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Towards uniform point distribution in feature-preserving point cloud filtering

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Computational Visual Media 2023年第2期9卷 249-263页

作者： Shuaijun Chen jinxi wang Wei Pan Shang Gao Meili wang Xuequan Lu School of Information Technology Deakin UniversityGeelongVIC 3220Australia College of Information Engineering Northwest A&F UniversityYangling 712100China School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou 510641China

While a popular representation of 3D data,point clouds may contain noise and need filtering before *** point cloud filtering methods either cannot preserve sharp features or result in uneven point distributions in the filtered *** address this problem,this paper introduces a point cloud filtering method that considers both point distribution and feature preservation during *** key idea is to incorporate a repulsion term with a data term in energy *** repulsion term is responsible for the point distribution,while the data term aims to approximate the noisy surfaces while preserving geometric *** method is capable of handling models with fine-scale features and sharp *** experiments show that our method quickly yields good results with relatively uniform point distribution.

关键词： point cloud filtering point distribution feature preservation

Anomalous Concentrations of Rare Metal Elements, Rare-scattered(Dispersed) Elements and Rare Earth Elements in the Coal from Iqe Coalfield, Qinghai Province, China

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Acta Geologica Sinica(English Edition) 2015年第1期89卷 229-241页

作者： SUN Yuzhuang ZHAO Cunliang LI Yanheng wang jinxi Key Laboratory of Resource Exploration Research of Hebei Province Hebei University of Engineering Hebei Collaborative Innovation Center of Coal Exploitation Hebei University of Engineering

Total of 23 bench samples were taken from the No. 7 Coal of Iqe Coalfield, Qinghai Province, China, following Chinese Standard Method GB/T 482-2008 （2008）. These samples were analyzed by powder X-ray diffraction （XRD）, inductively coupled plasma mass spectrometry （ICP- MS） and X-ray fluorescence （XRF）. The results indicate that the No. 7 Coal belongs to a low rank （*** =0.659%） and high-ash coal （40.54%）. Compared to common Chinese and world low-rank coals, the lqe coal contains anomalous concentrations of rare metal elements, rare-scattered （dispersed） elements and rare earth elements. The highest contents of Rb, Cs, Ga and REY reach to 180, 26, 37, and 397 ppm, respectively. Their average contents of these elements are 10.9, 15, 4.8 and 3.5 times higher than those of world coals, respectively. Minerals in the coal include kaolinite, quartz, muscovite, siderite, and traces of rutile, and brookite. Kaolinite could be main host minerals of Rb, Cs, Ga and REY. The anomalous rare element Rb and Cs accumulation in the Iqe coal is related to both organic and inorganic matter. The REY concentrations may be related to circulation of thermal solutions, contained or sorbed by clayey particles, and organic matter as well.

关键词： rare metal element rare-scattered elements rare earth element Iqe Coalfield QinghaiProvince

Epigenetic regulation of gene expression in osteoarthritis

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Genes & Diseases 2015年第1期2卷 69-75页

作者： Mingcai Zhang jinxi wang Harrington Laboratory for Molecular Orthopedics Department of Orthopedic SurgeryUniversity of Kansas Medical CenterKansas CityKSUSA Department of Biochemistry&Molecular Biology University of Kansas Medical CenterKansas CityKSUSA

Osteoarthritis(OA)is the most common form of joint disease and the leading cause of chronic disability in middle-aged and older *** development of diseasemodifying therapy for OA currently faces major obstacles largely because the regulatory mechanisms for the function of joint tissue cells remain *** studies have found that the alterations in gene expression of specific transcription factors(TFs),pro-or antiinflammatory cytokines,matrix proteinases and extracellular matrix(ECM)proteins in articular cartilage may be involved in the development of ***,the regulatory mechanisms for the expression of those genes in OA chondrocytes are largely *** recent advances in epigenetic studies have shed light on the importance of epigenetic regulation of gene expression in the development of *** this review,we summarize and discuss the recent studies on the regulatory roles of various epigenetic mechanisms in the expression of genes for specific TFs,cytokines,ECM proteins and matrix proteinases,as well the significance of these epigenetic mechanisms in the pathogenesis of OA.

关键词： Epigenetics Osteoarthritis Transcription factor Cytokine Matrix proteinase

Regulatory role of NFAT1 signaling in articular chondrocyteactivities and osteoarthritis pathogenesis

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BIOCELL 2023年第10期47卷 2125-2132页

作者： MINGCAI ZHANG TANNER CAMPBELL SPENCER FALCON jinxi wang Harrington Laboratory for Molecular Orthopedics Department of Orthopedic SurgeryUniversity of Kansas Medical CenterKansas CityUSA

Osteoarthritis (OA), the most common form of joint disease, is characterized clinically by joint pain, stiffness,and deformity. OA is now considered a whole joint disease;however, the breakdown of the articular cartilage remains themajor hallmark of the disease. Current treatments targeting OA symptoms have a limited impact on impeding orreversing the OA progression. Understanding the molecular and cellular mechanisms underlying OA development isa critical barrier to progress in OA therapy. Recent studies by the current authors’ group and others have revealedthat the nuclear factor of activated T cell 1 (NFAT1), a member of the NFAT family of transcription factors, regulatesthe expression of many anabolic and catabolic genes in articular chondrocytes of adult mice. Mice lacking NFAT1exhibit normal skeletal development but display OA in both appendicular and spinal facet joints as adults. Thisreview mainly focuses on the recent advances in the regulatory role of NFAT1 transcription factor in the activities ofarticular chondrocytes and its implication in the pathogenesis of OA.

关键词： Osteoarthritis Chondrocyte NFAT1 Transcription factor Regulation of gene expression

Frequency and Reliability Analysis of Load-Bearing Composite Beams

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Automotive Innovation 2024年第1期7卷 194-207页

作者： Junlei Wei Lingyu Sun Xinli Gao Wenfeng Pan Jiaxin wang jinxi wang School of Transportation Science and Engineering Beihang University37 Xueyuan RoadHaidian DistrictBeijing 100191China Beijing Key Laboratory for High-Efficient Power Transmission and System Control of New Energy Resource Vehicle Beihang University37 Xueyuan RoadHaidian DistrictBeijing 100191China Beijing Hangshu Vehicle Data Research Institute Co. Ltd.Beijing 100062China

The increasing utilization of fiber-reinforced thermoplastics(FRTPs)as a substitute for metal in load-bearing structures poses challenges related to NVH issues arising from frequency variations and reliability concerns stemming from fiber dispersion within the resin *** this study,the steel automobile seat beam serves as a benchmark for *** beams are designed and fabricated using two distinct processes:compression molding and injection ***,their modal frequency and reliability are meticulously *** investigations are conducted to explore the influence of various factors,including the combination of laminates and ribs,as well as the stacking sequence of laminates,on the modal *** findings reveal that the modal frequency and vibration mode are subject to alterations based on the fiber type,beam material,and laminate stacking ***,in comparison to the steel benchmark,the first-order frequency of the FRTP beam in this study experiences a 6.59%increase while simultaneously achieving a weight reduction of 32.42%.To assess reliability,a comprehensive analysis is performed,considering a six-fold standard *** analysis yields the permissible range of fluctuation for material elastic constants,bending performance,and frequency ***,the FRTP beams meet the required reliability *** results provide valuable insights for comprehending the stiffness-dependent response and effectively controlling structural performance when implementing FRTP for weight reduction purposes.

关键词： Automobile Fiber-reinforced thermoplastics Lightweight design Frequency change Reliability analysis

Genetic factors in intervertebral disc degeneration

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Genes & Diseases 2016年第3期3卷 178-185页

作者： Yi Feng Brian Egan jinxi wang Harrington Laboratory for Molecular Orthopedics Department of Orthopedic SurgeryUSA Department of Biochemistry&Molecular Biology University of Kansas Medical CenterKansas CityKSUSA

Low back pain(LBP)is a major cause of disability and imposes huge economic burdens on human society *** many factors responsible for LBP,intervertebral disc degeneration(IDD)is the most common disorder and is a target for *** etiology of IDD is complex and its mechanism is still not completely *** factors such as aging,spine deformities and diseases,spine injuries,and genetic factors are involved in the pathogenesis of *** this review,we will focus on the recent advances in studies on the most promising and extensively examined genetic factors associated with IDD in humans.A number of genetic defects have been correlated with structural and functional changes within the intervertebral disc(IVD),which may compromise the disc’s mechanical properties and metabolic *** genetic and proteomic studies have begun to shed light on the molecular basis of IDD,suggesting that genetic factors are important contributors to the onset and progression of *** continuing to improve our understanding of the molecular mechanisms of IDD,specific early diagnosis and more effective treatments for this disabling disease will be possible in the future.

关键词： Genetic factor Intervertebral disc Intervertebral disc degeneration Low back pain Polymorphism

Intelligent Fault Diagnosis Method of Rolling Bearings Based on Transfer Residual Swin Transformer with Shifted Windows

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Structural Durability & Health Monitoring 2024年第2期18卷 91-110页

作者： Haomiao wang jinxi wang Qingmei Sui Faye Zhang Yibin Li Mingshun Jiang Phanasindh Paitekul The Institute of Marine Science and Technology Shandong UniversityQingdao26623China The School of Control Sciences and Engineering Shandong UniversityJinan250061China Thailand Institute of Scientific and Technological Research Amphoe Khlong LuangPathum Thani12120Thailand

Due to their robust learning and expression ability for complex features,the deep learning(DL)model plays a vital role in bearing fault ***,since there are fewer labeled samples in fault diagnosis,the depth of DL models in fault diagnosis is generally shallower than that of DL models in other fields,which limits the diagnostic *** solve this problem,a novel transfer residual Swin Transformer(RST)is proposed for rolling bearings in this *** has 24 residual self-attention layers,which use the hierarchical design and the shifted window-based residual *** with transfer learning techniques,the transfer RST model uses pre-trained parameters from ImageNet.A new end-to-end method for fault diagnosis based on deep transfer RST is ***,wavelet transform transforms the vibration signal into a wavelet time-frequency *** signal’s time-frequency domain representation can be represented ***,the wavelet time-frequency diagram is the input of the RST model to obtain the fault ***,our method is verified on public and self-built *** results show the superior performance of our method by comparing it with a shallow neural network.

关键词： Rolling bearing fault diagnosis transformer self-attention mechanism

Pollution of organic compounds and heavy metals in a coal gangue dump of the Gequan Coal Mine, China

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Chinese Journal Of Geochemistry 2013年第3期32卷 241-247页

作者： FAN Jingsen SUN Yuzhuang LI Xinyu ZHAO Cunliang TIAN Duanxin SHAO Longyi wang jinxi Key Laboratory of Hebei Province for Resource Exploration Research Hebei University of Engineering China University of Mining and Technology (Beijing) The Fourth Construction Co. Ltd.of China Electronics System Engineering The Land and Resources Department of Wu'an

Samples around a coal gangue dump of the Gequan Coal Mine were collected in April 2009. GC (gas chromatography) and GC/MS (gas chromatography/mass spectrometry) were employed to analyze the composition of organic matter in the samples. ICP-MS (inductively coupled plasma mass spectrometry) was used to determine the concentrations of heavy metals. The contents of organic extracts are within the range of 140-750 mg/kg. Alkand aro-ratios are relatively high. Compared to those of the background sample (GQ13 ), the contents of saturated hydrocarbon compounds in all the samples are relatively high. The contents of polycyclic aromatic hydrocarbons (PAHs) are relatively high with the distance getting closer to the coal gangue dump. These indicate that organic matter in the samples is from coal particles of the coal gangue dump. The distributions of heavy metals are very similar: the contents decrease with distance from the dump, which indicates that the harmful heavy metals from the coal gangue dump have polluted as thick as at least 500 m.

关键词：重金属污染煤矸石山葛泉煤矿有机化合物电感耦合等离子体质谱法 ICP-MS 气相色谱质谱样品采集

Further Information of the Associated Li Deposits in the No.6 Coal Seam at Jungar Coalfield, Inner Mongolia, Northern China

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Acta Geologica Sinica(English Edition) 2013年第4期87卷 1097-1108页

作者： SUN Yuzhuang ZHAO Cunliang LI Yanheng wang jinxi ZHANG Jianya JIN Zhe LIN Mingyue Wolfgang KALKREUTH Key Laboratory of Resource Exploration Research of Hebei Province Hebei University of Engineering China University of Mining and Technology Instituto de Geociências UFRGS Avenida Bento Gonalves 9500 91501-970 Porto Alegre RS Brazil

Total 138 coal samples and 14 parting samples were taken from the No. 6 Seam of the Jungar Coalfield, Inner Mongolia. These samples were analysed by optical microscopy, sequential chemical extraction procedure （SCEP）, inductively coupled plasma mass spectrometry （ICP-MS）, X-ray powder diffraction （XRD）, and scanning electron microscope in conjunction with an energy-dispersive X-ray spectrometer （SEM-EDX） analysis. The results indicate that the Li contents have reached the industrial grade of the coal associated Li deposit, and the total Li reserves have reached 2406600 tons, that is, 5157000 tons Li2O in the No. 6 seam in the Jungar Coalfield. The sequential chemical extraction procedure results suggest that the Li concentration is mainly related to inorganic matter. The minerals in the coals consist of kaolinite, boehmite, chlorite-group mineral, quartz, calcite, pyrite, siderite and amorphous clay material. Some Li could be absorbed by clay minerals in the Li-bearing coal seam. The chlorite phase？could be？most likely the host for a part of Li. The Yinshan Oldland should be the most possible source of Li of the coal.

关键词： Li deposit industrial grade coal seam geochemistry Jungar Coalfield