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Modularization is a significant way to ease the challenge of evaluating large-scale fault trees known as a NP-hard problem, especially for BDD algorithm. In our previous work, we proposed an effective parallel modularization algorithm for large-scale coherent fault trees which only include gates with AND logic and OR logic. But in real engineering scenarios, fault trees usually consist of many complex...
Fault-tree analysis is a useful analytic tool for the reliability and safety of complex system. However, fault tree is not suitable for repairable system. In this paper, we will propose a new method called TTF (time to failure) and TTM (time to maintenance) to analyze repairable system. Nevertheless, Monte Carlo simulation may be time consuming. In order to reduce simulation time, a parallel algorithm...
The GO-FLOW methodology is a reliability analysis methodology [1]. It is success-oriented system analysis technique and is capable of evaluating system reliability and availability of system with complex time-sequence problems and phased mission problems. The modeling technique produces a chart which consists of signal lines and operators, and represents engineering function of the components/subsystems/system...
In the field of reliability and safety, Fault-tree analysis proved to be a useful analytic tool. Aimed at static or dynamic FTs, Monte Carlo simulation based on time-to-failure (TTF) may be an effective way to calculate FTs. Through computing the TTF of bottom events of FTs, the TTF of the system can be calculated easily. However, Monte Carlo simulation based on TTF is time-consuming because modern...
Fault tree analysis is very important in the reliability design and analysis program of a product. However, the traditional fault tree construction method is difficult to implement since it requires high capability of the modelers and a long period, furthermore the process is complicated. Compared with this, the Go model is easy to build due to its similarity with the principle diagram of the system...
A common service platform is considered as the key enabler to catalyze the development of IoT/M2M applications for a large variety of vertical markets such as smart energy, smart transportation, home and industry automation, eHealth and connected vehicles. This paper reports an initial effort at National Chiao Tung University in Taiwan with such an experimental approach. We first train our graduate...
With the development of large-scale, intelligent and complex systems, the conventional fault tree analysis method is incapable of analyzing the fault tree model of systems with vague data and multi-state. As a solution, this paper proposes a new approach of fuzzy multi-state fault tree analysis method based on a fuzzy expert system. Fuzzy theory is applied to representing the degree of fault tree...
Power and thermal considerations are becoming limiting factors for submicron circuits as technology scales down. In order to detect abnormal temperature changes so as to detect defects on chip, and increase reliability and service life of devices, an all CMOS temperature sensor for submicron circuits' test is proposed. A current proportion to absolute temperature is generated for achieving linear...
In highly mobile pure ad-hoc wireless mesh networks, fast rerouting within low routing discovery delay is a mandatory requirement for routing algorithm to support interactive applications such as VoIP. Also, the communication overhead should be thwarted when networks grow to a large scale. We propose a tree-based routing algorithm - TBRA to facilitate such two goals. On one hand, TBRA has very low...
In highly mobile large-scale vehicular ad-hoc networks, routing protocols must be fast and efficient in terms of low routing discovery delay and communication overhead to support the applications such as car talk. Such requirement becomes more difficult to achieve when inducing security enhancement to tackle the authentication of routing messages. In this paper, we propose a lightweight (fast) secure...
The paper presents a novel 1.5 kVA, 42/36 V contactless auto power generation system that is capable of efficient high electric power as needed for future automobiles. The new system consists of a permanent magnet synchronous generator (PMSG) and a novel electronic voltage regulator. A proof of concept system has been built and tested. The results show that this high output is provided at 18 to 24...
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