基于Modbus现场总线的综采工作面大型设备监测监控系统

简要介绍了Modbus通讯协议,重点阐述了综采工作面大型设备实现远程监测监控功能的软硬件技术方案。在HT6L1-400Z/1140智能型组合电器的基础上采用Modbus现场总线,编制了通讯程序,实现了综采工作面大型设备的远程监测监控。     

π放面机道用凝胶防灭火的实践

鹤岗矿业集团公司大陆煤矿在-275南11层零区回掘期间,应用新型凝胶防灭火工艺,成功地完成了回采任务,有效地消灭了煤层发火,保证了正常生产。     

Application of material strength reserve method to the stability analysis of earth dam of feilaixia multipurpose project

The material strength reserve method is practical in the study of the stability and failure mechanism of earth dam by analysing the development of failure zone of different shear strength parameters of the earth mass of the dam. The stability in the concrete dam and ensemble architecture has got general application while analysing. In combination with Feilaixia Multipurpose Project, application of this method to earth dam stability analysis was studied by plane Finite Element Method（FEM） for the first time. Through plane FEM, we can get the failure mechanism of earth dam and appraise to the security, for operating and managing put forward some reference suggestions.     

Constructing Facial Identity Surfaces for Recognition

We present a novel approach to face recognition by constructing facial identity structures across views and over time, referred to as identity surfaces, in a Kernel Discriminant Analysis (KDA) feature space. This approach is aimed at addressing three challenging problems in face recognition: modelling faces across multiple views, extracting non-linear discriminatory features, and recognising faces over time. First, a multi-view face model is designed which can be automatically fitted to face images and sequences to extract the normalised facial texture patterns. This model is capable of dealing with faces with large pose variation. Second, KDA is developed to compute the most significant non-linear basis vectors with the intention of maximising the between-class variance and minimising the within-class variance. We applied KDA to the problem of multi-view face recognition, and a significant improvement has been achieved in reliability and accuracy. Third, identity surfaces are constructed in a pose-parameterised discriminatory feature space. Dynamic face recognition is then performed by matching the object trajectory computed from a video input and model trajectories constructed on the identity surfaces. These two types of trajectories encode the spatio-temporal dynamics of moving faces.     

高寒地区碾压混凝土拱坝施工技术

介绍了在高寒地区的新疆石门子水库碾压混凝土拱坝,在恶劣气候条件下的施工技术及冻融保护措施。     

论泾河东庄水库灰岩坝址渗漏问题

通过对泾河东庄水库灰岩坝址工程地质钻探成果特别是钻孔压水试验及水文地质成果包括区域水质、水位、水温等不连通性的分析研究,并结合流量测定三维渗漏数值模拟分析,对坝区渗漏问题进行分析和论证,进一步证明在泾河下游东庄灰岩段建坝是可行的,不会发生严重渗漏,为项目的设计、审查、决策方面参考,以促进工程前期工作的进展。     

蜗壳座环与混凝土基础联合受力应力分析研究

本文根据蜗壳、座环应力计算和实测资料,进行了系统而大量的有限元分析,得出了符合实际情况的力学模型,提高了计算精度,满足了大型机组的设计要求。又在深入研究一些主要因素相互影响的基础上,提出了大型水电机组有关构件联合承载的新建议。     

AFRP筋混凝土粘结强度和锚固长度的试验研究

通过对27个拉拔试件和16个梁式试件的试验,探讨AFRP筋与混凝土的粘结滑移关系、粘结强度,并且综合分析其他文献的结果,提出简化的局部粘结滑移本构关系和拔出破坏模式下锚固长度的计算公式。     

对ORL人脸数据库识别过程中的参数选择策略

对ORL人脸数据库的识别大致分为两步骤:使用PCA对训练集降维提取特征向量和使用KNN对样本集进行分类。在该过程中,有两个参数直接影响着人脸识别的准确率:PCA选取的特征向量数目n和KNN中的k值。如果对它们的选取没有一个良好的策略,就会出现正确率太低、时间复杂度太高、过拟合等问题。文章采用状态空间搜索找到准确率与时间复杂度中的平衡点,得到了有效的搜索结果。     

混凝土喷射机出料管防粘结措施研究

利用有限元分析软件ANSYS对湿式混凝土喷射机关键零件出料管进行了结构动力学分析,计算了出料管的固有频率及振型,通过对结果的分析提出了出料管防粘结方法和措施,对实际中解决出料管粘料问题具有一定的理论研究和参考价值.