词边界信息在句中的分布

用经过删除的语音歧义句作材料，研究了词边界信息在句中的分布。结果说明，在歧义句中歧义音节是最重要的切分线索；向歧义音节的前后过渡也对词切分有贡献；歧义音节和过渡以外的部分在一定条件下对切分有帮助。</p

Photocatalytic Degradation of Phenol by Self-organized Titanium Dioxide Nanotube Arrays

采用电化学阳极氧化法在钛基体上制得了高度致密的、有序的、均匀的TiO2纳米管阵列。用SEM、XRD等对其表面形貌和结构晶型进行了表征和分析。以TiO2纳米管阵列为光催化剂对废水中典型的有机污染物——苯酚进行了光催化降解,考察了影响光催化降解速率的因素。结果表明,在紫外光照下,苯酚水溶液的pH=3、ρ(苯酚)=10.0 mg/L时,具有锐钛矿相结构的TiO2纳米管阵列的光催化效果最好,相同条件下与溶胶凝胶法制备的纳米TiO2颗粒膜的光催化降解速率进行对比,前者比后者提高了近一倍。High-density,well-ordered and uniform titanium oxide nanotube arrays were prepared by electrochemical anodic oxidation.The morphology and crystal structure of the TiO2 nanotubes were characterized and analyzed by SEM and XRD.As a photocatalyst,TiO2 nanotube arrays were used to degrade phenol which is a typical organic pollutant in wastewater.The photocatalytic degradation under UV irradiation is most effective with anatase TiO2 nanotube arrays when pH of phenol solution is 3 and mass concentration of phenol is 10.0 mg/L.Compared with TiO2 nanoparticle coatings prepared by sol-gel process,the photocatalytic degradation rate of TiO2 nanotube arrays is almost doubled under the same experimental condition.国家自然科学基金项目(50571085

Fabrication of Highly Ordered Titanium Dioxide Nanotube Array and Investigation of Its Photocatalytic Activity

采用电化学阳极氧化法在钛表面构筑了一种结构有序、微米级的TiO2纳米管阵列膜层.考察了制备电压、氧化时间、溶液搅拌等实验参数对TiO2纳米管阵列形貌和尺寸的影响.应用SEM和XRD对膜层的形貌和晶型进行了分析和表征,并通过TiO2纳米管阵列膜对甲基橙的光催化降解,研究了TiO2纳米管阵列膜层结构与光催化活性的关系.结果表明:阳极电压和溶液搅拌对制备TiO2纳米管阵列的结构起到关键的作用.控制20V电压制备的TiO2纳米管阵列膜,管长达2.6～3.3μm,经500℃热处理后具有最高的光催化活性,其光催化性能明显优于一般的TiO2纳米颗粒膜.A highly ordered titanium dioxide (TiO2) nanotube array film on titanium substrate was fabri- cated by using an electrochemical anodic oxidation method, and some preparation parameters of the TiO2 nanotube arrays were investigated as well. The SEM and XRD experiments were performed to characterize the morphology and crystalline phase of the TiO2 nanotube arrays. It was found that the morphology of the TiO2 nanotube arrays was greatly associated with the anodization voltage. The photocatalytic activity of the TiO2 nanotube array film was evaluated by the decolorization of methyl orange under the illumination of a high-pressure mercury lamp. The results showed that the TiO2 nanotube arrays prepared at 20 V and an- nealed at 500 ℃ exhibited the best photocatalytic activity to the degradation of methyl orange. And the photocatalytic activity of the TiO2 nanotube array film was much higher than that of the regular TiO2 nanoparticle film.国家自然科学基金(No.50571085);; 福建省科技项目(Nos.2005HZ01-3,2007H0031)资助项目

Progress on Fabrication, Modification and Applications of Titania Nanotube Arrays

第一作者: 孙岚, 女, 41 岁, 博士, 副教授; 研究方向: 纳米材料的制备及其应用。[中文文摘]新型纳米材料TiO2 纳米管阵列具有独特的、高度有序的阵列结构和良好的力学性能、化学稳定性以及抗腐蚀性能。该材料以纯金属钛为基体, 在含有少量氟离子的电解质溶液中通过电化学阳极氧化法制得。本文综述了近年来TiO2 纳米管阵列在不同电解液体系中的制备工艺、形成机理、修饰改性及其在光催化降解污染物、太阳能电池、气敏传感材料、光解水制氢等领域应用的最新研究成果, 并指出目前存在的问题, 对今后的研究提出了展望。[英文文摘]Titania nanotube arrays as a novel nano-material has unique highly ordered array structure, good mechanical and chemical stability, as well as excellent corrosion resistance. It has been fabricated by electrochemical anodization of pure Ti sheet in electrolytes containing small amounts of fluoric ions. This paper reviews the new research achievements of TiO2 nanotube arrays on the preparation processes, forming mechanism, modification and the applications in the photocatalytic degradation of pollutants, solar cells, gas sensor materials,photolysis water. The existing problems and further prospects in this field are also discussed.福建省自然科学基金资助项目(No.2007J0227)。通讯联系人。E-mail: [email protected]

Progress on Fabrication, Modification and Applications of Titania Nanotube Arrays

新型纳米材料TiO2纳米管阵列具有独特的、高度有序的阵列结构和良好的力学性能、化学稳定性以及抗腐蚀性能。该材料以纯金属钛为基体,在含有少量氟离子的电解质溶液中通过电化学阳极氧化法制得。本文综述了近年来TiO2纳米管阵列在不同电解液体系中的制备工艺、形成机理、修饰改性及其在光催化降解污染物、太阳能电池、气敏传感材料、光解水制氢等领域应用的最新研究成果,并指出目前存在的问题,对今后的研究提出了展望。Titania nanotube arrays as a novel nano-material has unique highly ordered array structure, good mechanical and chemical stability, as well as excellent corrosion resistance. It has been fabricated by electrochemical anodization of pure Ti sheet in electrolytes containing small amounts of fluoric ions. This paper reviews the new research achievements of TiO2 nanotube arrays on the preparation processes, forming mechanism, modification and the applications in the photocatalytic degradation of pollutants, solar cells, gas sensor materials, photolysis water. The existing problems and further prospects in this field are also discussed.福建省自然科学基金资助项目(No.2007J0227

Fabrication of highly ordered titanium dioxide nanotube array and investigation of its photocatalytic activity

A highly ordered titanium dioxide (TiO2) nanotube array film on titanium substrate was fabricated by using an electrochemical anodic oxidation method, and some preparation parameters of the TiO2 nanotube arrays were investigated as well. The SEM and XRD experiments were performed to characterize the morphology and crystalline phase of the TiO2 nanotube arrays. It was found that the morphology of the TiO2 nanotube arrays was greatly associated with the anodization voltage. The photocatalytic activity of the TiO2 nanotube array film was evaluated by the decolorization of methyl orange under the illumination of a high-pressure mercury lamp. The results showed that the TiO2 nanotube arrays prepared at 20 V and annealed at 500 degrees C exhibited the best photocatalytic activity to the degradation of methyl orange. And the photocatalytic activity of the TiO2 nanotube array film was much higher than that of the regular TiO2 nanoparticle film

The Inflluence of Negative Stimulus Expectation on Individual Stress and Self-control Ability

对未来事件的预期和准各是人类的基本认知功能。在预期过程中，个体会对某些问题做出决策，形成行为策略，以应对未来生存和发展的需要。近年来，不少行为研究探讨了预期对个体情绪及认知能力的影响。但有关预期对个体自我控制能力影响的研究较为鲜见。本研究采用2(高强度预期和低强度预期)X2(长时间预期和短时间预期)的组间设计，通过现实刺激测验的方法，对某三级医院60名患者医学检查前情绪体验、HRV及反应抑制能力进行测试，从预期强度和预期时长两个维度探索了预期对个体应激及自我控制能力的影响。研究结果显示: 1.在主观情绪感受方面，高强度预期条件下，个体恐惧情绪显著增强(P=0.040 ) 。 而预期时长对个体情绪的影响效应不显著。 2. HRV各指标测量结果显示，预期强度主效应在LF/HF单项指标差异呈边缘显著（P=0.085，其他指标无显著性差异。预期时长对HRV各指标的影响均不显著。 3.在停止信号任务中，高强度预期条件下，信号执行错误率、执行反应时、250ms 停止信号错误率和400ms停止信号错误率均高于低强度预期组。其中，信号执 行错误率差异具有统计学意义;250ms, 400ms停止信号错误率的差异呈边缘显 著。预期时长方面，短时间预期情况下，被试信号执行反应时显著高于长时间预 期组，400ms停止信号错误率则显著低于长时间预期组。 4.在检查配合度与耐受程度方面，低强度预期组被试表现好于高强度预期组:而预 期时长对检查配合度与耐受度的影响均不显著。</p

Psychology—Cross of Natural Science and Social Science

文章概述了心理学的研究主题、学科体系、方法论和学科发展趋势。心理学研究人的心理与行为,兼具自然科学和社会科学的双重属性。其基本研究主题包括意识和心理活动、心理和行为的生物学基础以及心理与行为的发生发展规律等。研究者在生物、个体和社会3个层次,使用不同视角(Perspectives)对这些基本主题进行探讨。按照这些层次和视角,心理学学科体系可以划分为不同的分支和领域。心理学的方法论与其理论取向密切相关,研究方法具有多样性和多源性。在现代科学体系中,心理学成为一门枢纽科学,正在深刻影响其他学科的发展;其内部各个分支之间多层面交叉融合,形成一系列新兴研究领域;在研究人的共性的同时,关注不同文化和种族的差异;心理学应用延伸到越来越广泛的领域,为社会乃至全球性问题的解决发挥着独特的作用。在我国心理学是一个亟待发展与加强的学科领域。尽快提高心理学的科学研究水平,加强原创性研究,发挥心理学在国民经济和社会发展中的作用,提高专业人才培养的数量与质量,是我国心理学科未来发展的重要任务

The Theoretical System, Methodology and Research Trends of Psychology

文章概述了心理学的研究主题、理论体系、方法论和学科发展趋势。心理学研究人的心理与行为,兼具自然科学和社会科学的双重属性。意识和心理活动、心理和行为的生物学基础以及心理与行为的发生发展规律等是基本研究主题。心理学对基本主题的研究在生物、个体和社会3个层次上进行,并且采用了不同的视角(Perspectives)。按照这些层次和视角,心理学学科体系可以划分为不同的分支和领域。心理学的方法论与其理论取向密切相关,研究方法具有多样性和多源性。在现代科学体系中,心理学成为一门枢纽科学,正在深刻影响其他学科的发展;其内部各个分支之间的多层面交叉融合,形成了一系列新兴研究领域;在研究人的共性的同时,关注不同文化和种族的差异;心理学应用延伸到越来越广泛的领域,为社会乃至全球性问题的解决发挥着独特的作用。在中国,心理学是一个亟待发展与加强的学科领域。尽快提高心理学的科学研究水平,加强原创性研究,发挥心理学在国民经济和社会发展中的作用,提高专业人才培养的数量与质量,是我国心理学科未来发展的重要任务

analysis and improvement of statistics-based chinese part-of-speech tagging

从词性概率矩阵与词汇概率矩阵的结构和数值变化等方面 ,对目前常用的基于统计的汉语词性标注方法中训练语料规模与标注正确率之间所存在的非线性关系作了分析 .为了充分利用训练语料库 ,提高标注正确率 ,从利用词语相关的语法属性和加强对未知词的处理两个方面加以改进 ,提高了标注性能 .封闭测试和开放测试的正确率分别达到 96.5%和 96% .中国中文信息学