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Nanodiamond/Ti_(3.C_(2) MXene-coated quartz crystal microbalance humidity sensor with high sensitivity and high quality factor

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Rare Metals 2024年第6期43卷 2719-2729页

作者： Yao Yao Qiao Chen Yan-Qi Li xian-He Huang wei-wei Ling Zhe-MiaoXie Jia-QiWang Chang-Ming Chen College of Communication engineering Chengdu University of Information TechnologyChengdu 610225China School of Automation Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Automation engineering University of Electronic Science and Technology of ChinaChengdu 611731China Advanced Micro-/Nano-Devices Lab Department of Systems Design EngineeringUniversity of WaterlooWaterlooON N2L 3GlCanada

To address the challenge of achieving both high sensitivity and a high quality factor in quartz crystal microbalance(QCM)humidity sensors,a nanodiamond(ND)/Ti_(3.C_(2)MXene composite-coated QCM humidity sensor was *** material characteristics of ND,Ti_(3.C_(2)MXene,and ND/Ti_(3.C_(2)MXene composite were analyzed by transmission electron microscopy(TEM)and Fourier transform infrared(FTIR)*** experimental results demonstrated that the hydrophilic ND nanoparticles coated on Ti_(3.C_(2) MXene nanosheet prevented the self-stacking of Ti_(3.C_(2)MXene and enhanced the sensitivity of Ti_(3.C_(2) MXene-based QCM humidity ***,the high mechanical modulus of Ti_(3.C_(2) MXene material helped ND/Ti_(3.C_(2)MXene composite-coated QCM humidity sensor to achieve a high quality factor(>20,000).ND/Ti_(3.C_(2)MXene compositecoated QCM humidity sensor exhibited a sensitivity of 82.45 Hz/%RH,a humidity hysteresis of 1.1%RH,fast response/recovery times,acceptable repeatability,and good stability from 11.3.RH to 97.3.*** response mechanism of ND/Ti_(3.C_(2) MXene composite-coated QCM humidity sensor was analyzed in combination with a bi-exponential kinetic adsorption ***,the potential application of ND/Ti_(3.C_(2)MXene composite-coated QCM humidity sensor was demonstrated through its frequency response to wooden blocks with different moisture contents.

关键词： Humidity sensor Quartz crystal microbalance Nanodiamond Ti_(3.C_(2)MXene High quality factor

A NOVEL METHOD FOR CHARACTERIZING THE WHOLE PROCESS OF POLYMER GELATION

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Chinese Journal of Polymer science 2001年第4期19卷 335-339页

作者： Qiang Chen xian-min Zhang Guo-wei Wang Jian Xu State Key Laboratory of Polymer Physics & Chemistry, Center for Molecular science, {3. of Chemistry, Chinese Academy of sciences beijing 100080, china department of information & electronic engineering Zhejiang University, Hangzhou 3.0027, china Tjanjin Polytechnic University,Tianjin 3.0160 中科院化学所高分子物理与化学国家重点实验室北京浙江大学浙江杭州

A novel method was established to investigate the gelation process of polymers. The change of refractive index of a polymer system during gelation was determined in situ in a prismatic cell. It can give reliable information on the whole gelation process. The apparatus and the execution of this technique are illustrated and the error is also discussed.

关键词： gelation process in situ technique refractive index

Feature combination for classifying single-trial ECoG during motor imagery of different sessions

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Progress in Natural science:Materials International 2007年第7期17卷 851-858页

作者： wei Qingguo~(1,2) Meng Fei~1 Wang Yijun~1 gao Xiaorong~1 gao Shangkai~(1**) (1.{3. of Biomedical engineering,School of Medicine,Tsinghua University,beijing 100084,china 2.{3. of electronic engineering,School of information,Nanchang University,Nanchang 3.0029,china) department of Biomedical engineering School of Medicine Tsinghua University Beijing 100084 China department of electronic engineering School of Information Nanchang University Nanchang 330029 China

The input signals of brain-computer interfaces(BCIs)may be either scalp electroencephalogram(EEG)or electrocor- ticogram(ECoG)recorded from subdural *** make BCIs practical,the classifiers for discriminating different brain states must have the ability of session-to-session *** paper proposes an algorithm for classifying single-trial ECoG during motor imagery of different *** features,derived from two physiological phenomena,movement-related potentials(MRP)and event-related desynchronization(ERD),and extracted by common spatial subspace decomposition(CSSD)and waveform mean,are combined to per- form classification *** specific signal processing methods utilized are described in *** algorithm was successfully applied to Data SetⅠof BCI CompetitionⅢ,and achieved a classification accuracy of 91% on test set.

关键词： brain-computer interface(BCI) electrocorticogram(ECoG) session-to-session transfer feature combination movement-related potentials(MRP) event-related desynchronization(ERD)

A multicast routing algorithm with multiple trees

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Journal of Systems engineering and electronics 2005年第2期16卷 426-432页

作者： Cui Xunxue 1,2 , gao wei3.& Fang Hongyu41. New Star Research institute of Applied Technology, Hefei 23.03., P. R. {3. 2. Jiangsu Key Laboratory of Computer information Processing Technology,Soochow University, Suzhou 215006, P. R. {3. 3. department of electronic engineering and information science,University of science and Technology of {3., Hefei 23.027, P. R. {3. 4. School of electronic science and Technology, Anhui University, Hefei 23.03., P. R. {3. New Star Research institute of Applied Technology Hefei 230031 P. R. China 2. Jiangsu Key Laboratory of Computer information Processing Technology Soochow University Suzhou 215006 P. R. China department of electronic engineering and {3. science University of Science and Technology of China Hefei 230027 P. R. China School of electronic science and Technology Anhui University Hefei 230039 P. R. China

Quality of service (QoS) multicast routing has continued to be a very important research topic in the Internet. A method of multicast routing is proposed to simultaneously optimize several parameters based on multiobjective genetic algorithm, after the related work is reviewed. The contribution lies on that the selection process of such routing is treated with multiobjective optimization. Different quality criterions in IP network are taken into account for multicast communications. A set of routing trees is generated to approximate the Pareto front of multicast problem. Multiple trees can be selected from the final set of nondominated solutions, and applied to obtain a good overall link cost and balance traffic distribution according to some simulation results.

关键词： multicast routing quality of service multiobjective optimization genetic algorithms.

The mutation analysis of ultrasonic acoustic emission in plant stem

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The mutation analysis of ultrasonic acoustic emission in pla...

The Xylem Cavitation Diagnosis Technology Based on Ultrasonic Acoustic Emissions

2011年全国压电和声波理论及器件应用研讨会

作者： Jian-xin WANG~(1,*) Mei-li SUI~2 Shi-feng YANG~3.xian-wei gao~1 1 {3. of electronic and information engineering,beijing electronic science and Technology institute,beijing 100070,china 2 beijing Senior Expert Technology Center Chinese Academy of sciences,beijing 100046,china 3.College of electronic information and Automation,Tianjin University of science And Technology,Tianjin 3.0222, china

＜正＞Produced by cohesion between water molecules or adhesion to the conduits wall,the plant cavitation is accompanied by the vessel walls vibration which is the indicator of the water *** ultrasonic acoustic emissi... 详细信息

关键词： ultrasonic acoustic emissions UAEs mutation model

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The Xylem Cavitation Diagnosis Technology Based on Ultrasoni...

A new transpiration-embolism curve model based on ultrasonic acoustic emissions

2011年全国压电和声波理论及器件应用研讨会

＜正＞Studies have shown that acoustic emission is associated with the phenomenon of cavitation in the plant xylem stem. Because the water columns in negative pressure are unstable,the lower the pressure becomes,the g... 详细信息

关键词： water deficit ultrasonic acoustic emissions UAEs

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A new transpiration-embolism curve model based on ultrasonic...

Flexible polydimethylsiloxane pressure sensor with micro-pyramid structures and embedded silver nanowires:A novel application in urinary flow measurement

2011年全国压电和声波理论及器件应用研讨会

＜正＞Ultrasoinc acoustic emissions（UAEs） can be used as index of plant water *** paper analyses the relationship between UAEs and transpiration *** order to avoid background noise interference,the UAEs detecting frequency is more than 100 *** PCI-2 data acquisition card and R15 piezoelectric transducer are used to improve the precision of UAEs signals *** relationships between the conduits embolism and

关键词： Piezoelectric Transducer Ultrasonic Acoustic Emissions UAEs Transpiration-Embolism Curve

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Nanotechnology and Precision engineering 2024年第3期7卷 1-12页

作者： Ben-Song Wang Ang gao Song-wei Huang Qi-Hong Ning Cheng Zhou Qi-xiang Song Da-xiangCui School of electronic information and Electrical engineering Shanghai Jiao Tong UniversityShanghai 200240China department of Urology Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200240China

Flexible pressure sensors are lightweight and highly sensitive,making them suitable for use in small portable devices to achieve precise measurements of tiny *** article introduces a low-cost and easy-fabrication strategy for piezoresistive flexible pressure *** embedding silver nanowires into a polydimethylsiloxane layer with micro-pyramids on its surface,a flexible pressure sensor is created that can detect low pressure (17.3.Pa) with fast response (<20 ms) and high sensitivity (69.6 mA kPa-1).Furthermore,the pressure sensor exhibits a sensitive and stable response to a small amount of water flowing on its *** this basis,the flexible pressure sensor is innovatively combined with a micro-rotor to fabricate a novel urinary flow-rate meter (uroflowmeter),and results from a simulated human urination experiment show that the uroflowmeter accurately captured all the essential shape characteristics that were present in the pump-simulated urination *** ahead,this research provides a new reference for using flexible pressure sensors in urinary flow-rate monitoring.

关键词： Flexible pressure sensor Silver nanowires Portable device Uroﬂowmeter Healthcare

Circularly polarized light emission and detection by chiral inorganic semiconductors

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Frontiers of Optoelectronics 2024年第2期17卷 43-49页

作者： Zha Li Wancai Li Dehui Li wei Tang Huageng Liang Huaibing Song Chao Chen Liang gao Jiang Tang Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China School of Optical and electronic information Huazhong University of Science and TechnologyWuhan 430074China International Health Care Center National Center for Global Health and MedicineTokyo 162‑8655Japan Hepato‑Biliary‑Pancreatic Surgery Division Department of SurgeryThe University of Tokyo HospitalTokyo 113‑8655Japan department of Urology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430074China Faculty of Materials science and Chemistry China University of GeosciencesWuhan 430074China

Chiral inorganic semiconductors with high dissymmetric factor are highly desirable,but it is generally difficult to induce chiral structure in inorganic semiconductors because of their structure rigidity and *** this study,we introduced chiral ZnO film as hard template to transfer chirality to CsPbBr_(3. film and PbS quantum dots(QDs)for circularly polarized light(CPL)emission and detection,*** prepared CsPbBr_(3./ZnO thin film exhibited CPL emission at 520 nm and the PbS QDs/ZnO film realized CPL detection at 780 nm,featuring high dissymmetric factor up to around *** electron transition based mechanism is responsible for chirality transfer.

关键词： High dissymmetric factor Circularly polarized light emission Semiconductor Hard template,Chirality