<p>Piping is an essential component in buildings, and its as-built information is critical to facility management tasks. Manually extracting piping information from legacy drawings that are in paper, PDF, or image format is mentally exerting, time-consuming, and error-prone. Symbol recognition and detection are core problems in the computer-based interpretation of piping drawings, and the main technical challenge is to determine robust features that are invariant to scaling, rotation, and translation. This thesis aims to use convolutional neural networks (CNNs) to automatically extract features from raw images, and consequently, to locate and recognize symbols in piping drawings.</p> <p>In this thesis, the Spatial Transformer Network (STN) is applied to improve the performance of a standard CNN model for recognizing piping symbols, and the Faster Region-based Convolutional Neural Network (Faster RCNN) is adopted to exploit its capacity in symbol detection. For experimentation, the synthetic data are generated as follows. Two datasets are generated for symbol recognition and detection, respectively. For recognition, eight types of symbols are synthesized based on the geometric constraints between the primitives. The drawing samples for detection are manually sketched using AutoCAD MEP software and its piping component library, and seven types of symbols are selected from the piping component library. Both sets of samples are augmented with various scales, rotations, and random noises.</p> <p>The experiment for symbol recognition is conducted and the accuracies of the recognition accuracy of the CNN + STN model and the standard CNN model are compared. It is observed that the spatial transformer layer improves the accuracy in classifying piping symbols from 95.39% to 98.26%. For the symbol detection task, the experiment is conducted using a public implementation of Faster RCNN. The mean Average Precision (mAP) is 82.8% when Intersection over Union (IoU) threshold equals to 0.5. Imbalanced data (i.e., imbalanced samples in each class) led to a decrease in the Average Precision in the minority class. Also, the symbol library, the small dataset, and the complex backbone network limit the generality of the model. Future work will focus on the collection of larger set of drawings and the improvement of the network’s geometric invariance.</p>

Carregamentos transientes termo hidráulicos do tipo Steam Hammer são eventos comuns em sistemas de tubulações de vapor com grandes potenciais de catástrofes em plantas de geração de energia. Uma vez iniciado o evento, ondas de pressões são geradas com amplitudes, geralmente, de grande magnitude ocasionando altas pressões no sistema, ruídos, deformações, fadiga, com possibilidade de danos materiais e econômicos e em casos extremos fatalidades. Os procedimentos da indústria para análise deste tipo de sistema consistem realização de análises estáticas equivalentes ou análise de espectro de resposta com carregamentos caracterizados por meio de métodos analíticos baseados em hipóteses simplificadoras do fluido e fluxo. Neste trabalho é proposta a analise de sistema de tubulações por meio do método de integração numérica com superposição modal e carregamento caracterizado por método numérico com base no método das características. Comparações foram efetuadas entre os resultados obtidos pela metodologia proposta e os procedimentos da indústria, demonstrando que, dado ao alto grau de conservadorismo, os procedimentos da indústria acarretam em superdimensionamento de estruturas e tubulações ocasionando custos adicionais de projeto, sendo a otimização do projeto obtida aplicando-se a metodologia proposta no trabalho. / Steam Hammer is a common transient thermo hydraulic event in steam piping systems with potential to cause serious damages in power generation plants. It generates pressure waves, generally of great amplitude and magnitude, causing high pressures in the system, associated with noise, with possible material and economic damages and, in extreme case, even fatalities. Industry procedures for analysis of these events consists of performing equivalent static analysis, or response spectrum analysis, with transient loadings calculated by analytical methods based on assumptions of fluid and flow. This paper proposes a new methodology for the piping system analysis by the numerical integration method with modal superposition and transient loadings calculated by a numerical method based on the method of characteristics. Comparisons were made between the results obtained by the proposed methodology and the stablished industry procedures, confirming that, due to the high degree of conservatism, industry procedures can lead to additional cost to the design, with the optimization of the design being obtained by applying the methodology proposed in this paper.

This thesis investigated the different aspects and mechanisms of leak-before-break (LBB) assessment. The main objective was to improve the understanding of the transition between surface and through wall defects. While existing procedures generally idealise the through-wall crack into a rectangular shape, in reality a crack propagates with a shape depending on the loading. Comparison between the related solutions from established procedures have been undertaken. The apparent variation depending on the solutions used in the assessment has been highlighted. Two different methodologies have been employed to investigate the transition of flaw: (i) non-ideal through-wall and (ii) surface-breaking flaw propagation. The first approach consists of numerical models of non-idealised flaws in order to assess the effect on LBB parameters. For the second approach, experiments have been first carried out to visualise the shape of defect growths. To further study surface-breaking flaws, both experimental and numerical studies were performed. Fatigue tests on deeply notched plates with two crack aspect ratios were carried out. Strain evolutions on the back surface were recorded along the axes parallel and perpendicular to the crack. Numerical models have been prepared to investigate a larger scope. Behaviour of growing surface-breaking defects was examined. Based on the work conducted in this research, the major findings can be summarised as follows: - The existing solutions to carry out a LBB assessment using available procedures were reviewed and discussed. For axial flaws, SIF solutions were found similar and in good agreement with FEA values. Reference stress solutions showed significant difference between BS 7910 and API 579-1/ASME FFS-1. When compared to experimental data, API's solutions were able to distinguish between leak and break cases. - Flaw geometry assumption for through-wall crack yet to become idealised did not always reflect the actual behaviour, especially for COA calculation. In this case, FEA can be used as a good predictive tool for LBB to estimate margins when assessing leak rate. - The experiment using metallic specimens showed that high stress/strain on back surface would provide a good estimate of the crack propagation as it approached break-through. This offers a more accurate monitoring mechanism. Strain-mapping devices such as gauges could be used.

As a modern metropolis, Shanghai has a registered population of 18.8 million in 2011, and the permanent population has been more than 20 million. As a result, Shanghai produces more than 6.3 million cubic meters of sewage per day which is considered as a massive test for Shanghai’s sewerage treatment system. Given the high proportion of time spent on the literature review, this study has investigated how the whole system works in Shanghai. To do this, Shanghai sewerage systems were divided into two parts – the drainage system and the sewage treatment system, and they were introduced respectively following the track of history development process. It was done by combining previously published theses, study reports, governmental documents, overt information by companies and news reports. It showed that, in 2009, Shanghai’s government established a basic formation of six centralized sewage treatment systems in co-existence with 52 sewage treatment plants. In the same year, the sewage treatment rate reached 78.9%, which can be considered a leap compared with the 62.8% figure in 2003. In spite of that, the gap between sewage treatment in Shanghai and that in developed countries still exists. By comparing Shanghai Bai Longgang sewage treatment plant with Halmstad Västra Stranden's waste water treatment plant, it can be concluded that the gap was embodied in differences of inflow condition, relative low discharge standards and poor treatment capability.

Darbą sudaro 52 puslapiai; panaudota 18 literatūros šaltinių. Darbe yra 41 paveikslai ir 12 lentelių. Baigiamąjį darbą sudaro: Lietuvos ir ES nutekamųjų vandenų tvarkymo politika, Lietuvos Respublikos įstatymų ir reglamentų apžvalga, Europos gyvenviečių nuotekų valymo situacija, nuotekų surinkimo sistemos ir vamzdynų apžvalga ir aplinkos tarša nutekamaisiais vandenimis. Pagrindinis darbo tikslas išanalizuoti Šilutės rajono (Ž.Naumiesčio, Saugų, Juknaičių ir Švėkšnos) miestelių nuotekų valyklų darbo efektyvumą ir lauko nuotakynų būklę. Tyrimų rezultatai: Šilutės raj. nuotekų surenkama 32 % daugiau negu sunaudojam geriamojo vandens, o nuotekų surinkimo sistema naudojasi tik 42 % gyventojų. Per susidėvėjusius vamzdynus į nuotekų valyklas patenka, net iki 7 kartų, daugiau nuotekų nei, jų projektinis pajėgumas. Tyrinėtos nuotekų valyklos Šilutės raj. nuotekas išvalo iki šiuo metu galiojančių normų, o procentinis teršalų sumažinimas siekia net 98,2 %. / The work contains 52 p. of explaining text. There are 12 tables, 41 pictures. 18 sources of literature have being in the work. The work consists of: Lithuania and the EU's wastewater treatment policies, review of the laws and regulations of the Republic of Lithuania, the wastewater treatment situation in the EU, wastewater collection systems and pipelines, and review of environmental pollution with wastewater. The main purpose is to analyse the situation of wastewater treatment plans work efficiency, and the condition of sewege colection pipelines. Research results: In Silute district. wastewater is collected 32% more than the consumption of drinking water and wastewater collection system used by only 42% of the population. Worn over the pipelines to the sewage treatment plant fall, even up to 7 times more wastewater than they can clean. Studied sewage treatment plants in Silute district clean up to current standards, and the percentage of emission reductions is up to 98.2%.

Carregamentos transientes termo hidráulicos do tipo Steam Hammer são eventos comuns em sistemas de tubulações de vapor com grandes potenciais de catástrofes em plantas de geração de energia. Uma vez iniciado o evento, ondas de pressões são geradas com amplitudes, geralmente, de grande magnitude ocasionando altas pressões no sistema, ruídos, deformações, fadiga, com possibilidade de danos materiais e econômicos e em casos extremos fatalidades. Os procedimentos da indústria para análise deste tipo de sistema consistem realização de análises estáticas equivalentes ou análise de espectro de resposta com carregamentos caracterizados por meio de métodos analíticos baseados em hipóteses simplificadoras do fluido e fluxo. Neste trabalho é proposta a analise de sistema de tubulações por meio do método de integração numérica com superposição modal e carregamento caracterizado por método numérico com base no método das características. Comparações foram efetuadas entre os resultados obtidos pela metodologia proposta e os procedimentos da indústria, demonstrando que, dado ao alto grau de conservadorismo, os procedimentos da indústria acarretam em superdimensionamento de estruturas e tubulações ocasionando custos adicionais de projeto, sendo a otimização do projeto obtida aplicando-se a metodologia proposta no trabalho. / Steam Hammer is a common transient thermo hydraulic event in steam piping systems with potential to cause serious damages in power generation plants. It generates pressure waves, generally of great amplitude and magnitude, causing high pressures in the system, associated with noise, with possible material and economic damages and, in extreme case, even fatalities. Industry procedures for analysis of these events consists of performing equivalent static analysis, or response spectrum analysis, with transient loadings calculated by analytical methods based on assumptions of fluid and flow. This paper proposes a new methodology for the piping system analysis by the numerical integration method with modal superposition and transient loadings calculated by a numerical method based on the method of characteristics. Comparisons were made between the results obtained by the proposed methodology and the stablished industry procedures, confirming that, due to the high degree of conservatism, industry procedures can lead to additional cost to the design, with the optimization of the design being obtained by applying the methodology proposed in this paper.

Made available in DSpace on 2014-12-17T14:06:56Z (GMT). No. of bitstreams: 1 EugenioOO_DISSERT.pdf: 4689753 bytes, checksum: 3bf8e997d1b94d1858f0a0c5652f05b0 (MD5) Previous issue date: 2010-11-19 / Pipelines for the transport of crude oil from the production wells to the collecting stations are named production lines . These pipes are subjected to chemical and electrochemical corrosion according to the environment and the type of petroleum transported. Some of these lines, depending upon the composition of the fluid produced, may leak within less than one year of operation due to internal corrosion. This work aims at the development of composite pipes with an external protecting layer of high density polyurethane for use in production lines of onshore oil wells, meeting operational requirements. The pipes were manufactured using glass fibers, epoxy resin, polyester resin, quartz sand and high density polyurethane. The pipes were produced by filament winding with the deposition of high density polyurethane on the external surface and threaded ends (API 15 HR/PM-VII). Three types of pipes were manufactured: glass/epoxy, glass/epoxy with an external polyurethane layer and glass/epoxy with an intermediate layer of glass fiber, polyester, sand and with an external polyurethane layer. The three samples were characterized by Scanning Electronic Microscopy (SEM) and for the determination of constituent content. In addition, the following tests were conducted: hydrostatic test, instant rupture, shorttime failure pressure, Gardner impact, transverse stiffness and axial tension. Field tests were conducted in Mossor? RN (BRAZIL), where 1,677 meters of piping were used. The tests results of the three types of pipes were compared in two events: after two months from manufacturing of the samples and after nine months of field application. The results indicate that the glass/epoxy pipes with an intermediate layer of fiber glass composite, polyester e sand and with an external layer of high density polyurethane showed superior properties as compared to the other two and met the requirements of pressure class, axial tensile strength, transverse stiffness, impact and environmental conditions, for onshore applications as production lines / As tubula??es para transporte de petr?leo dos po?os de produ??o at? a esta??o coletora s?o denominadas de linhas de surg?ncia . Essas tubula??es est?o sujeitas ? corros?o qu?mica e eletroqu?mica, de acordo com o ambiente e os tipos de petr?leo. Algumas dessas linhas, a depender da composi??o do petr?leo produzido falham, ?s vezes, com menos de um ano de opera??o, devido ? corros?o interna severa. Este trabalho objetiva o desenvolvimento de tubula??o em comp?sito revestida externamente com poliuretano de alta densidade, para aplica??o em linhas de surg?ncia de po?os de petr?leo onshore e que atenda ?s exig?ncias operacionais. Neste desenvolvimento foram empregados fibra de vidro, resina ep?xi, resina poli?ster, areia quartzosa e poliuretano (PU) de alta densidade. Os tubos foram produzidos pelos processos de enrolamento filamentar com deposi??o de PU na superf?cie externa e extremidades com rosca moldada (API 15 HR e PM-VII). Foram produzidas tr?s concep??es de tubos: vidro/ep?xi sem revestimento, vidro/ep?xi revestido com poliuretano de alta densidade e vidro/ep?xi coberto por um composto de fibra de vidro, poli?ster e areia, revestido externamente com poliuretano de alta densidade. Amostras das tr?s concep??es foram caracterizadas atrav?s da t?cnica de Microscopia Eletr?nica de Varredura (MEV), da determina??o do teor de vidro e resina, dos ensaios de rigidez e tra??o axial e dos testes hidrost?ticos, ruptura instant?nea, press?o de curta dura??o e impacto Gardner. Essa nova tecnologia foi testada no campo de produ??o em Mossor? RN, nos quais foram instalados 1.677 metros de tubos. Assim, os resultados dos ensaios e testes das tr?s concep??es de tubos foram comparados entre si em dois eventos: ap?s dois meses da fabrica??o das amostras e ap?s nove meses da aplica??o dos tubos em campo. Os dados indicaram que o tubo em comp?sito vidro/ep?xi, poli?ster e areia, revestido externamente com poliuretano de alta densidade , apresentou melhores resultados quando comparado aos outros dois, podendo ser usado na ind?stria de petr?leo em aplica??es onshore , como uma alternativa para a aplica??o em linhas de surg?ncia, atendendo ?s exig?ncias de classe de press?o, resist?ncia ? tra??o axial, rigidez, impacto e intemp?ries

Este trabalho é uma análise formal da construção das orações relativas em contextos de sintagmas preposicionais no português oral culto de Porto Alegre em que a preposição não está visível na forma fonética, apesar de a gramática normativa exigi-la. Antes da realização da análise propriamente dita, relembramos a estrutura e a classificação das orações relativas, os pronomes relativos empregados com ou sem preposições e algumas particularidades e inovações dessas estruturas que vêm surgindo no PB, além de apresentar o panorama da gramática gerativa até o modelo de Princípios e Parâmetros, destacando as abordagens gerativas mais relevantes sobre a construção Relativa Cortadora. A análise baseia-se em dados coletados em 24 (vinte e quatro) inquéritos, que correspondem a 24 (vinte e quatro) informantes, registrados no corpus do projeto NURC – Norma Urbana Culta – que totalizam 300 (trezentos) períodos de análise. Seguindo o modelo de pesquisa gerativa – Princípios e Parâmetros –, são levantadas as estratégias de construção das orações padrão e não-padrão, sendo estas classificadas em Relativas Cortadoras e Relativas Copiadoras. Os resultados atestam que a construção não-padrão é utilizada em 69,33% dos casos, sendo 67,00% de Relativa Cortadora e 2,33% de Relativa Copiadora, enquanto que a estratégia padrão é empregada em 30,67% (trinta e três por cento). No uso da estratégia padrão, o emprego do pronome relativo está garantido, sendo resultado de movimento do elemento QU, com fixação de parâmetro [+movQU]; e no emprego das estratégias não-padrão a tendência é o uso da partícula “que”, denominada de “juntor”, correlacionada com o fato de que as orações subordinadas são regidas à principal por meio da conjunção. Neste último caso, QU não resulta de movimento [-movQU], sendo gerado na posição de base e caracterizando que o Português Brasileiro (PB) é uma língua de parâmetro [±movQU]. / This work is a formal analysis of the relative clauses’ construction in prepositional sintagms in oral cult Portuguese from Porto Alegre, in which the preposition is not visible in the phonetic form, in spite of the normative grammar requires it. Before accomplishing the analysis, we reminded the construction of the relative clauses, the relative pronouns with or without prepositions and some particularities and innovation of these constructions which are lighting up in BP, besides presenting the generative grammar view until the Principles and Parameters Model, singularizing the most relevant generative subjects about the construction of PP-Chopping. The analysis is based on data collected in 24 enquiries, corresponding to 24 informants registered in the corpus of the NURC project – Urban Cult Norma – which complete 300 periods of analysis. Following the model of generative research – Principles and Parameters –, the strategies standard – Pied-piping – and non-standard clauses´ construction are verified, and classificated in PP-Chopping and Resumptive Pronoun. The results show that the non-standard constructions are used in 69,33% of the cases, being 67,00% of PPChopping and 2,33% of Resumptive Pronouns, while the standard strategy is used in 30,67%. In the usage of the standard strategy, the use of the relative pronouns is assured, being a result of the element WH moviment, with the parameter fixing [+movWH]; while in the nonstandard strategies is tended the usage of “que”, called “juntor”, related to the fact that the subordinate clauses are governed to the main one by the conjuction. In this last case, WH does not result of movement [-movWH], being generated in the base position and characterizing that Brazilian Portuguese is a language of parameter [±movWH].

Este trabalho é uma análise formal da construção das orações relativas em contextos de sintagmas preposicionais no português oral culto de Porto Alegre em que a preposição não está visível na forma fonética, apesar de a gramática normativa exigi-la. Antes da realização da análise propriamente dita, relembramos a estrutura e a classificação das orações relativas, os pronomes relativos empregados com ou sem preposições e algumas particularidades e inovações dessas estruturas que vêm surgindo no PB, além de apresentar o panorama da gramática gerativa até o modelo de Princípios e Parâmetros, destacando as abordagens gerativas mais relevantes sobre a construção Relativa Cortadora. A análise baseia-se em dados coletados em 24 (vinte e quatro) inquéritos, que correspondem a 24 (vinte e quatro) informantes, registrados no corpus do projeto NURC – Norma Urbana Culta – que totalizam 300 (trezentos) períodos de análise. Seguindo o modelo de pesquisa gerativa – Princípios e Parâmetros –, são levantadas as estratégias de construção das orações padrão e não-padrão, sendo estas classificadas em Relativas Cortadoras e Relativas Copiadoras. Os resultados atestam que a construção não-padrão é utilizada em 69,33% dos casos, sendo 67,00% de Relativa Cortadora e 2,33% de Relativa Copiadora, enquanto que a estratégia padrão é empregada em 30,67% (trinta e três por cento). No uso da estratégia padrão, o emprego do pronome relativo está garantido, sendo resultado de movimento do elemento QU, com fixação de parâmetro [+movQU]; e no emprego das estratégias não-padrão a tendência é o uso da partícula “que”, denominada de “juntor”, correlacionada com o fato de que as orações subordinadas são regidas à principal por meio da conjunção. Neste último caso, QU não resulta de movimento [-movQU], sendo gerado na posição de base e caracterizando que o Português Brasileiro (PB) é uma língua de parâmetro [±movQU]. / This work is a formal analysis of the relative clauses’ construction in prepositional sintagms in oral cult Portuguese from Porto Alegre, in which the preposition is not visible in the phonetic form, in spite of the normative grammar requires it. Before accomplishing the analysis, we reminded the construction of the relative clauses, the relative pronouns with or without prepositions and some particularities and innovation of these constructions which are lighting up in BP, besides presenting the generative grammar view until the Principles and Parameters Model, singularizing the most relevant generative subjects about the construction of PP-Chopping. The analysis is based on data collected in 24 enquiries, corresponding to 24 informants registered in the corpus of the NURC project – Urban Cult Norma – which complete 300 periods of analysis. Following the model of generative research – Principles and Parameters –, the strategies standard – Pied-piping – and non-standard clauses´ construction are verified, and classificated in PP-Chopping and Resumptive Pronoun. The results show that the non-standard constructions are used in 69,33% of the cases, being 67,00% of PPChopping and 2,33% of Resumptive Pronouns, while the standard strategy is used in 30,67%. In the usage of the standard strategy, the use of the relative pronouns is assured, being a result of the element WH moviment, with the parameter fixing [+movWH]; while in the nonstandard strategies is tended the usage of “que”, called “juntor”, related to the fact that the subordinate clauses are governed to the main one by the conjuction. In this last case, WH does not result of movement [-movWH], being generated in the base position and characterizing that Brazilian Portuguese is a language of parameter [±movWH].

Este trabalho é uma análise formal da construção das orações relativas em contextos de sintagmas preposicionais no português oral culto de Porto Alegre em que a preposição não está visível na forma fonética, apesar de a gramática normativa exigi-la. Antes da realização da análise propriamente dita, relembramos a estrutura e a classificação das orações relativas, os pronomes relativos empregados com ou sem preposições e algumas particularidades e inovações dessas estruturas que vêm surgindo no PB, além de apresentar o panorama da gramática gerativa até o modelo de Princípios e Parâmetros, destacando as abordagens gerativas mais relevantes sobre a construção Relativa Cortadora. A análise baseia-se em dados coletados em 24 (vinte e quatro) inquéritos, que correspondem a 24 (vinte e quatro) informantes, registrados no corpus do projeto NURC – Norma Urbana Culta – que totalizam 300 (trezentos) períodos de análise. Seguindo o modelo de pesquisa gerativa – Princípios e Parâmetros –, são levantadas as estratégias de construção das orações padrão e não-padrão, sendo estas classificadas em Relativas Cortadoras e Relativas Copiadoras. Os resultados atestam que a construção não-padrão é utilizada em 69,33% dos casos, sendo 67,00% de Relativa Cortadora e 2,33% de Relativa Copiadora, enquanto que a estratégia padrão é empregada em 30,67% (trinta e três por cento). No uso da estratégia padrão, o emprego do pronome relativo está garantido, sendo resultado de movimento do elemento QU, com fixação de parâmetro [+movQU]; e no emprego das estratégias não-padrão a tendência é o uso da partícula “que”, denominada de “juntor”, correlacionada com o fato de que as orações subordinadas são regidas à principal por meio da conjunção. Neste último caso, QU não resulta de movimento [-movQU], sendo gerado na posição de base e caracterizando que o Português Brasileiro (PB) é uma língua de parâmetro [±movQU]. / This work is a formal analysis of the relative clauses’ construction in prepositional sintagms in oral cult Portuguese from Porto Alegre, in which the preposition is not visible in the phonetic form, in spite of the normative grammar requires it. Before accomplishing the analysis, we reminded the construction of the relative clauses, the relative pronouns with or without prepositions and some particularities and innovation of these constructions which are lighting up in BP, besides presenting the generative grammar view until the Principles and Parameters Model, singularizing the most relevant generative subjects about the construction of PP-Chopping. The analysis is based on data collected in 24 enquiries, corresponding to 24 informants registered in the corpus of the NURC project – Urban Cult Norma – which complete 300 periods of analysis. Following the model of generative research – Principles and Parameters –, the strategies standard – Pied-piping – and non-standard clauses´ construction are verified, and classificated in PP-Chopping and Resumptive Pronoun. The results show that the non-standard constructions are used in 69,33% of the cases, being 67,00% of PPChopping and 2,33% of Resumptive Pronouns, while the standard strategy is used in 30,67%. In the usage of the standard strategy, the use of the relative pronouns is assured, being a result of the element WH moviment, with the parameter fixing [+movWH]; while in the nonstandard strategies is tended the usage of “que”, called “juntor”, related to the fact that the subordinate clauses are governed to the main one by the conjuction. In this last case, WH does not result of movement [-movWH], being generated in the base position and characterizing that Brazilian Portuguese is a language of parameter [±movWH].