检索结果-内蒙古大学图书馆

IEEE/PES Transmission and Distribution Conference and Exposition: Latin America

作者： Fermín Rafael Cabezas Soldevilla Franklin Alfredo Cabezas Huerta Faculty of Mechanical Engineering - PhD Program in Energetics National University of Engineering Lima Peru

ISBN: (纸本)9781538658451

The identification of the values with good accuracy of physical parameters of transmission systems is very important because using very different values from the real ones seriously distorts the evaluation of the planning, design, operation, maintenance and commercialization of the transmission systems. The present work describes the identification of physical parameters of a real transmission system using a mathematical model with variable values of the physical parameters. The identification is done by comparing the real operation of the system with the simulated operation of the model, varying iteratively the physical parameters values of the mathematical model. To this purpose two different techniques were applied, a classical and a modern meta-heuristic technique to 47 high voltage transmission lines of the Peruvian electrical system. The real operation is obtained from the database of the measurements of the operating variables of the transmission system. The correct values of the physical parameters will be those that correspond to the simulated operation identified. This paper is organized as follows: Section II describes the philosophy of the parameter estimation problem, here is included the symbology, the model of the transmission system, the formulation of the problem and its solution. In section III, the results of the identified parameters are presented and discussed. Finally, in section IV the conclusions are presented.

关键词： Estimation Mathematical model Transmission line measurements Power transmission lines Parameter estimation Loss measurement Pollution measurement

来源：评论

学校读者我要写书评

暂无评论

A review of automatic solar tracking systems 7

A review of automatic solar tracking systems

引用

7th International Conference on Applications and Design in mechanical engineering, ICADME 2021

作者： Mohamad, A. Mhamdi, H. Amin, N.A.M. Izham, M. Aziz, N.A. Chionh, S.Y. Mechanical Engineering Program Faculty of Mechanical Engineering Technology Universiti Malaysia Perlis Perlis Malaysia Laboratory of Electronic Systems Information Processing Mechanics and Energetics Faculty of Sciences University Ibn Tofail Kenitra Morocco Institute of Engineering Mathematics Faculty of Applied Sciences and Humanities Universiti Malaysia Perlis Perlis Malaysia

Solar tracking systems which can track the Sun movement can increase the power generation rate by maximizing the surface area of the solar panels that are exposed to the sunlight. By utilizing a solar tracker, the number of solar panels needed to generate the same amount of electrical energy will be significantly lower. In general, solar tracking systems are classified as single-axis solar tracking systems and dual-axis solar tracking systems. Several researchers had conducted both simulation and experimental work to compare and evaluate the performance of solar tracking systems against static solar panels systems, as well as between different solar tracking system mechanisms. General agreements among the researchers are that the performance of solar tracking systems is always exceeding that of static solar panels. Some researchers also conducted studies on how the weather conditions affect the performance of solar panels, and they concluded that the systems with tracking mechanisms are more resilient toward a variation of weather conditions. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Meteorology

来源：评论

学校读者我要写书评

暂无评论

Prosthetic hand signals

引用

Significance 2018年第4期15卷 30-35页

作者： Mike Wininger Reva Johnson PhD has faculty appointments at the University of Hartford (Prosthetics Program) and Yale University (Department of Biostatistics) and is a statistician of clinical trials with the Department of Veterans Affairs. PhD is a professor in the Department of Mechanical Engineering and Bioengineering at Valparaiso University.

How Bayesian inference can decode movement intentions and control the next generation of powered prostheses. By Mike Wininger and Reva Johnson

关键词：

来源：评论

学校读者我要写书评

暂无评论

Comparative Analysis of AD8232 and BioAmp EXG Pill Analog Front-End Devices in ECG Signal Processing

Comparative Analysis of AD8232 and BioAmp EXG Pill Analog Fr...

引用

IEEE Conference on Systems, Process & Control (ICSPC)

作者： Tanakrit Mamee Panason Manorost Chakkapong Chamroon Kittiya Thunsiri Department of Mechanical Engineering PhD Program in Mechanical Engineering Under the CMU Presidential Scholarship Chiang Mai University Chiang Mai Thailand Faculty of bioscience engineering KU Leuven University Leuven Belgium Biomedical Engineering Institute Chiang Mai University Chiang Mai Thailand Department of Mechanical Engineering Chiang Mai University Chiang Mai Thailand Faculty of Engineering Chiang Mai University Chiang Mai Thailand

The development of compact portable ECG monitoring devices often entails the pursuit of downsizing measurement systems. This objective frequently involves additional efforts, such as custom PCB fabrication for analog front-end systems and exploration of alternative electrode types and configurations. In this study, we investigate the feasibility of using the BioAmp EXG Pill, a miniature commercial analog front-end board, in comparison to the well-established AD8232. Our analysis focuses on comparing ECG signals from five adult subjects, examining both frequency components using the welch estimation method and ECG parameters extracted from time-domain signals. The results reveal that both devices provided similar outcomes in time-domain measurements, with a slightly lower standard deviation observed in the AD8232. In terms of spectral density, both devices proficiently captured low-frequency components within the 0–3 Hz range. However, in higher-frequency domains, the AD8232 demonstrated superior capability in capturing finer frequency details.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Heterojunction and co-catalyst engineering of bismuth vanadate by nickel molybdenum oxide and carbon quantum dot decorations for photoelectrochemical water splitting

引用

International Journal of Hydrogen Energy 2024年 51卷 1099-1108页

作者： Kuo, Tsung-Rong Chiou, Yu-Tai Huang, Hsiao-Wen Kongvarhodom, Chutima Saukani, Muhammad Yougbaré, Sibidou Chen, Hung-Ming Lin, Lu-Yin Graduate Institute of Nanomedicine and Medical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei Taiwan Department of Chemical Engineering King Mongkut's University of Technology Thonburi 126 Pracha-u-thit Toong-kru Bangkok10140 Thailand Department of Mechanical Engineering Faculty of Engineering Universitas Islam Kalimantan MAB Jl. Adhyaksa No. 2 Banjarmasin70124 Indonesia /Nanoro 03 B.P 7192 Ouagadougou03 Burkina Faso Gingen technology Co. LTD. Rm. 7 10F. No.189 Sec. 2 Keelung Rd. Xinyi Dist. Taipei11054 Taiwan

Improving the charge diffusion length and water oxidation kinetics of bismuth vanadate (BiVO4) is essential to achieve better photoelectrochemical catalytic ability for water oxidation. Establishing heterojunctions and incorporating co-catalysts with BiVO4 create facile charge transfer paths and generate more water oxidation reactions. In this work, nickel molybdenum oxide (NM) and carbon quantum dot (CQD) are firstly deposited on BiVO4 by hydrothermal and soaking processes to design an efficient co-catalyst/photocatalyst system for water oxidation. The depositing amount of CQD is optimized to balance contributions of CQD and NM as the hole sink and the light-to-electron generator, respectively. The highest photocurrent densities of 2.2 and 3.9 mA/cm2 are achieved for BiVO4/NM/CQD in the electrolyte without and with hole scavenger, respectively. The BiVO4 electrode only shows a photocurrent density of 1.2 mA/cm2 in the electrolyte without hole scavenger. The best photoelectrochemical catalytic ability of BiVO4/NM/CQD is approached by the reduced charge-transfer resistance and charge recombination as well as the enhancement on carrier densities. The excellent long-term stability with the photocurrent retention of 90% under illumination for 24 h is also obtained for BiVO4/NM/CQD. This study opens a blueprint on designing efficient catalysts for water oxidation by incorporating heterojunction and co-catalyst materials simultaneously. © 2023 Hydrogen Energy Publications LLC

关键词： Heterojunctions

来源：评论

学校读者我要写书评

暂无评论

Efficiently catalyzing photo-oxidation of water by surface engineering of bismuth vanadate with nickel molybdenum oxide coverages

引用

International Journal of Hydrogen Energy 2024年 51卷 613-622页

作者： Kuo, Tsung-Rong Huang, Hsiao-Wen Kongvarhodom, Chutima Saukani, Muhammad Yougbaré, Sibidou Chen, Hung-Ming Lin, Lu-Yin International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Graduate Institute of Nanomedicine and Medical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei Taiwan Department of Chemical Engineering King Mongkut's University of Technology Thonburi 126 Pracha-u-thit Toong-kru Bangkok10140 Thailand Department of Mechanical Engineering Faculty of Engineering Universitas Islam Kalimantan MAB Jl. Adhyaksa No. 2 Banjarmasin70124 Indonesia /Nanoro 03 B.P 7192 Ouagadougou 03 Burkina Faso Gingen Technology Co. LTD. Rm. 7 10F. No.189 Sec. 2 Keelung Rd. Xinyi Dist. Taipei11054 Taiwan

Bismuth vanadate with suitable band edges is one of the efficient photocatalysts for water oxidation. Establishing heterojunction can improve electron diffusion lengths and photocatalytic ability of BiVO4. In this work, nickel molybdenum oxide (Ni–Mo–O) and BiVO4 heterojunction is established by the hydrothermal process with different nickel to molybdenum precursor ratios. The Ni–Mo–O/BiVO4 electrode is applied as photoanodes for water oxidation. The growth mechanism of Ni–Mo–O on BiVO4 surface is proposed. The Ni–Mo–O deposition amount is optimized regarding to light absorbance and charger transportation. The largest photocurrent density of 1.72 mA/cm2 at 1.23 VRHE is obtained for the optimal NiMoO4/BiVO4 electrode (NM12) in the electrolyte without hole scavenger, while the pure BiVO4 electrode only shows a photocurrent density of 0.90 mA/cm2. The NM12 electrode even presented an impressive photocurrent density of 5.39 mA/cm2 at 1.23 VRHE in the electrolyte with the hole scavenger, owing to the abundant active sites and higher light absorbance as well as the favorable synergistic effects from its suitable Ni to Mo ratio. The NM12 electrode also shows excellent long-term stability with the photocurrent retention of 83% after illumination for 6500 s. This work opens a blueprint for establishing a novel heterojunction with the adjustable metal ratio and coverage on BiVO4. © 2023 Hydrogen Energy Publications LLC

关键词： Heterojunctions

来源：评论

学校读者我要写书评

暂无评论

Enhanced light-driven photoelectrochemical catalysis of water splitting by TiO2 nanotubes grown on acid-etched titanium foils

引用

International Journal of Hydrogen Energy 2024年第PartA期51卷 1483-1493页

作者： Hsiao, Yu-Cheng Lai, Jhih-Hong Fan, Yu-Min Chen, Hung-Ming Yougbaré, Sibidou Saukani, Muhammad Chen, Chih-Yu Wu, Yung-Fu Lin, Lu-Yin International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Stanford Byers Center for Biodesign Stanford University CA94305-5428 United States Graduate Institute of Biomedical Optomechatronics College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei Taiwan Department of Chemical Engineering Ming Chi University of Technology New Taipei City24301 Taiwan Gingen Technology Co. LTD. Rm. 7 10F. No.189 Sec. 2 Keelung Rd. Xinyi Dist. Taipei11054 Taiwan /Nanoro 03 B.P 7192 Ouagadougou03 Burkina Faso Department of Mechanical Engineering Faculty of Engineering Universitas Islam Kalimantan MAB Jl. Adhyaksa No. 2 Banjarmasin70124 Indonesia Department of Orthopedics Shuang Ho Hospital Taipei Medical University New Taipei City23561 Taiwan International Ph.D. Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Cell Physiology and Molecular Image Research Center Wan Fang Hospital Taipei Medical University Taipei11696 Taiwan

Titanium dioxide with suitable band edges is one of promising photocatalysts for water splitting. Nanotubes with one-dimensional structure can induce efficient charge transfers and hollow centers can provide large surface area for surface reactions. Modifying Ti foils for anodization can enhance light utilization of TiO2 nanotube photoelectrodes. In this work, it is firstly to fabricate TiO2 nanotube photoelectrodes on acid-etched Ti foils by anodization (MNT) for photoelectrochemical catalyzing water splitting. Different acid-etching durations are applied on Ti foils to induce various rugged surfaces. The resulting photoelectrodes present largely enhanced light utilization than that fabricated by the pristine Ti foil. The anodization duration is also optimized to find suitable lengths of MNT. The smallest overpotential of 524.7 mV at 10 mA/cm2 and Tafel slope of 167 mV/dec are obtained for the optimal MNT photoelectrode. The TiO2 nanotubes grown on the pristine Ti foil shows the overpotential of 679.3 mV at 10 mA/cm2 and Tafel slope of 285 mV/dec. This result opens a blueprint for raising the photocatalytic ability by simply modifying the surface property of the conductive substrate. Other modifications may be applicable to enhance the roughness of Ti foils for growing more efficient MNT array as photocatalysis of water splitting. © 2023 Hydrogen Energy Publications LLC

关键词： Titanium dioxide

来源：评论

学校读者我要写书评

暂无评论

Predicting biocrude oil yields from hydrothermal liquefaction of an energy grass: Machine learning approach and experimental validation

引用

AIP Conference Proceedings 2024年第1期3236卷

作者： Tossapon Katongtung Nakorn Tippayawong Graduate PhD Degree Program in Energy Engineering Faculty of Engineering Chiang Mai University Chiang Mai 50200 Thailand Department of Mechanical Engineering Faculty of Engineering Chiang Mai University Chiang Mai 50200 Thailand

In recent years, our world has been grappling with the challenges of global warming, prompting a search for alternative energy sources that can provide clean and sustainable power without adversely impacting the environment. Biomass has emerged as a viable option due to its potential as a renewable and environmentally friendly energy source. Among various processes available, hydrothermal liquefaction (HTL) has gained significant attention for its capability of converting wet biomass into biocrude oil in a relatively short timeframe. Previous studies have explored integration of machine learning with HTL to forecast the yields of biocrude oil. This work aims to develop a machine learning model specifically tailored to predicting the biocrude oil yields from the HTL process. Furthermore, experiments were done using Napier 4190 (Giant Juncao Grass) as a biomass source to verify the accuracy of this machine learning model. The findings revealed that the machine learning model achieved an R2 value of approximately 0.8. Model predictions and experimental results show a discrepancy of approximately 6-14%.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A review of automatic solar tracking systems

引用

Journal of Physics: Conference Series 2021年第1期2051卷

作者： A Mohamad H Mhamdi NAM Amin M Izham NA Aziz SY Chionh Mechanical Engineering Program Faculty of Mechanical Engineering Technology Universiti Malaysia Perlis Perlis Malaysia Laboratory of Electronic Systems Information Processing Mechanics and Energetics Faculty of Sciences University Ibn Tofail Kenitra Morocco Institute of Engineering Mathematics Faculty of Applied Sciences and Humanities Universiti Malaysia Perlis Perlis Malaysia

关键词：

来源：评论

学校读者我要写书评

暂无评论

Facile synthesis of cobalt, nickel and manganese-based metal organic framework derived layered double hydroxides on Ni foam as effective binder-free electrodes of energy storage devices

引用

Journal of Energy Storage 2024年 78卷

作者： Kuo, Tsung-Rong Huang, Jing-Mei You, Xiang-Yu Subbiramaniyan, Kubendhiran Kongvarhodom, Chutima Saukani, Muhammad Yougbaré, Sibidou Chen, Hung-Ming Lin, Lu-Yin International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Graduate Institute of Nanomedicine and Medical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei Taiwan Department of Chemical Engineering King Mongkut's University of Technology Thonburi 126 Pracha-u-thit Toong-kru Bangkok10140 Thailand Department of Mechanical Engineering Faculty of Engineering Universitas Islam Kalimantan MAB Jl. Adhyaksa No. 2 Banjarmasin70124 Indonesia /Nanoro 03 B.P 7192 Ouagadougou03 Burkina Faso Gingen technology Co. LTD. Rm. 7 10F. No.189 Sec. 2 Keelung Rd. Xinyi Dist. Taipei11054 Taiwan

Metal organic framework (MOF) derivatives have attracted intensive attention as the active material of energy storage devices. Layered double hydroxide (LDH) with large surface area, high redox capability and good cycling stability is regard as one of efficient active materials. Developing MOF-derived LDH with multiple metals can possibly achieve excellent surface properties, high electrical conductivity and abundant redox reactions. However, synthesizing MOF-derived LDH is time-consuming and requires high temperature environments. In this work, a simple and time-effective precipitation and etching process is proposed to synthesize MOF-derived LDH on nickel foam (NF) as binder-free electrodes of energy storage devices. The cobalt, nickel and manganese are utilized to design MOF-derived LDH with different metal species and numbers. The trimetallic MOF-derived LDH based on Co, Ni and Mn presents a high specific capacitance (CF) of 1113.7 F/g at 20 mV/s, due to abundant electroactive sites and multiple redox states for carrying out large numbers of redox reactions. The energy storage device composed of the trimetallic MOF-derived LDH and carbon on NF as electrodes presents the maximum energy density of 61.5 Wh/kg at the power density of 750 W/kg, and the CF retention of 92.5% and Coulombic efficiency of 95% after 10,000 charge/discharge cycles. © 2023 Elsevier Ltd

关键词： Electrodes

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：