1,721,087 research outputs found
A Novel Predictive Current Control of Induction Motor Using Resonant DC Link Inverter
No full textA predictive current control technique for an induction motor employing a resonant DC link inverter is proposed to overcome the disadvantage of the current regulated delta modulation (CRDM) which was employed to control the resonant DC link inverter. The discrete model of an induction motor and estimation of back EMF are investigated and a novel predictive current control technique is newly developed based on this discrete model and estimated back EMF. Using the proposed control technique, the minimized current ripple with reduced offset can be obtained. The usefulness of the proposed technique is verified through the computer simulation
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
A Study on Efficient In-stack Shuffling in Block of the Container Terminal
Full text linkIn-stack shuffling means to get new position on the top tier in same bay with a minimum movement from original position for picking up and putting on the chassis of the Internal tractor (hereafter it is called YT)or, to get new scheduling from 섞임(Mixing Level)ed container working queues for loading operation in same bay. If operating system could not find new position on the top tier for next work queue in advance, or driver did not re-shuffle the container according to work sequence in time before YT arriving under the RTGC, then YT have to wait to shuffle accordingly. It means the quay crane’s total productivity decrease. To reduce waiting time of YT under RTGC, operating system or RTGC operator do the shuffling in time but previous shuffling in sufficient hour by driver could not make maximized effect due to actual situation change at the very time to pick up. So system has to be designed minimum shuffling under workable and practicable conditions. In consequence in this paper I will find the feasible solution under constraints and this feasible solution will be verified by simulation제 1 장 서 론………………………………………………………6
1.1 연구의 배경 및 필요성…………………………………………6
1.2 관련 문헌 연구…………………………………………………7
1.3 논문의 구성………………………………………………………8
제 2 장 시스템 현황 분석…………………………………………10
2.1 장치장 내에서의 재 취급 컨테이너 발생 요인………………10
2.1.1 반출 작업 시 재 취급 대상 컨테이너 발생………………10
2.1.2 선적 작업 시 재 취급 대상 컨테이너 발생………………11
2.1.3 복합적 작업 시 재 취급 대상 컨테이너 발생……………12
2.2 베이 내 작업 시 재 취급 대상 컨테이너의 장치 위치 지정 계획…13
2.2.1 반출 작업 시 대상 컨테이너 장치 위치 지정 계획………13
2.2.2 선적 작업 시 대상 컨테이너 장치 위치 지정 계획………14
2.2.3 복합적 작업 시 대상 컨테이너 장치 위치 지정 계획……15
2.3 베이 내 컨테이너 재배열 계획………………………………15
2.3.1 전체 재배열 계획……………………………………………16
2.3.2 베이 내 컨테이너 상단의 지속적 재배열…………………16
2.4 기존 시스템과의 비교…………………………………………17
제 3 장 문제의 정의 및 해법 수립………………………………19
3.1 문제의 설정……………………………………………………19
3.2 전체 재배열 계획 시 기본 문제 정의…………………………19
3.3 전체 재배열 계획 시 발견적 해법……………………………20
3.3.1 수치 예제……………………………………………………23
3.4 상단의 지속적 재배열 계획 시 기본 문제 정의……………26
3.5 상단의 지속적 재배열 계획 시 발견적 해법………………27
3.5.1 수치 예제……………………………………………………29
제 4 장 해법 및 결과분석…………………………………………34
4.1 전체 재배열 계획 시 발견적 해법의결과 및 분석…………34
4.1.1 모의실험환경…………………………………………………35
4.1.2 모의실험시스템………………………………………………35
4.1.3 모의실험결과…………………………………………………36
4.2 상단 재배열 계획 시 발견적 해법의결과 및 분석…………36
4.3 H사의 시스템에 적용시 ………………………………………37
제 5 장 결론 및 향후 연구방향……………………………………39
참고 문헌……………………………………………………………4
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Induction motor speed control using fast and slow modes
No full text학위논문(석사) - 한국과학기술원 : 전기 및 전자공학과, 1990.2, [ [iii], 63 p. ]한국과학기술원 : 전기 및 전자공학과
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