期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
常用教学模式与策略的多维度分析
1
作者 康苇苇 余平 +1 位作者 杨有 韦迎春 《计算机教育》 2015年第9期92-95,共4页
选取具有代表性的教学模式与策略进行归纳总结,从活动对象、活动过程、资源条件三方面,从教师、学生、教学管理人员、教学目标、教学过程、教学效果、教学资源、支持条件八维度对九种教学模式与策略进行分析,以"计算思维概述"... 选取具有代表性的教学模式与策略进行归纳总结,从活动对象、活动过程、资源条件三方面,从教师、学生、教学管理人员、教学目标、教学过程、教学效果、教学资源、支持条件八维度对九种教学模式与策略进行分析,以"计算思维概述"知识点为例,说明该方法的运用。 展开更多
关键词 教学模式与策略 模式特征表 计算思维
下载PDF
Action recognition using a hierarchy of feature groups
2
作者 周同驰 程旭 +3 位作者 李拟珺 徐勤军 周琳 吴镇扬 《Journal of Southeast University(English Edition)》 EI CAS 2015年第3期327-332,共6页
To improve the recognition performance of video human actions,an approach that models the video actions in a hierarchical way is proposed. This hierarchical model summarizes the action contents with different spatio-t... To improve the recognition performance of video human actions,an approach that models the video actions in a hierarchical way is proposed. This hierarchical model summarizes the action contents with different spatio-temporal domains according to the properties of human body movement.First,the temporal gradient combined with the constraint of coherent motion pattern is utilized to extract stable and dense motion features that are viewed as point features,then the mean-shift clustering algorithm with the adaptive scale kernel is used to label these features.After pooling the features with the same label to generate part-based representation,the visual word responses within one large scale volume are collected as video object representation.On the benchmark KTH(Kungliga Tekniska H?gskolan)and UCF (University of Central Florida)-sports action datasets,the experimental results show that the proposed method enhances the representative and discriminative power of action features, and improves recognition rates.Compared with other related literature,the proposed method obtains superior performance. 展开更多
关键词 action recognition coherent motion pattern feature groups part-based representation
下载PDF
Automatically extracting sheet-metal features from solid model 被引量:3
3
作者 刘志坚 李建军 +2 位作者 王义林 李材元 肖祥芷 《Journal of Zhejiang University Science》 EI CSCD 2004年第11期1456-1465,共10页
With the development of modern industry, sheet-metal parts in mass production have been widely applied in mechanical, communication, electronics, and light industries in recent decades; but the advances in sheet-metal... With the development of modern industry, sheet-metal parts in mass production have been widely applied in mechanical, communication, electronics, and light industries in recent decades; but the advances in sheet-metal part design and manufacturing remain too slow compared with the increasing importance of sheet-metal parts in modern industry. This paper proposes a method for automatically extracting features from an arbitrary solid model of sheet-metal parts; whose characteristics are used for classification and graph-based representation of the sheet-metal features to extract the features embodied in a sheet-metal part. The extracting feature process can be divided for valid checking of the model geometry, feature matching, and feature relationship. Since the extracted features include abundant geometry and engineering information, they will be effective for downstream application such as feature rebuilding and stamping process planning. 展开更多
关键词 Sheet-metal part Feature extraction Feature representation
下载PDF
Solving Laguerre-Gauss Mode Eigenvectors and Eigenfunctions in Entangled State Representation
4
作者 FAN Hong-Yi GAO Wei-Bo 《Communications in Theoretical Physics》 SCIE CAS CSCD 2006年第4期617-620,共4页
We solve the Laguerre-Gauss mode eigenvectors and eigenfunctions in the entangled state representation by searching for common eigenvectors of the 2-dimensional harmonic oscillator's total energy operator and the ang... We solve the Laguerre-Gauss mode eigenvectors and eigenfunctions in the entangled state representation by searching for common eigenvectors of the 2-dimensional harmonic oscillator's total energy operator and the angular momentum operator, We find that in the entangled state representation the eigen-solution satisfies the Hukuhara equation, and its solution is confluent hypergeometric function. 展开更多
关键词 Laguerre-Gauss modes entangled state representation
下载PDF
Wear Debris Identification Using Feature Extraction and Neural Network
5
作者 王伟华 马艳艳 +1 位作者 殷勇辉 王成焘 《Journal of Donghua University(English Edition)》 EI CAS 2004年第4期42-45,共4页
A method and results of identification of wear debris using their morphological features are presented. The color images of wear debris were used as initial data. Each particle was characterized by a set of numerical ... A method and results of identification of wear debris using their morphological features are presented. The color images of wear debris were used as initial data. Each particle was characterized by a set of numerical parameters combined by its shape, color and surface texture features through a computer vision system. Those features were used as input vector of artificial neural network for wear debris identification. A radius basis function (RBF) network based model suitable for wear debris recognition was established, and its algorithm was presented in detail. Compared with traditional recognition methods, the RBF network model is faster in convergence, and higher in accuracy. 展开更多
关键词 wear debris CHARACTERIZATION neural network pattern recognition.
下载PDF
Information schema constructs for instantiation and composition of system manifestation features
6
作者 Shahab POURTALEBI Imre HORVATH 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2017年第9期1396-1415,共20页
Complementing our previous publications, this paper presents the information schema constructs (ISCs) that underpin the programming of specific system manifestation feature (SMF) orientated information management ... Complementing our previous publications, this paper presents the information schema constructs (ISCs) that underpin the programming of specific system manifestation feature (SMF) orientated information management and composing system models. First, we briefly present (1) the general process of pre-embodiment design with SMFs, (2) the procedures of creating genotypes and phenotypes of SMFs, (3) the specific procedure of instantiation of phenotypes of SMFs, and (4) the procedure of system model management and processing. Then, the chunks of information needed for instantiation of phenotypes of SMFs are discussed, and the ISCs designed for instantiation presented. Afterwards, the information management aspects of system modeling are addressed. Methodologically, system modeling involves (1) placement of phenotypes of SMF in the modeling space, (2) combining them towards the desired architecture and operation, (3) assigning values to the parameters and checking the satisfac- tion of constraints, and (4) storing the system model in the SMFs-based warehouse database. The final objective of the reported research is to develop an SMFs-based toolbox to support modeling of cyber-physical systems (CPSs). 展开更多
关键词 System manifestation features (SMFs) Information schema constructs Database schemata SMF genotypes SMFphenotypes SMF instances Soft'ware tool box System-level design Cyber-physieal systems
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部