Дисертації з теми "System of natural"
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1
Yang, Chin-mu. "A natural modal system." Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357300.
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2
Hanson, John Douglas. "UGURU : a natural language Unix consultant /." Online version of thesis, 1987. http://hdl.handle.net/1850/10133.
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3
Arumugam, Gnana Shekaran. "ALTERNATE MODELS FOR NATURAL GAS TRANSPORTATION SYSTEM PERFORMANCE OPTIMIZATION." UKnowledge, 2015. http://uknowledge.uky.edu/ms_etds/7.
Повний текст джерелаАнотація:
The Natural Gas market in the U.S is growing rapidly with evidence that the nation has enough shale reserves to power the country for the next century. To ensure continued economic benefits through the use of this environmentally desired energy source, it becomes important to optimize the transportation network system design. Transportation through pipelines is one of the most common methods used to distribute Natural Gas from source to destination. This transportation system, consisting of pipelines, compressors and other supporting equipment, must be optimized, considering all relevant parameters to minimize cost and increase profit. The research presented here improves on the fuel cost minimization models in literature to incorporate pipeline elevation and safety requirements. A new model is proposed to consider the entire transportation network as a single system and optimize it considering all relevant parameters. The optimization model is setup as a mixed integer nonlinear program. The proposed model is used to optimize the pipeline network for a case study, evaluate the model as well as investigate design capacity and installed capacity of pipeline network.
4
Bustos-Serrano, Hector. "The Carbonate System in Natural Waters." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/493.
Повний текст джерелаАнотація:
Reliable measurements of the thermodynamics of the carbonate system are needed to better understand the CO2 system in natural waters. New measurements of the carbonic acid pK1* and pK2* in seawater have been made over a wide range of temperatures (1 to 50°C) and salinities. The commonly used CO2 constants of Mehrbach et al., (1973) were limited to salinities (19 to 43) and temperatures (2 to 35°C). They cannot be used to study estuarine or fresh waters. The results of these measured pK1* and pK2* values are in good agreement with those determined using the Miami Pitzer equations (Millero and Pierrot, 1998). The results in this dissertation can be demonstrates the validity of the model that can be used to study the carbonate system in most natural waters. The so called Miami model is presently being used to examine the effect of ocean acidification on natural waters. The boric acid effect on the dissociation constants in seawater and NaCl solutions was tested. The addition of boric acid has little or no effect on pK1* values. However, the values of pK2*, decreases with the addition of small amounts of boric acid to ASW in agreement with the work of Mojica-Prieto and Millero, (2002). The addition of larger concentrations of boric acid cause the values of pK2* to increase. These effects have been attributed to the interactions of boric acid with the carbonate ion (CO32-) in seawater (Mojica-Prieto and Millero, 2002). The addition of boric acid to NaCl solutions in contrast, caused the values of pK1* and pK2* to decrease. This has been attributed to the interactions of borate ions with Mg2+ and Ca2+ in seawater. Further measurements in Na-Mg-Cl and Na-Ca-Cl solutions are needed to prove that this is the case. The boric acid effect on the carbonate constants indicate that an increase in boric acid has no affect on pK1*, but does change the values of pK2*. At low concentrations of boric acid, pK*2 decreases, and at higher concentrations it increases. These results indicate that boric acid has some ionic interactions with the carbonate ion. Similar studies in NaCl indicate that both pK1* and pK2* decrease when boric acid is added. The differences between seawater and NaCl may be related to the interactions of Mg2+ and Ca2+ with borate anions. Further studies of NaCl with additions of MgCl2 and CaCl2 are needed to examine the effects in detail. Preliminary studies on the effect of DOC on the carbonate constants are not definitive. The change of the DOC concentration from 50 to 100 µmol kg-1 has little effect on the values of pK1* and pK2*. Dilutions of seawater with artificial seawater are complicated by changes in the concentration of boric acid. Earlier studies indicated that DOC may cause the 8 mu-mol kg-1 increase in total alkalinity of seawater needed to balance the thermodynamics of the system (Millero et al., 2002). This may be partially due to the new values for the B/Cl ratio in seawater found by Lee et al., (2010) that increases the TA by ~ 6 µmol kg-1. Further studies are needed to examine the effect of humic compounds in estuarine waters on the carbonate system. Measurements of pH or pCO2 along with TA and TCO2 can be used to separate the effect of organic ligands on TA. If DOC measurements are also made, one can relate the effect to organic ligands that can accept a proton. The cruises in the Little Bahama Banks show for the first time the active precipitation of CaCO3 (Bustos-Serrano et al., 2009). This causes measured decreases of TA, TCO2 and pH and increases in pCO2 in the whitings. This is in contrast to earlier studies on the Grand Bahama Banks where no active precipitation of CaCO3 was every found (Morse et al., 2003; Millero et al., 2005). The differences appear to be due to the movement of fresh saturated seawater from the Gulf Stream into the LBB. The Gulf Stream water enters the GBB in the winter, and the precipitation occurs on the suspended sediment over the year. Observations are needed on the Grand Bahama Banks in the winter and throughout the year to prove that this is the case.
5
Natali, Andrea. "Double Dyke System - Natural engineering solutions." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21243/.
Повний текст джерелаАнотація:
According to various studies, the effects of climate change will be a danger to ecosystems and the population, especially in coastal areas, increasing the risk of floods. Authorities are taking action to prevent future disasters using traditional engineering solutions. These solutions can have high environmental and economic costs, fixing the coastline, increasing the salinization of aquifers, and can be subject to failure mechanisms.
For this reason, studies were made to use natural engineering solutions for coastal protection, instead of traditional solutions, to achieve the UN SDGs. Coastal ecosystems have the natural ability to repair and restore themselves, increasing soil elevation, and attenuating waves. One of these solutions is the Double Dyke System, consisting of creating a salt marsh between the first dyke and a second inland. The goal is to protect the coasts and to restore ecosystems.
The purpose of this study is to compare the costs of natural engineering solutions with traditional ones. It is assumed that these solutions may be more effective and less expensive in the long run. For this evaluation, a suitability analysis of the polders in the Dutch Zeeland region to assess the costs and benefits under different SLR scenarios was made. A saline intrusion model was also created to analyze the effects of a salt marsh on the aquifers. From the analyzes conducted, the implementation of the DDS turns out to be the cheapest coastal defense system in all SLR scenarios. The presence of a salt marsh could also have a positive impact on the prevention of saline intrusion in the various scenarios considered.
The DDS could have a positive economic and environmental impact in the long term, reducing the investment costs for coastal defense and bringing important benefits for the protection of man and nature.
Despite the results, more studies are needed on the efficiency of this defense system and on the economic evaluation of non-marketable ecosystem services.
6
Williams, Clive Richard. "ATLAS : a natural language understanding system." Thesis, University of Bristol, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320139.
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7
Bhala, Maclean J. "Non-migratory antiozonant system for natural rubber." Thesis, Loughborough University, 1997. https://dspace.lboro.ac.uk/2134/12428.
Повний текст джерелаАнотація:
The current research on non-migratory antiozonant systems for natural rubber follows a tripartite study involving the formulation of a coating compound with static and dynamic ozone testing of the coatings, a review of some commercial in-mould coating techniques and analysis of diffusion of a commercial antiozonant through a coating. An outline of the mixing of Nipol 1312, a low molecular weight nitrile butadiene rubber grade produced by leon Chemicals Inc., with other ingredients to produce a coating composition is also given. Test pieces of the natural rubber substrate were placed in pre-coated mould cavities and cured under compression to achieve covulcanisation between the substrate and the coating. All ozone tests were carried out under standard ASTM DI149-911D518-91 conditions. Results show that the formulated nitrile rubber coating compound is able to protect natural rubber from ozone attack with no migration of the antiozonant as in classical chemical antiozonant systems. An up to date patent search on in-mould coating techniques and systems was carried out and evaluated in conjunction with some current commercial coating methods. In this overview, more emphasis is laid on the nature of the coating material which subsequently determines the appropriate coating technique, than on the specific in-mould coating process applied. Post-mould coating work with polyvinyl chloride (PVC) on natural rubber substrate was also assessed. An experimental and theoretical study of the diffusion of the antiozonant N,Isopropyl N-phenyl-pphenylenediamine (IPPD) through a protective coating on a natural rubber substrate is made in the project. This study shows that the protective coating is able to reduce the loss of antiozonant through diffusion while giving the rubber adequate protection from ozone. The study also demonstrates that the combination of a commercial antiozonant and a protective coating gives enhanced product service life and provides protection to damaged regions of the coating.
8
White, Steven John. "A portable natural language database query system." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25066.
Повний текст джерелаАнотація:
With the increased use of computerized databases, the ability to allow users to access information using natural language is becoming more desirable. There are many natural language systems in existence today. The main problem with these systems is the amount of expertise and effort required to adapt them to a new domain.
The design of a portable natural language front-end to a relational database is described in this thesis. It is designed so that a typical Database Administrator can implement a new domain in a reasonable amount of time. Database portability has been achieved by separating the domain dependent natural language definitions from the domain independent definitions. These domain dependent definitions are specified in the database schema, which is structured to extract the semantics contained in the structure of the actual database. A rich supply of standard definitions are available to both aid in the development of the database schema and to help force consistency amongst database domains.Science, Faculty of
Computer Science, Department of
Graduate
9
Konrad, Karsten. "Model generation for natural language interpretation and analysis /." Berlin [u.a.] : Springer, 2004. http://www.loc.gov/catdir/enhancements/fy0818/2004042936-d.html.
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10
Strömbom, Johannes. "Natural Fingerprinting of Steel." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-85531.
Повний текст джерелаАнотація:
A cornerstone in the industry's ongoing digital revolution, which is sometimes referred to as Industry 4.0, is the ability to trace products not only within the own production line but also throughout the remaining lifetime of the products. Traditionally, this is done by labeling products with, for instance, bar codes or radio-frequency identification (RFID) tags. In recent years, using the structure of the product itself as a unique identifier, a "fingerprint", has become a popular area of research. The purpose of this work was to develop software for an identification system using laser speckles as a unique identifier of steel components. Laser speckles, or simply speckles, are generated by illuminating a rough surface with coherent light, typically laser light. As the light is reflected, the granular pattern known as speckles can be seen by an observer. The complex nature of a speckle pattern together with its sensitivity to changes in the setup makes it robust against false-positive identifications and almost impossible to counterfeit. Because of this, speckles are suitable to be used as unique identifiers. In this work, three different identification algorithms have been tested in both simulations and experiments. The tested algorithms included one correlation-based, one method based on local feature extraction, and one method based on global feature extraction. The results showed that the correlation-based identification is most robust against speckle decorrelation, i.e changes in the speckle pattern, while being quite computationally expensive. The local feature-based method was shown to be unfit for this current application due to its sensitivity to speckle decorrelation and erroneous results. The global feature extraction method achieved high accuracy and fast computational speed when combined with a clustering method based on overlapping speckle patterns and a k-nearest neighbours (k-NN) search. In all the investigated methods, parallel calculations can be utilized to increase the computational speed.
11
Reddy, Peter C. "Radar target classification by natural resonances system analysis /." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA241170.
Повний текст джерелаАнотація:
Thesis (M.S. in Systems Engineering (Electronic Warfare))--Naval Postgraduate School, September 1990.Thesis Advisor(s): Morgan, Michael A. Second Reader: Knorr, Jeffery B. "September 1990." Description based on title screen as viewed on December 17, 2009. DTIC Descriptor(s): Radar Targets, Algorithms, Theses, Electromagnetic Scattering, Radar, Annihilation Reactions, Resonance, Classification, Systems Analysis, Filters, Noise, Excitation, Scattering, Water Pollution. DTIC Identifier(s): Pole Extraction, Annihilation Filters. Author(s) subject terms: Natural Resonances, Noncooperative Target Recognition, K-Pulse, Pole Extraction, Cadzow-Solomon. Includes bibliographical references (p. 131-133). Also available in print.
12
Copeck, Terry (Frank Terrence) Carleton University Dissertation Computer Science. "A decompositional semantic system for natural language apprehension." Ottawa, 1989.
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13
Yamani, Ahmed A. S. "An intelligent question : answering system for natural language." Thesis, University of Greenwich, 1998. http://gala.gre.ac.uk/8253/.
Повний текст джерелаАнотація:
As applications of information storage and retrieval systems are becoming more widespread, there is an increased need to be able to communicate with these systems in a natural way. Natural Language applications in the 1990s, as well as in the foreseeable future, have more demanding requirements. Current Natural Language Processing approaches alone have proven to be insufficient as they lack to obtain linguistic understanding. A more suitable approach would be to adopt Computational Linguistics theories, such as the Lexical-Functional Grammar (LFG) theory complemented with Artificial Intelligence representation and processing techniques. A prototype Question-Answering System has been developed. It takes Natural Language parsed interrogatives, produces the Functional and Semantic structures according to the LFG representation. It compares the functional behaviour of verbs and their linguistic associations in a given query with a general Object Model in that specific domain. It will then attempt to deduce more information from the given processed text and represent it for possible queries. The structural rules of the LFG and the deduced common-sense domain specific information resolve most of the common ambiguities found in Natural Languages and enhance the understanding ability of the proposed prototype. The LFG theory has been adopted and extended: (i) to examine the constituents of the theoretical, syntactic and semantic of Arabic interrogatives, an area which has not been thoroughly investigated, (ii) to represent the Functional and Semantic Structures of the Arabic interrogatives, (iii) to overcome the word-order problem associated with some Natural languages such as Arabic, (iv) to add understanding capabilities by capturing the common-sense domain specific knowledge within a specific domain.
14
Davidson, Jacob B. "Natural History and Breeding System of Maguire Primrose." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/696.
Повний текст джерелаАнотація:
The goal of this thesis was to examine the breeding system and natural history of the Maguire primrose (Primula cusickiana var. maguirei). Maguire primrose is an endemic, threatened subspecies found only along a narrow corridor within Logan Canyon in northern Utah, USA. This plant displays distinct flower distyly, with clear distinction of pin and thrum morphologies (morphs). The timing of Maguire primrose flower blooms was disparate between upper and lower canyon populations, and the flowers experienced cool temperatures occasionally. I captured eight different species of flying insects visiting Maguire primrose flowers, and made 67 observations of insect visitation. Inter-morph outcrossing hand pollinations were the most successful hand pollinations performed, but were usually not as successful as those that were naturally pollinated. Selfing rates were quite low compared to outcrossing reproductive scenarios. Morph-specific fecundity differences were detected in my hand pollinations, but not in the naturally pollinated maternal plants. I did not observe clear fecundity differences based on the canyon location of Maguire primrose.
15
Thanguturi, Naren. "Automatic News Generation System based on Natural Language." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1525973404437239.
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16
Zhu, Shuxiang. "Big Data System to Support Natural Disaster Analysis." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1592404690195316.
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17
Presland, S. G. "The analysis of natural language requirements documents." Thesis, University of Liverpool, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383444.
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18
Simango, D. G. "Simulation of natural ventilation for livestock structures." Thesis, University of Aberdeen, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293987.
Повний текст джерелаАнотація:
Pig production in Malawi and in most of the developing countries is shifting increasingly from pasture or dirt lot to total confinement with improved housing facilities. Keeping pig level temperatures within the comfort zone in hot weather is a common problem in naturally ventilated intensive pig buildings. Automatically controlled natural ventilation (ACNV) has proved to be effective in reducing the problem of heat build up in pig houses and is becoming very popular. However, a method for reducing summer temperatures at animal level in non-automated naturally ventilated intensive pig buildings has not been developed. An attempt was made to develop a natural ventilation system which would maximise the cooling effect of wind at animal level by manual control in buildings suitable for the Tropics. The research project was conducted in three stages: (1) air flow pattern studies, using 1:20 scale two-dimensional models, (2) wind tunnel testing, using three-dimensional, 1:20 scale models with simulated pigs, and (3) validation of results from the wind tunnel studies made with a 1:4 scale model, put out in the field. Air deflectors were used as a means of increasing the effect of wind on the ventilation pattern in the models. Monopitch, duopitch and offest gable models were tested in the water table, and monopitch models were tested in the wind tunnel. The use of air deflectors in monopitch and offset gable models showed a marked increase in airflow towards the animal zone area and a reduction in the difference between the surface temperature of the model pigs and the outside air temperatures. The deflectors improved the performance of the models by about 10% with the front orientation and about 20% with the rear orientation. In the duopitch model an increase in the roof overhang improved flow circulation on the leeward side. The use of air deflectors also improved flow circulation on the leeward side. The wind speed and air temperature at the experimental site for the 1:4 scale model were used to validate the results from the wind tunnel tests. The measured temperature values showed similar response curves to the predicted values. Temperature differentials increased with an increase in the angle of the deflector.
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Rahiman, Farzana. "The effects of artificial and natural sweeteners on various physiological systems." Thesis, University of the Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_5279_1319022790.
Повний текст джерелаАнотація:
This study aimed to investigate the effects of commercially available natural (sugar cane molasses, white sugar and brown sugar) and artificial (Canderelâ¢, Equalâ¢, Natreenâ¢, Sweetexâ¢, Splenda⢠and Swheetâ¢) sweeteners on various physiological systems. The artificial sweeteners tested in this study may be categorised into their respective groups based on their primary ingredient. The brands Canderel⢠and Equal⢠contain aspartame, Natreen⢠and Sweetex⢠consist of saccharin and Splenda⢠and Swheet⢠are composed of sucralose. The inclusion of artificial or natural sweeteners in the human diet has been continually debated and their implication in the development of certain diseases has raised concern regarding their safe use. Therefore, it is necessary that these food products be subjected to a battery of tests to determine adverse effects on human health.
20
Manresa, Yee Cristina Suemay. "Advanced and natural interaction system for motion-impaired users." Doctoral thesis, Universitat de les Illes Balears, 2009. http://hdl.handle.net/10803/9412.
Повний текст джерелаАнотація:
Human-computer interaction is an important area that searches for better and more comfortable systems to promote communication between humans and machines. Vision-based interfaces can offer a more natural and appealing way of communication. Moreover, it can help in the e-accessibility component of the e-inclusion. The aim is to develop a usable system, that is, the end-user must consider the use of this device effective, efficient and satisfactory. The research's main contribution is SINA, a hands-free interface based on computer vision techniques for motion impaired users. This interface does not require the user to use his upper body limbs, as only nose motion is considered. Besides the technical aspect, user's satisfaction when using an interface is a critical issue. The approach that we have adopted is to integrate usability evaluation at relevant points of the software development.
21
Casanova, Martí Àngela. "Action of natural bioactive compounds on the enteroendocrine system." Doctoral thesis, Universitat Rovira i Virgili, 2017. http://hdl.handle.net/10803/460759.
Повний текст джерелаАнотація:
En els últims anys ha augmentat la presència de l’obesitat i de malalties associades a aquesta. En vista d’aquest fet, la cerca de teràpies preventives així com tractaments per aquestes malalties esdevé de gran interès per la salut publica. Les hormones intestinals secretades per les cèl•lules enteroendocrines juguen un paper clau en la regulació de la ingesta i la homeòstasis de la glucosa. En aquest marc, la recerca d’aquesta tesi doctoral s’ha centrat en l’acció dels compostos naturals bioactius sobre el sistema enteroendocrí.
En estudis previs, el nostre grup de recerca va observar que un extracte de proantocianidines del pinyol del raïm (GSPE) augmentava els nivells plasmàtics de GLP-1 en rates. En aquesta tesi doctoral, s’ha esbrinat que aquest augment podria ser en part explicat per l’acció directa del GSPE sobre les cèl•lules enteroendocrines. D’altra banda, s’ha demostrat que l’acció directa del GSPE també modula la secreció de les principals hormones intestinals, induint un augment de la secreció de GIP i PYY, així com una reducció de la secreció de CCK.
Els resultats obtinguts en el cultiu d’organoids han demostrat que el GSPE incrementa els principals marcadors de les cèl•lules L i modula els factors de transcripció involucrats en la diferenciació d’aquestes. Conseqüentment, aquests resultats senyalen que promoure la diferenciació de les cèl•lules L és un mecanisme d’acció del GSPE en tractament prolongats. D’altra banda, la recerca realitzada en tractaments subcrònics ha revelat que el GSPE modifica la composició de la biota intestinal i que el perfil microbià correlaciona amb els paràmetres metabòlics de l’hoste, del qual destaca la correlació amb els nivells plasmàtics incrementats de la hormona GLP-1 activa.
Altrament, s’ha trobat una nova font de compostos naturals bioactius, l’hidrolitzat de pota de pollastre, la qual s’ha demostrat que actua com un agent antihiperglicèmic en rates que presenten una homeòstasis de la glucosa alterada, degut a la capacitat d’inhibir l’activitat de DPP-IV i d’augmentar la secreció endògena de GLP-1.
En conclusió, els resultats obtinguts en aquesta tesi doctoral mostren que els compostos naturals bioactius actuen en el sistema enteroendocrí, per tant aquests podrien ser un agents terapèutics adequats per al tractament de la obesitat i la diabetes.En los últimos años ha aumentado la presencia de la obesidad y de enfermedades asociadas a ésta. Ante este hecho, la búsqueda de remedios preventivos, así como de tratamientos para estas enfermedades, se vuelve de gran interés para la salud pública. Las hormonas intestinales secretadas por las células enteroendocrinas juegan un papel en la regulación de la ingesta y la homeostasis de la glucosa. En este contexto, la investigación de esta tesis doctoral se ha centrado en la acción de los compuestos naturales bioactivos sobre el sistema enteroendocrino. En estudios previos, nuestro grupo de investigación observó que un extracto de proantocianidinas de hueso de uva (GSPE) aumentaba los niveles plasmáticos de GLP-1 en ratas. En esta tesis doctoral se ha descubierto que este aumento podría ser explicado en parte por la acción directa del GSPE sobre las células enteroendocrinas. Por otro lado, se ha demostrado que la acción directa del GSPE también modula la secreción de GIP y PYY, así como una reducción de la secreción de CCK. Los resultados obtenidos en el cultivo de organoides han demostrado que el GSPE aumenta los principales marcadores de las células L y modula los factores de transcripción involucrados en la diferenciación de éstas. Consecuentemente, estos resultados señalan que promover la diferenciación de las células L es un mecanismo de acción del GSPE en tratamientos prolongados. Por otro lado, la investigación realizada en tratamientos subcrónicos ha revelado que el GSPE modifica la composición de la microbiota intestinal y que el perfil microbiano correlaciona con los parámetros metabólicos del huésped, del cual destaca la correlación con los niveles plasmáticos aumentados de la hormona GLP-1 activa. Además, se ha encontrado una nueva fuente de compuestos naturales bioactivos, el hidrolizado de pata de pollo, el cual se ha demostrado que actúa como un agente antihiperglicémico en ratas que presentan una homeóstasis de la glucosa alterada, debido a la capacidad de inhibir la actividad de DPP-IV y de aumentar la secreción endógena de GLP-1. En conclusión, los resultados obtenidos en esta tesis doctoral muestran que los compuestos naturales bioactivos actúan en el sistema endocrino, con lo cual éstos podrían ser unos agentes terapéuticos adecuados para el tratamiento de la obesidad y diabetes.
In the last decade, there has been an increasing prevalence of obesity and metabolic-associated diseases. In view of this fact, finding preventive therapies, as well as treatments for these diseases is of great interest for public health. Gut hormones secreted from enteroendocrine cells (EECs) play a key role in the regulation of food intake and glucose homeostasis. In this context, the research of this thesis has focused on the role of natural bioactive compounds on the enteroendocrine system. Our research group reported in previous studies that grape seed proanthocyanidin extract (GSPE) increased GLP-1 plasma levels in rats. In this thesis, we elucidated that such increase might be in part explained by the direct action of GSPE on enteroendocrine cells. Moreover, we demonstrate that GSPE also modulates the secretion of the main gut hormones by directly acting on EECs, inducing an increase of GIP and PYY release, while reducing CCK release. The results obtained in this thesis using organoids culture demonstrated that GSPE up-regulate the main markers of L-cell and modulate transcription factors involved in L-cell differentiation, and thereby point out that the promotion of L-cell differentiation is a mechanism by which GSPE act in prolonged treatments. Moreover, our findings in mid-term treatments revealed that gut microbiota composition is modulated by GSPE and such microbial composition profile correlates with host metabolic parameters, and remarkably with increased active GLP-1 plasma levels. Furthermore, we found a new source of natural bioactive compounds, chicken leg hydrolyzate, and demonstrated that it acts as antihyperglycemic agent in disrupted-glucose homeostasis animals due to the capacity of inhibiting DPP-IV activity and enhancing endogenous GLP-1 release . In conclusion, the findings obtained in this thesis show that natural bioactive compounds act through different mechanisms on the enteroendocrine system, and thereby could be good therapeutic agents to treat obesity and glucose homeostasis disruption.
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McKinlay, Andrew. "A system for predicting sports results from natural language /." Leeds : University of Leeds, School of Computer Studies, 2008. http://www.comp.leeds.ac.uk/fyproj/reports/0708/McKinlay.pdf.
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23
Tadmor, Yoav. "Processing of natural images by the human visual system." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385855.
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Bridge, Derek G. "Computing presuppositions in an incremental natural language processing system." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315811.
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SANTOS, SIDNEY PEREIRA DOS. "LOGISTIC MANAGEMENT SYSTEM FOR NATURAL GAS TRANSPORTATION BY PIPELINE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2008. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=11900@1.
Повний текст джерелаАнотація:
Uma gestão eficaz da cadeia de negócio do gás natural com
logística de transporte por gasodutos, considerando os
principais agentes, como Carregador, Produtor, Transportador
e Distribuidor, requer a utilização de tecnologia de
informação e sistemas de suporte à decisão. Este trabalho
apresenta um Sistema de Gestão de Logística de Transporte de
Gás Natural por Gasodutos - SGLT, composto de módulos ou
subsistemas integrados que propiciam maximizar a
comercialização do gás natural e mitigar a ocorrência de
perdas de receitas e multas contratuais devido a
contingências que podem gerar falha de entrega do
gás natural ao Distribuidor. Permite também avaliar o nível
ótimo econômico de confiabilidade que deve ser mantido pelo
Transportador, através da implantação de redundâncias, para
mitigar sua exposição aos riscos de perdas de receitas e
multas contratuais por parte dos agentes envolvidos na
cadeia do negócio de gás natural. O sistema proposto é
fundamentado na simulação Monte Carlo de falhas
de equipamentos da malha de gasodutos de transporte e de
restrições de oferta e demanda de gás natural, bem como os
fechamentos acidentais de válvulas de
bloqueio de gasodutos e de falhas nos pontos de entrega de
gás natural de modo a quantificar seus impactos na Cadeia do
Negócio do Gás Natural. O sistema proposto é constituído de
(i) um Sistema de Informação Geográfico - SIG, (ii)
um modelo de dados de gasodutos (Arc Pipeline Data Model -
APDM), (iii) um simulador termo-hidráulico de escoamento de
gás por dutos em regime permanente e transiente - Pipeline
Studio 3.0, (iv) uma base de dados dos resultados das
simulações termohidráulicas, (v) um modelo de simulação
Monte Carlo para avaliação da confiabilidade do sistema de
transporte utilizando o software @Risk 4.5, (vi) um modelo
econômico com simulação Monte Carlo utilizando o software
@Risk 4.5 e (vii) um otimizador, baseado em programação
linear, para maximização da comercialização de gás e para
minimização de perdas de receitas e multas contratuais
devido a cortes de fornecimento de gás decorrentes de
situações contingenciais. Este trabalho permitiu
identificar, quantificar e justificar economicamente a
implantação de unidades compressoras reservas nas estações
de compressão do Gasoduto Bolívia-Brasil, e aumentar a
disponibilidade do sistema de compressão, reduzindo
acentuadamente a exposição do Transportador a perdas de
receita e penalidades contratuais por redução de capacidade
de transporte decorrentes da entrada em manutenção de
unidades compressoras e de falhas não-programadas de tais
equipamentos. Foram também identificadas e quantificadas as
falhas de válvulas de bloqueio de gasoduto e das estações de
entrega de gás, não cabendo, nestes casos, a
implantação de redundância.An efficient management of the natural gas business chain, based on pipeline transmission network and taking into consideration the interaction between the main players such as Shippers, Suppliers, Transmission Companies and Local Distribution Companies, requires the use of information technology and decision-making support systems. This work presents a Natural Gas Logistic Transportation Management System, composed of integrated modules or subsystems that allow maximizing natural gas commercialization and allow mitigating revenue losses and contractual penalties due to contingencies that may cause failures in gas delivery to Local Distribution Companies. The proposed system also allow evaluating the optimum economic level of availability to be maintained by the Transmission Company by using stand-by equipment to mitigate its risk exposures to revenue losses and contractual penalties from the agents of the natural gas chain. The proposed system is based on Monte Carlo simulation of equipment failures of the gas transmission network, on the supply/delivery unexpected shortfalls, unexpected block valves closing and failures on the city-gates in order to quantify their impact on the natural gas business chain. The proposed system is made of (i) a geographic information system - GIS, (ii) a pipeline data model (Arc Pipeline Data Model - APDM), (iii) a gas pipeline thermo-hydraulic simulation for steady and transient states - Pipeline Studio 3.0, (iv) a data base of thermohydraulic simulation results and (v) a Monte Carlo simulation model to evaluate the reliability of the transmission system by using @Risk 4.5 and (vi) an economic model with Monte Carlo simulation using @Risk 4.5 and (vii) an optimizer, based on linear programming, for gas commercialization maximization and minimization of revenue losses and contractual penalties for not delivering the gas volumes at the contracted level. This work has identified, quantified and proved feasible the installation of stand-by compressor units at the Bolivia-Brail Gas Pipeline compressor stations and therefore improved the transmission system availability. As a direct benefit has reduced the Transmission Company risk exposure to revenue losses and contractual penalties due to reduction of pipeline transmission capacity as consequence of compressor units scheduled and nonscheduled outages. Failures of pipeline block valves and city-gates have also been identified and quantified but redundancy improvements were not required.
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Koch, Katherine E. (Katherine Elizabeth) 1979. "Situating a natural language system in a multimodal environment." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/86673.
Повний текст джерелаАнотація:
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.Includes bibliographical references (leaf 31).
by Katherine E. Koch.
M.Eng.
27
Hassan, Hana Abbas. "GQuery - a natural language query system for geological databases." Thesis, University of Sussex, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236234.
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Augustsson, Christopher. "Multipurpose Case-Based Reasoning System, Using Natural Language Processing." Thesis, Linnéuniversitetet, Institutionen för datavetenskap och medieteknik (DM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-104890.
Повний текст джерелаАнотація:
Working as a field technician of any sort can many times be a challenging task. Often you find yourself alone, with a machine you have limited knowledge about, and the only support you have are the user manuals. As a result, it is not uncommon for companies to aid the technicians with a knowledge base that often revolves around some share point. But, unfortunately, the share points quickly get cluttered with too much information that leaves the user overwhelmed. Case-based reasoning (CBR), a form of problem-solving technology, uses previous cases to help users solve new problems they encounter, which could benefit the field technician. But for a CBR system to work with a wide variety of machines, the system must have a dynamic nature and handle multiple data types. By developing a prototype focusing on case retrieval, based on .Net core and MySql, this report sets the foundation for a highly dynamic CBR system that uses natural language processing to map case attributes during case retrieval. In addition, using datasets from UCI and Kaggle, the system's accuracy is validated, and by using a dataset created explicitly for this report, the system manifest to be robust.
29
Chen, Yuhua. "An automatic storytelling system based on natural language processing." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-447027.
Повний текст джерелаАнотація:
With the rapid development of science and technology, high technology tools have been widely used in educational field. Recent studies reported thatintelligent social robots are being widely used in early childhood education. Artificialintelligence technology is playing a crucial role in the application of robots. Storytelling is one of the functions where robots serve as learning companions. Automatic storytelling is a challenging text generation task since it requires generating long,coherent natural language to describe a sensible sequence of events.This project aims to build an automatic system that can tell a story based on givensentences, and the performance of the system needs to be evaluated and the output should be evaluated how well they can be perceived by humans. The system consists of two main components: keyword extraction module and story generation module.The keyword extraction module is designed to extract keywords from the input storyand generate a corpus. The thesis choose to use topic model to extract the keywordsof each story. The storytelling generator module should be able to automatically generate pieces of the story with a coherent natural language based on the sequence of given events. We build the generation module based on the pre-trained model,GPT-2. According to evaluation results, the system performs well and have shown that the stories generated from our system can be well perceived by humans. Keywords: natural language processing, storytelling, keyword extraction, text generation
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Martins, Gonçalo dos Santos. "Kinect - Innovative Face Recognition System." Dissertação, 2013. https://repositorio-aberto.up.pt/handle/10216/68885.
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31
Almeida, Rafael Borges de. "Backend for a Ticketing System." Dissertação, 2018. https://hdl.handle.net/10216/116632.
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32
Huang, Jung-Te, and 黃榮德. "Intelligent Natural Light Illumination System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/52174949721925928405.
Повний текст джерелаАнотація:
碩士國立臺灣科技大學
電子工程系
103
Sunlight is one of the important elements for creatures' survival and growth. Due to the change of lifestyle, people spend about 90 \% of time staying in buildings. In this situation, the artificial indoor illumination gradually replaces the sunlight in human beings' life. This condition may lead to exhaustion, osteoporosis, depression, inability of concentration, and other symptoms if people cannot be exposed to enough sunlight. To solve this problem, this dissertation proposes an Intelligent Natural Light Illumination System. This illumination system can take people's health and environmental protection into account. This system can divide into four parts: Light Collecting, Light Transmitting, Light Emitting, and Auxiliary Lighting. When the sunlight is enough, the lighting system can guide the sunlight into the building for lighting applications. The auxiliary lighting subsystem would control the LED to satisfy the users' demand when the brightness of the environment could not achieve the desired results. After that, it can let the sunlight indoors and improve the quality of human's life at the same time.
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Tzou, Guey Shyan, and 鄒貴賢. "Natural Zooming System of HDTV." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/26373218976896441288.
Повний текст джерелаАнотація:
碩士中原大學
電機工程研究所
82
Throught data compression of HDTV technology has been perfectly developed recently,yet an effective solution to image conversion is still not deviced. In the past, the so-called linear interpolation by filter device was often utilized. Since the the cost of memory device is dropped, the digital signal processing has been in leading place of all conversion techniques. For the image-size conversion, the popular skills are Zero order and Bilinear methods. Because they tends to increase high frequency error in conversion, therefore distortion follows. The theme of this thesis is to derive a Super Pulse Code Modulation for Vedio Singal (the VSPCM method). By this method, a large portion of additive high frequency errors can be reduced. The main part of VSPCM method is called natural zooming system. First , any 2-D image singal must be mapped to a series data.Later, each three pixels can be assumed as to be an Abstract region with convex shape. After that, each of this region will be abstracted to generate a vector parameter. According to a vector's parameter, the analog singal can be regenerated by the regenerator. And finally,a piece of smooth zooming image can be created by resampling. In the future, It could be perfectly made by connecting with different TV singal systems when this result is transplanted on VLSI chips.Therefore it is very flexible to communiate with various TV standards.The barrier of standardization will be no longer existed.
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Gonçalves, Gonçalo Filipe Loureiro de Campos. "Mobile Ad Hoc Network Naming System." Dissertação, 2017. https://repositorio-aberto.up.pt/handle/10216/110600.
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Moreira, Luís Miguel Couto. "Mobile and Web Recommender System for Shopping." Dissertação, 2015. https://repositorio-aberto.up.pt/handle/10216/82381.
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Oliveira, Ricardo Jorge Mendes. "Recommender System for an e-learning platform." Dissertação, 2016. https://repositorio-aberto.up.pt/handle/10216/103777.
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Barroso, Luís Miguel Salgueiro. "Porting Wireless Mesh Networks to the Android System." Dissertação, 2016. https://repositorio-aberto.up.pt/handle/10216/105561.
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Wu, Sheng-Ju, and 吳昇儒. "Gaze Tracking System with Natural Light." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/5my5m8.
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Martins, Gonçalo dos Santos. "Kinect - Innovative Face Recognition System." Master's thesis, 2013. https://repositorio-aberto.up.pt/handle/10216/68885.
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40
Almeida, Rafael Borges de. "Backend for a Ticketing System." Master's thesis, 2018. https://hdl.handle.net/10216/116632.
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41
Silva, Pedro Filipe Barros. "Development of a System for Automatic Plant Species Recognition." Dissertação, 2013. https://repositorio-aberto.up.pt/handle/10216/67734.
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Pinho, Vítor Manuel Guedes de Oliveira. "OrchRecon A Distributed System for Reconnaissance and Vulnerability Scanning." Dissertação, 2020. https://hdl.handle.net/10216/132036.
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Barbosa, Mário Dinis da Silva e. "JBriareos: A Secure and Scalable Distributed Intrusion Detection System." Dissertação, 2020. https://hdl.handle.net/10216/131956.
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44
Wang, Yu-Hsiang, and 王育祥. "Temporary Shelter System Design of Natural Disaster Management Information System." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/61430627184055289256.
Повний текст джерелаАнотація:
碩士國防大學理工學院
資訊工程碩士班
102
In recent years, global climate becomes abnormally, there are many major natural disaster events occur every year. Because of the geographical position, Taiwan has been threatened by natural disaster for a long time. The victims are often on the dramatic increase after the large-scale disaster events happened, causing the large number of victim live residential instability. Therefore, the demand of shelter will keep increasing. In order to simplify the complicated relief mission and effectively integrate the information of disaster, building information management platform of relief is necessary. Moreover, there are numerous disaster management platforms in existence and they solve the most of disasters and humanitarian issues. After analyze the regulations that drafted by the government, the research discovers the existing platform is still inadequate for the shelter. Therefore, the paper collected the opening process of shelters that drafted by the government, and integrate the main works. By using Use Case to describe the interaction between the system and the user. Then using Unified Modeling Language to present the system design, the design results will be used as the basis for system implementation. Developer will be able to understand the operating procedures of shelters through the blueprints design. So, the system platform will comply with government laws and regulations.
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Gonçalves, Gonçalo Filipe Loureiro de Campos. "Mobile Ad Hoc Network Naming System." Master's thesis, 2017. https://repositorio-aberto.up.pt/handle/10216/110600.
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Guimarães, Nuno Ricardo Pinheiro da Silva. "Lexicon Expansion System for Domain and Time Oriented Sentiment Analysis." Dissertação, 2016. https://repositorio-aberto.up.pt/handle/10216/91012.
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Silva, André Guimarães Rodrigues da. "Exploiting business knowledge in a recommender system for handset devices." Dissertação, 2019. https://hdl.handle.net/10216/124665.
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Silva, André Guimarães Rodrigues da. "Exploiting business knowledge in a recommender system for handset devices." Master's thesis, 2019. https://hdl.handle.net/10216/124665.
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Reisinho, José Querubim Rocha. "Medical images analysis using Deep Learning - A skin cancer screening system." Dissertação, 2019. https://hdl.handle.net/10216/123727.
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Pimentel, Mariana de Leão Pinheiro Gonçalves. "Genetic variants associated with aggressive behaviour in humans: the serotonergic system." Dissertação, 2020. https://hdl.handle.net/10216/132064.
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