Failure Detection periodically detects node validity to maintain application layer network stability. The detection cycle interval value is a key parameter for detection scheme performance; there have been few studies on models of analyzing cycle interval value affecting the scheme. We propose a dynamic model of hierarchical application layer multicast tree node failure epidemic SIRS (NFE-SIRS). The NFE-SIRS analyzes statistical node failure in hierarchical application layer multicast tree structure, and models relationship between cycle interval value and detection scheme repair behavior, finally obtains the expected cycle interval value to improve detection scheme performance. Simulation shows that, the NFE-SIRS can dramatically improve detection scheme performance compared with common fixed cycle interval detection scheme.

With the continuous development of information technology, as well as sophisticated reconnaissance technology and developed communications network technology, massive data has been brought into battlefield simulation system. Effective management and use of such massive, distributed information in battlefield simulation, thus turn information superiority into decision superiority, has increasingly become a hot research field. To provide decision support for commanders at all levels in the complex battlefield environment, we need to establish a hierarchical battlefield environment model, and to consider the demand of intelligent decision support during the modeling of battlefield. This paper refines the common characteristic of battlefield simulation systems, proposes a battlefield simulation framework based on multi-agent. Intelligent agent was used to model battlefield troops, which brings in decision support into battlefield simulation system. The framework can be implemented with mainstream programming languages. This framework has advantage in simplicity, versatility and scalability.

This paper presents the memory cell level passive voltage contrast (PVC) involving diode, capacitor and transistor devices in a (dynamic random access) DRAM chip. More particularly, we show that the voltage contrast sensitivity can be improved significantly by the adjustment of scan location and scan location sequence. Both leaky and resistive fault localizations by PVC imaging are presented to illustrate our point.

Using multipath routing technology in MANET can improve network stability and reduce end-to-end latency. This paper proposes a Gateway-Centric, Node-Disjoint Multipath Routing Protocol called GC_NDMR to provide efficient data transmission scheme in the connectivity of MANET and Internet. The main idea of GC_NDMR is setting up multipath routing from source nodes to the gateway in MANET, and assigning data flows on multipath based on hops and latency algorithm. Simulation shows that, compared with single path routing protocol AODV interconnect scheme, GC_NDMR has more stable and low end-to-end latency performance. GC_NDMR meets the need of data transmission in the connectivity of MANET and Internet.

Physical world facts must be measured and translated into first-order-logic expression before participate the reasoning process in reasoning engine. However, mapping facts into first-order-logic form in real-time is not an easy task. This paper discusses the difficulties of such mapping in three aspects. Then, this paper proposes a multi-agent based scheme to solve these three problems. First, this paper introduces multi-agent frame to reduce system design complexity. Then, this paper proposes a table mapping algorithm to translate numeric facts into first-order-logic form. After that, a resampling mechanism considering overall system delay is introduced to selectively remove excessive facts. Finally, this paper gives a case study, which verifies that the scheme proposed in this paper is practical, efficient and easy to put into application.