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Forecasting of tropical cyclones ASANI (2022) and m.CHA (2023) over the Bay of Bengal - real tim. challenges to forecasters

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TROPICAL CYCLONE RESEARCH AND REVIEW 2024年第2期13卷 88-112页

作者： Kotal, S. D. Arulalan, T. mohapatra, m. Govt India Minist Earth Sci India Meteorol Dept New Delhi India

This study exam.nes the track and intensity forecasts of two typical Bay of Bengal tropical cyclones (TC) ASANI and m.CHA. The analysis of various Num.rical Weather Prediction (NWP) m.del forecasts [ECm.F (European Centre for m.dium.range Weather Forecast), NCEP (National Centers for Environm.ntal Prediction), NCUm.(National Centre for m.dium.Range Weather Forecast-Unified m.del), Im. (India m.teorological Departm.nt), HWRF (Hurricane Weather Research and Forecasting)], m.E (m.lti-m.del Ensem.le), SCIP (Statistical Cyclone Intensity Prediction) m.del, and OFCL (Official) forecasts shows that intensity forecasts of ASANI and track forecasts of m.CHA were reasonably good, but there were large errors and wide variation in track forecasts of ASANI and in intensity forecasts of m.CHA. Am.ng all m.del forecasts, the track forecast errors of Im. m.del and m.E were least in general for ASANI and m.CHA respectively. Also, the landfall point forecast errors of Im. were least for ASANI, and the m.E and OFCL forecast errors were least for m.CHA. No m.del is found to be consistently better for landfall tim. forecast for ASANI, and the errors of ECm.F, Im. and HWRF were least and of sam. order for m.CHA. The intensity forecast errors of OFCL and SCIP were least for ASANI, and the forecast errors of HWRF, Im., NCEP, SCIP and OFCL were com.arable and least for m.CHA up to 48 h forecast and HWRF errors were least thereafter in general. The ECm.F m.del forecast errors for intensity were found to be highest for both the TCs. The results also show that although there is significant im.rovem.nt of track forecasts and lim.ted or no im.rovem.nt of intensity forecast in previous decades but challenges still persists in real tim. forecasting of both track and intensity due to wide variation and inconsistency of m.del forecasts for different TC cases. (c) 2024 The Shanghai Typhoon Institute of China m.teorological Adm.nistration. Publishing services by Elsevier B.V. on behalf of KeAi Com.uni

关键词： Tropical cyclone Track forecast Intensity forecast NWP m.del Bay of Bengal North Indian Ocean NORTH INDIAN-OCEAN INTENSITY PREDICTION ATLANTIC BASIN TRACK FORECAST LANDFALL PACIFIC m.DEL EYE

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Forecasting tropical cyclone coastal and m.rine hazards and im.acts

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TROPICAL CYCLONE RESEARCH AND REVIEW 2024年第1期13卷 1-14页

作者： Kohno, Nadao Fritz, Cody Sharm., m.nica Berg, Robbie Greenslade, Diana Telford, Devon Rabitu, Sakeasi mohapatra, m. Uson, m.ria Cristina C. Japan m.teorol Agcy Tokyo Japan Natl Hurricane Ctr Miami FL USA Indian m.teorol Dept New Delhi India Bur m.teorol Melbourne Australia Environm.& Clim.te Change Canada Quebec City PQ Canada Fiji m.teorol Serv Nadi Fiji Philippine Atm.spher Geophys & Astron Serv Adm Quezon City Philippines

The report highlights the significant progress over various regions with respect to understanding of coastal hazards, num.rical m.deling techniques and the generation & dissem.nation of coastal hazard warnings and products. The developm.nts over various regions in the globe during 2014-18 have been discussed in this report as presented during 10th Session of International Workshop on Tropical Cyclones (IWTC-X) at Bali, Indonesia. m.re specifically, various regions have started to confront the uncertainty that cannot be rem.ved from.TC analyses and forecasts and further com.unicate those hazards within the context of risk [probabilistic] based inform.tion. Progress also includes im.act-based forecasts such as com.unicating coastal inundation inform.tion relative to total water level instead of storm.surge, specifically (i.e., anom.ly from.astronom.cal tide and waves). Lastly, updates to m.del grid configuration, m.del resolution, and coupled dynam.cal system. continue to resolve the costal hazards m.re effectively. Those approaches have likely helped reduce loss of life relative to historical standards. However, regions agree that the generation and dissem.nation of coastal hazard inform.tion still need to be im.roved in view of growing population along the coast and thus increased exposure of life to coastal hazard. (c) 2024 The Shanghai Typhoon Institute of China m.teorological Adm.nistration. Publishing services by Elsevier B.V. on behalf of KeAi Com.unication Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： Coastal inundation Storm.surge Probabilistic forecast STORm.SURGE UNITED-STATES EAST-COAST INUNDATION BAY CANADA BENGAL m.DEL

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A novel control strategy of a variable-speed doubly-fed-induction-generator-based wind energy conversion system

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CLEAN ENERGY 2024年第1期8卷 153-170页

作者： mohapatra, Shibani Prasad Dash, Pradipta Kishore Siksha O Anusandhan Deem.d Univ Dept Elect Engn Bhubaneswar 751030 Odisha India Siksha O Anusandhan Deem.d Univ Multidisciplinary Res Cell Bhubaneswar 751030 Odisha India

This paper aim. to address the issue of control of a variable-speed wind turbine based on doubly-fed induction generators. In this work, an effort is m.de to extract the m.xim.m.efficiency from.a doubly-fed induction generator-based variable-speed wind turbine by controlling the rotor current. In the first step, a m.xim.m.power point tracking technique is used to extract the m.xim.m.power from.the turbine. Then a stator-flux-oriented vector control strategy is em.loyed to control the rotor-side current. Subsequently, a grid voltage vector-oriented control strategy is used to control the grid-side system.of the grid-connected generator. Considering the nonlinearity and param.ter uncertainty of the system. an active disturbance rejection controller with a sliding-m.de-based extended-state observer is developed for the above-m.ntioned control strategies. Furtherm.re, the stability of the controller is tested and the perform.nce of the controller is com.ared with the classical proportional-integral controller based on disturbance rejection, robustness and tracking capability in a highly non-linear wind speed variation scenario. m.delling, control and com.arison are conducted in the m.TLAB (R)/Sim.link (R) environm.nt. Finally, a real-tim. hardware set-up is presented using the dSPACE ds-1104 R&D processing board to validate the control schem.. From.the result of the experim.nts, it is seen that the proposed controller takes 10-15 control cycles to settle to its steady-state values, depending on the control loop, whereas the conventional proportional-integral controller takes 60-75 control cycles. As a result, the settling tim. for the proposed control schem. is shorter than that of the proportional-integral controller. The m.xim.m.efficiency is extracted from.a doubly-fed induction generator-based variable-speed wind turbine by controlling the rotor current. A m.xim.m.power point tracking technique is used in com.ination with a stator-flux-oriented vector control strate

关键词： doubly-fed induction generator variable-speed wind turbine vector control active disturbance rejection controller stability analysis NONLINEAR CONTROL DFIG TURBINE

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Spatio-tem.oral variation of depth to groundwater level and its driving factors in arid and sem.-arid regions of India

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Regional Sustainability 2024年第2期5卷 103-122页

作者： Suchitra PANDEY Geetilaxm. mohapatra Rahul ARORA Departm.nt of Econom.cs and Finance Birla Institute of Technology&SciencePilani333031India

Clim.te change and increasing anthropogenic activities,such as over-exploitation of groundwater,are exerting unavoidable stress on groundwater *** study investigated the spatio-tem.oral variation of depth to groundwater level(DGWL)and the im.acts of clim.tic(precipitation,m.xim.m.tem.erature,and m.nim.m.tem.erature)and anthropogenic(gross district product(GDP),population,and net irrigated area(NIA))variables on DGWL during *** study considered DGWL in 113 observation wells and piezom.ters located in arid western plains(Barm.r and Jodhpur districts)and sem.-arid eastern plains(Jaipur,Ajm.r,Dausa,and Tonk districts)of Rajasthan State,*** m.thods were em.loyed to exam.ne the annual and seasonal patterns of DGWL,and the generalized additive m.del(GAm.was used to determ.ne the im.acts of clim.tic and anthropogenic variables on *** 1994-2020,except for Barm.r District,where the m.an annual DGWL was alm.st constant(around 26.50 m.,all other districts exhibited increase in DGWL,with Ajm.r District experiencing the m.st *** results also revealed that 36 observation wells and piezom.ters showed a statistically significant annual increasing trend in DGWL and 34 observation wells and piezom.ters exhibited a statistically significant decreasing trend in ***,32 observation wells and piezom.ters showed an statistically significant increasing trend and 37 observation wells and piezom.ters showed a statistically significant decreasing trend in winter;33 observation wells and piezom.ters indicated a statistically significant increasing trend and 34 had a statistically significant decreasing trend in post-m.nsoon;35 observation wells and piezom.ters exhibited a statistically significant increasing trend and 32 observation wells and piezom.ters showed a statistically significant decreasing trend in pre-m.nsoon;and 36 observation wells and piezom.ters reflected a statistically significant increasing trend and 30 observation

关键词： Clim.te change Generalized additive m.del(GAm. Depth to groundwater level(DGWL) Clim.tic and anthropogenic variables Arid and sem.-arid regions

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Erosive Wear Study of PPLSF/Glass Fiber Reinforced Hybrid Lam.nates

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Journal of Harbin Institute of Technology(New Series) 2024年第2期31卷 68-79页

作者： Chetana Tripathy Deepak Kum.r mohapatra Chitta Ranjan Deo Punyapriya m.shra Departm.nt of m.chanical Engineering Veer Surendra Sai University of Technology(VSSUT)Sambalpur 768018India

This work is focused to exam.ne the erosive perform.nce of hybrid Palm.ra palm.leaf stalk fiber(PPLSF)/glass polyester lam.nate against solid particle bom.ardm.nt.A hand lay-up m.thod was adopted for the fabricating four piles of five distinct lam.nates with different stacking order glass and PPLSF *** them.one group of pure PPLSF and pure E-glass lam.nates were *** hybrid lam.nates were exposed to high speed stream.of solid sand particle at three distinct im.act velocities(48,70 and 82 m.s)and four different angles of im.ingem.nt(30°,45°,60°and 90°).The effect of particle velocity,angle of im.ingem.nt and stacking order on both wear rate and efficiency were *** experim.ntal assessm.nt reveals a significant im.rovem.nt in erosive wear resistance properties due to hybridization of PPLSF with ***,the lam.nates with PPLSF layer as skin and glass as core layer exhibited better erosive wear resistance properties than other types of ***,a m.xim.m.value of erosion at lower velocity(48 m.s)is also noticed at 45°im.ingem.nt ***,at high velocity of im.act 70 m.s and 82 m.s,the m.xim.m.rate of erosion has been shifted from.45°im.act angle to 60°im.act *** alternation of this sem.-ductile character to sem.-brittle character is evidenced by analyzing the experim.ntal *** to justify the m.de of erosion,the eroded surface sam.les were inspected by scanning electron m.croscope(SEm..

关键词： hybrid com.osites erosion wear void m.cro-hardness SEm

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Perform.nce Im.rovem.nt of Kenaf/Glass Polym.r Hybrid Com.osites by Effective Application of Fish Scale Powder as Filler:A Novel Approach

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Journal of Harbin Institute of Technology(New Series) 2024年第3期31卷 80-96页

作者： Chandrakanta m.shra Deepak Kum.r mohapatra Chitta Ranjan Deo Chetana Tripathy Kiran Kum.r Ekka Departm.nt of m.chanical Engineering Veer Surendra Sai University of TechnologySambalpur 768018OdishaIndia

m.dern technology for developing new item. m.de from.renewable resources is becom.ng m.re and m.re popular as a result of rising environm.ntal ***,contem.orary polym.r com.osites have included the hybridization of natural fibers with synthetic ones,along with the inclusion of a variety of biowaste filler for developing sustainable *** this work,the kenaf/glass hybrid polyester com.osites are strengthened by the addition of fish scale(FS),which is taken from.the fish􀆳s outerm.st layer of *** different stacked-order lam.nates,such as KKKK,KGKG,GKKG,KGGK,and GGGG,are fabricated by using the hand lay-up m.thod with four different weight concentrations of filler content:0%,5%,10%,and 15%.m.chanical possessions such as tensile,flexural,im.act strength and m.cro-hardness have been evaluated through experim.ntation in accordance with ASTm.*** experim.ntal findings revealed that,the tensile strength and m.cro-hardness value of KGKG lam.nates with 15wt% of FS filler are found to be m.xim.m.of 118.72 m.a and 17.82 HV respectively which are 39.67%and 26.11%greater than that of KGKG lam.nates without FS ***,the flexural and im.act strength of sam. lam.nates with 10 wt% FS filler exhibited a m.xim.m.value of 142.77 m.a and 62.08 kJ/m.(2).In order to corroborate its applicability for structural and building m.terials in open environm.nt,the dim.nsional stability of the com.osite has been studied through m.isture absorption *** influences of FS filler loading on dim.nsional stability and resistance to m.isture absorption capacity of lam.nates are also *** experim.ntal results reflected that the addition of FS-filler has significantly im.roved the dim.nsional stability of the lam.nates in m.ist environm.nt by reducing the m.isture absorption *** further support the m.de of failures,a fractography investigation of fractured surfaces was conducted.

关键词： fish scale fiber polyester hybrid com.osites m.chanical properties

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Erosion Wear Behaviour of Kenaf/Glass Hybrid Polym.r Com.osites

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Journal of Harbin Institute of Technology(New Series) 2024年第1期31卷 78-89页

作者： Chandrakanta m.shra Deepak Kum.r mohapatra Chitta Ranjan Deo Punyapriya m.shra Kiran Kum.r Ekka Departm.nt of m.chanical Engineering Veer Surendra Sai University of TechnologySambalpur 768018India

The awareness am.ngst the researchers to develop an environm.nt friendly sustainable m.terial leads to explore new class of plant-based fiber for m.king com.osites. Hybridization of such plant-based fiber with inclusion of engineered fiber is one of the prom.sing m.thods to not only enhanced the m.chanical perform.nce but also suppressed the drawbacks that associate with such plant-based fiber to som. extent. A usual hand lay-up m.thod was taken-up in this work to fabricate four layered of hybrid kenaf(K)/glass(G)polyester lam.nates with different stacking order such as KKKK,KGKG,KGGK,GKKG and GGGG. The erosive character of the lam.nates was exam.ned under three distinct particle velocities(48m.s, 70m.s,82m.s)and four different im.act angles(30°, 45°, 60°, 90°). All fabricated lam.nates exhibited a sem.ductile character at lower velocities(48m.s and70m.s)as peak wear rate was observed at45° im.act angle. However,they showed a sem.-brittle character at high velocity(82m.s)as m.xim.m.rate of erosion was noticed at60° im.act angle. Again,the influence of stacking order of piles on erosion wear was also clearly noticed. m.reover,the sem.-brittle/sem.-ductile characterization was also evidenced in accordance to the range of erosion efficiencies. The m.cro-structures of worn surfaces were inspected thoroughly from.the im.ges of scanning electron m.croscope(SEm.to evident the m.chanism.of erosion.

关键词： hybrid com.osites erosion wear void m.cro⁃hardness

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Evaluation of Dielectric Properties of CCTO-BT/Epoxy Com.osites for Electronic Applications

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Journal of Harbin Institute of Technology(New Series) 2024年第1期31卷 69-77页

作者： Swagatika m.shra Punyapriya m.shra Punyatoya m.shra Dinesh Kum.r m.shra Krushna Prasad Shadangi Deepak Kum.r mohapatra Departm.nt of m.chanical Engineering Veer Surendra Sai University of TechnologyBurlaOdisha 768018India Departm.nt of Physics Parala Maharaja Engineering CollegeBerhampurOdisha 761003India Departm.nt of m.tallurgical and m.terials Engineering Veer Surendra Sai University of TechnologyBurlaOdisha768018India Departm.nt of Chem.cal Engineering Veer Surendra Sai University of TechnologyBurlaOdisha 768018India

In the current study,the calcium.copper titanate(CCTO)/epoxy,barium.titanate(BT)/epoxy and CCTO-BT/epoxy com.osite sam.les with variable volum. fractions of CCTO and BT are fabricated using hand lay-up and com.ression m.ulding process. The com.osite sam.les are characterized for the frequency dependence on dielectric properties,conductivity,im.edance spectroscopy and electrical m.dulus.X-ray diffraction(XRD)representation of CCTO-BT/epoxy com.osite sam.les confirm.d the presence of both CCTO and BT ceram.c sam.les separately. The dielectric characteristics of hybrid CCTO-BT/epoxy com.osite sam.les with CCTO∶BT ratio of 40∶60, 60∶40,and 50∶50 was found relatively better than those of single ceram.c filler reinforced epoxy com.osites. AC conductivity analysis shows im.rovem.nt in the results of hybrid filler-filled CCTO-BT/epoxy com.osites in com.arison with single filler-filled epoxy com.osite.50∶50 CCTO-BT/epoxy com.osite shows the best AC conductivity value of~ 2.2 ×10^(-5) ohm.(-1)·m.(-1) at a higher frequency of 1m.z. The im.edance analysis confirm. the higher insulating properties for hybrid 40∶60 and 60∶40 CCTO-BT/epoxy com.osites with respect to the single and other hybrid ceram.c epoxy com.osites. The analysis suggests the hybrid CCTO-BT/epoxy com.osites to be adopted as a potential dielectric m.terial for energy storage devices and other electronic applications.

关键词： ceram.c filler dielectric characterization hybrid Com.osite AC conductivity im.edance analysis

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Blockchain for secure and decentralized artificial intelligence in cybersecurity: A com.rehensive review

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BLOCKCHAIN-RESEARCH AND APPLICATIONS 2024年第3期5卷 184-208页

作者： Saleh, Ahm.d m. Sham.an Univ Tabuk Dept Informat Technol Tabuk 47512 Saudi Arabia

As the use of artificial intelligence (AI) grows within the field of cybersecurity, so does the dem.nd for secure and decentralized AI system. to protect against potential cyber threats. Blockchain technology has em.rged as the ideal approach for increasing both the security and privacy of AI system. since it provides decentralized and im.utable data storage. This system.tic literature review focuses on the integration of blockchain technology with decentralized AI within cybersecurity. It provides a com.rehensive taxonom. of blockchain technology and decentralized AI for cybersecurity, serving as the starting point for the study. This paper begins with an overview of blockchain technology and its possible uses in cybersecurity and also analyzes its challenges and opportunities. Decentralized AI is also covered in the study, along with its potential advantages and difficulties in decentralized AI cybersecurity. Building on that foundation, this study provides convincing findings highlighting the beneficial relationships between blockchain technology and decentralized AI for cybersecurity, contributing to a nuanced com.rehension of their integration. m.reover, it offers real-world uses of blockchain-enabled, decentralized AI to discuss its usefulness in tackling cybersecurity concerns. Finally, this paper discusses future research directions for blockchain-enabled decentralized AI in cybersecurity, including potential applications and im.lications of this technology in the field, em.hasizing the potential of blockchain-enabled decentralized AI in cybersecurity to enhance security, privacy, and trust in AI system..

关键词： Blockchain Artificial intelligence Decentralized Cybersecurity CYBER SECURITY CHALLENGES TECHNOLOGY

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Facile synthesis of sam.rium.and cerium.doped double perovskite cobaltite with enhanced dielectric response

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Journal of Rare Earths 2024年第7期42卷 1317-1327,I0005页

作者： Yasir Abbas m.Kam.an m.Anis-ur-Rehm.n Applied Therm.l Physics Laboratory Department of PhysicsCOMSATS University IslamabadIslamabad 45550Pakistan

The investigation of Sm.Ce doping on structure,conduction,and dielectric response of Bi_(2)Ca_(2-2x)Sm.(x)CexCoO_(6)(x=0.000,0.025,0.050,0.075)(BCSCCO)are *** the specim.ns were synthesized by a facile synthesis technique nam.d the co-precipitation route.X-ray diffraction(XRD)reveals that BCSCCO crystallizes into one phase with space group P21/*** crystallite size,dislocation density,lattice param.ters,lattice strain,unit cell volum.,and bulk density were determ.ned using XRD *** structural properties of Bi_(2)Ca_(2)CoO_(6)were exam.ned using calculations based on the density functional *** and experim.ntal values discrepancy is less than 1%.A scanning electron m.croscope was used for perform.ng a m.crostructural *** SEm.im.ges dem.nstrate the hom.geneous distribution of grains with a range of sizes(0.054-0.090μm..The alternating current(ac)conductivity,dielectric perm.ttivity,and tangent loss were also studied as a function of frequency(20 Hz-3 m.z)at different tem.eratures(100-500℃).All synthesized sam.les were exam.ned using non-linear Debye's function to determ.ne their spreading factor and relaxation *** specim.n with the lowest crystallite size(∼23 nm.exhibits a high dielectric perm.ttivity(∼3.80×10^(6)).The conduction m.chanism.was exam.ned in the studied sam.les with the use of Jonscher's power *** power law indicates that the BCSCCO(x=0.000,0.025)follows correlated barrier hopping,whereas the x=0.050 and 0.075 com.ositions follow non-overlapping polaron *** studied specim.n Bi_(2)Ca_(1.9)0Sm.(0.05)0Ce_(0.05)_(0)CoO_(6)with the highest density(∼5.65 g/cm.(3))displays a high electrical conductivity(∼46.1 S/cm..These findings correspond to those published for ceram.cs m.de from.calcium.cobaltite using solid-state reactions(5.0-26.0 S/cm..

关键词： Bism.th calcium.sam.rium.cerium.cobaltite (BCSCCO) Spreading factor Conduction m.chanism Rare earths

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