1,720,971 research outputs found
Dynamic and Static Feedback Structure for Analyzing Network Efficiency
No full text雖然網路式資料包絡分析(Network DEA)可以容易描述各階段間之網絡關係，然而對於網路 DEA 具有輸出影響輸入關係卻無法提供任何資訊。 實務上，某些輸入是無法分割於網絡系統的對應輸出(也就是說，某些輸入可能會結合對應的輸出)且可能會影響輸入於特定時間。 本研究提出一種靜態與動態之回餽式的網路結構透過展示其回饋特性與理論介紹引入網路資料包絡分析系統。藉由台灣商業銀行資訊具有回饋系統為例說明並展示研究成果。更進一步，透過一個複雜的效率系統藉由串連方式、並聯方式與本研究提出回饋方式之分析技術說明網路效率拓樸與評估技術。This dissertation proposes a static/dynamic feedback structure for analyzing network efficiency using data envelopment analysis (DEA). The network DEA approach can easily explain the relationship among processes; however network DEA does not give any information about how the outputs of a network system may impact its inputs. In practice, certain inputs are not separable from their corresponding outputs (i.e., certain inputs may combine inputs with the corresponding outputs), and this may influence inputs during the same period. This dissertation demonstrates the characteristics of a feedback system and the theoretical reasoning behind it. We formulate feedback models using data from the interface between the process boundary and the system boundary, which contains one or more process boundaries (i.e., this interface is a point of interaction between the processes or between the system and a given process). We use these models to evaluate efficiency scores employing a banking system example with a feedback effect. Results from our feedback analysis provide more realistic efficiency scores under the feedback effect characteristics. Moreover, we also deconstruct a complicated network into three pattern types and evaluate their overall efficiency scores. After considering the feedback structure of DEA, a complex network DEA problem can be easily composed by the three types of patterns
Performance evaluation with the entropy-based weighted Russell measure in data envelopment analysis
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“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
Get PDFWe 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
Remote Monitoring and Control ofertical Cultivation in Controlled Environment
No full text本研究使用內建網路晶片的可程式化介面控制卡 (PICNIC)、多種感測器、IP攝影機與無線基地台組成無線多媒體感測網路，使用VB撰寫使用者介面軟體，建構了植物立體化栽培環控室之遠端監控軟體。軟硬體整合的系統可透過網路由遠端取得三間環控室內的空氣溫度、相對濕度、二氧化碳濃度、養液溫度與室外溫濕度等資訊，予以儲存或做為啟動控制系統之依據。 此系統同時針對環控室內內循環風扇、養液循環、二氧化碳補充、加濕、補光等設備提供手動與自動控制功能，另有影像監測系統允許對內部環境作拍照或錄影，亦提供警報功能針對環境因子或門禁開關的異常而發出簡訊給管理者。對植物在室內栽培所需的監控系統而言，本研究提出了初步的架構，感測部分尚稱完整，但控制部分是否要網路遠端來執行則仍有爭議。Programmable interface controller with network interface card (PICNIC) was used as the driven engine, integrated with various sensors, IP camera and wireless access point, the wireless multimedia sensor network (WMSN) was formed. Software written in Visual Basic was completed in this study monitor and control environmental factors as well as equipments used in three growth chambers growing Boston lettuce on multi-layer benches using artificial light as the only light source. IP camera was used and can be controlled through the software to provide snapshots or video clips. Alarming system also developed, the alarm message can also be sent to manager’s cell phone through GSM system in text or voice mail. ensing modules were developed. Imported and locally made temperature, relative humidity and carbon dioxide concentration sensors were compared. Results suggested that all domestic sensors although much cheaper but were as good as imported ones. Carbon dioxide enrichment system developed can greatly promote the growth of Boston lettuce produced in the controlled environment. The fresh weight increased from 77.5 + 16.7 to 101.6 + 15.5 g per head. he system developed in this study can not only used for growth chamber but also suitable for large scale growth chamber such as the so called plant factory. The sensing module and software can also be used in greenhouse industry. eywords: WMSN, Plant Factory, Field Server, PICNIC, Controlled Environment, Remote Monitoring and Control誌謝 i要 iibstract iii錄 iv目錄 vii目錄 xii一章 前言與研究目的 1-1 前言 1-2研究目的 2二章 文獻探討 3-1 自動化植物工廠 3-2 水耕栽培 6-3 二氧化碳對植物的影響 7-4 田間伺服器 8-5 無線感測網路、無線多媒體感測網路與應用 11三章 材料與方法 20-1 系統架構 20-2 可程式介面控制網路卡 20-2.1 PICNIC設定與方法 22-3 繼電器與固態繼電器 25-4 溫度感測 27-5 相對濕度感測 28-6溫度與相對濕度感測 30-6.1 進口的溫溼度感測器 30-6.2 本地市售的溫濕度感測器 32-6.3 溫濕度感測與數據紀錄器 33-7 二氧化碳感測 34-7-1 進口的二氧化碳感測器 34-7-2 本地市售的二氧化碳感測器 36-8 無線IP攝影機 37-9 磁簧開關 38-10電磁閥 38-11無線寬頻IP分享器 39-12 使用軟體與程式庫 40四章 結果與討論 41-1 相關硬體 41-1.1 環控室的介紹 41-1.2 感測模組 42-1.3 感測器種類與迴歸公式建立 44-1.3 二氧化碳感測器 50-2 環控室無線多媒體網路監控系統架構 52-3環控室控制系統 57-4環控室無線多媒體監控軟體 59-4.1 設定與連線 60-4.2 資料紀錄 62-4.3 遠端控制功能 63-4.4 自動控制功能 65-4.5 IP攝影機功能 66-4.6 圖影播放功能 68-4.7 濕空氣性質 69-4.8 數據即時繪圖功能 70-4.9 警報功能 72-4.10 資料查詢 74-5環控室內環境因子量測 75五章 結論 82議 83考文獻 8
Gait Recognition and Walking Exercise Intensity Estimation System
No full text心血管疾病患者常常需要經由醫師來確定患者的安全可運動強度與設計運動處方；肥胖者需要透過自主管理來控制體重。對於具有以上需求的使用者，發展一套可長時間監控的個人化運動強度紀錄系統，有其存在之必要性。
本文提出一個可行的個人化步態辨識與行走運動強度估測系統。在步態辨識部分，本文使用αβ濾波器得到精確的運動姿態，並將該姿態經過經驗模態分解(Empirical Mode Decomposition，EMD)濾除雜訊後提取傅利葉能量譜，進行線性鑑別式分析(Linear Discriminant Analysis，LDA)訓練與辨識。當辨識為走路狀態時，即進行行走運動強度估測。本文同時探討走路時物理慣性做功與運動強度的相關性。使用二次逼近與經驗模態分解(Empirical Mode Decomposition，EMD)之殘餘函數濾除加速規本身的基線飄移對於積分的嚴重影響，得到準確的瞬時速度，進而提升運動強度計算的準確性。
本文針對5男5女共10位受試者，測試四種步態(上樓、下樓、走路、跑步)之個人步態辨識在30%訓練樣本時，剩餘70%作驗證之平均準確率可達90%以上。每位受試者並進行10次不同行走速度的測試，在步數計算之平均準確率可達95%，並改善Y. Kurihara計算運動強度的方式，其迴歸方程式之相關性可由原本的0.55提升至0.81，證明本研究所採用之方法確實可提高運動強度估測之準確性。最後實作於智慧型手機，並於PC端開發使用者介面，協助了解運動中的姿態變化與演算法驗證，日後可以進一步達到遠端監控、雲端儲存、自主管理等目的。Cardiovascular disease patients need suggestions from doctors for an acceptable level of exercise intensity and exercise prescription. And over-weight patients control their weight by self-management. Developing a monitoring system which can record personalized exercise intensity is necessary for above patients.
This thesis proposes a feasible system for personalized gait recognition and walking exercise intensity estimation. On analyzing gait recognition, this thesis uses α-β filters to obtain better athletic attitudes, and further uses Empirical Mode Decomposition (EMD) to filter noise of athletic attitude to acquire Fourier Transform energy spectrum. Thus, the Linear Discriminant Analysis (LDA) can apply to this energy spectrum for training and recognition. When the motion is recognized as walking, the walking exercise intensity is estimated. This thesis also discusses the correlation between inertia work and exercise intensity by using residual function of Empirical Mode Decomposition (EMD) and quadratic approximation to filter the baseline shift of acceleration sensor to reduce the serious integral effect. And further we are can derive better exercise intensity and instantaneous speed.
This thesis uses measured 10 subjects including 5 males and 5 females to recognize four types of gait from upstairs, downstairs, walking, and running. For gait recognition, 30% of collected raw data is used for training samples, and recognition rate of verifying the 70% data can reach more than 90%. After applying our method to ten different walking speeds from each subject, we found that step calculation shows 95% accuracy, and Y.Kurihara’s exercise intensity method can be enhanced, and the regression equation correlation can be increased from 0.55 to 0.81. These results prove our method can improve exercise intensity estimation. The proposed method has been implemented on smart phones and graphic user interface on personal computers to help understanding the change of athletic stance and to verify the proposed algorithm for further application on remote monitoring, cloud computing, and self-management
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
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