Results 31 to 40 of about 31,123 (259)
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
Time-Domain Evaluation Method for Clock Frequency Stability Based on Precise Point Positioning
IEEE Access, 2019 The Global Navigation Satellite System (GNSS) and GNSS receivers can be used to measure the time-frequency errors of receiver clocks so as to evaluate their frequency stability. The calculation of receiver clock error by single point positioning (SPP) is
Yang Lei +4 more
doaj +1 more source
Remote Sensing, 2018 Integer ambiguity resolution (IAR) is important for rapid initialization of precise point positioning (PPP). Whereas many studies have been limited to Global Positioning System (GPS) alone, there is a strong need to add Globalnaya Navigatsionnaya ...
Yanyan Liu, Shengfeng Gu, Qingquan Li
doaj +1 more source
Factors determining the success of public private partnership projects in Nigeria
Construction Economics and Building, 2016 The implementation of public private partnership (PPP) procurement method is expected to help governments in the development of infrastructures and provides an opportunity for the reduction in the governments’ debt profiles.
Afeez Olalekan Sanni
doaj +1 more source
Advanced Functional Materials, EarlyView.A graphene‐supported 2D metal–organic network stabilizes highly reactive Fe(I)‐N4 single sites through Co‐induced charge redistribution. Combined experiments and theory reveal Fe(I) formation, oxygen‐driven oxidation, and O2 activation mechanisms, offering a strategy to access low‐valent iron centers relevant to catalytic and biological processes ...
Alessandro Namar +9 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Solution‐based ligand‐assisted epitaxial growth (LAEG) yields high‐quality CsPbBr3 microcrystals on different substrates with superior morphology, passivated surfaces, and high photoluminescence quantum yield. These robust micro‐resonators achieve record‐low room‐temperature lasing thresholds of 7.2 kW·cm−2 and maintain operational stability up to 90 ...
Shuyu Zhou +19 more
wiley +1 more source
Applied SciencesThis study evaluates the performance of the Precise Point Positioning with Ambiguity Resolution (PPP-AR) method under varying durations and software platforms in determining the optimal placement of Ground Control Points (GCPs) for use in photogrammetric
Burhaneddin Bilgen +2 more
doaj +1 more source
Endosomal Escape of siRNA Polyplexes: A Molecular Dynamics Perspective on Underlying Mechanisms
Advanced Functional Materials, EarlyView.Molecular dynamics simulations reveal distinct endosomal escape mechanisms of siRNA nanoparticles, ranging from electrostatic membrane attachment to hydrophobic membrane fusion. Hydrophobic residues and anionic endosomal lipids emerge as key determinants of membrane disruption, linking molecular interactions to experimental delivery performance and ...
Katharina M. Steinegger +5 more
wiley +1 more source