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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

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Hierarchical Linear-Nonlinear DC Microgrid Control

IAENG International Journal of Computer Science

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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

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Smart inverter arc fault protection for photovoltaic power systems 17

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

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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

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

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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)

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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...

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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

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Human systems integration and advanced technology in engineering department workload and manpower reduction

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NAVAL ENGINEERS JOURNAL 2003年第1期115卷 57-65页

作者： Lively, KA Seman, AJ Kirkpatrick, M KENNETH A. LIVELY graduated from the University of Colorado with a BS in applied mathematics and an MS in mathematics in 1976 and from the Massachusetts Institute of Technology with an MS in electrical engineering and the degree ocean engineer in naval architecture and marine engineering in 1984. He retired from the U.S. Navy in 1989 after 23 years of service. Assignments included electrical officer on the USS Constellation (CV 64) project engineer for the DDG 51 machinery control system (NAVSEA) and DDG 51 Technical Director (NAVSEA). He was vice president of the PDI Division of Bird-Johnson Company from July 1989 to November 1998 where he managed various gas turbine and machinery controls related development projects. He joined Anteon Corporation's Systems Engineering Group as senior controls engineer in December 1998 where he provided technical support to the integrated power systems program (NAVSEA PMS 510) and managed the Office of Naval Research Afloat Laboratory. DR. MARK KIRKPATRICK is currently an independent consultant in human factors and work-load/manning analysis and modeling. He holds a Ph.D. degree in experimental psychology from The Ohio State University and has 34 years of experience in applied human factors. From 1982 through 2000 Dr. Kirkpatrick served as the senior vice president of Carlow International. Prior to joining Carlow in 1982 Dr. Kirkpatrick served as a member of the technical staff at North American Rockwell's Missiles Division and as a project director and vice president for Essex Corporation. His areas of expertise include workload simulation task analysis operator-in-the-loop simulation human performance experimentation statistical analysis and human factors T&E. He has directed and/or participated in human factors projects for the U.S. Navy U.S. Army NASA Department of Transportation the U.S. Nuclear Regulatory Commission and private industry. ANTHONY J. SEMAN III is the technical manager for the reduced ship's crew by virtual presence (RSVP) advanced technology d

Aboard current ships, such as the DDG 51, engineering control and damage control activities are manpower intensive. It is anticipated that, for future combatants, the workload demand arising from operation of systems under conditions of normal steaming and during casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current DDG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central Control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as DD 21 and the integrated engineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workload demand reduction and, consequently, manning reduction that can be achieved due to application of several advanced technology concepts. Advanced system concept studies in relation to workload demand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current DDG 51 activities. Development of the reduced ship's crew by virtual presence system that will provide automated monitoring and display to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.

关键词： Naval warfare

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A fair and efficient bandwidth allocation algorithm for high-speed local area networks

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART I-COMMUNICATIONS 1996年第5期79卷 66-75页

作者： Saito, T Aida, H Kim, B Aoki, T Faculty of Engineering the University of Tokyo Tokyo Japan 113 Byung-suk Kim:graduated in 1991 from the Department of Electrical Engineering Seoul University Korea and received his Master's degree in 1994 from the University of Tokyo where he is currently in the doctoral program. He is engaged in research on access control in ultrahigh-speed LAN.

With the advent of broadband integrated services digital network (B-ISDN), there is the increasing need for high-speed multimedia systems also in the area of local area networks (LANs). It is obvious that the conventional systems such as CSMA/CD or token ring cannot cope with those requirements. At present, several new access control methods are proposed for slotted ring (or bus) LANs suited to transmission rates above 155 Mbps. This paper reviews the characteristics of those methods in a systematic way and proposes a new access control method called distributed reset algorithm (DRA). DRA can provide high throughput while maintaining the almost strict access fairness by using a new control called ''access bit control'' in addition to the already known window control.

关键词： high-speed LAN slotted ring ATMR metaring method FECCA

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Measurement of refractive index distribution of optical waveguides by the propagation mode near-field method employing an improved inverse analysis

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS 1996年第9期79卷 21-29页

作者： Yabu, T Sawa, S Geshiro, M Faculty of Engineering Osaka Prefecture University Sakai Japan 593 Graduated from the Department of Electronic Engineering Doshisha University in 1989 and received his M.S. degree from Kyoto University in 1991. He withdrew from the doctoral program in 1993 and became a Research Associate at Osaka Prefecture University. He has been engaged in research on optical waveguides. Graduated from the Department of Electrical Engineering Osaka Prefecture in 1962 and joined Mitsubishi Electric remaining there until he left in 1964. He received his M.S. He received his M.S. and Dr. of Eng. degrees from Osaka University in 1967 and 1970 respectively. In 1970 he became an Associate Professor at Ehime University in the Department of Electronic Engineering where he was promoted to Professor in 1976. In 1991 he became Professor of Osaka Prefecture University in the Department of Electrical Engineering and in 1993 Professor in the Department of Electrical and Electronic Systems Engineering. He has been engaged in research on optical waveguides optical integrated circuits optical fibers and planar antennas. He is a member of IEEE Laser Society and the Institute of Electrical Engineers of Japan. Graduated in 1973 from the Department of Communication Engineering Osaka University and received his M.S. and Dr. of Eng. degrees in 1975 and 1978 respectively. In 1979 he became a Research Associate at Ehime University where he was promoted to an Associate Professor in 1984. In 1986–87 he was on leave at the University of Texas at Austin. In 1994 he became an Associate Professor at Osaka Prefecture University. He has been engaged in research on optics and millimeter wave and microwave waveguides. He is a member of IEEE.

A method to estimate the refractive index profile of an optical waveguide exists in which the optical intensity distribution of the only one propagation mode is used. Since this method requires only a microscope and a television camera, setup is extremely simple and inexpensive, thereby making the method practical. The differential processing method and the inverse analysis method have been proposed as methods to use the optical intensity distribution of only one propagation mode. The mechanisms of these methods that use the optical intensity distribution are presented in detail here. As a consequence, a new method that overcomes the difficulties in the previous methods, to be called Improved Inverse Analysis Method with Fewer Parameters, is proposed. Further, by using this proposed method, the index profiles of the step-index type optical fiber and the buried optical waveguide can be estimated in order for validity of the method to be studied.

关键词： optical waveguide refractive index profile image measurement

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Degradation mechanism of contact resistance during window formation

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS 1996年第1期79卷 93-100页

作者： Sekine, M Kakuhara, Y Kikkawa, T Nonmember NEC ULSI Device Development Laboratory Sagamihara Japan 229 Graduated in 1985 from Department of Metal Materials Osaka University where he received his Master's degree in 1988. He joined NEC in 1988. Graduated in 1984 from the Department of Electrical Engineering Aoyama Gakuin University and she received her Master's degree from Shinshu University in 1986. She joined NEC in 1986. She is a member of the Applied Physics Society. Graduated in 1974 from the Department of Electrical Engineering Shizuoka University where he received his Master's degree in 1976. He received his Ph.D. degree from Tokai University. He joined NEC in 1976. He is engaged in research and development of semiconductor LSI device and process. He was a Visiting Researcher at MIT from 1983 to 1984. He is currently a director of multilayer wire formation program ULSI Device Development Institute. He is a member of IEEE ICS and Applied Physics Society.

This paper describes a contact degradation mechanism during window formation followed by selective tungsten chemical vapor deposition (W-CVD). Contact resistances by using selective W-CVD were increased as the overetching rate increased. Surface analysis made it clear that the Si surface at the bottom of contact was damaged and oxygen atoms from dielectrics were introduced during window etching. These damage and oxygen atoms break Si-Si bonds and make Si-O bonds after additional ion implantation. The Si-O bonds degrade the valence-band density of states of the Si surface. Such a damaged surface will not react with WF6. This inactivation is the reason for contact degradation. Controlling the Si surface state by using the chemical dry etching (CDE) technique solves this problem.

关键词： selective W-CVD contact chemical dry etch

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Soliton system evaluations using fibers with dispersion and loss fluctuations

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS 1996年第4期79卷 77-84页

作者： Ishiba, K Komatsu, T Takahara, M Faculty of Engineering Yamanashi University Kofu Japan 400 Graduated in 1994 from the Department of Electronic and Information Engineering where he is currently in the Master's program. He has been engaged in research on optical fiber soliton transmission. Received his B.S. and M.S. degrees in 1993 and 1995 respectively from the Department of Electronic and Information Engineering Yamanashi University. He joined NTT in April 1995. He has been engaged in research on simulation of the optical fiber soliton transmission and on the transmission system with flexibility in transmission speed. Graduated from the Department of Electrical Engineering Yamanashi University in 1965 and received his M.S. degree in 1967. He received his Ph.D. degree later. In 1967 he became a Research Associate of the Department of Electronic Engineering Yamanashi University. In 1991 he became a Professor of Electronic and Information Engineering. He has been engaged in research on special function theory nonlinear circuits optical communication systems and LAN systems. In 1984 he received a Book Award from I.E.I.C.E. In 1990–91 he was on leave at Southampton University. He is a member of IEEE.

In the development of practical multimedia systems, greater capacity is desired in a long-distance large-capacity transmission system. A number of studies have been undertaken to develop a long-distance large-capacity system. Several long-distance transmission experiments for high-density transmission by wavelength demultiplexing method (WDM) have been reported recently. However, more of the experimental examples have reported on soliton transmission than on WDM systems. Hence, the former is considered more advanced. It is necessary to prepare a fiber of a length of approximately 10,000 km for ultralong-distance transmission experiment. Since this is difficult to obtain, repetitive experiments are often the case. However, such an experiment does not disclose the effects of dispersion and loss fluctuation in the fiber. In this paper, the effect of fluctuation in dispersion and loss in the fiber is studied by simulation so that the resilience of the soliton to the variations of the fiber characteristics is evaluated.

关键词： optical soliton dispersion fluctuation loss fluctuation Gordon-Haus jitter

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