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Fast Single Image Haze Removal Method for Inhomogeneous Environment Using Variable Scattering Coefficient

Computer Modeling in Engineering & Sciences 2020年第6期123卷 1175-1192页

作者： Rashmi gupta Manju Khari Vipul Gupta Elena Verdú Xing Wu Enrique Herrera-Viedma Rubén González Crespo Ambedkar Institute of Advanced Communication Technologies and Research New Delhi110031India Escuela Superior de Ingeniería y Tecnología Universidad Internacional de La RiojaLogroño26006Spain School of Computer Engineering and Science Shanghai UniversityShanghai200444China Escuela Técnica Superior de Ingenierías Informática y de Telecomunicación Universidad de GranadaGranada18071Spain

The images capture in a bad environment usually loses its fidelity and contrast.As the light rays travel towards its destination they get scattered several times due to the tiny particles of fog and pollutants in the environment,therefore the energy gets lost due to multiple scattering till it arrives its destination,and this degrades the images.So the images taken in bad weather appear in bad quality.Therefore,single image haze removal is quite a bit tough task.Significant research has been done in the haze removal algorithm but in all the techniques,the coefficient of scattering is taken as a constant according to the homogeneous atmosphere but in real time this does not happen.Therefore,this paper introduces a simple and efficient method so that the scattering coefficient becomes variable according to the inhomogeneous environment.Then,this research aims to remove the haze with the help of a fast and effective algorithm i.e.,Prior Color Fading,according to the inhomogeneous environmental properties.Thereby,to filter the depth map,the authors used a weighted guided image filtering which removes the drawbacks of guided image filter.Afterwards the scattering coefficient is made variable according to the inhomogeneous atmosphere and then the Simple Color Balance Algorithm is applied so that the readability property of images can be increased.The proposed method tested on various general outdoor images and synthetic hazy images and analyzed on various parameters Mean Square Error(MSE),Root Mean Square Error(RMSE),Peak Signal to Noise Ratio(PSNR),Mean Structural Similarity(MSSIM)and the Universal Objective Quality Index(UQI).Experimental results for the proposed method show that the proposed approach provides better results as compared to the state-of-the-art haze removal algorithms.

关键词： Image dehazing scattering coefficient simple color balance inhomogeneous environment

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Optimization of Transducer Location for Novel Non-Intrusive Methodologies of Diagnosis in Diesel Engines

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Sound & Vibration 2021年第3期55卷 221-234页

作者： S.Narayan M.U.Kaisan Shitu Abubakar Faisal O.Mahroogi Vipul Gupta Department of Mechanical Engineering Qassim UniversityBuraydah51452Saudi Arabia Department of Mechanical Engineering Ahmadu Bello UniversityZaria810211Nigeria Department of Mechanical Engineering Islamic University of MadinaMedina42351Saudi Arabia Department of Mechanical Engineering Indus International UniversityUna174301India

The health monitoring has been studied to ensure integrity of design of engine structure by detection,quantification,and prediction of damages.Early detection of faults may allow the downtime of maintenance to be rescheduled,thus preventing sudden shutdown of machines.In cylinder pressure developed,vibrations and noise emissions data provide a rich source of information about condition of engines.Monitoring of vibrations and noise emissions are novel non-intrusive methodologies for which positioning of various transducers are important issue.The presented work shows applicability of these diagnosis methodologies adopted in case of diesel engines.The effects of changing various fuel injection parameters was analyzed.Scope of using non-intrusive technique has been analyzed by changing locations of microphone.Novelty of this worklies in exploring signal processing methods for various locations around the engine test set up.Various frequency ranges of contributing noise and vibration sources were identified.Time-Frequency analysis showed the onset of various cyclic.Based on the identification of various frequency bands,it is possible to device suitable filters in order to extract more information.

关键词： IC engines automotive vibrations and noise emissions condition monitoring specialized industrial machinery and equipment

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Bilateral segmental pelvic and femoral fractures in a young female： A rare case report

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Chinese Journal of Traumatology 2016年第5期19卷 286-289页

作者： Raju Vaishya Amit Kumar Agarwal Nishint gupta vipul Vijay Department of Orthopaedics and Joint Replacement Surgery lndraprastha Apollo Hospitals New Delhi 110076 India

尽管有前进，多重复杂受伤病人的管理在现代医疗保健仍然是大挑战。我们在场与双边的部分大腿骨的柄联系的双边的不稳定的骨盆的破裂的一个稀罕案例断裂。我们建议了如此的复杂损害模式的机制并且讨论了管理的计划。在稳定病人的医学上... 详细信息

尽管有前进，多重复杂受伤病人的管理在现代医疗保健仍然是大挑战。我们在场与双边的部分大腿骨的柄联系的双边的不稳定的骨盆的破裂的一个稀罕案例断裂。我们建议了如此的复杂损害模式的机制并且讨论了管理的计划。在稳定病人的医学上帮助了我们的病人克服这些严重、致命的损害后不久，我们相信修理所有专业的及时、好攻击的外科的干预断裂。由进行为如此的复杂破裂的管理建立一个最佳的协议是必要的未来并且 multicentric 以后学习。

关键词：骨盆大腿骨的破裂肋骨破裂

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Effects of particle size on the triboelectrification phenomenon in pharmaceutical excipients:Experiments and multi-scale modeling

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Asian Journal of Pharmaceutical Sciences 2016年第5期11卷 603-617页

作者： Raj Mukherjee Vipul Gupta Shivangi Naik Saurabh Sarkar Vinit Sharma Prasad Peri Bodhisattwa Chaudhuri Department of Pharmaceutical Sciences University of ConnecticutStorrsCT 06269USA Institute of Material Sciences University of ConnecticutStorrsCT 06269USA Merck Sharp and Dohme West PointPA 19486USA

Particle sizes play a major role to mediate charge transfer, both between identical and different material surfaces. The study probes into the probable mechanism that actuates opposite polarities between two different size fractions of the same material by analyzing the charge transfer patterns of two different sizes of microcrystalline cellulose(MCC). Quantum scale calculations confirmed alteration of charge transfer capacities due to variation of moisture content predicted by multiple surface and bulk analytical techniques. Discrete Element Method(DEM) based multi-scale computational models pertinent to predict charge transfer capacities were further implemented, and the results were in accordance to the experimental charge profiles.

关键词： Tribocharging Work function Excipient Discrete Element Modeling

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