高超声速流动研究进展

<正>高超声速的英文名称hypersonic,是钱学森先生1946年命名的。由于洲际导弹、卫星、飞船、航天飞机以及当前国际上十分关心的各种高超声速飞行器的研制需要,过去的半个多世纪,世界大国纷纷投入力量开展高超声速流动研究,使其成为最为活跃的力学研究领域之一。

加速器驱动反应堆的靶实验及核废料嬗变与焚化

对加速器辅助驱动次临界核反应堆的最近研究进展 ,特别是靶实验结果 ,进行了评述 .通过对靶实验首次全产物截面的测定 ,达到了剥离反应与裂变反应二者产物的完全识别 .

Can theories of social capital explain dissenting patterns of engagement in the new Europe?

Korosteleva-Polglase, Elena, 'Can theories of social capital explain dissenting patterns of engagement in the new Europe?', Contemporary Politics, (2006) 12(2) pp.175-191 RAE2008

Ciberstalking

Dissertação apresentada à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Psicologia Jurídica

Energy levels, radiative rates, and collision strengths for transitions in Fe XVII

Energy levels and radiative rates have been calculated for fine-structure transitions among the lowest 89 levels of the (1s(2)) 2s(2)2p(6), 2s(2) 2p(5) 3 l, 2s(2) 2p(5) 4l, 2s2p(6) 3 l, and 2s2p(6)4l configurations of Fe XVII using the GRASP code of Dyall et al. Collision strengths have also been calculated, for transitions among the lowest 55 levels, using the recently developed Dirac atomic R-matrix code (DARC) of Norrington & Grant. The results are compared with those available in the literature, and the accuracy of the data is assessed.

Highly efficient asymmetric hetero-Diels-Alder reactions of carbonyl compounds catalyzed by Lewis acid platinum complexes of conformationally flexible NUPHOS-type diphosphines

Conformationally flexible NUPHOS-type diphosphines have been resolved as their diastereopure platinum BINOLate complexes delta- and lambda-[(NUPHOS)Pt{(S)-BINOL}] and the corresponding enantiopure Lewis acids delta- and lambda-[(NUPHOS)Pt(OTf)(2)], being generated by protonation with trifluoromethanesulfonic acid, act as highly efficient catalysts for the hetero-Diels-Alder reaction of nonactivated conjugated dienes with aryl glyoxals and glyoxylate esters, giving ee's as high as 99%.