Precise Point Positioning (PPP) has been demonstrated as a simple and effective approach for user positioning. The key issue in PPP is how to shorten convergence time and improve positioning efficiency. Recent researches mainly focus on the ambiguity resolution by correcting residual phase errors at a single station. The success of this approach (referred to hereafter as NORM-PPP) is subject to...

BACKGROUND Treatments for cancer spinal metastasis were always palliative. This study was conducted to investigate the safety and effectiveness of IG-IMRT for these patients. METHODS 10 metastatic lesions were treated with conventionally-fractionated IG-IMRT. Daily kilovoltage cone-beam computed tomography (kV-CBCT) scan was applied to ensure accurate positioning. Plans were evaluated by the ...

Abstract The final overarching task we have identified concerns a country’s international positioning in the field of AI. This is slightly different from previous four because it plays out at level influenced to some degree by all them. Myths about AI also exist domain, which are addressed media and companies research institutes. Several issues contextualization an dimension. For example, globa...

Precise point positioning (PPP) technology is mostly implemented with an ambiguity-float solution. Its performance may be further improved by performing ambiguity-fixed resolution. Currently, the PPP integer ambiguity resolutions (IARs) are mainly based on GPS-only measurements. The integration of GPS and GLONASS can speed up the convergence and increase the accuracy of float ambiguity estimate...

The use of robotic systems in logistics has increased the importance precise positioning, especially warehouses. paper presents a system that uses virtual fiducial markers to accurately predict position drone warehouse and count items on rack. A scenario is created simulation environment determine success rate positioning. total 27 racks are lined up center space, 6 × ArUco type marker used eac...