基于信息熵的配准方法研究

在数字图像处理过程中经常会用到图像配准,在所有的图像配准方法中基于信息熵的配准方法得到了广泛应用,它充分利用了图像的灰度信息具有配准速度快、精度高且不需要预处理的特点。文章讨论了基于信息熵的配准方法并用实验图像进行了配准实验,得到了不同配准测度的配准曲线。     

Deformation mechanism of high-stress and broken-expansion surrounding rock and supporting optimization based on the gray correlation theory

Aiming at the large deformation and support problems of high-stress and broken-expansion surrounding rock, and taking 1 000 m level roadway of Mine II in Jinchuan as the research object, an investigation on the deformation and damage of roadway surrounding rock and an analysis of its mechanism were carried out. The gray correlation theory was used in support scheme optimization design. First, causes and mechanism of deformation of the 1 000 m horizontal transport channel were analyzed through field investigation, laboratory test and data processing methods. We arguued that poor engineering geological conditions and deep pressure increases were the main factors, and the deformation mechanism was mainly the ground deformation pressure. Second, the gray correlation theory was used to construct supporting optimization decision method in the deep roadway. This method more comprehensively considers various factors, including construction, costs, and supporting material functions. The combined support with pre-stressed anchor cables, shotcrete layer, bolt and metal net was put forward according to the actual roadway engineering characteristics. Finally, 4 support schemes were put forward for new roadways. The gray relational theory was applied to optimizing the supporting method, undertaking technical and economic comparison to obtain the correlation degree, and accordingly the schemes were evaluated. It was concluded as follows： the best was the flexible retaining scheme using the steel strand anchor; the second best was the one using plate anchors on the top and rigid common screw steel bolt on the two sides; the ttiird was; the rigid common screw steel bolt in full section of roadway; and the worst is the planished steel rigid support. The optimized scheme was applied to the 1000 m level of new excavation roadway. The results show that the roadway surrounding rock can reach a stable state after 5 to 6 months monitoring, with a convergence rate less than 1 mm/d.     

西安市空气质量评价分析

针对西安市的环境质量问题,首先分析和对比空气污染指数(API)与环境质量指数(AQI)对西安市空气质量的影响.建立AQI与API比较模型,得到两种标准基本一致,但两个指标的值有所不同,因此得出需实施新标准的结论.其次分析影响西安市空气质量的原因.运用灰色关联度等方法,得出结论即工业污染为主要原因,其次是交通、生活污染.最后根据问题的分析和模型的求解结果,对环境空气质量的监测与控制对西安市环保部门提出均衡监测点的选取及其规模大小、环保部门应加强宣传力度、鼓励政府调整能源产业结构等具有建设性的意见.     

基于灰色关联度分析法的压缩机故障诊断研究

讨论了灰色关联度分析法在故障诊断中的应用,并提出了一种基于灰色关联度分析法的压缩机多参数故障诊断方法.诊断实例表明,将灰色关联度分析法引入压缩机故障诊断中是可行的,并且具有简单方便、计算量小、诊断结果可靠等特点.     

世界优秀男子十项全能运动员成绩表现特征及提高因素分析

运用文献资料调研和数理统计等方法,分析了当今世界优秀男子全能运动员的总成绩和各单项成绩,对优秀十项全能运动员的成绩表现特征和影响男子十项全能成绩提高的关键因素进行的阐述,旨在发现男子十项全能运动的发展及训练的规律,为我国十项全能训练的科学化和系统化提供理论依据。     

探索竞技体育领域灰色包络模型预测的新方法

介绍了灰色包络模型的建模机理及其理论缺陷。探索了在体育成绩预测中,通过历史最大浮动范围来确定上、下包络点的新方法,使灰色包络模型理论更科学、更准确地应用到竞技体育预测领域之中。     

蔗糖业供应链风险因素的识别与评价

风险因素的识别和评价是风险研究的重要阶段.借鉴国内外关于供应链风险影响因素的识别方法,根据蔗糖业供应链的特点,提出了影响蔗糖业供应链的风险因素.最后运用灰色关联法建立蔗糖业供应链风险因素评价模型,并通过实例证明此模型的可行性.     

改进的ASM灰度图像目标定位技术

首先介绍灰度模型的目标定位算法,在该算法基础上提出了一种改进的算法,将主动形状模型的灰度图像中目标定位算法应用到视频图像中,同时针对处理结果进行科学评价。实验结果证明了本文提出算法的可行性和高效性。     

基于灰色神经网络预测桥梁基桩混凝土自由收缩应变

桥梁基桩混凝土的自由收缩应变是基桩变形研究的一个重要方面,受多种因素影响,建立计算模型比较困难。本文在试验研究的基础上,利用灰色神经网络技术,在考虑多种影响因素的情况下,建立灰色神经网络模型预测基桩混凝土的自由收缩应变,从而降低了工程造价,同时还可以得到较满意的预测结果,为桥梁基桩混凝土自由收缩应变的研究提供了一种新方法和新思路,为工程实际应用提供了简便的预测方法,具有重要意义。     

基于灰色理论的社会保障信息网站评价

社会保障信息网站的评价,由于受到主观的、非确定性因素的影响,而具有灰色系统的相应特征.在分析社会保障信息网站特点的基础上,建立了社会保障信息网站的三维评价指标体系,应用灰色理论,结合层次分析法,对我国社会保障信息网站进行了综合评价.根据评价的结果,指出了社会保障信息平台建设中存在的问题,并提出了改进的建议.