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First-principles study of ferromagnetic metal Fe5GeTe2

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Nano Materials Science 2019年第4期1卷 299-303页

作者： Minwoong joe Unchun Yang Changgu Lee School of Mechanical Engineering Sungkyunkwan University2066Seobu-roJangan-guSuwonGyeonggi16419South Korea School of Software Chung-Ang University84Heukseok-roDongjak-guSeoul06974South Korea

For next-generation flexible spin devices,it is crucial to discover and study novel high Tc two-dimensional(2D)magnetic materials considering their atomic-level thickness and flexural mechanical ***,we investigated physical properties of a recently rediscovered ferromagnetic 2D material,Fe5GeTe2,which has near-room temperature Tc,such as stability of monolayer,and electronic and magnetic properties as well as their changes under strain using DFT *** found that monolayer formation energy of Fe5GeTe2 lies inside the energy range of other 2D materials,and thus successful synthesis of the monolayer is *** structures and density of states(DOS)calculations reveal that monolayer Fe5GeTe2 is metallic and of Stoner-type ***,we checked the strain effect on its magnetic *** ferromagnetic(FM)coupling is quite robust under biaxial strain and enhanced significantly with the increase of Fe magnetic moment from 1.65μBto 2.66μBwhile the strain increases from zero to+15%.Such a tunable magnetism of Fe5GeTe2 could provide an extra advantage for flexible magnetic device applications.

关键词： properties. ferromagnetic magnetic

Assessing Sino-Indian Economic Relations in an Interdependence Framework: 1992-2008

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Economic and Political Studies 2015年第1期3卷 129-159页

作者： joe THOMAS KARACKATTU the Department of Humanities and Social Sciences Indian Institute of Technology Madras

This study situates Sino-Indian economic interaction under the interdependence *** mapping conflict behavior in this dyad against the trends in the economic interdependence,we find a discernible shift away from escalation(high-level conflict)towards bargaining(diplomatic contestation).This paper argues that interdependence has only recently emerged in the India-China dyad and that lingering strategic distrust,national security consideration,and protectionist tendency have prevented the deepening of economic *** findings challenge the direction of interdependence in this dyad normally gleaned from nominal trade *** paper also highlights key issue-areas that inhibit strategic coupling in the bilateral economic interaction.

关键词： economic interdependence trade conflict Sino-India

A stochastic approach for integrating market and technical uncertainties in economic evaluations of petroleum development

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Petroleum Science 2009年第3期6卷 319-326页

作者： Changhyup Park joe M. Kang Taewoong Ahn BK21 Research Division for Energy Resources Seoul National University Division of Energy Systems Engineering Seoul National University

The paper presents a stochastic and economic analysis for petroleum development under uncertain market and technical environments. Mean-reversion with jumps for price forecasting is used to consider market uncertainty, while various scenarios for the reservoir properties and cost are employed to consider technical uncertainty. Monte Carlo simulation is carried out to obtain the feasible range of net present values and internal rates of return. The influence of stochastic parameters is examined through correlation coefficients. The stochastic approach yields more reliable evaluation and effectively investigates the characteristics of development. The integration of uncertainties and contractual terms results in an irregular tendency in the future cash flow and reveals that a larger reserve does not guarantee a greater profit. The reserve and the well rate affect the economic values whereas the parameters for price prediction don＇t. The research confirms the necessity of qualifying uncertainties for realistic decision-making at the initial stage of development.

关键词： Uncertainty petroleum development decision-making stochastic approach mean reversion with jumps

Kinematic and Dynamic Analysis of a 3-■US Spatial Parallel Manipulator

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Chinese Journal of Mechanical Engineering 2020年第1期33卷 114-130页

作者： Mervin joe Thomas M.L.Joy A.P.Sudheer Mechatronics/Robotics Lab Department of Mechanical EngineeringNational Institute of Technology CalicutKozhikodeIndia

Parallel Kinematic Machines(PKMs)are being widely used for precise applications to achieve complex motions and variable poses for the end effector *** are found in medical,assembly and manufacturing industries where accuracy is *** is often desired to have a compact and simple architecture for the robotic *** this paper,the kinematic and dynamic analysis of a novel 3-PRUS(P:prismatic joint,R:revolute joint,U:universal joint,S:spherical joint)parallel manipulator with a mobile platform having 6 Degree of Freedom(Do F)is *** kinematic equations for the proposed spatial parallel mechanism are formulated using the Modified Denavit-Hartenberg(DH)technique considering both active and passive *** kinematic equations are used to derive the Jacobian matrix of the mechanism to identify the singular points within the workspace.A Jacobian based sti ness analysis is done to understand the variations in sti ness for different poses of the mobile platform and further,it is used to decide trajectories for the end effector within the singularity free *** analytical model of the robot dynamics is presented using the Euler-Lagrangian approach with Lagrangian multipliers to include the system *** gravity and inertial forces of all links are considered in the mathematical *** analytical results of the dynamic model are compared with ADAMS simulation results for a pre-defined trajectory of the end effector.

关键词： Parallel manipulator Kinematic modelling Workspace analysis Euler-Lagrangian modelling Singularity analysis Stiffness analysis

Lightweight Super-Resolution Model for Complete Model Copyright Protection

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Tsinghua Science and Technology 2024年第4期29卷 1194-1205页

作者： Bingyi Xie Honghui Xu YongJoon joe Daehee Seo Zhipeng Cai Department of Computer Science Georgia State UniversityAtlantaGA 30303USA LSWare Inc. Seoul 08504Republic of Korea College of Intelligence Information Engineering Sangmyung UniversityRepublic of KoreaSeoul 03016

Deep learning based techniques are broadly used in various applications, which exhibit superior performance compared to traditional methods. One of the mainstream topics in computer vision is the image super-resolution task. In recent deep learning neural networks, the number of parameters in each convolution layer has increased along with more layers and feature maps, resulting in better image super-resolution performance. In today’s era, numerous service providers offer super-resolution services to users, providing them with remarkable convenience. However, the availability of open-source super-resolution services exposes service providers to the risk of copyright infringement, as the complete model could be vulnerable to leakage. Therefore, safeguarding the copyright of the complete model is a non-trivial concern. To tackle this issue, this paper presents a lightweight model as a substitute for the original complete model in image super-resolution. This research has identified smaller networks that can deliver impressive performance, while protecting the original model’s copyright. Finally, comprehensive experiments are conducted on multiple datasets to demonstrate the superiority of the proposed approach in generating super-resolution images even using lightweight neural networks.

关键词： lightweight adversarial learning image super-resolution copyright protection

A Novel Approach to Design Distribution Preserving Framework for Big Data

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Intelligent Automation & Soft Computing 2023年第3期35卷 2789-2803页

作者： Mini Prince P.M.joe Prathap Department of Information Technology St.Peter’s College of Engineering and TechnologyChennai600054TamilnaduIndia Department of Information Technology R.M.D Engineering CollegeChennai601206TamilnaduIndia

In several fields like financial dealing,industry,business,medicine,et cetera,Big Data(BD)has been utilized extensively,which is nothing but a collection of a huge amount of ***,it is highly complicated along with time-consuming to process a massive amount of ***,to design the Distribution Preserving Framework for BD,a novel methodology has been proposed utilizing Manhattan Distance(MD)-centered Partition Around Medoid(MD–PAM)along with Conjugate Gradient Artificial Neural Network(CG-ANN),which undergoes various steps to reduce the complications of ***,the data are processed in the pre-processing phase by mitigating the data repetition utilizing the map-reduce function;subsequently,the missing data are handled by substituting or by ignoring the missed *** that,the data are transmuted into a normalized ***,to enhance the classification performance,the data’s dimensionalities are minimized by employing Gaussian Kernel(GK)-Fisher Discriminant Analysis(GK-FDA).Afterwards,the processed data is submitted to the partitioning phase after transmuting it into a structured *** the partition phase,by utilizing the MD-PAM,the data are partitioned along with grouped into a ***,by employing CG-ANN,the data are classified in the classification phase so that the needed data can be effortlessly retrieved by the *** analogize the outcomes of the CG-ANN with the prevailing methodologies,the NSL-KDD openly accessible datasets are *** experiential outcomes displayed that an efficient result along with a reduced computation cost was shown by the proposed *** proposed work outperforms well in terms of accuracy,sensitivity and specificity than the existing systems.

关键词： Big data artiﬁcial neural network ﬁsher discriminant analysis distribution preserving framework manhattan distance

Multidisciplinary management of patients with post-inflammatory pancreatic necro

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Hepatobiliary & Pancreatic Diseases International 2021年第1期20卷 1-3页

作者： Santhalingam Jegatheeswaran joe Geraghty Ajith K Siriwardena Regional Hepato-Pancreato-Biliary Surgery Unit Manchester Royal InfirmaryOxford RoadManchester M139WLUK Department of Gastroenterology Manchester Royal InfirmaryOxford RoadManchester M139WLUK Faculty of Biology Medicine and HealthUniversity of ManchesterManchester M139PLUK

Current knowledge of the pathophysiology of acute pancreatitis indicates that pancreatic injury originates at the acinar cell level and then extends through a spectrum of damage ranging from mild peri-acinar inflammatory infiltration and edema to extensive pancreatic parenchymal and peri-pancreatic necrosis[1,2].Clinical acute pancreatitis correlates closely with this range of injury with the majority of patients experiencing mild disease,some having transient organ dysfunction which typically recovers after adequate resuscitation(moderate acute pancreatitis)and a variable minority exhibiting sustained organ failure together with radiological evidence of pancreatic necrosis(severe acute pancreatitis)[2,3].Worldwide,the management of this latter category of patients with severe acute pancreatitis remains a *** is no effective direct medical treatment and there is no role for early pancreatic debridement[3,4].This article provides a concise summary of current multidisciplinary management of patients with post-inflammatory pancreatic necrosis.

关键词： acute patients sustained

Evaluation of seismic potential in a longwall mine with massive sandstone roof under deep overburden

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International Journal of Mining Science and Technology 2018年第1期28卷 115-119页

作者： Mark A.Van Dyke Wen H.Su joe Wickline Ground Control Branch NIOSHPittsburgh15236 PAUSA Coronado Coal LLC BeckleyWVUSA

A recent seismic event was recorded by a deep longwall mine in Virginia at 3.7 ML on the local magnitude scale and 3.4 MMS by the United States Geological Survey(USGS) in *** investigations by the National Institute for Occupational Safety and Health(NIOSH) and Coronado Coal researchers have shown that this event was associated with geological features that have also been associated with other, similar seismic events in *** mapping and geological exploration in the mining area has made it possible to forecast possible locations for future seismic *** order to use the geology as a forecaster of mining-induced seismic events and their energy potential, two primary components are *** first component is a long history of recorded seismic events with accurately plotted *** second component is a high density of geologic data within the mining *** this case, 181 events of 1.0 MLor greater were recorded by the mine's seismic network between January, 2009, and October, *** the mining area, 897 geophysical logs, 224 core holes, and 1031 fiberscope holes were examined by mine *** this information, it was found that overburden thickness, sandstone thickness, and sandstone quality contributed greatly to seismic *** the data was analyzed, a pattern became apparent indicating that the majority of seismic events occurred under specific *** forecast maps were created based on geology of previous seismic *** forecast maps have shown an accuracy of within 74%–89% when compared to the recorded 181 events that were1.0 MLor greater when considering three major geological criteria of overburden thickness of 579.12 m or greater, 6.096–12.192 m of sandstone within 15.24 m of the Pocahontas number 3 seam, and a longwall caving height of 4.572 m or less.

关键词： Seismic Mapping Deep overburden Massive sandstone

Application of the coal mine floor rating(CMFR)to assess the floor stability in a Central Appalachian Coal Mine

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International Journal of Mining Science and Technology 2021年第1期31卷 83-89页

作者： Sena Cicek Ihsan Berk Tulu Mark Van Dyke Ted Klemetti joe Wickline Department of Mining Engineering West Virginia UniversityMorgantownWV 26505USA National Institute for Occupational Safety and Health Pittsburgh Mining Research DivisionPittsburghPA 15236USA Coronado Global Resources Inc. BeckleyWV 25801USA

Estimating the overall floor stability in a coal mine using deterministic methods which require complex engineering properties of floor strata is desirable,but generally it is impractical due to the difficulty of gathering essential input ***,applying a quantitative methodology to describe floor quality with a single number provides a practical estimate for preliminary assessment of floor *** coal mine floor rating(CMFR)system,developed by the University of New South Wales(UNSW),is a rockmass classification system that provides an indicator for the competence of floor *** most significant components of the CMFR are uniaxial compressive strength and discontinuity intensity of floor *** addition to the competence of the floor,depth of cover and stress notch angle are input parameters used to assess the preliminary floor *** this study,CMFR methodology was applied to a Central Appalachian Coal Mine that intermittently experienced floor *** drill core data,overburden maps,and mine plans were utilized for the ***,qualitative data(failure/non-failure)on floor conditions of the mine entries near the core holes was collected and analyzed so that the floor quality and its relation to entry stability could be estimated by statistical *** was found that the current CMFR classification system is not directly applicable in assessing the floor stability of the Central Appalachian Coal *** order to extend the applicability of the CMFR classification system,the methodology was modified.A calculation procedure of one of the CMFR classification system’s components,the horizontal stress rating(HSR),was changed and new parameters were added to the HSR.

关键词： Rock mass classification Coal mine floor rating(CMFR) Floor heave Floor failure Buckling failure mechanism