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Realtime simulation on organizational behaviors is very important for detection of group attacks in cyber situational awareness. Previous work on the modeling and simulation of organizational behaviors is successful in top-down approach centering on certain organizational behaviors. However, these models are inefficient for realtime simulation on unknown organizational behaviors. To address this issue,...
In order to improve the electric car battery safety early warning ability and decrease the safe accident of electric vehicle charging, the electric vehicle charging safety factors are analyzed, the security early warning index selection ways and methods are studied, and a security early warning evaluation index system is set, the evaluation method of weight for safety index is discussed. Besides,...
In this paper, cyber physical system is analyzed from security perspective. A double closed-loop security control structure and algorithm with defense functions is proposed. From this structure, the features of several cyber attacks are considered respectively. By this structure, the models of information disclosure, denial-of-service (DoS) and Man-in-the-Middle Attack (MITM) are proposed. According...
A person is considered as an influential individual when his behaviors can trigger other people's reactions. Such phenomenon is called user influence in social networks. Measuring user influence provides insights into dynamics of social network interactions. This makes a fundamental step for constructing marketing strategy, recommendation systems and so on. There have been various studies focusing...
The densification of small cells (SCs) and caching at the edge are two promising approaches to improve the network throughput, reduce end-to-end delay and backhaul cost in future 5G wireless networks. However, current analysis and design only focus on the system state at a certain time, neglecting the temporal-spatial fluctuation of traffic and the content popularity variations, which are often affected...
In geosynchronous (GEO) synthetic aperture radar (SAR), the high orbit height and the long integration time would lead to the significant round-trip delay time and the curved flight path, thus the traditional range model with ‘stop-go’ assumption will be ineffective. In this Paper, based on the analysis of instantaneous Doppler frequency of GEO SAR, an equivalent midpoint mathematical model is proposed...
The aircraft target in the airport and its ground background are significant in military applications. In order to employthe algorithms for the detection, identification and dynamic monitoring, a software which can complete infrared radiation simulation of aircraft/ground object in airports under conditions of different seasons, different meteorological conditions, different periods and different...
Due to the ever-increasing use of electric vehicles (EVs) and renewable energy sources, the charging station with renewable energy supply is made as one promising energy solution. Moreover, grouping vehicles into platoons could greatly improve road capacity and reduce energy consumption. These tendencies urgently demand a theoretical performance analysis framework of the EV platoons charging at renewable...
MARTE (Modeling and Analysis of Real-Time and Embedded Systems) is a profile of UML (United Modeling Language). MARTE provides support for specification, design and verification of real-time and embedded systems. Even though MARTE time model offers a support to describe multiform clocks, it lacks the ability to model both discrete and continuous behaviors of a hybrid system. To address the problem...
This paper analyzes the influence mechanism of the ship low frequency vibration on the output characteristics of PV cells under direct light and scattered light. And the simulation model in the MATLAB/Simulink platform has been put up, and some related experimental studies have been carried out based on the experiment platform, which can simulate ship vibration environment. The results of the simulation...
We investigate the local connectivity of cognitive radio ad hoc networks (CRAHNs), i.e., node degree and probability of node isolation. The local connectivity of CRAHNs depends on not only its own network parameters but also the primary networks. To analyze the local connectivity, we use stochastic geometry and probability theory to derive the distribution of node degree, probability of available...
SEM is a burgeoning multivariate data analysis method. ARMA is one of the most widely used model about time series data. This paper compare the mathematical model about the SEM and ARMA model, and find they are similar. So we can process ARMA model with SEM.
The performance metrics are very important for performance evaluation and system design. In the literature, their analyses are given only when the traffic with classical exponential distribution under time invariant channels. In this paper, using multidimensional Markov model, we analyze the performance of heterogeneous wireless networks with heavy tail traffic under the time variant channels. Some...
To a prolonged operation production system, if the availability of facility production capability is strong randomness, design appropriate amount of buffer stock to meet the continued operation or the maximum to reduce the loss because of the preventive maintenance process and occasional failure is very necessary. In this paper, we trade off the holding cost, shortage cost, the occasional failure...
Vehicular Ad Hoc Networks (VANETs) and their diverse applications experience growing interest in both academic and industry. Different types of traffic packets delivered through vehicle-to-vehicle and vehicle-to-infrastructure communications are intended to improve passenger safety and comfort. In this paper, we propose a multiple priority supported Medium Access Control (MAC) protocol for VANETs...
We consider different piecewise linear (PWL) models for nonlinear devices in the context of formal DC operating point and transient analyses of analog circuits. PWL models allow us to encode a verification problem as constraints in linear arithmetic, which can be solved efficiently using modern SMT solvers. Numerous approaches to piecewise linearization are possible, including piecewise constant,...
Knowledge sharing behavior is the attitudes and manners that team members do things in the process of complex product development knowledge sharing. This paper analyzes three factors that influence team members' knowledge sharing behavior in complex product development which are self-efficacy, trust and outcome expectation. Then study assumption and study model are put forwarded, and influencing effect...
This paper is about two competing supply chains' structure decision, each of which consists of three level (manufacture-distributor- retailer). Firstly, models about two supply chains competition are established by nonlinear programming and game theory. Secondly, the optimal solution in three scenarios: pure decentralized system, pure centralized system and hybrid system is resolved. Finally, the...
The emerging wireless vehicular communication technology is intended to improve safety and comfort of transportation systems. Different types of traffic information could be delivered through vehicle-to-vehicle and vehicle-to- infrastructure communications. This paper proposes a Quality-of-Service (QoS) supported multi-channel MAC scheme for Vehicular Ad Hoc Networks (VANETs), which can adaptively...
Risk management is an eternal topic in financial domain. In the foundation of analysis financial risk management business, this article proposed the component development model based on component-oriented technology. This model can resolve questions of component's internal structure and organization, guarantee good functional division of responsibilities and separation of concerns, guarantee that...
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