Real-Time anomaly detection is currently a hot topic in the area of network security research. In this paper, we firstly introduce the average length of data message as the measurement of abnormal behavior, and then a...
详细信息
ISBN:
(纸本)9781457715846
Real-Time anomaly detection is currently a hot topic in the area of network security research. In this paper, we firstly introduce the average length of data message as the measurement of abnormal behavior, and then advance a model of sampling measurement, in which the stratified sampling algorithm based on content trigger is utilized to select the bits in the IP packet identification field as the sampling and mask's length and contents. The comparison between statistic characters of total messages traffic and the samples in a large-scale network decides whether the samples are precise and efficient. Based on statistic characters of the samples and examination theory of hypothesis, real-time anomaly detection model is built. Lastly, average length of network data packets is defined to be the measurement of network behavior, and then we successfully realize the real time detection of distributed denial of service attack of network. Methods and ideas in this paper could provide some meaningful advice for other network security detection researches.
The design strategies of virtual learning comm unity are discussed based on the analysis of present situation of college PE theory teaching. It proved necessary and probability to set up the virtual learning community...
详细信息
ISBN:
(纸本)9781457715846
The design strategies of virtual learning comm unity are discussed based on the analysis of present situation of college PE theory teaching. It proved necessary and probability to set up the virtual learning community for theory teaching and learning. The steps, factors and design strategies are discussed as well..
Comparing to traditional mechanical hydraulic steering, electric power steering system has the advantages of high efficiency, fast reaction velocity, safety and pollution free, although DC servo motor is generally ado...
详细信息
ISBN:
(纸本)9781457715846
Comparing to traditional mechanical hydraulic steering, electric power steering system has the advantages of high efficiency, fast reaction velocity, safety and pollution free, although DC servo motor is generally adopted at present. This work proposes experiment and MATLAB simulation of electric power steering system based on permanent magnet AC servo motor, to prove that permanent magnet AC servo motor can be used in electric power steering system, and has immense superiority and development potential.
In order to make the target's motion model more reasonably so as to improve detection probability of subsequent search action, according to different situations about whether target takes countermeasure or not, th...
详细信息
ISBN:
(纸本)9781457715846
In order to make the target's motion model more reasonably so as to improve detection probability of subsequent search action, according to different situations about whether target takes countermeasure or not, the target's motion can divide into three kinds, no countermeasure, countermeasure and uncertain information. Secondly, the forecast method of target's future position distribution based on three motions is explained respectively. Then, the motion model is proved validity by using simulation at last. This method will be worthful for the search tactics study to a certain extent.
With the coming of the infonnation age, all kinds of high-techniques, such as computer science and network techniques are widely used in different fields of the society which not only have made great economic and soci...
详细信息
ISBN:
(纸本)9781457715846
With the coming of the infonnation age, all kinds of high-techniques, such as computer science and network techniques are widely used in different fields of the society which not only have made great economic and social benefits, but also have promoted the rapid development in culture and techniques. While the openness and flexibility of computer network brought us a lot of benefit both in life and in work, it also caused a series of infonnation security problems which put our life into danger. The thesis aims to analyze the nature of computer network security and the major factors that influence the network security, probe the existing problems and possible threats of the network system and work out an effective security precaution strategy. The analysis and strategy are quite useful for establish a safe, efficient and convenient network environment. Besides, they can strengthen the awareness of safety operation and improve the actual application. So they are of great value both in theory and practice.
暂无评论