检索结果-南通市图书馆

Investigation of strong shock wave interactions with CeO2 ceramic

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2014年第4期3卷 297-305页

作者： Vishakantaiah JAYARAM asha gupta K.P.J.REDDY Shock Induced Materials Chemistry Lab SSCUIndian Institute of ScienceBangalore-560012India Texas Materials Institute the University of Texas at AustinAustinTexas 78712USA Department of Aerospace Engineering Indian Institute of ScienceBangalore-560012India

Strong shock wave interactions with ceramic material ceria(CeO_(2))in presence of O_(2)and N2 gases were investigated using free piston driven shock tube(FPST).FPST is used to heat the test gas to very high temperature of about 6800-7700 K(estimated)at pressure of about 6.8-7.2 MPa for short duration(2-4 ms)behind the reflected shock *** is subjected to super heating and cooling at the rate of about 106 K/*** of CeO_(2)sample was done before and after exposure to shock heated test gases(O_(2)and N2).The surface composition,crystal structure,electronic structure and surface morphology of CeO_(2)ceramic were examined using X-ray photoelectron spectroscopy(XPS),X-ray diffraction(XRD),Fourier transform infrared(FTIR)spectrometry,scanning electron microscopy(SEM)and high resolution transmission electron microscopy(HRTEM).Results obtained from the experimental investigations show that CeO_(2)can withstand high pressure accompanied by thermal shock without changing its crystal *** CeO_(2)releases lattice oxygen making it possible to shift between reduced and oxidized states upon the interaction with shock heated *** to such reaction mechanism,CeO_(2)ceramic undergoes nitrogen doping with decrease in lattice *** reveal that CeO_(2)retains its crystal structure during strong shock interaction,even at elevated pressure.

关键词： shock tube shock interaction high enthalpy gas ceria nitrogen-doped surface 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

苔类斑块—可显示近代孢粉的存贮(英文)

苔类斑块—可显示近代孢粉的存贮(英文)

2010全国地衣与苔藓系统学研讨会

作者： asha gupta Birbal Sahni Institute of Palaeobotany 53 University RoadLucknow -26007India

Liverworts having leafy and thalloid taxa grow profusely in the *** patches from different localities of Indian Himalayan region have been pollen *** palynoassemblages recovered consist a large number of arboreal and ...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

苔类植物,评估现代孢粉沉积的疆界(英文)

苔类植物,评估现代孢粉沉积的疆界(英文)

Synthesis of Bi2Fe4O9 Crystalline Ceramic as Extremely Capable Photocatalyst via Proficient Chemical Route

2010全国地衣与苔藓系统学研讨会

作者： asha gupta Birbal Sahni Institute of Palaeobotany 53 University RoadLucknow -226007India

Liverworts grow profusely in the Himalayan region and includes leafy as well as thalloid *** patches collected form different localities of Himalaya have been pollen *** palynodebris recovered consist pollen of a large number of arboreals and non-arboreals, alongwith variety of spores and *** analysis showed that there is considerable disturbances in the pollen deposition as certain taxa show over / false representation (due to animophilly,etc.) while certain remain under represented - unrepresented(because of entomophilly / biodeterioration,etc.) but pollen deposition broadly reflects existing vegetation of the ***,Liverworts act as pollen trappers due to unique plant body.

关键词： Liverworts Modern Pollen

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Minerals and Materials Characterization and Engineering 2021年第5期9卷 444-461页

作者： Manish Kumar Verma Vinod Kumar Tapas Das Ravi Kumar Sonwani Vishnu Shankar Rai Dinesh Prajapati Kedar Sahoo Vishal Kumar Kushwaha asha gupta Kamdeo Mandal Department of Chemistry Indian Institute of Technology (Banaras Hindu University) Varanasi India Department of Chemical Engineering Indian Institute of Technology (Banaras Hindu University) Varanasi India

Bi2Fe4O9 crystalline ceramic was successfully synthesized through a soft chemical route at lower sintering temperature for analysis of photocatalytic behavior with respect to adsorption of Congo Red (CR) in the presence of UV-VIS irradiation. The single-phase formation of Bi2Fe4O9 ceramic was confirmed by powder X-ray diffraction studies and particle size observed by TEM analysis was found to be 148 ± 5 nm which reveals the crystalline nature of the materials. Additionally, the photocatalytic activity of Bi2Fe4O9 ceramic was evaluated by the degradation of Congo Red in presence of visible light. The optical band gap (Eg) of the synthesized materials was found to be 1.8 eV. It exhibited greater photocatalytic activity than other synthesized materials like BiFeO3 as well as TiO2 due to a smaller band gap (1.8 eV). Furthermore, process variables such as pH.

关键词： Chemical Route Microstructural Studies Dielectric Properties Adsorption Cyclic Voltammetry Analysis

Visualizing traumatic brain injury:ocular clues for diagnosis and assessment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第5期20卷 1399-1400页

作者： Morteza Abyadeh Vivek gupta Yuyi You Joao A.Paulo Mehdi Mirzaei ProGene Technologies Pty Ltd SydneyNSWAustralia Department of Clinical Medicine Faculty of MedicineHealth and Human SciencesMacquarie Medical SchoolMacquarie UniversityMacquarie ParkNorth RydeSydneyNSWAustralia Department of Cell Biology Harvard Medical SchoolBostonMAUSA

Traumatic brain injury (TBI) is defined as damage to the brain resulting from an external sudden physical force or shock to the *** is considered a silent public health epidemic causing significant death and disability *** were 64,000 TBI related deaths reported in the USA in 2020,with about US$76 billion in direct and indirect medical costs annually.

关键词： diagnosis ocular injury

A Comprehensive Survey on Federated Learning Applications in Computational Mental Healthcare

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2025年第1期142卷 49-90页

作者： Vajratiya Vajrobol Geetika Jain Saxena Amit Pundir Sanjeev Singh Akshat Gaurav Savi Bansal Razaz Waheeb Attar Mosiur Rahman Brij B.gupta Institute of Informatics and Communication University of DelhiDelhi110021India Maharaja Agrasen College University of DelhiDelhi110096India Computer Engineering Ronin InstituteMontclairNJ 07043USA Department of Research and Innovation Insights2TechinfoJaipur302001India University Centre for Research and Development(UCRD) Chandigarh UniversityChandigarh140413India Management Department College of Business AdministrationPrincess Nourah bint Abdulrahman UniversityRiyadh11671Saudi Arabia CCRI&Department of Computer Science and Information Engineering Asia UniversityTaichung413Taiwan Symbiosis Centre for Information Technology(SCIT) Symbiosis International UniversityPune411057India Center for Interdisciplinary Research University of Petroleum and Energy Studies(UPES)Dehradun248007India

Mental health is a significant issue worldwide,and the utilization of technology to assist mental health has seen a growing *** aims to alleviate the workload on healthcare professionals and aid *** applications have been developed to support the challenges in intelligent healthcare ***,because mental health data is sensitive,privacy concerns have *** learning has gotten some *** research reviews the studies on federated learning and mental health related to solving the issue of intelligent healthcare *** explores various dimensions of federated learning in mental health,such as datasets(their types and sources),applications categorized based on mental health symptoms,federated mental health frameworks,federated machine learning,federated deep learning,and the benefits of federated learning in mental health *** research conducts surveys to evaluate the current state of mental health applications,mainly focusing on the role of Federated Learning(FL)and related privacy and data security *** survey provides valuable insights into how these applications are emerging and evolving,specifically emphasizing FL’s impact.

关键词： Depression emotional recognition intelligent healthcare systems mental health federated learning stress detection sleep behaviour

Intricacies during pregnancy with gestational diabetes mellitus

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 Clinical Cases 2025年第1期13卷 62-64页

作者： Richa Rattan Rimesh Pal Parul Chawla gupta Arvind Kumar Morya Ripunjay Prasad Department of Endocrinology Post Graduate Institute of Medical Education and ResearchChandigarh 160012India Department of Ophthalmology Post Graduate Institute of Medical Education and ResearchChandigarh 160012PunjabIndia Department of Ophthalmology All India Institute of Medical SciencesHyderabad 508126TelanganaIndia Department of Ophthalmology RP Eye InstituteDelhi 110001India

The study by Cao et al aimed to identify early second-trimester biomarkers that could predict gestational diabetes mellitus(GDM)development using advanced proteomic techniques,such as Isobaric tags for relative and absolute quantitation isobaric tags for relative and absolute quantitation and liquid chromatography-mass spectrometry liquid chromatography-mass *** analysis revealed 47 differentially expressed proteins in the GDM group,with retinol-binding protein 4 and angiopoietin-like 8 showing significantly elevated serum levels compared to *** these findings are promising,the study is limited by its small sample size(n=4 per group)and lacks essential details on the reproducibility and reliability of the protein quantification methods ***,the absence of experimental validation weakens the interpretation of the protein-protein interaction network identified through bioinformatics *** study's focus on second-trimester biomarkers raises concerns about whether this is a sufficiently early period to implement preventive interventions for *** GDM risk during the first trimester or pre-conceptional period may offer more clinical *** its limitations,the study presents valuable insights into potential GDM biomarkers,but larger,well-validated studies are needed to establish their predictive utility and generalizability.

关键词： Gestational diabetes mellitus Biomarkers Differentially expressed proteins Retinol-binding protein 4 Angiopoietin-like 8 Proteomics Lifestyle interventions Early prediction

Evaluation of graphite depressants in a poly-metallic sulfide flotation circuit

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2017年第2期27卷 285-292页

作者： Nikhil gupta Department of Mining and Minerals Engineering Virginia Polytechnic Institute and State UniversityBlacksburgVA 24061USA

Synthetic dyes are commonly used for graphite depression in poly-metallic flotation circuits; however,these dyes can be very expensive. The aim of this study is to evaluate performance of certain low-cost alternative depressants for a complex lead-zinc(Pb-Zn) ore rich in graphite(Gr-C) on a conventional mini pilot-scale flotation circuit. The reagents used were commercial and industrial grade starch; agro-based waste-sugarcane bagasse and charred(burnt) bagasse powder. The primary evaluation criteria were quality(grades) of lead and zinc concentrates, their recoveries(%), and graphite rejection(%) in the *** tests using nigrosine as graphite depressant showed 94.3% rejection of Gr-C. The results with commercial starch were found as effective with 93.8% graphite rejection. Furthermore, bagasse powder showed potential in improving product quality(36.4% and 65.6% Pb grade and recovery) with an intermediate effectiveness in graphite rejection(85.6%). The order of effectiveness in Gr-C rejection follows nigrosine % commercial starch > bagasse > industrial starch > charred bagasse. In addition, the effect these depressants on silver(byproduct) grade and recovery was also investigated.

关键词： Graphite depressants Sulfide flotation Dyes Starch Bagasse Hydrophobic impurities

Asymptotic and Partial Asymptotic Hankel Operators on H^2(D^n)

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2019年第11期35卷 1729-1740页

作者： Anuradha gupta Bhawna gupta Department of Mathematics Delhi College of Arts and CommerceNetaji NagarUniversity of DelhiDelhiIndia Department of Mathematics University of DelhiDelhiIndia

In this paper,we generalize the concept of asymptotic Hankel operators on H2(D)to the Hardy space H2(Dn)(over polydisk)in terms of asymptotic Hankel and partial asymptotic Hankel operators and investigate some properties in case of its weak and strong ***,we introduce ith-partial Hankel operators on H2(Dn)and obtain a characterization of its compactness for n>*** main results include the containment of Toeplitz algebra in the collection of all strong partial asymptotic Hankel operators on H2(Dn).It is also shown that a Toeplitz operator with symbolφis asymptotic Hankel if and only if φ is holomorphic function in L∞(Tn).

关键词： Hankel operator Asymptotic Hankel operator partial asymptotic Hankel operator i(th)-partial Hankel operator i(th)-partial big Hankel operator