Results 51 to 60 of about 91,121 (140)

Assessment of Multi-Frequency PPP Ambiguity Resolution Using Galileo and BeiDou-3 Signals

Remote Sensing, 2021
From network RTK to PPP-RTK, it is highly expected that high-precision positioning within a few minutes can be achieved with a sparse reference network.
Jiang Guo, Qiyuan Zhang, Guangcai Li, Kunlun Zhang   +3 more
doaj   +1 more source

Design and Reception Method of Code Shift Keying Signals With Power‐of‐Two Phase Intervals

IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.
A novel approach for the design and reception of CSK signals with a phase interval mapping of power‐of‐two chips is proposed. This method is capable of significantly reducing the demodulation complexity while mitigating the intersymbol interference. ABSTRACT Precise point positioning (PPP) technology has garnered extensive attention for its ability to ...
Nengjie Yu, Dun Wang, Xiaohui Ba, Mingquan Lu, Shaobo Shen   +4 more
wiley   +1 more source

Policy approaches to stimulate exports: The case of Georgia

Public Administration and Development, Volume 44, Issue 3, Page 150-156, August 2024.
Abstract This report examines exporters’ challenges and possible solutions for public intervention to promote foreign trade. Based on fieldwork conducted in Georgia, we explore which policy approaches can help to stimulate Georgian exports further. Our outcomes show that exporters face substantial barriers such as navigating complex trade regulations ...
Andreas Klasen, Tengiz Lomitashvili, Kristian Rosbach, Kiyoshi Taniguchi   +3 more
wiley   +1 more source

Low-Cost IMU and Odometer Tightly Augmented PPP-B2b-Based Inter-Satellite Differenced PPP in Urban Environments

Remote Sensing, 2022
Since 23 June 2020, BDS-3 has been entirely operated and obtained the ability of global PNT (Positioning, Navigation, and Timing) services. Afterward, real-time Precise Point Positioning (PPP) service is available in China’s surrounding areas via BDS-3 ...
Yu Min, Zhouzheng Gao, Jie Lv, Ruohua Lan, Qiaozhuang Xu, Cheng Yang   +5 more
doaj   +1 more source

Does intrinsic motivation or extrinsic pressure matter more? An exploratory study of small businesses going green and innovation

Business Strategy and the Environment, Volume 33, Issue 5, Page 3855-3886, July 2024.
Abstract Small firms may go green because of intrinsic motivation (to realise their green values) or extrinsic pressure (to satisfy the requirements of stakeholders). While the impacts of these two motivations on firms' green behaviours have been discussed in the literature, their influences on economic behaviours such as innovation remain unclear ...
Bach Nguyen, Nhung Vu
wiley   +1 more source

Safety and efficacy of a feed additive consisting of muramidase produced with Trichoderma reesei DSM 32338 (Balancius™) for laying hens (DSM nutritional products)

EFSA Journal, Volume 22, Issue 5, May 2024.
Abstract Following a request from the European Commission, EFSA was asked to deliver a scientific opinion on the safety and efficacy of muramidase produced with Trichoderma reesei DSM 32338 (Balancius™) as a feed additive for laying hens. The additive is already authorised as a zootechnical additive (functional group: other zootechnical additives) for ...
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP), Vasileios Bampidis, Giovanna Azimonti, Maria de Lourdes Bastos, Henrik Christensen, Birgit Dusemund, Mojca Durjava, Maryline Kouba, Marta López‐Alonso, Secundino López Puente, Francesca Marcon, Baltasar Mayo, Alena Pechová, Mariana Petkova, Fernando Ramos, Roberto Edoardo Villa, Ruud Woutersen, Andrey Yurkov, Montserrat Anguita, Matteo L. Innocenti, Fabiola Pizzo, Daniel Pagés Plaza, Elisa Pettenati, Jordi Ortuño   +23 more
wiley   +1 more source

Digital divides among microenterprises: Evidence from sub‐Saharan Africa

Journal of International Development, Volume 36, Issue 2, Page 1350-1380, March 2024.
Abstract This paper investigates digital inequalities in usage within African informal sectors. In particular, we examine whether the uneven digital diffusion is embedded in pre‐existing socio‐economic inequalities. After identifying three segments of informal firms, we rely on multivariate and decomposition analyses to identify predictors of usage of ...
Damien Girollet
wiley   +1 more source

Undifferenced precise time transfer with information‐constraints

IET Radar, Sonar &Navigation, Volume 18, Issue 3, Page 410-422, March 2024.
The undifferenced precise time transfer method based on information constraints could effectively be used to smooth the clock difference sequence of the receiver and the clock difference sequence of the time transfer link. This method can also be used to reflect the performance of atomic clocks at GPS stations and is better suited for the precise time ...
Mingyue Liu, Rui Tu, Qiushi Chen, Qi Li, Junmei Chen, Pengfei Zhang, Xiaochun Lu   +6 more
wiley   +1 more source

Analysis and Assessment of BDS‐3 Five Single‐Frequency Civilian Signals Single Point Positioning Considering Time Group Delay and Intersignal Correction

International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.
The BeiDou Global Navigation Satellite System (BDS‐3) has been providing global positioning, navigation, and timing (PNT) services for over 3 years. Single‐frequency single point positioning (SPP) receivers have significant advantages such as low hardware cost and easy implementation, making them widely used in engineering practice.
Xingli Sun, Dakun Sun
wiley   +1 more source

Real-Time Precise Positioning Performance of BDS-3 PPP-B2b: Evaluation and Marine Buoy Application

Journal of Marine Science and Engineering
This study decodes the BDS-3 PPP-B2b binary data broadcast by BDS satellites using a self-developed software decoder, RT-B2b (Real-Time PPP-B2b). The orbit, clock corrections, and differential code biases (DCB)—collectively referred to as State Space ...
Xiangyu Tian, Haojun Li, Xiao Yin, Tengfei Bai, Ren Wang, Jialong Sun   +5 more
doaj   +1 more source