Infiltration behaviour of water in a carbon nanotube under external pressure

The wetting behaviour and associated pressure effect of water in single-walled carbon nanotubes (SWCNTs) are investigated through molecular dynamics (MD) simulations. It is found that water molecules can enter SWCNTs via surface diffusion, and the effective infiltration rate increases with pressure. The effect of pressure on infiltration rate is highly non-linear, exhibiting characteristics of both hydrophilic and hydrophobic surfaces. There exists a nominal infiltration pressure that is dependent on the SWCNT size, above which the water flux is significantly increased.     

Surface tension of substantially undercooled liquid Ti–Al alloy

It is usually difficult to undercool Ti–Al alloys on account of their high reactivity in the liquid state. This results in a serious scarcity of information on their thermophysical properties in the metastable state. Here, we report on the surface tension of a liquid Ti–Al alloy under high undercooling condition. By using the electromagnetic levitation technique, a maximum undercooling of 324 K (0.19 T _L) was achieved for liquid Ti-51 at.% Al alloy. The surface tension of this alloy, which was determined over a broad temperature range 1429–2040 K, increases linearly with the enhancement of undercooling. The experimental value of the surface tension at the liquidus temperature of 1753 K is 1.094 N m^?1 and its temperature coefficient is ?1.422 × 10^?4 N m^?1 K^?1. The viscosity, solute diffusion coefficient and Marangoni number of this liquid Ti–Al alloy are also derived from the measured surface tension.     

武警某地区基层干部自我效能感研究

目的:探讨基层干部自我效能感的现状及其所呈现出的特点,为提升干部素质,提高管理水平提供参考。方法:采用标准问卷进行现场调查。结果:①基层干部的自我效能感在成长环境、是否独生、立功受奖等三个维度上没有显著差异;②基层干部的自我效能感在基层工作时间维度上有显著差异;③基层干部的自我效能感在成长环境和是否独生两个维度上的主效应和交互效应没有显著差异;④基层干部的自我效能感在基层工作时间和立功受奖两个维度上的交互效应没有显著差异。     

记忆源检测的加工分离

同一个记忆源检测任务是否可以依赖两种不同的加工——无意识启发式加工和有意识系统式加工,是源检测加工机制研究探索的一个重要问题。本研究拟借助加工分离程序来分离同一个源检测任务中的启发式和系统式加工,并进一步考察了启发式和系统式加工受刺激呈现时间的影响。结果发现:位置源检测任务依赖于启发式和系统式两种加工,且随着刺激呈现时间的增长,系统式加工的贡献显著地提高,启发式加工的贡献却无显著提升。这一结果既验证了记忆源检测的双加工机制,也暗示了两种加工在加工深度上的差异。     

杜光庭与蜀地道教——兼论其咏道诗的思想内涵

唐朝是我国道教发展的繁盛时期,尤其是唐玄宗在位期间,李唐王朝的崇道活动更是被推向了顶峰。但是唐朝中期以后,道教在前进的发展进程中却遭遇到强劲的阻力,先是安史之乱,后     

小学教育专业大学生总体幸福感与应对方式的关系研究

目的探讨大学生应对方式与主观幸福感的关系。方法用《总体幸福感量表》和《简易应对方式问卷》对小学教育专业大学生进行问卷调查,并用spss17.0进行数据整理和相关分析。结果积极应对与总体幸福感的3个维度存在显著性差异(p<0.05);消极应对与总体幸福感的4个维度存在显著性差异(p<0.05),应对方式对幸福感的回归效应显著。结论应对方式是影响大学生幸福感的重要心理因素。     

Font size modulates saccade-target selection in Chinese reading

In alphabetic writing systems, saccade amplitude (a close correlate of reading speed) is independent of font size, presumably because an increase in the angular size of letters is compensated for by a decrease of visual acuity with eccentricity. We propose that this invariance may (also) be due to the presence of spaces between words, guiding the eyes across a large range of font sizes. Here, we test whether saccade amplitude is also invariant against manipulations of font size during reading Chinese, a character-based writing system without spaces as explicit word boundaries for saccade-target selection. In contrast to word-spaced alphabetic writing systems, saccade amplitude decreased significantly with increased font size, leading to an increase in the number of fixations at the beginning of words and in the number of refixations. These results are consistent with a model which assumes that word beginning (rather than word center) is the default saccade target if the length of the parafoveal word is not available.     

聋童和正常儿童在内隐和外显记忆上的发展差异

本研究采用自行编制计算机化的加工分离程序(PDP)．旨在探讨聋童和正常儿童是否在内隐和外显记忆上存在不同的发展模式。结果显示：(1)人群和年龄对内隐记忆没有显著影响,而外显记忆存在显著的人群差异和年龄差异;(2)外显记忆的人群和年龄存在显著的交互作用,聋童随年龄增长,其外显记忆存在显著的发展,而正常儿童的外显记忆有略微的下降。本研究结果支持意识和无意识的权衡理论．并为聋童教育提供了一些启示。     

语言耗损研究述评

本文概述语言耗损研究的历史与现状,包括语言耗损研究的主要内容和意义,以及目前存在的若干问题和难点。作者强调指出,语言耗损乃语言习得的伴生产物,关系极其密切．研究习得决不能忽视研究耗损。此外,由于环境因素对语言耗损有重要影响以及非同源语言对语言习得具有负面作用,研究汉语语言环境下外语耗损对中国的外语教学具有特殊的重要意义。     

东晋南朝上清经中的"兆"

本文以东晋南朝的道教上清派经典为研究对象,认为在这些文献中多用"兆"来指称修行者,如果论证成立,则是对道教修行者称谓的一个补充,也是对"兆"在宗教文献中特殊含义与用法的发掘.