Results 21 to 30 of about 833 (115)
A mixed-methods comparison of the performance of Dutch PPP and non-PPP infrastructure projects
, 2022 Rijkswaterstaat, the Netherlands' major procurer of transport infrastructure, uses two primary contract types: Design and Construct (D&C) and Design-Build-Finance-Maintain (DBFM). In this chapter, we comparatively analyze the cost and time performance of these contract types using quantitative financial data on DBFM (N=12) and large D&C ...
van Meerkerk, Ingmar +6 more
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Public Private Partnership in Transportation Infrastructure: A Review on Toll Road Development [PDF]
E3S Web of Conferences, 2023 Public-private partnerships (PPPs) have become an increasingly important tool for delivering infrastructure and public services worldwide. In Toll Road development, PPP scheme is often being used to deliver public infrastructure. PPPs have received a lot
Steelyana Evi, Kinanti Dhea
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Real-Time Single Frequency Precise Point Positioning Using SBAS Corrections
Sensors, 2016 Real-time single frequency precise point positioning (PPP) is a promising technique for high-precision navigation with sub-meter or even centimeter-level accuracy because of its convenience and low cost. The navigation performance of single frequency PPP
Liang Li +5 more
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Development of a Combined GPS/GLONASS PPP Method [PDF]
Journal of Positioning, Navigation, and Timing, 2014 Precise Point Positioning (PPP) is a stand-alone precise positioning approach. As the quality of satellite orbit and clock products from analysis centers has been improved, PPP can provide more precise positioning accuracy and reliability. A combined use of Global Positioning System (GPS) and Global Orbiting Navigation Satellite System (GLONASS) in PPP
Byung-Kyu Choi +2 more
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Cogent Business & Management, 2021 The budgetary pressures, scarcity of resources, and incessant increases in the demand for public services have driven the Malaysian government to involve the private sector in the development of infrastructure through public–private partnership (PPP ...
Usman Ahmad, Hamid Waqas, Kashif Akram
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A new receiver clock model to enhance BDS-3 real-time PPP time transfer with the PPP-B2b service
Satellite Navigation, 2023 A new Precise Point Positioning (PPP) service, called the PPP-B2b service, has been implemented in the BeiDou-3 Navigation Satellite System (BDS-3), which brings new opportunities for time transfer.
Yulong Ge +6 more
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Research on the pricing of PPP project ABS products based on the right of income of heating
Frontiers in Energy Research, 2023 Introduction: The Public-Private Partnership (PPP) model has the advantages of enhancing the efficiency of social infrastructure construction and reducing the risk of government liabilities, and has been widely used and developed in China. In the current
Zheng Duan, Yifan Zhang
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Introduction of the Double-Differenced Ambiguity Resolution into Precise Point Positioning
Remote Sensing, 2018 According to the advantages of the precise point positioning (PPP) and the double-differenced (DD) model based algorithm, a new method for the integration of DD integer ambiguity resolution into PPP is presented.
Haojun Li +4 more
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Remote Sensing, 2020 The determination of slant total electron content (STEC) between satellites and receivers is the first step for establishing an ionospheric model. However, the leveling errors, caused by the smoothed ambiguity solutions in the carrier-to-code leveling ...
Jin Wang +5 more
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Precise Point Positioning with Partial Ambiguity Fixing
Sensors, 2015 Reliable and rapid ambiguity resolution (AR) is the key to fast precise point positioning (PPP). We propose a modified partial ambiguity resolution (PAR) method, in which an elevation and standard deviation criterion are first used to remove the low ...
Pan Li, Xiaohong Zhang
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