检索结果-内蒙古大学图书馆

Design and implementation of the quality of mineral water test equipment using fuzzy logic method based on Internet of Things

引用

IOP Conference Series: Materials Science and engineering 2021年第4期1098卷

作者： E Kurniawan S Sumaryo F Budiman A Happy B S Aprillia Post Graduate Program of Chemistry Department Faculty of Mathematics and Natural Sciences Padjadjaran University Jalan Raya Bandung-Sumedang Jatinangor Sumedang Indonesia School of Electrical Engineering Telkom University Bandung Indonesia

Water is a chemical compound that is very important for living things on this earth. The function of mineral water for human life cannot be replaced by other compounds. To ensure that it can be used for needs, quality monitoring must be carried out continuously. This study aims at designing mineral water quality test equipment using the fuzzy logic algorithm method that is equipped with a pH sensor, TDS sensor, temperature sensor, LDR sensor, LCD, Wi-Fi module. The simulation results show that an average value of pH sensor of 8.5 - 12, TDS sensor of 300 - 350 ppm, sensor temperature of 22-25oC, and the resistance of the LDR of 110-170 Ohm sensor for daytime while the evenings of 920 - 970 Ohm. The several types of water tested was 5 areas around Bandung and Telkom University Dormitories. The accuracy of this tool reaches of 80%, it can be seen from the calibration results.

关键词：

来源：评论

学校读者我要写书评

暂无评论

On the Performance of Industrial Wireless Sensor Networks: Channel Hopping vs. Channel Adaptive Protocols 1

引用

6th International Conference on Sensor Networks, SENSORNETS 2017 and 7th International Conference on Sensor Networks, SENSORNETS 2018

作者： Gomes, Ruan D. Benavente-Peces, Cesar Alencar, Marcelo S. Queiroz, Diego V. Fonseca, Iguatemi E. Post-Graduate Program in Electrical Engineering Federal University of Campina Grande Campina Grande Brazil Informatics Coordination Federal Institute of Paraiba Guarabira Brazil Signal Theory and Communications Department Universidad Politecnica de Madrid Madrid Spain Informatics Center Federal University of Paraiba Joao Pessoa Brazil

ISBN: (数字)9783030301101

ISBN: (纸本)9783030301095

The standard IEEE 802.15.4e shows several improvements which makes it outperforming the predecessor IEEE 802.15.4 standard. A remarkable improvement is the use of multiple channels and the capability to choose the most convenient depending on the network links state. Hence, different techniques can be provisioned to dynamically select the most appropriate channel for establishing the link through an adaptive mechanism. During the contention-free periods, the Time-Slotted Channel Hopping (TSCH) mode is based on channel hopping while the Deterministic and Synchronous Multi-channel Extension (DSME) mode uses either channel hopping or channel adaptation. In scenarios where channel diversity techniques are used for channel adaptation nodes links are established using the same channel as long as the channel quality (SNR) is high enough. In consequence to guarantee link best performance, its quality must be measured periodically to decide whether continue in the same channel of switch to a better performance one. Our investigation focuses on the analysis of the performance of three different approaches which pretend to take advantage of the multichannel capabilities of the new standard, based on the DSME protocol: CH-DSME which is based on a simple channel hopping mechanism, CA-DSME which employs channel adaptation, and a novel hybrid approach (H-DSME) which combines channel hopping and channel adaptation. This investigation shows that, in an industrial environment, the H-DSME outperforms both CH-DSME and CA-DSME approaches. In this work, the Castalia simulator was used to perform the simulations, using a reliable simulation model, which captures the characteristics of the wireless channel in industrial environments in long range basis. The analysis demonstrates that channel adaptation is better than channel hopping for unicast packets transmission, when links quality are continuously measured. Nevertheless, the coordinator transmit packets in broadcast mode, it is demonst

关键词： Wireless sensor networks

来源：评论

学校读者我要写书评

暂无评论

Design and implementation of synchronous rectification for an arc-welding machine

Design and implementation of synchronous rectification for a...

引用

Conference Record of the IEEE Industry Applications Society Annual Meeting (IAS)

作者： Flavio Marcos Coelho Michel Braz Cardoso Electrical Engineering Post-Graduate Program Federal University of Minas Gerais Belo Horizonte Brazil Federal University of Minas Gerais Belo Horizonte Brazil

In Arc-Welding Machines (AWM), the power-to-weight ration is an important project parameter. This paper brings a proposition to use synchronous rectification to lower rectification stage's power losses on semiconductors, increasing total efficiency. A commercial product was studied, tested and characterized and a synchronous rectifier was then designed to replace the passive diode rectifier. A model of the machine was created and verified by comparison with measured behaviour and then used to simulate the synchronous rectifier application. Simulation results showed a promising reduction in power losses, which could be used in reducing the machine's size or increasing its power rating. In both cases, an improvement of power-to-weight ratio is verified. Ultimately, bench tests and welding tests were made to establish a comparison point between the machine with passive rectifier and the machine with synchronous rectifier.

关键词： Welding Windings MOSFET Schottky diodes Topology Switches

来源：评论

学校读者我要写书评

暂无评论

Universal Active Power Filter Based on Three Three-Leg Converters and a Single DC-link

Universal Active Power Filter Based on Three Three-Leg Conve...

引用

IEEE Energy Conversion Congress and Exposition, ECCE

作者： Phelipe L. S. Rodrigues Cursino B. Jacobina Andre E. L. Costa Ítalo A. Cavalcanti de Oliveira Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Federal University of Campina Grande (UFCG) Paraíba Brazil Department of Electrical Engineering Federal University of Campina Grande (UFCG) Paraíba Brazil

This paper presents a universal active power filter (UAPF) for harmonic and sag/swell voltage compensation based on the nine-leg converter and a single dc-link. The proposed UAPF combines three three-phase converters operating as series-shunt-series filters. An SV-PWM technique was used to improve the voltage levels generated by the converters by obtaining multilevel voltages. The connection made in the topology proposed in this paper allows an improvement in the harmonic distortions as well as the semiconductors losses. The complete control system is developed, simulation and experimental results are shown for validation purposes.

关键词： Topology Harmonic analysis Impedance Harmonic distortion Load modeling Active filters Power system harmonics

来源：评论

学校读者我要写书评

暂无评论

Cascaded Multilevel Rectifiers with Reduced Number of Controlled Switches for Open-End Winding PMSM

Cascaded Multilevel Rectifiers with Reduced Number of Contro...

引用

IEEE Energy Conversion Congress and Exposition

作者： Amanda P. Monteiro Cursino B. Jacobina Filipe A. C. Bahia Reuben P. R. Sousa Post-Graduate Program in Electrical Engineering - PPgEE/COPELE Campina Grande Paraíba Brazil Department of Electrical Engineering (DEE) Federal University of Campina Grande (UFCG) Campina Grande Paraíba Brazil

This paper proposes three configurations of unidirectional open-end winding (OEW) cascaded multilevel rectifiers with reduced number of controlled switches. They are based on Vienna rectifiers and are composed of a series combination of two three-phase converters and three H-bridges employing floating capacitors (per phase). These configurations make the ac-dc conversion power, supplied by a permanent magnet synchronous machine (PMSM), which is connected to the rectifier by an OEW configuration. Compared to the conventional, proposed systems synthesize the same or higher number of voltage levels using fewer number of controlled switches and is still possible to obtain lower converter current harmonic distortion. Furthermore, they can operate with lower switch blocking voltage ratio. These features make them attractive options to the industry due to their low costs, low control complexity and size, besides they are more reliable and less prone to failure. Therefore, proposed configurations have a better cost-benefit than conventional one. The system model, PWM technique, capacitor voltage balancing and control strategy are given. Simulation and experimental results are provided in order to validate their feasibility.

关键词： Capacitors Voltage control Switches Reliability Topology Bridge circuits

来源：评论

学校读者我要写书评

暂无评论

Correction to: Design framework for a seamless smart glove using a digital knitting system

引用

Fashion and Textiles 2021年第1期8卷 1-1页

作者： Song, Yewon Lee, Seulah Choi, Yuna Han, Sora Won, Hyuna Sung, Tae-Hyun Choi, Youngjin Bae, Jihyun PhD Candidate Department of Electrical Engineering Hanyang University Seoul South Korea Post Doctoral Researcher Department of Electrical and Electronic Engineering Hanyang University Ansan South Korea Graduate Student Department of Electrical and Electronic Engineering Hanyang University Ansan South Korea Graduate Student Human-Tech Convergence Program Department of Clothing & Textiles Hanyang University Seoul South Korea Professor Department of Electrical Engineering Hanyang University Seoul South Korea Professor Department of Electrical and Electronic Engineering Hanyang University Ansan South Korea Associate Professor Human-Tech Convergence Program Department of Clothing & Textiles Hanyang University Seoul South Korea

An amendment to this paper has been published and can be accessed via the original article.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Implementation of Augmented Reality in Pretend Play Therapy for Children with Autism Spectrum Disorder 3

Implementation of Augmented Reality in Pretend Play Therapy ...

引用

3rd International Conference on Computing and Applied Informatics 2018, ICCAI 2018

作者： Syahputra, M.F. Angkasih, A.P. Purnamawati, S. Andayani, U. Abdullah, D. Sriadhi, S. Iskandar, A. Rosida, T.M. Fitriany, J. Sari, I.N. Utama, M.D. Nanuru, R.F. Department of Information Technology Faculty of Computer Science and Information Technology Universitas Sumatera Utara Medan Indonesia Department of Informatics Universitas Malikussaleh Aceh Utara Indonesia Department of Electrical Engineering Universitas Negeri Medan Indonesia Informatics Engineering STMIK AKBA Makassar Indonesia Graduate Program in Scientific Psychology Universitas Kristen Maranatha Indonesia Department of Pediatric Universitas Malikussaleh Aceh Utara Indonesia Departement of Social Science Education Program Post Graduate Program Universitas Kanjuruhan Malang Malang Indonesia Faculty of Social and Political Science Universitas Kristen Indonesia Maluku Indonesia Universitas Kristen Indonesia Maluku Ambon Indonesia

Autism Spectrum Disorder is a pervasive developmental disorder that will affect children in terms of interpersonal communication, social interaction, and imaginative levels in play. Many therapies to help the motor neuron performance is one of them Pretend Play. Pretend Play is a therapy that invites children in playing to demonstrate something else and tell how to use objects that are considered in the child's imagination. However, in the era of highly developed technology, many fields have used the Augmented Reality method as a visualization of various aspects. With this method researchers will present the therapeutic visualization of the block to 3D transportation tool that is useful for strengthening motor nerves and visual strength of the child. The system can run well during marker detection, marker movement, and 3D object display with the accuracy of precision angle and distance between virtual world with real world reach 100% with angle 0 at distance 31 cm and the maximum distance from the marker is 46 cm and the maximum angle is 30. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Augmented reality

来源：评论

学校读者我要写书评

暂无评论

Multilevel Single-Phase PWM Converters with Shared Legs and Cascaded Transformers

Multilevel Single-Phase PWM Converters with Shared Legs and ...

引用

IEEE Energy Conversion Congress and Exposition

作者： Joao Paulo R. A. Mello Cursino B. Jacobina Amanda P. Monteiro Post-Graduate Program in Electrical Engineering (PPgEE/COPELE) Federal University of Campina Grande (UFCG) Campina Grande Paraíba Brazil Department of Electrical Engineering (DEE) Federal University of Campina Grande (UFCG) Campina Grande Paraíba Brazil

In this work, a family of multilevel single-phase converters is proposed. This family is based on cascaded cells, each composed by K two level legs connected to the primary windings of K - 1 transformers, while their secondary windings are cascaded to generate a multilevel voltage. Two kinds of cells are considered: the shared leg (SL), in which one leg is connected to all transformers, and the multiple shared legs (MSL), which has various legs each shared between two transformers. The turns ratios of th transformers can be calculated in order to give each pole voltage a different voltage gain in the secondary side. This causes the legs and transformers to be asymmetrical, increasing the levels-per-switch generated. The generalized model, turns ratio calculation and PWM design are provided for proposed converters composed by M SL or MSL cells. By means of simulation and experimental results, two topologies within proposed family are analyzed, one composed by one SL cell, and the other by one MSL cell, both with four legs. They are compared to the conventional cascaded h-bridge (CHB) with two bridges and corresponding isolation transformers. Various cases of asymmetry are considered, and results are analyzed to show that the configurations within the proposed family can provide better performance than the CHB in terms of switching stress and harmonic distortion.

关键词： Legged locomotion Switches Windings Pulse width modulation Topology Guidelines Harmonic distortion

来源：评论

学校读者我要写书评

暂无评论

Transformerless Series Active Compensator operating with Floating Capacitors for DFIG based Wind Energy Conversion System

Transformerless Series Active Compensator operating with Flo...

引用

IEEE Energy Conversion Congress and Exposition, ECCE

作者： Ítalo A. Cavalcanti de Oliveira Cursino Brandão Jacobina Nady Rocha Emerson de Lacerda Soares Nayara Brandão de Freitas Post-Graduate Program in Electrical Engineering (PPgEE) Federal University of Campina Grande (UFCG) Paraíba Brazil Electrical Engineering Department (DEE) Federal University of Campina Grande (UFCG) Paraíba Brazil Electrical Engineering Department (DEE) Federal University of Paraíba (UFPB) Paraíba Brazil

In this paper a Wind Energy Conversion System based on Doubly Fed Induction Generator (DFIG) with series active compensator without additional transformer is proposed. The series compensator acts on the compensation of the grid voltages disturbance (harmonic distortion, voltage sag and voltage swell) in the DFIG stator voltages. The series active compensator is based on three H-bridge inverters operating with floating capacitors. The proposed control system regulates the floating capacitors voltages with no need for external sources. Simulation and experimental results are presented in order to evaluate the proposed system.

关键词： Voltage control Capacitors Power quality Stator windings Doubly fed induction generators Voltage fluctuations

来源：评论

学校读者我要写书评

暂无评论

Electronic nose in differentiating and ascertaining clinical status among patients with pulmonary nontuberculous mycobacteria: A prospective multicenter study

引用

The Journal of infection 2023年第3期87卷 255-258页

作者： Meng-Rui Lee Hung-Ling Huang Wei-Chang Huang Shang-Yu Wu Pang-Chun Liu Jui-Ching Wu Meng-Hsuan Cheng Chau-Chyun Sheu Kea-Tiong Tang Jann-Yuan Wang Chao-Chi Ho Jin-Yuan Shih Inn-Wen Chong Department of Internal Medicine National Taiwan University Hospital Taipei Taiwan. Department of Internal Medicine Kaohsiung Municipal Ta-Tung Hospital Kaohsiung Taiwan Division of Pulmonary and Critical Care Medicine Department of Internal Medicine Kaohsiung Medical University Hospital Kaohsiung Taiwan Department of Internal Medicine Kaohsiung Medical University Hospital Kaohsiung Taiwan Graduate Institute of Medicine College of Medicine Kaohsiung Medical University Kaohsiung Taiwan. Division of Chest Medicine Department of Internal Medicine Taichung Veterans General Hospital Taichung Taiwan Department of Post-Baccalaureate Medicine College of Medicine National Chung Hsing University Taichung Taiwan Mycobacteria Center of Excellence Department of Internal Medicine Taichung Veterans General Hospital Taichung Taiwan School of Medicine Chung Shan Medical University Taichung 402 Taiwan Ph.D. Program in Translational Medicine National Chung Hsing University Taichung 402 Taiwan Department of Medical Technology Jen-Teh Junior College of Medicine Nursing and Management Miaoli Taiwan. Department. of Electrical Engineering National Tsing Hua University Hsinchu Taiwan. Division of Pulmonary and Critical Care Medicine Department of Internal Medicine Kaohsiung Medical University Hospital Kaohsiung Taiwan Department of Internal Medicine Kaohsiung Medical University Hospital Kaohsiung Taiwan. Department. of Electrical Engineering National Tsing Hua University Hsinchu Taiwan. Electronic address: kttang@ee.nthu.edu.tw. Department of Internal Medicine National Taiwan University Hospital Taipei Taiwan. Electronic address: jywang@ntu.edu.tw. Graduate Institute of Medicine College of Medicine Kaohsiung Medical University Kaohsiung Taiwan Department of Respiratory Therapy Kaohsiung Medical University Hospital Kaohsiung Taiwan Department of Biological Science & Technology National Chiao Tung University Hsin-Chu Taiwan.

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：