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RISS 인기검색어
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- 저자 : Huaming Ding (검색결과 2 건)
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Improved Maximum Correntropy Unscented Kalman Filter for Spacecraft Attitude Estimation
Shuai Chu,Huaming Qian,Peng Ding 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.6
In this article, an improved maximum correntropy unscented Kalman filter (IMCUKF) is proposed for the problem of mutation and non-Gaussian noise in the spacecraft attitude estimation system. The IMCUKF proposed in this paper transforms the above problem into a nonlinear regression problem, which is achieved by establishing a robust filter based on the maximum correntropy criterion and adaptively adjusting the prior covariance using an adaptive fading factor. In particular, the IMCUKF uses the Cauchy kernel function instead of the Gaussian kernel function to solve the problem that the maximum correntropy Kalman filter is easy to collapse due to the emergence of singular matrices. In addition, this paper applies the additive quaternion property to derive the Kalman filter gain to satisfy the constraint of quaternion normalization. Simulation results demonstrate the superiority of the proposed algorithm as compared with the existing filtering algorithm with the measurement outliers, state mutations, and non-Gaussian noises.
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Yongyong Liang,Huaming Ding 대한외과학회 2023 Annals of Surgical Treatment and Research(ASRT) Vol.104 No.2
Purpose: Severe acute pancreatitis (SAP) is a life-threatening inflammatory syndrome of the pancreas. This study aimed to analyze the clinical significance of runt-associated transcription factor 3 (RUNX3 ) and fibroblast growth factor receptor 2 (FGFR2 ) expression alterations in SAP. Methods: This study included 18 SAP patients in Wuzhong People’s Hospital from November 2019 to December 2021 and 18 healthy controls. RUNX3 and FGFR2 expression levels were determined by RT-quantitative PCR. Correlations between RUNX3 /FGFR2 and sex, age, etiology, CRP, procalcitonin, AST, LDH, BUN, Acute Physiology and Chronic Health Evaluation II (APACHE II), Ranson score, Bedside Index for Severity in Acute Pancreatitis (BISAP) score, sequential organ failure assessment (SOFA), and modified computed tomography severity index (MCTSI) score were analyzed. Diagnostic values of RUNX3 and FGFR2 in SAP were analyzed using the receiver-operating characteristic curve. The binding of RUNX3 to FGFR2 was analyzed by chromatin immunoprecipitation. Results: RUNX3 and FGFR2 were downregulated in peripheral blood of SAP patients. RUNX3 and FGFR2 were negatively correlated with CRP, procalcitonin, AST, LDH, BUN, APACHE II score, Ranson score, BISAP score, SOFA score, and MCTSI score. Sensitivity and specificity of RUNX3 level of <0.9650 for SAP diagnosis were 88.89% and 72.22%, respectively. Sensitivity and specificity of FGFR2 level of <0.8950 for SAP diagnosis were 66.67% and 83.33%, respectively. RUNX3 was enriched in the FGFR2 promoter and was positively correlated with FGFR2 . Conclusion: RUNX3 and FGFR2 were downregulated in peripheral blood of SAP patients and served as candidate biomarkers for SAP diagnosis. RUNX3 bound to the FGFR2 promoter to promote FGFR2 transcription.
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