检索结果-内蒙古大学图书馆

74th International Astronautical Congress, IAC 2023

作者： Hsieh, Jordan H. Huang, Yi-Lung Huang, Ping-Han Wang, Wei-Cheng Li, Yueh-Heng Department of Aeronautics and Astronautics National Cheng Kung University Tainan70101 Taiwan International Doctoral Degree Program on Energy Engineering National Cheng Kung University Tainan70101 Taiwan

This research delves into the effects of cylindrical anode dimensions on the steady-state discharge of open-ended heaterless hollow cathodes. The study assessed anode diameters of 38 mm, 74 mm, and 102 mm. Challenges arose when utilizing the 102 mm diameter anode in diode mode, with a suspected divergent electric field stemming from the anode's size and closeness hindering consistent discharge between the cathode and anode. The cathode was set to operate in triode mode with the keeper adjusted to a discharge current of 1.2 A to navigate this impediment, ensuring the axial electric field's adequacy. In contrast, tests with 74 mm and 38 mm anodes were conducted in diode mode, with the keepers kept unpowered. Analysis of the I-V curves underscored a typical negative resistance in the cathode discharge, a phenomenon attributable to the diminishing emitter sheath voltage with elevating electron energy flux and emitter surface temperatures. A pronounced inverse correlation between the steady-state discharge current and gas flow rate was also discerned, connected to rising emitter temperatures and enhanced plasma drift resistance in the keeper orifice. Notably, anode diameter emerged as a determinant of current leakage, with the 74 mm anode presenting a reduced discharge voltage compared to the 38 mm due to augmented current leakage. Conversely, the 102 mm anode demanded a higher voltage, a requirement linked to its attenuated axial electric field, compelling a rise in voltage for a sufficient current draw to the anode power supply. These discoveries furnish understanding for refining open-ended heaterless hollow cathode designs and pave the way for subsequent inquiries into cathode plumes. Copyright © 2023 by the International Astronautical Federation (IAF). All rights reserved.

关键词： Anode Cathode Diameter Geometry Heaterless

来源：评论

学校读者我要写书评

暂无评论

Implementation of Multi-process Automatic Loading and Unloading Production System

Implementation of Multi-process Automatic Loading and Unload...

引用

2023 International Conference on Consumer Electronics - Taiwan, ICCE-Taiwan 2023

作者： Tung, Li-Chiuan Chen, Shu-Hung Ye, Yu-Cheng Liu, Guan-Zhi Chen, Lin-Yin Tu, Yu-Rou Lai, Yen-Wen Lee, Jeng-Dao National Formosa University Department of Automation Engineering Yunlin Taiwan Ming Chuan University Department of Electronic Engineering Taoyuan City Taiwan National Yunlin University of Science and Technology Doctoral Program in Industrial Engineering and Management Yunlin Taiwan

ISBN: (纸本)9798350324174

This research develops an intelligent automatic production loading and unloading solution for a multi-process part. According to the posture required for each processing operation of each part, a novel gripper and carrier that can implement multi-position clamping are designed. The Beckhoff controller is adopted as the host controller in the control system to integrate the robotic arm (including the vision system), the automated guided vehicle (AGV), and the computer numerical control (CNC) machine. The main topic of this research is to meet the requirements of automatic loading and unloading in the processing of the entire production line. It will significantly reduce the workforce consumption of the processing production line and avoid human error, thereby improving processing reproducibility and product production stability. © 2023 IEEE.

关键词： Controllers

来源：评论

学校读者我要写书评

暂无评论

Performance Evaluation of Coverage Prediction in 4G Networks Using Machine Learning Classification Algorithm 10

Performance Evaluation of Coverage Prediction in 4G Networks...

引用

10th International Conference on Wireless and Telematics, ICWT 2024

作者： Yuliana, Hajiar Iskandar Hendrawan Ridwan, Azwar Mudzakkir Charisma, Atik Somantri, Nivika Tiffany Universitas Jenderal Achmad Yani Faculty of Engineering Department of Electrical Engineering Indonesia Institut Teknologi Bandung Doctoral Program of School of Elecrtical Engineering and Informatics Indonesia Bandung Indonesia UIN Sunan Gunung Djati Bandung Department of Electrical Engineering Indonesia

ISBN: (纸本)9798350377057

Network coverage prediction is an important aspect of 4G network planning and optimization. In this study, we conducted a comprehensive analysis of the performance of various machine learning algorithms in predicting 4G network coverage. The data collected includes information on location, signal intensity, topography, and other important variables. Data pre-processing is performed to clean, normalize, and select relevant features. Next, we compared the performance of several machine learning algorithms, including Logistic Regression, KNN, Naïve Bayes, Decision Tree, SVM, XGBoost, AdaBoost, and Bayesian Network Classifier. The model training process is performed using subsets of training, validation, and testing data, with evaluation performed using various evaluation metrics such as accuracy, precision, recall, F1-score, RMSE, MAE, and R-squared. The experimental results show that Random Forest stands out with excellent performance, while Naïve Bayes tends to produce lower performance. The conclusion of this study provides valuable insights into the potential applications of machine learning algorithms in predicting 4G network coverage with accuracy and reliability. © 2024 IEEE.

关键词： Adversarial machine learning

来源：评论

学校读者我要写书评

暂无评论

Quantitative EEG Analysis Based on PSD and eLORETA-Source Localization Approach in Spatial Auditory Process 8

Quantitative EEG Analysis Based on PSD and eLORETA-Source Lo...

引用

8th International Conference on Instrumentation, Control, and Automation, ICA 2023

作者： Masitoh, Masitoh Suprijanto, Suprijanto Joko Sarwono, R.S. Institut Teknologi Bandung Doctoral Program of Engineering Physics Bandung Indonesia Institut Teknologi Bandung Instrumentation and Control Research Group Bandung Indonesia Institut Teknologi Bandung Engineering Physics Research Group Bandung Indonesia

ISBN: (纸本)9798350301274

The advancement of spatial audio technology has been driven by the human capacity for spatial auditory, enabling immersive auditory experiences that replicate real-life sound environments. Understanding how the brain encodes spatial auditory processes has emerged as a growing area of research. Electroencephalography (EEG), a non-invasive modality with high temporal resolution, offers an ideal means to study brain responses to moving sound stimuli. This study aims to compare quantitative EEG methods derived from direct EEG recordings, focusing on EEG temporal features such as Power Spectral Density (PSD), as well as EEG source localization using eLORETA. Two types of audio stimuli, stereo audio and spatial audio, delivered through headsets attached directly to both ears, were investigated. When exposed to the spatial audio stimulus, there was a notable increase in the mean PSD within the Theta, Alpha, and Beta frequency bands in the auditory cortex (channel T3, T4, T5, and T6). The most significant increase was observed in the Beta frequency band of 145.601 μV2/Hz in T4, indicating heightened focus experienced by the subjects compared to the stereo audio stimulus. Furthermore, EEG source localization using eLORETA revealed distinct activation in the frontal area during the second experiment involving the spatial audio stimulus. Specifically, there was a significant increase (p>0.05) in current density within the frontal regions of the brain, including Brodmann Area (BA) 6 and 9, which are associated with selective attention and spatial orientation. These findings highlight the practicality of the employed methods and their potential to shed light on brain activity during spatial auditory processes. © 2023 IEEE.

关键词： Electroencephalography

来源：评论

学校读者我要写书评

暂无评论

High embedding reversible data hiding scheme for JPEG

High embedding reversible data hiding scheme for JPEG

引用

6th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIHMSP 2010

作者： Kuo, Wen-Chung Kuo, Shao-Hung Wuu, Lih-Chyau Depart. of Computer Science and Information Engineering National Formusa University Yunlin 632 Taiwan Graduate School of Engineering Science Technology Doctoral Program National YunLin University of Science and Technology Yunlin 640 Taiwan

ISBN: (纸本)9780769542225

Both Data hiding and data compression are very important technologies in the field of image processing. It seems that there is no relationship between data hiding and data compression because most of the data hiding mechanisms focus on information security and the data compression mechanisms emphasize the compression ratio. In fact, they are closely related. Until now, there are many literatures to discuss the secret data how to be embedded into the media image. Unfortunately, the stego-image's size will be increased when the media image is hidden a lot of secret data. In order to overcome this disadvantage, a reversible data hiding scheme based on EMD data hiding and JPEG compression technology will be proposed in this paper. According to the experimental results, we can prove that our proposed scheme still keeps high embedding capacity, security and good compression ratio. © 2010 IEEE.

关键词： Steganography

来源：评论

学校读者我要写书评

暂无评论

The Effect of Quality of Service Towards the Implementation of Trajectory Hard Handover on Mobile Cellular

The Effect of Quality of Service Towards the Implementation ...

引用

2022 International Conference on Electrical engineering and Informatics, ICELTICs 2022

作者： Murhaban Syahrial Arif, Teuku Yuliar Arnia, Fitri Universitas Syiah Kuala Doctoral Program School of Engineering Banda Aceh Indonesia Universitas Teuku Umar Departement Information Technology Engineering Aceh Barat Indonesia Universitas Syiah Kuala Departement Information Technology Engineering Banda Aceh Indonesia

ISBN: (数字)9781665487665

ISBN: (纸本)9781665487665

Wireless network communication, particularly when user equipment conducts its mobility and maintains its connection in order to stay alert when automatically switching service among base stations, needs a handover method that guarantees the communication is stable with no disturbance from the distance of the base station and the speed of the user equipment. The convenience of communication during handover depends on the quality of service that provides the level of different services in arranging and giving traffic priority in the network. This research is designed using a one-way trajectory with eight base stations and speed variations of 45 km/hour, 60km/hour, and a distance of the base station of 7 km. The effects of hard handover with the performance of RRSI and RSRP against the parameter performance of service quality with the service of voice over internet protocol when entering the critical signal area and must conduct handover with the constant speed that analyzed based on telecommunication reference and internet protocol harmonization over networks. Simulation using optimized network engineering tools modeler educational. The result of a test that was carried out using the hard handover for voice-over-internet application, obtained a better averagejitter result for a speed of 45 km/hour compared to a speed of 65 km/hour. The average delay for 45 km/h is 11.5 ms and for 60 km/h is 11 ms. While the throughput for speeds of 45 km/h and 60 km/h with a value of 190-198 Kbps with a low index that throughput does no effect on the application used. © 2022 IEEE.

关键词： Base stations

来源：评论

学校读者我要写书评

暂无评论

Analysis of Temiki (Melastoma Candidum) Extract Compounds as Corrosion Inhibitors Using GC–MS 4th

Analysis of Temiki (Melastoma Candidum) Extract Compounds as...

引用

4th International Conference on Experimental and Computational Mechanics in engineering, ICECME 2022

作者： Supardi, Joli Rizal, Samsul Ali, Nurdin Fonna, Syarizal Ikramullah, Ikramullah Arifin, A.K. Doctoral Program School of Engineering Post Graduate Program Syiah Kuala University Banda Aceh23111 Indonesia Department of Mechanical Engineering Teuku Umar University Meulaboh23615 Indonesia Department of Mechanical and Industrial Engineering Syiah Kuala University Banda Aceh23111 Indonesia Department of Mechanical and Materials Engineering Universiti Kebangsaan Malaysia Selangor DE Bangi43600 Malaysia

ISBN: (纸本)9789819974948

Temiki (Melastoma Candidum) is one of the unutilized wild plants observed to be turning pests on plantations. It has only been used for medicine and not for engineering purposes. Therefore, this study aims to identify and analyze Temiki’s chemical compounds, which are useful as corrosion inhibitors. The plant was washed, dried, then blended until it became a fine powder, and was further extracted by employing the maceration method with ethanol as solvent. The extracted compounds were also analyzed using Gas Chromatography-Mass Spectrophotometry (GC–MS) and the results obtained include, 2-Furancarboxaldehyde (CAS) Furfural, 1,2,3-Propanetriol (CAS) Glycerol, Acetic acid,1-(2-methyltetrazole-5-yl) etheny, 4H-Pyran-4one,2,3-dihydro-3,5-dihydroxy, 5-Hydroxymethylfurfural, cis-dimethylmorpholine, 3-penten-1-ol,2,2,4-trimethyl-(CAS)2,2,4, 2-AMINO-9-(3,4-DIHYDROXY-5-HYDORO, D-Allose, beta-D-Glucopyranoside, methyl, Hexadecanoic acid, methyl ester, 9,12,15-Octadecatrienoic acid, methyl ester. In conclusion, these chemical compounds were useful as corrosion inhibitors. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Corrosion

来源：评论

学校读者我要写书评

暂无评论

Place attachment in supporting the preservation of religious historical built environment 5

Place attachment in supporting the preservation of religious...

引用

5th International Seminar on Sustainable Urban Development, ISoSUD 2020

作者： Wahyudie, P. Antariksa, A. Wulandari, L.D. Santosa, H. Doctoral Program of Civil Engineering Department Brawijaya University Malang Indonesia Department of Interior Design Institut Teknologi Sepuluh Nopember Surabaya Indonesia Department of Architecture Brawijaya University Malang Indonesia

The place attachment theory is a scientific part of the relationship between human behavior and built environment study. The built environment study explains the existence of a building and its landscape. The place attachment theory has been used in studying the relationship between human behavior with a religious and historic environment during its development. However, nowadays, this research rarely conducted and often carried out partially. As a consequence, the result analysis is only partially. This study proposed a holistically place attachment to provide a broader discourse in examining the relationship between human behavior and the built environment holistically. Moreover, place attachment theory will be used to preserve the historical religious built environment. In addition, the literature review from the previous studies and discussion methods are essential to support the research. The result shows that there is an opportunity to conduct a study of place attachment theory in supporting the preservation of the historical religious built environment. Thus, the holistic result can be obtained using the place attachment theory, which is the combination of place identity, place dependence, place affect, and place social bonding. © Published under licence by IOP Publishing Ltd.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Automation System Architecture of pH Neutralization Process in Batik Wastewater Treatment Plant 4

Automation System Architecture of pH Neutralization Process ...

引用

4th engineering Physics International Conference 2023, EPIC 2023

作者： Diyah, Nazuwatussya Ekawati, E. Pradipta, J. Yulia, E. Master Program of Instrumentation and Control Faculty of Industrial Technology Institut Teknologi Bandung Indonesia Engineering Physics Research Group Faculty of Industrial Technology Institut Teknologi Bandung Indonesia Doctoral Program of Engineering Physics Faculty of Industrial Technology Institut Teknologi Bandung Indonesia Center for Instrumentation Technology and Automation Institut Teknologi Bandung Indonesia

Batik production in home industries needs support wastewater treatment in a limited space. Therefore, a modular-type, lab-scale wastewater treatment plant (WWTP) with a capacity of 87.75 liters and a dimension of 1.5 m × 0.75 m × 1 m has been constructed. The WWTP combines three significant processes: equalization, neutralization, and adsorption. This study focuses on the monitoring systems for the pH neutralization process. The system uses four microprocessors in a Master/Slave architecture and the I2C protocols for data communication between processors. The measuring instruments include pH, temperature, turbidity, and flow rate sensors. The actuators consist of submersible and peristaltic pumps. The operating range of pH, temperature, turbidity, and flow rate sensors are 0-14, 25-81.44℃, 0-3000 NTU, and 6.49-20.84 ml/s respectively. The pumps work in Pulse Width Modulation (PWM) mode with an operating range of 125-225 PWM. All sensors and actuators operate linearly within the operating range with a correlation coefficient of 0.97-1. © 2023 Institute of Physics Publishing. All rights reserved.

关键词： Turbidity

来源：评论

学校读者我要写书评

暂无评论

Stepwise Pyrolysis by LBCR Downstream to Enhance of Gasoline Fraction of Liquid Fuel from MMSW

引用

Energy engineering 2022年第3期119卷 1169-1178页

作者： Indra Mamad Gandidi Edy Suryadi Efri Mardawati Dwi Rustam Kendarto Nugroho Agung Pambudi Department of Mechanical Engineering Education Universitas Pendidikan IndonesiaBandung40154Indonesia Postgraduate Student of Doctoral Program Faculty Agroindustrial TechnologyUniversitas PadjadjaranJatinangor45363Indonesia Faculty Agroindustrial Technology Universitas PadjadjaranJatinangor45363Indonesia Department of Mechanical Engineering Education Universitas Sebelas MaretSurakarta57126Indonesia

Pyrolysis is one of the thermal cracking methods to convert hydrocarbon to liquid *** quantity and quality of the process are dependent on several condition including temperature,reaction time,catalyst,and the type of ***,a gasoline fraction was maximum product to be considered in the pyrolisis ***,this study aims to increase the gasoline fraction in liquid fuel using stepwise pyrolysis with a long bed catalytic reactor downstream(LBCR).The LBCR downstream was equipped with the top and bottom outlet and the fed source was mixed municipal solid waste(MMSW).The activated natural dolomite at 500℃ was used to allow the repetition of the secondary ***,the reactor temperature was setup at around 200℃-300℃ and the pyrolizer was 400℃.To analyze the gasoline fraction and physical properties of liquid fuel,Gas Chromatography-Mass Spectroscopy(GC-MS)and ASTM standard were *** experimental results showed there was a significant increase in the gasoline fraction of liquid fuels compared to using direct catalytic cracking and absence of *** using a LBCR at 250℃,the liquid fuel obtained at top outlet(TO)and bottom outlet(BO)have 84.08 and 56.94 percent peak area of gasoline fraction(C5-C12),*** average value(TO and BO)of the fraction at 250℃ by LBCR was 70.51 percent peak area and it was increased by about 93.6%and 51.14%compared to without catalyst and direct catalytic,***,pyrolytic liquid oils were found to have kinematic viscosity of 2.979 and 0.789 cSt,density of 0.781 and 0.782 g/cm^(3),and flash point<−5℃ for BO-250 and TO-250 liquid fuel,*** results showed BO liquid fuel was comparable to diesel conventional fuel while TO liquid fuel was comparable to ***,the presence of LBCR made a major contribution to generate multi secondary cracking and to produce more gasoline fraction from mixed MMSW feedstock,as well as to increase the physical properties of l

关键词： Liquid fuel gasoline fraction LBC MMSW stepwise pyrolysis natural dolomite catalys

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：