To improve the accuracy of real-time public transport information release system, a collaborative prediction model was proposed based on cyber-physical systems architecture. In the model, the total bus travel time was...To improve the accuracy of real-time public transport information release system, a collaborative prediction model was proposed based on cyber-physical systems architecture. In the model, the total bus travel time was divided into three parts: running time, dwell time and intersection delay time, and the data were divided into three categories of historical data, static data and real-time data. The bus arrival time was obtained by fusion computing the real-time data in perception layer together with historical data and static data in collaborative layer. The validity of the collaborative model was verified by the data of a typical urban bus line in Shanghai, and 1538 sets of data were collected and analyzed from three different perspectives. By comparing the experimental results with the actual results, it is shown that the experimental results are with higher prediction accuracy, and the collaborative prediction model adopted is able to meet the demand for bus arrival prediction.展开更多
The combination of attacks and defects means that today's security problems involving computer and software are frequent,widespread and serious.Thus,producers can suffer serious costs and consequences,so the need ...The combination of attacks and defects means that today's security problems involving computer and software are frequent,widespread and serious.Thus,producers can suffer serious costs and consequences,so the need for a workforce more skilled in software security is clear.It is very important for us to teach students issues about secure software engineering.This paper provides some ideas from several aspects-security concepts,software security properties,secure software development activities,secure software project management and secure software sustainment which can be a guide for cultivating software talents.展开更多
By analyzing the working principle of Linux network device driver,discussing the Linux network driver structure and its key technologies,the general network driver structure and its design methodologies in Linux syste...By analyzing the working principle of Linux network device driver,discussing the Linux network driver structure and its key technologies,the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull.c and improving the COW technology,the Zero-Copy technology in Linux (kernel version 2.6.11) is implemented. In the end,the success test tells us that the thorough analysis of network device driver is the foundation of many applications,and it also provides a certain improvement to a lot of real applications,even to military application development.展开更多
基金Project(2011AA010101) supported by the National High Technology Research and Development Program of China
文摘To improve the accuracy of real-time public transport information release system, a collaborative prediction model was proposed based on cyber-physical systems architecture. In the model, the total bus travel time was divided into three parts: running time, dwell time and intersection delay time, and the data were divided into three categories of historical data, static data and real-time data. The bus arrival time was obtained by fusion computing the real-time data in perception layer together with historical data and static data in collaborative layer. The validity of the collaborative model was verified by the data of a typical urban bus line in Shanghai, and 1538 sets of data were collected and analyzed from three different perspectives. By comparing the experimental results with the actual results, it is shown that the experimental results are with higher prediction accuracy, and the collaborative prediction model adopted is able to meet the demand for bus arrival prediction.
文摘The combination of attacks and defects means that today's security problems involving computer and software are frequent,widespread and serious.Thus,producers can suffer serious costs and consequences,so the need for a workforce more skilled in software security is clear.It is very important for us to teach students issues about secure software engineering.This paper provides some ideas from several aspects-security concepts,software security properties,secure software development activities,secure software project management and secure software sustainment which can be a guide for cultivating software talents.
文摘By analyzing the working principle of Linux network device driver,discussing the Linux network driver structure and its key technologies,the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull.c and improving the COW technology,the Zero-Copy technology in Linux (kernel version 2.6.11) is implemented. In the end,the success test tells us that the thorough analysis of network device driver is the foundation of many applications,and it also provides a certain improvement to a lot of real applications,even to military application development.
