When a natural gas pipeline ruptures, the adjacent automatic line control valves (ALCVs) should close quickly to prevent leakage or explosion. The differential pressure set point (DPS) at each valve location is the main criteria for value setting in ALCV action. If the DPS is not properly adjusted, the ALCV may mistakenly close or it may not take any action at proper time. This study focused on...

in this research an algorithm based on monte carlo simulation is introduced to assess the risk of fire following earthquake in residential, industrial, educational, and governmental land-uses in district no. 20 of tehran. the proposed algorithm consist of different modules including hazard analysis, vulnerability assessment, leak and break analysis of damaged pipeline, ignition probability anal...

Context effects preference changes depending on the availability of other options have wide ranging implications across applied and theoretical domains, and have driven the development of new dynamic models of multi-attribute and multialternative choice. We propose the Multi-attribute Linear Ballistic Accumulator (MLBA), a new dynamic model that provides a quantitative account of the co-occurre...

A popular view of interval timing in animals is that it is driven by a discrete pacemaker-accumulator mechanism that yields a linear scale for encoded time. But these mechanisms are fundamentally at odds with the Weber law property of interval timing, and experiments that support linear encoded time can be interpreted in other ways. We argue that the dominant pacemaker-accumulator theory, scala...

In this paper, we proposed a new architecture of multiplier-and-accumulator (MAC) for high-speed arithmetic and low power. Multiplication occurs frequently in finite impulse response filters, fast Fourier transforms, discrete cosine transforms, convolution, and other important DSP and multimedia kernels. The objective of a good multiplier and accumulator (MAC) is to provide a physically compact...

Numerosity and duration processing have been modeled by a functional mechanism taking the form of an accumulator working under two different operative modes. Separate investigations of their cerebral substrates have revealed partly similar patterns of activation, mainly in parietal and frontal areas. However, the precise cerebral implementation of the accumulator model within these areas has no...