检索结果-南通市图书馆

International Journal of Minerals,Metallurgy and Materials 2018年第11期25卷 1286-1293页

作者： Qing-dong Qin Jin-bo Qu Yong-e Hu Yu-jiao Wu Xiang-dong Su Key Laboratory of Light Metal Materials Processing technology of Guizhou Province Guizhou Institute of TechnologyGuiyang 550003China Department of Materials&Metallurgy engineering Guizhou Institute of TechnologyGuiyang 550003China Merchant Marine co.lege Shanghai Maritime UniversityShanghai 201306China 2011 Special Functional Materials co.laborative Innovation Center of Guizhou Province Guiyang 550003China

co.rCuFeNi–TiO was prepared by arc melting of the pure elements and Ti_2co.powder under an Ar atmosphere. Both co.rCuFe Ni and co.rCuFeNi–TiO alloys are co.posed of a face-centered cubic(fcc) solid solution, whereas the alloys of co.rCuFeNi–TiO are basically co.posed of an fcc solid solution and TiO crystals. The microstructures of co.rCuFeNi–TiO are identified as dendrite and interdendrite structures such as co.rCuFeNi. The morphology of TiO is identified as an equiaxed crystal with a small amount of added Ti_2co. By increasing the amount of Ti_2co.added, the TiO co.tent was dramatically increased and part of the equiaxed crystals changed to a dendrite structure. A test of the oxidation resistance demonstrates that the oxidation resistance of co.rCuFeNi–TiO is better than that of co.rCu Fe Ni. However, as the TiO co.tent increases further, a co.responding decrease is observed in the oxidation resistance.

关键词： multico.ponent equiatomic high-entropy alloys microstructure oxidation resistance

The synergistic role of Ti microparticles and CeO_(2) nanoparticles in tailoring microstructures and properties of high-quality Ni matrix nanoco.posite co.ting

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & technology 2022年第10期105卷 182-193页

作者： Lianbo Wang Shilong Xing Zizhen Shen Huabing Liu Chuanhai Jiang Vincent Ji Yuantao Zhao School of Materials Science and engineering Shanghai Jiao Tong UniversityShanghai 200240China ICMMO/SP2M Universite Paris-SaclayOrsay 91405France Zhejiang Scientific Research Institute of Transport Hangzhou 310023China Merchant Marine co.lege Shanghai Maritime UniversityShanghai 201306China

In current work,Ni-Ti-CeO_(2) nanoco.posite co.tings were achieved by co.adding Ti microparticles and CeO_(2) *** experiments and co.SOL co.puter simulation were applied to reveal the synergistic role of Ti microparticles and CeO_(2) nanoparticles in tailoring the spatial microstructures and properties of Ni-Ti-CeO_(2) nanoco.posite ***,the co.ductive Ti microparticles co.ducted the growth behavior of Ni grains by current density co.centration,distorting electronic feld lines and heterogeneous *** domains co.sisting of inner nanograins and outer radial co.umnar grains surrounded Ti microparticles,where Ti microparticles acted as *** microparticles tended to be aggregated,leading to spatial heterogeneity of *** deposits buried the Ti microparticles in forms of“co.ering model”,co.tributing to the formation of inside voids and rough surface and aggregation of Ti microparticles;on the other hand,the non-co.ductive CeO_(2)microparticles hardly changed the distribution of current density and electronic feld lines on the cathode *** deposits buried the CeO_(2)microparticle in forms of“stacking model”,avoiding the inside voids and aggregation of *** inco.poration of CeO_(2)microparticle brought in microstructure evolutions only on its top side without disturbing the growth behavior of Ni grains on its lateral side or bottom,suggesting the limited *** was co.related with the presence of current co.centration above the CeO_(2) microparticle at the last stage of burying CeO_(2) *** co.addition of Ti microparticles and CeO_(2) nanoparticles into Ni deposits exploited the co.plementary action of the two particles,which gave birth to satisfed spatial microstructures and improved *** microparticles took major responsibility for microstructure evolutions,while the CeO_(2) nanoparticles were mainly in charge of the microstructure homogeneity.

关键词： Nanoco.posite co.ting CeO_(2)nanoparticle Ti microparticles Grain growth behavior co.SOL co.puter simulation Spatial microstructure and spatial hardness

SAR-LtYOLOv8:A Lightweight YOLOv8 Model for Small Object Detection in SAR Ship Images

在线全文

学校读者我要写书评

暂无评论

co.puter Systems Science & engineering 2024年第6期48卷 1723-1748页

作者： co.ghao Niu Dezhi Han Bing Han Zhongdai Wu School of Information engineering Shanghai Maritime UniversityShanghai201306China shanghai Ship and Shipping Research Institute co. Ltd.Shanghai200135China

The high co.erage and all-weather capabilities of Synthetic Aperture Radar(SAR)image ship detection make it a widely accepted method for maritime ship positioning and ***,SAR ship detection faces challenges such as indistinct ship co.tours,low resolution,multi-scale features,noise,and co.plex background *** paper proposes a lightweight YOLOv8 model for small object detection in SAR ship images,inco.porating key structures to enhance *** YOLOv8 backbone is replaced by the Slim Backbone(SB),and the Delete Medium-sized Detection Head(DMDH)structure is eliminated to co.centrate on shallow *** adjusting the co.volution kernel weights of the Omni-Dimensional Dynamic co.volution(ODco.v)module can result in a reduction in co.putation and enhanced *** the model’s receptive field is done by the Large Selective Kernel Network(LSKNet)module,which captures shallow ***,a Multi-scale Spatial-Channel Attention(MSCA)module addresses multi-scale ship feature differences,enhancing feature fusion and local region *** results on the HRSID and SSDD datasets demonstrate the model’s effectiveness,with a 67.8%reduction in parameters,a 3.4%improvement in AP(average precision)@0.5,and a 5.4%improvement in AP@0.5:0.95 on the HRSID dataset,and a 0.5%improvement in AP@0.5 and 1.7%in AP@0.5:0.95 on the SSDD dataset,surpassing other state-of-the-art methods.

关键词： SAR ship detection MSCA deep learning

Impacts of CaO Solid Particles in Carbon Dioxide Absorption Process from Ship Emission with NaOH Solution

维普期刊数据库评论

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 shanghai Jiaotong university(Science) 2018年第2期23卷 320-326页

作者： WANG Zhongcheng LIU Xiaoyu ZHOU Peilin XU Leping Merchant Marine co.lege Shanghai Maritime University Shanghai 201306 China Naval Architecture Ocean and Marine engineering co.lege University of Strathclyde Glasgow G11XQ UK

co.2 emitted from ship exhaust is one of the major sources of atmospheric pollution. In order to reduce ship co.2 emissions, this paper co.es up with the idea of reco.ering co.2 from ship exhaust by Na OH solution and improves the absorption rate by adding Ca O solid particles. The effect mechanism of Ca O solid particles on co.2 absorption efficiency is analyzed in detail, and the mathematical model is deduced and the Ca O enhancement factor is calculated through experiments. Experiment result demonstrates that the effect of CaO solid particles on the absorption of co.2 in alkali solution is significant. The absorption rate of pure co.2 gas,the simulated ship exhaust gas and 6135 AZG marine diesel engine emission can be increased by 10%, 15.85% and10.30%, respectively. So it can be seen that CaO solid particles play an important role in improving the absorption efficiency of ship co.2 emission.

关键词： environmental protection diesel emissions co. absorption CaO particulate matter enhancement factor

在线全文

学校读者我要写书评

暂无评论

生物柴油在船用低速机上的燃烧分析研究

哈尔滨工程大学学报（英文版） 2023年第4期22卷 861-869页

作者：魏存锋江国和崔磊吴刚钟莎莎 Merchant Marine co.lege Shanghai Maritime UniversityShanghai 201306China China Shipbuilding Power engineering Institute co. Ltd.Shanghai 201206China

To study the applicability of biodiesel in marine engines,this research investigated the performance,co.bustion characteristics,and emission characteristics of biodiesel(B100),diesel,and a 50%volume blend of the two fuels(B50)in a marine *** study was co.ducted on a 4-cylinder,520 mm-bore,two-stroke,low-speed marine engine with a co.mon rail fuel and exhaust gas charge *** three fuels were tested at different loads from 25%–100%with a step size of 25%.Results showed that the fuel co.sumption of pure biodiesel increased by about 13.5%and 3.8%relative to that of diesel at 25%and 100%loads,respectively,and by about 6%at 50%and 75%***-cylinder co.bustion pressure was slightly reduced when the engine ran on biofuel,and black carbon emissions from biodiesel were reduced by an average of 54.7%.co.pared with those from diesel,the carbon co.and total hydrocarbon emissions from B100 were reduced by 11.3%and 39%,*** emissions were elevated for B100 and B50 under all loading *** properties of B50 blended diesel lie between those of B100 and *** terms of co.bustion characteristics and emissions,biodiesel can be used without changing the engine parameters and can effectively reduce pollution,such as black carbon and carbon monoxide.

关键词： Low-speed engines Emissions Biodiesel Black carbon Low-carbon fuels

Study of the effect of chemical co.position on the surface wettability of three-dimensional graphene foams

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第7期31卷 1839-1842页

作者： Guihua Huang Xinhong Song Yiying Chen Fangyuan Lin Yipeng Huang Feiming Li Zhiyong Guo Qiuhong Yao Xi Chen Institute of Analytical technology and Smart Instruments College of Environment and Public HealthXiamenHuaxia UniversityXiamen 361024China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361005China co.lege of Ocean Science and engineering.shanghai maritime University Shanghai 201306China

The chemical co.position obviously affects the surface wettability of a three-dimensional(3D)graphene material apart from its surface energy and *** the hydrothermal preparation,the heteroatom doping changes the chemical co.position and wettability of the 3D graphene *** realize the co.trollable surface wettability of graphene materials,aminobenzene sulfonic acid(ABSA)was selected as a typical doping agent for the preparation of nitrogen and sulfur co.doped 3D graphene foam(SNGF)using a hydrothermal *** from using o-ABSA or p-ABSA as the dopant,SNGF with tunable surface wettability is obtained only when m-ABSA is *** result indicates that the substituent position of-SO3H group in the benzene ring of ABSA is rather important for the tunable *** work provides some theo retical foundations for dopant selection and some new insights in manipulating the properties of 3D graphene foams by adjusting the co.figuration of dopants.

关键词： 3D graphene foam Surface wettability Dopant co.figuration Chemical co.position Aminobenzene sulfonic acid

Field Investigation and co.parison Analysis of Low-Grade Heat Pump Technologies in Building Space Heating Projects

在线全文

学校读者我要写书评

暂无评论

Energy engineering 2022年第1期119卷 63-81页

作者： Yanxue Li Weijun Gao Xiaoyi Zhang Wenya Xu Yingjun Ruan Yinzhong Wang Innovation Institute for Sustainable maritime Architecture Research and technology Qingdao University of TechnologyQingdao266033China Faculty of Environmental engineering The University of KitakyushuKitakyushu808-0135Japan Institute of Mechanical engineering Tongji UniversityShanghai200092China Dongying Electric Power co.pany Dongying257000China

The building sector co.tributes a large ratio of final energy co.sumption,and improving building energy efficiency is expected to play a significant role in mitigating its carbon dioxide ***,we co.lected the on-site measurement data to investigate the techno-eco.omic performances of different heat pump types that exist in building space heating projects in Qingdao,*** in-depth analysis revealed the temperature variations of measured low-grade heat sources over the whole heating supply period,and urban sewage water shows high stable heat energy quality co.pared with seawater and geothermal heat *** behaviors including cycling inlet and outlet temperature of the selected heat pumps were illustrated,and analysis evaluated detailed effects of operational parameters on energy efficiency *** the relationship between co.s distributions of heat pumps and operational co.ditions was examined further,and the positive effect of the rising temperature of heat sources on energy efficiency improvement of heat pump is highlighted when the heating supply temperature is ***,we analyzed the eco.omic and carbon emission performance of the heat pump system,and results show that electricity price plays a vital role in the lifespan energy co.t saving potential,and the heat pump co.ld serve as a promising approach in reducing co.(2) related to the building space ***,we reco.mended suggestions for improving the overall energy efficiency and co.t co.petitiveness of decentralized heat pump systems for building space heating.

关键词： On-site measurement heat pumps heating supply operational performance

Advanced Face Mask Detection Model Using Hybrid Dilation co.volution Based Method

维普期刊数据库评论

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 Software engineering and Applications 2023年第1期16卷 1-19页

作者： Shaohan Wang Xiangyu Wang Xin Guo shanghai Ship and Shipping Research Institute Shanghai China School of Naval Architecture Ocean & Civil Engineering Shanghai Jiao Tong University Shanghai China co.co.SHIPPING technology co. Ltd. Shanghai China Marine Traffic Safety and Application Laboratory College of Merchant Marine Shanghai Maritime University Shanghai China

A face-mask object detection model inco.porating hybrid dilation co.volutional network termed ResNet Hybrid-dilation-co.volution Face-mask-detector (RHF) is proposed in this paper. Furthermore, a lightweight face-mask dataset named Light Masked Face Dataset (LMFD) and a medium-sized face-mask dataset named Masked Face Dataset (MFD) with data augmentation methods applied is also co.structed in this paper. The hybrid dilation co.volutional network is able to expand the perception of the co.volutional kernel without co.cern about the disco.tinuity of image information during the co.volution process. For the given two datasets being co.structed above, the trained models are significantly optimized in terms of detection performance, training time, and other related metrics. By using the MFD dataset of 55,905 images, the RHF model requires roughly 10 hours less training time co.pared to ResNet50 with better detection results with mAP of 93.45%.

关键词： Face Mask Detection Object Detection Hybrid Dilation co.volution co.puter Vision

A Solution Processable Flexible Transparent co.ductive Graphene/PEDOT : PSS Film Fabricated by Spin and Blade co.ting

维普期刊数据库评论

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 shanghai Jiaotong university(Science) 2018年第1期23卷 106-111页

作者：房霄竹范志君顾宜宸史佳雯陈敏陈学文邱韶华 ZABIHI Fatemeh ESLAMIAN Morteza 陈倩栎 University of Michigan-shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University Shenzhen SAPO Photoelectric co. Ltd. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University State Key Laboratory for co.posite Materials School of Materials Science and Engineering Shanghai Jiao Tong University

Flexible transparent co.ductive films were made on PET substrates by spin and blade co.ting, using graphene sheets dispersed in PEDOT : PSS solution. Ultrasonic substrate vibration was used to improve microstructure and properties of the films. co.paring to the pristine PEDOT : PSS film, the sheet resistance is 3 to 4 orders of magnitude lower with the addition of graphene. The co.ductivity and reproducibility of the film are improved for two-layer films co.paring to one-layer films, with a reduction in transparency. Films prepared with substrate vibration showed lower sheet resistance for one-layer films, as the size of dewetting areas is reduced. In addition, large-area flexible films with desirable co.ductivity and transmittance were successfully fabricated by blade co.ting, which is promising, as the process is low-co.t, scalable and co.patible with roll-to-roll manufacturing.

关键词： graphene PEDOT:PSS solution-processing blade co.ting ultrasonic substrate vibration

High-Resolution Projections of Mean and Extreme Precipitation over China by Two Regional Climate Models

在线全文

学校读者我要写书评

暂无评论

Journal of Meteorological Research 2020年第5期34卷 965-985页

作者： Zhiyu JIANG Zhan TIAN Guangtao DONG Laixiang SUN Peiqun ZHANG Erasmo BUONOMO Dongli FAN shanghai Institute of technology Shanghai 201400China shanghai Climate Center Shanghai Meteorological ServiceShanghai 200030China School of Environmental Science and engineering Southern University of Science and TechnologyShenzhen 518055China Key Laboratory of Cities'Mitigation and Adaptation to Climate Change in shanghai China Meteorological AdministrationShanghai 200030China Department of Geographical Sciences University of MarylandCollege ParkMD 20742USA School of Finance and Management School of Oriental and African Studies of University of LondonL ondon WC1H 0XGUK Beijing Climate Center/National Climate Center China Meteorological AdministrationBeijing 100081China Met Office Hadley Centre Exeter EX 13PBUK

In this study, we employ two regional climate models(RCMs or RegCMs), which are RegCM4 and PRECIS(Providing Regional Climates for Impact Studies), with a horizontal grid spacing of 25 km, to simulate the precipitation dynamics across China for the baseline climate of 1981–2010 and two future climates of 2031–2060 and 2061–2090. The global climate model(GCM)—Hadley Centre Global Environment Model version 2-Earth Systems(HadGEM2-ES) is used to drive the two RCMs. The results of baseline simulations show that the two RCMs can co.rect the obvious underestimation of light rain below 5 mm day^-1 and the overestimation of precipitation above 5 mm day^-1 in Northwest China and the Qinghai–Tibetan Plateau, as being produced by the driving GCM. While PRECIS outperforms RegCM4 in simulating annual precipitation and wet days in several sub-regions of Northwest China, its underperformance shows up in eastern China. For extreme precipitation, the two RCMs provide a more accurate simulation of co.tinuous wet days(CWD) with reduced biases and more realistic spatial patterns co.pared to their driving GCM. For other extreme precipitation indices, the RCM simulations show limited benefit except for an improved performance in some localized regions. The future projections of the two RCMs show an increase in the annual precipitation amount and the intensity of extreme precipitation events in most regions. Most areas of Southeast China will experience fewer number of wet days, especially in summer, but more precipitation per wet day(≥ 30 mm day^-1). By co.trast, number of wet days will increase in the Qinghai–Tibetan Plateau and some areas of northern China. The increase in both the maximum precipitation for five co.secutive days and the regional extreme precipitation will lead to a higher risk of increased flooding. The findings of this study can facilitate the efforts of climate service institutions and government agencies to improve climate services and to make climate-smart decisions

关键词： climate change extreme precipitation dynamical downscaling regional climate models(RCMs) co.rdinated Regional Downscaling Experiment(co.DEX)