This paper describes the self—adjustment of some tuning-knobs of the generalized predictive controller(GPC).A three feedforward neural network was utilized to on line learn two key tuning-knobs of GPC,and BP algorith...This paper describes the self—adjustment of some tuning-knobs of the generalized predictive controller(GPC).A three feedforward neural network was utilized to on line learn two key tuning-knobs of GPC,and BP algorithm was used for the training of the linking-weights of the neural network.Hence it gets rid of the difficulty of choosing these tuning-knobs manually and provides easier condition for the wide applications of GPC on industrial plants.Simulation results illustrated the effectiveness of the method.展开更多
The relation between structures and properties of polyurethane are investigated by modern physical and chemical methods.The results obtained are as follows:the effects of the content of self-crosslinking agent on the ...The relation between structures and properties of polyurethane are investigated by modern physical and chemical methods.The results obtained are as follows:the effects of the content of self-crosslinking agent on the properties of polyurethane,i.e.,dispersion stability,dynamical viscoelasticity and mechanical properties are discussed.It is found that the optimum molar ratio of epichlorohydrin and diethylenetriamine is 1:2.A mois-展开更多
The Belt and Road Initiative contains the aspiration of Chinese nation to pursue ideological freedom and desire of strengthening international exchanges and cooperation. This paper takes the Belt and Road Initiative f...The Belt and Road Initiative contains the aspiration of Chinese nation to pursue ideological freedom and desire of strengthening international exchanges and cooperation. This paper takes the Belt and Road Initiative for example,emphasizing the interpretation of the inheritance and development of Chinese culture so as to study the importance of Culture Self-Consciousness in Chinese Philosophy,in the context of English globalization. That is to say,this paper stresses the spirits and the stand of nation 's demonstration on pursuing peace,cooperation and sustainable development in the civilization continuity from traditional China to the contemporary China,with practical philosophic view.展开更多
作为云存储安全的重要问题,数据完整性验证技术受到学术界和工业界的广泛关注.为了验证云端数据完整性,研究者提出了多个数据完整性公开审计模型.然而,现有的数据完整性审计模型采用固定参数审计所有文件,浪费了大量计算资源,导致系统...作为云存储安全的重要问题,数据完整性验证技术受到学术界和工业界的广泛关注.为了验证云端数据完整性,研究者提出了多个数据完整性公开审计模型.然而,现有的数据完整性审计模型采用固定参数审计所有文件,浪费了大量计算资源,导致系统审计效率不高.为了提高系统的审计效率,提出了一种自适应数据持有性证明方法(self-adaptive provable data possession,SA-PDP),该方法基于文件属性和用户需求动态调整文件的审计方案,使得文件的审计需求和审计方案的执行强度高度匹配.为了增强审计方案更新的灵活性,依据不同的审计需求发起者,设计了2种审计方案动态更新算法.主动更新算法保证了审计系统的覆盖率,而被动更新算法能够及时满足文件的审计需求.实验结果表明:相较于传统方法,SA-PDP的审计总执行时间至少减少了50%,有效增加了系统审计文件的数量.此外,SAPDP方法生成的审计方案的达标率比传统审计方法提高了30%.展开更多
基金Supported by the National 863 CIMS Project Foundation(863-511-010)Tianjin Natural Science Foundation(983602011)Backbone Young Teacher Project Foundation of Ministry of Education
文摘This paper describes the self—adjustment of some tuning-knobs of the generalized predictive controller(GPC).A three feedforward neural network was utilized to on line learn two key tuning-knobs of GPC,and BP algorithm was used for the training of the linking-weights of the neural network.Hence it gets rid of the difficulty of choosing these tuning-knobs manually and provides easier condition for the wide applications of GPC on industrial plants.Simulation results illustrated the effectiveness of the method.
文摘The relation between structures and properties of polyurethane are investigated by modern physical and chemical methods.The results obtained are as follows:the effects of the content of self-crosslinking agent on the properties of polyurethane,i.e.,dispersion stability,dynamical viscoelasticity and mechanical properties are discussed.It is found that the optimum molar ratio of epichlorohydrin and diethylenetriamine is 1:2.A mois-
文摘The Belt and Road Initiative contains the aspiration of Chinese nation to pursue ideological freedom and desire of strengthening international exchanges and cooperation. This paper takes the Belt and Road Initiative for example,emphasizing the interpretation of the inheritance and development of Chinese culture so as to study the importance of Culture Self-Consciousness in Chinese Philosophy,in the context of English globalization. That is to say,this paper stresses the spirits and the stand of nation 's demonstration on pursuing peace,cooperation and sustainable development in the civilization continuity from traditional China to the contemporary China,with practical philosophic view.
文摘作为云存储安全的重要问题,数据完整性验证技术受到学术界和工业界的广泛关注.为了验证云端数据完整性,研究者提出了多个数据完整性公开审计模型.然而,现有的数据完整性审计模型采用固定参数审计所有文件,浪费了大量计算资源,导致系统审计效率不高.为了提高系统的审计效率,提出了一种自适应数据持有性证明方法(self-adaptive provable data possession,SA-PDP),该方法基于文件属性和用户需求动态调整文件的审计方案,使得文件的审计需求和审计方案的执行强度高度匹配.为了增强审计方案更新的灵活性,依据不同的审计需求发起者,设计了2种审计方案动态更新算法.主动更新算法保证了审计系统的覆盖率,而被动更新算法能够及时满足文件的审计需求.实验结果表明:相较于传统方法,SA-PDP的审计总执行时间至少减少了50%,有效增加了系统审计文件的数量.此外,SAPDP方法生成的审计方案的达标率比传统审计方法提高了30%.
