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Radial Basis Approximations Based BEMD for Enhancement of Non-Uniform Illumination Images

Computer Systems Science & Engineering 2023年第5期45卷 1423-1438页

作者： Anchal tyagi Salem Alelyani Sapna.k.tiyar Mohammad Rashid Hussain Rijwan khan Mohammed Saleh Alsaqer Indraprastha Engineering College Sahibabad Industrial AreaSahibabadGhaziabad201010Uttar PradeshIndia Centre for Artificial Intelligence(CAI) College of Computer ScienceKing Khalid UniversityAbhaSaudi Arabia ABES Institute of Technology GhaziabadUttar PradeshIndia

An image can be degraded due to many environmental factors like foggy or hazy weather,low light conditions,extra light conditions *** captured under the poor light conditions is generally known as non-uniform illumination ***-uniform illumination hides some important information present in an image during the image capture Also,it degrades the visual quality of image which generates the need for enhancement of such *** techniques have been present in literature for the enhancement of such type of *** this paper,a novel architecture has been proposed for enhancement of poor illumination images which uses radial basis approximations based BEMD(Bi-dimensional Empirical Mode Decomposition).The enhancement algorithm is applied on intensity and saturation components of ***,intensity component has been decomposed into various bi-dimensional intrinsic mode function and residue by using sifting ***,some linear transformations techniques have been applied on various bidimensional intrinsic modes obtained and residue and further on joining the transformed modes with residue,enhanced intensity component is *** part of an image is then enhanced in accordance to the enhanced intensity *** enhanced image can be obtained by joining the hue,enhanced intensity and enhanced saturation parts of the given *** proposed algorithm will not only give the visual pleasant image but maintains the naturalness of image also.

关键词： Non-uniform illumination BEMD intrinsic modes radial basis approximation linear transformation

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Simulation of Runoff and Sediment Yield for a Himalayan Watershed Using SWAT Model

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Journal of Water Resource and Protection 2010年第3期2卷 267-281页

作者： Sanjay k. Jain Jaivir tyagi Vishal Singh 不详

Watershed is considered to be the ideal unit for management of the natural resources. Extraction of water-shed parameters using Remote Sensing and Geographical Information System (GIS) and use of mathematical models is the current trend for hydrologic evaluation of watersheds. The Soil and Water Assessment Tool (SWAT) having an interface with ArcView GIS software (AVSWAT2000/X) was selected for the estimation of runoff and sediment yield from an area of Suni to kasol, an intermediate watershed of Satluj river, located in Western Himalayan region. The model was calibrated for the years 1993 & 1994 and validated with the observed runoff and sediment yield for the years 1995, 1996 and 1997. The performance of the model was evaluated using statistical and graphical methods to assess the capability of the model in simulating the run-off and sediment yield from the study area. The coefficient of determination (R2) for the daily and monthly runoff was obtained as 0.53 and 0.90 respectively for the calibration period and 0.33 and 0.62 respectively for the validation period. The R2 value in estimating the daily and monthly sediment yield during calibration was computed as 0.33 and 0.38 respectively. The R2 for daily and monthly sediment yield values for 1995 to 1997 was observed to be 0.26 and 0.47.

关键词： AVSWATX Calibration Validation Image Processing Remote Sensing GIS Runoff Sediment Yield

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Analysis of soil moisture variation by forest cover structure in lower western Himalayas, India

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Journal of Forestry Research 2013年第2期24卷 317-324页

作者： J. V. tyagi Nuzhat Qazi S. P. Rai M. P. Singh National Institute of Hydrology Forest Research Institute

Soil moisture affects various hydrological processes, including evapotranspiration, infiltration, and runoff. Forested areas in the lower western Himalaya in India constitute the headwater catchments for many hill streams and have experienced degradation in forest cover due to grazing, deforestation and other human activities. This change in forest cover is likely to alter the soil moisture regime and, consequently, flow regimes in streams. The effect of change in forest cover on soil moisture regimes of this dry region has not been studied through long term field observations. We monitored soil matric potentials in two small watersheds in the lower western Himalaya of India. The watersheds consisted of homogeneous land covers of moderately dense oak forest and moderately degraded mixed oak forest. Observations were recorded at three sites at three depths in each watershed at fortnightly intervals for a period of three years. The soil moisture contents derived from soil potential measurements were analyzed to understand the spatial, temporal and profile variations under the two structures of forest cover. The analysis revealed large variations in soil moisture storage at different sites and depths and also during different seasons in each watershed. Mean soil moisture storage during monsoon, winter and summer seasons was higher under dense forest than under degraded forest. Highest soil moisture content occurred at shallow soil profiles, decreasing with depth in both watersheds. A high positive correlation was found between tree density and soil moisture content. Mean soil moisture content over the entire study period was higher under dense forest than under degraded forest. This indicated a potential for soil water storage under well managed oak forest. Because soil water storage is vital for sustenance of low flows, attention is needed on the management of oak forests in the Himalayan region.

关键词： soil moisture oak forest soil matric potential tree density degraded forest

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Development of Advanced Biomass Cookstove and Performance Comparisons Using the Modified Star Rating Methodology

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Energy Engineering 2021年第5期118卷 1237-1251页

作者： Himanshu kunwar Pal Sanjeev Jain S.k.tyagi Department of Energy Science and Engineering Indian Institute of Technology DelhiHauz KhasNew Delhi110016India Department of Chemical Engineering Indian Institute of Technology DelhiHauz KhasNew Delhi110016India Department of Mechanical Engineering Indian Institute of Technology DelhiHauz KhasNew Delhi110016India

A disruptive approach to a fundamental process has been applied in a biomass combustion device with two variable speed fans to supply air for gasification and another for combustion processes,***,the preheating of secondary air,required for combustion process was also ensured through annulus chamber before being fed into the combustion *** turbulent flow and homogenous mixing were also ensured by controlling the flow rate resulting in the reduced emissions of carbon monoxide(CO)and fine particulate matter(PM 2.5,particulate matter having aerodynamic diameterkstove models,and very close to that of a liquefied petroleum gas(LPG)***,the comparative analysis based on the modified star rating of total 15(14 are biomass and another LPG)cookstove models tested using the same standard methodology has been done and presented in this *** on the star rating,the performance of the LPG stove was found to be best and assigned as a 5-star product followed by the IITD model(4-star),while the other 13 models got different ratings starting from 1-star to 3-star,***,the thermal performance of the IITD cookstove model is found to be the highest,while the emission characteristics are found to be the least among all biomass cookstove models,presented here.

关键词： Star rating biomass pellet cookstove thermal performance fine particulate matter(PM2.5) carbon monoxide

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Reliability Analysis of a Powerloom Plant Using Interval Valued Intuitionistic Fuzzy Sets

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Applied Mathematics 2014年第13期5卷 2008-2015页

作者： Sanjay kumar tyagi General Requirements Department Ibri College of Applied Sciences Ministry of Higher Education Ibri Sultanate of Oman

In this paper, we investigate the reliability analysis of a powerloom plant by using interval valued intuitionistic fuzzy sets (IVIFS). Herein, we modeled a powerloom plant as a gracefully degradable system having two units A(n) and B(m) connected in series. The reliability ofncomponents of unitAandmcomponents of unitBis assumed to be an IVIFS defined over the universe of discourse [0, 1]. Thus, the reliability of the system obtained is an IVIFS that covers the inherited uncertainty in data collection and reliability evaluation of a powerloom plant.

关键词： Reliability Interval Valued Intuitionistic Fuzzy Sets Powerloom Plant Parallel Redundancy Graceful Degradation

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A Beacon of Peace for tthe World

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中印对话（英文版） 2023年第5期37卷 22-23页

作者： Yogeshwar tyagi Indo-China Friendship Culture Centrebased in Uttar Pradesh India

The idea of global security emerged in the 1990s in response to global challenges such as global warming,international terrorism,and health emergencies like AIDS and bird *** security,sometimes also referred to as international security,is a term that refers to the measures taken by governments and international organizations such as the United Nations,the European Union,and others to ensure the survival and security of all.

关键词： Peace Beacon security

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Variation in Parameters of Ambient Air Quality in National Capital Territory (NCT) of Delhi (India)

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Atmospheric and Climate Sciences 2015年第1期5卷 13-22页

作者： Anunay A. Gour Santosh k. Singh Sushil k. tyagi Anubha Mandal Department of Environmental Engineering Delhi Technological University (Formerly Delhi College of Engineering) Delhi India Central Pollution Control Board (CPCB) Delhi India

Air Pollution is an escalating problem worldwide fuelled by increasing anthropogenic activities, speedy development, rapid industrialization, transportation, superfluous use of fossil fuel consumption, increasing global power needs, etc. Also the diverse meteorological factors influence our environment to a great extent. Population explosion has led to rema.k.ble increase in vehicular population. The use solely depends upon the lifestyle of the citizen. Any change in the lifestyle has a rema.k.ble effect on the air we breathe. A comprehensive database for pollution levels from the year 2006 to 2010 was analyzed for a main traffic intersection and a non-traffic area in Delhi (India). The paper asserts that pollutant concentration levels on weekend are lower than those on weekdays (increase on Sundays with respect to weekdays is CO 2.98 times, PM2.5 1.18 times, NO 1.62 times, NO2 5.76 times, SO2 1.27 times and O3 1.15 times). The pollution levels have been found to attenuate on public holidays and weekends. Pollution can hence be related to the weekly cycle of human activities. Pollutions due to vehicular emissions on roads, rails, air or water all serve as major sources of pollution. Hence, viably possible solutions for pollution control can also be achieved by controlling the magnitude of traffic flow on roads.

关键词： Ambient Air Quality Emission Seasonal Variation Weekend Effect Delhi

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二阶Newton法训练径向基函数神经网络的算法研究

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计算机研究与发展 2015年第7期52卷 1477-1486页

作者：蔡珣陈智 kanishka tyagi 于宽李子强朱波山东大学计算机科学与技术学院济南250101 德克萨斯大学阿灵顿分校电子工程系美国阿灵顿76019 山东建筑大学材料科学与工程学院济南250101 山东大学材料科学与工程学院济南250061

提出了一种混合加权距离测量(weighted distance measure,weighted DM)参数的构建和训练RBF(radial basis function)神经网络的两步批处理算法.该算法在引进了DM系数参数的基础上,采用Newton法分别对径向基函数的覆盖参数、均值向量参... 详细信息

提出了一种混合加权距离测量(weighted distance measure,weighted DM)参数的构建和训练RBF(radial basis function)神经网络的两步批处理算法.该算法在引进了DM系数参数的基础上,采用Newton法分别对径向基函数的覆盖参数、均值向量参数、加权距离测度系数以及输出权值进行了优化,并在优化过程中利用OLS(orthogonal least squares)法来求解Newton法的方程组.通过实验数据,不仅分析了Newton法优化的各个参数向量对RBF网络训练的影响,而且比较了混合优化加权DM与RLS-RBF(recursive least square RBF neural network)网络训练算法的收敛性和计算成本.所得到的结论表明整合了优化参数的加权DM-RBF网络训练算法收敛速度比RLS-RBF网络训练算法更快,而且具有比LM-RBF(Levenberg-Marquardt RBF)训练算法更小的计算成本,从而说明OLS求解的Newton法对优化RBF网络参数具有重要应用价值.

关键词：径向基函数神经网络 Hessian矩阵 Newton法正交最小二乘法网络参数优化最优学习因子

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A Novel Pa.k.t Switch Node Architecture for Contention Resolution in Synchronous Optical Pa.k.t Switched Networks

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International Journal of Communications, Network and System Sciences 2009年第6期2卷 562-568页

作者： Virendra Singh SHEkHAWAT Dinesh kumar tyagi V. k. CHAUBEY 不详

Pa.k.t contention is a.k.y issue in optical pa.k.t switch (OPS) networks and finds a viable solution by including optical buffering techniques incorporating fiber delay lines (FDLs) in the switch architecture. The present paper proposes a novel switch architecture for pa.k.t contention resolution in synchronous OPS network employing the pa.k.t circulation in FDLs in a synchronized manner. A mathematical model for the proposed switch architecture is developed employing pa.k.t queuing control to estimate the blocking probability for the incoming traffic. The switch performance is analyzed with a suitable contention resolution al-gorithm through the computer simulation. The simulation results substantiate the proposed model for the switch architecture.

关键词： Fiber Delay Lines Pa.k.t Circulation Optical Pa.k.t Switch Networks Pa.k.t Delay Probability Contention Resolution

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Liposome mediated drug delivery for leukocyte adhesion deficieny I （LAD I）： Targeting the mutated gene ITGB2 and expression of CD18 protein

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Frontiers in Biology 2014年第1期9卷 1-4页

作者： C. Subathra DEVI kritika.k.DARINATH Payal CHOUDHARY Vishakha tyagi Mohanasrinivasan. V School of Biosciences and Technology VIT University Vellore 632014 Tamil Nadu India

Leukocyte adhesion deficiency （LAD） I is a disorder caused due to mutations in a gene （ITGB2） located on chromosome 21 and encodes the β2 subunit of the leukocyte integrin molecules. This leads to defects in the adhesion of leukocytes on endothelial cells which further leads to recurrent microbial infections due to a decrease in the immune response. Base Excision Repair Mechanism （BER） is instrumental in repairing damaged DNA by removing mutated/ damaged bases. We have proposed a hypothesis for the treatment of LAD I by making use of the proteins/enzyme complexes responsible for base excision repair mechanism be introduced into the leukocytes via liposomes. This will target the mutated gene in the leukocytes （mostly neutrophils） and DNA repair will occur. The liposomes can be introduced into the patients via intravenous methods.

关键词： CDI8 β-integrin LAD I liposome BER ITGB2

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