中小企业自主创新障碍及对策

创新是一个国家和一个地区经济发展的不竭动力，文章从中小企业在自主创新过程中的障碍入手，为中小企业如何提高自主创新能力提供建议。     

温情 诗意 成长——《草房子》的死亡叙事探析

《草房子》是曹文轩成长小说的代表作，小说的叙述多次涉及死亡。其死亡叙事充分体现了三方面的特征：即充满了浓浓的温情；诗意的叙述；死亡是儿童精神成长的特殊契机。     

Morphological control of zinc tricarbohydrazide perchlorate crystals: Theoretical and experimental study

The theoretical crystal-morphology of zinc tricarbohydrazide perchlorate (ZnCP) was studied using the morphology simulation software. The growth trends and surface characteristics were calculated using the Bravais-Friedel-Donnay- Harker (BFDH), Growth Morphology, and Equilibrium Morphology methods; these provide theoretical guidance for the choice of crystal-control reagents. On the basis of the simulations, experiments were carried out to study the effects of five different crystal-control reagents, including carboxymethylcellulose (A), polyacrylamide (B), dextrin (C), Tween 40 (D), and Tween 60 (E), in the control of the crystal-morphology of ZnCP. Mixtures of two reagents and higher temperatures were used to further optimize the ZnCP crystals. The results show that ZnCP crystals are well dispersed, and have a large apparent density and regular crystal-morphology under the control of a mixture of reagents A and E in a mass ratio of 1:4 at 80°C.     

基于高分辨率遥感影像的城市建设区提取

以北京市部分区域的QuickBird影像为实验数据,运用面向对象的影像分析手段,研究城市建设区的自动识别和提取方法。在分析城市建设区特征的基础上,采用在低分辨率影像上粗提取,在高分辨率影像上精提取相结合的技术,提高提取精度。经过与目视判读结果的对比,城市建设区的识别率达到89.7%,误判率为27.6%。     

英语电影欣赏与教学设计——以美国电影《辛德勒的名单》为例

英语电影欣赏的教学设计应以电影的文化层面为主要内容，结合影片创作中的一些艺术性手段，通过影片内容中的历史文化背景使学习者在欣赏的基础上，展开思维发散，培养学生的文化底蕴及变异思维能力。美国电影《辛德勒的名单》的教学设计，应抓好教学准备、影片赏析、教学回顾等环节，切实提高学生的探究和欣赏能力。     

庄子“无用之用”对产品设计的启示研究

文章从庄子“无用之用”的寓言故事出发，介绍了庄子对“无用之用”的理解，并将这一观点与产品设计活动联系起来。文章并通过具体产品来分析“有用无用”对产品设计活动的启示，即怎样通过变通创新来使产品更加具有创意。     

浅谈预防混凝土裂缝的措施

在工程建设中，混凝土裂缝的现象普遍存在，尽管采取各种措施加以预防，但仍难以避免。通过实践观察和研究，对裂缝产生的原因及处理进行阐述。     

儒学在多元价值世界的现代转化——杜维明新儒学思想初探

儒学的复兴是当前中国人必须思索的一个课题。文章探讨了儒学参与“全球对话”的可能性，如何实现儒学在21世纪创造性的转化，从而使儒学成为全球化语境中一种声音的可能。     

Chemistry of ion coordination and hydration revealed by a K+ channel-Fab complex at 2.0 A resolution.

Ion transport proteins must remove an ion's hydration shell to coordinate the ion selectively on the basis of its size and charge. To discover how the K+ channel solves this fundamental aspect of ion conduction, we solved the structure of the KcsA K+ channel in complex with a monoclonal Fab antibody fragment at 2.0 A resolution. Here we show how the K+ channel displaces water molecules around an ion at its extracellular entryway, and how it holds a K+ ion in a square antiprism of water molecules in a cavity near its intracellular entryway. Carbonyl oxygen atoms within the selectivity filter form a very similar square antiprism around each K+ binding site, as if to mimic the waters of hydration. The selectivity filter changes its ion coordination structure in low K+ solutions. This structural change is crucial to the operation of the selectivity filter in the cellular context, where the K+ ion concentration near the selectivity filter varies in response to channel gating.     

Electrodeposition and characterization of thermoelectric Bi<Subscript>2</Subscript>Se<Subscript>3</Subscript> thin films

Bi₂Se₃ thin films were electrochemically deposited on Ti and indium tin oxide-coated glass substrates, respectively, at room temperature, using Bi(NO₃)₃·5H₂O and SeO₂ as starting materials in diluted HNO₃ solution. A conventional three-electrode cell was used with a platinum sheet as a counter electrode, and a saturated calomel electrode was used as a reference electrode. The films were annealed in argon atmosphere. The influence of cold isostatic pressing before annealing on the microstructure and thermoelectric properties of the films was investigated. X-ray diffraction analysis indicates that the film grown on the indium tin oxide-coated glass substrate is pure rhombohedral Bi₂Se₃, and the film grown on the Ti substrate consists of both rhombohedral and orthorhombic Bi₂Se₃.