Is there chaotic synchronization in space extend systems

Based on coupled map lattice (CML), the chaotic synchronous pattern in space extend systems is discussed. Making use of the criterion for the existence and the conditions of stability, we find an important difference between chaotic and nonchaotic movements in synchronization. A few numerical results are presented.

Elastodynamic stress-intensity factors for a semiinfinite crack under 3-d combined mode loading

The dynamic stress intensity factor histories for a half plane crack in an otherwise unbounded elastic body are analyzed. The crack is subjected to a traction distribution consisting of two pairs of suddenly-applied shear point loads, at a distance L away from the crack tip. The exact expression for the combined mode stress intensity factors as the function of time and position along the crack edge is obtained. The method of solution is based on the direct application of integral transforms together with the Wiener-Hopf technique and the Cagniard-de Hoop method, which were previously believed to be inappropriate. Some features of solutions are discussed and the results are displayed in several figures.

Presidentes da Câmara dos Deputados : 14 º - Antônio Carlos Ribeiro de Andrada

Resumo da vida pública de Antônio Carlos Ribeiro de Andrada. Inclui referências bibliográficas de trabalhos escritos por Antônio Carlos Ribeiro de Andrada e de trabalhos sobre ele.

半焦在流化床燃烧中Cl元素影响CO氧化的试验

在非均匀布风的流化床燃烧系统中进行了半焦中添加PVC/NaCl的混烧试验,研究了Cl元素对燃烧中CO氧化的影响以及混烧时SO_x等污染物的生成规律.试验结果表明,半焦与PVC/NaCl混烧在技术上可行,添加Cl元素抑制CO氧化,加入PVC增加SO_2排放,而加入NaCl则减少SO_2排放.

新型可控坍塌芯片连接技术(C4)及芯下材料力学性能研究进展

可控坍塌芯片连接 (C4)技术可以实现高速、高密度、小外形的封装 ,因此日渐得到关注和发展。然而 ,随着C4技术的普及 ,C4封装内由于芯片和基板间热膨胀系数 (CTE)的不匹配而引起的可靠性问题将日益突出 ,为此研究者在C4封装中引入芯下材料来提高C4封装的可靠性。文中侧重于制造工艺、可靠性以及最新进展对C4技术进行介绍 ,并且对C4技术中所用的芯下材料的力学性能及其对C4封装可靠性影响的研究现状进行评述

Diário da Constituinte [gravação de vídeo] : [programa n. 617]

A emenda da anistia aos microempresários ganha um novo texto que poderá facilitar o acordo para a votação. O primeiro turno deve acabar na próxima semana. Na sessão de ontem foram aprovados três temas importantes. Uma das emendas aprovadas, com 319 votos, é que todos os incentivos fiscais concedidos pela União, estados e municípios serão revistos e poderão ser extintos caso a lei venha considerar que esses incentivos não sejam mais válidos. Foi aprovada a emenda que retira a obrigatoriedade da contribuição sindical. A contribuição só poderá ser definida entre os sindicatos e os empregados. Foi aprovada uma fusão de emendas estabelecendo uma lei agrícola para o país. Os autores da emenda da anistia aos microempresários fizeram um novo texto para facilitar o acordo e a votação da próxima semana. Será anistiada a correção monetária aos micro e pequenos empresários urbanos que fizeram empréstimo entre 28 de fevereiro de 1986 a 31 de dezembro de 1987 e aos pequenos e médios que conseguiram o crédito nesse mesmo período. São classificados como pequenos empresários aqueles que tiveram como receita anual máxima cinco mil OTNS. Os médios empresários serão classificados se tiveram a receita anual máxima de quinze mil OTNS. O novo texto dez que a anistia será concedida se a liquidação dos débitos for feita no prazo de 180 dias a partir da promulgação da nova constituição. E não será excluído o pagamento do débito inicial, acrescido dos juros e taxas. O presidente da constituinte, Ulysses Guimarães, acredita que na próxima semana aconteça o fim do primeiro turno de votação.

Dynamic optimization of track components to minimize rail corrugation

In this paper, the influence on corrugation of the most significant track parameters has been examined. After this parametric study, the optimization of the track parameters to minimize the undulatory wear growth has been achieved. Finally, the influence of the dispersion of the track and contact parameters on corrugation growth has been studied. A method has been developed to obtain an optimal solution of the track parameters which minimizes corrugation growth, thus ensuring that this solution remains optimum despite dispersion of track parameters and wheel-rail contact uncertainties. This work is based on the computer application RACING (RAil Corrugation INitiation and Growth) which has been developed by the authors to predict rail corrugation features.

Collecção das Leis da Republica dos Estados Unidos do Brazil de 1908

Parte 1 - Atos do Poder Legislativo.

Egg production, spawning biomass and factors influencing recruitment of striped bass in the Potomac River and the upper Chesapeake Bay

Ichthyoplankton surveys in the Potomac River and Upper Chesapeake Bay were carried out in 1989 to estimate striped bass egg productions, age specific spawning biomasses of adult females, cohort-specific larval growth and mortality rates, and hatch dates of 8.0 mm larvae survivors. Possible consequences to recruitment of environmental factors were examined in 1989 and for data collected in 1987-1988. The temporal and spatial occurrences and distributions of eggs and larvae In both spawning areas are described and discussed in relation to environmental factors (temperature, rainfall, river discharge, pH, conductivity, zooplankton abundances) (PDF contains 319 pages)

Distribution of fishing effort and resulting tuna catches from the Eastern Tropical Pacific by quarters of the year, 1951-1958

ENGLISH: This is a data report based on information collected from the logbooks of baitboats and purse-seiners engaged in the fishery for yellowfin (Neothunnus macropterus) and skipjack (Katsulvonus pelamis) tuna in the Eastern Tropical Pacific Ocean from 1951 through 1958. The detailed analysis of these data appears in other research bulletins, some already published and others in preparation. SPANISH: Este es un informe basado en los datos contenidos en la información recogida de los registros de bitácora de los barcos de carnada y rederos que se dedicaron a la pesca de atún aleta amarilla (Neothunnus macropterus) y barrilete (Katsuwonus pelamis) en el Océano Pacífico Oriental Tropical de 1951 a 1958. El análisis detallado de estos datos aparece en otros boletines de investigación, algunos de los cuales ya han sido publicados y otros están en preparación.

Interpretazioaren ikerketa-erronka berriak

Raquel Merino Álvarez, José Miguel Santamaría, Eterio Pajares (eds.)

Proceedings of the Fourth Workshop on the Okhotsk Sea and Adjacent Areas

This report is the outcome of the fourth PICES Workshop on “The Okhotsk Sea and Adjacent Waters” held August 27–29, 2008, in Abashiri, Japan. (PDF contains 319 pages)