检索结果-南通市图书馆

Double co-host emitter based top emitting white organic light emitting diodes with enhanced brightness and efficiency

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2021年第10期17卷 581-585页

作者： Neha jain Sujata Pandey Rajiv kr.Singh O.P.Sinha Department of ECE Amity School of Engineering and TechnologyAmity UniversityUPNoidaIndia Department ofEEE Galgotia College of Engineering and TechnologyGreater NoidaIndia CSIR-National Physical Laboratory New DelhiIndia Amity Institute of Nanotechnology Amity University UPNoidaIndia

Novel and simplified bi-layer top-emitting white organic light emitting diodes(OLEDs)with dual co-host emitters have been simulated and *** consist of yellow-green emitting layer(EML)as electron transport layer(ETL)and blue EML as hole transport layer(HTL).Novelty of the device lies in simplification of tri-layer white OLED to a bi-layered device which is done by merging yellow-green EML with ETL and blue EML with *** simulated devices show Commission Internationale de L’Eclairage(CIE)colour coordinates well within the emission range of white *** results show that device A with 5,6,11,12-tetraphenylnaphthacene(rubrene)doped ETL has achieved the lowest luminance but longest excited state *** D with tris-(8-hydroxyquinoline)aluminum:4-(dicyanomethylene)-2-t-butyle-6-(1,1,7,7-tetra-methyljulolidyl-9-enyl)4 H-pyran(Alq3:DCJTB)as ETL which emits yellow light and 2,7-bis[N,N-bis(4-methoxy-phenyl)amino]-9,9-spirobifluorene(MS-TPD):bis(2-methyl-8-quninolinato)-4-phenylphenolate alu-minium(BAlq)as HTL which is responsible for blue light emission is found to have best characteristics when compared to other simulated *** has a maximum luminance of 10000 cd/m2 and current efficiency of 15.25 cd/A,respectively,and CIE coordinates are at(0.329,0.319).The device is found to be compatible to be used in solid state lighting applications because of the low driving voltage of the device.

关键词： emitter diodes white

Automatic route planning for GPS art generation

在线全文

学校读者我要写书评

暂无评论

Computational Visual Media 2019年第3期5卷 303-310页

作者： Andre Waschk Jens krüger University of Duisburg-Essen

In this paper, we present a novel approach to automated route generation of global positioning system(GPS) artwork. The term GPS artwork describes the generation of drawings by leaving virtual traces on digital maps. Until now, the creation of these images has required a manual planning phase in which an artist designs the route by hand. Once the route for this artwork has been planned, GPS devices have been used to track the movement. Using our solution, the lengthy planning phase can be significantly shortened,thereby opening art creation to a broader public.

关键词： GPS art walking routing shape detection navigation

Configuration-Sensitive Molecular Sensing on Doped Graphene Sheets

在线全文

学校读者我要写书评

暂无评论

Nano Research 2010年第7期3卷 472-480页

作者： John Russell Petr král Department of Chemistry University of Illinois at ChicagoChicagoIL 60607USA

We show by molecular dynamics simulations that configuration-sensitive molecular spectroscopy can be realized on optimally doped graphene sheets vibrated by an oscillatory electric *** selectivity of the spectroscopy is achieved by maximizing Coulombic binding between the detected molecule and a specific nest,formed for this molecule on the graphene sheet by substituting selected carbon atoms with boron and nitrogen *** can detect binding of different isomers to the nest from the frequency shifts of selected vibrational modes of the combined *** an illustrative example,we simulate detection of hexanitrostilbene enantiomers in chiral nests formed on graphene.

关键词： Molecular sensing enantiomer graphene functionalization molecular dynamics

Analyzing hydro abrasive erosion in Kaplan turbine:A case study from India

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 Hydrodynamics 2016年第5期28卷 863-872页

作者： Anant kr.RAI Arun KUMAR Alternate Hydro Energy Centre IIT Roorkee

Sediment flow through hydro turbine causes erosion of hydraulic components resulting in drop of turbine efficiency, parti- cularly in hydropower plants of the Himalayan region. The measurement of erosion and monitoring of sediment flow in turbine are major concerns in erosion study. Attempts have been made to study erosion mainly in Pelton and Francis turbines. In this study, a simple and effective method has been presented to measure erosion in a Kaplan turbine of a run-of-river scheme Chilla hydropower plant in foothills of Himalaya. Recent techniques were used to measure sediment parameters like concentration, size, shape and mineral content. A standard erosion model is applied to estimate the erosion in Kaplan turbine blade, runner chamber and draft tube cone. A calibration factor has been proposed to apply the erosion model for site specific conditions. It has been found that the outer trailing edges of the turbine blade and upper rtmner chamber are most erosion prone zones. Sediment analysis revealed that effective operation can reduce erosion in turbine components. The estimated erosion values from model are found to be consistent with measu- red values. Finally, suggestions for design improvements and effective operation of erosion affected hydropower plants are given.

关键词： turbine sediment erosion measurement IEC 62364 hydropower

IRFs as competing pioneers in T-cell differentiation

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2017年第8期14卷 649-651页

作者： Andrea kröger Institute for Medical Microbiology Molecular MicrobiologyOtto-von-Guericke University of MagdeburgMagdeburg D-39120Germany

CD4-expressing T lymphocytes are among of the best-characterized immune system cells.1 They develop in the thymus and acquire the potential to differentiate into distinct *** leaving the thymus,T helper cells further ... 详细信息

关键词： lymphocytes expressing pioneer

Supersonic Shock Wave with Landau Quantization in a Relativistic Degenerate Plasma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2020年第1期37卷 34-38页

作者： M.kr.Deka A.N.Dev Department of Applied Sciences Gauhati UniversityGuwahati-781014AssamIndia Center for Applied Mathematics and Computing Siksha O Anusandhan(Deemed to be University)Bh u baneswar-751030OdishaIndia

A three-dimensional(3D)BurgersJ equation adopting perturbative methodology is derived to study the evolution of a shock wave with Landau quantized magnetic field in relativistic quantum *** characteristics of a shock wave in such a plasma under the influence of magnetic quantization,relativistic parameter and degenerate electron density are studied with assistance of steady state *** magnetic field has a noteworthy control,especially on the shock wave's amplitude in the lower range of the electron density,whereas the amplitude in the higher range of the electron density reduces *** rate of increase of shock wave potential is much higher(lower)with a magnetic Held in the lower(higher)range of electron *** the relativistic factor,the shock wave's amplitude increases significantly and the rate of increase is higher(lower)for lower(higher)electron *** combined effect of the increase of relativistic factor and the magnetic field on the strength of the shock wave,results in the highest value of the wave potential in the lower range of the degenerate electron density.

关键词： density. solution. relativistic

Structural and spectroscopic diagnosis of ZnO/SnO_2 nanocomposite influenced by Eu^(3+)

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2015年第8期33卷 805-813页

作者： Pankaj kr.Baitha J.Manam Department of Applied Physics Indian School of Mines

Europium doped ZnO/SnO2 nanocomposite phosphors were synthesized via room temperature co-precipitation method. In this work structural changes, optical properties and the associated photoluminescence response were investigated for different compositions of ZnO and SnO2 activated with Eu3＋ ions. The prepared samples were systematically characterized by means of X-ray diffraction （XRD）, Fourier transform infrared spectroscopy （FTIR）, field emission scanning electron microscopy for obtaining the structural information about the prepared materials. Diffuse reflectance （DR） UV-Vis spectrometer and photoluminescence （PL） spectroscopy technique were employed for studying the optical properties of prepared materials. XRD results confirmed the presence of both phases, hexagonal ZnO as well as tetragonal SnO2 simultaneously and further using Debye Scherrer＇s and Hall-Williamson relations, crystallite size were estimated and it was found to be in the range of 8-14 nm. The FTIR studies revealed the presence of different stretching and bending modes of Zn-O and Sn-O with an additional stretching and bending vibration of absorbed water （O-H） molecules. FESEM images suggested that the particle size lied in the range of 50 to 70 nm, which were almost spherical in shapes. A long range multi colour emission from blue to red region was observed for the 320 nm excitation wavelength. The observed emission involved sharp emission due to 5D0→7F1 transition that corresponded to the magnetic dipole transition. The study showed that the Eu3＋ doped nanocomposite was more suitable material than singly Eu3＋ doped ZnO and Eu3＋ doped SnO2 with enhanced opto-eleetronic and luminescence properties and potential applications in display devices.

关键词： ZnO/SnO2 nanocomposite europium doping photoluminescence co-precipitation rare earths

Artificial sweetener sucralose: a possible modulator of autoimmune diseases

在线全文

学校读者我要写书评

暂无评论

Signal Transduction and Targeted Therapy 2023年第11期8卷 5123-5125页

作者： Nicolle kränkel Ursula Rauch-kroehnert Deutsches Herzzentrum der Charité Klinik für KardiologieAngiologie und IntensivmedizinCampus Benjamin-Franklin(CBF)12203BerlinGermany DZHK(German Centre for Cardiovascular Research) Partner site BerlinBerlinGermany Friede Springer—Centre of Cardiovascular Prevention@Charité Charité—University Medicine BerlinBerlinGermany

In their research article in Nature in March 2023,Fabio Zani and colleagues reported that high concentrations of the zero-calorie artificial sweetener sucralose affected the proliferation and differentiation of T cells toward interferon-γ-producing subsets,with no effect observed for B cells and myeloid cells.1 The publication has raised high hopes in the lay press on a widely available cure for patients suffering from autoimmune diseases.

关键词： autoimmune interferon diseases

An Effective Feature Generation and Selection Approach for Lymph Disease Recognition

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2021年第11期129卷 567-594页

作者： Sunil kr.Jha Zulfiqar Ahmad School of Computer and Software Nanjing University of Information Science and TechnologyNanjing210044China Institute of Hydrobiology Chinese Academy of SciencesWuhan430072China

Health care data mining is noteworthy in disease diagnosis and recognition *** exist several potentials to further improve the performance of machine learning based-classification methods in healthcare data *** selection of a substantial subset of features is one of the feasible approaches to achieve improved recognition results of classification methods in disease diagnosis *** the present study,a novel combined approach of feature generation using latent semantic analysis(LSA)and selection using ranker search(RAS)has been proposed to improve the performance of classification methods in lymph disease diagnosis *** performance of the proposed combined approach(LSA-RAS)for feature generation and selection is validated using three function-based and two tree-based classification *** performance of the LSA-RAS selected features is compared with the original attributes and other subsets of attributes and features chosen by nine different attributes and features selection approaches in the analysis of a most widely used benchmark and open access lymph disease *** LSA-RAS selected features improve the recognition accuracy of the classification methods significantly in the diagnosis prediction of the lymph *** tree-based classification methods have better recognition accuracy than the function-based classification *** best performance(recognition accuracy of 93.91%)is achieved for the logistic model tree(LMT)classification method using the feature subset generated by the proposed combined approach(LSA-RAS).

关键词： Disease data mining feature selection classification lymph diagnosis