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With the vast resource and techniques increasingly available to attackers, application layer DDoS (App-DDoS) attacks have become a serious threat to webserver. In order to deal with this kind of complex and varied attacks, a novel approach based on time series prediction model is proposed, which includes the following work: Firstly, App-DDoS attacks are divided into flooding attacks and asymmetric...
ith the wide deployment of various kinds of sensors in fixed infrastructures and in mobile devices, technologies and applications of crowd-sensing has drawn attentions in the fields of mobile computing. This paper studies the design of frameworks for crowd-sensing process in a distributed environment. We discuss the realization of the compatibilities of devices and services, as well as the algorithms...
Application layer Distributed Denial of Service (DDoS) attacks, which are legitimate in packets and protocols, gradually become a pressing problem to the current network. How to effectively resist this type of attack is becoming even more challenging with the vast resources and techniques increasingly available to attackers. This paper studies the existing application layer DDoS attacks and provides...
With the development of Internet of things, its application is more and more close to people's life. As the main sensor networks of the Internet of things base layer, wireless sensor networks (WSN) provide users with a large number of useful real-time sensing data. While the user wants to enjoy the services provided by wireless sensor, the WSN must to access the Internet network in some way. This...
Electric Vehicle (EV) charging stations with battery swapping, as one promising energy supplement solution to cope with the increasing in EVs, demand a theoretical performance analysis framework. In this paper, we propose a queueing network model to serve as such a framework for battery swapping stations with a locally-charging mode. The model is a mixed queueing network with an open queue of EVs...
Electric Vehicle (EV) drivers have an urgent demand for fast battery refueling methods for long distance trip and emergency drive. A well-planned battery swapping station (BSS) network can be a promising solution to offer timely refueling services. However, an inappropriate battery recharging process in the BSS may not only violate the stabilization of the power grid by their large power consumption,...
Aiming at the lack of adequate and flexible access control in 3D virtual environment when used in education, according to RBAC model, we present an authority control method which can manage manipulations to all objects, e.g. a variety of assets, avatars, scripts and network communication pipes in 3D virtual environment. The proposed technique overcomes the insufficiency on access control aspect in...
Because of the lack of interactivity in E-learning, the design ideas are proposed to build a 3D interactive virtual learning environment which is built based on OpenSim platform-an open source virtual reality platform in the paper. The architecture of OpenSim platform is introduced, the development process of a 3D interactive virtual learning environment is summarized based on OpenSim platform, and...
At present, the lack of emotion is very serious in E-Learning. A solution is proposed in this paper. The importance of emotional education is discussed; the feasibility of emotional education is indicated based on virtual reality in E-Learning, including theories and advantages; the method of emotional teaching design is put forward; the emotional education system is designed and implemented in the...
As new organizing form, virtual enterprise has developed rapidly in many industries and domains. For virtual enterprise has some especial features such as resource dispersing, member diversity, organization dynamics and flexibility and so on, information resources management of it has much more difficulties. According to the features of virtual enterprise, the model of a distributed information resources...
Multi-agent technology has been used widely for developing some complicated, dynamic and distributed system now, but it is seldom to be applied to the realization of communication standards. This paper focuses on how to utilize the multi-agent to implement the international standard--IEC 61850 in the telecontrol communication of power system to make the substation monitoring devices exchange information...
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