泡沫沥青与乳化沥青冷再生混合料的水稳性比较

泡沫沥青及乳化沥青混合料作为最常用的柔性再生混合料,具有广泛的应用前景.由于现行路面设计要求较低及路面所用集料粒径的增大,部分水分会穿过面层渗入到基层,这就要求基层具有良好的水稳性.本试验选取4个沥青含量,采用湿劈裂强度及干湿劈裂强度比两个指标对两种混合料的水稳性进行了比较.通过对混合料成型机理、试验现象及试验结果的分析,得出乳化沥青混合料水稳性优于泡沫沥青混合料的结论.     

加氢裂化常压塔轻石脑油干点软测量

先进控制技术可以把若干个变量控制在期望的控制点上，从而达到装鼍效益的整体优化。近年来，各种先进控制软件在催化裂化装置、加氢裂化等装置上得到了广泛的应用。为了实施加氢裂化装置的先进控制，需要在线计算其产品质量指标。轻石脑油干点就是其中一个质量指标。为了避免单纯依靠过程数据进行软测量建模而导致的计算结果与工艺分析结果相矛盾的情况，结合过程数据和质量指标的关联公式，利用粒子群算法建立轻石脑油的软测量模型。该软测量模型已在现场实施，应用结果表明，该模型有较高精度。     

Microstructure and Texture Evolution of Cold-Drawn 〈111〉 Single-Crystal Copper

The evolution of microstructure and texture in drawn 〈111〉 single-crystal copper with strains from 0.28 to 4.12 was analyzed. The texture analysis shows that in drawn 〈111〉 single-crystal copper, grain subdivision takes place, and at high strains, fiber textures consist of 〈111〉 and 〈100〉. However, the distribution of fiber textures is inhomogeneous along the radial direction. 〈111〉 is located in the center of samples and 〈100〉 is near the surface. Comparison of the texture evolution of drawn 〈111〉 and 〈100〉 single-crystal coppers indicates that the initial orientation is an important factor affecting the ratio of fiber texture 〈111〉 to 〈100〉. The results of microstructure show that at strains lower than 0.28, microstructure can be characterized as dislocation cells and few microbands. When strains are more than 0.58, a large number of extended planar dislocation boundaries appear. At strains more than 1.96, most of the extended planar boundaries are parallel to the drawn direction.     

The role of familiarity in daily well-being: Developmental and cultural variation.

The present study examined life stage and cultural differences in the degree to which familiarity of one's physical location and interaction partner is associated with daily well-being. Participants reported all the activities they engaged in and how they felt during these activities on a previous day using the Day Reconstruction Method (Kahneman, Krueger, Schkade, Schwarz, & Stone, 2004). Both Korean and American retirees were happier when in a familiar place than in an unfamiliar place, whereas the reverse was true for both Korean and American working adults. In addition, we found cultural differences in the role of familiarity of the interaction partner. Specifically, Koreans (both retirees and working adults) were substantially happier when they interacted with a familiar person than when they interacted with an unfamiliar person. In contrast, Americans (both retirees and working adults) were no happier with a familiar person than with an unfamiliar person. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

基于组织结构的毛衫装饰设计应用

组织结构是毛衫的主要装饰设计手法之一.通过国内外品牌毛衫组织装饰设计应用的数据对比分析,得出我国毛衫组织设计存在比较单一、装饰单调,缺乏新意等缺点.对不同组织结构产生的肌理效果及其在针织毛衫功能性与装饰性上的应用比较分析,通过设计实践认为,将组织与横机技术、纱线、色彩等相结合,在设计手法上创新,开发兼具功能性与装饰性的...     

基于国内外城镇化发展实践的齐齐哈尔城镇化建设研究

西方发达国家己经初步完成了高度城市化和城乡一体化进程．而发展中国家也在不断加快城镇化的步伐。中国作为世界上最大的发展中国家．在进入21世纪以后．城镇化成为我国经济和社会持续协调发展的必由之路．本文对齐齐哈尔城镇化的发展历史．现状与问题进行了科学系统地分析研究．通过对国内外城镇化发展实践的分析．针对齐齐哈尔城镇化发展中的有关问题．提出齐齐哈尔城镇化发展的具体对策与建议。为齐齐哈尔地区城镇化发展提供参考依据。     

堇青石的人工合成

堇青石在耐火材料和陶瓷窑具材料中的应用可以明显改善制品的热震稳定性和重烧线变化性能。使制品既具有一定的强度，又有较长的使用寿命，朝着节能、优质、高产的方向发展。但天然堇青石数量少，性能差，在工业生产中常用人工合成的优质堇青石，考虑到在其生产成本较高，还不能广泛的应用。因此我们通过调整配方中的原料组成，充分利用本厂的资源优势（氧化铝及氢氧化铝），降低了产品成本。     

Hydrothermal synthesis of MnCO3 nanorods and their thermal transformation into Mn2O3 and Mn3O4 nanorods with single crystalline structure

MnCO₃ nanorods with diameters of 50-150 nm and lengths of about 1-2 μm have been prepared for the first time by a facile hydrothermal method. Mn₂O₃ and Mn₃O₄ nanorods were obtained via the heat-treatment of the MnCO₃ nanorods in air and nitrogen atmosphere, respectively. The morphology and structure of the as-synthesized MnCO₃, Mn₂O₃ and Mn₃O₄ nanorods were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and selected area electron diffraction. It was found that the MnCO₃ nanorods are single-crystalline, and their morphology and single-crystalline characteristic can be sustained after thermal transformation into Mn₂O₃ and Mn₃O₄. The corresponding growth directions for MnCO₃, Mn₂O₃ and Mn₃O₄ nanorods were [2 1 4], [1 0 0] and [1 1 2], respectively. When applied as anode materials for lithium ion batteries, the Mn₂O₃ and Mn₃O₄ nanorods exhibited a reversible lithium storage capacity of 998 and 1050 mAh/g, respectively, in the first cycles.     

Synthesis,Biological Evaluation of 1,1‐Diarylethylenes as a Novel Class of Antimitotic Agents

The cytotoxic activities of 23 new isocombretastatin A derivatives with modifications on the B‐ring were investigated. Several compounds exhibited excellent antiproliferative activity at nanomolar concentrations against a panel of human cancer cell lines. Compounds isoFCA‐4 ( 2 e ), isoCA‐4 ( 2 k ) and isoNH₂CA‐4 ( 2 s ) were the most cytotoxic, and strongly inhibited tubulin polymerization with IC₅₀ values of 4, 2 and 1.5 μM , respectively. These derivatives were found to be 10‐fold more active than phenstatin and colchicine with respect to growth inhibition but displayed similar activities as tubulin polymerization inhibitors. In addition, cell cycle arrest in the G₂/M phase and subsequent apoptosis was observed in three cancer cell lines when treated with these compounds. The disruptive effect of 2 e , 2 k and 2 s on the vessel‐like structures formed by human umbilical vein endothelial cells (HUVEC) suggest that these compounds may act as vascular disrupting agents. Both compounds 2 k and 2 s have the potential for further prodrug modification and development as vascular disrupting agents for treatment of solid tumors.     

Applications of HPLC/MS in the analysis of traditional Chinese medicines

In China.traditional Chinese medicines (TCMs) have been used in clinical applications for thousands of years.The successful hyphenation of high-performance liquid chromatography (HPLC) and mass spectro...