p-HPcZn与肌红蛋白结合性能的研究

利用荧光光谱和同步荧光光谱技术研究了在模拟人体生理条件下β-四(羧基苯氧基)锌酞菁（p-HPcZn）与肌红蛋白的相互作用。p-HPcZn能够显著地猝灭肌红蛋白的荧光,说明两者之间存在着很强的相互作用。变温荧光光谱实验的结果确证该作用可以导致p-HPcZn分子和肌红蛋白分子之间形成复合物,使得p-HPcZn可以通过静态猝灭有效地猝灭了肌红蛋白的荧光。通过对荧光光谱的数据进行处理得知,p-HPcZn分子和肌红蛋白分子形成复合物的结合常数为2.481×105,结合位点n为0.444。另外,p-HPcZn和肌红蛋白之间发生的相互作用还使肌红蛋白分子的构象发生改变。     

考虑床面边界层效应的波浪海床相互作用分析

在考虑海床表面附近黏性边界层的影响下, 考察了波浪与弹性多孔海床之间的相互作用．波浪场包括势流部分和边界层部分,海床域控制方程由比奥固结理论给出．波浪场和海床域通过交界面处应力连续和速度连续条件进行耦合．在简谐波和小变形的前提下,通过联立求解势流方程、波浪边界层方程和海床准静态比奥固结方程得到了波浪运动及相应的海床动力响应的解析解．通过与以往文献的实验结果进行对比,解析解的合理性得到了验证．通过参数分析讨论了实际问题中需要考虑波浪和海床相互作用机制的海床土质条件,以及流体黏性对波能衰减的影响规律．      

Generation and characterization of millimeter-scale plasmas for the research of laser plasma interactions on Shenguang-III prototype

In order to produce millimeter-scale plasmas for the research of laser-plasma interactions （LPIs）, gasbag target is designed and tested on Shenguang-III prototype laser facility. The x-ray pinhole images show that millimeter-scale plasmas are produced with the gasbag. The electron temperature inferred from the stimulated Raman scattering （SRS） spectrum is about 1.6 keV. The SRS spectrum also indicates that the electron density has a fiat region within the duration of 200 ps. The obvious differences between the results of the gasbag and that of the void half hohlraum show the feasibility of the gasbag target in creating millimeter-scale plasmas. The LPIs in these millimeter-scale plasmas may partially mimic those in the ignition condition because the duration of the existence of a flat plasma density is much larger than the growth time of the two main instabilities, i.e., SRS and stimulated Brillouin scattering （SBS）. So we make the conclusion that the gasbag target can be used to research the large-scale LPIs.     

液化场地桩基侧向响应分析中p-y曲线模型研究进展

采用非线性Winkler地基梁模型分析侧向液化土-桩相互作用所面临的首要难题是液化土p-y曲线的确定.因此较全面地阐述了液化土p-y曲线模型的国内外研究历史、现状与重要成果,对获得液化土p-y曲线不同试验手段的典型试验作一简明分析,并概括了桩基侧向响应分析中常用的液化土p-y曲线.液化土p-y曲线的模型研究国外已取得不少很有价值的科研成果并开始用于桩基设计中,而国内才刚刚起步且以试验研究为主,基于这个事实,提出了对曲线模型研究的若干建议与认识,为曲线模型研究提供一些技术思路.液化土p-y曲线模型研究水平的提升将推动我国发展基于变形的液化场地桩基桥梁抗震设计方法.      

Circulating turbulent fluidization—A new fluidization regime or just a transitional phenomenon

While circulating fluidized bed （CFB） reactor has many advantages over the more conventional turbulent fluidized bed （TFB） reactor, it does at least have one significant shortcoming-the rather dilute solids volume concentration in CFB reactor gives rise to less ideal reaction intensity. On the other hand, while having higher reaction intensity, TFB reactor has one fatal drawback of particle back-mixing, making it not suitable for certain reactions such as catalytic reaction where the catalyst requires frequent regeneration. This paper describes some key issues in the development of a circulating turbulent fluidized bed （CTFB） reactor that combines the advantages of both TFB and CFB, that is, to have the high reaction intensity as in TFB but and also to have a suppressed solids back-mixing as in CFB due to a continuous net upflow of solids flux through the bed. Experimental results show enough evidence to suggest that a new fluidization regime is formed, the characteristics of which appears to be distinct from those observed in a regular TFB and from those in either the bottom or the upper sections of regular CFB and/or high-density CFB （HDCFB）. Fundamentally, the difference is that particle-particle interaction （collision） dominates the motion of particles in CTFB and TFB, while gas-particle interaction （drag force） is the key element that determines the two phase flow in CFB including HDCFB.     

A Method of Large—scale Object Forward Compton Scattering Imaging

In the field of Compton scatter imaging,the problem of how to get a meaningful image from large-scale object is still not fully sttled.The difficulty mainly lies in the method of the compensation of the attenuation,Based on the principle of small-angle forward scattering,a new attenuation correction method is deduced in this paper,we can distinguish air from other materials even it is deep inside a large-scale object .To verify our method,we design a model of a one-meter-long object and perform Monte Carlo simulations with MCNP software.     

奇妙的空间光孤子

空间光孤子是当今非线性光学前沿的热点之一,在介绍稳态光孤子的形成机理之后,文章重点评述了空间光孤子奇特的相互作用行为以及它们在光控制光诸方面的应用前景。此外,文章还介绍了非相干光空间光孤子方面的最新动态。     

质谱在激光等离子体物理研究中的应用

在对激光等离子体相互作用的研究中,物质由于在激光场的作用下离子化而成各种离化态的离子,研究这些离子的特性可以深入理解激光与等离子体相互作用过程,质谱仪能提供离子的最高离化态、平均电荷态、能量分布和丰度等重度信息,文章介绍了质谱仪的原理及的原理及其在激光等离子体中的应用。     

光与新型氧化物材料的相互作用及其应用

文章概述了光与几种新型氧化物材料相互作用研究现状,应用和将来可能的发展方向,这些新型氧化物包括高温氧化物超导体,巨磁电阻材料和铁电体,介绍了光激发状态下氧化物的输运特性,电磁特性的变化规律,报道了近年来主要的实验方法和研究结果,总结了光与氧化物相互作用时有关光响应和光激发的可能机制,讨论了现有实验结果的潜在应用,指出了将来在材料工程,光电器件,信息技术等方面应用的研究方向。     

激光感生碰撞能量转移实验

首次观察到Eu(6s6p)^P9/2至Sr(5s10s)^1So、准稳态翼为紫翼的激光感生碰撞能量转移实验现象,其荧光波长为458.42nm,峰值转移激光波长为459.75nm,并对其激发函数谱随温度和随转移激光能量改变进行实验研究,测量了激光感生碰撞能量转移谱的截面,证实了激光感生碰撞能量转移谱为非对称谱。