Results 11 to 20 of about 833 (115)

Determination of the Precise Coordinates of the GPS Reference Station in of a GBAS System in the Air Transport

open access: yesCommunications, 2020
This paper presents results of research concerning determination of the GPS reference station coordinates located on the grounds of an EPDE airport in Deblin.
Kamil Krasuski, Stepan Savchuk
doaj   +1 more source

Operation mode selection of NIMBY facility Public Private Partnership projects.

open access: yesPLoS ONE, 2021
Construction of not in my back yard (NIMBY) facility Public Private Partnership (PPP) projects are feasible measures to realize sustainable urbanization.
Hui Zhao, Jingqi Zhang, Yuanyuan Ge
doaj   +1 more source

Assessment of the Feasibility of PPP-B2b Service for Real-Time Coseismic Displacement Retrieval

open access: yesRemote Sensing, 2021
Traditional coseismic displacement retrieval generally uses real-time kinematic (RTK) and precise point positioning (PPP) services. However, both RTK and real-time PPP need a network link to transmit the corrected data.
Hao Yang   +5 more
doaj   +1 more source

Evaluation of PPP-ABS investment environment based on combined weighting of level difference maximization and TOPSIS method.

open access: yesPLoS ONE, 2023
Asset-backed securitization (ABS) is currently used to refinance public-private partnership (PPP) projects in the infrastructure field. To stimulate the investors' enthusiasm, this study evaluated the investment environment of PPP projects asset-backed ...
Lijun Zhang, Junwen Feng, Bo Feng
doaj   +1 more source

Optimization method for multi-constellation precise point positioning performance evaluation [PDF]

open access: yesJisuanji gongcheng, 2019
In order to reduce the number of parameters to be estimated and improve the positioning accuracy in the data processing of multi-constellation Precise Point Positioning(PPP),a performance evaluation method based on ambiguity integer solution for the ...
HE Wei,GUO Chengjun,TIAN Zhong
doaj   +1 more source

Review and principles of PPP-RTK methods [PDF]

open access: yesJournal of Geodesy, 2014
PPP-RTK is integer ambiguity resolution-enabled precise point positioning. In this contribution, we present the principles of PPP-RTK, together with a review of different mechanizations that have been proposed in the literature. By application of $$\mathcal {S}$$
Teunissen, Peter, Khodabandeh, Amir
openaire   +2 more sources

Performance investigation of LAMBDA and bootstrapping methods for PPP narrow-lane ambiguity resolution

open access: yesGeo-spatial Information Science, 2021
Precise point positioning with ambiguity resolution (PPP-AR) is a powerful tool for geodetic and time-constrained applications that require high precision.
Omer Faruk Atiz   +4 more
doaj   +1 more source

Review of PPP–RTK: achievements, challenges, and opportunities

open access: yesSatellite Navigation, 2022
The PPP–RTK method, which combines the concepts of Precise of Point Positioning (PPP) and Real-Time Kinematic (RTK), is proposed to provide a centimeter-accuracy positioning service for an unlimited number of users.
Xingxing Li   +6 more
doaj   +1 more source

Risk Sharing of Urban Underground Comprehensive Pipe Gallery PPP Project Based on Grey Relational Analysis [PDF]

open access: yesE3S Web of Conferences, 2021
In order to establish a reasonable, effective and accurate risk sharing mechanism for PPP project of urban underground comprehensive pipe gallery, 25 risk factors are identified by the work structure decomposition method.
Shixia Duan, Jielin Diao
doaj   +1 more source

Quantitative Assessment of the Likelihood of Disputes in PPP Projects Using Fault Tree Analysis

open access: yesBuildings, 2022
Disputes involved in public–private partnership (PPP) projects destroy the relationship between governments and private partners and generate huge losses.
Xiaoxiao Zheng   +3 more
doaj   +1 more source

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