Existing remaining useful life (RUL) prediction methods considering multi-source variability were not applicable to the situation that the uneven measurement interval distribution and inconsistent measurement frequency of degrading equipment. This type of method also has ignored the variability of adaptive drift in the future degradation process. In view of this, based on adaptive Wiener process, the paper proposes a new nonlinear degradation method of the RUL prediction. Firstly, adopting the adaptive Wiener process, we have constructed the nonlinear degradation model with multi-source variability, which randomness of the parameters in the nonlinear function. Secondly, the real-time estimation of multiple hidden states can be realized by the particle filter algorithm. It has derived the RUL distribution in the sense of first hitting time. Using monitoring data of degrading equipment, the adaptive update of model parameters was implemented by expectation maximization algorithm. Finally, the effectiveness and superiority of the proposed model are validated through numerical simulation and lithium-ion battery experiments. The results show that it can effectively improve the prediction accuracy, which has potential application value.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11367272 | PMC |
http://dx.doi.org/10.1016/j.heliyon.2024.e35925 | DOI Listing |
Biomed Phys Eng Express
January 2025
Department of Health Science and Technology, Aalborg University, Selma Lagerløfs Vej 249, Aalborg, 9260, DENMARK.
Unlabelled: Fetal phonocardiography is a well-known auscultation technique for evaluation of fetal health. However, murmurs that are synchronous with the maternal heartbeat can often be heard while listening to fetal heart sounds. Maternal placental murmurs (MPM) could be used to detect maternal cardiovascular and placental abnormalities, but the recorded MPMs are often contaminated by ambient interference and noise.
View Article and Find Full Text PDFNat Commun
January 2025
Nash Family Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
Glioblastoma (GBM) is a malignant brain tumor with diffuse infiltration. Here, we demonstrate how GBM cells usurp guidance receptor Plexin-B2 for confined migration through restricted space. Using live-cell imaging to track GBM cells negotiating microchannels, we reveal endocytic vesicle accumulation at cell front and filamentous actin assembly at cell rear in a polarized manner.
View Article and Find Full Text PDFTransplant Cell Ther
December 2024
Aflac Blood and Cancer Center, Children's Healthcare of Atlanta, Emory University, Atlanta, GA, USA.
Chronic graft versus host disease (cGVHD), occurs in approximately one in five pediatric allogeneic HCT patients and is a leading cause of late morbidity and mortality. Late effects of HCT may lead to long-term chronic health conditions and shortened life expectancy. In addition to direct physiological challenges from cGVHD and other late-effects, numerous patient-important outcomes impact the quality of life (QOL) of patients and their families.
View Article and Find Full Text PDFPlants (Basel)
November 2024
Xinjiang Production & Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Alar 843300, China.
is a key community-building species in the desert riparian forests of Northwest China, exhibiting exceptional resistance to stress and playing a vital role in soil and water conservation as well as maintaining ecological balance in arid regions. To investigate the ecological processes underlying the composition of communities and to identify their community construction mechanisms, this study analyses the species diversity and phylogenetic diversity of 58 communities, exploring their assembly processes and key influencing factors. This research aims to elucidate the relationship between community structure from the perspective of species evolution and analyse the construction mechanisms of communities across different clusters in arid environments.
View Article and Find Full Text PDFHealth Psychol Behav Med
November 2024
School of Human Medicine, Faculty of Health Sciences, Universidad Peruana Unión (UPeU), Lima, Peru.
Introduction: A sudden cancer diagnosis creates a psycho-emotional and social crisis, making it crucial to manage emotional coping strategies and assess comprehensive health care, addressing both behavioral and practical aspects of patients' daily lives. Although there are instruments that measure strategies for emotional coping, emotional adjustment or post-traumatic growth, we still do not have a questionnaire in Spanish that comprehensively evaluates health self-management.
Aim: This study aims to translate into Spanish and determine the validity and reliability of the Spanish version of the Smart Management Strategy for Health Assessment Tool (SAT-SF) evaluation questionnaire in Peruvian patients with cancer.
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!