检索结果-南通市图书馆

REmnO3（RE=Pr,Nd,Sm,Eu,Gd） perovskite as efficient catalysts for oxygen reduction reaction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第11期42卷 2078-2087页

作者： Rakesh ranjan mahalik Siba Soren Ipsha Hota A.k.Debnath k.P.muthe Purnendu Parhi Department of Chemistry Ravenshaw University Technical Physics Division Bhabha Atomic Research Centre

Rare earth metal based perovskite emerges as important catalytic material for energy production and *** ABO3type materials are now the focus of research in the field of oxygen reduction and evolution ***,in this work we evaluated the oxygen reduction properties of the synthesized one-dimensional REmnO3（RE=Pr,Nd,Sm,Eu and Gd）.The one-dimensional REmnO3prepared by the hydrothermal synthesis route results in pure phase perovskite on *** perovskite was characte rized with X-ray diffraction,Fourier transform-infrared（FT-IR）,field emission-scanning electron microscopy（FE-SEm）,transmission electron microscopy（TEm） and X-ray photoelectron spectroscopy（XPS）.The oxygen reduction reaction activities were investigated with the help of electrochemical workstation that consists of three-electrode system immersed in 0.1 mol/L kOH electrolyte solution saturated with *** koutechy-Levich plot obtained from rotating ring disk electrode shows all the prepared catalysts follow 4e-processes during oxygen *** effect of "A" site cation variation in REmnO3 on oxygen reduction reaction is ***3showed better onset potential for oxygen reduction reaction among the prepared rare earth ***3having high RE:mn ratio（A-site rich co mpositions） promotes oxygen reduction reaction（ORR） *** the perovs kites showed good oxygen reduction property with high stability and methanol tolerance.

关键词： Electrocatalytic activity Oxygen reduction reaction (ORR) Perovskite Rare earths REmnO3 SmmnO3

Investigation of proton structure function F_(2)^(p)at HERA in light of an analytical solution to the Balitsky–kovchegov equation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2024年第3期76卷 120-126页

作者： ranjan Saikia Pragyan Phukan Jayanta kumar Sarma HEP laboratory Department of PhysicsTezpur UniversityTezpurAssam-784028India Department of Physics Moran CollegeMoranhatAssam-785670India

In this paper,the proton structure function F_(2)^(p)(x,Q^(2))at small-x is investigated using an analytical solution to the Balitsky–kovchegov(Bk)*** the context of the color dipole description of deep inelastic scattering(DIS),the structure function F_(2)^(p)(x,Q^(2))is computed by applying the analytical expression for the scattering amplitude N(k,Y)derived from the Bk *** transverse momentum k and total rapidity Y,the scattering amplitude N(k,Y)represents the propagation of the quark-antiquark dipole in the color dipole description of *** the Bk solution we extracted the integrated gluon density xg(x,Q^(2))and then compared our theoretical estimation with the LHAPDF global data fits,NNPDF3.1sx and ***,we have investigated the behavior of F_(2)^(p)(x,Q^(2))in the kinematic region of 10^(-5)≤x≤10^(-2)and 2.5 GeV^(2)≤Q^(2)≤60 GeV^(2).Our predicted results for F_(2)^(p)(x,Q^(2))within the specified kinematic region are in good agreement with the recent high-precision data for F_(2)^(p)(x,Q^(2))from HERA(H1 Collaboration)and the LHAPDF global parametrization group NNPDF3.1sx.

关键词： quantum chromodynamics(QCD) perturbative QCD(pQCD) proton structure function small-x Balitsky-kovchegov equation

维普期刊数据库

An improved reverse time migration for subsurface imaging over complex geological structures:A numerical study

在线全文

学校读者我要写书评

暂无评论

Energy Geoscience

Energy Geoscience 2024年第2期5卷 290-297页

作者： Alok kumar Routa Priya ranjan monahty Department of Applied Geophysics IIT(ISM)DhanbadJharkhandIndia

In seismic exploration,it is a critical task to image and interpret different seismic signatures over complex geology due to strong lateral velocity contrast,steep reflectors,overburden strata and dipping *** understand the behavior of these seismic signatures,nowadays Reverse Time migration(RTm)technique is used extensively by the oil&gas *** the extrapolation phase of RTm,the source wavefield needs to be saved,which needs high storage memory and large computing *** two are the main obstacles of RTm for production *** order to overcome these disadvantages,in this study,a second-generation improved RTm technique is *** this improved form,a shift operator is introduced at the time of imaging condition of RTm algorithm which is performed automatically both in space and time *** effort is made to produce a better-quality image by minimizing the computational time as well as numerical *** proposed method is applied over various benchmark models and validated by implementing over one field data set from the Jaisalmer Basin,*** the analysis,it is observed that the method consumes a minimum of 45%less storage space and reduce the execution time by 20%,as compared to conventional *** proposed RTm is found to work efficiently in comparison to the conventional RTm both in terms of imaging quality and minimization of numerical artefacts for all the benchmark models as well as field data.

关键词： Imaging condition Reverse time migration(RTm) Seismic imaging Velocity-depth model Wave propagation

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

作者： Jyoti ranjan Barik kishore Chandra Biswal Department of Civil Engineering National Institute of Technology RourkelaOdisha 769008India

The seismic behavior of a partially filled rigid rectangular liquid tank is investigated under short-and longduration ground motions.A finite element model is developed to analyze the liquid domain by using four-noded quadrilateral *** competency of the model is verified with the available *** 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 *** 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 *** 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 ***,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 *** 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

维普期刊数据库

Doppler-resilient waveform design in integrated mImO radar-communication systems

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第1期67卷 187-202页

作者： Zhengchun ZHOU Bing LIU Bingsheng SHEN Avik ranjan ADHIkARY Pingzhi FAN Institute of mobile Communications Southwest Jiaotong University Department of mathematics Southwest Jiaotong University

In recent years,the increased high-rate wireless services(5G and 6G) and reliable sensing capabilities(automotive radar,air traffic control,geophysical monitoring),have led to more serious spectrum ***,radars and communication systems are often seen to be “competing” for the same *** this scenario,an integrated platform for radar and communication systems seems to be an optimal solution to address the *** this paper,we propose a preamble waveform design based on zero-correlation zone(ZCZ) and zero odd-correlation zone(ZOCZ) sequence sets,which are Doppler resilient in multiple-input,multiple-output(mImO) *** preamble waveforms can be simultaneously used for channel estimation and radar sensing in RadCom *** ambiguity function of the proposed waveforms displays low/zero sidelobes within a time-delay correlation ***,we give some numerical results to show the efficiency of the proposed waveforms in radar sensing and channel estimation.

关键词： ambiguity function correlation channel estimation integrated radar and communication (Rad-Com) systems mImO radar zero correlation zone (ZCZ) sequence set zero odd-correlation zone (ZOCZ) sequence set

Prediction of bearing capacity of pile foundation using deep learning approaches

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2024年第6期18卷 870-886页

作者： manish kUmAR Divesh ranjan kUmAR Jitendra kHATTI Pijush SAmUI kamaldeep Singh GROVER Department of Civil Engineering SRM Institute of Science and Technology Tiruchirappalli CampusTrichy 621105India Department of Civil Engineering National Institute of Technology PatnaBihar 800005India Department of Civil Engineering Faculty of EngineeringThammasat School of EngineeringThammasat UniversityBangkok10200Thailand Department of Civil Engineering Rajasthan Technical UniversityKota 324010India

The accurate prediction of bearing capacity is crucial in ensuring the structural integrity and safety of pile *** research compares the Deep Neural Networks(DNN),Convolutional Neural Networks(CNN),Recurrent Neural Networks(RNN),Long Short-Term memory(LSTm),and Bidirectional LSTm(BiLSTm)algorithms utilizing a data set of 257 dynamic pile load tests for the first ***,this research illustrates the multicollinearity effect on DNN,CNN,RNN,LSTm,and BiLSTm models’performance and accuracy for the first time.A comprehensive comparative analysis is conducted,employing various statistical performance parameters,rank analysis,and error matrix to evaluate the performance of these *** performance is further validated using external validation,and visual interpretation is provided using the regression error characteristics(REC)curve and Taylor *** from the comparative analysis reveal that the DNN(Coefficient of determination(R^(2))_(training(TR))=0.97,root mean squared error(RmSE)_(TR)=0.0413;R^(2)_(testing(TS))=0.9,RmSE_(TS)=0.08)followed by BiLSTm(R^(2)_(TR)=0.91,RmSE_(TR)=0.782;R^(2)_(TS)=0.89,RmSE_(TS)=0.0862)model demonstrates the highest performance *** is noted that the BiLSTm model is better than LSTm because the BiLSTm model,which increases the amount of information for the network,is a sequence processing model made up of two LSTms,one of which takes the input in a forward manner,and the other in a backward *** prediction of pile-bearing capacity is strongly influenced by ram weight(having a considerable multicollinearity level),and the effect of the considerable multicollinearity level has been determined for the model based on the recurrent neural network *** this study,the recurrent neural network model has the least performance and accuracy in predicting the pile-bearing capacity.

关键词： deep learning algorithms high-strain dynamic pile test bearing capacity of the pile

Borderline lepromatous leprosy:A case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical medicine 2024年第7期17卷 329-332页

作者： Nilshan Fernando Chiranthi Welhenge ranjan Premaratna Ahamed Uwyse Registrar in medicine University Medical UnitColombo North Teaching HospitalRagamaSri Lanka Honorary Consultant Physician in medicine University Medical UnitColombo North Teaching HospitalRagamaSri Lanka Department of medicine Faculty of MedicineUniversity of KelaniyaP.O Box 6Thalagolla RoadRagamaSri Lanka Department of Dermatology Colombo North Teaching HospitalRagamaSri Lanka

Rationale:Lepromatous leprosy can have many atypical presentations,obscuring early *** present a case of lepromatous leprosy,presenting with atypical features,which made a diagnostic *** concerns:A 48-year-old man presented with bilateral lower limb oedema and scaly“ichthyosis like”skin rash in both hands and feet,hepatosplenomegaly and pancytopenia,over a course of three months,without any classical features of leprosy.A skin biopsy revealed an unexpected diagnosis of borderline lepromatous ***:Lepromatous ***:multi-drug regimen treatment with rifampicin,dapsone and clofazimine for lepromatous ***:The patient made a good clinical ***:In endemic settings,clinicians should be aware of similar atypical manifestations of leprosy to face the global challenge of eradicating this chronic deforming disease.

关键词： Lepromatous leprosy Hepatosplenomegaly Hemophagocytosis Pancytopenia Ichthyosis

Artificial Intelligence for maximizing Agricultural Input Use Efficiency: Exploring Nutrient, Water and Weed management Strategies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2024年第7期93卷 1569-1598页

作者： Sumit Sow Shivani ranjan mahmoud F.Seleiman Hiba m.Alkharabsheh mukesh kumar Navnit kumar Smruti ranjan Padhan Dhirendra kumar Roy Dibyajyoti Nath Harun Gitari Daniel O.Wasonga Department of Agronomy Dr.Rajendra Prasad Central Agricultural UniversityPusaSamastipurBihar848125India Department of Plant Production College of Food and Agriculture SciencesKing Saud UniversityRiyadh11451Saudi Arabia Department of Crop Sciences Faculty of AgricultureMenoufia UniversityShibin El-Kom32514Egypt Department of Water Resources and Environmental management Faculty of Agricultural TechnologyAl Balqa Applied UniversitySalt19117Jordan Division of Agronomy ICAR-Indian Agricultural Research InstitutePusa CampusNew Delhi110012India Department of Soil Science Dr.Rajendra Prasad Central Agricultural UniversityPusaSamastipurBihar848125India Department of Agricultural Science and Technology School of Agriculture and Environmental SciencesKenyatta UniversityNairobi43844Kenya Department of Crop Sciences University of Illinois Urbana-ChampaignUrbanaIL 61801USA

Agriculture plays a crucial role in the economy,and there is an increasing global emphasis on automating agri-cultural *** the tremendous increase in population,the demand for food and employment has also increased signiﬁ*** methods traditionally used to meet these requirements are no longer ade-quate,requiring solutions to issues such as excessive herbicide use and the use of chemical *** of technologies such as the Internet of Things,wireless communication,machine learning,artiﬁcial intelligence(AI),and deep learning shows promise in addressing these ***,there is a lack of comprehensive documentation on the application and potential of AI in improving agricultural input efﬁ*** address this gap,a desk research approach was used by utilizing peer-reviewed electronic databases like Pubmed,Scopus,Goo-gle Scholar,Web of Science,and Science Direct for relevant *** of 327 initially identiﬁed articles,180 were deemed pertinent,focusing primarily on AI’s potential in enhancing yield through better management of nutrients,water,and *** into account researchﬁndings worldwide,we found that AI technologies could assist farmers by providing recommendations on the optimal nutrients to enhance soil quality and deter-mine the best time for irrigation or herbicide *** present status of AI-driven automation in agricul-ture holds signiﬁcant promise for optimizing agricultural input utilization and reducing resource waste,particularly in the context of three pillars of crop management,i.e.,nutrient,irrigation,and weed management.

关键词： Agriculture artiﬁcial intelligence crop management nutrient irrigation weed management resource use efﬁciency

Sodium glucose cotransporter-2 inhibitors and heart disease:Current perspectives

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Cardiology 2024年第5期16卷 240-259页

作者： Sunetra mondal Subhodip Pramanik Vibhu ranjan khare Cornelius James Fernandez Joseph m Pappachan Department of Endocrinology NRS Medical CollegeKolkata 700020West BengalIndia Department of Endocrinology Neotia Getwel Multispecialty HospitalsSiliguri 734010West BengalIndia Department of Endocrinology and metabolism Pilgrim HospitalUnited Lincolnshire Hospitals NHS TrustBoston PE219QSUnited Kingdom Department of Endocrinology and metabolism Lancashire Teaching Hospitals NHS TrustPreston PR29HTUnited Kingdom Faculty of Science Manchester Metropolitan UniversityManchester M156BHUnited Kingdom Faculty of Biology Medicine&HealthThe University of ManchesterManchester M139PLUnited Kingdom

Sodium glucose cotransporter-2 inhibitors(SGLT-2i)are antidiabetic medications with remarkable cardiovascular(CV)benefits proven by multiple randomised controlled trials and real-world *** drugs are also useful in the prevention of CV disease(CVD)in patients with diabetes mellitus(Dm).Although Dm as such is a huge risk factor for CVD,the CV benefits of SGLT-2i are not just because of antidiabetic *** molecules have proven beneficial roles in prevention and management of nondiabetic CVD and renal disease as *** are various molecular mechanisms for the organ protective effects of SGLT-2i which are still being *** understanding of the role of SGLT-2i in prevention and management of CVD is important not only for the cardiologists but also for other specialists caring for various illnesses which can directly or indirectly impact care of heart *** clinical review compiles the current evidence on the rational use of SGLT-2i in clinical practice.

关键词： SGLT2 inhibitors SGLT2i Cardiovascular disease Heart failure Atherosclerotic cardiovascular disease Diabetic kidney disease