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1.
基于模糊连接度的图像分割及算法   总被引:18,自引:0,他引:18       下载免费PDF全文
提出了一种基于模糊连接度图像分割的方法,在模糊连接度分割的基础上增加了最优路径(即与种子点的所有路径中连接度最大的路径)上各点相对于种子点的属性相似度的检验,使之能在待分割对象边界比较模糊的情况下取得理想的分割结果.同时提出了一种基于图像扫描机制的算法,它以种子点为中心,逐个计算邻居点相对于种子点的模糊连接度,该算法充分利用模糊连接度和属性相似度的性质,能简单、快速地找到两点间的最优路径.实验结果表明,该方法快速、有效地提高了图像分割的质量.  相似文献
2.
FUZZY控制理论在水泥机立窑煅烧过程的应用   总被引:10,自引:1,他引:9       下载免费PDF全文
针对水泥机立窑数学模型过于复杂且难以建立的特点,提出了以稳定底火为目标的 微机模糊控制方案.对立窑底火进行了系统划分,给出了底火状态的模糊定义,并提出了一种 多变量多级混合模型的识别方法.在总结人工操作经验的基础上经优化处理制定了稳定底火 的模糊控制规则.为了简化计算过程,采用一种简单实用的模糊推理合成算法.计算机控制系 统的实际运行表明了该控制方案的正确性和实用性.  相似文献
3.
针对DCRI模糊推理方法的复杂性,首先提出了作用模糊子集推理方法;然后将该推理方法与单片机数字运算少年叮结合,提出了基于作用模糊子集推理的单片机模糊控制实现原理,研制了开发了80C552型单片机模糊控制器;最后以建筑热工系统为被控对象,试验研究了测试室温度模糊控制过程。  相似文献
4.
本文基于Fuzzy集合理论,根据待辨识系统的量测数据,应用Fuzzy推理合成规则,提出建立系统Fuzzy模型的新方法,通过建立水泥回转窑热工过程Fuzzy模型,证实了该方法的可行性.  相似文献
5.
本文基于Fuzzy集合理论,根据待辨识系统的量测数据,应用Fuzzy推理合成规则,提 出建立系统Fuzzy模型的新方法,通过建立水泥回转窑热工过程Fuzzy模型,证实了该方 法的可行性.  相似文献
6.
基于模糊逻辑控制的单脉冲雷达测距算法改进   总被引:1,自引:0,他引:1  
针对某型号雷达在对飞行器的初始段跟踪测量过程中,由于受地杂波影响较大,存在跟踪稳定性较差、测距精度偏低的问题,提出对雷达测距跟踪环路采用模糊自适应扩展Kalman滤波取代模糊自适应常规Kalman滤波的方法.方法主要是通过引进估计误差方差阵的加权系数α,通过在滤波过程中对系数α进行"在线"调整,来实现对滤波器噪声方差阵的实时调整,从而优化了滤波器执行最优估计的性能,达到了增强雷达设备跟踪稳定性和提高测距精度的目的.仿真结果表明,该模糊自适应扩展Kalman滤波器跟踪目标稳定性和精度高于模糊自适应常规Kalnum滤波器.  相似文献
7.
This paper describes the theory and algorithms of distance transform for fuzzy subsets, called fuzzy distance transform (FDT). The notion of fuzzy distance is formulated by first defining the length of a path on a fuzzy subset and then finding the infimum of the lengths of all paths between two points. The length of a path π in a fuzzy subset of the n-dimensional continuous space n is defined as the integral of fuzzy membership values along π. Generally, there are infinitely many paths between any two points in a fuzzy subset and it is shown that the shortest one may not exist. The fuzzy distance between two points is defined as the infimum of the lengths of all paths between them. It is demonstrated that, unlike in hard convex sets, the shortest path (when it exists) between two points in a fuzzy convex subset is not necessarily a straight line segment. For any positive number θ≤1, the θ-support of a fuzzy subset is the set of all points in n with membership values greater than or equal to θ. It is shown that, for any fuzzy subset, for any nonzero θ≤1, fuzzy distance is a metric for the interior of its θ-support. It is also shown that, for any smooth fuzzy subset, fuzzy distance is a metric for the interior of its 0-support (referred to as support). FDT is defined as a process on a fuzzy subset that assigns to a point its fuzzy distance from the complement of the support. The theoretical framework of FDT in continuous space is extended to digital cubic spaces and it is shown that for any fuzzy digital object, fuzzy distance is a metric for the support of the object. A dynamic programming-based algorithm is presented for computing FDT of a fuzzy digital object. It is shown that the algorithm terminates in a finite number of steps and when it does so, it correctly computes FDT. Several potential applications of fuzzy distance transform in medical imaging are presented. Among these are the quantification of blood vessels and trabecular bone thickness in the regime of limited special resolution where these objects become fuzzy.  相似文献
8.
以往的冲击式钻井是凭人的感觉来判断钻具在井下的工作状况,容易失误而引发事故。所研制的微机控制冲击式钻机操作指导系统利用模糊控制原理,能对钻具的正常、绳松和空顿三种状态作出及时准确的判断,并指导司钻作相应的提绳和给进操作。还能对断钻头、断绳和卡钻三种故障进行检测和报警。  相似文献
9.
Trabecular bone (TB) is a network of interconnected struts and plates that constantly remodels to adapt dynamically to the stresses to which it is subjected in such a manner that the trabeculae are oriented along the major stress lines (Wolff's Law). Next to bone density, TB anisotropy has been found to be one of the most significant determinants of the bone's biomechanical behavior. Typically, orientational anisotropy of TB networks is expressed in terms of the fabric tensor, obtained by measuring the mean intercept length between structure elements along test lines. This method, however, can provide only a global statistical average of TB orientation anisotropy and, in general, requires a large sampling volume. Here, we present a new method, based on the recently conceived notion of “tensor scale”, which provides regional information of TB orientation anisotropy. Regional structure is represented by local best fit ellipsoid (ellipse in 2D) and the structural orientation is determined from the eigenvectors along the semi-axes. The method is found to be remarkably robust over a wide range of resolution regimes and image rotation as shown with micro-CT images from specimens of the human distal radius, the latter showing the characteristic differences in structural anisotropy for transverse and longitudinal sections. Finally, the method's applicability to in vivo MR imaging is demonstrated with data from the distal tibia.  相似文献
10.
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