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Hybrid Optimized PI controller Design for Grid Tied PV Based Electric Vehicle

Intelligent Automation & Soft computing 2023年第5期36卷 1523-1545页

作者： j.Aran Glenn Srinivasan Alavandar Department of Electrical and Electronics Engineering AMET Deemed to be UniversityChennaiTamil NaduIndia Department of Electrical and Electronics Engineering Agni College of TechnologyChennaiTamil NaduIndia

Nowadays,researchers are becoming increasingly concerned about developing a highly efﬁcient emission free transportation and energy generation system for addressing the pressing issue of environmental crisis in the form of pollution and climate *** introduction of Electric Vehicles(EVs)solves the challenge of emission-free transportation while the necessity for decarbonized energy production is fulﬁlled by the installation and expansion of solar-powered Photovoltaic(PV)***,this paper focuses on designing an effective PV based EV charging system that aids in stepping towards the achievement of a pollution free *** overcoming the inherent intermittency associated with PV,a novel Dc-Dc converter is designed by integrating both Trans Z-source con-verter and Luo converter,which offers remarkable beneﬁts of high conversion range,lesser voltage stress and excellent efﬁciency.A novel robust Lion Grey Wolf Optimized Proportional Integral(LGWO-PI)controller is designed for sig-niﬁcantly strengthening the operation of the integrated converter in terms of peak overshoot,Total Harmonic Distortion(THD)and settling time.A 3’Voltage Source Inverter(VSI)is employed to convert the stable Dc output from the PV sys-tem to Ac,which is then used for driving the Brushless Direct current Motor(BLDc)motor of *** speed of the BLDc is regulated using a PI *** BLDc motor gets the power supply from the grid during the unavailability of PV based power *** grid is integrated with the designed EV charging system through a 1’VSI and the process of grid voltage synchronization is carried out with the application of PI *** simulation for evaluating the operation of the presented EV charging system is done using MATLAB and the attained out-comes have validated that this introduced methodology delivers enhanced perfor-mance with optimal efﬁciency of 97.6%and lesser THD of 2.1%.

关键词： PV system trans Z-source based luo converter LGWO-PI controller BLDc motor PI controller single phase VSI three phase VSI

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Trace Elements Distribution in Red Soils under Semiarid Mediterranean Environment

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International journal of Geosciences 2011年第2期2卷 84-97页

作者： j. A. Amorós Ortiz-Villajos F. j. García Navarro c. j. Sánchez jiménez c. Pérez de los Reyes R. García Moreno R. jiménez Ballesta Escuela Universitaria Ingeniería Técnica Agrícola Instituto Tecnología Química y Medioambiental

This study states the potential trace elements (TE’s) content of red soils located at the centre region of Spain, characterized by low rainfall and slight acidity over prolonged weathering periods. For this purpose, three soil profiles from a catena were described, sampled and analyzed. The most notable characteristics are the low organic matter content and the predominantly acidic pH. Illite and kaolinite are the predominant clay minerals. The fertility of the soils is sufficient to provide most of the nutrients required, with very suitable potassium levels. The geochemical characters of this soil are: only few elements remain almost invariable across the profiles and over time, however the majority of them were directly linked with the clay content. These soils are characterized by relatively low levels of some trace elements such as Sr (64.35 mg?kg–1), Ba (303.67 mg?kg–1) and Sc (13.14 mg?kg–1);high levels of other trace elements such as V (103.92 mg?kg–1), cr (79.9 mg?kg–1), cu (15.18 mg?kg–1), Hf (10.26 mg?kg–1), Ni (38 mg?kg–1) and Zr (337 mg?kg–1);while the levels for rare earth elements (REE’s) such as La (48.36 mg?kg–1), ce (95.07 mg?kg–1), Th (13.33 mg?kg–1) and Nd (42.65 mg?kg–1) are significantly high. The distribution of mayor and trace elements was directly re- lated to weathering processes, parent material and anthropogenic activities.

关键词： Trace Elements castilla-La Mancha Region Red Soils Soil Geochemistry

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A Fast Accurate Boundary IntegralMethod for Potentials on closely Packed cells

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communications in computational Physics 2013年第9期14卷 1073-1093页

作者： Wenjun Ying j.Thomas Beale Shanghai jiao Tong University Department of Mathematics and Institute of Natural SciencesMinhangShanghai 200240P.R.China Duke University Department of MathematicsDurhamNC 27708-0320USA

Boundary integral methods are naturally suited for the computation of harmonic functions on a region having inclusions or cells with different material ***,accuracy deteriorates when the cell boundaries are close to each *** present a boundary integralmethod in two dimensions which is specially designed tomaintain second order accuracy even if boundaries are arbitrarily *** uses a regularization of the integral kernel which admits analytically determined corrections to maintain *** boundaries with many components we use the fast multipolemethod for efficient *** compute electric potentials on a domain with cells whose conductivity differs from that of the surrounding *** first solve an integral equation for a source term on the cell interfaces and then find values of the potential near the interfaces via *** we use a Poisson solver to extend the potential to a regular grid covering the entire region.A number of examples are *** demonstrate that increased refinement is not needed to maintain accuracy as interfaces become very close.

关键词： Laplace equation boundary integral method fast multipole method

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The Quaternary fault in jiamu area,the Xinjiang Uygur Autonomous Region

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chinese Science Bulletin 2002年第6期47卷 494-499页

作者： A.Hubert-Feram j.Suppe Department of Geosciences Princeton UniversityPrincetonDepartment of GeosciencesPrinceton UniversityPrinceton New Jersey 08544USANew Jersey 08544USA

The Quaternary Tailan River fault has been found in the Tianshan foothills area, the Xinjiang Uygur Autonomous Region. It is the recent boundary fault of the Tarim Basin coupling with the West Tianshan Mountains. In the light of measurement data of the slip which cuts the Quaternary deposits of different ages, the Quaternary kinematic figures of the Tailan River fault are estimated as follows: crustal shortening 3.7 km and shortening rate 1.59 mm/a, uplift of Tianshan Mountains 1.34 km and uplift rate 0.56 mm/a, and additional relief of 900 m. considering the contribution of the Gumubiezi anticline close to the south of the Tailan River fault, the Quaternary crustal shortening and shortening rate of the jiamu area are 4.8 km and 2 mm/a respectively. The above-mentioned data coincide with the crustal shortening rate calculated from the growth strata in the Kuqa area, as well as the GPS measurements in the Lake Issyk area and the Korla-Urumqi area, reflecting the fast thrusting period within the

关键词： coupling mechanics in the formation of basin and moun-tains of the Tarim basin-Tianshan Mountains moraine Quaternary fault crustal shortening.

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Selected elements of rock burst state assessment in case studies from the Silesian hard coal mines

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Mining Science and Technology 2009年第5期19卷 660-667页

作者： KABIESZ józef MAKóWKA janusz central Mining Institute

Exploitation of coal seams in the Upper Silesian coal Basin is conducted in complex and difficult conditions. These difficulties are connected with the occurrence of many natural mining hazards and limitations resulting from the existing in this area surface infrastructure. One of the most important problems of Polish mining is the rock burst hazard and reliable evaluation of its condition. During long-years’ mining practice in Poland a comprehensive system of evaluation and control of this hazard was developed. In the paper the main aspects of rock burst hazard state evaluation will be presented, comprising: 1) rock mass inclination for rock bursts, i.e., rock strength properties investigation, comprehensive parametric evaluation of rock mass inclination for rock bursts, prognosis of seismic events induced by mining operations, methods of computer-aided modelling of stress and rock mass deformation parameters distribution, strategic rock mass classification under rock burst degrees; 2) immediate seismic and rock burst hazard state evaluation, i.e., low diameter test drilling method, seismologic and seismoacoustic method, comprehensive method of rock burst hazard state evaluation, non-standard methods of evaluation; 3) legal aspects of rock burst hazard state evaluation. Selected elements of the hazard state evaluation system are illustrated with specific practical examples of their application.

关键词： coal mine rock bursts control case studies

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comparative study of well soaking timing(pre *** flowback)for water blockage removal from matrix-fracture interface

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Petroleum 2020年第3期6卷 286-292页

作者： Nur Wijaya james j.Sheng Bob L.Herd Department of Petroleum Engineering Texas Tech UniversityTexasUSA

Water blockage after hydraulic fracturing is one of the major challenges in shale oil recovery which affects the optimal production from the *** water blockage represents a higher water saturation near the matrixfracture interface,which decreases the hydrocarbon relative *** removal of water blockage in the field is typically carried out by soaking the well(i.e.,shut-in)after hydraulic fracturing operation is *** soaking period allows water redistribution,which decreases the water saturation near the matrix-fracture ***,previous field reports show that there is not a strong consensus on whether shut-in is beneficial in terms of production rate or ultimate oil *** to the large number of parameters involved in hydraulic fracturing and tight formations,it is challenging to select which parameter plays the dominant role in determining the shut-in ***,literature on field case studies does not frequently report the parameters which are of researchers’*** other words,the challenge of evaluating shut-in performance not only lies on the complexity of parameters and effects involved within the reservoir,but also the limited number of field case studies which report a comprehensive list of fracturing and reservoir *** paper aims to investigate the effect of well soaking timing on shut-in *** idea to investigate the shut-in timing effect is motivated by the fact that in the field,shut-in can take place either immediately after hydraulic fracturing but before the first flowback(i.e.,pre-flowback)or sometime after the first flowback(i.e.,post-flowback).The timing of shut-in is believed to influence the production performance,because it dictates how much water is allowed to imbibe from the fractures to the matrix before the extended production.A numerical model is built and validated by a successful history match with numerous data from core-flood *** previous s

关键词： Water blockage Formation damage Flowback Shut-in Desiccation

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Protecting Against Address Space Layout Randomisation (ASLR) compromises and Return-to-Libc Attacks Using Network Intrusion Detection Systems

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International journal of Automation and computing 2011年第4期8卷 472-483页

作者： David j Day Zheng-Xu Zhao School of computing and Mathematics University of Derby Derby UK Faculty of Information Science and Technology Shijiazhuang Tiedao University Shijiazhuang PRC

Writable XOR executable （W⊕X） and address space layout randomisation （ASLR） have elevated the understanding necessary to perpetrate buffer overflow exploits [1] . However, they have not proved to be a panacea [1 3] , and so other mechanisms, such as stack guards and prelinking, have been introduced. In this paper, we show that host-based protection still does not offer a complete solution. To demonstrate the protection inadequacies, we perform an over the network brute force return-to-libc attack against a preforking concurrent server to gain remote access to a shell. The attack defeats host protection including W⊕X and ASLR. We then demonstrate that deploying a network intrusion detection systems （NIDS） with appropriate signatures can detect this attack efficiently.

关键词： Buffer overflow stack overflow intrusion detection systems (IDS) signature rules return-to-libc attack pre-forking.

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Using Twitter Bios to Measure changes in Self-Identity:Are Americans Defining Themselves More Politically Over Time?

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journal of Social computing 2021年第1期2卷 1-13页

作者： Nick Rogers jason j.jones Department of Sociology Stony Brook UniversityStony BrookNY 11794USA

Are Americans weaving their political views more tightly into the fabric of their self-identity over time?If so,then we might expect partisan disagreements to continue becoming more emotional,tribal,and *** recent scholarship has speculated that this politicization of Americans’identity is occurring,but there has been little compelling attempt to quantify the phenomenon,largely because the concept of identity is notoriously difficult to *** introduce here a methodology,Longitudinal Online Profile Sampling(LOPS),which affords quantifiable insights into the way individuals amend their identity over *** this method,we analyze millions of“bios”on the microblogging site Twitter over a 4-year span,and conclude that the average American user is increasingly integrating politics into their social *** on the site are adding political words to their bios at a higher rate than any other category of words we measured,and are now more likely to describe themselves by their political affiliation than their religious *** data suggest that this is due to both cohort and individual-level effects.

关键词： identity social identity theory social media ideology political polarization Twitter

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Toward an ScA-OSGi based Middleware for Radio Frequency Identification Applications

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journal of Shanghai jiaotong university(Science) 2010年第2期15卷 199-206页

作者：吴捷王东盛焕烨 j. Siror Department of computer Science and Engineering Shanghai Jiaotong University

The radio frequency identification (RFID) technology progressing is becoming a increasing interest in several application areas. To accommodate diverse and changing requirements from applications,RFID middleware should be reconfigurable. However,current RFID middleware is limited in its ability to support reconfiguration. To solve this problem,we adopt the service-oriented component-based approach in building the middleware. component-based design enables decomposition of middleware functionality and is easier than the current one to manage and modify the structure of the middleware both statically and dynamically. Applying service-oriented architecture (SOA) can further reduce the coupling between components and external software and ease the integration between middleware and applications. We propose a two-layered service component architecture (ScA) open service gateway initiative (OSGi) component model so as to enable reconfigurability. Based on the proposed component model,we build a standard-based RFID middleware-ScA-OSGi based RFID middleware (SORM) which supports flexible deployment topologies and reconfigurability. The design and implementation details of SORM are illustrated.

关键词： radio frequency identification (RFID) middleware service component architecture (ScA) open service gateway initiative (OSGi)

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Secrecy sum-rate analysis of massive MIMO systems under dual-threat attacks using normalization methods

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Digital communications and Networks 2019年第4期5卷 237-244页

作者： Kishan Neupane Rami j.Haddad Dept.of Electrical and computer Eng.Georgia Southern UniversityStatesboroGA30460USA

Massive Multiple Input Multiple Output(MIMO)has been considered as an emerging technology to enhance the spectral and energy efficiency for the upcoming wireless communication *** paper derives a closedform approximation for the Ergodic Achievable Secrecy Sum-Rate(EASSR)by considering the joint impact of eavesdroppers and *** widely used linear precoding techniques,Zero-Forcing(ZF)and Maximum Ratio Transmission(MRT),were used in conjunction with matrix and vector normalization to analyze the secrecy ***-form expressions are used to explain how the secrecy performance is affected when using the ZF and MRT precoding in the eavesdropping and jamming attack *** also analyze and compare the performances of different combinations of normalization method and precoding technique in various *** the analytical expressions and simulation results,we observe that the vector and matrix normalization perform better for the ZF precoding than for the MRT precoding in high Signal-to-Noise Ratio(SNR)***,in low SNR,the MRT with matrix normalization outperforms the ZF with vector normalization regardless of the number of users in the ***,we observe that the MRT fails to serve more than two users in high SNR *** results obtained from Monte carlo simulation are used to corroborate the accuracy of the asymptotic secrecy analysis.

关键词： Massive MIMO Linear precoding Normalization methods Secrecy analysis

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