检索结果-内蒙古大学图书馆

Monitoring the adulteration of milk with melamine: a visualised sensor array approach

FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT 2013年第5期30卷 786-795页

作者： Yang, Limin Huo, Danqun Jiang, Yuhao Hou, Changjun Zhang, Suyi China Univ Petr East China Ctr Bioengn & Biotechnol Qingdao Peoples R China Chongqing Univ Coll Bioengn Chongqing 630044 Peoples R China Luzhou Laojiao Grp Co Ltd Natl Engn Res Ctr Solid State Brewing Luzhou Sichuan Peoples R China

Melamine, a toxic triazine, is illegally used as an additive in milk to apparently increase the amount of protein, causing acute renal failure in thousands of Chinese infants. In this study, a rapid, simple, sensitive and selective colourimetric sensor array is reported as a potential screening tool for monitoring the adulteration of raw milk with melamine. Using chemically responsive dyes (mainly porphyrins and pH indicators) as the recognition elements, determination of melamine at different concentrations (0.1, 0.5, 1.0, 1.5 and 2.0mgkg(-1)) and a detection limit of 0.1mgkg(-1) were achieved because of diverse and strong molecular interactions. Furthermore, the colourimetric sensor array was successfully able to discriminate between melamine and its analogues. The unique fingerprint of melamine was obtained with a novel signal processing method named two-step subtraction, which made it possible for the detection results to be easily observed with the naked eye even without any statistical analysis. In addition, the process including sample pre-treatment and detection process took only 12min at room temperature. The merits (such as simplicity, rapidity, low cost, visual colourimetry, sensitivity and selectivity) make the proposed method especially useful for on-site screening of melamine levels in milk.

关键词： melamine melamine analogues chemically responsive dyes sensor array visual detection

来源：评论

学校读者我要写书评

暂无评论

Combined Use of FSR sensor array and SVM Classifier for Finger Motion Recognition Based on Pressure Distribution Map

引用

Journal of Bionic Engineering 2012年第1期9卷 39-47页

作者： Nan Li Dapeng Yang Li Jiang Hong Liu Hegao Cai State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin 150080P.R.China

For controlling dexterous prosthetic hand with a high number of active Degrees of Freedom （DOF）, it is necessary to reliably extract control volitions of finger motions from the human body. In this study, a large variety of finger motions are discriminated based on the diversities of the pressure distribution produced by the mechanical actions of muscles on the forearm. The pressure distribution patterns corresponding to the motions were measured by sensor array which is composed of 32 Force Sensitive Resistor （FSR） sensors. In order to map the pressure patterns with different finger motions, a multiclass classifier was designed based on the Support Vector Machine （SVM） algorithm. The multi-subject experiments show that it is possible to identify as many as seventeen different finger motions, including individual finger motions and multi-finger grasping motions, with the accuracy above 99% in the in-session validation. Further, the cross-session validation demonstrates that the performance of the proposed method is robust for use if the FSR array is not reset. The results suggest that the proposed method has great application prospects for the control of multi-DOF dexterous hand prosthesis.

关键词： finger motion recognition dexterous hand support vector machine sensor array pressure distribution map

来源：评论

学校读者我要写书评

暂无评论

Overcoming the Limits of Cross-Sensitivity:Pattern Recognition Methods for Chemiresistive Gas sensor array

引用

Nano-Micro Letters 2024年第12期16卷 285-341页

作者： Haixia Mei Jingyi Peng Tao Wang Tingting Zhou Hongran Zhao Tong Zhang Zhi Yang Key Lab Intelligent Rehabil&Barrier Free Disable(Ministry of Education) Changchun UniversityChangchun 130022People’s Republic of China Shanghai Key Laboratory of Intelligent Sensing and Detection Technology School of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237People’s Republic of China National Key Laboratory of Advanced Micro and Nano Manufacture Technology Department of Micro/Nano ElectronicsSchool of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012People’s Republic of China

As information acquisition terminals for artificial olfaction,chemiresistive gas sensors are often troubled by their cross-sensitivity,and reducing their cross-response to ambient gases has always been a difficult and important point in the gas sensing *** recognition based on sensor array is the most conspicuous way to overcome the cross-sensitivity of gas *** is crucial to choose an appropriate pattern recognition method for enhancing data analysis,reducing errors and improving system reliability,obtaining better classification or gas concentration prediction *** this review,we analyze the sensing mechanism of crosssensitivity for chemiresistive gas *** further examine the types,working principles,characteristics,and applicable gas detection range of pattern recognition algorithms utilized in gas-sensing ***,we report,summarize,and evaluate the outstanding and novel advancements in pattern recognition methods for gas *** the same time,this work showcases the recent advancements in utilizing these methods for gas identification,particularly within three crucial domains:ensuring food safety,monitoring the environment,and aiding in medical *** conclusion,this study anticipates future research prospects by considering the existing landscape and *** is hoped that this work will make a positive contribution towards mitigating cross-sensitivity in gas-sensitive devices and offer valuable insights for algorithm selection in gas recognition applications.

关键词： Pattern recognition sensor array Chemiresistive gas sensor Cross-sensitivity Artificial olfactory

来源：评论

学校读者我要写书评

暂无评论

sensor array based measurement technique for fast-responding cigarette smoke analysis

引用

sensorS AND ACTUATORS B-CHEMICAL 2005年第1期107卷 479-489页

作者： Ködderitzsch, P Bischoff, R Veitenhansl, P Lorenz, W Bischoff, G Univ Halle Wittenberg Inst Analyt & Environm Chem D-06120 Halle An Der Saale Germany Sensobi Sensoren GmbH D-06120 Halle An Der Saale Germany

The developed non-specific sensor arrays provide a simple, non-invasive technique for monitoring changes in combustion products of a cigarette. An online measurement technique that has incorporated an array of conducting polymers, was tested for continuous smoke analysis of a burning cigarette, simulating the process which a smoker performs having a smoke. On account of the large humidity concentration inside the vapour, analysis of small aerosol volumes within a cigarette puff were performed without any precondition. Therefore, the smoke was conducted from the filter side of the cigarette directly to the sensor array interrupted by reference gas flushing. The scope of the experiment here illustrated was to reproduce the classification properties of sensorial analysis and qualify the sensorial descriptor by the help of signal pattern analysis. Results demonstrate the capability of such a sensor array system to be trained according to the behaviour of a practical panel of tasters. The topography of the innovative sensors, which produce reliable signals over several months without aging, is visualized with atomic force microscopy. Therewith the molecular self-associated polymer-structures are shown. (c) 2004 Elsevier B.V. All rights reserved.

关键词： cigarette smoke analysis sensor array conducting polymers pattern recognition self-associated polymer-structures

来源：评论

学校读者我要写书评

暂无评论

Simultaneous determination of Tl(I) and In(III) using a voltammetric sensor array

引用

sensorS AND ACTUATORS B-CHEMICAL 2017年 245卷 18-24页

作者： Perez-Rafols, Clara Serrano, Nuria Manuel Diaz-Cruz, Jose Arino, Cristina Esteban, Miguel Univ Barcelona Dept Engn Quim & Quim Analit Fac Quim Marti & Franques 1-11 E-08028 Barcelona Spain

A sensor array consisting of a chemically modified sensor in which 4-carboxybenzo-18-crown-6 was immobilized onto a screen-printed carbon rianofiber-modified electrode (crown-6-SPCNFE) and an ex-situ antimony film deposited on a screen-printed carbon nanofiber-modified electrode (exsitu-SbSPCNFE) was applied for the resolution of the strong overlapped signals resulting from the simultaneous determination of TI(I) and In(III) by stripping voltammetry. A Partial Least Squares model was constructed and good calibration curves of predicted vs. expected concentrations of the considered metal ions, with correlation coefficients higher than 0.98 for both training and test sets, were obtained. These results provided by the sensor array were compared with those obtained by a single electrode. Moreover, this sensor array was successfully applied for the voltammetric determination of both TI(I) and In(III) in tap water, providing comparable results to those obtained by ICP-MS measurements. (C) 2017 Elsevier B.V. All rights reserved.

关键词： sensor array Metal ions Stripping voltammetry Screen-printed electrodes Modified electrodes Partial least squares

来源：评论

学校读者我要写书评

暂无评论

Design and Characterisation of a Non-Contact Flexible sensor array for Electric Potential Imaging Applications

引用

IEEE sensorS JOURNAL 2021年第23期21卷 26328-26336页

作者： Pouryazdan, Arash Costa, Alio C. Garcia-Garcia, Leonardo Lugoda, Pasindu Prance, Robert J. Prance, Helen Munzenrieder, Niko Univ Sussex Sensor Technol Res Ctr Flexible Elect Lab Brighton BN1 9QT E Sussex England Univ Sussex Falmer Sensor Technol Res Ctr Flexible Elect Lab Brighton BN1 9QT E Sussex England Free Univ Bozen Bolzano Fac Sci & Technol I-39100 Bolzano Italy

Capacitivenon-contact imaging of electric fields and potentials with micro-metre resolution can provide relevant insights into material characterisation, structural analysis, electrostatic charge imaging and bio-sensing applications. However, scanning electric potential microscopes have been confined to rigid and single-probe devices, making them slow, prone to mechanical damage and complex to fabricate. In this work, we present the design and characterisation of a novel 5-element flexible array of electric potential probes with spatial resolution down to 20 mu m to speed up the scanning time. This was achieved by combining flexible thin-film probes for active guarding and shielding with state-of-the art discrete conditioning circuits. The potential of this approach is showcased by using the fabricated array to image latent fingerprints deposited on an insulating surface by contact electrification, obtain the surface topography of conductive samples and to visualise local dielectric variations.

关键词： Flexible electronics capacitive sensors electric potential imaging sensor array

来源：评论

学校读者我要写书评

暂无评论

Pico-strain multiplexed fiber optic sensor array operating down to infra-sonic frequencies

引用

OPTICS EXPRESS 2009年第13期17卷 11077-11087页

作者： Littler, Ian C. M. Gray, Malcolm B. Chow, Jong H. Shaddock, Daniel A. McClelland, David E. Australian Natl Univ Ctr Gravitat Phys Res Sch Phys & Engn Canberra ACT 0200 Australia

An integrated sensor system is presented which displays passive long range operation to 100 km at pico-strain (p epsilon) sensitivity to low frequencies (4 Hz) in wavelength division multiplexed operation with negligible cross-talk (better than -75 dB). This has been achieved by pre-stabilizing and multiplexing all interrogation lasers for the sensor array to a single optical frequency reference. This single frequency reference allows each laser to be locked to an arbitrary wavelength and independently tuned, while maintaining suppression of laser frequency noise. With appropriate packaging, such a multiplexed strain sensing system can form the core of a low frequency accelerometer or hydrophone array. (C) 2009 Optical Society of America

关键词： .Fiber Optic large-scale optical fiber laser frequency Hydrophone Remotely cross-talk interrogation accelerometer Multiplexing Multiplexed FIBER BRAGG TDM sensor array sensor system frequency reference Pico-strain

来源：评论

学校读者我要写书评

暂无评论

A sensor array based on trigonal-selenium nanowires for the detection of gas mixtures

引用

sensorS AND ACTUATORS B-CHEMICAL 2016年 223卷 131-137页

作者： Akiyama, Norio Okayama Univ Sci Dept Elect & Elect Engn Okayama 7000005 Japan

A simple array-type gas sensor was fabricated using trigonal-selenium nanowires and its ability to detect volatile organic compounds was investigated. The time delays between sensor signals resulting from the varying diffusion velocities of gaseous organic compounds were assessed. The analysis of a model mixture of acetone and benzene was demonstrated. This sensor can operate at room temperature without any heating requirements and shows potential as a device of low power consumption and a low cost gas analysis system capable of differentiating the components of mixed gases. (C) 2015 Elsevier BY. All rights reserved.

关键词： Se nanowires sensor array Time delays Gas analysis Gas mixture

来源：评论

学校读者我要写书评

暂无评论

Multi-functional stretchable and flexible sensor array to determine the location, shape, and pressure: Application in a smart robot

引用

Science China(Technological Sciences) 2018年第8期61卷 1137-1143页

作者： HAN LiBiao DING JianNing WANG Shuai XU Jiang YUAN NingYi CHENG GuangGui LIU ZunFeng Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou University Micro/Nano Science and Technology Center Jiangsu University State Key Laboratory of Medicinal Chemical Biology Key Laboratory of Functional Polymer

The rapid increase in the aging population prompts the development of wearable devices and sophisticated robots. With their ability to collect complex information about their surroundings via e-skins, robots could perform more dynamic and variable tasks such as rescue missions or caring for the elderly. In this paper, we present a new concept of utilizing a very simple, highly flexible and stretchable capacitor sensor array, that can be attached on the surface of a retractable robot hand to realize three functions: determining the location, shape, and pressure of an object. This adaptive sensing system is accomplished using capacitors connected by aligned carbon nanotube(CNT) films constructed on an elastomer dielectric material, which can reduce the requirement on the accuracy of the machine vision system. This study has a very broad application in the manufacture of intelligent software robots.

关键词： sensor array stretchable location shape pressure

来源：评论

学校读者我要写书评

暂无评论

Construction of MoS2 field effect transistor sensor array for the detection of bladder cancer biomarkers

引用

Science China Chemistry 2020年第7期63卷 997-1003页

作者： Yujie Yang Bo Zeng Yingxue Li Huageng Liang Yanbing Yang Quan Yuan Key Laboratory of Analytical Chemistry fo r Biology and Medicine(Ministry of Education) College of Chemistry and Molecular SciencesWuhan UniversityWuhan 430072China Institute of Chemical Biology and Nanomedicine State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China Department of Urology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Key Laboratory fo r Micro-fNano-Optoelectronic Devices of Ministry of Education School of Physics and ElectronicsHunan UniversityChangsha 410082China

Bladder cancer is one of the commonest malignant tumors of urinary system with high recurrence. However, currently developed bladder cancer urine diagnosis methods are hindered by the low detection sensitivity and accuracy. Herein, a molybdenum disulfide(MoS2) nanosheets-based field effect transistor(FET) sensor array was constructed for simultaneous detection of multiple bladder cancer biomarkers in human urine. With the excellent electronic property of MoS2 and the high specific identification capability of recognition molecules, the proposed biosensor array could simultaneously detect nuclear matrix protein 22(NMP22) and cytokeratin 8(CK8) with a wide linear range of 10-6–10-1 pg mL-1 and an ultra-low detection limit of 0.027 and 0.019 aM, respectively. Furthermore, this highly sensitive and specific MoS2 FET sensor array could be used to identify bladder cancer biomarkers from human urine samples. This designed high-performance biosensor array shows great potential in the future diagnosis of bladder cancer.

关键词： MoS 2 field effect transistor bladder cancer sensor array NMP22 CK8

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：