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For the current existing problems of modeling on stage different coordination, it analyzes the Ampere-second characteristic of the common DC circuit breakers, which must considers the dispersion characteristic. Through correcting the Ampere-second characteristic function by time-sharing coefficient, it can draw the Pre-acring Ampere-second curve and analyze the stage different coordination. On this...
Mobile communication needs battery energy. There is always a trade-off between power consumption and bit-error performance. To investigate this, power modeling of the hardware components is necessary. In this paper, a baseband energy model for VLSI design optimization considering both dynamic and static energy consumption for wireless application with short distance is introduced. Due to the trade-off...
Closing the THz gap would lead to a tremendous of advancement in a wide range of applications such as biomedical imaging, security, and material inspection. The gap refers to the lack of devices for the manipulation of THz radiation as compared to its microwave and optical counterparts. Plasmonic devices based on semiconductors rather than metals allow the realization of efficient and small scale...
The paper proposes an innovative method for the performance analysis of opportunistic forwarding protocols over files logging mobile node encounters (contact traces). The method is modular and evolves in three steps. It first carries out contact filtering to isolate contacts that constitute message forwarding opportunities for givenmessage coordinates and forwarding rules. It then draws on graph expansion...
Intrusion Detection Systems (IDS) have become ubiquitous in the defense against virus outbreaks, malicious exploits of OS vulnerabilities, and botnet proliferation. As attackers frequently rely on host scanning for reconnaissance leading to penetration, IDS is often tasked with detecting scans and preventing them. However, it is currently unknown how likely an IDS is to detect a given Internet-wide...
With emerging trend in technology wireless networks allow user to travel from one location to another. Mobile Adhoc network (MANET) is one of the subareas of wireless network that dynamically form infrastructure less temporary network. MANET is a collection of intercommunicating mobile nodes forming a temporary network without any centralized administration. Due to the dynamic property of mobile nodes...
A direct way to get the throughput of an asynchronous circuit would be through simulations. However, traditional simulation-based throughput analysis methods cannot achieve both accurate in estimates and quick in runtimes. In this paper, we propose an event-driven simulator to estimate the throughputs of asynchronous pipelines. Experimental results show the efficiency of the method.
This paper presents a new current source model (CSM) that allows to model noise on supply nets originating from CMOS logic cells. It also captures the influence of dynamic supply voltage changes on power consumption and cell delay. The CSM models n/pMOS blocks separately to reduce the complexity of model components. Compared with other CSMs, only two-dimensional tables are needed. This results in...
This paper develops a framework to analyze the latency and delay composition of workflows in a real-time networked aggregation system. These workflows are characterized by different sensor inputs that are processed along parallel branches that eventually merge or fuse to compute the aggregation result. The results for each flow must be produced within certain end-to-end deadlines or else the information...
Speculative adders have attracted strong interest for reducing critical path delays to sub-logarithmic delays by exploiting the tradeoffs between reliability and performance. Speculative adders also find use in the design of reliable variable latency adders, which combine speculation with error correction to achieve high performance for low area overhead over traditional adders. This paper describes...
To increase the accuracy of static timing analysis, the traditional nonlinear delay models (NLDMs) are increasingly replaced by the more physical current source models (CSMs). However, the extension of CSMs into statistical models for statistical timing analysis is not easy. In this paper, we propose a novel correlation-preserving statistical timing analysis method based on transistor-level gate models...
In this paper, we focus on modeling and analyzing multi-cast and broadcast traffic latencies on switch-level within an Ethernet- based communication network for automotive applications. The analysis is performed adapting existing worst/best case schedulability analysis concepts, techniques, and methods. Under our modeling assumptions, we obtain safe bounds for both the minimum (lower bound) and maximum...
Although power flow of current power utility network, smart grid system exchange digital information and power flow bidirectional interaction between provider and user. Thanks to communication networks, exchange of information between end user and power suppliers can estimate the power consumption more precisely and stable operation of power utility can be possible. To provide these advantages, importance...
In 3D ICs, TSV-induced thermal residual stress impacts transistor mobilities due to the piezoresistive effect. This phenomenon is coupled with other temperature effects on transistor parameters that are seen even in the absence of TSVs. In this paper, analytical models are developed to holistically represent the effect of thermally-induced variations on circuit timing. The analysis is based on a semianalytic...
MODEST is a behavioural modelling language for stochastic timed systems, which allow the representation of both probabilistic and real-time aspects together with nondeterministic decisions and abstractions. Rooted in process algebra, it has an expressive syntax enriched with features from programming languages, leading to concise models with a clearly defined semantics. A key idea behind MODEST is...
Generally, IEEE 802.11 DCF is used as a MAC layer protocol to form an ad hoc network as it enables one to configure a mobile host either in ad hoc mode or infrastructure mode. In this paper, we carry out an analysis of IEEE 802.11 DCF for an ad hoc network under saturation conditions. We focus on the average end-to-end delay, throughput, and the loss probability for single hop as well as multiple...
Timeout control is a simple mechanism used when direct feedback is either impossible, unreliable, or too costly, as is often the case in distributed systems. Its effectiveness is determined by a timeout threshold parameter and our goal is to quantify the effect of this parameter on the behavior of such systems. In this paper, we consider a basic communication system with timeout control, model it...
In this paper a method is presented for mapping the simulation state between models of different level of detail in dynamic multiresolution modeling of discrete event material flow systems. In dynamic multiresolution modeling it is possible to inactivate a model part of certain detail and activate a model of higher or lower detail representing the same part of the system during simulation. To allow...
In this paper, we discuss the critical role of simulation input modeling in a successful simulation study. Two pitfalls in simulation input modeling are then presented and we explain how any analyst, regardless of their knowledge of statistics, can easily avoid these pitfalls through the use of the ExpertFit distribution-fitting software. We use a set of real-world data to demonstrate how the software...
Distributed systems with multi-stage workflows are characterized by multiple logical stages which can either execute sequentially or concurrently and a single stage can be executed on one or more physical nodes. Knowing the mapping of logical stages to physical nodes is important to characterize performance and study resource bottlenecks. Often due to the physical magnitude of such systems and complexity...
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