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International conference on Intelligent systems applications in Multi-modal Information Analytics, 2019

作者： xu, Guangnian Zhu, Jiguang Ruan, Guolian Ci, xujia The Promotion Center for Preparation and Application Technology of Nano-Functional Composite Materials Lu’an China Anhui Provincial Key Laboratory of Biomimetic Sensor and Detecting Technology West Anhui University Lu’anAnhui237012 China

ISBN: (纸本)9783030157388

One-dimensional silver nanowires with uniform diameters and different aspect ratios were solvothermally synthesized by reducing silver nitrate with ethylene glycol(EG) in the presence of poly(vinylpyrrolidone) (PVP) and ferric chloride (FeCl3) at different temperatures for a certain time. The effects of reaction temperature on the yield and morphology of silver nanowires were carried out to discuss by a series of experiments, then the products were purified and characterized by ultraviolet-visible spectroscopy, x-ray diffractometer and field emission scanning electron microscopy, respectively. The experimental results indicated that although silver nanowires were formed from 145Â ℃ to 170Â ℃, the silver nanowires had the highest yield and the most uniform aspect ratio when the reaction temperature was 155Â ℃ for 2.5Â h in polytetrafluoroethylene autoclave. © 2019, Springer Nature Switzerland AG.

关键词： Scanning electron microscopy

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Energy Aware Optimized Hierarchical Routing Technique for Wireless sensor Networks 3rd

Energy Aware Optimized Hierarchical Routing Technique for Wi...

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3rd International conference on advanced Machine Learning Technologies and applications (AMLTA)

作者： Hamza, Nermeen M. El-said, Shaimaa Ahmed Attia, Ehab Rushdy Mohamed Abdalla, Mahmoud Ibrahim Zagazig Univ Elect & Commun Dept Fac Engn Zagazig Egypt Zagazig Univ Fac Comp & Informat Zagazig Egypt

ISBN: (纸本)9783319746906;9783319746890

Wireless sensor Networks (WSNs) ordinarily be composed of a large number of low-power sensor nodes which having several functions, that are a battery powered, and thus have very limited energy capacity. To lengthen the operational lifetime of a sensor network, energy efficiency should be considered in every aspect of sensor network design. In this paper, Enhanced Hierarchical Routing Technique (EHRT) is proposed to overcome the constraint of limited energy capacity of sensor nodes which enhancing the network lifetime and the energy efficiency. The suggested technique is a cluster-based routing which optimizes the low-energy adaptive clustering hierarchy routing technique (LEACH) by using a modified artificial fish swarm algorithm (AFSA). This modified AFSA selects the optimum clusters' head (CHs) locations by applying a number of behaviors following, preying and swarming on each cluster separately and using a modified fitness function to compare these behaviors' outputs to select the best CHs locations for each cluster separately. A framework for evaluating the performance is constructed and applied to verify the efficiency of the suggested technique comparing to other energy efficient routing techniques;optimized hierarchical routing technique (OHRT), low-energy adaptive clustering hierarchy (LEACH), and particle swarm optimized (PSO) routing techniques. The proposed technique yields best results than other techniques OHRT, LEACH, and PSO in terms of energy consumption and network lifetime. It reduces the energy dissipation by factor 0.7 compared with OHRT.

关键词： Wireless sensor networks (WSNs) Cluster-based routing technique Low energy adaptive clustering hierarchy routing technique (LEACH) Artificial fish swarm algorithm (AFSA) Enhanced hierarchical routing technique (EHRT)

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Demo Abstract: Pible: Battery-Free Mote for Perpetual Indoor BLE applications 5

Demo Abstract: Pible: Battery-Free Mote for Perpetual Indoor...

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5th ACM International conference on systems for Built Environments (BuildSys)

作者： Fraternali, Francesco Balaji, Bharathan Agarwal, Yuvraj Benini, Luca Gupta, Rajesh Univ Calif San Diego San Diego CA 92103 USA Univ Calif Los Angeles Los Angeles CA USA Carnegie Mellon Univ Pittsburgh PA 15213 USA Univ Bologna ETH Zurich Bologna Italy

ISBN: (纸本)9781450359511

As of today, large-scale wireless sensor networks are adopted for smart building applications as they are easy and flexible to deploy. Low-power wireless nodes can achieve multi-year lifetimes with an AA battery using Bluetooth Low Energy (BLE) and Zig-Bee. However, replacing these batteries at scale is a non-trivial, labor-intensive task. Energy harvesting has emerged as a potential solution to avoid battery replacement but requires compromises such as application specific sensor node design, simplified communication protocol or reduced quality of service. We show the design of a battery-free sensor node using commercial off the shelf components, and present Pible: a Perpetual Indoor BLE sensor node that uses an ambient light energy harvesting system and can support numerous smart building applications. We show trade-offs between node-lifetime, quality of service and light availability and present a predictive algorithm that adapts to changing lighting conditions to maximize node lifetime and application quality of service.

关键词： Smart Buildings Wireless sensor Network Energy-Harvesting

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High throughput optical analysis and sorting of cells and particles in microfluidic systems 17

High throughput optical analysis and sorting of cells and pa...

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conference on Microfluidics, BioMEMS, and Medical Microsystems xVII

作者： Geiger, Daniel Neckernuss, Tobias Pfeil, Jonas Schwilling, Patricia Marti, Othmar Univ Ulm Albert Einstein Allee 11 D-89081 Ulm Germany

ISBN: (数字)9781510623934

ISBN: (纸本)9781510623934

Nowadays, high-speed video microscopy is used in many applications like microrheology(1,2) or flow cytometry(3) to measure mechanical properties of cells or to identify their type. Typically, high-speed cameras use buffering to reach very high frame rates due to the limited bandwidth of the interface to a PC like Ethernet or USB. Additionally, analysis of large data is compute-intense and in many cases difficult to do online. We developed a system that consists of a high speed CMOS image sensor combined with a field programmable gate array (FPGA) and a pulsed LED illumination system. Due to an image transformation that is done on the FPGA, the dimensionality of the data is reduced without loss of important information. This leads to a significant reduction of the amount of data as well as to noise reduction as a side effect. Furthermore, we developed a modular analysis toolkit that can be used to do the whole analysis directly on the same FPGA online so that buffering is not required and measurements can run continuously on high frame rates. Hence, we can analyze a large total number of objects at very high throughput rates in microfluidic devices. We present the analysis of diluted whole blood in a microfluidic system with our device as well as a sorting application that uses multiple regions of interest that are observed simultaneously so that particles can be analyzed before and after a manipulation or gate.

关键词： microfluidics data processing optical analysis sorting real-time

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Accelerometer-based human activity recognition using 1D convolutional neural network

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IOP conference Series: Materials Science and Engineering 2021年第1期1031卷

作者： S Tsokov M Lazarova A Aleksieva-Petrova Technical University of Sofia Faculty of Computer Systems and Technologies Department Computer Systems 8 Kliment Ochridsky blvd. Sofia 1000 Bulgaria

Human activity recognition (HAR) is an important research field with a variety of applications in healthcare monitoring, fitness tracking and in user-adaptive systems in smart environments. The performance of the activity recognition system is highly dependent on the features extracted from the sensor data which makes the selection of appropriate features a very important part of HAR. A 1D CNN model trained on accelerometer data is suggested in the paper for automatic feature extraction in a HAR system. A semi-automatic approach is used that effectively and efficiently determines the number of convolutional layers in the network, the number of kernels and the size of the kernels. The experimental results show that the suggested model outperforms several existing recognition approaches that use the same data set.

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Accurate FMCW Frequency Synthesis Using Six-port Interferometry

Accurate FMCW Frequency Synthesis Using Six-port Interferome...

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IEEE Topical conference on Wireless sensors and sensor Networks (WiSNet)

作者： Arab, Homa Akyel, Cevdet Tatu, Serioja Univ Quebec INRS EMT Ste Foy PQ Canada Ecole Polytech Montreal Montreal PQ Canada

ISBN: (纸本)9781538612866

This paper analyses a wideband six-port based direct millimetre-wave PSK modulator, used to generate an accurate wideband FMCW signal, instead of a less precise conventional voltage controlled oscillator. Variable frequency generation is based on rapid variation of input CW mm-wave signal phase in a specific time, as described in the paper. In this purpose, the clockwise or anti-clockwise rotation of the PSK symbols and the corresponding variable data-rate must be considered to obtain the positive and negative ramps of the FMCW slope. The same wideband circuit can have other differed applications, from a simple high data-rate modulator to a valuable module in emerging advanced driver assistance systems (76-81 GHz).

关键词： Phase Shift Modulator Radar Range Estimation Reflection Coefficient Measurement sensor Six-port 16-PSK VCO

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A near-infrared carbon dioxide sensor system using a compact folded optical alignment structure 8

A near-infrared carbon dioxide sensor system using a compact...

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conference on advanced sensor systems and applications VIII

作者： Liu, Zhiwei Zheng, Chuantao xie, Hongtao Ren, Qiang Chen, Chen Ye, Weilin Wang, Yiding Tittel, Frank K. Jilin Univ Coll Elect Sci & Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China Jilin Univ Coll Instrumentat & Elect Engn 938 Ximinzhu St Changchun 130021 Jilin Peoples R China Shantou Univ Coll Engn 243 Daxue Rd Shantou 515063 Peoples R China Jilin Prov Engn Res Ctr Infrared Gas Sensing Tech 2699 Qianjin St Changchun 130012 Jilin Peoples R China Rice Univ Dept Elect & Comp Engn 6100 Main St Houston TX 77005 USA

ISBN: (纸本)9781510622418

A compact optical alignment structure and a novel beam-tracing method were proposed for tunable laser absorption spectroscopy (TLAS) based gas measurements, in order to minimize sensor size and ease beam alignment procedure. A near-infrared carbon dioxide (CO2) sensor system was developed based on the alignment structure. A distributed feedback (DFB) laser centered at 6361.3 cm(-1) and a multi-pass gas cell (MPGC) with an effective optical path length of 29.8 m were employed. The sensor system was integrated as standalone equipment by customizing an aluminum baseplate for a stable field operation. A series of experiments were carried out to assess the performance of the sensor system. A limit of detection (LoD) of similar to 7.1 parts-per-million in volume (ppmv) at a 0.4 s averaging time was obtained, and the LoD was reduced to similar to 277 parts-per-billion in volume (ppbv) at an optimum averaging time of 153.6 s. Considering gas mixing times, the rise and fall time were measured to be similar to 290 s and similar to 200 s, respectively.

关键词： laser absorption spectroscopy infrared absorption natural gas hydrates carbon dioxide sensor

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A Cost-Efficient and Continuous Ethernet Cable Diagnosis Technique based on Undersampling

A Cost-Efficient and Continuous Ethernet Cable Diagnosis Tec...

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IEEE International conference on Intelligent Data Acquisition and advanced Computing systems

作者： Ahmed Yahia Kallel Sebastian Uziel Manuel Schappacher Axel Sikora Thomas Keutel Olfa Kanoun Chair for Measurements and Sensor Technology Chemnitz University of Technology IMMS Institute of Microelectronic and Mechatronic Systems GmbH ivESK University of Applied Sciences Offenburg

ISBN: (纸本)9781728140704

The monitoring of industrial environments ensures that highly automated processes run without interruption. However, even if the industrial machines themselves are monitored, the communication lines are currently not continuously monitored in todays installations. They are checked usually only during maintenance intervals or in case of error. In addition, the cables or connected machines usually have to be removed from the system for the duration of the test. To overcome these drawbacks, we have developed and implemented a cost-efficient and continuous signal monitoring of Ethernet-based industrial bus systems. Several methods have been developed to assess the quality of the cable. These methods can be classified to either passive or active. Active methods are not suitable if interruption of the communication is undesired. Passive methods, on the other hand, require oversampling, which calls for expensive hardware. In this paper, a novel passive method combined with undersampling targeting cost-efficient hardware is proposed.

关键词： MLT-3 Undersampling Fast ethernet Signal monitoring OPC UA Undersampling Fast Ethernet Telecommunication lines cable repair cycle interruption continuous signals factory environment Oversampling

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Mathematical Model Extraction and State Space Construction for Nylon Based Smart Force sensor

Mathematical Model Extraction and State Space Construction f...

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RSI/ISM International conference on Robotics and Mechatronics (ICROM)

作者： Saeed Rezaeian Ahmad Reza Alghooneh Aghil Yousefi-Koma Reyhaneh A. Hosseininejad Center of Advanced Systems and Technologies (CAST) School of Mechanical Engineering College of Engineering University of Tehran Tehran Iran

ISBN: (数字)9781728166049

ISBN: (纸本)9781728166056

Twisted and Coiled Actuator has become widespread in recent years. It has lots of merits in comparison to classical actuators, especially in biomechanical applications. However, the most significant challenge which limits the use of this actuator is the unknown behavior of it for actuating and also self-sensing application. In this paper, we will represent a model for Twisted and Coiled Actuator by means of theoretical concepts and experimental data. First, the preparation process will be explained, then the mathematical model for Voltage-Current and Current-Force will be driven via LS identification method. In the result section, the temperature of this actuator will be estimated using measured current and heat transfer equation. Then it will be validated by experiment which shows that this model can be exploited for future applications in which control of the temperature is necessary.

关键词： Actuators Force Mathematical model Temperature sensors Resistance Optical fiber devices

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x all-Russian conference with international participation "Fuel combustion: Theory, experiment, applications"

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Journal of Physics: conference Series 2019年第1期1261卷

x All-Russian conference with international participation 'Fuel combustion: theory, experiment, applications' This conference was firstly organized in the 70s of the xx century. In recent decades, the conference has been held regularly every three years and it is a unique scientific event in Russia that attracts a lot of attention of Russian and foreign scientists and specialists in the field of energy, chemistry and mechanics of reacting media. The present conference covers the following topics: • Theory and numerical modeling of combustion • Heat and mass transfer in combustion systems • Combustion kinetics, catalysts • Combustion in gas-liquid media • Combustion of solid fuel • Combustion in near-and supersonic flows, detonation • Thermoacoustic instability and vibrational combustion • Combustion processes control • Combustion diagnostic methods and instruments • advanced technologies of fuel combustion • Deep coal processing, including gasification • Combustion of unconventional fuels • Issues of creating engines of a new generation • Environmental problems of burning fuels • Fire spreads • Economic issues of fuel power engineering The Scientific Committee appreciates the enormous work of the editorial board and reviewers in the preparation of this volume. We would like to express our sincere thanks to all authors for their research contributions, and also to organizers of the conference for their valuable spadework.

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