基于特大型城市变电站设计品质提升的管理创新模式探索

通过分析目前特大型城市变电站设计的发展,重点研究变电站设计品质提升的管理改进技术路线,在保证变电站功能需求的前提下,提出管理模式优化解决方案,消除变电站建设的邻避效应,促进变电站与城市环境的相互融合,为特大型城市变电站建设提供保障。     

对火山岩气田成藏的控制因素以及特征的分析与研究

近年来随着我国社会经济快速发展,对大气的开发也是相当的重视。而这几年来,在我国的松辽盆地的深层火山岩中,我们发现了大量的天然气可供开发。对于火山岩气藏的地质结构的研究中可以说是非常复杂,人们的开发程度还远远不够。火山体多次喷发交互叠置,厚度的变化非常的大,无论是连续性还是对比性都比较差。对于火山岩的开发和应用,可以借鉴的例子很少,在国内几乎是史无前例,也是世界有待解决的困难。起最为明显的原因就是气藏的控制因素并不明确,从而极大的制约了火山岩的开发。本文通过对火山岩气藏的特点的研究,分析,岩性岩相,井型,储层污染等因素对产能的一系列影响以及影响火山岩气田的主要因素。     

小麦白粉病菌的环境扫描电镜观察

运用环境扫描电镜ESEM观察了小麦白粉病菌的超微形态。通过控制样品室气压和样品冷台温度，未经任何处理的菌丝体、分生孢子梗及分生孢子可保持湿润，形态完好，无严重变形和“充电”现象，实验结果表明该仪器十分适用于植物病理学研究。     

抛物线双曲拱坝有限元网格剖分与计算

提出了抛物线双曲拱坝有限元网格剖分的算法 ,即用密切圆包络切线法计算拱弧曲线、按径向扭缝或铅直面横缝计算竖直拱梁曲线的一套方法。     

Preparation and Properties of Unmodified Ramie Fiber Reinforced Polypropylene Composites

Ramie fiber(RF) was used to reinforce the polypropylene(PP). The composites were prepared with a melting hybrid technology. Tests had been performed on PP and composites with different RF contents(10 wt%, 20 wt%, and 30 wt%). By using SEM, DSC, TGA, electronic universal testing machine, HDT-VICAT tester and coefficient of linear expansion tester, the effects of the RF loading were assessed on the basis of morphologies, mechanical and thermal properties as well as vicat softening temperature and CTE of the resulting composites. The results show that the thermal degradation temperature of the PP/RF composites becomes lower with higher fiber content. The crystallization rate of the PP matrix is accelerated by the unmodified RF. Because of the inferior interfacial bonding strength between RF and PP, the tensile strength of composites decreases by the presence of RF. And the RF used is relatively long compared with the diameter, the impact strength of the composites is improved by the unmodified RF. The vicat softening temperature of composites can be increased by about 5 ℃ in the presence of RF compared with PP. The CTE is reduced significantly in the presence of RF. Generally speaking, impact strength, crystallization rate, vicat softening temperature and CTE of PP/RF composites could be improved in the presence of RF. The tensile strength is decreased and thermal degradation temperature of composites becomes lower, but these should not affect most subsequent normal uses of the composites. As the unmodified RF is used directly, no hazardous waste is produced during the fabrication process, combined with the low price, so, a facile and economic preparation pathway is given by using unmodified natural fiber to reinforce polymer and composites with good performance obtained.     

流媒体系统的关键技术研究

流媒体是现代信息技术快速发展的产物。流媒体技术的应用,对人们的工作和生活产生了巨大影响。本文基于流媒体的基本概念,具体阐述了流媒体系统中的关键技术,以期为促进流媒体技术的不断进步提供一定的指导意义。     

超光谱图像的分布式压缩

针对超光谱图像压缩进行了研究,提出了一种有效的基于分布式信源编码(Distributed Source Coding, DSC)的有损压缩算法。该算法利用多元陪集码和标量量化的方式实现超光谱图像的分布式有损压缩,针对分布式信源编码,利用多波段预测的方式为每个编码块构造边信息,然后采用标量量化的方式对编码块和其边信息同时进行量化处理。根据分布式信源编码原理,给出了各编码块量化后的编码码率。为了减少标量量化带来的信息丢失,算法引入了跳跃策越。部分均方误差意义上损失较大的编码块将由其边信息直接代替。实验结果表明,所提出的算法性能与基于小波变换的算法性能相当;此外,该算法复杂度较低,适合星载超光谱图像的压缩。