Colorimetric artificial nose for identification of Chinese liquor with different geographic origins

Colorimetric artificial nose was used to characterize and identify Chinese liquors from six different geographic origins. Using chemical dyes as the sensing elements, the developed colorimetric artificial nose showed a unique pattern of color changes upon its exposure to Chinese liquors. Data analysis was performed by chemometric techniques: Hierarchical cluster analysis (HCA), principal component analysis (PCA) and linear discriminant analysis (LDA). Each category of Chinese liquor could cluster together in PCA score plot. No errors in classification by HCA were observed in 45 trials. LDA model showed a 100% of prediction ability for Chinese liquor. The results demonstrated that colorimetric artificial nose was able to classify Chinese liquors from different geographic origins.     

立井联合法施工导孔堵孔问题的处理与实践

针对西山矿区安家沟进风井采用立井联合法施工时导孔堵塞问题,分析了导孔堵塞的主要原因,提出了解决方案,并进行实践,取得了良好的技术经济效益.     

疲劳试验机控制器研究

在动态试验技术迅速发展的今天,提出了PC机作为系统控制器的方案。针对系统特点提出的实用控制算法,在实际应用中取得了良好的效果。     

Analysis of photonic crystals using the hybrid finite‐element/finite‐difference time domain technique based on the discontinuous Galerkin method

Two‐dimensional photonic crystal structures are analyzed by a recently developed hybrid technique combining the finite‐element time‐domain (FETD) method and the finite‐difference time‐domain (FDTD) method. This hybrid FETD/FDTD method uses the discontinuous Galerkin method as framework for domain decomposition. To the best of our knowledge, this is the first hybrid FETD/FDTD method that allows non‐conformal meshes between different FETD and FDTD subdomains. It is also highly parallelizable. These properties are very suitable for the computation of periodic structures with curved surfaces. Numerical examples for the computation of the scattering parameters of two‐dimensional photonic bandgap structures are presented as applications of the hybrid FETD/FDTD method. Numerical results demonstrate the efficiency and accuracy of the proposed hybrid method. Copyright © 2012 John Wiley & Sons, Ltd.     

疏水扩容器用多级降压装置的设计

随着火电机组不断发展,超临界、超超临界锅炉配套的锅炉启动疏水扩容器也随之产生。通过理论计算设置合理的结构,设计一个多级节流孔管装置对高压流体进行降压,使得高压力的流体降至一个扩容器可以接受的压力后进行闪蒸排放,防止设备瞬间超压,产生不安全因素。     

瓷绝缘子振动声学检测技术及应用

介绍和比较目前瓷绝缘子各种检测方法,结合振动声学原理,提出瓷绝缘子振动声学检测系统,分析该系统的组成、检测方法和声波检测方法在检侧部位、检出率、带电检测、检测时间、操作难易度等方面的技术特点和优势,并通过河北省南部电网瓷绝缘子检测实例的应用,证明该方法检测效果良好,具有很好的推广价值,同时可以为瓷绝缘子缺陷检测的后续分析研究提供借鉴。     

高速信号采集记录仪设计

针对高速信号实时采集存储的需求,设计了一种高速信号采集记录仪。记录仪通过高速A/D转换器对信号进行采样,并实时存入NAND FLASH存储阵列中。为提高数据存储速率,综合采用并行总线、交错双平面页编程、多级流水线等技术,大幅提升FLASH的写入速度。记录仪可实现8bit、200MSPS的采样速率,并可将速率为200MB/s的采样数据实时存储。     

基于PGIS平台的定点全景地图建库技术研究

随着GIS技术的飞速发展,全景地图已成为地理信息系统中重要的组成部分.本文通过对PGIS平台现有数据进行分析,利用全景技术对PGIS平台数据库进行改造,实现了PGIS平台下全景地图数据库模型.在此基础上,提出了一套定点全景地图的建库技术流程,探讨了建库流程中的关键技术,并结合实际应用,验证了建库技术的合理性和可操作性.通过本文对定点全景地图建库技术的研究,可为各地警用业务管理提供更为直观、立体、现实的数据支撑.     

蚌埠市生活垃圾填埋场工程地质勘察

蚌埠市生活垃圾填埋场工程是城市基础设施,该工程规模大,位于平山半山坡上,工程区地质条件复杂,工作难度大,防渗设计要求严苛.本勘察项目采用钻探、原位取土试样、标准贯入试验、单孔法波速测试试验、室内土工试验、岩石饱和单轴抗压强度试验、水质分析等综合手段勘察,取得了科学准确的参数.本文对填埋场的地基持力层的选择、设计参数、防渗处理等提出了经济合理的结论和建议,为优化设计、节省投资、安全施工奠定了基础.