Space-sharing Strategies for Storage Yard Management in a Transshipment Hub Port

Ph.DDOCTOR OF PHILOSOPH

Learn to Cluster Faces with Better Subgraphs

Face clustering can provide pseudo-labels to the massive unlabeled face data and improve the performance of different face recognition models. The existing clustering methods generally aggregate the features within subgraphs that are often implemented based on a uniform threshold or a learned cutoff position. This may reduce the recall of subgraphs and hence degrade the clustering performance. This work proposed an efficient neighborhood-aware subgraph adjustment method that can significantly reduce the noise and improve the recall of the subgraphs, and hence can drive the distant nodes to converge towards the same centers. More specifically, the proposed method consists of two components, i.e. face embeddings enhancement using the embeddings from neighbors, and enclosed subgraph construction of node pairs for structural information extraction. The embeddings are combined to predict the linkage probabilities for all node pairs to replace the cosine similarities to produce new subgraphs that can be further used for aggregation of GCNs or other clustering methods. The proposed method is validated through extensive experiments against a range of clustering solutions using three benchmark datasets and numerical results confirm that it outperforms the SOTA solutions in terms of generalization capability

Thyroid function and associated mood changes after COVID-19 vaccines in patients with Hashimoto thyroiditis

ContextSevere acute respiratory syndrome-coronavirus 2 (COVID-19) vaccines may incur changes in thyroid functions followed by mood changes, and patients with Hashimoto thyroiditis (HT) were suggested to bear a higher risk.ObjectivesWe primarily aim to find whether COVID-19 vaccination could induce potential subsequent thyroid function and mood changes. The secondary aim was to find inflammatory biomarkers associated with risk.MethodsThe retrospective, multi-center study recruited patients with HT receiving COVID-19–inactivated vaccines. C-reactive proteins (CRPs), thyroid-stimulating hormones (TSHs), and mood changes were studied before and after vaccination during a follow-up of a 6-month period. Independent association was investigated between incidence of mood state, thyroid functions, and inflammatory markers. Propensity score–matched comparisons between the vaccine and control groups were carried out to investigate the difference.ResultsFinal analysis included 2,765 patients with HT in the vaccine group and 1,288 patients in the control group. In the matched analysis, TSH increase and mood change incidence were both significantly higher in the vaccine group (11.9% versus 6.1% for TSH increase and 12.7% versus 8.4% for mood change incidence). An increase in CRP was associated with mood change (p< 0.01 by the Kaplan–Meier method) and severity (r = 0.75) after vaccination. Baseline CRP, TSH, and antibodies of thyroid peroxidase (anti-TPO) were found to predict incidence of mood changes.ConclusionCOVID-19 vaccination seemed to induce increased levels and incidence of TSH surge followed by mood changes in patients with HT. Higher levels of pre-vaccine serum TSH, CRP, and anti-TPO values were associated with higher incidence in the early post-vaccine phase

Effects of B-site Co2O3 doping on microstructure and electrical properties of Na0.25K0.25Bi2.5Nb2O9 ceramics

The effects of cobalt addition on the properties of Na0.25K0.25Bi2.5Nb2O9 (NKBN) ebased ceramics have been investigated in details. It was found that the ceramics possess a pure phase of bismuth oxide layer etype structure. The Curie temperature T-c gradually increases from 653 degrees C to 662 degrees C with increasing the Co modification. The electrical properties of NKBNebased ceramics are improved significantly by the addition of Co. The piezoelectric constant d33, dielectric loss tan d, mechanical quality factor Q(m) and remanent polarization Pr for the NKBN ceramics with 0.20 wt% Co2O3 modification were found to be 23 pC/N, 0.35%, 3028, 12.03 mC/cm(2), respectively. Thermal annealing studies indicated that the cobalt emodified NKBN ceramics system possesses stable piezoelectric properties, demonstrating that the cobaltemodified NKBNebased ceramics are the promising candidates for highetemperature applications. (C) 2015 Elsevier B.V. All rights reserved

Sintering and characterisation of Gd3Al3Ga2O12/Y3Al5O12 layered composite scintillation ceramic

A novel layered GGAG/YAG composite scintillation ceramic can be prepared at 1650 degrees C using an easily accessible preparation procedure. The oxygen sintering-hot isostatic pressing method implemented in this work can significantly shorten the preparation period of scintillation ceramics. The ceramic exhibits regular grain microstructure. Interface of the composite ceramic is clean and straight. As prepared, the layered Ce:GGAG/Cr:YAG composite ceramic can emit a broad range of photons with wavelength from 500 to 750 nm under excitation. The integral spectra is composed of three parts: emitted photons of Cr:YAG and Ce:GGAG and emitted light of Cr:YAG excitated by the photons emitted by the Ce:GGAG ceramic layerprepared by the proposed method. The method accomplished in this work can significantly improve the exploration of full spectrum scintillation/luminescence ceramics preparation and spectra designation. (C) 2016 Elsevier Ltd. All rights reserved

Preparation and luminescent properties of highly transparent Y3Ga5O12:M3+ (M = Dy, Cr) ceramics

Preparation and luminescent properties of highly transparent Y3Ga5O12:M3+ (M = Dy, Cr) ceramic