堆石料填筑标准对狭窄河谷面板堆石坝应力变形的影响研究

为研究堆石料填筑标准对于狭窄河谷高面板堆石坝应力变形的影响规律,本文运用三维有限元法,以某高面板堆石坝工程为例,进行了堆石料不同填筑标准下的大坝应力变形特性的对比研究。结果表明:随着堆石料填筑标准的提高,坝体和面板的应力变形均基本呈现单调递减的变化规律,且堆石料填筑标准对坝体和面板应力变形的影响存在一个明显的"拐点",如本文工程实例的主堆石料干密度影响"拐点"为2.16 g/cm3。因此,通过提高堆石料填筑标准,可以明显改善狭窄河谷中高面板堆石坝的应力变形状况,但应注意堆石料填筑标准对大坝应力变形的影响存在"拐点"这一特性。     

氯碱装置避峰填谷安全经济稳定运行总结

介绍了山东铝业公司氯碱厂氯碱装置采用避峰填谷的方式组织生产的情况及效果,并提出了注意事项。     

澜沧江流域电站卫星通信网络建设方案

根据澜沧江流域电站传输业务需求分析，提出澜沧江流域电站卫星通信网络建设方案。     

Exploring the design space of robots: Children''s perspectives

Children's perceptions and evaluations of different robot designs are an important unexplored area within robotics research considering that many robots are specifically designed for children. To examine children's feelings and attitudes towards robots, a large sample of children (N = 159) evaluated 40 robot images by completing a questionnaire for each image, which enquired about robot appearance, robot personality dimensions and robot emotions. Results showed that depending on a robot's appearance children clearly distinguished robots in terms of their intentions (i.e. friendly vs. unfriendly), their capability to understand, and their emotional expression. Results of a principal components analysis of the children's ratings of the robots' personality attributes revealed two dimensions labelled ‘Behavioural Intention’ and ‘Emotional Expression’. Robots were classified according to their scores on these two dimensions and a content analysis of their appearance was conducted in an attempt to identify salient features of different robot personalities. Children judged human-like robots as aggressive, but human–machine robots as friendly. Results on children's perceptions of the robots' behavioural intentions provided tentative empirical support for the Uncanny Valley, hypothesized by (Mori, M., 1970), reflecting a situation where robots are very human-like, but still distinguishable from humans, evoking a feeling of discomfort or repulsion. The paper concludes with a discussion of design implications for robots, and the use of robots in educational contexts.     

流域水资源调度决策支持系统

水资源管理决策支持系统是流域水资源管理走向现代化、智能化的重要标志。结合水资源管理的主要任务和特点，在总结国内外水资源管理决策支持系统研究进展的基础上，简述水资源管理决策支持系统的功能集成和程序实现。     

幔源基性岩席在某些层状铜矿成矿过程中的作用及机理

对中条山以及狼山北坡层状铜矿的研究以及国内外其它类似层状铜矿的对比，认为幔源基性岩浆活动与层状铜矿存在密切的时空联系，可作为成矿所必需的热源、热液源和矿源岩．其控矿成矿方式可能有展状矽卡岩化、驱动海底与沉积岩系内部热卤水对流循环，在有利界面处成矿以及韧性剪切活化成矿等．     

河谷地应力场的数值模拟

本文讨论了河谷区岩体地应力场的形成过程，提出了河谷区岩体地应力场的数值模拟方法，并应用于工程实践之中。     

中子辐照对隧道二极管性能的影响

本文介绍了中子辐照环境中,隧道二极管性能的退化,即谷电流增加,峰谷比下降、摆幅电压减少。用二次隧道效应理论解释了这种退化过程。     

微咸水膜下滴灌棉田漫灌洗盐评价

合理利用微咸水灌溉对缓解淡水紧缺有重要意义。为评价漫灌对微咸水膜下滴灌棉田地表以下0~60 cm深度积盐的淋洗效应,2013年漫灌前、后采用EM38-MK2型电磁感应仪进行大地表观电导率(ECa)调查,通过取样率定得出对应盐分解译模型。将解译获得的漫灌前、后土壤含盐率作为区域化变量,经K-S检验为正态分布,并分别服从指数和球状半方差函数模型。变程相近而基台值远大于灌前,表明灌后变异程度增强。Kriging插值结果显示,实际不合理的漫灌方式,使得灌后土壤返盐,0~60 cm深度范围积盐增量达4.1×104kg/hm2。利用HYDRUS-1D建立土壤水盐运移模型模拟优化的灌水定额为360 mm,较实际灌水定额615 mm节水255 mm,脱盐率为39.3%。持续微咸水灌溉需要完善的农田排水、排盐渠系和盐分排泄区。     

防蒸发材料局部覆盖干旱区平原水库节水试验研究

内陆干旱区水库蒸发量大,对新型防蒸发材料的研究有利于减少无效蒸发提高水库的有效利用率。通过防蒸发材料覆盖部分库面试验,统计完整周期内不同气象条件下防蒸发材料的有效覆盖面,根据影响防蒸发因子出现的概率,计算其有效防蒸发量,验证其节水效果。以内陆干旱区某一典型平原水库为现场试验对象,依据试验初步成果,对上述问题进行了探讨。