共查询到10条相似文献,搜索用时 54 毫秒
1.
2.
目的 为了回收可用于不同物品包装的塑料,对不同塑料种类进行识别分类。方法 首先采集PP、PET、HDPE、TPE、PLA、PBT、TPU、POM-M90、PPO-GF20NC、TPB、PPS、ABS、PPO(natural)、SAN、POM-F20、PPO(white)16种塑料的近红外光谱数据,其次针对光谱数据采集时存在的噪声问题,使用SG平滑滤波进行了光谱数据预处理,之后利用主成分分析算法进行光谱数据降维,减少待处理数据量,最后分别运用无监督聚类K-means算法和监督聚类极大似然估计、Fisher判别式以及光谱角算法建立4类分类模型。结果 K-means算法可以将PPO-GF20N、PLA和PPO(本色)与其他塑料粒子区分开,准确率分别是100%、100%以及80%;Fisher判别式和极大似然估计法对POM-M90和POM-F20的识别准确率为93%,其他塑料粒子识别准确率均为100%;光谱角算法对PET的识别准确率为80%,POM-F20的识别准确率为47%,其余粒子的识别准确率均大于90%。结论 上述机器学习算法结合近红外光谱成像技术建立分类模型可为常见塑料的鉴别研究提供参考。 相似文献
3.
Guanghao Jin Chunmei Pei Na Zhao Hengguang Li Qingzeng Song Jing Yu 《计算机、材料和连续体(英文)》2022,73(3):5185-5196
When utilizing the deep learning models in some real applications, the distribution of the labels in the environment can be used to increase the accuracy. Generally, to compute this distribution, there should be the validation set that is labeled by the ground truths. On the other side, the dependency of ground truths limits the utilization of the distribution in various environments. In this paper, we carried out a novel system for the deep learning-based classification to solve this problem. Firstly, our system only uses one validation set with ground truths to compute some hyper parameters, which is named as one-shot guidance. Secondly, in an environment, our system builds the validation set and labels this by the prediction results, which does not need any guidance by the ground truths. Thirdly, the computed distribution of labels by the validation set selectively cooperates with the probability of labels by the output of models, which is to increase the accuracy of predict results on testing samples. We selected six popular deep learning models on three real datasets for the evaluation. The experimental results show that our system can achieve higher accuracy than state-of-art methods while reducing the dependency of labeled validation set. 相似文献
4.
5.
P. P. Lepikhin 《Strength of Materials》2006,38(5):506-514
The classification of the models of materials in continuum mechanics proposed by the author on the basis of the general theory
of Noll constitutive relations is developed by using the methods of rational continuum mechanics.
__________
Translated from Problemy Prochnosti, No. 5, pp. 79–89, September–October, 2006.
Report on International Conference “Dynamics, Strength, and Life of Machines and Structures” (1–4 November 2006, Kiev, Ukraine). 相似文献
6.
针对地震勘探中噪声压制的问题,构建了一种适合分类和识别地震子波的卷积神经网络模型.首先对卷积神经网络模型的激活函数、卷积核大小以及归一化层等进行了设计,然后利用已搭建好的卷积神经网络对地震信号的时频谱图进行特征提取,最后实现了不同类型的含噪地震信号的分类和识别.实验结果表明,该模型有高分类率和识别率及较好的抗干扰能力,... 相似文献
7.
医疗服务标准化及其分类问题研究 总被引:2,自引:0,他引:2
分析服务业标准化的总体趋势及我国服务标准化的发展现状,提出了医疗服务标准化的必要性,在阐述医疗服务标准化涵义的基础上,分别从以质量标准化为核心、标准化管理的对象以及标准化表现形式三个不同角度,探讨了医疗服务标准化的不同分类问题. 相似文献
8.
本文为系列文章的第3部分.主要介绍了美国密歇根州立大学包装学院的工厂实习与毕业设计特点. 相似文献
9.