“箱中箱”结构立滑板的有限元分析及其优化设计

为了提高机床"箱中箱"结构立滑板的动静态特性,增强机床整机的刚性,在CAD/CAE集成仿真设计平台下,对立滑板分别进行静力学和模态分析,结果表明Y、X向的静刚度有待提高,凸振和摆动较为明显。对此,设计4种改进的立滑板,提出基于模糊变换的动静态性能综合评价法,并从中优选出最佳的改进方案。对改进后的立滑板进行动态优化设计,得到最优的立滑板结构。研究表明:对立滑板进行结构改型和尺寸优化设计能有效地提高动静态性能。     

涤棉织物单面防水泡沫涂层工艺

通过泡沫整理法对涤棉织物进行单面防水整理,使其单面防水的同时反面具有良好的吸湿透气性能。复配了稳定型泡沫防水涂层剂,并探讨了该涂层工艺的最佳焙烘温度和时间。实验结果表明,最佳整理剂配方为防水剂与10%SDS溶液以2∶1混合,并添加CMC 10g/L,HEC 0.5g/L,PTF 5g/L,焙烘温度160℃,时间3min,效果最佳;织物带液率由传统整理的45%降至为26%,节约原料55%。     

建筑卫生陶瓷行业竞争环境SWOT分析

文章通过大量的调查研究,概述了中国特别是广东省建筑卫生陶瓷企业的现状,采用SWOT分析方法,对该行业的企业所处的优势、劣势、面对的机遇和挑战进行了全面的研究分析,预测了建筑卫生陶瓷未来发展的总体趋势。     

Non-polar nuclei in fungal microbial RNases

An application of a previously proposed method for the analysisof the non-polar structure of proteins is presented. A detailedanalysis of the composition and properties of non-polar nucleiand microclusters of fungal microbial ribonucleases has beenperformed on the basis of the 3-D structures of RNase T1 andrelated proteins. Three hydrophobic nuclei were found in thesestructures. It has been shown that all residues in non-polarnuclei have high homology ({small tilde}89%). Residues in thenuclei are practically fully buried in the interior of a molecule.Detailed analysis of non-polar nuclei properties shows thatthese nuclei determine the hydrophobic core of a protein andthe location and role of each residue in the non-polar interiorof proteins. In addition it was found that there are variableresidues not only on the surface of a protein but on the surfaceof the nuclei inside the protein and between the nuclei andthat there is a consistent region in all proteins, the hydrophobic-nuclei. An evaluation of the stability of non-polar nuclei,the conservation of their compositions and their positions inthe protein globule, allows one to assume that these three nucleiplay an important functional role in the stability and foldingof molecules of RNases and possibly can be considered as independentstructural elements of 3-D structures of these proteins.     

Loss of Curing Agent During Thin Film (Droplet) Curing of Thermoset Material

Recently, it has been reported by our group and others^1.2 that loss of curing agent is encountered during the curing of small droplets or thin films of amine cured epoxies. In our earlier study³ results were reported on loss of curing agent in small droplets used in conducting the rnicrobond, single fiber test for determination of interfacial shear strength (ISS). It was reported that use of a volatile curing agent (meta-phenylene diamine (m-PDA) with DGEBA resin) resulted in increasing amounts of curing agent being lost (as measured by T₈ of the cured droplets) with decreasing droplet size during the processing procedure. Droplets smaller than 150 micrometers were seen to lose up to 40% of the curing agent leading to alteration of the mechanical properties of the droplet and, therefore, causing measured values of ISS to be exceedingly low. Use of a less volatile curing agent (Jeffamine 700, a polyether diamine, Texaco Specialty Chemicals) in combination with DGEBA resin produced results which indicated that loss of curing agent was not occuring. This study was undertaken to show the relationships between film (or droplet) size and the amount of curing agent lost (during the processing) for three different aminecured epoxy systems.     

EMD滤波方法在NMR测井中的应用

核磁共振测井中,回波信号的信噪比对T2谱反演及后续地层解释评价过程有重要影响。基于核磁共振测井信号与噪声的分析,提出了一种采用自适应性较强的经验模态分解（ EMD）算法对核磁共振测井原始数据作消噪处理。结果表明,采用该滤波算法,实验室回波数据信噪比由22 dB提高到46 dB,标准油井回波数据信噪比由11 dB提高到31 dB,反演得到的T2分布更加精确,多次重复测量中孔隙度结果有较高的一致性。     

川东北马路背须四段储层裂缝预测

根据马路背须四段现今构造特征,建立起该地区的地质模型,利用数值分析技术,模拟计算马路背须四段气藏岩体的古构造应力场和破裂接近程度系数（η）,结合岩石力学与构造地质学理论、野外裂缝观测结果以及实际生产资料,对马路背须四段裂缝发育程度、裂缝类型及产状进行综合预测,确立马路背翼部高陡带、背斜长轴及断裂带为裂缝的分布发育带,为下一步勘探部署提供依据.     

突变型P53特异性活化T细胞的诱导与扩增

采用多种细胞因子诱导外周血单核细胞分化为成熟的树突状细胞（DC,Dentritic Cell）,将成熟DC与初始T细胞共培养,并连续加入DC刺激从而避免活化的T细胞凋亡。将活化的T细胞转入包被有CD3和CD28抗体的板中,使活化T细胞进一步大量扩增。流式检测多因子诱导后DC表型发现,高表达CD83、CD11c、CD11b、CD80、CD86、CCR7、CD54,低表达CD14、CD3、CD33,说明因子成功诱导单核细胞为成熟DC。流式检测扩增的活化T细胞发现高表达CD3、CD8,含有很低量的调节性T细胞（Treg）,分泌大量的IFN-γ,表明扩增出的细胞中活化T的含量很高,为临床研究提供参考。     

LEA-6T在小型无人机质子磁力仪中的应用

研究的目的是将LEA-6T应用在UAVPM系统中,探讨不同速度对偏航距和定位精度(均方差)的影响。简要介绍了UAVPM系统结构,在此基础上详尽围绕I2 C硬件接口,数据提取,坐标转换等方面阐述LEA-6T与UAVPM系统集成。结合小型无人直升机做飞行实验,实验数据证明集成了LEA-6T的UAVPM做航磁磁测时,飞行速度保持在30km/h以内,满足预期偏航距不大于150m,定位精度(均方差)不大于10m的要求。