非接触式物料水分传感器

为实现固体物料水分含量的在线监测,设计了基于频域反射原理的非接触式物料水分传感器。该传感器基于固体状物料含水量与介电常数的关系,利用电容式探头对介电常数的测量能力,通过水分变化关系实验建立了容积含水量与介电常数的数学模型,并完成了传感器的结构设计和电路设计。实验结果表明:该传感器实现了对固体颗粒状物料水分的准确测量,满足物料水分测量的实际需求。     

基于WDF框架的PXI-E数据采集卡驱动的设计与实现

主要介绍了WDF驱动模型的特点,分析了WDF驱动的基本结构,主要探讨基于WDF的PXI-Express总线的高速数据采集卡驱动的基本开发流程,说明了如何通过DMA实现高速数据传输,以及驱动与应用程序之间的通信机制的设计和同步访问的实现.     

荧光探针法研究结构明确的BzO-PDMAEMA均聚物水溶液性质

通过氧阴离子聚合合成了一系列不同相对分子质量的结构明确的BzO—PDMAEMA，用芘作为荧光探针研究了BzO—PDMAEMA在水溶液中的胶束化行为，发现CMC值与用表面张力法测得的结果相一致，即随BzO—PDMAEMA相对分子质量的增加而减小，但荧光探针法测得的CMC值稍大；LCST值则随相对分子质量的增加而增加。     

应用电导探针测定鼓泡塔内气泡参数

介绍了一种性能稳定的双头电导探针的制作工艺、测量原理。并用此电导探针测量了一定静液层高的带单个泡罩的鼓泡塔内气液两相流参数,包括局部气含率、界面浓度、当量直径等,并首次回归了局部气含率随空间位置、气体流量变化的关联式。     

Grain dependence of ferroelectric domain switching on SrBi2Ta2O9 thin films observed by Kelvin probe force microscope

We have studied grain-shape dependence of Kelvin probe force microscopy of SrBi₂Ta₂O₉ thin films on epitaxial La_0.5Sr_0.5CoO₃/LaAlO₃ substrates. By changing the growth condition in pulsed laser deposition, we have grown the SrBi₂Ta₂O₉ thin films with various grain shapes. The shape and the orientation of SrBi₂Ta₂O₉ the thin films with various growth conditions have been analyzed by X-ray diffraction and scanning electron microscope. The large number of the long rectangular grains was observed accompanied with relatively larger (220) peaks than other peaks. From the Kelvin probe force microscope study, it has been observed that the long rectangular grains showed characteristics of easy ferroelectric domain switching at a low writing bias and weaker influence of surface charges.     

Quantitative characterization of nanoprecipitates in irradiated low-alloy steels: advances in the application of FEG-STEM quantitative microanalysis to real materials

The characterization of the solute-enriched features (clusters or nanoprecipitates in irradiated low-alloy steels) requires extremely high spatial and elemental resolution, previously necessitating analysis using atom probe field-ion microscopy. In this investigation, field-emission gun-scanning transmission electron microscope (FEG-STEM) quantitative energy dispersive X-ray (EDX) microanalysis (spectrum imaging) has been applied to the characterization of the irradiation-induced nanoprecipitates in a low-alloy forging steel. Refinements in the EDX data have been possible via the application of multivariate statistical analysis (MSA) to the spectrum images, resulting in significantly reduced noise in the images. Most importantly, MSA permitted the clear identification of other elements in these Ni-enriched nanoprecipitates—including Mn and Cu. The processed X-ray spectrum images also provided direct evidence of the preferential formation of these irradiation-induced features along pre-existing dislocations within the steel, as well as the formation of intragranular nanoprecipitates. This research has provided the first direct X-ray spectrum images of irradiation-induced nanoprecipitates in high Ni A508 Gr4N forging steel, and has demonstrated the significant improvements attainable though the application of MSA techniques to the spectrum images. These results independently confirmed the analyses of the Ni-enriched nanoprecipitates previously conducted by 3D-APFIM, with the performance of the FEG-STEM/EDX technique shown to be comparable to that of the 3D-APFIM technique.     

“瓦斯地质”探源

为使广大同人能够比较系统地了解“瓦斯地质”的由来和现状,进一步扩大瓦斯地质研究领域的影响,在资料的广泛收集和深入研究的基础上,就瓦斯地质概念的提出、瓦斯地质理论的形成和瓦斯地质学科的发展以及开展瓦斯地质研究的意义等问题提出了自己的一孔之见.阐述了以杨力生教授为代表的老一代煤矿安全学人在瓦斯地质概念的提出、理论的形成过程中所发挥的开拓、奠基作用;简要归纳了瓦斯地质的基本观点和理论;重点介绍了河南理工大学在瓦斯地质学科的学术团队建设、课程建设、教材建设和人才培养与培训等方面的现状和成就;扼要阐述了开展瓦斯地质研究的意义.     

高速大容量智能录波器的设计

介绍一种以高性能模拟微控制器ADuC812为核心的录波装置。该装置利用ADuC812片内A/D转换器及其DMA方式实现对模拟信号波形的采集和记录,并可将结果通过USB接口保存到外置USB存储设备或通过RS-232接口传送到PC机中进行分析处理。文中介绍了该装置的设计思想、硬件电路以及DMA方式A/D转换的基本步骤。     

邓小平的农业发展理念——“两个飞跃”思想探析

邓小平关于农业“两个飞跃”思想包含着丰富的精神内涵;其立论基础是“农业是根本”的思想;主旋律在于改革;立足点是为民谋利;发展目标是社会主义农业现代化;精髓是解放思想,实事求是。     

液力偶合器所用轴的超声波检测方法及双晶直探头的优化使用

介绍了在所选好的液力偶合器所用轴的超声波探伤方法以及双晶直探头的优化使用条件下,如何确保液力偶合器上轴的运行安全可靠,本文进一步证实了该方法是优质准确和高效的。