The objective of this study is to develop an effective approach for product quality prediction in Computer Numerical Control turning of cantilever bars. A systematic predictive modelling procedure based on experimenta...The objective of this study is to develop an effective approach for product quality prediction in Computer Numerical Control turning of cantilever bars. A systematic predictive modelling procedure based on experimental investigations, neural network modelling and various statistical analysis tools is designed to produce the most accurate, practical and cost-effective prediction model. The modeling procedure begins by exploring the relationships between cutting parameters known to have an influence on quality characteristics of machined parts, such as dimensional errors, form errors and surface roughness, as well as their sensitivity to the process conditions. Based on these explorations and using numerous statistical tools, the most relevant variables to include in the prediction model are identified and fused using several artificial neural network architectures. An application on CNC turning of cantilever bars demonstrates that the proposed modeling procedure can be effectively and advantageously applied to quality characteristics prediction due to its simplicity, accuracy and efficiency. The experimental validation reveals that the resulting prediction model can correctly predict the quality characteristics of machined parts under variable machining conditions.展开更多
The paper firstly discussed the strategic implication of the establishment of China Xinhua News Network Co. Ltd. (referred to as CNC in the paper). Then, the paper explored the opportunity and threat in the CNC's c...The paper firstly discussed the strategic implication of the establishment of China Xinhua News Network Co. Ltd. (referred to as CNC in the paper). Then, the paper explored the opportunity and threat in the CNC's competitive environment, and evaluated the news TV competitiveness of CNC compared with world main news network media based on Delphi method. Based on the strategic management framework of SWOT (strength, weakness, opportunity, and threat), the paper proposed the developmental strategies of transnational business operation for CNC from the following three area: further expand the coverage and the number of countries entered by CNC, enhance brand effects across the world, and build more new technology experience in the world.展开更多
文摘The objective of this study is to develop an effective approach for product quality prediction in Computer Numerical Control turning of cantilever bars. A systematic predictive modelling procedure based on experimental investigations, neural network modelling and various statistical analysis tools is designed to produce the most accurate, practical and cost-effective prediction model. The modeling procedure begins by exploring the relationships between cutting parameters known to have an influence on quality characteristics of machined parts, such as dimensional errors, form errors and surface roughness, as well as their sensitivity to the process conditions. Based on these explorations and using numerous statistical tools, the most relevant variables to include in the prediction model are identified and fused using several artificial neural network architectures. An application on CNC turning of cantilever bars demonstrates that the proposed modeling procedure can be effectively and advantageously applied to quality characteristics prediction due to its simplicity, accuracy and efficiency. The experimental validation reveals that the resulting prediction model can correctly predict the quality characteristics of machined parts under variable machining conditions.
文摘The paper firstly discussed the strategic implication of the establishment of China Xinhua News Network Co. Ltd. (referred to as CNC in the paper). Then, the paper explored the opportunity and threat in the CNC's competitive environment, and evaluated the news TV competitiveness of CNC compared with world main news network media based on Delphi method. Based on the strategic management framework of SWOT (strength, weakness, opportunity, and threat), the paper proposed the developmental strategies of transnational business operation for CNC from the following three area: further expand the coverage and the number of countries entered by CNC, enhance brand effects across the world, and build more new technology experience in the world.