检索结果-南通市图书馆

Chinese Journal of Chemistry 2021年第12期39卷 3285-3291页

作者： Jianxiao Li zidong lin Dan He Wanqing Wu Huanfeng Jianga Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhouGuangdong 510640China Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates South China University of TechnologyGuangzhouGuangdong 510640China

A novel and viable palladium-catalyzed sequential cyclization/functionalization of alkynone O-methyloximes with unactivated vinyl ethers under aerobic conditions was *** structure of the products could be successfully controlled by varying the nature of the substituents of the vinyl *** new approach provides a convenient and straightforward synthetic protocol for the preparation of structurally diverse 4-(1-alkoxyvinyl)-isoxazoles and 4-vinylisoxazoles in moderate to good yields with highly ***,this protocol can be performed on a gram scale,showing the promising application in synthetic and pharmaceutical chemistry.

关键词： Palladium Alkenes Alkynes Annulation Cross-coupling

Effect of Multiple Thermal Cycles on Microstructure and Mechanical Properties of Cu Modified Ti64 Thin Wall Fabricated by Wire-Arc Directed Energy Deposition

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

Acta Metallurgica Sinica(English Letters) 2024年第11期37卷 1875-1890页

作者： zidong lin Xuefeng Zhao Wei Ya Yan Li Zhen Sun Shiwei Han Xiaoyang Peng Xinghua Yu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing401120China RAMLAB BV Scheepsbouwweg 8 F63089JWRotterdamThe Netherlands Engineering Training Center Shandong UniversityJinan250061China Chongqing Tiema Industry Group Co. Ltd.Chongqing400050China

This study investigated the effect of thermal cycles on Cu-modified Ti64 thin-walled components deposited using the wire-arc directed energy deposition(wire-arc DED)*** the samples before and after experiencing thermal cycles,it was found that both microstructures consisted of priorβ,grain boundaryα(GBα),and basketweave structures containingα+β*** cycles realized the refinement ofαlaths,the coarsening of priorβgrains andβlaths,while the size and morphology of continuously distributed GBαremained *** residualβcontent was increased after thermal *** with the heat-treated sample with nanoscale Ti2Cu formed,short residence time in high temperature caused by the rapid cooling rate of thermal cycles restricted Ti2Cu *** formation of brittle Ti2Cu means that only grain refinement strengthening and solid-solution strengthening *** yield strength increased from 809.9 to 910.85 MPa(12.46%increase).Among them,the main contribution from solid solution strengthening(~51 MPa)was due to the elemental redistribution effect betweenαandβphases caused by thermal cycles through quantitative *** ultimate tensile strength increased from 918.5 to 974.22 MPa(6.1%increase),while fracture elongation increased from 6.78 to 10.66%(57.23%increase).Grain refinement ofαlaths,the promotedα′martensite decomposition,decreased aspect ratio,decreased Schmid factor,and local misorientation change ofαlaths are the main factors in improved ***,although the fracture modes of the samples in the top and middle regions are both brittle-ductile mixed fracture mode,the thermal cycles still contributed to an improvement in tensile ductility.

关键词： Wire-arc directed energy deposition(wire-arc DED) Ti64-1.2Cu thin wall Thermal cycles Microstructure variation Mechanical properties

Research on Crystal Orientation Evolvement of Continuously Unidirectionally Solidified Copper Rods during Working Process

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

稀有金属材料与工程 2011年第S3期40卷 216-219页

作者： Zhang Hong, Wang zidong, lin Guobiao, Chen Mingwen, Wang Shigang, Yuan Baolong University of Science and Technology Beijing, Beijing 100083, China Univ Sci & Technol Beijing Beijing 100083 Peoples R China

Copper rods with diameter of 17.0 mm have been fabricated by Continuous Unidirectional Solidification (CUS) process. The metallographic results show that the microstructures of the rods are longitudinal columnar crystals and the crystal sizes range roughly among 100-200 μm. The copper rod can be worked to ultra-fine wires 19.7 μm diameter at room temperature without any heat treatments, and the size of the microstructure of the wires obtains nanometer scale. During working process, the elongation multiple of the rod is as high as 740 000 and total deformation true strain over 13.5. The copper rod containing continuous columnar crystals has exhibited excellent cold elongation deformation ability. The results of the texture tests show that the rod has strong fiber texture. After worked at room temperature, texture variants of strong and less strong evolve in the copper wires. With increasing deformation level, the contour of fiber texture decreases while increases. The excellent cold elongation deformation ability and high strength of copper wires is considered to be a result of the strong fiber texture, work hardening and a small quantity of

关键词： copper continuous unidirectional solidification texture microstructure deformation

Hardware-efficient quantum principal component analysis for medical image recognition

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2024年第5期19卷 227-239页

作者： zidong lin Hongfeng Liu Kai Tang Yidai Liu Liangyu Che Xinyue Long Xiangyu Wang Yu-ang Fan Keyi Huang Xiaodong Yang Tao Xin Xinfang Nie Dawei Lu Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and TechnologyShenzhen 518055China Department of Physics Hong Kong University of Science and TechnologyClearWaterBayKowloonHong KongChina International Quantum Academy Shenzhen 518055China Guangdong Provincial Key Laboratory of Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Quantum Science Center of Guangdong-HongKong-Macao Greater Bay Area Shenzhen-HongKong International Science and Technology ParkNo.3 Binlang RoadFutian DistrictShenzhen 518045China

Principal component analysis(PCA)is a widely used tool in machine learning algorithms,but it can be computationally *** 2014,Lloyd,Mohseni&Rebentrost proposed a quantum PCA(qPCA)algorithm[***.10,631(2014)]that has not yet been experimentally demonstrated due to challenges in preparing multiple quantum state copies and implementing quantum phase *** this study,we presented a hardware-efficient approach for qPCA,utilizing an iterative approach that effectively resets the relevant qubits in a nuclear magnetic resonance(NMR)quantum ***,we introduced a quantum scattering circuit that efficiently determines the eigenvalues and eigenvectors(principal components).As an important application of PCA,we focused on classifying thoracic CT images from COVID-19 patients and achieved high accuracy in image classification using the qPCA circuit implemented on the NMR *** experiment highlights the potential of near-term quantum devices to accelerate qPCA,opening up new avenues for practical applications of quantum machine learning algorithms.

关键词： quantum simulation quantum principal component analysis nuclear magnetic resonance

UG Programming Development and Digital Design of Globoidal Indexing CAM Mechanism

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

International Journal of Plant Engineering and Management 2020年第3期25卷 144-162页

作者： LUO Kang HE Xueming WU Jia LU Lixin lin zidong Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology Jiangnan University Jiangsu Wuxi 214122 China School of Mechanical Engineering Jiangnan University Jiangsu Wuxi 214122 China Shandong Bihai Packaging Materials Co. Ltd. Shandong Linyi 276600 China

In the design process of globoidal CAM mechanism,there are some shortcomings such as long structure design cycle,low efficiency,and no modification flexibility of parameters of similar *** Open classic application programming interfaces(APIS)can be connected with Microsoft Visual Studio(VS).Based on NX Open application,users can develop menus,toolbars,dialog boxes and other tools to realize interactive *** can also call input parameters through the dialog box callback function,then activate the corresponding control application(callback function)by C++programming language and NX Open API complete *** on the secondary development function of UG software and VS,a digital design system suitable for high efficiency modeling of globoidal indexing CAM mechanism was developed to complete the human-machine interface interaction *** results show that comparing the digital design system with the traditional design,the system after parametric design can not only greatly shorten the design time,but also reduce the tedious repetitive work,which proves the superiority and feasibility of the digital design.

关键词： computer software parameterization design global optimization NX Open C secondary development

聚丙烯酸表面接枝改性聚丙烯抗氧化膜的制备与性能

在线全文

学校读者我要写书评

暂无评论

高分子材料科学与工程 2020年第7期36卷 134-139,148页

作者：于振卢莉璟卢立新潘嘹林自东江南大学机械工程学院包装工程系江苏无锡214122 江苏省食品先进制造装备技术重点实验室江苏无锡214122 山东碧海包装材料有限公司山东临沂276600

为解决微量过渡金属离子能够催化食品氧化的问题,利用紫外光表面接枝技术将丙烯酸(AA)接枝到聚丙烯(PP)膜表面,制备具备金属离子螯合能力的PP-g-PAA抗氧化膜。采用红外光谱、扫描电镜和金相显微镜对膜结构和形貌进行了表征。结果表明,... 详细信息

为解决微量过渡金属离子能够催化食品氧化的问题,利用紫外光表面接枝技术将丙烯酸(AA)接枝到聚丙烯(PP)膜表面,制备具备金属离子螯合能力的PP-g-PAA抗氧化膜。采用红外光谱、扫描电镜和金相显微镜对膜结构和形貌进行了表征。结果表明,获得了致密均匀的聚丙烯酸(PAA)接枝层;通过控制接枝时间获得了不同的羧基密度。采用TBO染色法和原子吸收光谱考察了膜表面羧基密度、Cu^(2+)螯合量及两者的比例关系。当膜表面羧基密度小于4.24μmol/cm^2时,羧基量与Cu^(2+)螯合量之比为4,说明两者能够形成稳定的五元环螯合结构,起到抑制金属离子催化氧化的作用;考察紫外光接枝对膜力学性能和阻隔性能的影响,接枝时间达到20 min时,膜的断裂伸长率急剧下降,氧气阻隔性能显著提高。

关键词：紫外光接枝聚丙烯膜聚丙烯酸螯合抗氧化

基于迷迭香精油温敏脂质体的响应型控释抗氧化复合膜制备

在线全文

学校读者我要写书评

暂无评论

精细化工 2021年第8期38卷 1564-1569,1612页

作者：孙君颖卢莉璟卢立新林自东江南大学机械工程学院江苏无锡214122 江苏省食品先进制造装备技术重点实验室江苏无锡214122 山东碧海包装材料有限公司山东临沂276600

以二棕榈酰磷脂酰胆碱(DPPC)和胆固醇为膜材,采用乙醚注入法制备迷迭香精油温敏脂质体,将温敏脂质体添加到壳聚糖-普鲁兰多糖溶液中,以双向拉伸聚丙烯(BOPP)为基膜制备抗氧化复合膜。对迷迭香精油温敏脂质体进行了包封率、粒径分布、多... 详细信息

以二棕榈酰磷脂酰胆碱(DPPC)和胆固醇为膜材,采用乙醚注入法制备迷迭香精油温敏脂质体,将温敏脂质体添加到壳聚糖-普鲁兰多糖溶液中,以双向拉伸聚丙烯(BOPP)为基膜制备抗氧化复合膜。对迷迭香精油温敏脂质体进行了包封率、粒径分布、多分散性指数(PDI)、相变温度和原子力显微镜的测定,测试了薄膜中精油释放率,验证薄膜温度响应特性。结果表明,制备的温敏脂质体平均包封率为65.6%,平均粒径为164.8nm,PDI平均值为0.163,相变温度为38.5和41.8℃。抗氧化复合膜中精油在42℃下7 d内释放率为94.1%,具有显著的温度响应控制释放作用。

关键词：温敏脂质体温度敏感普鲁兰多糖壳聚糖抗氧化功能材料

在线全文

学校读者我要写书评

暂无评论

民族题材美术创作的观念演变与现代价值

云南艺术学院学报 2023年第4期 79-85页

作者：林自栋中央民族大学美术学院

中国现当代美术发展的每一个阶段,都无法避开关注民族生活、表现民族题材的美术作品,这些作品不仅生动地表现了民族地区的生存境遇、生活方式与精神风貌的变迁,同时也反映出中国社会变革大潮中艺术观念的转向与演化。从20世纪早期对于... 详细信息

中国现当代美术发展的每一个阶段,都无法避开关注民族生活、表现民族题材的美术作品,这些作品不仅生动地表现了民族地区的生存境遇、生活方式与精神风貌的变迁,同时也反映出中国社会变革大潮中艺术观念的转向与演化。从20世纪早期对于民族风情与生活面貌的再现,到新中国民族大团结的时代讴歌与民族化的艺术探索,从改革开放之初在现代化语境中对于民族特色文化的转化与诠释,到20世纪末叶对边疆族裔群体的心灵现实、民族精神与生命意志的阐释,都深刻地折射出中国美术现代转型过程中不断挖掘民族文化资源的历史轨迹。

关键词：民族题材美术观念现代价值

在线全文

学校读者我要写书评

暂无评论

纸盒无菌灌装包装材料灭菌工艺优化

农业工程学报 2022年第4期38卷 324-330页

作者：董玉杰卢立新潘嘹林自东厉夫满江南大学机械工程学院无锡214122 江苏省食品先进制造装备技术重点实验室无锡214122 山东碧海包装材料有限公司临沂276600

为解决屋顶纸盒无菌灌装中包装材料灭菌工艺和灭菌效率问题,该研究进行工艺优化及提出微生物挑战测试方法。通过单因素试验研究过氧化氢溶液浓度、汽化过氧化氢蒸汽温度、汽化热空气压力和紫外线照射时间对灭菌效率的影响;并在此基础上... 详细信息

为解决屋顶纸盒无菌灌装中包装材料灭菌工艺和灭菌效率问题,该研究进行工艺优化及提出微生物挑战测试方法。通过单因素试验研究过氧化氢溶液浓度、汽化过氧化氢蒸汽温度、汽化热空气压力和紫外线照射时间对灭菌效率的影响;并在此基础上,依据Box-Behnken原理设计响应面试验,建立包装材料灭菌效率二次多项式回归模型,获得灭菌工艺优化参数并对其进行试验验证。采用微生物挑战测试方法确定包装材料灭菌效率,将嗜热脂肪芽孢杆菌孢子作为挑战测试微生物定量均匀涂布接种于屋顶纸盒包装材料内表面,应用平板计数法与最可能数(the Most Probable Number,MPN)法统计灭菌后材料表面孢子残留量,灭菌效率以接种孢子对数减少值(Log Cycle Reduction,LCR)表征。结果表明:过氧化氢溶液浓度、过氧化氢蒸汽温度、紫外线照射时间变化对灭菌效率影响显著(P<0.05),汽化热空气压力变化对灭菌效率影响不显著。得到灭菌效率二次多项式回归模型,当包装材料灭菌要求LCR值为5时,优化工艺参数为过氧化氢溶液浓度8%、过氧化氢蒸汽温度230℃。研究结果为无菌灌装包装材料灭菌工艺提供技术依据。

关键词：包装灭菌屋顶纸盒无菌灌装过氧化氢蒸汽灭菌微生物挑战测试优化

在线全文

学校读者我要写书评

暂无评论

屋顶纸盒灌装机包装材料灭菌模拟模型

农业工程学报 2022年第14期38卷 285-294页

作者：卢立新董玉杰潘嘹林自东厉夫满江南大学机械工程学院无锡214122 江苏省食品先进制造装备技术重点实验室无锡214122 山东碧海包装材料有限公司临沂276600

为保证屋顶纸盒无菌灌装机中包装材料无菌性,该研究采用质量分数为2%过氧化氢溶液雾化气溶胶对纸盒内表面进行灭菌,并基于纸盒灭菌过程建立数值模型并进行工艺优化。分析空气助力喷嘴雾化系统原理,结合计算流体力学(Computational Fluid... 详细信息

为保证屋顶纸盒无菌灌装机中包装材料无菌性,该研究采用质量分数为2%过氧化氢溶液雾化气溶胶对纸盒内表面进行灭菌,并基于纸盒灭菌过程建立数值模型并进行工艺优化。分析空气助力喷嘴雾化系统原理,结合计算流体力学(Computational Fluid Dynamics,CFD)与欧拉-拉格朗日(Euler-Lagrange)模型设置雾化连续相与分散相,得到不同雾化时间及雾化空气压力条件下溶液液滴直径、喷雾形状;通过实际条件下雾化形状对比,验证得到建立模型模拟结果与实际条件间误差较小(<15%),模型具有可靠性。在此基础上,建立纸盒灭菌过程数值模型,结合空气助力喷嘴雾化模拟与包装材料壁面液膜模型,分析250、500、1 000m L规格屋顶纸盒灭菌灭菌剂气溶胶覆盖均匀性。250m L纸盒存在底面过度灭菌、溶液覆盖残留量大,而1 000 mL纸盒存在底面灭菌不足、溶液接触量小等问题。通过调整喷雾高度、雾化空气压力等喷嘴雾化参数,优化纸盒灭菌工艺。250m L纸盒增加喷雾高度至50mm,1 000m L纸盒增加空气压力至200 kPa可使溶液分布均匀,改善灭菌效果,为屋顶纸盒灌装机包装材料过氧化氢气溶胶灭菌参数设置提供依据。

关键词：包装灭菌屋顶纸盒灌装机无菌包装空气助力喷嘴过氧化氢气溶胶