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网络与儿童表达
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作者 鲁旻 《素质教育大参考》 2004年第8期17-18,共2页
联合国《儿童权利公约》签署后10多年间,正逢有“第四媒体”之称的互联网蓬勃发展之际。网络以其独有的开放性、平等性、互动性、异质性,以及隐藏在互联网络中的某些不良因素,给儿童的思想观念、价值观念、行为方式等带来了相当的影... 联合国《儿童权利公约》签署后10多年间,正逢有“第四媒体”之称的互联网蓬勃发展之际。网络以其独有的开放性、平等性、互动性、异质性,以及隐藏在互联网络中的某些不良因素,给儿童的思想观念、价值观念、行为方式等带来了相当的影响与;中击。截至2003年6月30日,我国18岁以下的未成年网民将近1163万, 展开更多
关键词 网络 自由表达 中学生 信息流动状态 负面影响
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A Novel Mechanism for TRF of Plant-wide Material Flows in Process Industry MES
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作者 朱炜 朱峰 荣冈 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2014年第4期418-428,共11页
This paper is standing on the recent viewpoint originated from relevant industrial practices that well or-ganized tracing, representing and feedback(TRF) mechanism of material-flow information is crucial for system ut... This paper is standing on the recent viewpoint originated from relevant industrial practices that well or-ganized tracing, representing and feedback(TRF) mechanism of material-flow information is crucial for system utility and usability of manufacturing execution systems(MES), essentially, for activities on the side of multi-level decision making and optimization mainly in the planning and scheduling. In this paper, we investigate a key issue emphasized on a route of multi-level information evolution on the side of large-scale feedback, where material-flow states could evolve from the measuring data(local states) to networked event-type information cells(global states) and consequently to the key performance indicators(KPI) type information(gross states). Importantly, with adapta-bilities to frequent structural dynamics residing in running material flows, this evolving route should be modeled as a suit of sophisticated mechanism for large-scale dynamic states tracking and representing so as to upgrade accu-racy and usability of the feedback information in MES. To clarify inherent complexities of this evolving route, the investigated issue is demonstrated from extended process systems engineering(PSE) point of view, and the TRF principles of the multi-level feedback information(states) are highlighted under the multi-scale methodology. As the main contribution, a novel mechanism called TRF modeling mechanism is introduced. 展开更多
关键词 extended process systems engineering manufacturing execution systems material flow modeling method
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