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Implementation of artificial intelligence techniques in microgrid control environment:Current progress and future scopes

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能源与人工智能(英文) 2022年第2期8卷 213-231页

作者： Rohit Trivedi Shafi khadem International Energy Research Centre Tyndall National InstituteUCCCorkIreland

Microgrids are gaining popularity by facilitating distributed energy resources(DERs)and forming essential consumer/prosumer centric integrated energy ***,coordination and control of multiple DERs and managing the energy transition in this environment is a strenuous *** control techniques are not enough to support dynamic microgrid *** of Artificial Intelligence(AI)techniques seems to be a promising solution to enhance the control and operation of microgrids in future smart grid ***,this paper briefly reviews the control architectures,existing conventional controlling techniques,their drawbacks,the need for intelligent controllers and then extensively reviews the possibility of AI implementation in different control structures with a special focus on the hierarchical control *** paper also investigates the AI-based control strategies in networked/interconnected/multi-microgrids *** concludes with the summary and future scopes of AI implementation in hierarchical control layers and structures including single and networked microgrids environments.

关键词： Artificial intelligence Microgrid control architectures Hierarchical control Networked microgrids Machine learning Distributed energy resources

Short-term effects of maize residue biochar on kinetic and thermodynamic parameters of soil β-glucosidase

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Biochar 2019年第2期1卷 213-227页

作者： Fayez Raiesi Allahyar khadem Department of Soil Science and Engineering Faculty of AgricultureShahrekord UniversityP.O.Box 115ShahrekordIran

Soil β-glucosidase (BG), the rate-limiting enzyme in the final step of cellulose hydrolysis, plays a key role in microbial metabolism, carbon (C) cycling and sequestration in terrestrial ecosystems. Biochar application is known to affect soil BG activity;however, most of the biochar studies have focused on the potential activity of BG, and it is not clear how biochar influences the kinetic and thermodynamic behavior of BG in the soil. The objective of this study was to investigate the effect of maize residue biochar on soil BG kinetic and thermodynamic parameters. Soil BG kinetic (V_(max) and K_(m)) and ther-modynamic (E_(a), ΔH_(a) and Q_(10)) parameters were determined within soils (clayey and sandy loam soils) amended with either maize residue (as positive control) or its biochar (600℃) at 0.5 and 1.0% ratios (w/w), and the mixtures were incubated for 90 days. BG showed an increase in potential enzymatic activity (81%), enzyme concentration (higher V_(max) value) (25%) and substrate affinity (lower K_(m) value) (32%) in the biochar-amended sandy loam soil only at high addition rates compared with the control, and an increase by about 86% of the catalytic efficiency (V_(max)/K_(m)). In the clayey soil, biochar addition decreased potential BG activity (by 10-29%), increased the V_(max) value (by 20-25%) and had no impact on enzyme-substrate binding affinity, but still increased the catalytic efficiency by 47-72%. Adsorption of soil BG by biochar particles did not affect the catalytic efficiency in the soil. Generally, application of maize residue biochar to the soil decreased the E_(a), ΔH_(a) and Q_(10) values of BG compared with the negative controls at both biochar rates in the light-textured soil and only at low biochar rate in heavy-textured soil. The direction and magnitude of BG responses (activity, kinetics, and thermodynamics) to biochar were more related to the soil characteristics. Biochar would increase soil BG thermal stability and decrease its sensiti

关键词： Biochar β-Glucosidase behavior Thermal sensitivity Enzyme adsorption Soil texture C cycle

Protective Effects of Vitamin E on Diabetes-induced Oxidative Stress Status and Homocysteine in the Rat Heart

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Journal of Pharmacy and Pharmacology 2017年第10期5卷 708-716页

作者： Mojtaba Beyramzadeh Mohammad Hassan khadem ansari Kaveh Azimzadeh Siamak Salami Faculty of Medicine Hacettepe University Ankara 06100 Turkey Faculty of Medicine Urmia University of Medical Sciences Urmia *** Iran Veterinary Faculty Urmia Branch Islamic Azad University Urmia *** Iran Faculty of Medicine Shahid Beheshti Medical University Tehran *** Iran

Objective： We aimed to investigate protective effects ofvit E on oxidative stress status and homocysteine （Hey） in cardiac tissue of diabetic rats. Methods： Sixteen Wistar male rats were treated with STZ （streptozotocin）（60 mg/kg） to induce diabetes. Diabetic rats were divided into two groups： NTD （non-treated diabetic） and VETD （vit E-treated diabetic） rats. The VETD group received 300 mg/kg vit E with daily feeding. Eight normal rats of the same age were used as the control group. After 6 weeks, the rats were anesthetized, their cardiac tissue was removed, and homogenated supernatant was separated. Samples were assayed for TAC （total antioxidant capacity）, LPO （lipid peroxidation）, nitrite （NO2）, nitrate （NO3）, and Hcy. Key Findings： The contents of LPO, NO3 and Hcy in NTD compared to control group indicate a significant increase, but the levels of these parameters decreased in VETD （p 〈 0.05）. There was a significant decrease in the amount of TAC in the NTD group but in VETD group, that significantly increased （p 〈 0.05）. The amount of NO2 in NTD and VETD groups, compared to the control group, did not show any significant changes （p 〉 0.05）. Conclusions： Significant decrease of oxidative stress and Hey in the cardiac tissue caused by vit E supplementation strongly indicated that this radical scavenger may promote a protective effect on diabetic cardiomyopathy through the attenuation of oxidative stress and increase antioxidant defense mechanism.

关键词： Vitamin E oxidative stress homocysteine diabetic rats.

The effects of biochar on soil nutrients status,microbial activity and carbon sequestration potential in two calcareous soils

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Biochar 2021年第1期3卷 105-116页

作者： Allahyar khadem Fayez Raiesi Hossein Besharati Mohammad Ali Khalaj Department of Soil Science and Engineering Faculty of AgricultureShahrekord UniversityP.O.Box 115ShahrekordIran Agricultural Research Education and Extension Organization(AREEO)Soil and Water Research InstituteKarajIran Ornamental Plant Research Center(OPRC) Horticultural Science Research Institute(HSRI)Agricultural ResearchEducation and Extension Organization(AREEO)MahallatIran

Biochar as an organic amendment improves soil attributes,with a potentially significant effect on soil chemical fertility and *** main objective of this study was to quantify the effect of biochar addition on nutrients,carbon sequestra-tion and microbial activity and understand the mechanisms of controlling biochar effects in calcareous *** residue biochars produced at 200,400 and 600℃ were added at 5 and 10 g kg^(−1)rates to sandy loam and clayey texture calcareous *** soil properties measured were pH and electrical conductivity(EC),plant-available potassium(K)and available phosphorus(P),total nitrogen(TN),C sequestration;and the fluorescein diacetate(FDA)hydrolysis *** of raw material and biochars increased pH(0.15-0.46 units),EC(0.14-0.38 dS m^(−1)),TN(63-120%),K(12-41%)and FDA activity(27-280%),but tended to decrease plant-available P(23-86%).Increasing pyrolysis temperature increased soil C pool index(CPI),but decreased the FDA and the changes depended largely upon the application rate and soil *** positive effects of biochar addition and its pyrolysis temperature on soil C sequestration potential were more pronounced at high than low application rate and in sandy loam than clayey ***,the effect of biochar addition and pyrolysis temperature on the FDA activity was higher at high than low application rates,but lower in sandy loam than clayey *** biochar application may successfully improve soil processes and attributes and have a high potential for C seques-tration,its effects are controlled by soil texture,pyrolysis temperature and application rate.

关键词： Biochar amendment Chemical composition Soil fertility Microbial functions Arid soils

Bearing capacity and settlement of strip footing on geosynthetic reinforced clayey slopes

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Journal of Central South University 2012年第4期19卷 1116-1124页

作者： S.A.Naeini B.khadem Rabe E.Mahmoodi Department of Civil Engineering Imam Khomeini International UniversityQazvin 16818-34149Iran

The effect of geosynthetic reinforcing on bearing capacity of a strip footing resting on georeinforced clayey slopes was *** results of a series of numerical study using finite element analyses on strip footing upon both reinforced and unreinforced clayey slopes were *** objectives of this work are to:1) determine the influence of reinforcement on the bearing-capacity of the strip footings adjacent slopes,2) suggest an optimum number of reinforcement and 3) survey the effect of friction angle in clayey soils reinforced by *** investigations were carried out by varying the edge distance of the footing from *** different numbers of geosynthetic layers were applied to obtaining the maximum bearing capacity and minimum *** achieve the third objective,two different friction angles were *** results show that the load?settlement behavior and ultimate bearing capacity of footing can be considerably improved by the inclusion of reinforcing *** using more than one layer reinforcement,the ultimate bearing capacity does not change *** is also shown that for both reinforced and unreinforced slopes,the bearing capacity increases with an increase in edge *** addition,as the soil friction angle is increased,the efficiency of reinforcing reduces.

关键词： geosynthetic reinforcing numerical analysis bearing capacity strip footing clayey slope friction angle

Tribology of multilayer coatings for wear reduction: A review

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Friction 2017年第3期5卷 248-262页

作者： Mahdi khadem Oleksiy V.PENKOV Hee-Kyung YANG Dae-Eun KIM Department of Mechanical Engineering Yonsei University Seoul 03722 Republic of KoreaCenter for Nano-Wear Yonsei University Seoul 03722 Republic of Korea Center for Nano-Wear Yonsei University Seoul 03722 Republic of Korea Department of Mechanical Engineering Yonsei University Seoul 03722 Republic of Korea

Friction and wear phenomena encountered in mechanical systems with moving components are directly related to efficiency,reliability and life of the ***,minimizing and controlling these phenomena to achieve the desired system performance is *** the numerous strategies developed for reducing friction and wear,coatings have been successfully utilized in various engineering applications to mitigate tribological *** of the benefits of coatings is that they may be fabricated using a variety of materials in several different forms and structures to satisfy the requirements of the operating *** many types,coatings that are comprised of a combination of materials in the form of a multilayer have been gaining much interest due to the added degree of freedom in tailoring the coating *** this paper,the properties and development status of multilayer coating systems for tribological applications were reviewed with the aim to gain a better understanding regarding their advantages and ***,focus was given to Ti-based and Cr-based coatings since Ti and Cr were identified as important elements in multilayer coating *** was given to materials,design concepts,mechanical properties,deposition method,and friction and wear characteristics of these types of coatings.

关键词： multilayer coating friction wear tribology

SP-DSTS-MIMO Scheme-Aided H.266 for Reliable High Data Rate Mobile Video Communication

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Computers, Materials & Continua 2023年第1期74卷 995-1010页

作者： khadem Ullah Nasru Minallah Durre Nayab Ishtiaque Ahmed Jaroslav Frnda Jan Nedoma Department of Computer Systems Engineering University of Engineering and Technology PeshawarPeshawar25000Pakistan National Centre in Big Data and Cloud Computing University of Engineering and Technology Peshawar(NCBC-UETP)Peshawar25000Pakistan Department of Quantitative Methods and Economic Informatics Faculty of Operation and Economics of Transport and CommunicationsUniversity of Zilina01026ZilinaSlovakia Department of Telecommunications Faculty of Electrical Engineering and Computer ScienceVSB-Technical University of OstravaOstrava-PorubaCzech Republic

With the ever growth of Internet users,video applications,and massive data traffic across the network,there is a higher need for reliable bandwidth-efficient multimedia *** Video Coding(VVC/H.266)is finalized in September 2020 providing significantly greater compression efficiency compared to Highest Efficient Video Coding(HEVC)while providing versatile effective use for Ultra-High Definition(HD)*** article analyzes the quality performance of convolutional codes,turbo codes and self-concatenated convolutional(SCC)codes based on performance metrics for reliable future video *** advent of turbo codes was a significant achievement ever in the era of wireless communication approaching nearly the Shannon *** codes are operated by the deployment of an interleaver between two Recursive Systematic Convolutional(RSC)encoders in a parallel *** RSC encoders may be operating on the same or different architectures and code *** proposed work utilizes the latest source compression standards H.266 and H.265 encoded standards and Sphere Packing modulation aided differential Space Time Spreading(SP-DSTS)for video transmission in order to provide bandwidth-efficient wireless video ***,simulation results show that turbo codes defeat convolutional codes with an averaged E_(b)/N_(0) gain of 1.5 dB while convolutional codes outperformcompared to SCC codes with an E_(b)/N_(0) gain of 3.5 dBatBit ErrorRate(BER)of 10−*** Peak Signal to Noise Ratio(PSNR)results of convolutional codes with the latest source coding standard of H.266 is plotted against convolutional codes with H.265 and it was concluded H.266 outperform with about 6 dB PSNR gain at E_(b)/N_(0) value of 4.5 dB.

关键词： H.265 RSC turbo codes SCC SP-DSTS BP-CNN BER PSNR

Performance evaluation of a novel rotational damper for structural reinforcement steel frames subjected to lateral excitations

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Earthquake Engineering and Engineering Vibration 2014年第1期13卷 75-84页

作者： M.Sanati S.E.khadem S.Mirzabagheri H.Sanati M.Y.Khosravieh Faculty of Mechanical Engineering Tarbiat Modares University Structural Engineering Group Faculty of Civil and Environmental EngineeringTarbiat Modares University School of Mechanical Engineering College of engineeringUniversity of Tehran

In this study,a novel rotational damper called a Rotational Friction Viscoelastic Damper(RFVD) is *** viscoelastic pads are added to the Rotational Friction Damper(RFD) in addition to the friction discs used in this conventional ***,the amount of energy dissipated by the damper increases in low excitation *** fact,the input energy to the structure is simultaneously dissipated in the form of friction and heat by frictional discs and viscoelastic *** order to compare the performance of this novel damper with the earlier types,a set of experiments were carried *** to the test results,the RFVD showed a better performance in dissipating input energy to the structure when compared to the *** seismic behavior of steel frames equipped with these dampers was also numerically evaluated based on a nonlinear time history *** numerical results verifi ed the performance of the dampers in increasing the energy dissipation and decreasing the energy input to the structural *** order to achieve the maximum dissipated energy,the dampers need to be installed in certain places called critical points in the *** appropriate approach is presented to properly fi nd these ***,the performance of the RFVDs installed at these critical points was investigated in comparison to some other confi gurations and the validity of the suggested method in increasing the energy dissipation was confi rmed.

关键词： seismic excitations rotational friction-viscoelastic damper rotational damper friction pad viscoelastic material energy dissipation

Influence of work zone signage on driver speeding behavior

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Journal of Modern Transportation 2019年第1期27卷 52-60页

作者： Snehanshu Banerjee Mansoureh Jeihani Nashid K.khadem Department of Transportation and Urban Infrastructure Studies Morgan State University

Speeding in a work zone needs to be tackled effectively to enhance work zone safety. This study evaluates the influence of three different work zone signs—speed photo enforced signs, dynamic speed display signs and reduced speed limit signs—on driver speeding behavior using a medium-fidelity driving simulator. The speed photo enforced and reduced speed limit signs were placed at intervals before the start of the work zone and in the work zone. A virtual work zone network was built to replicate the Baltimore–Washington Parkway(MD-295). A total of 66 participants from different socioeconomic backgrounds participated in 264 driving simulation sessions. The speeds were measured over four phases: initial speed area, sign visible area, sign readable area and post sign area. An analysis of variance and post hoc analysis showed that the speed photo enforced sign was the most effective of the three signs. The second speed photo enforced sign within the work zone was more effective at reducing speed than the sign before the start of the work zone, especially in the post sign area. It was observed that female participants tend to slow down more when encountering a speed photo enforcement sign.

关键词： Work zone Driving simulator Speed study Speed photo enforced sign Dynamic speed display sign Reduced speed limit sign