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Chemical Research in Chinese Universities 2021年第3期37卷 763-771页

作者： DAI Mengjiao MA Weiguang han Fangjie han dongfang han Lipeng WANG Wei ZHAO Bolin han Dongxue NIU Li WANG Zhenxin State Key Laboratory of Electroanalytical Chemistry c/o Engineering Laboratory for Modern Analytical TechniquesChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022P.R.China University of Science and Technology of China Hefei230026P.R.China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023P.R.China Center for Advanced Analytical Science c/o School of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou510006P.R.China

The photoelectrochemical properties of semiconductors mainly depend on the size and shape of the corresponding ***,3D WO3 nanosheets were controllably synthesized with the aid of polyethyleneimine,which presents enhanced photocurrent *** on this excellent photoelectrochemical property,a photoelectrochemical chip was prepared by lithography technology for the smart monitoring of the antioxidant capacity(AC)in red wine and exhibits a series of advantages including rapid response time,high sensitivity,and long-lasting *** mechanism of the present photoelectrochemical sensing was explored and shows a single electron transfer ***,only 200µL of samples are required for one testing,which demonstrates that the present photoelectrochemical chip can be potentially integrated with a portable commercial device(such as a mobile phone)for further research and development of food and drug supervision.

关键词： 3D tungsten trioxide nanosheet Photoelectrochemical chip Antioxidant capacity assessment Red wine assessment Gallic acid

Control synthesis for a class of nonlinear systems based on partition of unity

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控制理论与应用（英文版） 2007年第2期5卷 145-151页

作者： dongfang han Yinhe WANG Siying ZhanG Science College Shantou University Shantou Guangdong 515063 China College of Information Science and Engineering Northeastern University Shenyang Liaoning 110006 China

A partition-of-unity-based approach is proposed to derive an approximate model for a class of nonlinear systems. The precision of the approximate model is analyzed by using the modulus of continuity of continuous functions. The system stability of the approximate model is analyzed by using Lyapunov stability theory. A design algorithm for constructing tracking controllers with tracking performance related to tracking error is given based on the approximate model and the partition of unity method.

关键词： Partition of unity Approximate model Modulus of continuity H∞ tracking controller

A Label-free Photoelectrochemical Sensor Based on Bi_(2)S_(3)@Nitrogen Doped Graphene Quantum Dots for Ascorbic Acid Determination

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Chemical Research in Chinese Universities 2022年第6期38卷 1387-1393页

作者： WU Zhifang LIANG Zhishan HE Ziqian WANG Tianqi XIAO Ren han Fangjie ZHAO Zhengzheng han dongfang han Dongxue NIU Li School of Civil Engineering Center for Advanced Analytical ScienceSchool of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou510006P.R.China Guangdong Provincial Key Laboratory of Psychoactive Substances Monitoring and Safety Anti-Drug Technology Center of Guangdong ProvinceGuangzhou510230P.R.China

We report a photoelectrochemical(PEC)sensor for selective detection of ascorbic(AA)by introducing Z-scheme Bi_(2)S_(3)@nitrogen doped graphene quantum dots(Bi_(2)S_(3)@NGQDs)heterojunctions as efficient photoactive *** Bi_(2)S_(3)@NGQDs were successfully prepared by a simple hydrothermal process,and the microstructures and components were investigated by various characterized *** photocurrent of the Bi_(2)S_(3)@NGQDs-based sensor increased significantly in the presence of AA and showed excellent selectivity and stability for AA detection in the presence of some other antioxidants and small molecules.A wide linear range of 0.1–5µmol/L and 5–1380µmol/L was achieved for the AA detection with a detection limit of 36 nmol/L(S/N=3).Moreover,the proposed PEC sensor achieved the determination of AA in real red peppers and commercially available vitamin C tablets samples.

关键词： Photoelectrochemical sensor Ascorbic acid Z-Scheme heterojunction

Reform and Opening up,the Motive Power for the Technical Advance of dongfang Hydroelectric Equipment

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Electricity 2010年第1期21卷 30-33页

作者： han Zhiqiao dongfang Electric Machinery Co., Ltd. dongfang Electric Machinery Co. Ltd.

Preface On October 13, 1958, in the county town of Deyang in southwestern China, a new power equipment manufacture enterprise-Dongfa ng Electric Machinery was es tablished, which had been placed

关键词： Reform and Opening up,the Motive Power for the Technical Advance of dongfang Hydroelectric Equipment

Label-free photoelectric sensor for lactic acid determination in human sweat

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Chinese Chemical Letters 2023年第4期34卷 474-478页

作者： Hao Gu Guoxin Dai Siyu Liu Yanbing Zhai Qian Xu Hongqiang Wu Wei Xu School of Life Science Beijing Institute of TechnologyBeijing 100081China School of Medical Technology Beijing Institute of TechnologyBeijing 100081China National Institute of Metrology Beijing 100029China Biotree Metabolomics Technology Research Center Shanghai 201800China

A label-free lactic acid sensor has been successfully developed by using a Dysprosium single crystal-based photoelectric potential technique via Dy-SCN/FTO electrode. Interestingly, the proposed sensor demonstrated excellent performance for L-lactic acid analysis with a wide linear range of 0.0196~16.31 mmol/L,the detection limit of as low as 3.20 μmol/L as well as an advisable stability. The feasibility of this strategy was also verified by practical application towards human sweat samples. The mechanism studies indicated that lactic acid molecules specifically bind to the surface of semiconductor materials, which alters the charge distribution of the electrode surface and subsequently results in band bending/photoelectric potential changes. The theoretical formula for this photoelectric chemistry(PEC) strategy was then derived according to charge balance theory. We believe that the proposed Dy-SCN/FTO sensor would open a new way for rapid, non-invasive L-lactic acid level evaluation during human physical condition monitoring.

关键词： Mass spectrometry Instrumentation LC-MS Immunosuppressants

肺结核患者健康促进行为与健康心理控制源关系的混合研究

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中华护理杂志 2024年第9期59卷 1029-1036页

作者：韩冬芳田甜高畅张婧珺李小妹西安交通大学第一附属医院妇产科西安市710061 西安交通大学医学部护理学系

目的调查肺结核患者健康促进行为的现状,并深入剖析其与健康心理控制源的关系,以期为有效提升肺结核患者健康促进行为提供参考。方法采用混合方法研究中的解释性序列设计。通过方便抽样法,于2023年1月-4月在西安市2所结核病定点医院选取... 详细信息

目的调查肺结核患者健康促进行为的现状,并深入剖析其与健康心理控制源的关系,以期为有效提升肺结核患者健康促进行为提供参考。方法采用混合方法研究中的解释性序列设计。通过方便抽样法,于2023年1月-4月在西安市2所结核病定点医院选取300例肺结核患者作为研究对象,使用一般资料调查表、健康促进生活方式量表-Ⅱ和多维度健康心理控制源量表收集资料,并进行单因素分析、多重线性回归分析。采用目的性抽样法选择11例肺结核患者进行半结构化访谈,采用Colaizzi 7步法提炼主题。结果量性研究最终纳入294例,肺结核患者健康促进生活方式量表-Ⅱ总分为(110.26±15.74)分;内部控制型健康心理控制源、机遇控制型健康心理控制源和职业状态显著影响其健康行为水平(P<0.05)。质性研究共提炼4个主题,包括自我健康意识的觉醒、建立正常生活秩序的渴望、多重不确定感的困扰及权威性指导的即时效应。质性和量性研究结果互相补充,验证了肺结核患者健康促进行为和健康心理控制源的关系。结论肺结核患者健康促进行为水平亟需进一步提升。在护理肺结核患者时,需要以健康教育为契机,借助个体健康意识觉醒的催化作用,提升其内部控制型健康心理控制源倾向,降低其因多重不确定感而出现的机遇控制型健康心理控制源倾向,帮助肺结核患者形成并维持持久的健康促进行为。

关键词：肺结核健康促进行为健康心理控制源混合方法研究心理护理学

MNb_2O_6-NaNbO_3-SiO_2(M=Pb,Ba,Sr)体系玻璃陶瓷纳米复合材料的结构和介电性能研究

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稀有金属 2012年第1期36卷 109-114页

作者：韩东方张庆猛唐群罗君杜军北京有色金属研究总院先进电子材料研究所北京100088

应用铸造快冷及可控结晶技术制备3种玻璃陶瓷纳米复合介电材料———PbNb2O6+NaNbO3+SiO2(PNS),BaNb2O6+NaNbO3+SiO2(BNS)和SrNb2O6+NaNbO3+SiO2(SNS)。研究了这3种复合材料的结晶性能,微观形貌和介电性能。X射线衍射(XRD)的分析结果显... 详细信息

应用铸造快冷及可控结晶技术制备3种玻璃陶瓷纳米复合介电材料———PbNb2O6+NaNbO3+SiO2(PNS),BaNb2O6+NaNbO3+SiO2(BNS)和SrNb2O6+NaNbO3+SiO2(SNS)。研究了这3种复合材料的结晶性能,微观形貌和介电性能。X射线衍射(XRD)的分析结果显示:PNS及SNS的玻璃在750℃可控结晶时,均形成中间相A2Nb2O7(A=Pb,Sr),且该中间相在850℃时消失,此时形成MNb2O6+NaNbO3(M=Pb,Sr)的高介电常数相,而BNS则未经过中间相,在750℃直接析出MNb2O6+NaNbO3(M=Ba)的高介电常数相。在所有的样品中,随着退火温度的升高,晶粒均有逐渐长大聚集的趋势。同时,SNS玻璃陶瓷在750℃及850℃结晶退火处理时,均析出枝状晶粒,异于PNS和BNS的球状晶粒。由可控结晶技术制备的玻璃陶瓷介电性能受热处理过程中所形成的介电相组成及其体积分数和晶粒尺寸的影响很大。分析测试了这3种体系玻璃陶瓷的介电常数与结晶化处理温度之间的关系及介电常数的电场稳定性。在900℃结晶退火时,PNS玻璃陶瓷具有最高的介电常数(～501,1 kHz),而BNS的介电常数在0～15 ***-1的测试范围内具有最好的电场稳定性(<15%)。

关键词：玻璃陶瓷铌酸盐钨青铜结构介电性能

包裹和热压制备Al2O3/Cu复合材料及性能研究

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热加工工艺 2008年第10期37卷 18-21页

作者：侯铁翠韩东方张锐卢红霞郑州大学材料科学与工程学院河南郑州450002 郑州大学综合设计研究院河南郑州450002

采用非匀相沉淀法制备了纳米Cu包裹Al2O3复合粉体,并利用热压烧结制备出Al2O3/Cu复合材料。利用X-ray衍射(XRD)、热重/差式-量热扫描法(TG/DSC)、透射电镜(TEM)对复合粉体的成分、热学特性以及形貌特征进行了表征;利用扫描电镜(SEM)、... 详细信息

采用非匀相沉淀法制备了纳米Cu包裹Al2O3复合粉体,并利用热压烧结制备出Al2O3/Cu复合材料。利用X-ray衍射(XRD)、热重/差式-量热扫描法(TG/DSC)、透射电镜(TEM)对复合粉体的成分、热学特性以及形貌特征进行了表征;利用扫描电镜(SEM)、显维硬度计及万能试验机测试分析了复合材料的微观结构及力学性能。结果表明,利用非匀相沉淀法可以得到Cu包裹Al2O3的纳米复合粉体,包裹层为非连续态的纳米Cu颗粒,颗粒呈球形,尺寸为10nm左右。同单相Al2O3陶瓷相比,Al2O3/Cu复合陶瓷的力学性能有显著提高,断裂韧性是单相Al2O3陶瓷的1.5倍,复合陶瓷的抗弯强度比单相Al2O3陶瓷提高,且数值离散性下降。

关键词：包裹 Al2O3复合材料性能