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Chinese Journal of Chemical Physics 2010年第2期23卷 165-168,I0001页

作者： farid Moeinpour 伊斯兰阿扎德大学理学院化学系阿巴斯港***伊朗

The mechanism and regioselectivity of 1,3-dipolar cycloaddition of N-[methyl]-C-[5-nitro-2-furyl] nitrilimine with dimethyl 7-oxabicyclo[2,2,1]hepta-2,5-diene-2,3-dicarboxylate were investigated using activation energy calculations and density functional theory-based reactivity indexes. The reaction proceeds by an asynchronous concerted mechanism. The calculations are performed at the B3LYP/6-31G（d） level of theory and the obtained results are in agreement with experimental outcome.

关键词： Regioselectivity 1 3-dipolar cycloaddition Nitrilimine DFT-based reactivity index B3LYP calculation

Stainless steel binder for the development of novel TiC-reinforced steel cermets

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Journal of University of Science and Technology Beijing 2006年第6期13卷 546-550页

作者： Akhtar farid Materials Science and Engineering School University of Science and Technology BeijingBeijing 100083 China

Steel reinforced TiC composites are an attractive choice for wear resistance and corrosion resistance applications. TiC- reinforced 17-4PH maraging stainless matrix composites were processed by conventional powder metallurgy （P/M）. TiC-reinforced maraging stainless steel composites with 〉97% of theoretical density were fabricated. The microstructure, mechanical and wear properties of the composites were evaluated. The microstructure of these composites consisted of spherical and semi-spherical TiC particles. A few microcracks appeared in the composites, showing the presence of tensile stress in the composites produced during sintering. Typical properties, namely, hardness and bend strength were reported for the sintered composites. After heat treatment and aging, the increase of hardness was observed. The increase of hardness was attributed to the aging reaction in the 17-4PH stainless steel. The precipitates appeared in the microstructure and were responsible for the increase in hardness. The specific wear behavior of the composites was strongly dependent on the content of TiC particles, the interparticle spacing, and the presence of hard precipitates in the binder phase.

关键词： TiC-based cermets binder phase maraging stainless steel aging microcracks

Decentralized Voltage Control of Power Systems Using Multi-agent Systems

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Journal of Modern Power Systems and Clean Energy 2020年第2期8卷 249-259页

作者： Hamidreza shahbazi farid Karbalaei the Department of Electrical Engineering Shahid Rajaee Teacher Training UniversityTehranIran the Faculty of Electrical Engineering Shahid Rajaee Teacher Training UniversityTehranIran

*** our proposed smart self-healing method,two types of control agents are defined,namely master and local,which are applied in two *** the first step,the power system returns to the normal state after fault *** after a fault detection in a power system,the system is divided into three subsystems using spectral graph *** is conducted based on reactive power flow in transmission *** each subsystem,a local control agent and a performance index(PI)are *** the PI of a subsystem exceeds its threshold limit,the local control agent uses the Sugeno fuzzy system to intelligently select and apply control *** the second step as performed by the master control agent,the power system is transformed to an optimal state by solving the optimization *** on a 39-bus New England reveal the effective performance of the proposed method.

关键词： Emergency voltage control partitioning multi-agent systems fuzzy systems

Effect of Additive Cu-10Sn Alloy on Sintering Behavior of Elemental Powders in Composition of 465 Stainless Steel

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Journal of Iron and Steel Research International 2007年第4期14卷 61-64,74页

作者： farid Akhtar Department of Metallurgical and Materials Engineering University of Engineering and TechnologyLahore 54890PakistanInstitute of Powder MetallurgyUniversity of Science and Technology BeijingBeijing 100083China

The addition of Cu-10Sn alloy for developing the high strength 465 maraging stainless steel from elemental powders was studied. The sintering parameters investigated include the sintering temperature, the sintering time, and the mass percent of Cu-10Sn. For vacuum sintering, effective sintering occurs at temperature between 1 250 ℃ and 1 300 ℃. The maximum sintered density was achieved at 1 300 ℃ for 60 min with 3% （in mass percent） Cu- 10Sn alloy. More than 3% （in mass percent） Cu-10Sn content and temperature above 1 300 ℃ caused slumping of the samples. A maximum density of 7.4 g/cm^3 was achieved with 3% （in mass percent） Cu-10Sn content at a sintering temperature of 1 300 ＂C for 60 rain. A maximum ultimate tensile strength （UTS） of 517 MPa was achieved with 3% （in mass percent） Cu-10Sn content. With content higher than 2% （in mass percent） Cu-10Sn, a maximum increase in the density was observed. The fracture morphologies of the sintered samples are also reported.

关键词： 465 maraging stainless steel sintering UTS Cu-10Sn alloy

Inforence: effective fault localization based on information-theoretic analysis and statistical causal inference

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Frontiers of Computer Science 2019年第4期13卷 735-759页

作者： farid FEYZI Saeed PARSA Department of Computer Engineering Iran University of Science and Technology Tehran Iran

In this paper, a novel approach, Inforence, is proposed to isolate the suspicious codes that likely contain faults. Inforence employs a feature selection method, based on mutual information, to identify those bug-related statements that may cause the program to fail. Because the majority of a program faults may be revealed as undesired joint effect of the program statements on each other and on program termination state, unlike the state-of-the-art methods, Inforence tries to identify and select groups of interdependent statements which altogether may affect the program failure. The interdependence amongst the statements is measured according to their mutual effect on each other and on the program termination state. To provide the context of failure, the selected bug-related statements are chained to each other, considering the program static structure. Eventually, the resultant causeeffect chains are ranked according to their combined causal effect on program failure. To validate Inforence, the results of our experiments with seven sets of programs include Siemens suite, gzip, grep, sed, space, make and bash are presented. The experimental results are then compared with those provided by different fault localization techniques for the both single-fault and multi-fault programs. The experimental results prove the outperformance of the proposed method compared to the state-of-the-art techniques.

关键词： fault localization debugging backward dynamic slice mutual information feature selection

The emancipation of testosterone from niche iormone to multi-system player

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Asian Journal of Andrology 2015年第1期17卷 58-60页

作者： farid Saad Bayer Pharma Global Medical Affairs Andrology Berlin Germany Gulf Medical University School of Medicine Ajman United Arab Emirates.

It is no exaggeration to say that our lconceptualization of the （patho-） physiological functions of testosterone has undergone a revolutionary development over the last three decades. The traditional thinking was that the biological functions of testosterone were restricted mainly to the area of reproduction and male sexuality. However, scientific research has clearly demonstrated that testosterone is a multi-system hormone serving a wide range of hitherto unsuspected biological functions.

关键词： The emancipation testosterone from niche

Gastrointestinal Ulcers Treatment: Plants and Recipes Used by Herbalists of Abomey-Calavi and Cotonou Districts, Southern Benin

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American Journal of Plant Sciences 2024年第9期15卷 699-725页

作者： Brice Dangnon Durand Dah-Nouvlessounon Sêmassa Mohamed Ismaël Hoteyi Abdelmalick Abdelrahman Moubachar Abdelkerim Mahamat Nicodème Worou Chabi Sina Haziz farid Baba-Moussa Adolphe Adjanohoun Lamine Baba-Moussa Laboratory of Biology and Molecular Typing in Microbiology Department of Biochemistry and Cell Biology Faculty of Science and Technology University of Abomey-Calavi Cotonou Benin Unit of Biochemistry and Molecular Markers in Nutrition Laboratory of Research in Applied Biology Polytechnic School of Abomey-Calavi University of Abomey-Calavi Cotonou Benin Laboratoire de Microbiologie et de Technologie Alimentaire Faculty of Science and Technology University of Abomey-Calavi Cotonou Benin Institut National des Recherches Agricoles du Bnin Cotonou Benin

This study set out to identify plants and recipes used by herbalists in the municipalities of Abomey-Calavi and Cotonou to treat gastrointestinal ulcers and to characterize the distribution of their knowledge. An ethno-pharmacological survey was carried out in which informants who agreed freely were interviewed using a semi-structured questionnaire. A total of 85 herbalists were surveyed. The data were processed with Microsoft Excel to calculate the relative frequencies of citation of the various species mentioned by the herbalists and various indices including Simpson’s Index were adapted to test the distribution of their knowledge. Multiple regression and correspondence analysis were performed using R studio. Our results revealed that the Dendi, Ifè and Mina, all equitable in their knowledge of anti-ulcer plants, are likely to know more than the other ethnic groups. On the other hand, respondents practicing Islam are more likely to know many antiulcer plants than those practicing Vodoun and Christianity. This constant distribution of knowledge of anti-ulcer plants among the Dendi, Ifè and Mina, three different ethnic groups seems normal and attests to the fusion between these different ethnic groups in view of this knowledge. A total of 70 anti-ulcer recipes, made from 71 species of medicinal plants or non-floristic resources were recorded. Vitellaria paradoxa, Parkia biglobosa and Ocimum gratissimum were the top 03 most frequently cited in descending order of frequency. All the species cited are grouped into 44 botanical families among which the Fabaceae, Lamiaceae and Sapotaceae were strongly represented. Benin’s flora abounds in a diversity of medicinal plant species known to herbalists in Abomey-Calavi and Cotonou for the treatment of gastrointestinal ulcers. The results of this study constitute a good archive for the selection of plant species for in-depth studies with a view to formulating improved traditional medicines for gastrointestinal ulcers.

关键词： Gastrointestinal Ulcer Ethnomedicine Herbalist Nature Plant Material

Rheological behavior of oil sludge from Algerian refinery storage tanks

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Petroleum Research 2022年第4期7卷 536-544页

作者： farid Souas LEGHYD Laboratory Faculty of Civil EngineeringUniversity of Science and Technology Houari Boumediene(USTHB)Bab EzzouarAlgerAlgeria Research Unit Materials Processes and Environment(UR-MPE)Faculty of Engineering ScienceUniversity M’Hamed BougaraBoumerdesAlgeria

The consumption and demand for petroleum are increasing dramatically with the rapid development of industry and energy *** a result,petroleum refineries produce the greatest amount of oily sludge formed at the bottom of storage tanks during oil storage operations,which has a severely negative impact on the storage capacity and the operational safety of the storage *** present study focuses on the rheology of this complex fluid from Algerian crude oil storage *** measurements were performed at different temperatures under steady shear and dynamic oscillometry using AR-2000 *** results obtained show that the sludge exhibits yield-pseudoplastic flow behavior at low shear rates,which is adequately described by the Herschel Bulkley model based on the standard error and correlation coefficient ***,quasi-Newtonian flow behavior occurs at very high shear *** increase in temperature had positive effects on the rheological properties of the sludge,including dynamic viscosity,shear stress,yield stress,complex modulus,elastic modulus and viscous *** dynamic rheology studies have shown that the sludge material behaves more like a solid than a liquid under all experimental conditions studied.

关键词： Crude oil Rheology Sludge Storage tank Temperature Viscosity

The effects of exhaust air vent location on thermal comfort inside a residential building equipped with an evaporative cooling system

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Building Simulation 2021年第4期14卷 1063-1075页

作者： rmin Saraei Samir farid Moujaes Department of Mechanical Engineering College of EngineeringUniversity of Nevada Las VegasLas VegasNV89154USA

The location of exhaust air vents of an evaporative cooling system can have significant effects on providing thermal comfort and controlling humidity, temperature and air distribution in buildings. In the current study, four different strategies have been evaluated for exhaust air vent locations to provide the optimum thermal comfort inside a typical residential house. This study provides a numerical solution for temperature and relative humidity profiles in the residential house and within the living space in each room typically at a height of 1.8 m or less. By evaluating different exhaust air vent locations in a room, the best strategy(ies) to provide more appropriate thermal comfort condition and obtained and as a conclusion, the exhaust vents should be located on furthest wall away from the entrance of the room and in the middle. The results provided in the current study can eventually be applied in the design of evaporative cooler exhaust vent systems in residential buildings and lead to improve the performance of these systems.

关键词： thermal comfort CFD evaporative cooling system exhaust air vents

Investigation into the Regiochemistry of 1,3-Dipolar Cycloaddition of C,N-Diphenyl Nitrone with Some Vinyl Sulfoximines as Dipolarophile： Theoretical Studies

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Chinese Journal of Chemistry 2011年第7期29卷 1429-1433页

作者： Moeinpour, farid Department of Chemistry Faculty of Sciences Islamic Azad University Bandar Abbas Branch Bandar Abbas *** lran

The regiochemistry of 1,3-dipolar cycloaddition reactions of C,N-diphenyl nitrone with some vinyl sulfoximines as dipolarophile was investigated using density functional theory （DFT）-based reactivity indexes and activation energy calculations at B3LYP/6-31G（d） level of theory. Analysis of the geometries and bond orders （BOs） at the TS structures associated with the different reaction pathways shows that these 1,3-dipolar cycloaddition reac- tions occur via an asynchronous concerted mechanism. Analysis of the local electrophilicity and nucleophilicity in- dexes permits an interpretation about the regioselectivity of these 1,3-dipolar cycloaddition reactions. The theoretical results obtained in the work clearly predict the regiochemistry of the isolated cycloadducts and agree to experimental outcomes.

关键词： regioselectivity cycloaddition density functional calculations