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扭带式换热器水热关联的机器学习辅助建模

Acta Mechanica Sinica 2023年第1期39卷 148-157页

作者： Jyoti Prakash Panda bipin kumar Anil kumar Patil Manoj kumar Ravi kumar Department of Mechanical Engineering DIT UniversityDehradunUttarakhandIndia

本文介绍了机器学习(ML)算法在带扭带插件的换热器传热关联(如努塞尔数和摩擦系数)建模中的应用.采用换热器在不同雷诺数(Re)、扭转比(t)、穿孔率(p)和不同扭带数(n)下的实验数据进行相关建模.在数据驱动的代理建模中使用了三种机器学... 详细信息

本文介绍了机器学习(ML)算法在带扭带插件的换热器传热关联(如努塞尔数和摩擦系数)建模中的应用.采用换热器在不同雷诺数(Re)、扭转比(t)、穿孔率(p)和不同扭带数(n)下的实验数据进行相关建模.在数据驱动的代理建模中使用了三种机器学习算法:多项式回归(PR)、随机森林(RF)和人工神经网络(ANN).为了保证模型的通用性,对ML模型的超参数进行了优化,分析了不同ML算法的性能参数(如R 2和MAE).结果表明,在不同的测试数据集上,人工神经网络对传热系数的预测优于PR和RF的预测.基于本文分析内容,对未来数据驱动的传热关联建模工作和类似研究提出了建议.

关键词：机器学习数据驱动测试数据集辅助建模多项式回归超参数穿孔率

喷雾热解法制备高产率石墨／炭纳米纤维及其特征研究

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新型炭材料 2008年第2期23卷 116-120页

作者： bipin kumar Gupta O. N. Srivastava National Physical Laboratory Dr. K.S. Krishnan Road New Delhi 110012 India Department of Physics Banaras Hindu University Varanasi-221005 India

基于石墨／炭纳米纤维（GNFs）的克量级（〉1g）制备及其特征表征，通过苯的喷雾热解制备了GNFs，并采用XRD，TEM及SEM对GNFs进行了表征。结果表明：高产率GNFs的最佳生长条件是：喷管内径～0．52mm，苯液流量～5mL／min，反应温度-750... 详细信息

基于石墨／炭纳米纤维（GNFs）的克量级（〉1g）制备及其特征表征，通过苯的喷雾热解制备了GNFs，并采用XRD，TEM及SEM对GNFs进行了表征。结果表明：高产率GNFs的最佳生长条件是：喷管内径～0．52mm，苯液流量～5mL／min，反应温度-750℃，载气H2流量-1500mL／min。所制GNFs的典型长度和直径分别为～60μm和-250nm，大部分GNFs样品呈现螺圈／螺旋纤维状。喷雾热解生长模式中GNFs的产率为克量级（1．45g）／产程。

关键词：炭纳米纤维石墨碳 XRD TEM SEM

Satellite Image-based Monitoring of Urban Land Use Change and Assessing the Driving Factors in Pokhara and Bharatpur Metropolitan Cities, Gandaki Basin, Nepal

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Journal of Resources and Ecology 2020年第1期11卷 87-99页

作者： Raju RAI ZHANG Yili Basanta PAUDEL Narendra Raj KHANAL bipin kumar ACHARYA Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Sciences Beijing 100101China Kathmandu Center for Research and Education Chinese Academy of Sciences-Tribhuvan UniversityKirtipurKathmandu 44613Nepal Department of Epidemiology School of Public HealthSun Yat-Sen UniversityGuangzhou 510275China

Urban growth is a key indicator of economic *** the same time,haphazard urban growth creates serious socioeconomic,environmental and urban land management *** this context,understanding the process of urban landscape change is important for guiding the sustainable growth of urban *** study analyzes the urban land changes during 1990–2018 in two metropolitan cities of Gandaki basin:Pokhara and *** satellite images were analyzed using supervised classification *** results revealed that the built-up area has increased significantly by 300%in Pokhara and by nearly 500%in the Bharatpur during the past 28 *** growth,migration from surrounding areas due to urban facilities and the easy lifestyle in cities were found to be major determinants of urban growth within the study *** addition,the changing urban definition and expansion of municipal boundaries are key factors for rapid urban *** cities are likely to grow in the future as they are both located in areas that encompass the high levels of commercial activity and modern service *** haphazard urban growth should be minimized through planning and policies for sustainable urban development.

关键词： urban land change driving factors Pokhara Bharatpur Gandaki River Basin

Ground bounce noise reduction aware combinational multi threshold CMOS circuits for nanoscale CMOS multiplier

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Frontiers of Optoelectronics 2013年第3期6卷 327-337页

作者： bipin kumar VERMA Shyam Babu SINGH Shyam AKASHE Department of Electronics and Communication Engineering ITM University Gwalior (M.P.) 474001 India

Multi-threshold complementary metal-oxide- semiconductor （MTCMOS） is ofbn used to reduce the leakage current in idle circuit. Ground bounce noise produced during a transition mode （sleep-to-active） is an important challenge in MTCMOS. In this paper, various noise-aware combinational MTCMOS circuit was used to evaluate the ground bounce noise. An intermediate mode was applied in the sleep-to-active mode transition to reduce the charge stored on virtual lines to real ground. The dependence of ground bounce noise on voltage, transistor size and temperature was investigated with different MTCMOS circuit technique. The peak amplitude of ground bounce noise was reduced up to 78.82%. The leakage current of the circuit was decreased up to 99.73% and the active power of the circuit was reduced up to 62.32%. Simulation of multiplier with different MTCMOS circuit techniques was performed on 45nm CMOS technology.

关键词： multi-threshold complementary metal-oxide-semiconductor (MTCMOS) mode transition groundbounce noise sleep transistor

Silver Inhibits the Biofilm Formation of <i>Pseudomonas aeruginosa</i>

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Advances in Microbiology 2015年第10期5卷 677-685页

作者： bipin kumar Sharma Animesh Saha Lovely Rahaman Surajit Bhattacharjee Prosun Tribedi Department of Microbiology Tripura University Suryamaninagar Tripura India Department of Molecular Biology and Bioinformatics Tripura University Suryamaninagar Tripura India

Biofilm is the assemblage of microbial cells that are irreversibly associated with biotic and abiotic surfaces and is usually enclosed in the self secreted extracellular polymeric substances (EPS). The presence of EPS in biofilm makes the microbial population resistance against antibiotics and other drugs. Biofilms are considered as a serious challenge to pharmaceutical industries because most of the microbial diseases are now associated with biofilm. In this context, we have addressed the biofilm potentialities of Pseudomonas aeruginosa, which has been found to be associated with several deadly diseases including septicemia, urinary tract infections, and gastrointestinal infections, and wherein biofilm plays a crucial role in pathogenesis. Since silver had been used globally for a long time for treating a wide range of illnesses from burn wounds, typhoid, and anthrax to bacterial conjunctivitis in newborns, but its antibiofilm activity is still unknown. Thus, in this current study, we have tried to examine the antibiofilm potentiality of silver against the biofilm of Pseudomonas aeruginosa. Our result showed that silver exhibited considerable antimicrobial property against Pseudomonas aeruginosa where the minimum inhibitory concentration (MIC) was found at 25 μg/ml. Biofilm inhibition by silver against Pseudomonas aeruginosa was then evaluated by crystal violet (CV) staining, estimation of total biofilm protein and microscopy based microbial adherence test using the sub MIC doses of silver. The results showed that all the tested sub MIC doses of silver exhibited considerable antibiofilm activity against P. aeruginosa, wherein the maximum biofilm attenuation was showed by a silver concentration of 20 μg/ml. We also observed that all these sub MIC doses of silver neither interfere with the growth cycle of the bacteria nor affect the cell viability but only attenuates biofilm formation property of the bacteria. The current study deciphers a new axis in biofilm biology

关键词： Pseudomonas Silver Antimicrobial Antibiofilm

Isolation and Partial Evaluation of a Potential Indigenous Yeast Strain <i>Pichia kudriavzevii</i>from a Traditional Rice Beer—“Gora” Prepared by the Koloi Tribes of Tripura

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Advances in Microbiology 2019年第9期9卷 824-841页

作者： Sushanta Ghosh Surajit De Mandal Nandita Nath David L. Kaipeng Lovely Rahaman Senthil kumar Nachimuthu bipin kumar Sharma Department of Microbiology Tripura University Suryamaninagar India Department of Biotechnology Mizoram University Aizawl India

As per tradition from hundreds of years the Koloi tribes of Tripura are preparing “Gora”-therice based fermented beer which is very good in taste and aroma applying their traditional indigenous brewing techniques. In this study, an attempt has been made to identify the indigenous yeast which is the main causative agent for fermentation and to investigate its fermentation ability with an industrial Saccharomyces cerevisiaes train. After investigation based on culture dependent phenotypic characteristics like-staining and biochemical characterization, primarily the responsible yeast species was determined as Pichia kudriavzevii and further confirmed followed by 18S rRNA ribotyping and the sequences was deposited at Gene bank and NCBI bearing specific accession number. In the comparative analysis, it has been found a significant similarities in all aspects of nutritional and alcohol percentages with the industrial strain in laboratory condition. The alcohol percentage in the rice beer “Gora” measured 6.40 ± 0.008% v/v. The study may be the first scientific investigation of its kind about this indigenous yeast strain isolated from “Gora” of this Indo-Burma biodiversity region and may provide sufficient background and potentiality for promoting these kinds of indigenous alcoholic beverages for small scale commercialization to strengthen the rural livelihood as well as to maintain immaterial cultural heritage.

关键词： Beer Yeast Fermentation 18S rRNA

Predicting the Impact of Climate Change on Vulnerable Species in Gandaki River Basin,Central Himalayas

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Journal of Resources and Ecology 2022年第2期13卷 173-185页

作者： Raju RAI ZHANG Yili LIU Linshan Paras Bikram SINGH Basanta PAUDEL bipin kumar ACHARYA Narendra Raj KHANAL Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Kathmandu Center for Research and Education Chinese Academy of Sciences-Tribhuvan UniversityKathmandu 44613Nepal Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of ScienceGuangzhou 510260China Biodiversity Conservation Society Nepal Lalitpur 44700Nepal Department of Epidemiology School of Public HealthSun Yat-Sen UniversityGuangzhou 510275China

Gandaki River Basin(GRB)is an important part of the central Himalayan region,which provides habitat for numerous wild ***,climatic changes are making the habitat in this basin more *** paper aims to assess the potential impacts of climate change on the spatial distributions of habitat changes for two vulnerable species,Himalayan black bear(Ursus thibetanus laniger)and common leopard(Panthera pardus fusca),using the maximum entropy(Max Ent)species distribution *** occurrence locations were used along with several bioclimatic and topographic variables(elevation,slope and aspect)to fit the model and predict the potential distributions(current and future)of the *** results show that the highly suitable area of Himalayan black bear within the GRB currently encompasses around 1642 km^(2)(5.01%area of the basin),which is predicted to increase by 51 km^(2) in the future(2050).Similarly,the habitat of common leopard is estimated as 3999 km^(2)(12.19%of the GRB area),which is likely to increase to 4806 km^(2) in ***,the habitat of Himalayan black bear is predicted to increase in the eastern part(Baseri,Tatopani and north from Bhainse)and to decrease in the eastern(Somdang,Chhekampar),western(Burtibang and Bobang)and northern(Sangboche,Manang,Chhekampar)parts of the study ***,the habitat of common leopard is projected to decrease particularly in the eastern,western and southern parts of the basin,although it is estimated to be extended in the southeastern(Bhainse),western(Harichaur and northern Sandhikhark)and north-western(Sangboche)parts of the *** determine the habitat impact,the environmental variables such as elevation,Bio 15(precipitation seasonality)and Bio 16(precipitation of wettest quarter)highly contribute to habitat change of Himalayan black bear;while Bio 13(precipitation of wettest month)and Bio 15 are the main contributors for common ***,this study predicted that the suitable habita

关键词： climate change habitat change Himalayan black bear(Ursus thibetanus laniger) common leopard(Panthera pardus fusca) Gandaki River Basin

基于CAMEL模型的尼泊尔银行和纳比尔银行的比较绩效分析

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价值工程 2019年第5期38卷 63-68页

作者： Prakash kumar bipin 孙雨晗武汉理工大学武汉430070

银行是被政府许可的一种金融机构。它接受公众存款,贷款给需要钱的民众、实业家或商户。它把分散在经济领域的资金融通到生产部门,从而促进经济的全面发展。分析银行业绩效很大程度上是检验宏观经济表现的一种有效的指标和措施。银行业... 详细信息

银行是被政府许可的一种金融机构。它接受公众存款,贷款给需要钱的民众、实业家或商户。它把分散在经济领域的资金融通到生产部门,从而促进经济的全面发展。分析银行业绩效很大程度上是检验宏观经济表现的一种有效的指标和措施。银行业的绩效表现被认为是经济活动的替代品,健全的银行系统是经济、社会和产业增长的基石。商业银行绩效评价研究常常和银行能够在多大程度上利用它的资产、股东权益和负债、收支等有关。因此许多研究人员、学者、政策制定者用CAMEL来对银行绩效进行评估。CAMEL是一种非常有用的、检验银行安全性和稳固性的分析工具,可能帮助减轻导致银行破产的潜在风险。

关键词：银行绩效 CAMEL模型比较分析

A rare case of quadrigeminal plate lipoma presenting with the sixth cranial nerve palsy

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Neuroimmunology and Neuroinflammation 2017年第11期4卷 232-235页

作者： bipin kumar Chaurasia Narendra ShaIike SiIak Ram Chaudhary ShamsuI AIam Dhiman Chowdhory KanakKanti Barua Ranjit kumar Chaurasiya Raushan kumar Chaurasia Ramesh kumar Chaurasia ToIga Dundar Department of Neurosurgery Bangabandhu Sheikh Mujib Medical UniversityShahbagDhaka1000Bangladesh Department of Emergency and Casualty Bhawani HospitalBirgunj44300Nepal Department of Nephrology Golden Hospital Pvt.Ltd.Hospital ChowkBiratnagar56613Nepal Department of Neurosurgery Bezmialem VakιfUniverstyItanbul34265Turkey

Intracranial lipomas are rare benign tumour that is slow growing, generally asymptomatic, most frequently located in the midline areas and are usually an incidental finding on imaging and therefore cases are not frequently reported. This study reports a case of a patient with quadrigeminal plate lipoma presenting with obstructive hydrocephalous and the 6th cranial nerve palsy that was successfully treated with ventriculo-peritoneal shunting without addressing the lesion.

关键词： Lipoma quadrigeminal plate the 6th cranial nerve palsy hydrocephalus