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Researchers have proposed that the reliability of software prediction models can be assessed by the following most widely used evaluation criterion, i.e., Difference Measure and Ratio Measure. Ratio measure is more suitable for the assessment of the accuracy in software cost estimation. Results in this research demonstrated that applying proposed method to the software effort estimation is by far...
Aster seismology is an emerging branch of astrophysics that studies the interior and global parameters of pulsating stars, based on their natural oscillation frequency. This work proposes different methods for increasing the performance of LNAWENR (Linear Non Adiabatic Non Radial WavEs), a computational intensive pulsational model that studies stars based on their seismic properties. As part of the...
This paper addresses the scientific challenges related to high level implementation strategies which steer the NEMO (Nucleus for European Modelling of the Ocean) code toward the effective exploitation of the opportunities offered by exascale systems. We consider, as case studies, two components of the NEMO ocean model (OPA-Ocean PArallelization): the Sea Surface Height equation solver and the Variational...
Water injection exploration is a primary technology to ensure crude oil production. Especially during the mid to late term of oil field development, no water injection means no crude production. Therefore, oilfield companies set up large injection pump station and pipe network system to guarantee normal operation and increasing production. Simulation evaluation, optimized running management and automatic...
Discrete Time Markov Chains (DTMCs) and Continuous Time Markov Chains (CTMCs) are often used to model various types of phenomena, such as, for example, the behavior of software products. In that case, Markov chains are widely used to describe possible time-varying behavior of “self-adaptive” software systems, where the transition from one state to another represents alternative choices at the software...
Climate and weather modeling is a significant consumer of High Performance Computing due to the hard deadlines inherent in predicting weather. Given the large data volumes and runtimes involved, climate and weather modeling is ideally suited for dataflow computation. In this paper, we demonstrate a dataflow implementation of the dynamic core of a meteorological limited area model. To achieve maximum...
A long standing problem in software engineering is inadequate requirements elicitation, analysis, specification, validation and management. The lack of well defined requirements is one of the major causes of project failure. Several well-known techniques and frameworks have been developed to deal with the functional aspect of requirements engineering. Recent years have also seen the emergence of frameworks...
Gas transmission station is an important part of transmission system. How to effectively reduce the pressure loss inside the station and improve the transmission efficiency has become one of hotspots that pipeline operating companies pay much attention to. Sequential modular approach is proposed to realize the connection between devices and achieve a whole gas transmission station process simulation...
It has recently been shown that the model in experimental design can be expressed in terms of an orthonormal system. In this case, the model is expressed by using Fourier coefficients instead of the effect of each factor. As there is an abundance of software for calculating the Fourier transform, such a system allows for a straightforward implementation of the procedures for estimating the Fourier...
The π-calculus is a process algebra originally designed for modelling communicating systems. In this work, it is applied to the design of schedules for partial dynamic reconfiguration, which denote when modules become active and which channels they use for communication. While the execution of the π-calculus in software is possible, a direct execution in hardware is desirable for two reasons: Firstly,...
Gas pipe flow simulation is used to optimize, verify design and to throw light on various operational issues. This paper illustrates some of the different parameters affecting how complicated it is to do those computations, arranged so that the simplest alternatives are on top.
Service-Oriented Computing is known as a new computing paradigm that utilizes existing services as fundamental elements for developing distributed applications based on the so-called "use, not own" manner. In this paper, services are classified into three levels in accordance with different business requirements. Services are assembled by choosing lower-level services or other services at...
In the paper we demonstrate use of the computer modeling as a tool for study of the real technological processes. For this purpose, we present the software application that we programmed for study of the soaking which belongs to tannery operations of the raw hide treatment. The software application is destined for computing of the concentration field of unbound undesirable component removing from...
Hydraulic support is the key equipment of coal excavation with full mechanization. Hydraulic support must pass national strength test before it quantity production and use. Hydraulic support model test based on similarity theory is a new effective hydraulic support design and test method. The test information such as displacement, stress, strain and so on can be generalized to hydraulic support prototype,...
There is still an urgent need of finding a mathematical model which can provide an accurate relationship between the software project effort/cost and the cost drivers. A powerful algorithm which can optimize such a relationship via developing a mathematical relationship between model variables is urgently needed. In this paper, we explore the use of GP to develop a software cost estimation model utilizing...
Numerical reservoir simulation is one of the effective tools for complex fluid analysis in the oil industry. This paper analyzed the principle of thermal recovery simulation, and designed and implemented a parallel program of the thermal recovery simulation based on PESTc toolkit. The improved domain decomposition with load-balance control was presented to partition the computation into different...
Simulation software is a fundamental tool that should be used when designing systems dealing with electro-thermal interaction, for instance. Nevertheless, there exist some inconveniences that limit and make specific software hard to use in this task. On one side, it may require a large processing hardware capacity, and on the other, simulation time increases substantially if the model complexity and...
The retrofitted electro-hydraulic system for hydraulic robotic excavator was introduced. According to the principle and characteristic of LUDV system, the model of electro-hydraulic system was derived, simplified and verified by relative experiment. Trajectory controller prototype was designed based on incremental theory of trajectory controlling to verify the accuracy of the controlling. Trajectory...
Cloud computing is a latest new computing paradigm where applications, data and IT services are provided over the Internet. Cloud computing has become a main medium for Software as a Service (SaaS) providers to host their SaaS as it can provide the scalability a SaaS requires. The challenges in the composite SaaS placement process rely on several factors including the large size of the Cloud network,...
Slicing is an effective method for focusing on relevant parts of a program in case of a detected misbehavior. Its application to fault localization alone and in combination with other methods has been reported. In this paper we combine dynamic slicing with model-based diagnosis, a method for fault localization, which originates from Artificial Intelligence. In particular, we show how diagnosis, i...
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