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Decoding Subsurface Secondary Mineralisation and its Impact on Cohesive Strength:An Outcome of the Deep Scientific Drilling Program in the Koyna-Warna Seismogenic Region,Western India

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Acta Geologica Sinica(English Edition) 2024年第S1期98卷 44-50页

作者： Halder PIYAL Sharma ANUPAM kumar Shukla MATSYENDRA kumar kamlesh Birbal Sahni Institute of Palaeosciences(DST Govt.of India)LucknowU.P.India Academy of Scientific and Innovative Research(AcSIR) Ghaziabad-201002India Government of India Ministry of Earth SciencesBorehole Geophysics Research LaboratoryKaradMaharashtraIndia

The Koyna-Warna seismogenic region overlying the Deccan volcanic province of Western India has been experiencing the recurrence of earthquakes since 1967 soon after the impoundment of the Koyna Dam.A large number of small to medium-magnitude shallow focus earthquakes(>100,000)have been detected in this intraplate region during the last six *** the present study,the core samples recovered from the borehole‘KBH3’drilled upto 1134 m depth in the pre-Deccan granitoids basement rocks of this region have been subjected to mineralogical and geochemical studies.

关键词： fluid-rock interaction faults chlorite hydrothermal alteration recurring seismicity

Mineralogical and Geochemical Evidence of Fluid-rock Interaction at the Shallow Crustal Level in Koyna Seismogenic Region, Maharashtra, India: Impact and Implications

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Acta Geologica Sinica(English Edition) 2021年第S1期95卷 40-43页

作者： Halder PIYAL kumar Shukla MATSYENDRA kumar kamlesh Sharma ANUPAM Birbal Sahni Institute of Palaeosciences(DST Govt.of India)LucknowU.P.India Govt.of India Ministry of Earth SciencesBorehole Geophysics Research LaboratoryKaradMaharashtraIndia

The Koyna region of Maharashtra located in the western part of the~65 Myr old Deccan traps province,overlying the Neoarchean cratonic granitoid basement of peninsular India,has been experiencing recurring seismicity s... 详细信息

关键词： Continental Deep Drilling Programme artificial reservoir triggered seismicity fluid-rock interaction shallow crustal level geophysical anomaly clay mineral hydrothermal alteration

Palaeodiet of Miocene Producers and Depositional Environments:Inferences from the First Evidence of Microcoprolites from India

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Acta Geologica Sinica(English Edition) 2020年第5期94卷 1574-1590页

作者： Vivesh VKAPUR kamlesh kumar P.MORTHEKAI Amritpal Singh CHADDHA Birbal Sahni Institute of Palaeosciences 53University RoadLucknowUttar Pradesh 226007India

This paper reviews research on coprolites from India,providing the first evidence of microcoprolites from the early Miocene(Aquitanian)Khari Nadi Formation sedimentary succession,exposed about 1.5 km northeast of the village of Kotada,Kachchh(Kutch)District,Gujarat State,western *** and size comparisons(in a statistical framework)with known coprolites from the Mesozoic-Cenozoic successions of India(including those recorded herein)and globally suggest that fishes were the likely producers of the Kotada *** electron microscopy confirms the presence of fish dental remains within the coprolites,while both Scanning Electron Microscopy(SEM)and Energy Dispersive X-ray Spectroscopy(EDS)reveal the phosphatic nature of the microscopic coprolite specimens(recorded herein)hinting that the producer(s)were predominantly carnivorous(ichthyophagous)in their ***,X-Ray Fluorescence(XRF)analysis of the host and associated lithologies allows us to deduce that the Kotada coprolites were deposited in a shallow marine environment,with possible aerial exposure of the host lithology occurring at some point after *** the best of our knowledge,the present report is the first record of microscopic fish coprolites from India,as well as being the first from the Aquitanian of India and the oldest Neogene record from India.

关键词： coprolites palaeodiet palaeoenvironment Energy Dispersive Spectroscopy(EDS) X-Ray Fluorescence(XRF)analysis Miocene(Aquitanian)

减少热输入对TIG自熔焊Ti-6Al-4V合金的影响

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Transactions of Nonferrous Metals Society of China 2023年第12期33卷 3712-3724页

作者： kamlesh kumar Manoj MASANTA Department of Mechanical Engineering National Institute of Technology RourkelaRourkela 769008India

采用带有气体保护装置的TIG自熔焊技术以对接接头结构形式焊接厚度为3 mm的Ti-6Al-4V合金板。在适当热输入条件下获得完全熔透的焊接接头后,结合较高焊接电流和扫描速度以减少热输入开展后续实验。对不同热输入条件下获得的焊接接头进... 详细信息

采用带有气体保护装置的TIG自熔焊技术以对接接头结构形式焊接厚度为3 mm的Ti-6Al-4V合金板。在适当热输入条件下获得完全熔透的焊接接头后,结合较高焊接电流和扫描速度以减少热输入开展后续实验。对不同热输入条件下获得的焊接接头进行深入的显微组织分析。结果表明,显微硬度、拉伸强度和断裂强度之间存在强相关性。采用较低的热输入可以显著提高焊接接头的力学性能。这是由于在较低热输入条件下,热输入的变化导致初生α相、初生β相和马氏体α相发生改变,从而改善了焊接接头的力学性能。随着热输入从0.406 k J/mm降低到0.232k J/mm,焊接接头的拉伸强度和断裂强度分别从1020和1015 MPa增加到1070和1950MPa。在最小热输入(0.232k J/mm)的情况下,接头的拉伸强度达到基材的98%。实验结果证明在低热输入条件下TIG焊焊接Ti-6Al-4V合金的潜力。

关键词： TIG焊 Ti-6Al-4V合金热输入拉伸强度显微组织

Optimizing Optical Fiber Faults Detection:A Comparative Analysis of Advanced Machine Learning Approaches

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Computers, Materials & Continua 2024年第5期79卷 2697-2721页

作者： kamlesh kumar Soothar Yuanxiang Chen Arif Hussain Magsi Cong Hu Hussain Shah School of Electronics Engineering Beijing University of Posts and TelecommunicationsBeijing100876China State Key Laboratory of Integrated Services Networks Xidian UniversityXi’an710071China State Key Laboratory ofNetworking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing100876China

Efficient optical network management poses significant importance in backhaul and access network communicationfor preventing service disruptions and ensuring Quality of Service(QoS)*** emerging faultsin optical networks introduce challenges that can jeopardize the network with a variety of *** existingliterature witnessed various partial or inadequate *** the other hand,Machine Learning(ML)hasrevolutionized as a promising technique for fault detection and *** traditional fault managementsystems,this research has three-fold ***,this research leverages the ML and Deep Learning(DL)multi-classification system and evaluates their accuracy in detecting six distinct fault types,including fiber cut,fibereavesdropping,splicing,bad connector,bending,and PC ***,this paper assesses the classificationdelay of each classification ***,this work proposes a fiber optics fault prevention algorithm thatdetermines to mitigate the faults *** work utilized a publicly available fiber optics dataset namedOTDR_Data and applied different ML classifiers,such as Gaussian Naive Bayes(GNB),Logistic Regression(LR),Support Vector Machine(SVM),K-Nearest Neighbor(KNN),Random Forest(RF),and Decision Tree(DT).Moreover,Ensemble Learning(EL)techniques are applied to evaluate the accuracy of various *** addition,this work evaluated the performance of DL-based Convolutional Neural Network and Long-Short Term Memory(CNN-LSTM)hybrid *** findings reveal that the CNN-LSTM hybrid technique achieved the highestaccuracy of 99%with a delay of 360 *** the other hand,EL techniques improved the accuracy in detecting fiberoptic ***,this research comprehensively assesses accuracy and delay metrics for various classifiers andproposes the most efficient attack detection system in fiber optics.

关键词： Fiber optics fault detection multiclassification machine learning ensemble learning

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工业负荷可持续并网太阳能光伏的可行性评价

Journal of Central South University 2023年第11期30卷 3575-3585页

作者： kamlesh kumar Amir Mahmood SOOMRO Mahesh kumar Laveet kumar Müslüm ARICI Department of Electrical Engineering Mehran University of Engineering and TechnologyJamshoro76062SindhPakistan Department of Mechanical&Industrial Engineering College of EngineeringQatar UniversityDohaQatar Mechanical Engineering Department Engineering FacultyKocaeli University41001 KocaeliTurkey

可再生能源发电因其间歇性而具有多变性,对发展中国家来说,可再生能源发电的成本很高。由于电价定价和机制设计不合理,上网电价和净计量等支持性政策和方案对消费者也没有太大吸引力。屋顶太阳能光伏系统自用技术可以避免这些方案的缺点... 详细信息

可再生能源发电因其间歇性而具有多变性,对发展中国家来说,可再生能源发电的成本很高。由于电价定价和机制设计不合理,上网电价和净计量等支持性政策和方案对消费者也没有太大吸引力。屋顶太阳能光伏系统自用技术可以避免这些方案的缺点,因为这种技术比公用电网的发电成本更低。因此,产消者可以以最低价格使用大部分电力,更具吸引力。本文分析了并网工业太阳能光伏发电系统的成本和可行性。结果发现,基于储能并网的光伏系统成本为0.0086$/(kW·h),公用电网将以0.062$/(kW·h)的价格出售给产消者,与使用时间评级模型相比,年能源成本将降低35.23%。此外,所提出的方案可满足96%的年能源需求,保证了供应的安全性,所提出的模型可用于其他发展中国家。

关键词：自用消费自给自足净计量进料关税网格存储光伏系统

Oldest Asian Record of Snapping Shrimps(Malacostraca:Alpheidae)from the Kutch Basin,Western India and Associated Biota:Biostratigraphic,Paleoenvironmental and Paleoecological Significance

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Acta Geologica Sinica(English Edition) 2022年第6期96卷 1867-1883页

作者： Vivesh V.KAPUR kamlesh kumar Pranav J.PANDYA Amit KGHOSH Arindam CHAKRABORTY Anupam SHARMA Gaurav CHAUHAN M.G.THAKKAR Birbal Sahni Institute of Palaeosciences 53University RoadLucknow 226007India Department of Biology Shri R.R.Lalan CollegeBhujKachchh DistrictGujaratIndia Institute of Earth Sciences Academia SinicaTaipeiTaiwan 11529China Department of Earth and Environmental Science K.S.K.V.Kachchh UniversityBhujKachchh DistrictGujaratIndia

The oldest Asian record of alpheid shrimps,assigned to genus Alpheus,based on snapping claw fingertips from the Miocene Khari Nadi Formation in the Kutch Basin,western India reported herein,extends the fossil record of the family Alpheidae from Asia by~22 million *** early Miocene(Aquitanian)age is estimated based on the associated assemblage of calcareous nannofossils,Sphenolithus disbelemnos,Cyclicargolithus floridanus,and Reticulofenestra *** co-occurring microbiota includes bony fish otolith remains,identified as“genus Gobiidarum”,isolated teeth of Dasyatis rays,Sphyrna sharks,and teleosts,ctenoid and placoid scales,ostracods,belonging to the genera Paractinocythereis,Alocopocythere,Ruggieria,Aglaiocypris,Bairdoppilata,and echinoid *** together,the microfossil assemblage and data from chemical analyses using Energy Dispersive Spectroscopy,X-Ray Diffraction and Wavelength Dispersive X-Ray Fluorescence of host and associated lithologies suggests prevalence of a shallow(neritic)to coastal marine(intertidal)depositional *** present investigation also provides the oldest fossil evidence on the co-occurrence of Alpheus and gobiids(based on otoliths)that strongly advocates that the mutualistic association between these animal groups had developed by the Aquitanian.

关键词： biostratigraphy Crustacea Caridea Elasmobranchs Gobiidae invertebrate and vertebrate paleontology nannofossils Oligocene-Miocene Indian subcontinent

Studies on Trans-Generational Transcriptional Silencing of <i>cry</i>1<i>Ac</i>Gene in Tobacco Transgenics

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American Journal of Molecular Biology 2017年第1期7卷 1-10页

作者： Madhurima Kahali kamlesh kumar Soni Pradeep kumar Burma Department of Genetics University of Delhi South Campus New Delhi India

Developing transgenics that express high levels of Cry1Ac protein, and at the same time, are phenotypically normal, has not been an easy task to achieve. It has been routinely observed that most of the transgenic plants that survive, show no or extremely low levels of Cry1Ac protein. However, all of these plants do express the selectable marker, nptII gene. In the present study, we record an interesting observation of how one of the genes (cry1Ac) on a single T-DNA fragment is selectively silenced, keeping the expression of the other gene (nptII) intact. Further, this silenced state is inherited.

关键词： Cry1Ac Transcriptional Silencing Bt Crops Gene Silencing

低复杂度大规模MIMO信号检测技术的研究与设计

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低复杂度大规模MIMO信号检测技术的研究与设计

作者： kumar kamlesh 北京邮电大学

学位级别：硕士

大规模多输入多输出（MIMO）系统因具有比传统小规模的MIMO系统更高的可靠性和频谱效率而正在快速发展。该系统的主要目的是在相同频带上同时在数以百计的基站天线和用户天线间建立连接。然而大规模MIMO系统在实际应用中往往会面临许多... 详细信息

大规模多输入多输出（MIMO）系统因具有比传统小规模的MIMO系统更高的可靠性和频谱效率而正在快速发展。该系统的主要目的是在相同频带上同时在数以百计的基站天线和用户天线间建立连接。然而大规模MIMO系统在实际应用中往往会面临许多挑战,其中一个主要挑战是由于天线数目庞大而导致的接收端信号检测难的问题。线性检测（即迫零和线性最小均方误差（LMMSE）算法）被认为能够达到接近最优的信号检测性能,但对于大规模天线系统却并不适用。由于包含高阶矩阵的求逆运算,线性检测方法的计算复杂度随着天线数目的增加而快速升高。为了避免大型矩阵的求逆运算,人们将基于迭代的信号检测技术应用到MIMO系统中,但该技术仍需要提升性能和具体实现才能应用于大规模MIMO系统中。本文提出了一种M-MIMO信号技术,它能够避免大型矩阵的求逆运算,并应用到非常大规模的天线系统中。本文提出的技术基于Jacobi和Richardson方法,具有更低计算复杂度和更高信号检测精度的优势。本方法的初始解是天线相关的,这比零初始解要更高效,性能也更好,而且本方法使用近似特征值来计算松弛参数,从而提高了收敛速度。所提出方法在较低的基站用户天线比（BUAR）的情况下展现出了出色的性能。本文用误符号率（SER）来比较不同的BUAR值下的系统性能。结果表明,系统精度随着迭代次数的增加而提高,而且尽管在较小BUAR值下误符号率上升,但本方法展示出了更优的性能,更接近最优的线性最小均方误差方法。

关键词：信号检测基站用户天线比(BUAR) 大规模多输入多输出(MIMO) 线性最小均方误差(LMMSE) 低复杂度