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Características de fluxos e vazão de descarga em silos verticais. / Characteristics of flows and discharge flow in vertical silos.MEDEIROS, Ivanildo Freire de. 30 June 2018 (has links)
Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-06-30T15:00:33Z
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IVANILDO FREIRE DE MEDEIROS - DISSERTAÇÃO PPGEA 2012..pdf: 16736580 bytes, checksum: 9cf0bb7af38d77f20a6f48a3a8439d88 (MD5)
Previous issue date: 2012-03 / Hoje com o avanço na agroindústria, o uso de silos é indispensável para que se
mantenha a qualidade de produtos como grãos, sementes e demais insumos agrícolas.
Em silos existem, basicamente, dois tipos de fluxo, o fluxo de massa e o fluxo de funil,
onde o fluxo de massa é caracterizado pelo movimento de todas as partículas do
produto, enquanto que no fluxo de funil existem três camadas, onde a primeira camada
está se movimentando, a segunda camada fica a espera para que possa entrar em
movimento e a terceira permanece estagnada durante todo o processo. Objetivou-se com
esta pesquisa documentar e avaliar através de imagens de alta resolução o padrão de
fluxo e suas variantes em silos industriais através de modelo reduzido de seção
semicircular e mensurar sua vazão de descarga para quatro produtos armazenáveis. Para
a análise das propriedades de fluxo utilizou-se a recomendação da British Material
Handling Board enquanto que os resultados de vazão experimental foram comparados
aos teóricos obtidos pelas equações de Beverloo et al. e Rotter. Observou-se que quando
utilizado o fundo plano com grãos, ocorria o fluxo de massa até determinada relação
H/D passando, depois, para fluxo de funil. Para farelo de soja o fluxo o fluxo variou de
acordo com a geometria do silo (fundo plano ou tremonha) entre massa e funil,
enquanto para milho triturado o tipo de fluxo observado foi o de funil
independentemente da utilização de fundo plano ou tremonha. Quanto aos valores de
vazão de descarga, nenhuma das teorias testadas conseguiu reproduzir com exatidão os
resultados experimentais indicando necessidade de adequação para cada situação em
particular. / Today with the advancement in the agricultural industry, the use of silos is
essential in order to maintain the quality of products such as grains, seeds and
other agricultural inputs. Silo are basically two flow patterns, the mass flow and
funnel flow, where the mass flow is characterized by the movement of ali particles
in the product, while the funnel flow, there are three one, where the first layer is
moving the second one is waiting for it to come in motion and the third remains
flat during the process. The objective of this research were to document and assess
through high resolution images of the flow pattern and its variants in silos through
industrial scale model of semicircular cross section and measure its flow
discharge for four bulk solids. For the analysis of the flow was used British
Material Handling Board recommendations while the flow experimental results
were obtained compared to the theoretical equations of Beverloo et al. and Rotter.
It was observed that when using a flat bottom, there was the mass flow
determined by H/D ratio passing then to flow funnel. For soybean flow varied
depending on the geometry of the silo (flat bottom or hopper) between mass and
dropping funnel, while for ground corn, the type of flow was observed regardless
of the funnel using a flat or hopper. For the values of flow discharge, none of the
theories tested was able to reproduce accurately the experimental results
indicating a need to adapt them to each particular situation.
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Služba pro ověření spolehlivosti a pečlivosti českých advokátů / A Service for Verification of Czech AttorneysJílek, Radim January 2017 (has links)
This thesis deals with the design and implementation of the Internet service, which allows to objectively assess and verify the reliability and diligence of Czech lawyers based on publicly available data of several courts. The aim of the thesis is to create and put into operation this service. The result of the work are the programs that provide partial actions in the realization of this intention.
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Detekce škodlivých webových stránek pomocí strojového učení / Detection of Malicious Websites using Machine LearningŠulák, Ladislav January 2018 (has links)
Táto práca sa zaoberá problematikou škodlivého kódu na webe so zameraním na analýzu a detekciu škodlivého JavaScriptu umiestneného na strane klienta s využitím strojového učenia. Navrhnutý prístup využíva známe i nové pozorovania s ohľadom na rozdiely medzi škodlivými a legitímnymi vzorkami. Tento prístup má potenciál detekovať nové exploity i zero-day útoky. Systém pre takúto detekciu bol implementovaný a využíva modely strojového učenia. Výkon modelov bol evaluovaný pomocou F1-skóre na základe niekoľkých experimentov. Použitie rozhodovacích stromov sa podľa experimentov ukázalo ako najefektívnejšia možnosť. Najefektívnejším modelom sa ukázal byť Adaboost klasifikátor s dosiahnutým F1-skóre až 99.16 %. Tento model pracoval s 200 inštanciami randomizovaného rozhodovacieho stromu založeného na algoritme Extra-Trees. Viacvrstvový perceptrón bol druhým najlepším modelom s dosiahnutým F1-skóre 97.94 %.
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Untersuchen von internetbasierten Videostreamingverfahren und -techniken auf Verwendbarkeit für regionale FernsehsenderMeixner, Christian 02 July 2007 (has links)
Im Rahmen der vorliegenden Diplomarbeit werden browserbasierte Videoüber-tragungslösungen bezüglich ihrer Verwendbarkeit zur Übertragung des Fernsehprogramms regionaler Fernsehsender auf das Medium Internet untersucht, mit dem Ziel eine Prototypanwendung auf Basis der gemäß den Anforderungen der Regionalsender am besten geeigneten Technik zu implementieren.
Grundlage der Untersuchung bildet eine Gegenüberstellung der am Markt be-findlichen Videosysteme mit Webbrowserunterstützung QuickTime, RealVideo, Windows Media, Adobe Flash und Java. Die Systeme werden bezüglich ihres Leistungsumfangs, der Flexibilität ihrer Einsatzmöglichkeiten, der Qualität der zugrundeliegenden Videocodecs und ihrer Verbreitung im Internet verglichen.
Anhand der gemeinsam mit den Regionalsendern KabelJournal und Sachsenfernsehen ermittelten Anforderungen an ein Videosystem zur Übertragung ihres Programms im Internet, erweist sich Adobe Flash Video durch seine hohe Verbreitung, seine flexiblen Einsatzmöglichkeiten und seiner Unterstützung von Bewegtbild-, Standbild- und interaktiven Animationsmedien als am besten geeignet.
Die im Rahmen dieser Arbeit erstellte Implementierung einer Web-TV Anwen-dung auf Basis von Adobe Flash zeigt bei der Ermittlung von konkreten Einsatzszenarien bei den Sendern KabelJournal und Sachsenfernsehen, dass durch die multimediale Auslegung, die flexiblen Medienkombinationsmöglichkeiten und die offene XML-Schnittstelle mehr als eine bloße Portierung des TV-Programms ins Internet mit gleichzeitig geringem Aufwand möglich ist. Die Web-TV Anwendung ist eine einfach einsetzbare aber höchst vielseitige Möglichkeit für Regionalsender neue Märkte zu erschließen. / Within the present diploma thesis, established web browser based video solu-tions are examined for their use as internet broadcasting system for local TV stations, with the intention of implementing a broadcasting solution based on the technique matching the requirements of local TV stations best.
Basis of this examination is the comparison of the web video solutions Quick-Time, RealVideo, Windows Media, Adobe Flash and Java. These systems are compared by their multimedia support, flexibility of use, quality of the video co-decs they use and their market penetration.
On the basis of the requirements of local TV stations, determined together with KabelJournal and Sachsenfernsehen, adobe flash is the most satisfying solution to build a Web TV application upon. Its market penetration, flexibility of use and its support for still images, videos and interactive animations match those requirements best.
The implementation of the Web TV application based on adobe flash proofs its great flexibility, ease of use and its diverse variations in combining different me-dia, at the determination of concrete use cases together with KabelJournal and Sachsenfernsehen. It shows that this is an easy but high potential way to enter new markets for local TV stations.
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Evaluation of a content download service based on FLUTE and LDPC for improving the Quality of Experience over multicast wireless networksDe Fez Lava, Ismael 17 April 2014 (has links)
Esta tesis estudia la distribución de ficheros en redes inalámbricas, analizando diferentes mecanismos que permiten
optimizar la transmisión en términos de ancho de banda y calidad de experiencia. Concretamente, la tesis se centra
en la transmisión de ficheros en canales multicast. Dicha transmisión resulta adecuada en ciertos entornos y tiene
múltiples aplicaciones, algunas de las cuales se presentan en este trabajo.
La tesis analiza en profundidad FLUTE (File Delivery over Unidirectional Transport), un protocolo para el envío
fiable de ficheros en canales unidireccionales, y presenta algunas propuestas para mejorar la transmisión a través de
dicho protocolo. En este sentido, una de las bases de este protocolo es el uso de un mecanismo llamado Tabla de
Envío de Ficheros (FDT), que se utiliza para describir los contenidos transmitidos. Este trabajo analiza cómo la
transmisión de la FDT afecta al funcionamiento del protocolo FLUTE, y proporciona una metodología para
optimizar el envío de contenido mediante FLUTE.
Por otro lado, en la transmisión de ficheros por multicast resulta esencial ofrecer un servicio fiable. Entre los
distintos mecanismos utilizados por FLUTE para ofrecer fiabilidad, este trabajo analiza principalmente los códigos
de corrección AL-FEC (Application Layer ¿ Forward Error Correction), los cuales añaden redundancia a la
transmisión para minimizar los efectos de las pérdidas en el canal. Al respecto, esta tesis evalúa los códigos LDPC
Staircase y LDPC Triangle, comparando su funcionamiento bajo diferentes condiciones de transmisión.
Además, en el caso de tener un canal de retorno, una de las principales contribuciones de esta tesis es la propuesta de
códigos LDPC adaptativos para servicios de descarga de ficheros. En esta clase de códigos, el servidor de
contenidos cambia dinámicamente la cantidad de protección FEC proporcionada en función de las pérdidas que
detectan los usuarios. La evaluación demuestra el buen funcionamiento de estos códigos en distintos entornos. / De Fez Lava, I. (2014). Evaluation of a content download service based on FLUTE and LDPC for improving the Quality of Experience over multicast wireless networks [Tesis doctoral]. Editorial Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/37051 / TESIS / Premios Extraordinarios de tesis doctorales
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Why do We Choose This App? A Comparison of Mobile Application Adoption Between Chinese and US College StudentsZhang, Chenjie 25 July 2018 (has links)
No description available.
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Jämförelse av cache-tjänster: WSUS Och LanCache / Comparison of cache services: WSUS and LanCacheShammaa, Mohammad Hamdi, Aldrea, Sumaia January 2023 (has links)
Inom nätverkstekniken och datakommunikationen råder idag en tro på tekniken nätverkscache som kan spara data för att senare kunna hämta hem det snabbare. Tekniken har genom åren visat att den effektivt kan skicka den önskade data till sina klienter. Det finns flera cache-tjänster som använder tekniken för Windows-uppdateringar. Bland dessa finns Windows Server Update Services (WSUS) och LanCache. På uppdrag från företaget TNS Gaming AB jämförs dessa tjänster med varandra under examensarbetet. Nätverkscache är ett intressant forskningsområde för framtida kommunikationssystem och nätverk tack vare sina fördelar. Likaså är uppgiften om att jämföra cache-tjänsterna WSUS och LanCache intressant i och med det öppnar upp insikt om vilken tjänst är bättre för företaget eller andra intressenter. Både forskningsområdet och uppgiften är viktiga och intressanta när användare vill effektivisera användningen av internetanslutningen och bespara nätverksresurser. Därmed kan tekniken minska nedladdningstiden. Till det här arbetet besvaras frågor om vilken nätverksprestanda, resursanvändning och administrationstid respektive cache-tjänst har, och vilken cache-tjänst som lämpar sig bättre för företagets behov. I arbetet genomförs experiment, som omfattar tre huvudmättningar, och följs av en enfallstudie. Syftet med arbetet är att med hjälp av experimentets mätningar få en jämförelse mellan WSUS och LanCache. Resultatet av arbetet utgör sedan ett underlag för det framtida lösningsvalet. Resultaten består av två delar. Den första visar att båda cache-tjänsterna bidrar till kortare nedladdningstider. Den andra är att LanCache är bättre än WSUS när det gäller nätverksprestanda och resursanvändning, samt mindre administrationstid jämfört med WSUS. Givet resultat dras slutsatsen att LanCache är cache-tjänsten som är mest lämpad i det här fallet. / In the field of network technology and data communication, there is a current belief in the technology of network caching, which can store data to later retrieve it more quickly. Over the years, this technology has proven its ability to efficiently deliver the desired data to its clients. There are several caching services that utilize this technology for Windows updates, among them are Windows Server Update Services (WSUS) and LanCache. On behalf of the company TNS Gaming AB, these services are compared to each other in this thesis. Network caching is an interesting area of research for future communication systems and networks due to its benefits. Likewise, the task of comparing the cache services WSUS and LanCache is interesting as it provides insights into which service is better suited for the company or other stakeholders. Both the research area and the task are important and intriguing when users seek to streamline the use of their internet connection and conserve network resources. Thus, the technology can reduce download times. For this work, questions about the network performance, resource usage, and administration time of each cache service are answered, as well as which cache service that is better suited to the company's needs. The work involves conducting experiments, including three main measurements, followed by a single case study. The purpose of the work is to compare WSUS and LanCache using the measurements from the experiment. The outcome of the work then forms a basis for future solution choice. The results consist of two parts. The first shows that both cache services contribute to shorter download times. The second is that LanCache outperforms WSUS in terms of network performance and resource usage, and also requires less administration time than WSUS. Given the results, the conclusion is drawn that LanCache is the most suitable caching service in this case.
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Web applications using the Google Web Toolkit / Webanwendungen unter Verwendung des Google Web Toolkitsvon Wenckstern, Michael 04 June 2013 (has links) (PDF)
This diploma thesis describes how to create or convert traditional Java programs to desktop-like rich internet applications with the Google Web Toolkit.
The Google Web Toolkit is an open source development environment, which translates Java code to browser and device independent HTML and JavaScript.
Most of the GWT framework parts, including the Java to JavaScript compiler as well as important security issues of websites will be introduced.
The famous Agricola board game will be implemented in the Model-View-Presenter pattern to show that complex user interfaces can be created with the Google Web Toolkit.
The Google Web Toolkit framework will be compared with the JavaServer Faces one to find out which toolkit is the right one for the next web project. / Diese Diplomarbeit beschreibt die Erzeugung desktopähnlicher Anwendungen mit dem Google Web Toolkit und die Umwandlung klassischer Java-Programme in diese.
Das Google Web Toolkit ist eine Open-Source-Entwicklungsumgebung, die Java-Code in browserunabhängiges als auch in geräteübergreifendes HTML und JavaScript übersetzt.
Vorgestellt wird der Großteil des GWT Frameworks inklusive des Java zu JavaScript-Compilers sowie wichtige Sicherheitsaspekte von Internetseiten.
Um zu zeigen, dass auch komplizierte graphische Oberflächen mit dem Google Web Toolkit erzeugt werden können, wird das bekannte Brettspiel Agricola mittels Model-View-Presenter Designmuster implementiert.
Zur Ermittlung der richtigen Technologie für das nächste Webprojekt findet ein Vergleich zwischen dem Google Web Toolkit und JavaServer Faces statt.
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Web applications using the Google Web Toolkitvon Wenckstern, Michael 05 June 2013 (has links)
This diploma thesis describes how to create or convert traditional Java programs to desktop-like rich internet applications with the Google Web Toolkit.
The Google Web Toolkit is an open source development environment, which translates Java code to browser and device independent HTML and JavaScript.
Most of the GWT framework parts, including the Java to JavaScript compiler as well as important security issues of websites will be introduced.
The famous Agricola board game will be implemented in the Model-View-Presenter pattern to show that complex user interfaces can be created with the Google Web Toolkit.
The Google Web Toolkit framework will be compared with the JavaServer Faces one to find out which toolkit is the right one for the next web project.:I Abstract
II Contents
III Acronyms and Glossary
III.I Acronyms
III.II Glossary
IV Credits
1 Introduction
2 Basics
2.1 Development of the World Wide Web
2.2 Hypertext Markup Language
2.3 Cascading Style Sheets
2.4 JavaScript
2.5 Hypertext Markup Language Document Object Model
2.6 Asynchronous JavaScript and XML
3 GWT toolbox and compiler
3.1 GWT in action
3.2 A short overview of the toolkit
3.3 GWT compiler and JSNI
3.3.1 Overview of GWT compiler and JSNI
3.3.2 Deferred binding and bootstrapping process
3.3.3 GWT compiler steps and optimizations
3.4 Java Runtime Environment Emulation
3.5 Widgets and Panels
3.5.1 Overview of GWT Widgets
3.5.2 Event handlers in GWT Widgets
3.5.3 Manipulating browser’s DOM with GWT DOM class
3.5.4 GWT Designer and view optimization using UiBinder
3.6 Remote Procedure Calls
3.6.1 Comparison of Remote Procedure Calls with Remote Method Invocations
3.6.2 GWT’s RPC service and serializable whitelist
3.7 History Management
3.8 Client Bundle
3.8.1 Using ImageResources in the ClientBundle interface
3.8.2 Using CssResources in the ClientBundle interface
4 Model-View-Presenter Architecture
4.1 Comparison of MVP and MVC
4.2 GWT Model-View-Presenter pattern example: Agricola board game
4.3 Extending the Agricola web application with mobile views
4.4 Introducing activities in the Agricola Model-View-Presenter pattern enabling browser history
5 Comparison of the two web frameworks: GWT and JSF
5.1 Definitions of comparison fields
5.2 Comparison in category 1: Nearly completely static sites with a little bit of dynamic content, e.g. news update
5.3 Comparison in category 2: Doing a survey in both technologies
5.4 Comparison in category 3: Creating a forum to show data
5.5 Comparison in category 4: Writing a chat application
5.6 Comparison in category 5: Writing the speed game Snake
5.7 Summary
6 Security
6.1 Download Tomcat
6.2 Dynamic Web Application Project with GWT and Tomcat
6.3 Establish HTTPS connections in Tomcat
6.3.1 Create a pem certificate
6.3.2 Convert pem certificate into a key store object
6.3.3 Configure Tomcat’s XML files to enable HTPPS
6.4 Establish a database connection in Tomcat
6.4.1 Create TomcatGWT user and schema, and add the table countries
6.4.2 Configure Tomcat’s XML files to get access to the database connection
6.4.3 PreparedStatements avoid MySQL injections
6.5 Login mechanism in Tomcat
6.6 SafeHtml
7 Presenting a complex software application written in GWT
8 Conclusions
8.1 Summary
8.2 Future work
A Appendix
A 1 Configure the Google Web Toolkit framework in Eclipse
A 1.1 Install the Java Developer Kit
A 1.2 Download Eclipse
A 1.3 Install the GWT plugin in Eclipse
A 1.4 Create first GWT Java Project
A 2 Figures
A 3 Listings
A 3.1 Source code of the Agricola board game
A 3.2 Source code of GWT and JSF comparison
A 4 Tables
R Lists and References
R 1 Lists
R 1.1 List of Tables
R 1.2 List of Figures
R 1.3 List of Listings
R 2 References
R 2.1 Books
R 2.2 Online resources / Diese Diplomarbeit beschreibt die Erzeugung desktopähnlicher Anwendungen mit dem Google Web Toolkit und die Umwandlung klassischer Java-Programme in diese.
Das Google Web Toolkit ist eine Open-Source-Entwicklungsumgebung, die Java-Code in browserunabhängiges als auch in geräteübergreifendes HTML und JavaScript übersetzt.
Vorgestellt wird der Großteil des GWT Frameworks inklusive des Java zu JavaScript-Compilers sowie wichtige Sicherheitsaspekte von Internetseiten.
Um zu zeigen, dass auch komplizierte graphische Oberflächen mit dem Google Web Toolkit erzeugt werden können, wird das bekannte Brettspiel Agricola mittels Model-View-Presenter Designmuster implementiert.
Zur Ermittlung der richtigen Technologie für das nächste Webprojekt findet ein Vergleich zwischen dem Google Web Toolkit und JavaServer Faces statt.:I Abstract
II Contents
III Acronyms and Glossary
III.I Acronyms
III.II Glossary
IV Credits
1 Introduction
2 Basics
2.1 Development of the World Wide Web
2.2 Hypertext Markup Language
2.3 Cascading Style Sheets
2.4 JavaScript
2.5 Hypertext Markup Language Document Object Model
2.6 Asynchronous JavaScript and XML
3 GWT toolbox and compiler
3.1 GWT in action
3.2 A short overview of the toolkit
3.3 GWT compiler and JSNI
3.3.1 Overview of GWT compiler and JSNI
3.3.2 Deferred binding and bootstrapping process
3.3.3 GWT compiler steps and optimizations
3.4 Java Runtime Environment Emulation
3.5 Widgets and Panels
3.5.1 Overview of GWT Widgets
3.5.2 Event handlers in GWT Widgets
3.5.3 Manipulating browser’s DOM with GWT DOM class
3.5.4 GWT Designer and view optimization using UiBinder
3.6 Remote Procedure Calls
3.6.1 Comparison of Remote Procedure Calls with Remote Method Invocations
3.6.2 GWT’s RPC service and serializable whitelist
3.7 History Management
3.8 Client Bundle
3.8.1 Using ImageResources in the ClientBundle interface
3.8.2 Using CssResources in the ClientBundle interface
4 Model-View-Presenter Architecture
4.1 Comparison of MVP and MVC
4.2 GWT Model-View-Presenter pattern example: Agricola board game
4.3 Extending the Agricola web application with mobile views
4.4 Introducing activities in the Agricola Model-View-Presenter pattern enabling browser history
5 Comparison of the two web frameworks: GWT and JSF
5.1 Definitions of comparison fields
5.2 Comparison in category 1: Nearly completely static sites with a little bit of dynamic content, e.g. news update
5.3 Comparison in category 2: Doing a survey in both technologies
5.4 Comparison in category 3: Creating a forum to show data
5.5 Comparison in category 4: Writing a chat application
5.6 Comparison in category 5: Writing the speed game Snake
5.7 Summary
6 Security
6.1 Download Tomcat
6.2 Dynamic Web Application Project with GWT and Tomcat
6.3 Establish HTTPS connections in Tomcat
6.3.1 Create a pem certificate
6.3.2 Convert pem certificate into a key store object
6.3.3 Configure Tomcat’s XML files to enable HTPPS
6.4 Establish a database connection in Tomcat
6.4.1 Create TomcatGWT user and schema, and add the table countries
6.4.2 Configure Tomcat’s XML files to get access to the database connection
6.4.3 PreparedStatements avoid MySQL injections
6.5 Login mechanism in Tomcat
6.6 SafeHtml
7 Presenting a complex software application written in GWT
8 Conclusions
8.1 Summary
8.2 Future work
A Appendix
A 1 Configure the Google Web Toolkit framework in Eclipse
A 1.1 Install the Java Developer Kit
A 1.2 Download Eclipse
A 1.3 Install the GWT plugin in Eclipse
A 1.4 Create first GWT Java Project
A 2 Figures
A 3 Listings
A 3.1 Source code of the Agricola board game
A 3.2 Source code of GWT and JSF comparison
A 4 Tables
R Lists and References
R 1 Lists
R 1.1 List of Tables
R 1.2 List of Figures
R 1.3 List of Listings
R 2 References
R 2.1 Books
R 2.2 Online resources
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