成像系统中Wollaston棱镜的光学性能

给出了Wollaston棱镜的透射比及位相延迟与入射角的关系,就Wo11aston棱镜用于成像系统中的性能进行了研究。     

Thermally unstable maghaemite and its palaeoclimatic significance in Chinese loess

Magnetite and maghaemite are the two main contributors to magnetic susceptibility in the Chinese loess/palaeosol sequence. Due to the close similarity in physical properties, early investigators treated them together as "magnetite". Utilising the property of thermally instability of maghaemite, we have been able to separate it from magnetite in loess and palaeosol samples from the upper parts of the Xifeng and Luochuan sections on the central Chinese Loess Plateau and compare its variation with depth and horizon. Our results indicate that thermally unstable maghaemite is relatively enriched in both 1) weakly weathered loess units and 2) towards the west, the direction of dust supply, suggesting that maghaemite is at least partially (coarse grains) of detrital aeolian origin while some pedogenic maghaemite (extra fine grains) occurs in the palaeosols. The physical meaning of magnetic susceptibility, therefore, needs to be reconsidered as a synthetic indicator reflecting the palaeoenvironment for both source area and deposition area. Thermally unstable goethite is a minor magnetic component of palaeosol samples, but it may play a significant role in determining characteristic magnetic remanence of weakly weathered loess samples, especially when one applies alternating-field cleaning.     

恒稳磁场效应对多元束配合物体系显色反应影响的研究(Ⅱ)

研究了恒稳磁场效应对W（V）－KSCN－RhB－PVA124体系显色反应的影响,发现在一定范围内,恒稳磁场能显著地提高该多元配合物体系显色反应的灵敏度．在0．05μg／mLW（V）0．7％KSCN,0．05％TiCl31．50mol／LHCl．0．12％PVA1240．0045％的RhB和室温条件下,强度为80mT的恒稳磁场能将最大吸收波长580nm处的显色灵敏度提高65．1％．     

新型涡流磁阻尼月球着陆器

针对三支撑月球着陆器摩擦式阻尼材料存在的真空冷焊问题,对非接触式涡流磁阻尼在月球着陆器上的应用进行了分析和试验.应用电磁学基本理论对涡流磁阻尼的基本特性进行了分析,得出了阻尼特性基本方程.使用DASP数据采集与分析软件,对新型涡流磁阻尼月球着陆器原理模型的缓冲特性进行了试验测试.结果表明,新型涡流磁阻尼月球着陆器具有较好的缓冲效果.     

高温直流超导量子干涉器心磁图仪的研制

研制了用于心磁测量的直流高温量子干涉器,并建立了单通道高温直流超导量子干涉器心磁图仪. 根据临床诊断标准,在磁屏蔽室内依次调节无磁床的位置,采集了人体胸前平面5×5正方格子上各点的心磁数据. 实验结果表明,健康人与心脏病患者的心脏磁场信号存在明显差异. 利用该系统,可为心脏病的临床诊断提供有价值的实验数据.     

场的统一

继新磁场被发现以后,再对该场的确立进行论证 在新磁场发现的基础上运用对立统一规律,对场进行统一,简述场统一的深远影响。     

Neurobiology and neuroimmunology of Tourette’s syndrome: an update

Tourettes syndrome is a childhood-onset neuropsychiatric disorder characterized by the presence of both multiple motor and vocal tics. While the pathogenesis at a molecular and cellular level remains unknown, structural and functional neuroimaging studies point to the involvement of the basal ganglia and related cortico-striato-thalamo-cortical circuits as the neuroanatomical site for Tourettes syndrome. Moreover, Tourettes syndrome has a strong genetic component, and considerable progress has been made in understanding the mode of transmission and in identifying potential genomic loci. Summaries of recent findings in these areas will be reviewed, followed by a critical overview of findings both supporting and challenging the proposed autoimmune hypothesis of Tourettes syndrome. We conclude that Tourettes syndrome is a heterogeneous disorder, and that immune factors may indeed be involved in some patients.Received 12 August 2003; received after revision 8 October 2003; accepted 31 October 2003     

纳米晶软磁合金及其各向异性理论

介绍纳米晶软磁合金的各向异性理论及FINEMET、NANOPERM、HITPERM等3种典型纳米晶软磁材料的研究进展,对于高温条件下使用的Fe Co基纳米晶软磁合金进行了讨论及展望.     

从分子电流观点推导"点磁荷"生磁公式

按照载流细长螺线管和细长磁铁表面分子电流具有相同的生磁作用,推导出“点磁荷“生磁的公式,并同时揭示了磁极上“磁荷“产生的磁场,实质上是细长磁铁表面分子电流的合磁场.