检索结果-内蒙古大学图书馆

2023 International Conference on Computer Science, Information Technology and engineering, ICCoSITE 2023

作者： Sidharta, Sidharta Heryadi, Yaya Lukas, Lukas Suparta, Wayan Arifin, Yulyani Bina Nusantara University BINUS Graduated Program Computer Science Computer Science Department Jakarta11480 Indonesia Jakarta12930 Indonesia Institut Teknologi Nasional Yogyakarta Faculty of Industrial Technology Department of Electrical Engineering Yogyakarta55281 Indonesia

ISBN: (纸本)9798350320954

Currently, the performance of the police in Indonesia is often in the spotlight of the public with cases that occur, both on a national and regional scale, including personal experiences who also feel disappointed with the performance of the police. The cases, such as the rape of three children by a biological father in East Luwu, and the barrage of other cases that have occurred, in their handling have left the public disappointed, giving rise to the hashtag percumlaporpolisi on social media, especially on twitter. This hashtag became trending and was widely responded to by the public. Using free hashtag keywords, tweet data is collected using Twitter's API for sentiment analysis. The datasets obtained from the crawling results is the latest data with a total of 100 datasets. This study applies the naïve bayes algorithm using textblob which aims to determine the value of polarity and subjectivity. From the results of the analysis carried out, the words that appear most often are useless police, police chief, and policeman. While the results of the sentiment analysis that has been carried out are 40 percent positive sentiment, 40 percent are neutral sentiment and 10 percent are negative sentiment from the hashtags used. From these results, according to the keywords used, the percentage of negative sentiment should be greater than positive and neutral sentiment. It is necessary to conduct a more in-depth study related to the model used in the next research. © 2023 IEEE.

关键词： Sentiment analysis

来源：评论

学校读者我要写书评

暂无评论

Impact point of probing rockets by telemetry and slant range 5

Impact point of probing rockets by telemetry and slant range

引用

5th International Symposium on Instrumentation Systems, Circuits and Transducers, INSCIT 2021

作者： Cantanhede, Nilton Rodrigues Santana, Ewaldo Eder Carvalho Da Silva Junior, Paulo Fernandes De Jesus Barros, Jonas Freire, Raimundo Carlos Silverio State University of Maranhao Graduating Program in Engineering Computation and Systems São Luís Brazil Graduated in Mathematics The Federal University of Maranhão São Luís Brazil Federal University of Campina Grande Graduate Program in Electrical Engineering Campina Grande Brazil

ISBN: (纸本)9781728197265

In this work, is developing a method for obtaining the point of impact of a rocket by telemetry data and a Slant Range device. The trajectory data was obtained from a real flight path by merging the angular components of a telemetry antenna (azimuth and elevation) and the radial distance information provided by the Slant Range device. Position components were analyzed with the Telemetry antenna in automatic mode (in tracking), comparing with the tracking performance performed by the location radar. The result is obtained by the composition of the coordinates of the Telemetry-Slant Range set. A significant reduction in the search area can be used as an alternative form of use, providing additional location information for payload recovery around the actual point of impact. © 2021 IEEE.

关键词： Rockets

来源：评论

学校读者我要写书评

暂无评论

Sentiment Analysis of Hashtag Activism on Social Media Twitter

Sentiment Analysis of Hashtag Activism on Social Media Twitt...

引用

Computer Science, Information Technology and engineering (ICCoSITE), International Conference on

作者： Sidharta Sidharta Yaya Heryadi Lukas Lukas Wayan Suparta Yulyani Arifin Computer Science Department BINUS Graduated Program Computer Science Bina Nusantara University Jakarta Indonesia Cognitive Engineering Research Group (CERG) Universitas Katolik Indonesia Atma Jaya Jakarta Indonesia Department of Electrical Engineering Faculty of Industrial Technology Institut Teknologi Nasional Yogyakarta Yogyakarta Indonesia

Currently, the performance of the police in Indonesia is often in the spotlight of the public with cases that occur, both on a national and regional scale, including personal experiences who also feel disappointed with the performance of the police. The cases, such as the rape of three children by a biological father in East Luwu, and the barrage of other cases that have occurred, in their handling have left the public disappointed, giving rise to the hashtag percumlaporpolisi on social media, especially on twitter. This hashtag became trending and was widely responded to by the public. Using free hashtag keywords, tweet data is collected using Twitter’s API for sentiment analysis. The datasets obtained from the crawling results is the latest data with a total of 100 datasets. This study applies the naïve bayes algorithm using textblob which aims to determine the value of polarity and subjectivity. From the results of the analysis carried out, the words that appear most often are useless police, police chief, and policeman. While the results of the sentiment analysis that has been carried out are 40 percent positive sentiment, 40 percent are neutral sentiment and 10 percent are negative sentiment from the hashtags used. From these results, according to the keywords used, the percentage of negative sentiment should be greater than positive and neutral sentiment. It is necessary to conduct a more in-depth study related to the model used in the next research.

关键词： Computer science Sentiment analysis Pediatrics Law enforcement Social networking (online) Blogs Biology

来源：评论

学校读者我要写书评

暂无评论

Hierarchical Linear-Nonlinear DC Microgrid Control

IAENG International Journal of Computer Science

引用

IAENG International Journal of Computer Science 2021年第3期48卷 1-7页

作者： Velez-Ramirez, Juan S. Giraldo, Eduardo Graduated student The master on Electrical Engineering program Universidad Tecnologica de Pereira Pereira Colombia Professor at the Department of Electrical Engineering Universidad Tecnologica de Pereira Research Group in Automatic Control Pereira Colombia

In this work, a method for hierarchical hybrid linear-nonlinear microgrid control is proposed based on nonlinear primary control and linear secondary control. The nonlinear controller is an Extended Feedback Linearization method, and the linear controller is a PID structure. The proposed method is evaluated in several scenarios to validate its performance to disturbances and island operation mode. To this end, three units of distributed generation are included: Photo-Voltaic Energy Sources, Energy Storage Systems, and Small-Hydro-Power Sources. The results are simulated over a DC microgrid that contains three different distributed generation units with disturbances and island operation mode. As a result, the proposed approach's robustness is validated for several cases, where the advantage of a hierarchical linear-nonlinear structure is shown. © 2021. All Rights Reserved.

关键词： Controllers

来源：评论

学校读者我要写书评

暂无评论

A Geographic Information System Application to Estimate the Weather-Dependent Power System Losses

A Geographic Information System Application to Estimate the ...

引用

IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)

作者： Karen A. Villarreal Chaires Emilio Barocio Dunstano Del Puerto Flores Felix Rafael Segundo Sevilla Petr Korba Graduated program in electrical engineering Universidad de Guadalajara Guadalajara Jalisco México Electric Power Systems and Smart Grid Lab Zurich University of Applied Sciences ZHAW Winterthur Switzerland

ISBN: (纸本)9781665434287

The accuracy of weather-dependent power flow analysis for large interconnected systems can be significantly improved by including more electrical devices exposed to weather variables such as ambient temperature, wind speed and solar irradiance. The innovative part of the proposed approach is the combination of factors such as a voltage regulating transformer model, freely available weather data to feed the weather-dependent power flow algorithm, and a geographic visualization tool to display the results. To demonstrate the effectiveness of the proposed approach, the IEEE 118-bus system is used to analyze and compare the results of the weather-dependent power flow model versus a conventional power flow. In this case, it is used in the stationary analysis, the power flow temperature algorithms are performed in spatial visualization schemes. The results show that weather conditions directly affect the power system performance

关键词： Temperature sensors Temperature distribution Reactive power Wind speed Data visualization Transformers Data models

来源：评论

学校读者我要写书评

暂无评论

Study on the applicability of microstrip circular antennas in partial discharges detection in power transformers 7

Study on the applicability of microstrip circular antennas i...

引用

7th Brazilian electrical Systems Symposium, SBSE 2018

作者： Xavier, G.V.R. Da Costa, E.G. Serres, A.J.R. De Oliveira, A.C. Nobrega, L.A.M.M. Cruz, J.N. Post-Graduated Program in Electrical Engineering-PPgEE-COPELE Federal University of Campina Grande Campina Grande Brazil Federal University of Campina Grande Campina Grande Brazil

ISBN: (纸本)9781538633632

The degradation of transformer's internal insulation system can be monitored by partial discharges activity. Among the supervising systems, the use of ultra high frequency (UHF) antennas attached on transformer's tank is highlighted. The UHF microstrip antennas can be used on this task and provide some interesting features, such as, low cost, ease of manufacturing and installation on several facilities. However, the microstrip antennas have a narrow band. The main objective of this work is to analyze the applicability of a microstrip circular antenna on detection of partial discharges in power transformers. For this purpose, a truncated ground plane technique for bandwidth optimization was applied. The manufactured antenna reached a high sensitivity for the partial discharges detection, showing mean gainvalue higher than 2 dB on the frequency range analyzed, as well return losses lower than-10 dB. © 2018 IEEE.

关键词： Partial discharges

来源：评论

学校读者我要写书评

暂无评论

Smart inverter arc fault protection for photovoltaic power systems 17

Smart inverter arc fault protection for photovoltaic power s...

引用

17th IEEE International Conference on Environment and electrical engineering and 2017 1st IEEE Industrial and Commercial Power Systems Europe, EEEIC / I and CPS Europe 2017

作者： Vidales, B. Weber, S. Schweitzer, R. Torres, D. Madrigal, M. Vandoeuvre les Nancy54506 France Graduated Program of Research in Electrical Engineering Technologic of Mexico - Technological Institute of Morelia Morelia Mexico

ISBN: (纸本)9781538639160

In this work is presented a study of the influence that basic components present in photovoltaic installations, have in conventional Arc Fault (AF) protection systems, one of this components is the DC/AC Converter and MPPT tracking system which both work under the command of a PWM switching control strategy. With a deeper analysis of this type of components is possible to develop an approach that improve the actual efficiency of arc fault prevention systems. The possibility of preventing arc faults by detecting a voltage drop and modifying converters control is study and disputed its in this work. This is possible due to the fact that the DC/AC converters has a direct impact in the harmonic content of current and voltage signals conventionally employed in Arc Fault Detection Devices (AFDD), a comparative analysis of simulation results between both real and ideal schematic validate the statement above. © 2017 IEEE.

关键词： Solar panels

来源：评论

学校读者我要写书评

暂无评论

Wavefront Sensor for spatial scan using the Hartmann-Shack method

Wavefront Sensor for spatial scan using the Hartmann-Shack m...

引用

International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT)

作者： Carlos Felipe G. Souza Henrique A. Cordeiro Davies W. de Lima Monteiro Telson Emmanuel O. Crespo Úrsula V. Abecassis Luciana P. Salles Graduated Program in Electrical Engineering — Federal University of Minas Gerais - UFMG Belo Horizonte MG Brasil Departament of Electronics and Telecommunications Federal Institute of Amazonas — IFAM Manaus AM Brazil

This paper presents a simplified instrument to measure the profile of a refractive object contactlessly based on the Hartmann-Shack (H-S) method. The sensing device has been designed with a simple CMOS Position-Sensitive Detector (PSD) of the quad-cell (QC) type, comprising four Active-Pixel Sensor (APS) pixels. A collimated laser beam traverses the object and the resulting wavefront is shaped by its profile. We demonstrate the reconstruction of this wavefront, and therefore the profile of the object, by sequentially sampling the wavefront through a moving single aperture coupled to a converging lens. Notwithstanding, we propose a sequence of steps for instrument calibration, among them the focalization step, using a feature of the QC not yet explored. A target lens was used as a test structure and its sagitta was measured, presenting an average error of 4% with respect to the datasheet value.

关键词： Lenses Laser beams Measurement by laser beam Transistors Quantum cascade lasers Apertures Optical sensors

来源：评论

学校读者我要写书评

暂无评论

Getting Undergraduates Ready for China’s Belt and Road Initiative (BRI) Through an Overseas Experiential Learning Project

引用

China and the World 2021年第3期4卷

作者： Andrew Min Han Chin Thomas Menkhoff Hans-Dieter Evers Hoong Hui Daniel Gn Kevin Koh Chester Wey Lee Patrick H. M. Loh Linda Low Sebastian Tan Teng Seng Teo Natalie Yap Lee Kong Chian School of Business Singapore Management University (SMU) 81 Victoria Street Singapore 188065 Singapore Andrew Chin Min Han graduated from Tsinghua University in Beijing China with a Tsinghua–MIT Sloan International Master of Business Administration degree under the Singapore Government’s Asian Business Fellowship (ABF) scholarship program. He is the Program Director of Singapore Management University (SMU) Executive Certificate in China Business and of the SMU Internationalisation Series. He teaches as an Adjunct Faculty of Strategy and Organisation at the SMU Lee Kong Chian School of Business since January 2017. He teaches effectively in English and Chinese. With over 23 years of experience in education and publishing industry in Asia Andrew Chin’s multi-sector career has enabled him to experience the full spectrum of the education industry in his roles as the Singapore EDB Officer handling the World-Class University portfolio and the Specialist Information and Publishing Industry portfolio Chief Representative and Country Manager (China) at Thomson Learning (Fortune 500 company) and Co-founder and CEO for an early childhood education business. Andrew was a Business Development Director (Universities) at Sodexo Group (Fortune 500 company) for the Asia-Pacific region. After working 10 years in Beijing China Andrew returned to Singapore in 2012 to work closely with the top leadership at Singapore Management University on the SMU China & East Asia Initiatives. Thomas Menkhoff is the Professor of Organisational Behaviour & Human Resources (Education) at the Lee Kong Chian School of Business Singapore Management University (SMU). Two of his recent publications include: (i) Menkhoff Thomas Ning Kan Siew Evers Hans-Dieter and Chay Yue Wah eds. Living in Smart Cities: Innovation and Sustainability (New Jersey: World Scientific Publishing 2018) and (ii) Chay Yue Wah Menkhoff Thomas and Low Linda eds. China’s Belt and Road Initiative — Understanding the Dynamics of a Global Transfor

In this paper, we explain how an experiential learning course and study tour to Gansu Province (People’s Republic of China) enabled undergraduates at the Singapore Management University (SMU) to acquire 21st-century competencies and higher-order thinking skills by analyzing and evaluating specific aspects of China’s Belt and Road Initiative (BRI) and China–Singapore (Chongqing) Connectivity Initiative — New International Land–Sea Trade Corridor (CCI-ILSTC) with emphasis on developing viable Go-To-Market (GTM) strategies aimed at selling Gansu produce in four Southeast Asian markets. We share how the course was designed to support the attainment of key learning goals and discuss how we turned pedagogical aspirations into concrete learning outcomes. We introduce key aspects of the so-called “SMU-XO” project that the students conducted in partnership with an industry partner, Pacific International Lines (PIL), and discuss how the project work helped learners to gain global competency by (i) examining critical issues related to BRI such as multi-modal infrastructure connectivity, (ii) appreciating the local perspectives of project stakeholders in Lanzhou and Shanghai and (iii) successfully interacting with people from different cultures, namely China, Indonesia, Vietnam, Malaysia and Thailand.

关键词： Experiential learning Singapore China Belt and Road Initiative (BRI)

来源：评论

学校读者我要写书评

暂无评论

A New Fuzzy Logic Application To Search the Optimal Step Size For NLMS Beamforming

A New Fuzzy Logic Application To Search the Optimal Step Siz...

引用

International Conference on Telecommunications and Signal Processing

作者： Walter Orozco-Tupacyupanqui Hector Perez-Meana Mariko Nakano-Miyatake Graduated PhD program in Communication and Electronic Engineering National Polytechnic Institute Graduate studies and Research section of The Mechanical and Electrical Engineering School National Polytechnic Institute

ISBN: (纸本)9781479984992

This paper proposes a new application based on fuzzy logic to search the optimal Step Size of the Normalized Least Mean Square (NLMS) algorithm for beamforming systems. The searching of the step size depends on the fuzzy inference results of an estimation of the final value of the cost function (J_E) instead of using its instantaneous value. The update of the step-size is performed outside of the adaptive algorithm and given it feedback by the fuzzy inference system;therefore the step-size is still fixed for the NLMS algorithm but variable for the complete searching scheme. Simulation experimental results show that a useful approximation of the optimal step-size can be obtained for different conditions of signal-to-noise plus interference ratios (SINR) and the minimization of the mean square error for the adaptive beamforming algorithm is also achieved.

关键词： Adaptive linear array Communication systems Fuzzy inference systems Normalized least mean square (NLMS) algorithm Smart antennas

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：