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A bird nest-like manganese dioxide and its application as electrode in supercapacitors

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Journal of Energy Chemistry 2013年第6期22卷 928-934页

作者： Fen Ran Huili Fan lingren wang Lei Zhao Yongtao Tan Xuanxuan Zhang Lingbin Kong Long Kang State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials Lanzhou University of Technology Key Laboratory of Non-ferrous Metal Alloys and Processing of Ministry of Education Lanzhou University of Technology

A novel bird nest-like nanostructured MnO2(BNNS-MnO2) was prepared by a facile and cost-effective strategy. Their structures and morphologies were characterized by field emission scanning electron microscopy, transmission electron microscopy and powder X-ray diffraction. Capacitive behaviors were investigated by cyclic voltammetry and galvanostatic charge-discharge. The obtained nano-MnO2 possesses a well designed loose-assembled hierarchical nanoarchitecture with an appropriate crystallinity which gives rise to excellent performances as an electrode material for supercapacitors. A maximum specific capacitance of 917 F/g has been obtained at a current density of 5 mA/cm2 in 6 mol/L KOH aqueous solution, and a specific capacitance of 210 F/g has been maintained for 500 cycles. As the low cost of MnSO4 and KCr2O7 and the low reaction temperature, the present method avoids the requirements for complicated operations, time/energy-consuming and expensive reagents, and perhaps is ready for the industrialization of nano-MnO2 production.

关键词： energy storage nanostructured MnO2 supercapacitors electrochemical performance electrode material

Recent advances in surface endothelialization of the magnesium alloy stent materials

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Journal of Magnesium and Alloys 2023年第1期11卷 48-77页

作者： Changjiang Pan Xuhui Liu Qingxiang Hong Jie Chen Yuxin Cheng Qiuyang Zhang Lingjie Meng Juan Dai Zhongmei Yang lingren wang Faculty of Mechanical and Material Engineering Jiangsu Provincial Engineering Research Center for Biomaterials and Advanced Medical DevicesHuaiyin Institute of TechnologyHuai’an 223003China The Affiliated Huai’an Hospital of Xuzhou Medical University Huai’an 223003China

Magnesium and its alloy have good mechanical properties and biodegradability,and have become the hotspot of the next-generation biodegradable vascular stent ***,their rapid degradation in vivo and poor biocompatibility are still the bottlenecks of clinical applications for the cardiovascular *** particular,how to induce the repair and regeneration of the vascular endothelial with normal physiological functions on the surface of the magnesium alloy stent materials represents the key to its clinical application in the field of cardiovascular *** has been believed that it is an ideal way to completely solve the postoperative complications through constructing the multifunctional anti-corrosive bioactive coating on the magnesium alloy surface to induce the formation of vascular endothelium with normal physiological ***,how to construct a corrosion-resistant multifunctional bioactive coating with the good endothelial regeneration abilities on the magnesium alloy surface still faces a great *** paper mainly focused on highlighting and summarizing the recent advances in the surface endothelialization of the magnesium alloy materials for the vascular stent,including the bio-inert coating,in-situ immobilization of bioactive molecules on the surface,polymer coating loaded with bioactive factors,novel multifunctional polymer coating,bioactive micropatterns,bioactive layer with glycocalyx-like structure,NO-releasing coating and bioactive sol-gel *** advantages and disadvantages of these strategies were discussed and ***,in the senses of future development and clinical application,this paper analyzed and summarized the development direction and prospect of surface endothelialization of the magnesium alloy vascular *** is anticipated that this review can give the new cues to the surface endothelialization of the cardiovascular magnesium alloy stents and promote future advancements in this field.

关键词： Magnesium alloy Stent Endothelialization Surface coating Surface modification

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医学院生物医学工程专业教学改革的探索

成才之路 2021年第7期 14-15页

作者：王翎任淮阴工学院江苏淮安223003

生物医学工程是一门新兴学科,其本质是生物医学与工程技术相结合的边缘学科。文章从生物医学工程专业的教学定位、课程体系的优化、教学内容的改革、教学方案的设计、理论教学与实践教学并重、加强师资队伍建设等方面,探讨医学院生物医... 详细信息

生物医学工程是一门新兴学科,其本质是生物医学与工程技术相结合的边缘学科。文章从生物医学工程专业的教学定位、课程体系的优化、教学内容的改革、教学方案的设计、理论教学与实践教学并重、加强师资队伍建设等方面,探讨医学院生物医学工程专业教学改革措施,以提高生物医学工程专业人才培养质量。

关键词：医学院生物医学工程专业教学改革教学策略

DoS攻击下基于自适应事件触发的无人水面艇航向控制和故障检测

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高技术通讯 2022年第9期32卷 945-958页

作者：王岭人叶泽华赵云波浙江工业大学信息工程学院杭州310000

针对网络能力受限和非周期拒绝服务(DoS)攻击干扰的网络化无人水面艇(USV)系统,提出一种基于自适应事件触发的故障检测滤波器(FDF)和控制器的设计方法。首先,构建一个考虑非周期DoS攻击、外部干扰和执行器故障同时存在的网络化USV控制... 详细信息

针对网络能力受限和非周期拒绝服务(DoS)攻击干扰的网络化无人水面艇(USV)系统,提出一种基于自适应事件触发的故障检测滤波器(FDF)和控制器的设计方法。首先,构建一个考虑非周期DoS攻击、外部干扰和执行器故障同时存在的网络化USV控制系统。然后,针对网络化USV系统,提出一种自适应事件触发机制,动态更新触发阈值,减少网络资源浪费。其次,通过构造一个分段Lyapunov函数,给出闭环系统全局指数稳定且具有指定H∞干扰衰减指数的充分条件,并设计基于观测的故障检测滤波器和控制器。最后,通过仿真验证了方法的有效性。结果表明,该方法不仅能对USV系统航向进行有效控制,而且能在节省网络资源的同时检测执行器故障的发生和位置。

关键词：无人水面艇(USV) 网络化控制系统(NCS) 拒绝服务(DoS)攻击自适应事件触发故障检测滤波器(FDF)

利用人的分歧介入增强珍珠自动分拣可靠性研究

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计算机测量与控制 2021年第11期29卷 224-229页

作者：花婷婷王岭人赵云波浙江工业大学信息工程学院杭州310023

针对珍珠自动分拣应用场景,把优等珍珠分成次等品会导致严重利益损失,把有瑕疵珍珠分成上等品会造成产品质量争议和企业信誉受损;基于深度学习的人工智能技术依旧存在着难解释、鲁棒性差等缺点,导致难以实现更高精度的分拣技术;为衡量... 详细信息

针对珍珠自动分拣应用场景,把优等珍珠分成次等品会导致严重利益损失,把有瑕疵珍珠分成上等品会造成产品质量争议和企业信誉受损;基于深度学习的人工智能技术依旧存在着难解释、鲁棒性差等缺点,导致难以实现更高精度的分拣技术;为衡量珍珠分拣准确度的现实需求和提升准确度在现有技术框架下的限制因素,研究提出了一种通过人的分歧介入提升分拣可靠性的方法;该方法引入两个独立AI系统用于珍珠分拣的预处理,然后通过二者之间的分歧引入人的介入干预,在较少的人力成本下达到了对机器算法可靠性的提升;定义了包括分歧准确指数和额外成本指数在内的性能评价指标,在公开珍珠数据集上,研究提出的方法以4.1%的额外人工成本提升了近4%的珍珠分拣精度,验证了方法的有效性。

关键词：珍珠分拣算法分歧人的介入仲裁人机融合

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南京市自来水中的痕量有机物

南京大学学报(自然科学版) 1985年第3期 509-514页

作者：江鸥季竞正陈建林孔令仁周爱和王连生

本文对南京市自来水中痕量有机污染物进行了初步研究。将水用GDX-502树脂进行富集,然后用高分辨毛细管气相色谱—四极矩质谱联用法分析,初步检查出有敌敌畏、六六六、双—(2—氟乙基)醚等73种有机污染物存在。

关键词：毛细管气相色谱质谱联用有机污染物化学污染物痕量有机物总离子流图洗脱液南京市

化学发光法测定镀铬废液及自来水中Cr(Ⅲ)

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厦门大学学报（自然科学版） 1989年第4期28卷 433-435页

作者：王尊本郑朱梓陈灵仁厦门大学化学系

痕量Cr(Ⅱ)对H_2O_2在碱性介质中氧化鲁米诺的反应具有催化作用,反应过程中会发出波长为425 nm的光线,发光强度与Cr(Ⅱ)的含量成比例关系,据此可测定Cr(Ⅲ)。

关键词：化学发光法镀铬废液自来水

The Precision Estimate of Multi-Fractal Methods of Time Sequence of Earthquakes

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Earthquake Research in China 2000年第4期14卷 47-56页

作者： Zhu lingren , Zhou Shiyong , Yang Maling , Hong Shizhong , Gong Yuqing and wang Haitao Seismological Bureau of Xinjiang Uygur Autonomous Region, Urumqi 830011 , ChinaSeismological Bureau of Guangdong Province, Guangzhou 510070. China Seismological Bu Seismological Bureau of Xinjiang Uygur Autonomous Region Urumqi 830011 China Seismological Bureau of Guangdong Province Guangzhou 510070 China Seismological Bureau of Chengdu City Chengdu 610015 China Computer Center of Xinjiang Uygur Autonomous Region Urumqi 830011 China

At present,there are many methods of calculating seismic ***,there isn’t aquantitative result about the precision of every ***,in this Paper,we use the digitalimitation of theoretic model to solve precision estimate problems of calculating the precision ofone dimension distribution of theoretic models with Cantor multi-fractal set,we obtained someresults as follows:(1)There exists many problems such as rules,numbers of samples,basicpoint selection,the diffence resulted from different methods and so on.(2)The fixed-massmethod(MAS)and the minimal spanning tree method(MST)can give good structure charac-teristics with different q value,while the counting-boxes method can’*** the error of thefixed-radius method(RAD)in the range of-q is too big.(3)There are scale problems of rulesfor multi-fractal,it is objective reflection for non-rule area.(4)MST has the boundary prob-lem,while MAS and RAD don’t.(5)With increasing sample number,the precision of allfractal-dimension values

关键词： Multi-fractal Precision Theoretic model Sample number

提高GCMS离子源温度准确定量低浓度DEHP和PAHs

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中国环境监测 2016年第6期32卷 112-117页

作者：颜涛金玲仁李红莉王述伟朱晨山东省环境监测中心站山东济南250101

为解决GCMS难以准确定量环境样品中低浓度多环芳烃、酞酸酯类等高沸点、难挥发性有机物的难题,对比了GC进样口温度与MS温度对测定低浓度邻苯二甲酸二(2-乙基己)酯(DEHP)、PAHs的影响。结果证明,MS离子源温度是准确定量DEHP、PAHs的关键... 详细信息

为解决GCMS难以准确定量环境样品中低浓度多环芳烃、酞酸酯类等高沸点、难挥发性有机物的难题,对比了GC进样口温度与MS温度对测定低浓度邻苯二甲酸二(2-乙基己)酯(DEHP)、PAHs的影响。结果证明,MS离子源温度是准确定量DEHP、PAHs的关键因素,通过提高MS离子源温度能大幅度提高PAHs的灵敏度,且MS温度对沸点越高的PAHs灵敏度影响越大。在高MS离子源温度(330℃)条件下,建立了16种PAHs的SIM校准曲线,定量浓度低至5 ng/m L,表现出极高的灵敏度。为今后开发各类环境中低浓度难挥发性有机物的GCMS定量方法提供借鉴意义。

关键词：气相质谱离子源温度低浓度高沸点难挥发性有机物多环芳烃酞酸酯邻苯二甲酸二(2-乙基己)酯