期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
青少年网络模仿性暴力犯罪特点、成因及预防对策
1
作者 卢树强 《中小企业管理与科技》 2016年第31期65-66,共2页
伴随着信息科技的发展,网络世界对于青少年有着越来越大的吸引力,另外,青少年在这个年龄段有着强烈的模仿欲,因此许多青少年会沉溺于虚拟的网络游戏,甚至会在现实生活中把游戏中的暴力行为展现出来,导致犯罪。针对这一现象,我们通过几... 伴随着信息科技的发展,网络世界对于青少年有着越来越大的吸引力,另外,青少年在这个年龄段有着强烈的模仿欲,因此许多青少年会沉溺于虚拟的网络游戏,甚至会在现实生活中把游戏中的暴力行为展现出来,导致犯罪。针对这一现象,我们通过几个典型的案例,剖析了青少年网络模仿性暴力犯罪的形成原因、特点以及防范措施。 展开更多
关键词 网络游戏 网络模仿性 暴力犯罪
下载PDF
Fully Coupled Time-Domain Simulation of Dynamic Positioning Semi-Submersible Platform Using Dynamic Surface Control 被引量:1
2
作者 LIANG Haizhi LI Luyu OU Jinping 《Journal of Ocean University of China》 SCIE CAS 2014年第3期407-414,共8页
A fully coupled 6-degree-of-freedom nonlinear dynamic model is presented to analyze the dynamic response of a semi-submersible platform which is equipped with the dynamic positioning(DP) system. In the control force d... A fully coupled 6-degree-of-freedom nonlinear dynamic model is presented to analyze the dynamic response of a semi-submersible platform which is equipped with the dynamic positioning(DP) system. In the control force design, a dynamic model of reference linear drift frequency in the horizontal plane is introduced. The dynamic surface control(DSC) is used to design a control strategy for the DP. Compared with the traditional back-stepping methods, the dynamic surface control combined with radial basis function(RBF) neural networks(NNs) can avoid differentiating intermediate variables repeatedly in every design step due to the introduction of a first order filter. Low frequency motions obtained from total motions by a low pass filter are chosen to be the inputs for the RBF NNs which are used to approximate the low frequency wave force. Considering the propellers' wear and tear, the effect of filtering frequencies for the control force is discussed. Based on power consumptions and positioning requirements, the NN centers are determined. Moreover, the RBF NNs used to approximate the total wave force are built to monitor the disturbances. With the DP assistance, the results of fully coupled dynamic response simulations are given to illustrate the effectiveness of the proposed control strategy. 展开更多
关键词 dynamic positioning system coupled analysis dynamic surface control RBF NNs adaptive control
下载PDF
Microscopic Fuzzy Urban Traffic Simulation with Variable Demand
3
作者 Masashi Okushima Takamasa Akiyama Madhu Errampalli 《Journal of Civil Engineering and Architecture》 2012年第5期541-556,共16页
Some microscopic traffic simulations on urban road network are developed up to now. However, the effect of urban transport policy in the local city is influenced with the complex interaction of automobile traffic and ... Some microscopic traffic simulations on urban road network are developed up to now. However, the effect of urban transport policy in the local city is influenced with the complex interaction of automobile traffic and public transport traffic. Particularly, behaviours of vehicles should be described with the fuzziness of the subjective recognition and operation. On the other hand, the trip makers are influenced by various transport policies in terms of mode choice behaviour. The change in mode choice behaviour and number of public transport mode users would eventually affect traffic flow conditions on road network. Modal spilt and traffic conditions of a network are interrelated. Therefore, the present study mainly aims to integrate mode choice model and microscopic traffic simulation model based on fuzzy logic. In the study, the fuzzy logic based mode choice model is proposed. The proposed mode choice model and the existing microscopic traffic simulation model are combined. The developed model has been applied on real urban network to demonstrate the effectiveness of the installation of LRT system. Finally, it is helpful for evaluation of transport policy that the fuzzy logic based microscopic traffic simulation with modal choice model has been constructed. 展开更多
关键词 Microscopic traffic simulation mode choice fuzzy reasoning LRT.
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部