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Learning physically based material and lighting decompositions for face editing

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Computational Visual Media 2024年第2期10卷 295-308页

作者： Qian Zhang vikas Thamizharasan James Tompkin Brown University ProvidenceRhode Island 02906USA

Lighting is crucial for portrait photography,yet the complex interactions between the skin and incident light are expensive to model computationally in graphics and difficult to reconstruct analytically via computer ***,to allow fast and controllable reflectance and lighting editing,we developed a physically based decomposition through deep learned priors from path-traced portrait *** approaches that used simplified material models or low-frequency or low-dynamic-range lighting struggled to model specular reflections or relight directly without intermediate ***,we estimate the surface normal,skin albedo and roughness,and high-frequency HDRI maps,and propose an architecture to estimate both diffuse and specular reflectance *** our experiments,we show that this approach can represent the true appearance function more effectively than simpler baseline methods,leading to better generalization and higher-quality editing.

关键词： intrinsic decomposition portrait relighting inverse rendering deep learning

EPASAD:ellipsoid decision boundary based Process-Aware Stealthy Attack Detector

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Cybersecurity 2024年第3期7卷 32-48页

作者： vikas Maurya Rachit Agarwal Saurabh kumar Sandeep Shukla Department of Computer Science and Engineering Indian Institute of Technology KanpurkanpurIndia Merkle Science BangaloreIndia

Due to the importance of Critical Infrastructure(Cl)in a nation's economy,they have been lucrative targets for cyber *** critical infrastructures are usually Cyber-Physical Systems such as power grids,water,and sewage treatment facilities,oil and gas pipelines,*** recent times,these systems have suffered from cyber attacks numer-ous *** have been developing cyber security solutions for Cls to avoid lasting *** to standard frameworks,cyber security based on identification,protection,detection,response,and recovery are at the core of these *** of an ongoing attack that escapes standard protection such as firewall,anti-virus,and host/network intrusion detection has gained importance as such attacks eventually affect the physical dynamics of the ***,anomaly detection in physical dynamics proves an effective means to implement *** is one example of anomaly detection in the sensor/actuator data,representing such systems physical *** present EPASAD,which improves the detection technique used in PASAD to detect these micro-stealthy attacks,as our experiments show that PASAD's spherical boundary-based detection fails to *** method EPASAD overcomes this by using Ellipsoid boundaries,thereby tightening the boundaries in various dimen-sions,whereas a spherical boundary treats all dimensions *** validate EPASAD using the dataset produced by the TE-process simulator and the C-town *** results show that EPASAD improves PASAD's average recall by 5.8%and 9.5%for the two datasets,respectively.

关键词： Intrusion detection system Critical infrastructure security Industrial control system Machine learning

Cryogenic and conventional milling of AZ91 magnesium alloy

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Journal of Magnesium and Alloys 2024年第6期12卷 2503-2519页

作者： vikas Marakini Srinivasa Pai P Gururaj Bolar Bhaskara P Achar Department of Mechanical Engineering Nitte(Deemed to be University)NMAM Institute of Technology(NMAMIT)Nitte 574110India Department of Mechanical and Industrial Engineering Manipal Institute of TechnologyManipal Academy of Higher EducationManipal 576104India

Use of magnesium is the need of the hour due to its low density as well as its high strength-to-weight and stiffness-to-weight ratio *** study focuses on the effectiveness of liquid nitrogen(LN_(2))assisted cryogenic machining on the surface integrity(SI)characteristics of AZ91 magnesium *** milling using uncoated carbide inserts have been performed under liquid nitrogen(LN_(2))assisted cryogenic condition and compared with conventional(dry)*** are performed using machining parameters in terms of cutting speeds of 325,475,625 m/min,feed rates of 0.05,0.1,0.15 mm/teeth and depth of cuts of 0.5,1,1.5 mm *** significant surface integrity characteristics such as surface roughness,microhardness,microstructure,and residual stresses have been *** of SI characteristics with respect to milling parameters have been identified using statistical technique such as ANOVA and signal-to-noise(S/N)ratio ***,the multi criteria decision making(MCDM)techniques such as additive ratio assessment method(ARAS)and complex proportional assessment(COPRAS)have been utilized to identify the optimal conditions for milling AZ91 magnesium alloy under both dry and cryogenic *** of LN_(2)during machining,resulted in reduction in machining temperature by upto 29%with a temperature drop from 251.2℃under dry condition to 178.5℃in cryogenic *** showed the advantage of performing cryogenic milling in improving the surface integrity to a significant *** machining considerably minimized the roughness by upto 28%and maximised the microhardness by upto 23%,when compared to dry *** speed has caused significant impact on surface roughness(95.33%-dry,92.92%-cryogenic)and surface microhardness(80.33%-dry,82.15%-cryogenic).Due to the reduction in machining temperature,cryogenic condition resulted in compressive residual stresses(maximumσ║=-113 MPa)on the alloy *** indicate no

关键词： Magnesium alloy Cryogenic machining Roughness Microhardness Microstructure Residual stress Multi criteria decision making

Federated Learning on Internet of Things:Extensive and Systematic Review

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Computers, Materials & Continua 2024年第5期79卷 1795-1834页

作者： Meenakshi Aggarwal vikas khullar Sunita Rani Thomas AndréProla Shyama Barna Bhattacharjee Sarowar Morshed Shawon Nitin Goyal Chitkara University Institute of Engineering and Technology Chitkara UniversityRajpuraPunjab140401India Department of CSE&IT BPS Mahila VishwavidyalayaKhanpur KalanSonipatHaryana131305India Engineering Research&Innovation Group Universidad Europea del AtlánticoC/Isabel Torres 21Santander39011Spain Department of Project Management Universidad Internacional IberoamericanaAreciboPR00613USA Department of Project Management Universidade Internacional do CuanzaEstrada Nacional 250Bairro KaluapandaCuito-BiéAngola Department of Computer Science and Engineering University of Science and Technology Chittagong(USTC)Chattogram4202Bangladesh Deptartment of EEE University of Science and Technology Chittagong(USTC)Chattogram4202Bangladesh Department of Computer Science and Engineering School of Engineering and TechnologyCentral University of HaryanaMahendragarhHaryana123031India

The proliferation of IoT devices requires innovative approaches to gaining insights while preserving privacy and resources amid unprecedented data ***,FL development for IoT is still in its infancy and needs to be explored in various areas to understand the key challenges for deployment in real-world *** paper systematically reviewed the available literature using the PRISMA guiding *** study aims to provide a detailed overview of the increasing use of FL in IoT networks,including the architecture and challenges.A systematic review approach is used to collect,categorize and analyze FL-IoT-based *** was performed in the IEEE,Elsevier,Arxiv,ACM,and WOS databases and 92 articles were finally *** measures were published in English and with the keywords“FL”and“IoT”.The methodology begins with an overview of recent advances in FL and the IoT,followed by a discussion of how these two technologies can be *** be more specific,we examine and evaluate the capabilities of FL by talking about communication protocols,frameworks and *** then present a comprehensive analysis of the use of FL in a number of key IoT applications,including smart healthcare,smart transportation,smart cities,smart industry,smart finance,and smart *** key findings from this analysis of FL IoT services and applications are also ***,we performed a comparative analysis with FL IID(independent and identical data)and non-ID,traditional centralized deep learning(DL)*** concluded that FL has better performance,especially in terms of privacy protection and resource *** is excellent for preserving privacy becausemodel training takes place on individual devices or edge nodes,eliminating the need for centralized data aggregation,which poses significant privacy *** facilitate development in this rapidly evolving field,the insights presented are intended to help practitioners and re

关键词： Internet of Things federated learning PRISMA framework of FL applications of FL data privacy communication

Predictive value of neutrophil-to-lymphocyte ratio in in-hospital mortality in sepsis patients:A cross-sectional study

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Journal of Acute Disease 2024年第3期13卷 106-110页

作者： Pankaj kumar Jain Manoj Seval vikas Meena Dinesh kumar Meena Department of Internal Medicine Government Medical CollegeKotaIndia

Objective:To explore the predictive value of neutrophil-to-lymphocyte ratio(NLR)in in-hospital mortality in sepsis ***:A prospective observational cross-sectional study was conducted on 100 patients with *** data about the patient’s demography,medical history,general examination including pulse rate,blood pressure,etc,use of vasopressor support,need for renal replacement therapy,mechanical ventilation,outcome,and lab parameters including total lymphocyte count with neutrophil-to-lymphocyte ratio were *** parameters between survivals and non-survivals were ***:Out of 100 patients,80%were from rural *** patients were 50 to 59 years old.26 Patients were *** patients in the nonsurvivor group were older and more had a history of diabetes mellitus when compared with the survivor *** non-survivor group had a higher NLR,APACHE栻,and SOFA ***:NLR is a readily available parameter and can be used as a good prognostic indicator for mortality in sepsis patients.

关键词： Neutrophil-to-lymphocyte ratio Sepsis Intensive Care Unit Mortality APACHE score SOFA score

A retrospective epidemiological review of maxillofacial injuries in a tertiary care centre in Goa,India

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Chinese Journal of Traumatology 2024年第5期27卷 263-271页

作者： Purva Vijay Sinai khandeparker Trishala Bhadauria Fernandes vikas Dhupar Francis Akkara Omkar Anand Shetye Rakshit Vijay Sinai khandeparker Goa Dental College and Hospital Bambolim 403202GoaIndia

Purpose:Trauma accounts for the leading cause of morbidity and mortality worldwide in the present day and may rightly be called the new pandemic. The prominent nature of the face exposes it to various traumatic injuries. A timely, prompt diagnosis along with employment of correct and quick treatment greatly improves the outcome for these patients. The aim of this retrospective study was to analyse the characteristics of maxillofacial injuries over a ***:The data were collected manually from the medical records of patients who reported to the tertiary centre from 1 January 2011 to 31 December 2019. All injured patients irrespective of age/gender with complete hospital records of clinical and radiographical diagnosis of maxillofacial injuries were included. The demographic data, etiology, site and type of injury, and seasonal variation were analyzed. Data were tabulated into 6 age groups (0 -7 years, 8 -18 years, 19 -35 years, 36 -40 years, 41 -59 years, and > 60 years). Five etiological factors, i.e. road traffic accidents, falls, assaults, sports-related, and occupational accidents, were further evaluated based on genders. Facial injuries were classified into 6 types: panfacial fractures, mandibular fractures (subcategorized), midface fractures (subcategorized), dentoalveolar fractures, dental injuries, and soft tissue injuries. The monthly and seasonal variation of the injuries was also charted. Data were expressed as frequency and ***:A total of 10,703 maxillofacial injuries were included from the tertiary centre from the period of 2011 -2019, including 8637 males and 2066 females, with the highest occurrence in the 19 -35 years age group. Road traffic accident was the principal etiological factor of maxillofacial injuries in both genders (80.5%), followed by falls (9.6%), assaults (8.0%), occupational accidents (1.2%), and sporting injuries (0.7%). Midface fractures accounted for 52.5% (5623 fractures), followed by mandibular fractures (38.

关键词： Maxillofacial injuries Epidemiology Fractures

Lossy mode resonance-based uniform core tapered fiber optic sensor for sensitivity enhancement

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Communications in Theoretical Physics 2020年第9期72卷 104-110页

作者： vikas keshav Walia R k Verma Department of Physics Central University of RajasthanNH-8 BandarsindriAjmer-305817RajasthanIndia Department of Physics DAV UniversityJalandhar-144012PunjabIndia

A lossy mode resonance(LMR)-supported fiber optic sensor in which a uniform fiber core is placed among two identical tapered regions, is investigated numerically. Indium tin oxide(ITO)and aluminum-doped zinc oxide(AZO) are considered as LMR active materials used to excite several lossy modes and gold and silver are used as surface plasmon resonance(SPR) active materials. In this probe design, a central uniform core coated with ITO/AZO is the active sensing region, whereas tapered regions are meant for bringing the incident angle close to the critical angle. The sensitivity of the present fiber optic bio-sensor is evaluated for first two LMRs utilizing both ITO and AZO separately, along with its variation with the taper ratio(TR). For ITO, the maximum sensitivity values are observed to be 18.425 μm RIU^(-1)(refractive index unit)and 0.825 μm RIU^(-1), corresponding to the first and second LMRs, respectively, at a TR of 1.6 and for AZO, equivalent values are 0.79 μm RIU^(-1) and 0.35 μm RIU^(-1), respectively, at a TR of2.0. The results illustrate that the first LMR is more sensitive than the second LMR and the ITOcoated probe possesses greater sensitivity than the AZO-coated probe for both LMRs. Similarly,for the fiber optic SPR sensor, the maximum value of sensitivity is 5.6425 μm RIU^(-1), in the case of gold and 5.0615 μm RIU^(-1) in the case of silver, at a TR of 1.6. Hence, the result shows that the sensor with the present fiber optic probe design has around a 3-fold enhancement in sensitivity compared with conventional SPR sensors. This study will have applications in many sensing schemes where the requirement of large sensitivity is vital.

关键词： fiber optic sensors lossy modes surface plasmons indium tin oxide aluminum-doped zinc oxide sensitivity

Lie group analysis, numerical and non-traveling wave solutions for the (2+1)-dimensional diffusion–advection equation with variable coefficients

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Chinese Physics B 2014年第3期23卷 71-76页

作者： vikas kumar R.k.Gupta Ram Jiwari Department of Mathematics D.A.V.College Pundari School of Mathematics and Computer Applications Thapar University

In this paper, the variable-coefficient diffusion-advection （DA） equation, which arises in modeling various physical phenomena, is studied by the Lie symmetry approach. The similarity reductions are derived by determining the complete sets of point symmetries of this equation, and then exact and numerical solutions are reported for the reduced second-order nonlinear ordinary differential equations. Further, an extended （Gl/G）-expansion method is applied to the DA equation to construct some new non-traveling wave solutions.

关键词： diffusion-advection equation Lie group analysis numerical solutions extended (G'/G)-expansion method

Comparative study of travelling-wave and numerical solutions for the coupled short pulse (CSP) equation

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Chinese Physics B 2013年第5期22卷 60-66页

作者： vikas kumar R. k. Gupta Ram Jiwari School of Mathematics and Computer Applications Thapar University

The Lie symmetry analysis is performed for the coupled short plus （CSP） equation. We derive the infinitesimals that admit the classical symmetry group. Five types arise depending on the nature of the Lie symmetry generator. In all types, we find reductions in terms of system of ordinary differential equations, and exact solutions of the CSP equation are derived, which are compared with numerical solutions using the classical fourth-order Runge-kutta scheme.

关键词： coupled short pulse (CSP) equation Lie symmetric analysis Runge-kutta scheme exact solutions