排序方式: 共有168条查询结果,搜索用时 46 毫秒
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刘晶晶 《大众科学.科学研究与实践》2018,(1)
正自残!这一朵暗夜之花是表演?是痛苦?还是发泄?无论是什么,其实它离我们很近。非自杀性自伤行为"非自杀性自伤行为"简称NSSI,它是指一切故意地、直接地、不为社会所接受的对自我身体的损害或改变,并且不带有试图自杀目的的行为。NSSI的发生常常与生理、心理或精神上的其他不健康的因素息息相关,也与边缘性人格有着很大的正相关。 相似文献
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A diode-pumped Tm:YLF passively Q-switched laser at 2 μm was first demonstrated by using graphene oxide(GO) as a saturable absorber(SA).In this letter,continuous-wave(CW) laser and pulse laser performances were studied meticulously and systematically.It reasonably showed the dependence of the pulse duration,pulse energy,and pulse repetition rate on the absorbed power.A maximum repetition rate of 38.33 kHz and a single pulse energy of 9.89 μJ were obtained. 相似文献
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针对分布式计算中任务调度的复杂性、动态性和实时性等特点,构建了一个基于多Agent的分布式多目标任务调度模型.此模型中,设计了一种分布武调度机制,使每个节点都具有独立的调度决策能力,增强了系统的可扩展性.同时为了解决分布式调度所产生的节点间任务通信问题,引入任务与节点相关性等概念,有效地降低了节点间的通信代价.模型对多个评价指标进行了综合衡量,如任务调度开销、任务最早执行时间、负载均衡及节点问的通信量等,并根据任务和系统运行的状态特征,实现多目标任务调度,提高了系统的整体性能. 相似文献
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Based on the magnetic monopole(MM) catalytic nuclear decay(Rubakov-Callan(RC) effect),we propose five new models to discuss the limit of the MM flux and the heating energy resources of white dwarfs(WDs)based on observations of 13 red giant branch(RGB) stars.We find that the number of MMs captured can reach a maximum value of 9.1223 × 1024 when m=1017 GeV,nB=5.99×1031 cm-3,φ=7.59×10-26cm-2s-1sr-1.The good agre... 相似文献
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结合黄河流域水生态的现状,分析了影响当今水生态环境问题的自然和人为因素,提出了保护黄河流域水生态环境的对策。 相似文献
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By using the new Coulomb screening model and most recent experimental results, this paper calculates the resonance reaction rates of ^21Na(p,γ)^22Mg. The derived result shows that the effect of electron screening on resonant reaction is prominent in astrophysical interesting temperature range. In conjunction with the experimental results, the recommended rates of^21Na(p,γ)^22 Mg would increase at least 10%, which undoubtedly affect the nucleosynthesis of some heavier nuclei in a variety of astrophysical sites.[第一段] 相似文献
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刘晶晶 《江西科技师范学院学报》2008,(2):99-102
《一个亿·泡女郎》引发了广泛的争议。面对类似《一个亿·泡女郎》的当代艺术作品,无论是猛烈抨击,还是高度赞扬都是片面的。在多元的经济、多元的文化价值观并存的时代背景中,观众应以宽容的态度,辩证地看待当代艺术家的艺术结晶。 相似文献
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