检索结果-南通市图书馆

Production of TiO_2 from CaTiO_3 by alkaline roasting method

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2010年第2期29卷 162-167页

CaTiO3 was decomposed by alkaline roasting method for the production of *** process included alkaline roasting, water leaching and acid leaching *** the alkaline roasting step, the factors such as roasting temperature and NaOH/CaTiO3 molar ratio were investigated and 99.5% TiO2 could be extracted from *** addition, it is believed that only ion-exchange between Ca2＋ and Na＋ takes place, while the structure of TiO 32-in CaTiO3 was not destroyed during the roasting *** the acid leaching step, Ca（OH）2 could be completely leached at pH = 6-7 and Na2TiO3 was completely hydrolyzed *** crystal structure of the leached sample seemed to be affected by pH and sequent calcination ***, a flowsheet was proposed for the extraction of TiO2 from perovskite.

关键词： titanium dioxide roasting perovskite acid leaching

Scallop ice shape characteristics of swept wing based on large-scale icing wind tunnel experiment

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2023年第12期36卷 214-230页

作者： Qiang wang Ningli CHEN yuanbo wang Weihao LI Yu LIU Xian YI Low Speed Aerodynamics Institute China Aerodynamics Research and Development CenterMianyang 621000China Anti/de-icing Key Laboratory of China Aerodynamics Research and Development Center Mianyang 621000China Key Laboratory of Aerodynamics Mianyang 621000China Design and Research Institute of AVIC Shaanxi Aircraft Industry Group Hanzhong 723000China

Scallop ice is a special phenomenon that occurs during swept wing aircraft passing through icing *** poses a great challenge for the icing safety assessment that the complex scallop ice shape feature and its mechanism are still *** this work,a large-scale icing wind tunnel experiment of swept wing designed by NACA0012 airfoil is conducted in the Icing Wind Tunnel of China Aerodynamics Research and Development *** detailed three-dimensional ice shapes under 0°,15°,30°and 45°swept angles are obtained by laser scanning *** experimental results show that with the swept angle increasing from 0°to 45°,the 2D double ice horn structures show certain spanwise variation,and finally transform into complete scallop ice with ice thickness greatly enhanced in the stagnation line *** empirical mode decomposition of the spanwise ice curve captures the high-frequency fluctuation on the scallop ice caused by the small-scale roughness element,while the trend with low frequency is not *** on the experimental data,a new complete scallop ice geometric model,named 5Points-5Lines-2Arcs(5P-5L-2A)model,is proposed,which can provide important basis for the quantitative description of complex scallop ice shape.

关键词： Aircraft Swept wings Scallop ice Icing wind tunnel experi-ment Scallop ice geometric model

Lightweight Body-In-White Design Driven by Optimization Technology

在线全文

学校读者我要写书评

暂无评论

Automotive Innovation 2018年第3期1卷 255-262页

作者： Heguo Ou Xiaodong Tang Jieping Xiao yuanbo wang Zhongmin Ma Off-Road Vehicle R&D Beijing Automotive Industry CorporationNo.99 Shuanghe StreetShunyi DistrictBeijingChina

Structural optimization technologies are increasingly applied to lightweight automotive structural *** a body-inwhite(BIW)development project,optimization technologies are applied in three steps that are seamlessly integrated into engineering *** following a design-driven approach,an innovative design that was 50.65 kg lighter than the base design was ***,topology optimization was used to investigate the optimal material distribution in a given design space,and helped in extracting the main load path,while considering crashworthiness,NVH,and static stiffness performance *** the second step,the effective design of a beam cross-section and feasible joints was carried out based on optimization technology and expert *** this step,the deep involvement of manufacturing process experts on stamping and joint connection feasibility analysis increased the chance of success *** sensitivity analysis,topography optimization,and gauge optimization of the created draft 3D BIW frame comprised the last step before finalizing the initial *** new design was validated by full load case simulations,including full vehicle crashworthiness analysis,mode frequency,and body mount point dynamic stiffness analysis,and BIW stiffness and component attachment stiffness *** validation results indicate that the new BIW design achieves the performance goal,while being 13.3%lighter than the base design.

关键词： BIW design Lightweight design Structural optimization Optimization technology

High efficiency dual-band filtering power amplifier

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

Science China(Information Sciences) 2022年第8期65卷 293-294页

作者： Yuanchun LI yuanbo wang Disi WU Runze ZHAN Shichang CHEN Quan XUE School of Electronics and Information Engineering South China University of Technology School of Electronics and Information Engineering Hangzhou Dianzi University Intelligent Sensing and Wireless Transmission Center Pazhou Laboratory

Dear editor,In the past decades, filtering power amplifiers(PAs) have attracted much attention due to the integration of PA and filter and the potential for overall performance improvement. Nevertheless, all the repor...

关键词：

同方期刊数据库

Ti2AlC triggered in-situ ultrafine TiC/Inconel 718 composites:Microstructure and enhanced properties

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第16期47卷 70-78页

作者： Wenqiang Hu Zhenying Huang Qun Yu yuanbo wang Yidan Jiao Cong Lei Leping Cai Hongxiang Zhai Yang Zhou Institute of Materials Science and Engineering School of Mechanical and Electronic Control EngineeringBeijing Jiaotong UniversityBeijing100044China Key Laboratory of Vehicle Advanced Manufacturing Measuring and Control Technology(Beijing Jiaotong University)Ministry of EducationBeijing100044China

In situ ultrafine TiC dispersion reinforced Inconel 718 alloy with enhanced mechanical properties was fabricated by the technique of reactive hot-press sintering Ti2AlC and In718 *** effect of Ti2AlC precursor additions(5 vol.%,10 vol.%,15 vol.%)on microstructure and mechanical properties of TiC/In718 composites were investigated.A relationship of microstructural characteristics,room and elevated temperature mechanical performance,and underlying strengthening mechanisms were *** results show that initial Ti2AlC precursor transformed completely into ultrafine TiC particulate(~230 nm)and distributed uniformly in the matrix after sintering 5 and 10 vol.%Ti2AlC/***,TiC particulates tended to aggregate to stripes with the addition of Ti2AlC up to 15 vol.%,which,in adverse,weaken the properties of *** 5 vol.%Ti2AlC/In718 sample showed a higher tensile strength of 1404±13 MPa with a noticeable elongation of 9.8%at room temperature compared to the pure In718(ultimate tensile strength(UTS)=1310 MPa,elongation=21.5%).At 600℃,700℃,800℃and 900℃,tensile strength of the as-sintered 5 vol.%Ti2AlC/In718 composite was determined to be 1333±13 MPa,1010±10 MPa,685±25 MPa and 276±3 MPa,increased by 9.2%,14.6%,14.2%and 55%,respectively,compared with that of monolithic In718 *** excellent tensile properties of TiC/In718 composite can be ascribed to the combined mechanisms in term of increased dislocation density,dispersive Orowan and load transfer mechanisms.

关键词： Inconel 718 TiC reinforcement Ti2AlC High temperature properties Tensile strength

New insights into effects of Kaixin Powder on depression via lipid metabolism related adiponectin signaling pathway

在线全文

学校读者我要写书评

暂无评论

Chinese Herbal Medicines 2023年第2期15卷 240-250页

作者： Wenshan Yang Hong Yin Yichen wang yuanbo wang Xia Li Chaochen wang Ping Liu Yuan Hu Department of Pharmacy Medical Supplies Center of PLA General HospitalChinese PLA General HospitalBeijing 100853China Pharmacy Care Center Medical Supplies Center of PLA General HospitalChinese PLA General HospitalBeijing 100853China Chinese PLA Medical School Chinese PLA General HospitalBeijing 100853China Department of Outpatient Group 82 Military HospitalBaoding 071000China

Objective:To clarify the anti-depressive potential mechanisms of Kaixin Powder(KP),a drug that helps to prevent and treat depression and other mentaldiseases,from genome-wide transcriptome ***:Transcriptome and KEGG pathway analysis were conducted on the hippocampus of depressed rats,then the differentially expressed genes were validated and serum concentration of lipid parameters were identified by enzymatic ***,high-fat diets induced depression-like behaviors in Syrian golden hamsters were conducted to verify the predicted molecular mechanisms acquired from the transcriptome ***:Transcriptome results revealed that the 24 differentially expressed genes(DEGs)in chronic mild stress(CMS)rats could be reversed after two weeks of KP *** mechanisms of KP in treating depression firstly involved the regulation of several pathology modules,including lipid metabolism,synapse function and *** could regulate imbalances of lipid homeostasis in high-fat diet induced depressive ***,it was validated that cholesterol metabolism dysfunction can be ameliorated by KP,which was correlated with upregulation of the AdipoR1-BDNF(brainderived neurotrophic factor)co-regulatory ***:Taken together,our results demonstrated that KP not only alleviates depression via traditional mental illness targets,but it may also simulates the cholesterol metabolism and adiponectin signaling with multi-target characteristics.

关键词： adiponectin cholesterol homeostasis depression high-fat diet Kaixin Powder transcriptome analysis

Types of Mining Heritage in Jinzhou Gold Mine,Weihai,Shandong and its Evaluation

在线全文

学校读者我要写书评

暂无评论

Types of Mining Heritage in Jinzhou Gold Mine,Weihai,Shandon...

机车综合无线通信设备在无线网络安全监测中的应用

作者： yuanbo wang Xiaowei wang Hongmei LIU Shandong Geological Environment Monitoring Center

Mining heritages are historical evidence of human mining activities,historical and cultural relics of great value,and an important part of the world’s natural and cultural *** paper introduces and classifies the types of mining heritage resources in Jinzhou Gold Mine in Weihai,Shandong Province,and evaluates them from perspectives of natural attributes,scientific values and economic values.

关键词： Weihai Jinzhou mining heritage,type of resources,evaluation

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

中国安全科学学报 2021年第S1期31卷 109-113页

作者：王远波朔黄铁路发展有限责任公司河北肃宁062350

针对目前网络监测自动化程度低、监测样本少、无法直接监测在网运行设备等问题,以朔黄铁路为例,提出一种基于机车综合无线通信设备(CIR)的网络监测方法,在不影响现有设备工作前提下,实时性采集设备标识、位置信息和无线指标等数据;构建... 详细信息

针对目前网络监测自动化程度低、监测样本少、无法直接监测在网运行设备等问题,以朔黄铁路为例,提出一种基于机车综合无线通信设备(CIR)的网络监测方法,在不影响现有设备工作前提下,实时性采集设备标识、位置信息和无线指标等数据;构建网络质量综合智能分析平台,采用胶囊化和地理信息可视化技术从网络和设备2个维度智能分析监测数据。研究结果表明:所提方法实现全线总计100对列车运用设备的在线监测,网络监测分析的周期由1个月缩短为1天;替代传统的人工分析,使用数据胶囊化等先进技术简化大数据分析的过程和运算负荷,可全面提升网络监测工作质量。

关键词：机车综合无线通信设备(CIR) 网络监测铁路长期演进(LTE-R) 胶囊化智能分析

在线全文

学校读者我要写书评

暂无评论

水平轴风力机多涡格升力面涡尾迹法的研究

哈尔滨工程大学学报 2016年第8期37卷 1070-1075页

作者：王渊博李春栾忠骏上海理工大学能源与动力工程学院上海200093 上海市动力工程多相流与传热重点实验室上海200093

针对NREL Phase VI实验双叶片水平轴风力机,采用基于多涡格升力面的自由尾迹法模拟其低风速及高风速气动性能。由于高风速失速延迟导致尾缘分离滞后,建立Kirchhoff-Helmholz尾缘分离预估模型与Du-Selig失速延迟模型耦合的三维尾缘分离... 详细信息

针对NREL Phase VI实验双叶片水平轴风力机,采用基于多涡格升力面的自由尾迹法模拟其低风速及高风速气动性能。由于高风速失速延迟导致尾缘分离滞后,建立Kirchhoff-Helmholz尾缘分离预估模型与Du-Selig失速延迟模型耦合的三维尾缘分离预估模型。计算低风速及高风速不同的偏航角工况,对比分析不同涡格数对模拟结果的影响。研究结果表明:涡格数对低风速工况影响甚小,对高风速影响很大,且采用两涡格的三维尾缘分离预估模型对法向力系数和弦向力系数的模拟最为精确。

关键词：水平轴风力机多涡格升力面自由涡尾迹涡格数偏航失速延迟尾缘分离