275 resultados para biblia - N. T. -Apocalipse 14.1

em Chinese Academy of Sciences Institutional Repositories Grid Portal


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本文根据来流马赫数M∞选取坐标变换函数,将M∞→1时的低超声速回球绕流前体流场变换到矩形的计算区域,忽略粘性影响,采用时间相关法,用TVD有限差分格式求Euler方程的定常解,得到了M∞=1.05、1.01和1.005的流场分布。结果与弹道靶的实验吻合较好

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The poly(monoester (6-[4-(p-nitrophenyl) azo]phenoxy-1-hexyloxy) of maleic anhydride) shows a smectic phase with a focal conic fan texture. With the decrease of the monoestering degree the phase transition temperature decreases and the mesomorphic temperature range becomes narrow. The hydrogen bonding between two carboxylic acid groups was found to play a very important role in forming the smectic phase structure. The smectic bilayer structure has been built through self-assembly via. intermolecular hydrogen bonding.

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用密度泛含方法研究了LaC5n(n=-1,0,+1)分子簇的结构和稳定性及振动光谱,对这个六原子体系提出了三种可能构型,点群结构为C2v对称性.第一个构型为La接在弯曲的C5链上,第二个是La通过二个键与C5环相连第三个是La通过一个键与C5环相连;结果表明,第一个构型即当La接在弯曲的C5链上时能量最低.振动光谱分析指出,当n=-1时,第二个构型为局域极小值;当n=+1时,第一个和第二个构型为局域极小值;对n=0,局域极小值没有找到.

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以1,4-萘醌为原料,经溴化、氰化、烷基化合成了1,4-二丙氧基-2,3-二氰基萘,用SiemensP4四圆衍射仪测得了晶体结构。合成方法简便,反应时间短,产率高。

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Presented is an experimental study on the performance of an oil-gas multiphase transportation system, especially on the multiphase flow patterns, multiphase pumping and multiphase metering of the system. A dynamic simulation analysis is conducted to deduce simulation parameters of the system and similarity criteria under simplified conditions are obtained. The reliability and feasibility of two-phase flow experiment with oil and natural gas simulated by water and air are discussed by using the similarity criteria.

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Predictions based on an anisotropic elastic-plastic constitutive model proposed in the first part of this paper are compared with the experimental stress and strain data on OHFC copper under first torsion to about 13% and partial unloading, and then tension-torsion to about 10% along eight different loading paths. This paper also describes the deformation and stress of the thin-walled tubular specimen under finite deformation, the numerical implementation of the model, and the detailed procedure for determining the material parameters in the model. Finally, the model is extended to a general representation of the multiple directors, and the elastic-viscoplastic extension of the constitutive model is considered.

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本文研究了一维非定常气-团二相流的特征,对于目前常用的、包含一定近似的运动方程组,它有两个虚部很小的复根,研究表明这种很小的虚部出现与方程中引入的近似有关。从十多个算例的结果看,这样的虚部不影响人们在工程计算中用该方程组求解初值问题。针对具有上述特征的气-团二相流方程组,本文发展了一种类特征线方法,它保留了双曲型方程特征线方法的若干优点,但它允许方程的特征根中有微小的虚部。含灰气体激波管流动的计算表明,类特征线法具有精度高、数值耗散和弥散小等优点

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用完全二维自洽模型计算等离子体的速度场和温度场。用颗粒轨迹模型计算颗粒的运动轨迹与加热历程。通过对铝颗粒与氢等离子体流的计算表明,颗粒与高频感应热等离子体流的相互作用,不仅对颗粒的运动轨迹和加热历程有影响,而且对热等离子体流的速度场和温度场也有重要影响。

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本文分析了水、淤泥和岩土中爆炸的共性、特性以及不同尺度下的实验结果,讨论了岩土、淤泥中爆炸的运动规律,给出了描述气体膨胀及鼓包运动的特征时间。指出岩土中爆炸的鼓包运动主要是高压气体膨胀和介质惯性运动的结果。总结了鼓包顶点的运动速度和炸药能量间的关系。从中可以发现岩土的强度对鼓包运动的影响不大;或者说,岩土中爆炸的能量利用率与淤泥中爆炸的差别不大。

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本文探讨了浙江北部岛屿区水道岸坡土体滑动的成因机制与滑坡的形态特征,对在波浪与重力共同作用下的边坡稳定性以及波浪底压引起的砂土液化进行了定量分析。研究表明,岛屿区水道中部与岸坡间强烈的冲淤反差,是该海域岸坡土体滑动不稳定因素积累的主要环境条件。目前发现的多数为中到大型的牵引式滑坡,主要由重力作用所致。对于波浪较大、水深较浅海域的粉砂、细砂分布区,浅表砂层存在着发生液化的可能性。

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<正> Ⅰ.目的和意义 海洋石油平台或其它海上石油工程设施(特别是立管、输油管、储油器等)的安全与性能主要取决于它们对各种载荷的响应。在平静的海面上,物体的重量、浮力和各种外部约束力(例如支架或锚链)使物体保持静平衡。然而在有风、海浪、海流、冰、泥沙、地震等自然条件下,物体上将受到各种各样的动力载荷。这些载荷将作为应力分析,疲劳寿命估算的基

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<正> 引言 人们生活在大自然中,上有大气,下有陆地海洋,其间分布着各种植被,组成一个紧密相关的统一体。研究这个统一体内各部分之间水的输运及能量的交换无疑是十分重要而必需的。一个用于这个统一体内过程研究的模型——土壤—植被—大气统一体模型,就是适应这种需要而提出的。以下简称这个模型为SPAC(Soil-Plant-Almosphere Continuum的简称)模型。