闭孔泡沫铝准静态压缩试验及吸能特性研究

为研究闭孔泡沫铝厚度及密度变化对其静态力学性能和吸能特性影响,采用液压式WE-1000万能试验机对其进行静态压缩试验.结果表明:泡沫铝厚度由50 mm增加到100 mm,致密化应变和能量吸收分别增长10％～28％、30％～50％,而弹性模量和平台应力基本保持不变;闭孔泡沫铝的密度从0.35 g/cm3增加到0.65 g...     

写“被遗忘了的历史”--读长篇小说《巴水苍茫》

历史创作是很难的。要凭新的人生发现，新的历史意识，方能写出被人忽略和遗忘的历史。《巴水苍茫》上卷提供的“袍哥世界”，除了联系到历史，还与巴水三峡险恶的自然条件及船民的生存需要联系起来．通过人物创造，表现了不同的巴蜀文化．下卷后50年，是迄今为止历史叙事很难取得突破的领域．在没有(或不可能)形成新的历史视角的情况下，通过把宏大叙事细化，深入历史生活的创作，仍可以有很大的作为。     

现代人的神话和象征——从瑶族史诗《密洛陀》到蓝怀昌的《波努河》

运用神话—原型批评分析方法 ,结合瑶族史诗《密洛陀》 ,对瑶族作家蓝怀昌的长篇小说《波努河》里人物形象的原始意象作初步探讨 ,以感受远古人类民族文明与当代文化艺术之间脉脉相承可谓类似或相应的象征意义。     

水槽中驻孤波的参数激励分析

从流体力学方程组出发，引入新的尺度假设，基于多重尺度分析，导出了计及激励、损耗在内的水槽孤波支配方程和驻孤波解，通过耗散分析，给出了下截止驱动振幅△_ｃ随驱动频率Ω的约束关系和在△－Ω图象中等振幅线。本文低功率因数尺度假设更符合实际情况，且更有利于解释实验。 关键词：     

Long—Range Effects on the Pyroelectric Coefficient of Ferroelectric Superlattice

Long-range effects on the pyroelectric coefficient of a ferroelectric superlattice consisting of two different ferroelectric materials are investigated based on the transverse Ising model.The effects of the interfacial coupling and the thickness of one period on the pyroelectric coefficient of the ferroelectric superlattics are studied by taking into account the long-range interaction.It is found that with the increase of the strength of the long-range interaction,the pyroelectric coefficient decreases when the temperature is lower than the phase transition temperature;the mumber of the pyroelectric peaks decreases gradually and the phase transition temperature increases,It is also found that with the decrease of the interfacial coupling and the thickness of one period.the phase transition temperature and the number of the pyroelectric peaks decrease.     

VARIETIES OF CP VIOLATION IN NEUTRAL B MESON DECAYS

We discuss various CP violation effects of neutral B mesons within the framework of the standard model.We classify 28 hadronic two-body decay channels of neutral B mesons into four classes,each of them has different CP violation effects, that is,CP violation due to phase dif- ference between mixing elements M₁₂ and Г₁₂; due to that between mixing elements and decay amplitudes; due to CP phase in the pure particle decay amplitudes and the interplay of these sources .Cascade decays of these channels are also discussed where copious interference is taken into account .Results are given in re- phasing invariants of the K-M matrix .It is shown that CP violation effects might be large(tHe largest,10^-1,but the CP asymmetry event branching cross section is small,at the order or approximate 10^-5±1/2.     

前苏联和俄罗斯模糊理论研究与应用情况概述

对前苏联20世纪80年代及苏联解体后俄罗斯20世纪90年代的模糊理论研究与应用情况作了概述,列举了在人工智能认知的模糊原理、信息论的模糊性和模糊空间、随机模糊规划、工业用综合模糊控制系统等领域的研究成果,并列出90多篇（部）俄文文献资料。     

Identification of a 9/2-[505] isomer in the neutron-rich 193Os nucleus

The neutron rich nucleus ¹⁹³Os was produced in the ¹⁹²Os(⁷Li, ⁶Li)¹⁹³Os reaction. An isomeric state based on the 9/2^-[505] Nilsson orbital was identified in the present work. The half-life of the isomeric state was extracted and discussed in terms of the K quantum number. A level scheme built on the isomeric state was proposed based on the experimental data.     

模糊推理的灵敏度

借助于模糊逻辑连接词的灵敏度,定义了模糊推理系统的灵敏度,研究了几种常见的模糊推理系统的灵敏度,进一步估算了各种模糊推理机的灵敏度,并将模糊推理系统的灵敏度与模糊连接词灵敏度的关系用等式表示出来。     

The Time-Dependent Moments and Correlation Functions of the Intensity of a Single-Mode Dye Lase

By combining linear approximation with Novikov theorem we derive first the time-dependen tmoments of laser intensity for colored saturation loss-noise, colored gain-noise and coloredloss-noise models of a singlemode dye laser. We analyze and compare the time-evolutioncharacter of timedependent moments of laser intensity for three models. The intensitycorrelation functions and correlation time for the colored saturation loss-noise model arederived and compared to the corresponding quantities for colored gain-noise and coloredloss-noise models. We show that, due to saturation effects in the considered laser model, theeffect of which the correlation time of the noise hides the differences between the in tensitycorrelation functions of the models is weakened. It can be seen from the evolution curves ofthe intensity correlation time versus the pump parameter that the dye laser exists criticalslowing-down.