For phase space reconstruction of ship - radiated noise , using auto correlation function and mutual information to select the delay - time , and using false nearest neighbors method to select the embedding dimension 从自相关函数及互信息嫡两个方面讨论了相空间重构中延迟时间的选择。
In order to reduce the disadvantageous influence of decision profiles ' scattering on fusion recognition , the decision profile is taken as target ' s feature vector and k - nearest neighbor method is applied to classify the target 为减少目标决策分布图散布对融合识别效果的影响,提出采用k近邻方法对目标的决策分布图进行分类,以实现融合识别。
This paper uses kriging method to estimate rainfall in drainage basin , gives the results of kriging interpolation method , and compares it with inverse distance square method and nearest neighbor method 为此,尝试采用克里格方法对流域雨量进行估值,并分别将年平均、月平均、时段雨量的插值结果与距离反比法以及最临近法的插值结果进行了对比性检验。
The minimum embedding dimension can be determined by the false nearest neighbors method , and embedding dimension of determination component in noise condition can be determined precisely by this method which can avoid the phase space disturbance because of the higher embedding dimensions 采用伪最邻近点法确定最小嵌入维数,这种方法可以准确地确定含噪信号中确定性成分的最小嵌入维数,避免嵌入维数过高导致相空间的混乱。
A variety of methods including the tabular comparison of data , the tabular comparison of similarity coefficient , the nearest neighbor method and the group - average method of hierarchical agglomerative classification were applied to investigate the forest communities in meizi lake area 森林植被样地中以乔木层树种的重要值为指标,采用纸条排队法、群落相似系数分类法、最近邻体法、组平均法对梅子湖森林植被样地进行数量分类。
Then , because of the characteristic of complex engineering systems like fighters , such as modeling difficulty , multiplicity work situations , difficulty and expensiveness for test , a new kind of fast fault predictor is designed based on an improved k - nearest neighbor method , which neither need math model of system nor need data for train and knowledge 其次,针对歼击机等复杂工程系统建模困难、工作情况多样、试验困难且代价高昂的特点,提出了一种改进k近邻密度估计方法,设计了一种完全既不需要系统数学模型也不需要故障训练数据和先验知识的实时故障预报器。
This recognition method integrates traits of nearest neighbor method and k - neighbor method . its basic principle is to improve recognition reliability with tow additive thresholds . in addition , ternary threshold neighbor recognition method ’ s fast arithmetic based on c - average clustering and huffman tree is put forward 2 .本文在经典统计模式识别方法的基础上,结合了最近邻识别法和k近邻识别法的特点,给出一种三阈值近邻识别方法,其基本原则是在寻找未知样本的近邻时,通过附加阈值的限制,进一步提高识别的可靠性。