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Objective To compare the efficacy of olopatadine hydrochloride and desloratadine citrate disodium for the treatment of chronic urticaria. Methods A total of 184 patients with chronic urticaria were enrolled at the department of dermatology of Kaifeng People's Hospital from October 2020 to January 2024, and were randomly assigned into the study group (92 cases, olopatadine hydrochloride) and the controls (92 cases, desloratadine citrate disodium). Following one-month treatment, the clinical effective rate, symptom score, dermatology life quality index (DLQI) score and urticaria control test (UCT) score before and after the treatment, and adverse reactions were evaluated in both groups. Results After 1-month treatment, the total clinical effective rates were significantly higher in the study group than in the controls (95.65% vs. 86.96%, χ2=4.38, P=0.036). Moreover, the number and size of skin lesion, and itching severity were markedly lower in the study group (1.02±0.16 vs. 1.13±0.24 for lesion number; 0.88±0.18 vs. 0.96±0.13 for lesion size, and 0.88±0.21 vs. 0.97±0.25 for itching severity, P

The two-dimensional particle image velocimetry (PIV) data are inevitably contaminated by noise due to various imperfections in instrumentation or algorithm, based on which the well-established vortex identification methods often yield noise or incomplete vortex structure with a jagged boundary. To make up this deficiency, a novel method was proposed in this paper and the efficiency of the new method was demonstrated by its applications in extracting the two-dimensional spanwise vortex structures from 2D PIV data in open-channel flows. The new method takes up a single vortex structure by combining model matching and vorticity filtering, and successfully locates the vortex core and draws a streamlined vortex boundary. The new method shows promise as being more effective than commonly used schemes in open-channel flow applications.