房地产开发应与城市规划协调发展

分析我国房地产开发过程中存在的问题,阐述了协调城市规划与房地产开发的原则和措施.     

断裂发育区大型桥梁工程水上勘探技术研究

桥梁工程通过断裂发育区的勘探技术是近年来的研究热点.本研究以广东某跨江大型桥梁工程为例,在详细分析其工程地质概况的基础上,采用了综合解译区域构造、改进深水区勘探控制技术、信息化勘察以及三维地质建模等技术手段,并结合常规勘探技术,形成了一套适用于断裂发育区的跨江桥梁的勘探技术,为今后跨江、海断裂发育区桥位勘察积累了成功经...     

加快我国工程塑料的发展

介绍了工程塑料的国内外状况及其国内的生产、消费、增长情况,并提出了一些发展我国工程塑料的建议。     

模塑玻璃钢格栅发展趋势

本文介绍了模塑玻璃钢格栅的国内外发展现状,就其发展前景与趋势进行了预测,对该制品行业所面临的问题进行了分析、探讨,并从模塑玻璃多格栅的生产工艺、产品质量、品种、产品性能温度与研究,市场开拓等多方面提出了一些看法与建议。     

基于轴测图的化工工艺管道三维重建的研究

化工工艺管道的轴测图广泛存在于化工企业的设计和生产中,其表达接近于人们的视觉习惯,形象、逼真,从固定角度观察,有较好的立体感。分析了化工管道轴测图的表达方法和特点,研究了其从二维世界坐标到三维世界坐标的转换算法,阐述了重建过程中图形预处理,图形识别,信息提取,坐标变换和数据存储方法。在Auto CAD环境下,利用二次开发功能,实现了化工管道轴测图的三维重建,验证了算法的可行性。论文的研究结果可以推广至水利、煤气和供暖等领域的工程图纸三维重建。     

Validation of Tuba1a as Appropriate Internal Control for Normalization of Gene Expression Analysis during Mouse Lung Development

The expression ratio between the analysed gene and an internal control gene is the most widely used normalization method for quantitative RT-PCR (qRT-PCR) expression analysis. The ideal reference gene for a specific experiment is the one whose expression is not affected by the different experimental conditions tested. In this study, we validate the applicability of five commonly used reference genes during different stages of mouse lung development. The stability of expression of five different reference genes (Tuba1a, Actb Gapdh, Rn18S and Hist4h4) was calculated within five experimental groups using the statistical algorithm of geNorm software. Overall, Tuba1a showed the least variability in expression among the different stages of lung development, while Hist4h4 and Rn18S showed the maximum variability in their expression. Expression analysis of two lung specific markers, surfactant protein C (SftpC) and Clara cell-specific 10 kDA protein (Scgb1a1), normalized to each of the five reference genes tested here, confirmed our results and showed that incorrect reference gene choice can lead to artefacts. Moreover, a combination of two internal controls for normalization of expression analysis during lung development will increase the accuracy and reliability of results.     

水菱镁石—斜方云石阻燃剂研发应用近期进展

对水菱镁石-斜方云石镁质阻燃剂研发应用近期进展做了评述,包括资源概况（含加拿大、土耳其、希腊和中国）,物性参数、化学组成与矿石品位、开采加工、研究开发成果和近期重点研发课题以及在不同领域中的应用.并展望了开发前景.     

Surface shape development of the pitch lap under the loading of the conditioner in continuous polishing process

Continuous polishing using the pitch lap is a key process in finishing large flat optical elements. The optical elements’ surface figure is primarily dependent on the surface shape of the pitch lap, which is controlled by a large-size conditioner. However, underlying fundamentals of the process control is not yet clear, and it remains empirical and nondeterministic to date. In this study, a novel analysis model is proposed for exploring the surface shape development of the pitch lap under the conditioner loading. The analysis model divides the polishing time into a series of segments, in which the shape variation of the pitch lap due to viscoelastic creep is derived from the pressure distribution at the conditioner-lap contact interface. Further, a contact model of the lap and conditioner is built to obtain the pressure distribution at the interface, and a novel creep model is proposed for the viscoelastic behavior of the pitch lap under the pressure. The analysis model combined with the contact and viscoelastic models can be used to explore the pitch lap shape development under various conditions and hence reveal the underlying fundamentals of controlling the lap shape by the conditioner.     

聚酰亚胺基碳纤维的开发

介绍了作为碳纤维前驱体的聚酰亚胺 (PI)纤维的组成、分子结构和特性 ;叙述了 PI原丝的碳化和石墨化过程。并讨论了 PI基碳纤维在产业发展中将起的重大作用。     

高科技时代建材工业的发展

在高科技时代 ,建筑材料基础理论有了巨大突破 ,在这些理论和现代技术的支撑下 ,建材生产、应用与检测等都实现了高科技化。建材工业是各种资源、能源的消耗大户 ,同时也是环境污染的重点行业 ,如何合理开发利用自然资源 ,生产和使用节能建材 ,保护地球环境是建材工业可持续发展的主题。