thesized and characterized by 1H NMR,13C NMR,FT-IR and elemental *** B3LYP/HF calculations for computation of IR spectra have been carried out for the title compounds at the 6-31G and 6-311＋＋G basis set *** vibrational frequencies have been assigned and compared with the experimental FT-IR spectra and they are supported each other.

关键词： vibrational frequency DFT HF FT-IR spectra 2 2-disubstituted indane-1 3-dione isocyanide

A Risk-based Competitive Bi-level Framework for Operation of Active Distribution Networks with Networked Microgrids

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Journal of Modern Power Systems and Clean Energy 2021年第5期9卷 1121-1129页

作者： Himan Hamedi Vahid Talavat ali Tofighi reza Ghanizadeh Department of Electrical Engineering Urmia BranchIslamic Azad UniversityUrmiaIran Department of Electrical Engineering Urmia UniversityUrmiaIran Department of Electrical Engineering Pardis BranchIslamic Azad UniversityPardisIran

This paper presents a risk-based competitive bi-level framework for optimal decision-making in energy sales by a distribution company(DISCO)in an active distribution network(ADN).At the upper level of this framework,the DISCO and a rival retailer compete for selling *** DISCO intends to maximize its profit in the competitive ***,it is very important for the DISCO to make a decision and offer an optimal price for attracting customers and winning the *** microgrids(MGs)at the lower level,as the costumers,intend to purchase energy from less expensive sources in order to minimize *** is a bi-level framework with two different *** genetic algorithm is used to solve this *** DISCO needs to be cautious,so it uses the conditional value at risk(CVaR)to reduce the risk and increase the probability of making the desired *** effect of this index on the trade between the two levels is *** simulation results show that the proposed method can reduce the cost of MGs as the costumers,and can enable the DISCO as the seller to win the competition with its rivals.

关键词： Microgrid networked operation bi-level framework risk active distribution networks

The Bedbug Meta-heuristic Algorithm to Solve Optimization Problems

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Journal of Bionic Engineering 2023年第5期20卷 2465-2485页

作者： Kouroush Rezvani ali Gaffari Mohammad reza Ebrahimi Dishabi Department of Computer Engineering Miyaneh BranchIslamic Azad UniversityMiyanehIran Department of Computer Engineering Tabriz BranchIslamic Azad UniversityTabrizIran

Small parasitic Hemipteran insects known as bedbugs(Cimicidae)feed on warm-blooded mammal’s *** most famous member of this family is the Cimex lectularius or common *** current paper proposes a novel swarm intelligence optimization algorithm called the Bedbug Meta-Heuristic Algorithm(BMHA).The primary inspiration for the bedbug algorithm comes from the static and dynamic swarming behaviors of bedbugs in *** two main stages of optimization algorithms,exploration,and exploitation,are designed by modeling bedbug social interaction to search for *** proposed algorithm is benchmarked qualitatively and quantitatively using many test functions including *** results of evaluating BMHA prove that this algorithm can improve the initial random population for a given optimization problem to converge towards global optimization and provide highly competitive results compared to other well-known optimization *** results also prove the new algorithm's performance in solving real optimization problems in unknown search *** achieve this,the proposed algorithm has been used to select the features of fake news in a semi-supervised manner,the results of which show the good performance of the proposed algorithm in solving problems.

关键词： Bedbug Meta-Heuristic Algorithm Optimization algorithm BMHA

Operation and Flexibility Contribution of Natural Gas Tanks in Multi-carrier Energy Systems

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CSEE Journal of Power and Energy Systems 2021年第3期7卷 622-631页

作者： alireza Hamedi ali reza Seifi Dariush Keihan Asl School of Electrical and Computer Engineering Shiraz UniversityShirazIran

Energy storage systems(ESSs)have an assistive role in the operation of multi-carrier energy *** paper presents a type of natural gas(NG)ESS called NG tank and studies the operation and flexibility contributions of this ESS in the *** tank modeling and formulation are unified the same as the electrical *** NG tank and the electrical ESS models are implemented on a large-scale multi-carrier energy network and the impressive effects of utilizing these units are investigated in the operational planning of the energy *** optimal operational problem is solved utilizing the teaching learning based optimization(TLBO)algorithm to minimize the operational cost of the system.

关键词： Electrical ESS multi-carrier energy system NG tank optimal operation

Selective nitration of phenols using bismuth subnitrate/charcoal in the presence of trichloroisocyanuric acid under aprotic conditions

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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