1000 resultados para Gama Quase-Inteira Generalizada


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Believed by some authorities to be the work of Alvaro Velho.

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As tributações autónomas encontram-se perfeitamente integradas no sistema fiscal português, sendo, hoje aceites de forma quase generalizada como necessárias à prossecução de objetivos de justiça fiscal, ao mesmo tempo que cumprem uma importante função no domínio da obtenção de receita fiscal. Ao longo dos anos as opções legislativas têm conduzido a sucessivos alargamentos da sua base tributável e ao agravamento das taxas, o que comprova a sua consolidação no nosso sistema fiscal. Considerando a incidência sobre determinados encargos e despesas dos sujeitos passivos, visam desincentivá-los de as praticar, sendo que são bastante mais gravosas relativamente às pessoas coletivas do que às pessoas singulares. O seu peso no total das receitas fiscais não é muito significativo, mas, num momento em que o Esta-do precisa de incrementar as suas receitas fiscais para garantir a sustentabilidade das finanças públicas, as tributações autónomas são muito relevantes na prossecução desse objetivo. Apesar de estarem diretamente ligadas aos impostos diretos, as tributações autónomas aproximam-se mais dos impostos indiretos pois incidem sobre a despesa e o consumo e não sobre o rendimento dos sujeitos passivos.

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In this dissertation, are presented two microstrip antennas and two arrays for applications in wireless communication systems multiband. Initially, we studied an antenna and a linear array consisting of two elements identical to the patch antenna isolated. The shape of the patch used in both structures is based on fractal geometry and has multiband behavior. Next a new antenna is analyzed and a new array such as initial structure, but with the truncated ground plane, in order to obtain better bandwidths and return loss. For feeding the structures, we used microstrip transmission line. In the design of planar structures, was used HFSS software for the simulation. Next were built and measures electromagnetic parameters such as input impedance and return loss, using vector network analyzer in the telecommunications laboratory of Federal University of Rio Grande do Norte. The experimental results were compared with the simulated and showed improved return loss for the first array and also appeared a fourth band and increased directivity compared with the isolated antenna. The first two benefits are not commonly found in the literature. For structures with a truncated ground planes, the technique improved impedance matching, bandwidth and return loss when compared to the initial structure with filled ground planes. Moreover, these structures exhibited a better distribution of frequency, facilitating the adjustment of frequencies. Thus, it is expected that the planar structures presented in this study, particularly arrays may be suitable for specific applications in wireless communication systems when frequency multiband and wideband transmission signals are required.

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The past years have seen a great interest in the use of frequency selective surfaces (FSS), as spatial filters, in many microwave applications. Among these, we highlight applications in telecommunication systems (such as satellite communications and radar), high gain antennas (combined with planar antennas) and (home and industrial) microwave ovens. The FSS is usually composed of two-dimensional periodic arrays, with equally spaced elements, which may be metallic patches (printed on dielectric substrates) or aperture (holes in thin metal surfaces). Using periodic arrays, the FSS have been able to meet the demands of the telecommunications industry. However, new demands are finding technological limitations. In this context, adverse filtering requirements have forced designers to use FSS optimization methods to find specific formats of FSS elements. Another alternative that has been used to increase the selectivity of the FSS is the cascaded FSS, a simple technique that has as main drawback the increased dimensions of the structure, as well as its weight. This work proposes the development of a new class of selective surfaces frequency (FSS) composed of quasi-periodic (or non-periodic) arrangements. The proposed FSS have no array periodicity, in relation with the spatial position of their elements. The frequency responses of these structures were simulated using commercial softwares that implement full-wave methods. For the purpose of validation of this study, FSS prototypes were built and measured, being possible to observe a good agreement between simulated and measured results. The main conclusions of this work are presented, as well as suggestions for future works.

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The content-based image retrieval is important for various purposes like disease diagnoses from computerized tomography, for example. The relevance, social and economic of image retrieval systems has created the necessity of its improvement. Within this context, the content-based image retrieval systems are composed of two stages, the feature extraction and similarity measurement. The stage of similarity is still a challenge due to the wide variety of similarity measurement functions, which can be combined with the different techniques present in the recovery process and return results that aren’t always the most satisfactory. The most common functions used to measure the similarity are the Euclidean and Cosine, but some researchers have noted some limitations in these functions conventional proximity, in the step of search by similarity. For that reason, the Bregman divergences (Kullback Leibler and I-Generalized) have attracted the attention of researchers, due to its flexibility in the similarity analysis. Thus, the aim of this research was to conduct a comparative study over the use of Bregman divergences in relation the Euclidean and Cosine functions, in the step similarity of content-based image retrieval, checking the advantages and disadvantages of each function. For this, it was created a content-based image retrieval system in two stages: offline and online, using approaches BSM, FISM, BoVW and BoVW-SPM. With this system was created three groups of experiments using databases: Caltech101, Oxford and UK-bench. The performance of content-based image retrieval system using the different functions of similarity was tested through of evaluation measures: Mean Average Precision, normalized Discounted Cumulative Gain, precision at k, precision x recall. Finally, this study shows that the use of Bregman divergences (Kullback Leibler and Generalized) obtains better results than the Euclidean and Cosine measures with significant gains for content-based image retrieval.

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Chapter 2 - Cystatin C is a cationic protein is not glycosylated, produced a steady state for all nucleated and present in biological fluids cells being freely filtered by the glomeruli and almost completely catabolized in the proximal tubule, it is a promising early renal dysfunction marker. This study aimed to determine and compare the serum concentration of cystatin C biomarker in 86 dogs. The animals were divided into four groups according to serum creatinine levels: G1 - up. 1.4 mg / dL (23 animals), G2 - 1.5-2.0 mg / dL (16 animals), G3 - 2.1 to 5.0 mg / dL (24 animals) and G4 - above 5.1 mg / dL (23 animals). There was the measurement of the parameters used in the clinical routine of small animals such as urea, urinary gamma glutamyl transferase, proteinuria, alkaline phosphatase, sodium, potassium, chloride, calcium, phosphorus, calcium/phosphorus ratio and cystatin C. There was no statistical difference for urea, proteinuria, phosphorus, calcium/phosphorus, potassium and cystatin C, however, the other showed no statistical difference. Based on the results we can infer that cystatin C was not a good early indicator of kidney disease in dogs. Chapter 3 - This study aimed to determine the hematological and urinalysis elements such as density, proteinuria, cylinders and pH in 86 dogs The animals were divided into four stages according to serum creatinine levels: I - up to 1.4 mg/dL (23 animals), II - 1.5-2.0 mg/dL (16 animals), III from 2.1 to 5.0 mg/dL (24 animals) and IV - above 5.1 mg/dL (23 animals). In stage III, IV there was anemia normocytic normochromic type. Stage II had a leukocytosis frame by neutrophilia with a regenerative left shift and stage III and IV detour degenerative left. The density remained within the reference values all stages. Proteinuria showed statistical significance for the classification 2+ (1.0 g/L), between stage I and II, II and IV. Only the cylinder granular statistical difference in the classification 2+ between stage II and III, and 3+ between stage I and III. The prevailing pH was acid. The haematological values compared to serum creatinine stages showed the changes in hemoglobin and packed cell volume erythrocytes become more pronounced as serum creatinine values rise , this is also the behavior of neutrophils rods and proteinuria.

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Este texto tem por objetivo de analisar o livro "Educaçao pelas atividades físicas, esportivas e de lazer" (1979), de Auguste Listello, reconhecido no Brasil como uma das obras sobre a Educaçao Física Desportiva Generalizada. Para tanto, procurei discutir o contexto de produçao das bases teóricas e das principais conceituaçoes para a produçao do livro em questao bem como apresentar a obra, seus(s) autor(es) e suas ideias balisares. . A publicaçao desta obra no fins da década de 1980 materializa um longo processo de circulaçao e pretensao de apropriaçao dos princípios da Educaçao Física Desportiva Generalizada no Brasil, tendo como porta voz principal a figura do Prof. Auguste Listello

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Este texto tem por objetivo de analisar o livro "Educaçao pelas atividades físicas, esportivas e de lazer" (1979), de Auguste Listello, reconhecido no Brasil como uma das obras sobre a Educaçao Física Desportiva Generalizada. Para tanto, procurei discutir o contexto de produçao das bases teóricas e das principais conceituaçoes para a produçao do livro em questao bem como apresentar a obra, seus(s) autor(es) e suas ideias balisares. . A publicaçao desta obra no fins da década de 1980 materializa um longo processo de circulaçao e pretensao de apropriaçao dos princípios da Educaçao Física Desportiva Generalizada no Brasil, tendo como porta voz principal a figura do Prof. Auguste Listello

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Este texto tem por objetivo de analisar o livro "Educaçao pelas atividades físicas, esportivas e de lazer" (1979), de Auguste Listello, reconhecido no Brasil como uma das obras sobre a Educaçao Física Desportiva Generalizada. Para tanto, procurei discutir o contexto de produçao das bases teóricas e das principais conceituaçoes para a produçao do livro em questao bem como apresentar a obra, seus(s) autor(es) e suas ideias balisares. . A publicaçao desta obra no fins da década de 1980 materializa um longo processo de circulaçao e pretensao de apropriaçao dos princípios da Educaçao Física Desportiva Generalizada no Brasil, tendo como porta voz principal a figura do Prof. Auguste Listello