可瘪管定常流动自激振荡

可瘪管流动自激振荡现象在医学和医学工程上有重要意义。本文从一维流动方程出发.分析流动惯性、粘性和管壁弹性相互作用引起的稳定性问题,讨论重力和外压梯度的影响,并通过模型实验,考察不同激振机理引起的振动特性。

布居数反转的非平衡流模拟计算——对流动激光器性能的研究

<正> Ⅰ.引言 40年代不可逆过程热力学已形成一个新的领域。60年代初对扩散、传热、导电、弛豫以及热电、电磁等不可逆过程的各种唯象处理已被综合为统一的体系——非平衡态热力学。由于热机、气体放电、热核聚变以及天体物理、地球物理等方面的研究和发展,流体力学与非平衡态物理学相结合而形成的非平衡流问题的研究已扩展到广泛的领域,流体力学与非平

二阶非线性微分方程亚/超谐共振的一种求解方法及其应用研究

本文引用了非线性共振频率的概念,指出如何求主共振频率域及其中心。采用新的办法对单自由度非线性系统的亚/超谐共振进行了研究。作为例子讨论了Duffing方程,给出了1/7,1/5,1/2,3/5,5/3,2,5次谐波共振的结果。模拟计算机的计算结果对所给理论作了部分验证。

第3届全国复合材料学术会议

<正> 会议于1984年11月2—7日在杭州举行,由中国宇航学会、中国航空学会和中国力学学会共同主办,全国科研、设计、生产部门和大专院校13个学院87个单位的221名代表参加了会议,大会收到学术报告312篇,接受了182篇,会前即预印了论文集,120篇论文分别在材料工艺、性能测试与应用、静动态力学性能、结构设计分析以及金属基复合材料五个组

Pensar a justiça restaurativa no Brasil

Anais da Audiência Pública realizada na Câmara dos Deputados pela Comissão de Legislação Participativa, no dia 19 de outubro de 2005, para debater sobre o paradigma da justiça restaurativa como alternativa à justiça criminal.

Non-die explosive forming of spherical pressure-vessels

This paper presents a newly developed method of manufacturing spherical pressure vessels based on the technology of non-die explosive forming. Compared with the traditional method, this technology does not need any dies and pressing equipment, so that the cost of the production process can be greatly reduced, especially for vessels of less than 100 m3 capacity.

On the invariant representation of spin tensors with applications

The invariant representation of the spin tensor defined as the rotation rate of a principal triad for a symmetric and non-degenerate tensor is derived on the basis of the general solution of a linear tensorial equation. The result can be naturally specified to study the. spin of the stretch tensors and to investigate the relations between various rotation rate tensors encountered frequently in modern continuum mechanics. A remarkable formula which relates the generalized stress conjugate to the generalized strain in Hill's sense. to Cauchy stress, is obtained in invariant form through the work conjugate principle. Particularly, a detailed discussion on the time rate of logarithmic strain and its conjugate stress is made as the principal axes of strain arc not fixed during deformation.

[Discurso do Deputado Taciano de Melo : Sessão da Câmara dos Deputados de 12 de janeiro de 1956]

Entrevista do Marechal José Pessoa, Presidente da Comissão de Localização da Nova Capital Federal, aos jornais O Globo, Correio da Manhã e O Jornal, sobre os trabalhos executados para localização do local mais apropriado para a instalação da nova sede do Governo Federal.

Statistical modeling of damage evolution in spallation

In order to understand the mechanism of the incipient spallation in rolled metals, a one dimensional statistical mode1 on evolution of microcracks in spallation was proposed. The crack length appears to be the fundamental variable in the statistical description. Two dynamic processes, crack nucleation and growth, were involved in the model of damage evolution. A simplified case was examined and preliminary correlation to experimental observations of spallation was made.

Presidentes da Câmara dos Deputados : 22º - Ranieri Mazzilli

Resumo da vida pública de Paschoal Ranieri Mazzilli. Inclui referências bibliográficas de trabalhos e discursos de Ranieri Mazzilli e de obras sobre ele.

O federalismo cooperativo no Brasil : o perfil do Estado brasileiro segundo a Constituição Federal de 1988

Analisa a organização do Estado Federal brasileiro, estabelecida pela Constituição Federal de 1988, a partir de estudos da doutrina especializada e de trabalhos e informações de estudiosos sobre o tema proposto. Aborda a repartição de competências determinada pela atual Constituição, de forma a identificar se as relações intergovernamentais existentes entre os entes federados ocorrem de maneira a caracterizar um federalismo cooperativo no Estado brasileiro.