检索结果-南通市图书馆

LoRa Sense:Sensing and Optimization of LoRa Link Behavior Using Path-Loss Models in Open-Cast Mines

Computer Modeling in Engineering & Sciences 2025年第1期142卷 425-466页

作者： bhanu Pratap Reddy Bhavanam Prashanth Ragam School of Computer Science and Engineering VIT-AP UniversityAmaravati52237India

The Internet of Things(IoT)has orchestrated various domains in numerous applications,contributing significantly to the growth of the smart world,even in regions with low literacy rates,boosting socio-economic *** study provides valuable insights into optimizing wireless communication,paving the way for a more connected and productive future in the mining *** IoT revolution is advancing across industries,but harsh geometric environments,including open-pit mines,pose unique challenges for reliable *** advent of IoT in the mining industry has significantly improved communication for critical operations through the use of Radio Frequency(RF)protocols such as Bluetooth,Wi-Fi,GSM/GPRS,Narrow Band(NB)-IoT,SigFox,ZigBee,and Long Range Wireless Area Network(LoRaWAN).This study addresses the optimization of network implementations by comparing two leading free-spreading IoT-based RF protocols such as ZigBee and *** field tests are conducted in various opencast mines to investigate coverage potential and signal *** is tested in the Tadicherla open-cast coal mine in ***,LoRaWAN field tests are conducted at one of the associated cement companies(ACC)in the limestone mine in Bargarh,India,covering both Indoor-toOutdoor(I2O)and Outdoor-to-Outdoor(O2O)environments.A robust framework of path-loss models,referred to as Free space,Egli,Okumura-Hata,Cost231-Hata and Ericsson models,combined with key performance metrics,is employed to evaluate the patterns of signal *** field testing and careful data analysis revealed that the Egli model is the most consistent path-loss model for the ZigBee protocol in an I2O environment,with a coefficient of determination(R^(2))of 0.907,balanced error metrics such as Normalized Root Mean Square Error(NRMSE)of 0.030,Mean Square Error(MSE)of 4.950,Mean Absolute Percentage Error(MAPE)of 0.249 and Scatter Index(SI)of *** the O2O scenario,the Ericsson model

关键词： Internet of things long range wireless area network ZigBee mining environments path-loss models coefficient of determination mean square error

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Multi-Scale Dilated Convolution Network for SPECT-MPI Cardiovascular Disease Classification with Adaptive Denoising and Attenuation Correction

引用

Computer Modeling in Engineering & Sciences 2025年第1期142卷 299-327页

作者： A.Robert Singh Suganya Athisayamani Gyanendra Prasad Joshi bhanu shr.stha Department of Computational Intelligence SRM Institute of Science and TechnologyKattankulathur603203Tamil NaduIndia School of Computing Sastra Deemed to be UniversityThanjavur613401Tamil NaduIndia Department of Artificial Intelligence&Software Kangwon National UniversitySamcheok25913Republic of Korea Department of Information Convergence System Graduate School of Smart ConvergenceKwangwoon UniversitySeoul01897Republic of Korea

Myocardial perfusion imaging(MPI),which uses single-photon emission computed tomography(SPECT),is a well-known estimating tool for medical diagnosis,employing the classification of images to show situations in coronary artery disease(CAD).The automatic classification of SPECT images for different techniques has achieved near-optimal accuracy when using convolutional neural networks(CNNs).This paper uses a SPECT classification framework with three steps:1)Image denoising,2)Attenuation correction,and 3)Image *** denoising is done by a U-Net architecture that ensures effective image *** correction is implemented by a convolution neural network model that can remove the attenuation that affects the feature extraction process of ***,a novel multi-scale diluted convolution(MSDC)network is *** merges the features extracted in different scales and makes the model learn the features more *** scales of filters with size 3×3 are used to extract *** three steps are compared with state-of-the-art *** proposed denoising architecture ensures a high-quality image with the highest peak signal-to-noise ratio(PSNR)value of *** proposed classification method is compared with the five different CNN models,and the proposed method ensures better classification with an accuracy of 96%,precision of 87%,sensitivity of 87%,specificity of 89%,and F1-score of 87%.To demonstrate the importance of preprocessing,the classification model was analyzed without denoising and attenuation correction.

关键词： SPECT-MPI CAD MSDC denoising attenuation correction classification

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Assessment of Seasonal and Site-Specific Variations in Soil Physical,Chemical and Biological Properties Around Opencast Coal Mines

引用

Pedosphere 2019年第5期29卷 642-655页

作者： bhanu PANDEY Arideep MUKHERJEE Madhoolika AGRAWAL Siddharth SINGH Laboratory of Air Pollution and Global Climate Change Department of BotanyBanaras Hindu UniversityVaranasi 221005 (India) Natural Resources and Environment Management Group Central Institute of Mining and Fuel Research (CSIR)Dhanbad 826 015 (India)

Coal mining adversely affects soil quality around opencast mines. Therefore, a study was conducted in 2010 and 2011 to assess seasonal and site-specific variations in physical, chemical, and biological properties of soil collected at different distances from mining areas in the Jharia coalfield, India. Throughout the year, the soil in sites near coal mines had a significantly higher bulk density, temperature, elec trical conductivity, and sulfate and heavy metal contents and a significantly lower water-holding capacity, porosity, moisture content, pH, and total nitrogen and available phosphorus contents, compared with the soil collected far from the mines. However, biological properties were site-specific and seasonal. Soil microbial biomass carbon (MBC) and nitrogen (MBN), MBC/MBN, and soil respiration were the highest during the rainy season and the lowest in summer, with the minimum values in the soil near coal mines. A soil quality index revealed a significant effect of heavy metal content on soil biological properties in the coal mining areas.

关键词： heavy metal microbial biomass mining area soil property soil quality index soil respiration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of elevated [CO_2] and nutrient management on wet and dry season rice production in subtropical India

引用

The Crop Journal 2015年第6期3卷 468-480页

作者： Sushree Sagarika Satapathy Dillip Kumar Swain Surendranath Pasupalak Pratap bhanu Singh Bhadoria Agricultural and Food Engineering Department Indian Institute of Technology Kharagpur Orissa University of Agriculture and Technology

The present experiment was conducted to evaluate the effect of elevated [CO_2] with varying nutrient management on rice–rice production system. The experiment was conducted in the open field and inside open-top chambers(OTCs) of ambient [CO_2](≈ 390 μmol L-1) and elevated [CO_2] environment(25% above ambient) during wet and dry seasons in 2011–2013at Kharagpur, India. The nutrient management included recommended doses of N, P, and K as chemical fertilizer(CF), integration of chemical and organic sources, and application of increased(25% higher) doses of CF. The higher [CO_2] level in the OTC increased aboveground biomass but marginally decreased filled grains per panicle and grain yield of rice, compared to the ambient environment. However, crop root biomass was increased significantly under elevated [CO_2]. With respect to nutrient management, increasing the dose of CF increased grain yield significantly in both seasons. At the recommended dose of nutrients, integrated nutrient management was comparable to CF in the wet season, but significantly inferior in the dry season, in its effect on growth and yield of rice. The [CO_2] elevation in OTC led to a marginal increase in organic C and available P content of soil, but a decrease in available N content. It was concluded that increased doses of nutrients via integration of chemical and organic sources in the wet season and chemical sources alone in the dry season will minimize the adverse effect of future climate on rice production in subtropical India.

关键词： Climate change Nutrient management Elevated [CO2] Rice yield Soil fertility

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A study on textural characteristics,heavy mineral distribution and grain-microtextures of recent sediment in the coastal area between the Sarada and Gosthani rivers,east coast of India

引用

International Journal of Sediment Research 2020年第5期35卷 484-503页

作者： Ali Mohammad Parvathaneni bhanu Murthy Edupuganti Naga Dhanamjaya Rao Hari Prasad Department of Geology Andhra University

The current study aimed to describe textural characteristics,heavy mineral composition,and grain microtextures of the sediment from three micro-environments(foreshore,berm,and dune).A total of forty-one(41) representative surficial sediment samples have been collected from fifteen(15) locations along the beach area between the Sarada and Gosthani rivers on the east coast of India,where the length of the stretch is more than 100 *** study reveals that most of the coastal sediment is medium to fine sand with relatively high ratios of coarse sand at Yarada beach,and the nature of the sediment is moderately to well *** characteristics indicate a high energy *** heavy mineral analysis of the sediment in the current study was done for coarse(+60#) and fine(+230#) size *** the weight percentage(WT%) reveals that a high percentage of heavy minerals is associated with fine ***,sillimanite,garnet,zircon,and rutile are the major heavy minerals identified in the current *** concentrations of these heavy minerals show great variations from south to north of the study *** an economic point of view,a considerable amount of heavy minerals(average 48.41%) are present on both sides(north and south) of the Gosthani River *** the Sarada Estuary,the concentration of the economic heavy minerals was found under the minimum economic *** grain microtextures of the major heavy minerals from the different locations along the study area demonstrate the variation in grain microtextures,which is controlled by the chemical and mechanical *** microtextures reflect moderate to high wave energy on the beach area,in addition to high mechanical impact on the grains from the estuary point.

关键词： Textural characteristics Heavy minerals Grain microtexture Coastal sediment Visakhapatnam Coast

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Re-estimation and comparisons of alternative accounting based bankruptcy prediction models for Indian companies

引用

Financial Innovation 2016年第1期2卷 59-86页

作者： bhanu Pratap Singh Alok Kumar Mishra School of Economics University of HyderabadProf.C.R.Rao RoadGachibowliHyderabad-500046 TelanganaIndia

Background:The suitability and performance of the bankruptcy prediction models is an empirical *** aim of this paper is to develop a bankruptcy prediction model for Indian manufacturing companies on a sample of 208 companies consisting of an equal number of defaulted and non-defaulted *** of 208 companies,130 are used for estimation sample,and 78 are holdout for model *** study reestimates the accounting based models such as Altman EI(Journal of Finance 23:19189-209,1968)Z-Score,Ohlson JA(Journal of Accounting Research 18:109-131,1980)Y-Score and Zmijewski ME(Journal of Accounting Research 22:59-82,1984)X-Score *** paper compares original and re-estimated models to explore the sensitivity of these models towards the change in time periods and financial ***:Multiple Discriminant Analysis(MDA)and Probit techniques are employed in the estimation of Z-Score and X-Score models,whereas Logit technique is employed in the estimation of Y-Score and the newly proposed *** performance of all the original,re-estimated and new proposed models are assessed by predictive accuracy,significance of parameters,long-range accuracy,secondary sample and Receiver Operating Characteristic(ROC)***:The major findings of the study reveal that the overall predictive accuracy of all the three models improves on estimation and holdout sample when the coefficients are *** the contesting models,the new bankruptcy prediction model outperforms other ***:The industry specific model should be developed with the new combinations of financial ratios to predict bankruptcy of the firms in a particular *** study further suggests the coefficients of the models are sensitive to time periods and financial ***,researchers should be cautioned while choosing the models for bankruptcy prediction to recalculate the models by looking at the recent data in order to get higher predictive accuracy.

关键词： Bankruptcy prediction Indian manufacturing companies MDA Logit Probit Unstable coefficient Predictive accuracy Receiver operating characteristic Long range accuracy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Intelligent Tunicate Swarm-Optimization-Algorithm-Based Lightweight Security Mechanism in Internet of Health Things

引用

Computers, Materials & Continua 2021年第1期66卷 551-562页

作者： Gia Nhu Nguyen Nin Ho Le Viet Gyanendra Prasad Joshi bhanu shr.stha Faculty of Information Technology Duy Tan UniversityDa Nang550000Vietnam Graduate School Duy Tan UniversityDa Nang550000Vietnam Department of Computer Science and Engineering Sejong UniversitySeoul05006South Korea Department of Electronic Engineering Kwangwoon UniversitySeoul01897South Korea

Fog computing in the Internet of Health Things(IoHT)is promising owing to the increasing need for energy-and latency-optimized health sector ***,clinical data(particularly,medical image data)are a delicate,highly protected resource that should be utilized in an effective and responsible manner to fulfil consumer ***,we propose an energy-efficient fog-based IoHT with a tunicate swarm-optimization-(TSO)-based lightweight Simon cipher to enhance the energy efficiency at the fog layer and the security of data stored at the cloud *** proposed Simon cipher uses the TSO algorithm to select the optimal keys that will minimize the deterioration of quality between the original and reconstructed(decrypted)*** this study,the decrypted image quality is preserved by the peak signal-to-noise ratio(PSNR)such that consumers can generate precise medical reports from IoHT devices at the application ***,a lightweight encryption step is implemented in the fog to improve energy efficiency and reduce additional computations at the cloud *** results indicate that the TSO-Simon model achieved a high PSNR of 61.37 dB and a pixel change rate of 95.31.

关键词： Internet of Health Things healthcare Simon cipher tunicate swarm optimization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of Pressure and Temperature on Phase Transformation and Properties of Titanium Aluminide Obtained through Reaction Synthesis

引用

Journal of Materials Science & Technology 2010年第8期26卷 693-704页

作者： R.K.Gupta bhanu Pant Vijaya Agarwala R.C.Agarwala P.P.Sinha Vikram Sarabhai Space Centre ISROTrivandrum-695 022India Indian Institute of Technology Roorkee

Reaction synthesis process has been used to develop γ titanium aluminide using elemental powders. Powder mixture of Ti-48 at. pct AI was prepared in ball mill and reaction synthesis was carried out in hot press with varying temperature and pressure. Titanium aluminide synthesized under high pressure and temperature resulted in better properties with respect to densification, homogenization response, mechanical properties and oxidation resistance as compared to that synthesized under low pressure and temperature. AI rich phases were observed in as-synthesized condition in all the experiments. However, some Ti rich phases were also found in high pressure-temperature synthesized samples. Density, hardness and tensile strength have been correlated with applied pressure through empirical relations. Variation in density with pressure is found to be logarithmic whereas hardness and tensile strength variation with pressure is polynomial.

关键词： Titanium aluminide Reaction synthesis Phase transformation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Achieving higher strength in Cu–Ag–Zr alloy by warm/hot rolling

引用

Rare Metals 2017年第4期36卷 263-267页

作者： S. Chenna Krishna Abhay K. Jha bhanu Pant Koshy M. George Materials and Mechanical Entity Vikram Sarabhai Space Centre Trivandrum 695022 India

High-strength Cu-3Ag-0.5Zr alloy plates were produced by multi-pass rolling in the temperature range of 500-800 ℃. An increase in strength was observed by rolling in the aforementioned range without significant loss in ductility. All the rolled samples show higher strength than solution-treated and aged samples. The maximum strength was observed for plates rolled at 500 ℃ with a yield strength and ultimate tensile strength of 311 and 385 MPa, respectively, and retaining a ductility of 23 %. Transmission electron microscopy （TEM） studies showed uniform distribution of fine silver precipitates and high dislocation density in the rolled samples. Nevertheless, the size of precipitates and dislocation density varied with the rolling temperature. The superior strength achieved in the rolled samples is attributed to grain refinement, dislocation strengthening, and precipitation hardening. This method can be employed to produce high-strength plates of pre- cipitation hardenable copper alloys.

关键词： Warm/hot rolling Higher strength Copperalloy Strengthening

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Seasonal variations and health risk assessment of trace elements in the Badigad River,lesser Himalayas,Nepal

引用

Acta Geochimica 2023年第4期42卷 689-703页

作者： Ramesh Raj Pant Kiran Bishwakarma Kshitiz Kandel Sudip Poudel Jharana Nepal bhanu Bhakta Neupane Virendra Bahadur Singh Central Department of Environmental Science Institute of Science and TechnologyTribhuvan UniversityKathmanduNepal University of Chinese Academy of Sciences Beijing 100049China Institute of Tibetan Plateau Research Chinese Academy of SciencesBeijing 100101China Central Department of Chemistry Institute of Science and TechnologyTribhuvan UniversityKathmanduNepal Department of Environmental Studies Ram Lal Anand CollegeUniversity of DelhiNew Delhi 110021India

The consumption of contaminated river water can have severe effects on human *** study aims to investigate the trace elements(TEs)content and their health risk assessment in the Badigad River Basin in the lesser Himalayas of *** total,44 water samples were collected from 22 different sites during the pre-monsoon and monsoon seasons,and 25 TEs were *** matrix and principal component analysis(PCA)were used to analyze the potential relationship between the measured TEs and their source ***,the water quality index(WQI),metal index(MI),and cancer index(CI)were *** TEs content in all samples were found to be within the WHO recommended guideline for drinking and domestic *** dominancy order of the TEs was observed as Sr>Ba>Li>Rb>Zn>Cr>Sc>Mn>Ti>Cu>As>Ni>Co>U>V>Pb>Cs>Ga>Y>Tl>Th>Zr>Bi>Cd>*** PCA analysis suggested that TEs could have natural,anthropogenic,and mixed *** WQI indicated that the river water is safe from a human health *** MI suggested that Badigad River can be considered safer for drinking purposes,and the cancer index(CI)showed that all the reported TEs are at low-risk *** findings of this study could be useful for government agencies in developing more sustainable water management policies in the ***,it is suggested that further investigations should be conducted in terms of other hydrogeochemical variables,including major ions,at spatiotemporal levels for the sustainability of the river basin.

关键词： Trace elements Water quality Health risk assessment Multivariate analysis Badigad River

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：