重离子在束穆斯堡尔谱学

八十年代后期在西德UNILAC 和VICKSI 重离子加速器上相继建立了在束穆斯堡尔装置,进行库仑激发反冲注入穆斯堡尔谱学研究。本文评述这一新领域和在应用方面所取得的引人注目的成果。     

Numerical study of shock diffraction in dusty gases

ＮＵＭＥＲＩＣＡＬＳＴＵＤＹＯＦＳＨＯＣＫＤＩＦＦＲＡＣＴＩＯＮＩＮＤＵＳＴＹＧＡＳＥＳＷｕＱｉｎｇ－ｓｏｎ（吴清松）ＺｈｕＨｏｎｇ（朱红）ＸｕＹａｎ－ｈｏｕ（徐燕侯）（ＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅｎｃｅａｎｄＴｅｃｈｎｏｌｏｇｙｏｆＣｈｉｎａ,...     

高效液相色谱法荧光检测测定鱼中痕量硒含量

,5-benzopiazselenol (NSD)formed by reaction of Se(IV) and 2,3-diaminonaphthalene(DAN) was ex-tracted with cyclohexane and then injected into an HPLC ODS column( 150mm × 5mm)with a moblie phaseof acetonitrile at a flow rate of 1.0mL/min and detected fluorimetrically. The selenium content in fish hasbeen determined by this method with good results and recoveries. The limit of detection was 0.1ng.     

气相色谱法用于分枝杆菌脂肪酸组成与菌种鉴定的研究

采用非极性毛细管柱气相色谱法对３株分枝杆菌细胞脂肪酸化学组成进行了研究,得到特异性指纹识别图,并对７例临床分离的分枝杆菌进行了鉴别。结果表明,结核菌硬脂酸（ＴＳＡ）为分枝杆菌属的特征组分,其含量与其他中长链脂肪酸的百分组成随菌种不同而异。     

Control of transpiration cooling system and its characteristics

This paper gives the mathematical model of three-dimensional transpiration cooling control system in heat shield.Generally,it.a non-linear control system on variable-domain mixed up with both distributed and concentrated parameters.This paper points out that the thermal and ablative problems of the shield can be solved solely with the coolant flow only under one-dimensional incompressible or steady condition.In regard to the surface ablating problem of the thermal shield,the control schemes of the system,including its simplified condition and the characteristics of one-dimensional point control is suggested here.Solutions of the equilibrium state are given with or without phase change as far as the coolant is concerned.     

Electronic effects on radiation damage in α-iron:A molecular dynamics study

Iron(Fe)-based alloys, which have been widely used as structural materials in nuclear reactors, can significantly change their microstructure properties and macroscopic properties under high flux neutron irradiation during operation,thus, the problems associated with the safe operation of nuclear reactors have been put forward naturally. In this work, a molecular dynamics simulation approach combined with electronic effects is developed for investigating the primary radiation damage process in α...     

约束对陶瓷/钢复合靶板抗侵彻性能的影响

为探究施加约束对陶瓷破碎位移规律和陶瓷复合装甲抗侵彻性能的影响，采用光滑粒子流体动力学-有限元法（SPH-FEM）对柱状弹侵彻陶瓷/钢复合靶板进行了数值模拟，根据陶瓷复合装甲的破坏响应特性和弹体运动、受力变化，对侵彻过程进行了阶段划分，并在此基础上分析了自约束、侧向约束、面板约束3种约束方式对陶瓷破碎位移的影响，并对靶板防护性能进行了改进。结果表明：通过施加约束限制陶瓷锥的位移是充分发挥陶瓷复合装甲防护能力的关键，施加3种约束方式均能够减小破碎陶瓷的横向位移或纵向位移，从而在一定范围内有效提升陶瓷复合靶板的抗侵彻能力。     

对称空间和齐性等参子流形

本文讨论了对称空间和齐性等参子流形之间的密切关系，并利用Satake图（B，θ）给出对称空间G／K的迷向表示的主K-轨道与齐性等参子流形M之间的一一对应，同时还得到（B，θ）与标有重数的Dynkin图D（M）之间的对应     

利用煤气化残渣构建Fe3O4和Fe负载的碳基复合吸波材料

本研究以煤气化残渣作为碳基载体，通过湿化学浸渍法和焙烧处理制得不同磁性组分负载的复合吸波材料。结果表明，在焙烧过程中，主要发生缓慢的碳热还原反应，磁性组分物相由Fe₂O₃、Fe₃O₄转变为Fe，同时碳热还原反应消耗掉一部分活性较高的碳，复合材料的石墨化程度变差。由于良好的阻抗匹配与衰减特性，复合材料Fe CGR1000体现出更佳的吸波性能，当涂层厚度为2.0 mm时，最低反射损耗值为-25.3 d B，在涂层厚度为1.5 mm时，有效带宽达到4.0 GHz。本研究的开展不仅实现了煤气化残渣资源化利用，而且为煤气化残渣的高附加值应用提供新思路。     

Manipulating Skyrmion Motion on a Nanotrack with Varied Material Parameters and Tilted Spin Currents

Magnetic skyrmions are topological quasiparticles with nanoscale size and high mobility, which have potential applications in information storage and spintronic devices. The manipulation of skyrmion’s dynamics in the track is an important topic due to the skyrmion Hall effect, which can deviate the skyrmions from the preferred direction. We propose a new model based on the ferromagnetic skyrmion, where the skyrmion velocity can be well controlled by adjusting the direction of the current. Using ...