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Earthquake Engineering and Engineering Vibration 2024年第4期23卷 973-994页

作者： Barik, Jyoti Ranjan biswal, Kishore Chandra Department of Civil Engineering National Institute of Technology Rourkela India

The seismic behavior of a partially filled rigid rectangular liquid tank is investigated under short- and long-duration ground motions. A finite element model is developed to analyze the liquid domain by using four-noded quadrilateral elements. The competency of the model is verified with the available results. Parametric studies are conducted for the dynamic parameters of the base-isolated tank, using a lead rubber bearing to evaluate the optimum damping and time period of the isolator. The application of base isolation has reduced the total and impulsive hydrodynamic components of pressure by 80 to 90 percent, and base shear by 15 to 95 percent, depending upon the frequency content and duration of the considered earthquakes. The sloshing amplitude of the base-isolated tank is reduced by 18 to 94 percent for most of the short-duration earthquakes, while it is increased by 17 to 60 percent for the majority of the long-duration earthquakes. Furthermore, resonance studies are carried out through a long-duration harmonic excitation to obtain the dynamic behavior of non-isolated and isolated tanks, using a nonlinear sloshing model. The seismic responses of the base-isolated tank are obtained as higher when the excitation frequency matches the fundamental sloshing frequency rather than the isolator frequency.

关键词： lead rubber bearing frequency domain resonant inputs long-duration excitation

Seismic evaluation of frequency influence and resonant behavior for lead rubber bearing isolated rigid rectangular liquid tanks

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Earthquake Engineering and Engineering Vibration 2024年第04期 973-994页

作者： Jyoti Ranjan Barik Kishore Chandra biswal Department of Civil Engineering National Institute of Technology Rourkela

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Wavelet Synchro-squeezing Transform and Dynamic Threshold Supported Symmetrical Power Swing Technique for Modern Transmission Network

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Chinese Journal of Electrical Engineering 2024年第2期10卷 30-43页

作者： Monalisa biswal Kumar Raja Andanapalli Papia Ray Department of Electrical Engineering National Institute of Technology RaipurChhattisgarh 492010India Department of Electrical Engineering Veer Surendra Sai University of TechnologyBurla Sambalpur 768018India

Distance relays are prone to symmetrical power swing *** mitigate this issue,a dynamic threshold-supported algorithm is proposed.A single logic is not supposed to be secure for all ***,a supervisory algorithm,as proposed in this study,can aid in the improvement of the immunity of the relay during swing cases and be sensitive to symmetrical *** the developed stages,a three-phase power signal was used and processed in two different steps:(i)extraction of the effective intrinsic mode function(IMF)selected from the Kurtosis analysis using the wavelet synchro-squeezing transform,and(ii)estimation of the average Euclidean distance index using the absolute values of the decomposed IMF’*** adaptive threshold facilitated resistance to swing *** the onset of a symmetrical fault,the proposed algorithm efficiently discriminated among events using a dynamic *** IEEE 39-bus test system and Indian Eastern Power Grid networks were modelled using PSCAD software,and cases were generated to test the efficacy of the *** impact of the proposed method on a large-scale wind farm was also evaluated.A comparative analysis with other existing methods revealed the security and dependability of the proposed method.

关键词： Distance relays symmetrical power swing wind farm wavelet synchro-squeezing transform(WSST) Euclidean distance

Management of ruptured renal angiomyolipoma with bilateral staghorn calculi

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Asian Journal of Urology 2024年第3期11卷 509-510页

作者： Amit Sharma Deepak biswal Kishor Roy R.T.Raghavendra Department of Urology AIIMSRaipurCGIndia

Dear Editor,We present a case of ruptured renal angiomyolipoma(AML)and bilateral renal staghorn *** discuss about the management of this patient by angioembolization,partial nephrectomy,and pyelolithotomy,followed by contralateral interval percutaneous nephrolithotomy(PCNL).Our case is a 40-year-old male who presented with history of dull aching and dragging sensation in bilateral flanks of 6-month *** was admitted and evaluated at other hospital for dizziness,sweating,and loss of *** was found to have bilateral staghorn calculi and left AML and was referred to our institute for further management after initial *** proper written and informed consent was taken from the patient for management as well as publication of the report and images,maintaining the patient’s anonymity.

关键词： admitted sensation renal

Design and Numerical Investigation to Predict the FlowPattern of Non-axisymmetric Convergent Nozzle:AComponent of Turboexpander

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Journal of Traffic and Transportation Engineering 2019年第6期7卷 264-281页

作者： Manoj Kumar Debashis Panda rasmikanti biswal Suraj Kumar Behera Ranjit Kumar Sahoo Department of Mechanical Engineering NITRourkelaOdisha 769008India

Current work proposes a novel design methodology using curve-fitting approach for a non-axisymmetric airfoil convergent nozzle used in small-sized cryogenic *** curves used for designing the nozzle are based on a combination of fifth and third order curve at upper and lower surface *** different turbulence model such as k-ε,SST,BSL and SSG Reynolds stress turbulence model is used to visualize and compare the fluid flow characteristics and thermal behaviors at various *** is interesting to observe that the Mach number obtained at the outlet of the nozzle is highest and temperature drop is maximum for SSG model under similar boundary *** is also observed that the designed nozzle with curve fitting approach is appropriate for impulse type turbine with a small amount of *** key feature of this implementation is to obtain subsonic velocity at the nozzle exit and reduce the irreversible losses through the nozzle,which can affect the performance of a turboexpander.

关键词： Fluid flow pattern non-axisymmetric nozzle air CFD turboexpander.

Transcriptomic and Macroscopic Architectures of Multimodal Covariance Network Reveal Molecular–Structural–Functional Co-alterations

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Research 2024年第1期2023卷 471-487页

作者： Lin Jiang Yueheng Peng Runyang He Qingqing Yang Chanlin Yi Yuqin Li Bin Zhu Yajing Si Tao Zhang Bharat B.biswal Dezhong Yao Lan Xiong Fali Li Peng Xu The Clinical Hospital of Chengdu Brain Science Institute MOE Key Lab for NeuroinformationUniversity of Electronic Science and Technology of ChinaChengdu 611731China School of Life Science and Technology Center for Information in BioMedicineUniversity of Electronic Science and Technology of ChinaChengdu 611731China School of Psychology Xinxiang Medical UniversityXinxiang 453003China School of Science Xihua UniversityChengdu 610039China Department of Biomedical Engineering New Jersey Institute of TechnologyNewarkNJUSA School of Electrical Engineering Zhengzhou UniversityZhengzhou 450001China Research Unit of NeuroInformation Chinese Academy of Medical Sciences2019RU035ChengduChina Montreal Neurological Institute and Hospital McGill UniversityMontrealQCCanada Department of Electrical and Computer Engineering Faculty of Science and TechnologyUniversity of MacaoMacaoChina Radiation Oncology Key Laboratory of Sichuan Province 610041 ChengduChina Rehabilitation Center Qilu Hospital of Shandong UniversityJinan 250012China

Human cognition is usually underpinned by intrinsic structure and functional neural co-activation in spatially distributed brain *** to lacking an effective approach to quantifying the covarying of structure and functional responses,how the structural–functional circuits interact and how genes encode the relationships,to deepen our knowledge of human cognition and disease,are still ***,we propose a multimodal covariance network(MCN)construction approach to capture interregional covarying of the structural skeleton and transient functional activities for a single *** further explored the potential association between brain-wide gene expression patterns and structural–functional covarying in individuals involved in a gambling task and individuals with major depression disorder(MDD),adopting multimodal data from a publicly available human brain transcriptomic atlas and 2 independent *** analysis showed a replicable cortical structural–functional fine map in healthy individuals,and the expression of cognition-and disease phenotype-related genes was found to be spatially correlated with the corresponding MCN *** analysis of cell type-specific signature genes suggests that the excitatory and inhibitory neuron transcriptomic changes could account for most of the observed correlation with task-evoked MCN differences.

关键词： alterations evoked spatially

A numerical study of violent sloshing problems with modified MPS method

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Journal of Hydrodynamics 2017年第4期29卷 659-667页

作者： Debadatta Jena Kishore Chandra biswal Department of Civil Engineering National Institute of Technology

A numerical study on violent liquid sloshing phenomenon in a partially filled rectangular container is carried out by using moving particle semi-implicit（MPS） method. The present study deals with the implementation of five modifications all together over the original MPS method. The modifications include improved source terms for pressure Poisson equation, special approximation technique for the representation of gradient differential operator, collective action of mixed free surface particle identification boundary conditions, effecting Neumann boundary condition on solving the PPE and fixing judiciously the parting distance among particles to prevent collision. The suitability of the kernel function used in the original MPS method along with these five modifications is investigated for violent sloshing problems. The present model ensures a good agreement between numerical results with the existing experimental observations. The model is successfully applied to a partially filled tank undergoing horizontal sinusoidal excitation to compute the sloshing wave amplitudes and pressure on tank walls. The assessment of dynamic behaviour manifested in terms of base shear, overturning moment and impact pressure load exerted on tank ceiling induced by violent sloshing motion using MPS method is not reported in the open literature and has been efficiently carried out in the present study.

关键词： Sloshing particle method impact pressure base shear overturning moment

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A shake table investigation of dynamic behavior of pile supported bridges in liquefiable soil deposits

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Earthquake Engineering and Engineering Vibration 2021年第1期20卷 1-24页

作者： Piyush Mohanty Xu Dan Suryakant biswal Subhamoy Bhattacharya CSIR-Central Building Research Institute Roorkee247667India Fluor Ltd. 140 Pinehurst RoadFarnboroughGU147BFUK Institute of Engineering Mechanics China Earthquake AdministrationSanhe 065201China University of Surrey GuildfordGU27XHUK

Bridges are a part of vital infrastructure,which should operate even after a disaster to keep emergency services *** have been numerous bridge failures during major past earthquakes due to *** other categories of failures,mid span collapse(without the failure of abutments)of pile supported bridges founded in liquefiable deposits are still observed even in most recent *** mechanism of collapse is attributed to the effects related to the differential elongation of natural period of the individual piers during liquefaction.A shake table investigation has been carried out in this study to verify mechanisms behind midspan collapse of pile supported bridges in liquefiable *** this investigation,a typical pile supported bridge is scaled down,and its foundations pass through the liquefiable loose sandy soil and rest in a dense gravel *** noise motions of increasing acceleration magnitude have been applied to initiate progressive liquefaction and to characterize the dynamic features of the *** has been found that as the liquefaction of the soil sets in,the natural frequency of individual bridge support is reduced,with the highest reduction occurring near the central *** a result,there is differential lateral displacement and bending moment demand on the *** has also been observed that for the central pile,the maximum bending moment in the pile will occur at a higher elevation,as compared to that of the interface of soils of varied stiffness,unlike the abutment *** practical implications of this research are also highlighted.

关键词： bridges midspan failure liquefaction bridge collapse earthquake pile shake table test natural frequency

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Frequency dependent electrical properties of Na_(2)Pb_(2)R_(2)W_(2)Ti_(4)Nb_(4)O_(30)(R=Nd,Sm)ceramics

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Journal of Advanced Ceramics 2014年第3期3卷 215-223页

作者： Lalatendu biswal Piyush RDAS Banarji BEHERA Department of Physics SOTKIIT UniversityBhubaneswar-751024OdishaIndia Department of Physics Veer Surendra Sai University of TechnologyBurla-768018SambalpurIndia School of Physics Sambalpur UniversityJyoti ViharBurla-768019OdishaIndia

In the present research work,frequency dependent electrical properties of tungsten bronze structured compounds Na2Pb2R2W2Ti4Nb4O30(R=Nd,Sm)are reported.X-ray diffraction(XRD)study of polycrystalline ceramic samples confirms the formation of compounds with orthorhombic *** of frequency dependent electrical data in the framework of modulus and conductivity formalism suggests the presence of thermally activated relaxation process in the compounds,which show Arrhenius *** magnitudes of activation energies give the nature of the relaxing *** real and imaginary parts of complex modulus trace the depressed semicircle in complex plane,suggesting non-Debye type relaxation process in the *** power law behavior of admittance data is successfully modeled by introducing constant phase element(CPE)to the equivalent circuit.A large value of power law parameter(n)of CPE below ferroelectric transition temperature(Tc)is attributed to the cooperative response of the dipoles which is reduced above *** behavior is correlated with the frequency dependence of CPE,suggesting a physical meaning to *** frequency dependent AC conductivity at different temperatures follows Jonscher’s universal power *** and West formalism is used to estimate the hopping rate,activation enthalpy and charge carrier concentration in the materials.

关键词： ceramics electrical properties microstructure electrical conductivity

Settling characteristics of ultrafine iron ore slimes

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International Journal of Minerals,Metallurgy and Materials 2012年第2期19卷 95-99页

作者： Chinthapudi Eswaraiah Surendra Kumar biswal Barada Kanta Mishra Institute of Minerals and Materials Technology (IMMT) Council of Scientific and Industrial Research (CSIR) Bhubaneswar 751 013 India

The slurry settling characteristics are the most important to design a thickener in process industries. In this work, the iron ore slurry from the screw classifier overflow was used for the settling study. It was observed that the original slurry exhibited a low settling velocity and a turbid supernatant during the settling process. Commercial flocculating agents with anionic, cationic, and nonionic characters were used to improve the settling behavior of suspensions, which were added into the slurry at different ranges of slurry pH values, respectively. The settling results show that the use of flocculants increase the settling rate by several times. Compared with the cationic and non-ionic flocculants, the anionic flocculant is more effective in enhancing the slurry settling rate. The small dose of the anionic flocculant is found to be more effective, but the other flocculants are less effective even at higher dosages. The simulation of an industrial thickener was carried out based on the laboratory settling data, and the appropriate design and selection parameters of the industrial thickener were estimated.

关键词： iron ores dewatering flocculation thickener design

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