The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011最新文献

Interleaved partitioning PTS with new phase factors for PAPR reduction in OFDM systems 用于OFDM系统中PAPR降低的新相位因子交错分割PTS

The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011 Pub Date : 2011-07-12 DOI: 10.1109/ECTICON.2011.5947849

Jaturong Sarawong, Tanairat Mata, P. Boonsrimuang, Hideo Kobayashi

引用次数: 21

Speeding up a large logistics optimization problems using GPU technology 利用GPU技术加速解决大型物流优化问题

The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011 Pub Date : 2011-05-17 DOI: 10.1109/ECTICON.2011.5947872

Ganid Srimool, P. Uthayopas, Juta Pichitlamkhen

引用次数: 3

Wireless signal uplink transmission on existing optical gigabit ethernet links without using additional light source and baseband filtering 无线信号上行传输在现有的光千兆以太网链路，不使用额外的光源和基带滤波

The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011 Pub Date : 2011-05-17 DOI: 10.1109/ECTICON.2011.5947839

U. Mankong, Rachan Boonjuaejan, Anucha Kakoona

引用次数: 1

An optical artificial nose system for odor classifications based on LED arrays 基于LED阵列的气味分类光学人工鼻子系统

The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011 Pub Date : 2011-05-17 DOI: 10.1109/ECTICON.2011.5947792

S. Kladsomboon, M. Lutz, Tawee Pongfay, T. Kerdcharoen

{"title":"An optical artificial nose system for odor classifications based on LED arrays","authors":"S. Kladsomboon, M. Lutz, Tawee Pongfay, T. Kerdcharoen","doi":"10.1109/ECTICON.2011.5947792","DOIUrl":"https://doi.org/10.1109/ECTICON.2011.5947792","url":null,"abstract":"Optical electronic nose (olfactory sensing) technologies have recently become a convenient technique to identify the quality of food and beverage products based on the odor classification. In this paper, we reported an optical-based electronic nose system consisting of thin-film sensing materials, array of light emitting diode (LED), photo-detector and pattern recognition program. The organic mixtures thin film gas sensor was prepared by spin coating of Zinc-2,9,16,23- tetra- tert-butyl-29H,31H-phthalocyanine (ZnTTBPc), Zinc-5,10,15,20-tetra-phenyl-21H,23H-porphyrin (ZnTPP) and manganese(III)-5,10,15,20-tetra-phenyl-21H,23H-porphyrin chloride (MnTPPCl) onto a clean glass substrate. The electronic nose system was developed by using the low-cost LED array as a light source. Then the light intensity that is transmitted through the organic thin film during the experiment was detected by the color light to frequency converter device (photo-detector). The ability of this system was tested by using volatile organic compound (VOCs) vapors such as methanol, ethanol, and isopropanol. Principal component analysis (PCA) has been used as the pattern recognition for this electronic nose system. The result confirms that the sensing layer that composed of the three types of organic compounds described the groups of chemical vapors by using the array of LED.","PeriodicalId":123701,"journal":{"name":"The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116979892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Design and implementation of a 1 GHz GaN HEMT class-F power amplifier for transistor model evaluation 用于晶体管模型评估的1 GHz GaN HEMT f类功率放大器的设计与实现

The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011 Pub Date : 2011-05-17 DOI: 10.1109/ECTICON.2011.5947794

Charinrat Wongtanarak, S. Chalermwisutkul

{"title":"Design and implementation of a 1 GHz GaN HEMT class-F power amplifier for transistor model evaluation","authors":"Charinrat Wongtanarak, S. Chalermwisutkul","doi":"10.1109/ECTICON.2011.5947794","DOIUrl":"https://doi.org/10.1109/ECTICON.2011.5947794","url":null,"abstract":"Besides linearity, gain and output power, efficiency is an important issue for power amplifiers in wireless communication systems. Since power amplifiers are components which consume the major power in the entire system, improving power amplifiers' efficiency leads to significant improvement of the system's efficiency. One of the amplifier design concepts for efficiency enhancement is class-F power amplifier where the power transistor is operated as a switch. In order to obtain high power, the output voltage of the “off” state should be high, whereas the current should be zero. Thus, it is advantageous to use a power device with high breakdown voltage. This property is offered by power devices based on wide-bandgap semiconductor materials e.g. SiC, InP or GaN with GaN transistors as the most wide-spread and promising high frequency power devices. In addition GaN-based transistors offer also other advantages e.g. high power density, high frequency and temperature of operation, wide bandwidth, high output impedance for easy matching, etc… This paper proposes a high efficiency class-F power amplifier based on GaN HEMT with the operating frequency of 1 GHz. The optimum load and source impedance for the proposed class-F power amplifier are determined using load- and source-pull simulations. The output matching network was designed including harmonic resonators up to 5th harmonic. During the design process, the parasitics of the device's package are also taken into account in order to achieve the optimal class-F load condition at the intrinsic drain of the transistor inside the package. The fabricated class-F power amplifier achieved a maximum power added efficiency (PAE) of 68.45%. Simulation and measurement results have shown good agreement which confirms the accuracy of the device model under realistic condition of operation as a power device for a class-F power amplifier.","PeriodicalId":123701,"journal":{"name":"The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117246477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

A novel approach for quantification of retinal vessel tortuosity based on principal component analysis 一种新的基于主成分分析的视网膜血管弯曲度定量方法

The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011 Pub Date : 2011-05-17 DOI: 10.1109/ECTICON.2011.5948017

Rashmi Turior, Danu Onkaew, T. Kondo, B. Uyyanonvara

引用次数: 8

Enhanced illumination balancing with Neural Network for improved degraded scanned text-photo images 基于神经网络的改进退化扫描文本图像照明平衡

The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011 Pub Date : 2011-05-17 DOI: 10.1109/ECTICON.2011.5948007

M. Athimethphat, Kong Kritayakirana

引用次数: 2

Customer Failure Modes prediction for Hard Disk Drive using Neural Networks Rank-Level Fusion 基于神经网络等级融合的硬盘客户故障模式预测

The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011 Pub Date : 2011-05-17 DOI: 10.1109/ECTICON.2011.5947878

Waraporn Tepin, Yuttana Kidjaidure

引用次数: 5

Electrochemical cholesterol sensing system with electropolymerized carbon nanotube electrode 电聚合碳纳米管电极的电化学胆固醇传感系统

The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011 Pub Date : 2011-05-17 DOI: 10.1109/ECTICON.2011.5947759

A. Wisitsoraat, C. Karuwan, D. Phokharatkul, A. Sapphat, T. Pogfay, A. Tuantranont

{"title":"Electrochemical cholesterol sensing system with electropolymerized carbon nanotube electrode","authors":"A. Wisitsoraat, C. Karuwan, D. Phokharatkul, A. Sapphat, T. Pogfay, A. Tuantranont","doi":"10.1109/ECTICON.2011.5947759","DOIUrl":"https://doi.org/10.1109/ECTICON.2011.5947759","url":null,"abstract":"In this work, a practical cholesterol electrochemical sensing system is developed based on electropolymerized CNTs electrode and low cost potentiostat. Cholesterol sensor is fabricated by two-step electrochemical polymerized enzyme immobilization on a vertically aligned CNT electrode. Vertically aligned CNTs are selectively grown on a 1 mm2 window of gold coated SiO2/Si substrate by thermal chemical vapor deposition (CVD) with water-assisted etching. CNTs are then simultaneously functionalized and enzyme immobilized by electrochemical polymerization of polyaniline and cholesterol enzymes. Subsequently, ineffective enzymes are removed and new enzymes are electrochemically recharged. Scanning electron microscopic characterization indicates polymer-enzyme nanoparticle coating on CNT surface. Cyclic voltammogram (CV) measurements in cholesterol solution show the oxidation and reduction peaks centered around 450 and −220 mV, respectively. An approximately linear relationship between the cholesterol concentration and the response current could be observed in the concentration range of 50–300 mg/dl with a sensitivity of approximately 0.22 µA/mg·dl−1, which is considerably higher compared to previously reported CNT bioprobe. Therefore, the electropolymerized CNT bioprobe is promising for cholesterol detection in normal cholesterol concentration in human blood.","PeriodicalId":123701,"journal":{"name":"The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127355945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Low power fully differential, feed-forward compensated bulk driven OTA 低功率全差动，前馈补偿散装驱动OTA

The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011 Pub Date : 2011-05-17 DOI: 10.1109/ECTICON.2011.5947778

S. Rekha, T. Laxminidhi

引用次数: 10