particle n. 1.颗粒,微粒;微量,极少量。 2.【物、数】粒子,质点。 3.【语法】虚词,不变词〔冠词、副词、介词、连接词、感叹词等〕;小品词 〔yes, no 等〕,词缀。 4.〔古语〕(文件中的)条,项。 5.【天主教】一小片圣饼。 He has not a particle of sense. 他一点脑子也没有。 fundamental [elementary] particles 【物理学】基本质点,基本粒子。
Agglomerate particle was put into the fluidization bed to simulate the agglomeration malfunction . it was found that the hurst exponent decreased when the malfunction happened 对结块前后的压力波动信号进行r s分析后发现,颗粒结块使得信号的hurst指数值明显降低。
Compared with the method of adding nano - particles during dissolving stage , by the method of adding nano - particles during extracting stage , there have no big agglomerated particles in fibers owing to the limit of pole size in uhmwpe gel fiber 与溶解阶段加入纳米粒子相比,在萃取阶段加入纳米粒子,由于uhmwpe冻胶纤维内微孔尺寸的限制,纤维内没有较大尺寸的纳米粒子团聚体存在。
The results show that the dispersibility of nono - particles become excellent after treated with 3wt % coupling agent of titanic ester , the average dimension of treated nono - particles in uhmwpe fibers is about 50nm , and no big agglomerated particles occur in it 实验表明经过3wt钛酸酯偶联剂处理的纳米粒子的分散性最佳,处理后纳米粒子在uhmwpe纤维基体中的平均尺寸为50nm左右,基本没有大的团聚体存在。
In this paper , the contrast of original image is enhanced by nonlinear transformation based on the characteristics of grain image ; after comparing several methods of threshold segmentation and analyzing their performance and applicability on grain image , the adaptive threshold segmentation based on gradient image is presented ; the noise of binary image is reduced with morphological filter , the hollow in binary image is filled in and a recognition algorithm is designed to remove agglomerate particle ; on the basis of mathematical morphology two methods are adopted to segment agglomerate grains that are not agglomerated tightly ; the parameters of size and shape , perimeter , area , diameter , complexlity , longest feret diameter , shortest feret diameter etc , are extracted . this technique is applied in measurement of pearl powder ' s particle size 本文根据粒度图像的特点,采用非线性对比度增强处理改善颗粒显微图像的对比度;对多种阈值分割方法进行比较,分析了它们的性能和用于粒度图像的适用性,在此基础上提出了一种基于梯度图像的动态阈值分割方法;对获取的颗粒二值图像进行形态滤波和空洞填充,设计了识别算法去除凝聚体;对重叠不太严重的粘结颗粒采用了两种基于数学形态学的分割算法;提取了周长、面积、粒径、复杂度、最长feret径、最短feret径等大小和形状特征参数,对珍珠粉等粉体粒度进行了测量。