检索结果-内蒙古大学图书馆

Bionic Optimization Design of Electronic Nose Chamber for Oil and Gas Detection

Journal of Bionic engineering 2018年第3期15卷 533-544页

作者： Zhiyong Chang Youhong Sun Yuchen Zhang Yanli Gao Xiaohui Weng Donghui Chen Liewe David Jun Xie Key Lab of Advanced Technologies of Materials Ministry of Education School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 China Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun 130022 China National-Local Joint Engineering Laboratory of In-situ Conversion Drilling and Exploitation Technology for Oil Shale Jilin University Changchun 130021 China College of Construction Engineering Jilin University Changchun 130022 China Clinical Medicine Bethune First Hospital of Jilin University Changchun 130021China College of Mechanical Science and Engineering Jilin University Changchun 130022 China School of Computing and Technology the University of Gloucestershire The Park Cheltenham GL50 2RH UK Air Combat Service Academy Air Force Aviation University Changchun 130021 China

In this paper, a miniaturized bionic electronic nose system is developed in order to solve the problems arising in oil and gas detection for large size and inflexible operation in downhole. The bionic electronic nose chamber is designed by mimicking human nasal turbinate structure, V-groove structure on shark skin surface and flow field distribution around skin surface. The sensitivity of the bionic electronic nose system is investigated through experimentation. Radial Basis Function （RBF） and Support Vector Machines （SVM） of 10-fold cross validation are used to compare the recognition performance of the bionic electronic nose system and common one. The results show that the sensitivity of the bionic electronic nose system with bionic composite chamber （chamber B） is significantly improved compared with that with common chamber （chamber A）. The recognition rate of chamber B is 4.27% higher than that of chamber A for the RBF algorithm, while for the SVM algorithm, the recognition rate of chamber B is 5.69% higher than that of chamber A. The three-dimensional simulation model of the chamber is built and verified by Computational Fluid Dynamics （CFD） simulation analysis. The number of vortices in chamber B is fewer than that in chamber A. The airflow velocity near the sensors inside chamber B is slower than that inside chamber A. The vortex intensity near the sensors in chamber B is 2.27 times as much as that in chamber A, which facilitates gas molecules to fully contact with the sensor surface and increases the intensity of sensor signal, and the contact strength and time between odorant molecules and sensor surface. Based on the theoretical investigation and test validation, it is believed that the proposed bionic electronic nose system with bionic composite chamber has potential for oil and gas detection in downhole.

关键词： electronic nose bionic chamber sensors oil gas detection

来源：评论

学校读者我要写书评

暂无评论

Synthesis and characterization of Na0.44MnO2 nanorods/graphene composite as cathode materials for sodium-ion batteries

引用

Journal of Central South University 2019年第6期26卷 1510-1520页

作者： ZHANG Yue OUYANG Yan LIU Li XIA Jing NIE Su LIU Wen WANG Xian-you National Base for International Science & Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage BatteryHunan Province Key Laboratory of Electrochemical Energy Storage and ConversionKey Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtan 411105China Key Laboratory of Advanced Energy Materials Chemistry of Ministry of Education Nankai UniversityTianjin 300071China

Na0.44MnO2 nanorods have been prepared by a hydrothermal *** experimental parameters have been systematically investigated and *** results show that Na0.44MnO2 nanorods obtained via the hydrothermal treatment at 200℃for 16 h show the best electrochemical properties,which deliver the high initial discharge capacity of 110.7 mA·h/g at 50 mA/g in potential window 2.0-4.0 *** further improve their electrochemical properties,a ball milling process with graphene has been carried out to obtain Na0.44MnO2/graphene *** initial discharge capacity of Na0.44MnO2/graphene composite is 106.9 mA·h/g at a current density of 50 mA/*** 100 cycles,the residual discharge capacity is 91.8 mA·h/g and the capacity retention rate is 85.9%,which is much higher than that of pristine Na0.44MnO2 nanorods(74.7%)at the same *** is more,when the current density reaches 500 and 1000 mA/g,the corresponding discharge capacities of Na0.44MnO2/graphene composite are about 89 and 78 mA·h/g,respectively,indicating outstanding rate capability.

关键词： manganese-based compounds hydrothermal method sodium-ion batteries composite materials

来源：评论

学校读者我要写书评

暂无评论

On the accurate characterization of quantum-dot light-emitting diodes for display applications

引用

npj Flexible Electronics 2022年第1期6卷 351-362页

作者： Wangxiao Jin Yunzhou Deng Bingbing Guo Yaxiao Lian Baodan Zhao Dawei Di Xiaowei Sun Kai Wang Shuming Chen Yixing Yang Weiran Cao Song Chen Wenyu Ji Xuyong Yang Yuan Gao Shuangpeng Wang Huaibin Shen Jialong Zhao Lei Qian Fushan Li Yizheng Jin Key Laboratory of Excited-State Materials of Zhejiang Province State Key Laboratory of Silicon MaterialsDepartment of ChemistryZhejiang University310027 HangzhouChina State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang University310027 HangzhouChina Department of Electronic and Electrical Engineering Southern University of Science and Technology518055 ShenzhenChina TCL Research ShenzhenGuangdongChina Shenzhen China Star Optoelectronics Semiconductor Display Technology Co. LtdShenzhenGuangdongChina College of Chemistry Chemical Engineering and Materials ScienceSoochow University199 Ren’ai Rd215123 SuzhouJiangsuChina Key Lab of Physics and Technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin University130023 ChangchunChina Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University149 Yanchang RoadShanghai 200072China Najing Technology Corporation Ltd Hangzhou 310052China Institute of Applied Physics and Materials Engineering University of MacaoTaipaMacaoSAR 999078China Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technologyand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004China School of Physical Science and Technology MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and MaterialsGuangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China Division of Functional Materials and Nanodevices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China College of Physics and Information Engineering Fuzhou UniversityFuzhou 350108China

Quantum dot light-emitting diodes(QLEDs)are a class of high-performance solution-processed electroluminescent(EL)devices highly attractive for next-generation display *** the encouraging advances in the mechanism investigation,material chemistry,and device engineering of QLEDs,the lack of standard protocols for the characterization of QLEDs may cause inaccurate measurements of device parameters and invalid comparison of different ***,we report a comprehensive study on the characterizations of QLEDs using various *** show that the emission non-uniformity across the active area,nonLambertian angular distributions of EL intensity,and discrepancies in the adopted spectral luminous efficiency functions could introduce significant errors in the device *** errors in the operational-lifetime measurements may arise from the inaccurate determination of the initial luminance and inconsistent methods for analyzing the luminance-decay ***,we suggest a set of recommended practices and a checklist for device characterizations,aiming to help the researchers in the QLED field to achieve accurate and reliable measurements.

关键词： diodes characterization luminous

来源：评论

学校读者我要写书评

暂无评论

Breaking the periodic arrangement of atoms for the enhanced electrochemical reduction of nitrogen and water oxidation

引用

Science China materials 2022年第1期65卷 147-154页

作者： Shilong Jiao Xianwei Fu Shuangchen Ruan Yu-Jia Zeng Hongwen Huang College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China College of Materials Science and Engineering Hunan UniversityChangsha 410082China Key Lab for Special Functional Materials of Ministry of Education Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004China National&Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials Henan UniversityKaifeng 475004China Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China

The development of cost-effective and highperformance electrocatalysts has been increasingly studied to mitigate upcoming energy and environmental *** and heterointerface engineering have played significant roles in the rational design of electrocatalysts and modulation of their electrocatalytic ***,the synergistic effect between amorphization and heterointerfaces has been scarcely *** a proof-of-concept attempt,we develop amorphous FeMo(a-FeMo)electrocatalysts with an abundance of heterointerfaces that are composed of amorphous components and evaluate their electrocatalytic performances toward the nitrogen reduction reaction and oxygen evolution reaction(OER).Benefitting from the synergistic effect between the amorphous nature of the a-FeMo electrocatalysts,which offer a high density of active sites,and significant electron redistribution at the heterointerfaces,the electrocatalysts exhibit a high Faradaic efficiency of 29.15%,an elevated yield rate of 71.78μg_(NH_(3)) mg_(cat.)^(-1) h^(-1) with long-term stability at a potential of-0.1V *** hydrogen electrode and excellent electrocatalytic activity toward the *** study provides a promising and effective method for the rational design of low-cost heterogeneous catalysts with desirable efficiency,selectivity,and stability.

关键词： amorphism and heterointerface nitrogen reduction reaction OER electrocatalyst design electrocatalytic conversion

来源：评论

学校读者我要写书评

暂无评论

基于预连接镍链的高应变敏感度动态可调电磁干扰屏蔽弹性体

引用

Science China materials 2024年第2期67卷 629-641页

作者：卞敬周兴成周翔马林峰朱先军李建民刘淑娟赵强 College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly TechnologyNanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts&TelecommunicationsNanjing 210023China

具有动态可调电磁屏蔽性能的电磁干扰屏蔽材料备受关注,但其目前仍然存在制备复杂、厚度大、触发方式不便、调节范围窄等缺点.我们通过将尖刺镍微粒精确地分散到聚二甲基硅氧烷基体中形成预连接的链状结构,制备出了具有可开关电磁屏蔽... 详细信息

具有动态可调电磁屏蔽性能的电磁干扰屏蔽材料备受关注,但其目前仍然存在制备复杂、厚度大、触发方式不便、调节范围窄等缺点.我们通过将尖刺镍微粒精确地分散到聚二甲基硅氧烷基体中形成预连接的链状结构,制备出了具有可开关电磁屏蔽性能的弹性体材料.弹性体在机械拉伸和释放过程中表现出连续和可逆的电磁干扰屏蔽性能.原始弹性体具有良好的阻抗匹配和低介电损耗,允许大部分电磁波通过.拉伸使预连接的短链彼此接触,在内部形成大量的微尺度导电网络,显著增强了电导损耗能力,实现了较强的电磁干扰屏蔽能力.此外,我们通过无线应变传感系统验证了智能电磁干扰屏蔽弹性体的应用潜力,证明了可穿戴智能电磁干扰屏蔽精确监测人体运动的可能性.

关键词： adjustable electromagnetic interference shielding conductive elastomer electromagnetic sensing negative piezoresistivity

来源：评论

学校读者我要写书评

暂无评论

Self-powered solar-blind photodiodes based on EFG-grown(100)-dominant β-Ga_(2)O_(3) substrate

引用

Chinese Physics B 2021年第1期30卷 483-486页

作者： Xu-Long Chu Zeng Liu Yu-Song Zhi Yuan-Yuan Liu Shao-Hui Zhang Chao Wu Ang Gao Pei-Gang Li Dao-You Guo Zhen-Ping Wu Wei-Hua Tang Laboratory of Information Functional Materials and Devices School of Science&State Key Laboratory of Information Photonics and Optical CommunicationsBeijing University of Posts and TelecommunicationsBeijing 100876China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China The Engineering Research Center for Semiconductor Integrated Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China China Aerospace System Simulation Technology Co. Ltd.(Beijing)Beijing 100195China Division of Interdisciplinary and Comprehensive Research&Platform for Characterization and Test Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Center for Optoelectronics Materials and Devices&Key Laboratory of Optical Field Manipulation of Zhejiang Province Department of PhysicsZhejiang Sci-Tech UniversityHangzhou 310018China School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China College of Electronic and Optical Engineering&College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210046China National and Local Joint Engineering Laboratory for RF Integration and Micro-Packing Technologies Nanjing University of Posts and TelecommunicationsNanjing 210046China

We report the edge-defined-film-fed(EFG)-grown β-Ga_(2)O_(3)-based Schottky *** device has a reverse leakage current of ~nA and a rectified ratio of ~10^(4) at ±5 *** addition,the photodiode detector shows a dark current of 0.3 pA,a photo-responsivity(R) of 2.875 mA/W,a special detectivity(D*) of 10^(10) Jones,and an external quantum efficiency(EQE) of 1.4% at zero bias,illustrating a self-powered *** work may advance the development of the Ga_(2)O_(3)-based Schottky diode solar-blind photodetectors.

关键词： β-Ga_(2)O_(3)substrate Schottky photodiode solar-blind detection

来源：评论

学校读者我要写书评

暂无评论

Expanded [email protected] 2 @ polyaniline Composite with Enhanced Performance as Anode materials for Lithium Ion Batteries

引用

Electrochimica Acta 2017年 240卷 63-71页

作者： Lingguang Yi Li Liu Guoxiong Guo Xiaoying Chen Yue Zhang Shuyang Yu Xianyou Wang National Base for International Science & Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery Hunan Province China Key Laboratory of Electrochemical Energy Storage and Conversion School of Chemistry Xiangtan University Hunan Xiangtan 411105 China

The drastic volume change is the major drawback limiting stannic oxide as an anode material for lithium ion batteries. In this work, three-dimensional (3D) [email protected] 2 @PANI composite is synthesized via solvothermal method followed by in-situ oxidative polymerization. Compare with the bare SnO 2 and [email protected] 2 samples, the rate performance and cycling stability of the [email protected] 2 @PANI sample have been enhanced, which can be attributed to the dual conductive networks of polyaniline (PANI) with expanded graphite (EG). As a result, the 3D [email protected] 2 @PANI composite not only delivers a higher initial columbic efficiency of 77.8%, an excellent initial reversible capacity of 1021 mAh g −1 at a current density of 0.1 A g −1 but also still maintains at 408 mAh g −1 after 100 cycles. And it exhibits enhanced rate performance, which remains at 270 mAh g −1 with 2 A g −1 . Consequently, preparing [email protected] 2 @PANI is a suitable strategy to develop SnO 2 anode materials for lithium batteries.

关键词： Expanded graphite Polyaniline SnO 2 Lithium ion batteries

来源：评论

学校读者我要写书评

暂无评论

Low-Temperature Gas Sensor with Good Long-Term Stability Based on Co3o4/Ti3c2tx Heterojunction

SSRN

引用

SSRN 2023年

作者： Liu, Zhe Mo, Xichao Tian, Shuhao Chen, Jie Liu, Yanpeng Wu, Haiyang Zhao, Yawei Wang, Yanrong Peng, Shanglong National & Locai Joint Engineering Laboratory for Optical Conversion Materials and Technology School of Materials and Energy Lanzhou University Lanzhou730000 China School of Physical Science and Technology Lanzhou University Lanzhou730000 China

As one of the two-dimensional (2D) nanomaterials, MXene exhibits great potential on gas-sensing owing to its high specific area, rich functional groups and great charge transfer mobility. Herein, electrostatic adsorption and calcination strategies were taken for ZIF-derived Co3O4 and alkalized Ti3C2Tx MXene to fabricate Co3O4/MX7.5 heterojunction. It can be found that Co3O4 nanoparticles (NPs) uniformly grow on the surface of alkalized Ti3C2Tx. Alkalized Ti3C2Tx with lower work function (lower than 3.9 eV) can transfer more electrons towards Co3O4 and promote the redox of Co2+. These increased Co2+ ions can help to adsorb more adsorbed oxygen and produce more oxygen defects, which enhances contact interaction between ethanol molecules and adsorption sites. The formation of heterojunction between Co3O4 and MXene is observed by UV-vis spectra, and this interface effect enhances the ability of gas sensors. Therefore, the sensors based on the obtained Co3O4/MX7.5 heterojunction can operate at a relatively low temperature (140°C) with a response of 3500% and a low detection limit of 1 ppm. And it also delivers long-term stability (about 30 days). This work demonstrates practical application for detecting ethanol at a relatively low working temperature and keeping their response in a long term. © 2023, The Authors. All rights reserved.

关键词： Ethanol

来源：评论

学校读者我要写书评

暂无评论

A Temperature Sensitive Cross-Relaxation Strategy In Ba 5 La 3 Mgal 3 O 15:Pr 3+ Toward High Sensitive Temperature Sensing, Photothermochromism Indicator and Patterned Anti-Counterfeiting

SSRN

引用

SSRN 2024年

作者： Li, Chao Long, Mengzhu Li, Bing Zhang, Feng Wang, Yuhua Henan Key Laboratory of Quantum Materials and Quantum Energy Henan University Kaifeng475001 China School of Quantum Information Future Technology Henan University Kaifeng475001 China National and Local Joint Engineering Laboratory for Optical Conversion Materials and Technology of National Development and Reform Commission Department of Materials Science School of Materials and Energy Lanzhou University Lanzhou China

Multi-functional luminescence materials have attracted much attention due to their wide applications in many fields, while there are few reports on the development of multi-functional luminescence materials. Herein, a multi-functional Pr3+ doped Ba5La3MgAl3O15 phosphor has been synthesized. The crystal structure, phase, morphology and luminescence performance of Ba5La3MgAl3O15:Pr3+ have been studied. Ba5La3MgAl3O15:Pr3+ shows noteworthy spectrum overlap between photoluminescence and photoluminescence excitation spectrum in blue-cyan light region. Ba5La3MgAl3O15:Pr3+ phosphor exhibits an excellent resistance to thermal quenching performance (70.2%@423 K) based on the integrated emission intensity, while its emission peak intensities exhibit severely thermal quenching and thermal enhancement in different color ranges, respectively. The cross relaxation of Pr3+ induces signally diverse thermal responses to temperature toward high sensitive temperature sensing performance. Absolute sensitivity Sa value keeps increasing from 0.09% K-1@298 K to 1.39% K-1@523 K, whereas relative sensitivity Sr value gradually decreases from 2.99% K-1@298 K to 0.97% K-1@523 K, suggesting an outstanding temperature sensing capability in a continuous wide temperature range. Ba5La3MgAl3O15:0.5mol%Pr3+ exhibits a cooling-heating measurement repeatability and a low temperature resolution of 0.42 K at 298 K. Furthermore, cross relaxation of Pr3+ in Ba5La3MgAl3O15 induces conspicuously visual temperature-dependent photothermochromism from a pale orange color at 298 K to a true red color at 673 K. A maple leaf and a tulip flower patterns are designed and show visibly temperature sensitive and color changing anti-counterfeit application for Ba5La3MgAl3O15:Pr3+. Based on these properties, Ba5La3MgAl3O15:Pr3+ is a multi-functional luminescence material and has a great potential for applications in the fields of temperature sensing, temperature-dependent photothermochromism indicator and patterned anti

关键词： Phosphors

来源：评论

学校读者我要写书评

暂无评论

engineering the coordination structure of Cu for enhanced photocatalytic production of C_(1) chemicals from glucose

引用

Chinese Journal of Catalysis 2024年第8期63卷 234-243页

作者： Lulu Sun Shiyang Liu Taifeng Liu Dongqiang Lei Nengchao Luo Feng Wang State Key Laboratory of Catalysis Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China National&Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials Collaborative Innovation Center of Nano Functional Materials and Applications of Henan Province Henan UniversityKaifeng 475004HenanChina Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China

Photocatalytic decomposition of sugars is a promising way of providing H_(2),CO,and HCOOH as sus-tainable energy ***,the production of C_(1) chemicals requires the cleavage of robust C−C bonds in sugars with concurrent production of H_(2),which remains ***,the photo-catalytic activity for glucose decomposition to HCOOH,CO(C_(1) chemicals),and H_(2) on Cu/TiO_(2)was enhanced by nitrogen *** to nitrogen doping,atomically dispersed and stable Cu sites resistant to light irradiation are formed on Cu/TiO_(2).The electronic interaction between Cu and nitrogen ions originates valence band structure and defect levels composed of N 2p orbit,distinct from undoped Cu/TiO_(2).Therefore,the lifetime of charge carriers is prolonged,resulting in the pro-duction of C_(1) chemicals and H_(2) with productivities 1.7 and 2.1 folds that of Cu/TiO_(2).This work pro-vides a strategy to design coordinatively stable Cu ions for photocatalytic biomass conversion.

关键词： Cu photocatalyst Coordination structure Biomass C−C bond C_(1) chemicals

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：