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Coupling Scattering Characteristic Analysis of Dihedral Corner Reflectors in SAR Images
摘要： The scattering mechanisms of dihedral corner reflectors have attracted great attention in the past decades. However, the scattering centers of dihedral corners are not discussed systematically. In this paper, the multi-bouncing scattering mechanism of dihedral corners is analyzed in detail based on the scattering characteristics of polygon plates and ray-tracing technique. Furthermore, the coupling scattering center (CSC) is proposed as a detailed explanation of the multi-bouncing scattering mechanism of dihedral corners and the locations of CSCs in the high-resolution range profile (HRRP) are deduced based on the monostatic-and-bistatic equivalence theorem (MBET). CSCs give a precise description of target structures and can improve the ability of radar target recognition. Finally, simulation results via electromagnetic computation validate the theoretical analysis.
关键词： coupling scattering center (CSC),dihedral corner reflector,Auto Target Recognition (ATR),Synthetic Aperture Radar (SAR)
更新于2025-09-04 15:30:14
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[IEEE 2018 Conference Grid, Cloud & High Performance Computing in Science (ROLCG) - Cluj-Napoca, Romania (2018.10.17-2018.10.19)] 2018 Conference Grid, Cloud & High Performance Computing in Science (ROLCG) - Charged Particle Trajectory Reconstruction Algorithms for Cathode Strip Chambers of the CMS Experiment
摘要： The Large Hadron Collider is delivering a growing luminosity and rate of interactions. This imposes strict requirements on the algorithms used for the reconstruction of charged particle trajectories. We present the results of the improvements achieved in the local reconstruction algorithms used in the cathode strip chambers of the CMS experiment.
关键词： CMS,CSC,reconstruction algorithm,tracking detector
更新于2025-09-04 15:30:14
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A two-year study of diffused retinal pigment epitheliopathy treated with half-dose photodynamic therapy guided by simultaneous angiography and optical coherence tomography
摘要： Objectives Diffused retinal pigment epitheliopathy (DRPE) is not necessarily the same as chronic central serous chorioretinopathy (CSC), but a severe subgroup under the umbrella of chronic CSC. This study was to evaluate the efficacy and safety of half-dose PDT treating DRPE. Methods A retrospective case series design was used. Forty-eight consecutive patients (48 eyes) with DRPE treated with half-dose PDT underwent follow-up at baseline, 3 months, 6 months, 12 months and 24 months. Simultaneous FA, ICGA and OCT were used for the treatment and follow-up. The primary outcomes were the subretinal fluid and best-corrected visual acuity in optical coherence tomography. Results Complete fluid absorption was achieved in 95.8% of eyes at 3 months and 100.0% of eyes at 24 months. The baseline logarithm of the minimum angle of resolution (logMAR) BCVA, which was 0.51 ± 0.36, significantly improved to 0.43 ± 0.38 (p < 0.001) at 6 months. The boost continued to 0.29 ± 0.37 (p < 0.001) at 12 months and 0.19 ± 0.39 (p < 0.001) at 24 months. The integrities of the ellipsoid zone (EZ) and interdigitation zone (IZ) improved throughout. Regression analyses showed the BCVA in logMAR was inversely correlated with the EZ (p < 0.01) and IZ (p < 0.01). The recurrence rate was 6.3%. No severe complications were witnessed. Conclusions In 48 eyes with DRPE, simultaneous angiography and OCT facilitated a more comprehensive guidance for half-dose PDT treatment and follow-up. The BCVA improvement occurred at 6 months, which may be attributed to the restoration of the outer retinal structure.
关键词： chronic central serous chorioretinopathy,half-dose photodynamic therapy,Diffused retinal pigment epitheliopathy,angiography,CSC,optical coherence tomography,OCT,DRPE,PDT
更新于2025-09-04 15:30:14