检索结果-南通市图书馆

Journal of Magnesium and Alloys 2024年第1期12卷 197-208页

作者： Yingyan Zhao Zhibing Liu Jiangchuan Liu Yunfeng Zhu jiguang zhang Yana Liu Xiaohui Hu Liquan Li College of Materials Science and Engineering Nanjing Tech University30 South Puzhu RoadNanjing211816PR China Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites Nanjing Tech UniversityNanjing211816PR China

The hydrogen absorption/desorption kinetic properties of MgH_(2)can be effectively enhanced by doping specific *** this work,MOFs-derived NiCu@C nanoparticles(~15 nm)with regular core-shell structure were successfully prepared and introduced into MgH_(2)(denoted as MgH_(2)-NiCu@C).The onset and peak temperatures of hydrogen desorption of MgH_(2)-11 wt.%NiCu@C are 175.0℃and282.2℃,*** apparent activation energy of dehydrogenated reaction is 77.2±4.5 kJ/mol for MgH_(2)-11 wt.%NiCu@C,which is lower than half of that of the as-milled MgH_(2).Moreover,MgH_(2)-11 wt.%NiCu@C displays great cyclic *** strengthening"hydrogen pumping"effect of reversible solid solutions Mg_(2)Ni(Cu)/Mg_(2)Ni(Cu)H_(4)is proposed to explain the remarkable improvement in hydrogen absorption/desorption kinetic properties of MgH_(2).This work offers a novel perspective for the design of bimetallic nanoparticles and beyond for application in hydrogen storage and other energy related fields.

关键词： Magnesium hydride Reversible solid solution Core-shell nanoparticles Hydrogen storage performance

Magnesium nickel hydride monocrystalline nanoparticles for reversible hydrogen storage

在线全文

学校读者我要写书评

暂无评论

Materials Reports(Energy) 2024年第1期4卷 104-112页

作者： Yingyan Zhao Yunfeng Zhu Rui Shi jiguang zhang Yana Liu Jun Wang Liquan Li College of Materials Science and Engineering Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function CompositesNanjing Tech University30 South Puzhu RoadNanjing211816PR China

Although Mg-based hydrides are extensively considered as a prospective material for solid-state hydrogen storage and clean energy carriers,their high operating temperature and slow kinetics are the main challenges for practical ***,a Mg-Ni based hydride,Mg_(2)NiH_(4) nanoparticles(~100 nm),with dual modification strategies of nanosizing and alloying is successfully prepared via a gas-solid preparation *** is demonstrated that Mg_(2)NiH_(4) nanoparticles form a unique chain-like structure by oriented stacking and exhibit impressive hydrogen storage performance:it starts to release H2 at~170℃ and completes below 230℃ with a saturated capacity of 3.32 wt%and desorbs 3.14 wt% H_(2) within 1800 s at 200℃.The systematic characterizations of Mg_(2)NiH_(4) nanoparticles at different states reveal the dehydrogenation behavior and demonstrate the excellent structural and hydrogen storage stabilities during the de/hydrogenated *** research is believed to provide new insights for optimizing the kinetic performance of metal hydrides and novel perspectives for designing highly active and stable hydrogen storage alloys.

关键词： Magnesium-based hydride Chemical vapor deposition Nanoparticles Hydrogen storage performance

基于脂肪酸组成结合主成分分析识别不同比例大豆油和菜籽油调配的调和油

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

中国粮油学报 2024年第4期39卷 140-148页

作者：吕世懂张慧君杨学芳吴万富张继光昆明市粮油饲料产品质量检验中心昆明650118 云南省粮油产品质量监督检验站昆明650118 云南昆明国家粮食质量监测站昆明650118 淮北师范大学生命科学学院淮北235000 安徽省西瓜甜瓜生物育种工程研究中心淮北235000 昆明医科大学科技成果孵化中心昆明650500

结合脂肪酸组成和化学计量学方法,对大豆油、菜籽油及其不同比例的二元调和油的识别进行基础研究,并分析不同比例调和油中脂肪酸含量的变化。结果表明在大豆油和菜籽油中,共检出脂肪酸组分17种,主要以油酸、亚油酸、棕榈酸和亚麻酸为主... 详细信息

结合脂肪酸组成和化学计量学方法,对大豆油、菜籽油及其不同比例的二元调和油的识别进行基础研究,并分析不同比例调和油中脂肪酸含量的变化。结果表明在大豆油和菜籽油中,共检出脂肪酸组分17种,主要以油酸、亚油酸、棕榈酸和亚麻酸为主。在以不同比例低芥酸菜籽油和大豆油调配的调和油中,脂肪酸含量随调和比例的改变而呈现一定趋势的增加或减小。结合脂肪酸组成,对所有的139个样品进行了主成分分析(PCA),结果表明大豆油和菜籽油可以互相实现区分,不同比例的调和油样品分布在调配的溯源样品之间,基本按照比例关系分布成一条直线。研究通过对菜籽油、大豆油及其不同比例调配的调和油的脂肪酸组成进行了定量分析,分析了它们之间脂肪酸组成的变化,并结合化学计量学手段进行一些识别分析,为规范调和油的生产和保障公平有序的调和油市场提供参考。

关键词：大豆油菜籽油调和油脂肪酸组成主成分分析

在线全文

学校读者我要写书评

暂无评论

融合点云与图像的环境目标检测研究进展

中国图象图形学报 2024年第6期29卷 1765-1784页

作者：贾明达杨金明孟维亮郭建伟张吉光张晓鹏中国科学院自动化研究所多模态人工智能系统全国重点实验室北京100190 中国科学院大学人工智能学院北京100049

在数字仿真技术应用领域,特别是在自动驾驶技术的发展中,目标检测是至关重要的一个环节,它涉及对周围环境中物体的感知,为智能装备的决策和规划提供了关键信息。近年来,随着传感器技术的进步,图像和点云成为两种主要的感知数据源,它们... 详细信息

在数字仿真技术应用领域,特别是在自动驾驶技术的发展中,目标检测是至关重要的一个环节,它涉及对周围环境中物体的感知,为智能装备的决策和规划提供了关键信息。近年来,随着传感器技术的进步,图像和点云成为两种主要的感知数据源,它们各自在基于深度学习技术的目标检测方法研究中具有独特的优势。为了更加全面地对现有基于点云和图像的目标检测方法进行研究,本文对基于图像、点云及两者联合的3类目标检测算法进行系统的梳理和总结,旨在探索如何将这两种数据源融合起来,促进提高目标检测的准确性、稳定性和鲁棒性,并对融合点云和图像的环境目标检测发展方向进行展望。

关键词：点云自动驾驶多模态目标检测融合

中文语篇照应手段英译研究——基于《杜鹃》张培基译文与学生译文的对比分析

在线全文

学校读者我要写书评

暂无评论

英语教师 2024年第7期24卷 56-59页

作者：吴可邢佳佳张继光江苏师范大学外国语学院江苏徐州221100

以英语专业本科生49份译文及张培基的《杜鹃》英译本为研究对象,基于语篇衔接理论框架,采用统计分析和对比分析的研究方法,从中文原文与专家译文、专家译文与学生译文两个方面进行对比研究,探讨汉英语篇衔接中的照应手段的运用,旨在揭... 详细信息

以英语专业本科生49份译文及张培基的《杜鹃》英译本为研究对象,基于语篇衔接理论框架,采用统计分析和对比分析的研究方法,从中文原文与专家译文、专家译文与学生译文两个方面进行对比研究,探讨汉英语篇衔接中的照应手段的运用,旨在揭示学生汉英翻译文本中的语篇衔接问题。结果表明,学生译文中各种衔接手段的频数与专家译文之间存在显著差异。进一步分析发现学生汉英翻译文本中语篇衔接存在的主要问题为:对照应手段的使用具有随意性、不当性、混乱性,不善于使用人称照应。

关键词：汉英翻译语篇照应衔接手段《杜鹃》

基于免疫粒子群的水轮机调节系统动态滑模控制系统

在线全文

学校读者我要写书评

暂无评论

自动化与仪表 2024年第2期39卷 60-64,70页

作者：张继光丁正红李腾飞陕西省水电开发集团股份有限公司西安710065

为提高水轮机的调节性能和稳定性,满足日益增长的清洁能源需求和能源利用效率,研究基于免疫粒子群的水轮机调节系统的动态滑模控制系统。构建水轮机调节系统动态滑模控制系统结构,分析水轮机调节系统运行状态,通过动态滑模控制器对水轮... 详细信息

为提高水轮机的调节性能和稳定性,满足日益增长的清洁能源需求和能源利用效率,研究基于免疫粒子群的水轮机调节系统的动态滑模控制系统。构建水轮机调节系统动态滑模控制系统结构,分析水轮机调节系统运行状态,通过动态滑模控制器对水轮机的运行状态进行预测和控制,使水轮机的运行状态能够平滑、稳定地跟踪给定的参考轨迹,并采用免疫粒子群算法优化动态滑模控制器的参数,将优化后的控制结果作用于电液伺服系统,控制油缸位置,保障对水轮机状态稳定和精确调节,及时跟踪和响应系统状态变化。实验结果可知,该系统在锯齿波信号和阶跃信号下具有适应性强、鲁棒性好,并有效解决了系统的抖振问题,且控制误差小。

关键词：免疫粒子群水轮机调节系统动态滑模控制

Facet-dependent catalytic activity of two-dimensional Ti_(3)C_(2)T_(x) MXene on hydrogen storage performance of MgH_(2)

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第10期11卷 3724-3735页

作者： Haiguang Gao Rui Shi Yana Liu Yunfeng Zhu jiguang zhang Liquan Li Xiaohui Hu College of Materials Science and Engineering Nanjing Tech University30 South Puzhu RoadNanjing 211816PR China Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites Nanjing Tech UniversityNanjing 211816PR China

Two-dimensional Ti_(3)C_(2)T_(x) MXenes exposing different active facets are introduced into MgH_(2), and their catalytic effects are systematically investigated in depth through experimental and theoretical approaches. Excluding factors such as interlayer space, surface functional groups and experimental contingency, the exposed facets is considered to be the dominant factor for catalytic activity of Ti_(3)C_(2)T_(x) towards MgH_(2).More exposed edge facets of Ti_(3)C_(2)T_(x) displays higher catalytic activity than that with more exposed basal facets, which also leads to different rate-controlling steps of MgH_(2) in the de/hydrogenation process. The low work function, strong hydrogen affinity and high content of in situ metallic Ti for the edge facet contribute the high catalytic activity. This work will give insights into the structural design of two-dimensional Ti_(3)C_(2)T_(x) MXene used for enhancing the catalytic activity in various fields.

关键词： Hydrogen storage materials Magnesium hydride MXene Catalyst Facet design

2型糖尿病下肢血管病变患者介入治疗后血清NLRP3及sVCAM-1水平对再狭窄的意义

在线全文

学校读者我要写书评

暂无评论

中国循证心血管医学杂志 2024年第5期16卷 573-576,582页

作者：张继光杨贤达靳开星河北省邯郸市中心医院血管介入科邯郸056000

目的探讨2型糖尿病下肢血管病变患者介入治疗后血清NOD样受体蛋白3(NLRP3)及可溶性血管细胞黏附分子-1(sVCAM-1)水平对再狭窄的意义。方法回顾性分析2022年1月~2023年1月于河北省邯郸市中心医院血管介入科104例成功行血管介入治疗的2型... 详细信息

目的探讨2型糖尿病下肢血管病变患者介入治疗后血清NOD样受体蛋白3(NLRP3)及可溶性血管细胞黏附分子-1(sVCAM-1)水平对再狭窄的意义。方法回顾性分析2022年1月~2023年1月于河北省邯郸市中心医院血管介入科104例成功行血管介入治疗的2型糖尿病下肢血管病变患者的临床资料。根据介入后再狭窄发生情况分为再狭窄组(n=20)和无再狭窄组(n=84),比较两组患者一般资料及介入后24 h血清NLRP3、sVCAM-1水平,采用多因素Logistic回归模型分析再狭窄发生的影响因素;创建受试者工作特征(ROC)曲线,分析血清NLRP3、sVCAM-1检测对再狭窄的预测价值。结果与无再狭窄组相比,再狭窄组患者2型糖尿病病程、下肢动脉病变长度更长,Fontaine分期Ⅳ期占比、下肢动脉完全闭塞占比及血清糖化血红蛋白(HbA1c)、超敏C反应蛋白(hs-CRP)、NLRP3、sVCAM-1水平更高(P<0.05);多因素Logistic回归分析显示,下肢动脉完全闭塞、下肢动脉病变长度、HbA1c、NLRP3及sVCAM-1是2型糖尿病下肢血管病变患者介入后再狭窄发生的影响因素(P<0.05);ROC曲线显示,血清NLRP3、sVCAM-1联合检测对2型糖尿病下肢血管病变患者介入后再狭窄发生的预测价值较高,敏感度为95.00%,特异度为71.43%,ROC曲线下面积为0.929。结论血清NLRP3、sVCAM-1水平高表达均是2型糖尿病下肢血管病变患者介入治疗后再狭窄发生的危险因素,二者联合检测能提高2型糖尿病下肢血管病变患者介入治疗后再狭窄预测的准确性。

关键词： 2型糖尿病下肢血管病变介入治疗 NOD样受体蛋白3 可溶性血管细胞黏附分子-1

Assisting Ni catalysis by CeO_(2) with oxygen vacancy to optimize the hydrogen storage properties of MgH_(2)

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第28期159卷 62-71页

作者： Jiangchuan Liu Qinke Tang Yunfeng Zhu Yana Liu jiguang zhang Zhixin Ba Xiaohui Hu Liquan Li College of Materials Science and Engineering Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function CompositesNanjing Tech UniversityNanjing 211816China School of Materials Science and Engineering Nanjing Institute of TechnologyNanjing 211167China

Although MgH_(2) has been widely regarded as a promising material for solid-state hydrogen storage,its high operating temperature and slow kinetics pose a major bottleneck to its practical ***,a nanocomposite catalyst with interfacial coupling and oxygen defects,Ni/CeO_(2),is fabricated to promote H_(2) desorption and absorption properties of MgH_(2).The interface of Ni/CeO_(2) contributes to both strong mechanical coupling towards stabilizing partial Ni and electronic coupling towards inducing a high con-centration of oxygen vacancies in CeO_(2).Theoretical calculations evidence that CeO_(2) with oxygen vacancy assist Ni in weakening the energy of Mg-H bond as well as enhancing the adsorption energy of Ni upon hydrogen atoms,and the extent of this assistance surprisingly increases with increasing oxygen vacancies *** a result,an impressive performance is achieved by MgH_(2)-5 wt.%Ni/CeO_(2) with onset desorption temperature of only 165°C,and it absorbs approximately 80%hydrogen in just 800 s at 125°*** generation mechanism of intermediate active species concerning Ni/CeO_(2) in different states has been analyzed for the first time,and the relationship between interfacial coupling and phase evolution has been ***,a mechanism of the catalysis-assisting effect regarding oxygen defects is *** is believed that this work provides a unique perspective on the mechanism of interfacial coupling and the generation of defects in composite catalysts.

关键词： Hydrogen storage Interfacial coupling Oxygen defects Catalysis-assisting

Air-stable magnesium nickel hydride with autocatalytic and self-protective effect for reversible hydrogen storage

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

Nano Research 2022年第3期15卷 2130-2137页

作者： Zhongliang Ma Yingyan Zhao Zhaohui Wu Qinke Tang Jinlian Ni Yunfeng Zhu jiguang zhang Yana Liu Yao zhang Hai-Wen Li Xiaohui Hu Xinjian Zhu Liquan Li College of Materials Science and Engineering Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function CompositesNanjing Tech University30 South Puzhu RoadNanjing 211816China Jiangsu Qianjing New Energy Industrial Technology Research Institute Co. Ltd1 Dangui RoadZhenjiang 212028China School of Materials Science and Engineering Southeast UniversityNanjing 211189China Hefei General Machinery Research Institute Hefei230031China WPI International Institute for Carbon-Neutral Energy Research(WPI-I2CNER)Kyushu UniversityFukuoka 819-0395Japan

Among the factors which restrict the large-scale utilization of magnesium-based hydride as a hydrogen storage medium,the high operating temperature,slow kinetics,and air stability in particular are key *** this work,a novel method,namely hydriding combustion synthesis plus short-term mechanical milling followed by air exposure,was proposed to synthesize air stable and autocatalytic magnesium nickel hydride(Mg2NiH4),which shows excellent hydrogen absorption/desorption kinetics,capacity retention and oxidation *** short-term-milled Mg2NiH4 can desorb 2.97 wt.%hydrogen within 500 s at 230℃.Even after exposure under air atmosphere for 67 days,it can still desorb 2.88 wt.%hydrogen within 500 s at 230℃.The experimental and theoretical results both indicated that the surface of as-milled Mg2NiH4 was easy to be oxidized under air ***,the in-situ formed Ni during air exposure of Mg2NiH4 improved the hydrogen desorption kinetics,and the formed surface passivation layer maintained the hydrogen storage capacity and avoided further poisoning,which we called autocatalytic and self-protective *** a novel dual effect modified the reaction activity and oxidation resistance of the air-exposed *** findings provide useful insights into the design and preparation of air stable metal-based hydride for large-scale utilization and long-term storage.

关键词： oxidation resistance autocatalytic self-protective magnesium based hydride hydrogen storage