从分子结构式估算凝聚炸药最高装药密度

本文应用对应态原理建立了一种从凝聚炸药的分子结构式估算其最高装药密度的经验方法。应用此法对101种环状化合物的密度进行了估算,计算值与实验值的平均偏差为1.08％。与类似工作相比,本文方法精度较高,使用方便。

国际等离子体科学与技术会议

在国际等离子体科学与技术会议上共提出论文117篇,代表了在这个领域中最近的发展和成就.论文集分综述、热等离子体(近平衡)和低气压等离子体(非平衡)三个部分.热等离子体方面包括基本过程和模型,诊断,等离子体系统,熔化和气化,冶金,化工过程和热解.低气压等离子体方面包括基本过程和模型,诊断,聚合和表面处理,蚀刻和沉积. 本文包括四部分,即会议概况,主要学术内容,会议特点和等离子体技术前景.

激光谱线测速原理讨论

本文探讨了利用激光谱线频移及谱线形变形来测示气体宏观运动速度及运动方式的问题。对Doppler加宽和压力加宽同时起作用的情况,求出了非饱和谱线形的普适表达式及频移关系;对三个典型流动和Doppler加宽为主的情况,求出了非饱和谱线形的具体表达式,给出频移关系及非饱和谱线形移动量和变形量与气体宏观运动速度及宏观运动方式之间的定性定量关系。

数学机械化问题中的向量加工

<正> 1.多项式算法 数学机械化必须首先解决一类数学问题本身的机械化算法问题。作者通过微分方程机械化的实践,并分析了近年来各数学分支领域机械化的结果,认识到这样一个基本事实:相当多一类数学问题的机器定理证明和公式推导,都是对其问题本身寻求代数表示方法,其核心问题最后归结为多项式算法。因此,多项式算法是一个典型的机械化算法。

Histórico das comissões permanentes da Câmara dos Deputados, 1823-2004

Traz uma síntese histórica das comissões permanentes da Câmara dos Deputados no período de 1823-2004 elaborada com o objetivo de tornar disponível aos parlamentares, à Mesa e aos demais órgãos da casa, aos usuários internos e externos, uma importante fonte de informação sobre o legislativo brasileiro no âmbito da Câmara dos Deputados. O autor realizou pesquisas retrospectivas nos textos de resoluções e demais dispositivos que disciplinaram as atividades de elaboração legislativa na casa, visando estabelecer as bases da síntese histórica, tendo como marco inicial a instalação da Câmara dos Deputados.

大陆板块运动的经验规律

本文通过观测到的板块运动速度和一个参数(有效洋脊长度和大陆板块面积的比值)间的关联,得到了一个线性关系经验规律,这规律预言存在三个不等式,即:(1)海洋板块底部的粘性《大陆板块底部的粘性;(2)转换断层阻力《洋脊推力;(3)海沟一岛弧区或造山带的阻力《洋脊推力.前一预言已得到证实,但后两个仍有待将来观测的检证.一个简化的力学分析显示,沿洋脊的边界推力和在大陆板块底部的粘性表面阻力形成大陆板块上的主要作用力.

高频感应放电理论与特性计算方法

本文以双渠道模型为基础,考虑气体流动、对流传热、热辐射修正,利用等效温度能量平衡计算法,求出了等离子体放电特性和其他参数,并同现有文献进行了比较,能给出很好结果,而计算大大简化。本文还推导了各种边界条件下的传热计算方程,而对等离子体同振荡器的耦合、匹配、结构参数和运行参数的选择原则,以及实践经验,也作了详尽的讨论和分析。

双放电CO_2激光器非稳定腔输出及脉冲宽度影响因素的实验研究

<正> 一、问题的提出 双放电CO_2激光器在研究与物质相互作用及用于工业加工生产中是一种很灵便和有其独特优点的器件。在具体应用中一般对输出光束的质量和脉冲宽度都有一定的要求,即要求单模输出和脉冲宽度在大的范围内可调。 在对材料打孔中发现,一个稳定的单模输出打出的孔在显微镜下观察是一个很圆的小孔,反之,多而不规则的模式打出的孔则呈畸形,甚至中间出现小岛,达不到加工的要求。

关于工程地震的若干问题

<正> 研究工程地震是为了经济而有效地設計和加强建筑物的結構部分,使它們能够成功地抗御在它們的使用期間可能遭遇到的地震。我國处于一个强震活动比较頻繁的区域。因而,工程地震的研究具有明顯的現实意义。

Predicting chaotic time-series with wavelet networks

A new technique, wavelet network, is introduced to predict chaotic time series. By using this technique, firstly, we make accurate short-term predictions of the time series from chaotic attractors. Secondly, we make accurate predictions of the values and bifurcation structures of the time series from dynamical systems whose parameter values are changing with time. Finally we predict chaotic attractors by making long-term predictions based on remarkably few data points, where the correlation dimensions of predicted attractors are calculated and are found to be almost identical to those of actual attractors.

[Discurso do Deputado Valério Magalhães : Sessão da Câmara dos Deputados de 09 de novembro de 1962]

Questiona as reclamações de deputados quanto às condições de trabalho e de habitabilidade de Brasília e alerta quanto às manifestações para o retorno da Capital para o Rio de Janeiro.

The thermal and mechanical structure of a two-dimensional plume in the earths mantle

On the condition that the distribution of velocity and temperature at the mid-plane of a mantle plume has been obtained (pages 213–218, this issue), the problem of determining the lateral structure of the plume at a given depth is reduced to solving an eigenvalue problem of a set of ordinary differential equations with five unknown functions, with an eigenvalue being related to the thermal thickness of the plume at this depth. The lateral profiles of upward velocity, temperature and viscosity in the plume and the thickness of the plume at various depths are calculated for two sets of Newtonian rheological parameters. The calculations show that the precondition for the existence of the plume, δT/L 1 (L = the height of the plume, δT = lateral distance from the mid-plane), can be satisfied, except for the starting region of the plume or near the base of the lithosphere. At the lateral distance, δT, the upward velocity decreases to 0.1 – 50% of its maximum value at different depths. It is believed that this model may provide an approach for a quantitative description of the detailed structure of a mantle plume.