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Developing Project Duration Models in Software Engineering

Journal of Computer Science & Technology 2007年第3期22卷 348-357页

作者： Pierre Bourque Serge Oligny Alain Abran Bertrand Fournier cole de Technologie Supérieure Montréal QuébecCanada Bell Canada Montréal QuébecCanada Université du Québec à Montréal Montréal QuébecCanada

Based on the empirical analysis of data contained in the International Software Benchmarking Standards Group （ISBSG） repository, this paper presents software engineering project duration models based on project effort. Duration models are built for the entire dataset and for subsets of projects developed for personal computer, mid-range and mainframe platforms. Duration models are also constructed for projects requiring fewer than 400 person-hours of effort and for projects requiring more than 400 person-hours of effort. The usefulness of adding the maximum number of assigned resources as a second independent variable to explain duration is also analyzed. The opportunity to build duration models directly from project functional size in function points is investigated as well.

关键词： international software benchmarking standards group (ISBSG) project duration models project scheduling models schedule and organizational issues software engineering time estimation

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Integration of GPS with a WiFi high accuracy ranging functionality

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Geo-Spatial Information Science 2013年第3期16卷 155-168页

作者： Khalid NUR Shaojun FENG Cong LING Washington OCHIENG Centre for Transport Studies Department of Civil&Environmental EngineeringImperial College LondonLondonSW72AZUK Department of Electrical&Electronic Engineering Imperial College LondonLondonSW72AZUK

High accuracy seamless positioning is required to support a vast number of applications in varying operational *** the last few years,the global positioning system(GPS)has become the de facto technology for positioning ***,its performance is limited in indoor and dense urban environments due to multipath as well as signal attenuation and blockage.A number of techniques integrating GPS with other positioning technologies have been developed to address the limitations of standalone GPS in these difficult *** most of the developed techniques cover the outages of GPS in such environments,they do not provide acceptable performance,in terms of positioning accuracy,especially for some mission-critical(***)*** paper proposes a tightly coupled(*** the measurement domain)GPS/WiFi integration method which,in addition to addressing GPS outages,improves the overall positioning accuracy to the meter-level,thus satisfying the requirements of a number of location based services and intelligent transport systems *** performance of the proposed GPS/WiFi integration method is assessed for a number of scenarios in a simulation environment for an identified dense urban area in London,UK.

关键词： GPS integration time estimation WiFi Improved FOCUSS for Arrival time estimation(IFATE) time Difference of Arrival(TDOA) WLAN IEEE802.11g

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