154 research outputs found
A Data-Driven Condition Monitoring of Product Quality Analysis System Based on RS and AHP
Mechanical and electrical products have complex structure and intelligent control system, their reliability plays an important role in the normal operation of security facilities. However, most manufacturers usually pay more attention to the product designing and manufacturing quality, with little interest in the intelligent fault diagnosis. The objective of this study is to develop the products quality intelligent analysis and management system based on Rough Set (RS) and Analytic Hierarchy Process (AHP). Firstly, this paper reviews the principle of hardware, software design, monitoring platform and quality analysis system to reduce the number of information transfer with computer technology. Secondly, the fault types and feature extractions of different faults of elevators are presented and simplified by using RS theory. Then, the objective weight of level index model can be obtained by AHP method, and the comprehensive analysis weight of each index is obtained by using the value of subjective and objective weight coefficients with the golden ratio. Finally, a comprehensive decision weight of the major index for quality control analysis system of many vertical elevators is presented. The results show that the data-driven condition monitoring and quality analysis system is a kind of important means to prevent a disaster of complex mechanical and electrical products
DASTSiam: Spatio-Temporal Fusion and Discriminative Augmentation for Improved Siamese Tracking
Tracking tasks based on deep neural networks have greatly improved with the
emergence of Siamese trackers. However, the appearance of targets often changes
during tracking, which can reduce the robustness of the tracker when facing
challenges such as aspect ratio change, occlusion, and scale variation. In
addition, cluttered backgrounds can lead to multiple high response points in
the response map, leading to incorrect target positioning. In this paper, we
introduce two transformer-based modules to improve Siamese tracking called
DASTSiam: the spatio-temporal (ST) fusion module and the Discriminative
Augmentation (DA) module. The ST module uses cross-attention based accumulation
of historical cues to improve robustness against object appearance changes,
while the DA module associates semantic information between the template and
search region to improve target discrimination. Moreover, Modifying the label
assignment of anchors also improves the reliability of the object location. Our
modules can be used with all Siamese trackers and show improved performance on
several public datasets through comparative and ablation experiments
Observations of Magnetic Helicity Proxies in Solar Photosphere: Helicity with Solar Cycles
Observations of magnetic helicity transportation through the solar
photosphere reflect the interaction of turbulent plasma movements and magnetic
fields in the solar dynamo process. In this chapter, we have reviewed the
research process of magnetic helicity inferred from the observed solar magnetic
fields in the photosphere and also the solar morphological configurations with
solar cycles. After introducing some achievements in the study of magnetic
helicity, some key points would like to be summarized.
The magnetic (current) helicity in the solar surface layer presents a
statistical distribution similar to that of the sunspot butterfly diagram, but
its maximum value is delayed from the extreme value of the sunspot butterfly
diagram and corresponds in the phase with the statistical eruption of solar
flares. During the spatial transport of magnetic (current) helicity from the
interior of the sun into the interplanetary space at the time-space scale of
the solar cycle, it shows the statistical distribution and the fluctuation with
the hemispheric sign rule. These show that the current helicity and magnetic
helicity transport calculation methods are complementary to each other.
We also notice that the study of the inherent relationship between magnetic
helicity and the solar cycle still depends on the observed accuracy of the
solar magnetic field.Comment: 48 page,17 figure
Rif1 Maintains Telomere Length Homeostasis of ESCs by Mediating Heterochromatin Silencing
SummaryTelomere length homeostasis is essential for genomic stability and unlimited self-renewal of embryonic stem cells (ESCs). We show that telomere-associated protein Rif1 is required to maintain telomere length homeostasis by negatively regulating Zscan4 expression, a critical factor for telomere elongation by recombination. Depletion of Rif1 results in terminal hyperrecombination, telomere length heterogeneity, and chromosomal fusions. Reduction of Zscan4 by shRNA significantly rescues telomere recombination defects of Rif1-depleted ESCs and associated embryonic lethality. Further, Rif1 negatively modulates Zscan4 expression by maintaining H3K9me3 levels at subtelomeric regions. Mechanistically, Rif1 interacts and stabilizes H3K9 methylation complex. Thus, Rif1 regulates telomere length homeostasis of ESCs by mediating heterochromatic silencing
Exploring the pathogenesis of colorectal carcinoma complicated with hepatocellular carcinoma via microarray data analysis
Background: Despite the increasing number of research endeavors dedicated to investigating the relationship between colorectal carcinoma (CRC) and hepatocellular carcinoma (HCC), the underlying pathogenic mechanism remains largely elusive. The aim of this study is to shed light on the molecular mechanism involved in the development of this comorbidity.Methods: The gene expression profiles of CRC (GSE90627) and HCC (GSE45267) were downloaded from the Gene Expression Omnibus (GEO) database. After identifying the common differentially expressed genes (DEGs) of psoriasis and atherosclerosis, three kinds of analyses were performed, namely, functional annotation, protein‐protein interaction (PPI) network and module construction, and hub gene identification, survival analysis and co-expression analysis.Results: A total of 150 common downregulated differentially expressed genes and 148 upregulated differentially expressed genes were selected for subsequent analyses. The significance of chemokines and cytokines in the pathogenesis of these two ailments is underscored by functional analysis. Seven gene modules that were closely connected were identified. Moreover, the lipopolysaccharide-mediated signaling pathway is intricately linked to the development of both diseases. Finally, 10 important hub genes were identified using cytoHubba, including CDK1, KIF11, CDC20, CCNA2, TOP2A, CCNB1, NUSAP1, BUB1B, ASPM, and MAD2L1.Conclusion: Our study reveals the common pathogenesis of colorectal carcinoma and hepatocellular carcinoma. These common pathways and hub genes may provide new ideas for further mechanism research
Finishing the euchromatic sequence of the human genome
The sequence of the human genome encodes the genetic instructions for human physiology, as well as rich information about human evolution. In 2001, the International Human Genome Sequencing Consortium reported a draft sequence of the euchromatic portion of the human genome. Since then, the international collaboration has worked to convert this draft into a genome sequence with high accuracy and nearly complete coverage. Here, we report the result of this finishing process. The current genome sequence (Build 35) contains 2.85 billion nucleotides interrupted by only 341 gaps. It covers ∼99% of the euchromatic genome and is accurate to an error rate of ∼1 event per 100,000 bases. Many of the remaining euchromatic gaps are associated with segmental duplications and will require focused work with new methods. The near-complete sequence, the first for a vertebrate, greatly improves the precision of biological analyses of the human genome including studies of gene number, birth and death. Notably, the human enome seems to encode only 20,000-25,000 protein-coding genes. The genome sequence reported here should serve as a firm foundation for biomedical research in the decades ahead
A Working memory perspective on language research : models and implications
Working memory ( WM) is a key theoretical concept from cognitive psychology and cognitive neuroscience. It has a great deal to offer research into complex cognitive behaviors such as language. This paper clarifies the concept of WM through comparison with the better known concept of short-term memory,and presents a critical review of four influential WM models which are highly relevant to language research and two common research methodologies. The paper also provides an analysis of the implications of WM theories for research into various fields concerning language,including language acquisition,language comprehension, and interpreting (both spoken and signed).5 page(s
A Research on signed language interpreting - model, content and challenges
The research on signed language interpretation is of great theoretical and practical significance. This paper is an attempt to construct a model for signed language interpretation research (SLIR) in China within the framework of translation studies. The authors propose a three - component model which embraces ontology , epistemology , and applied theories , and analyze the most significant challenges facing SLIR in China.7 page(s
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