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Effect of grinding depth on the rotating bending fatigue properties of 40Cr steel

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES 2022年第4期45卷 1292-1295页

作者： Zhou, Honggen Chen, Jianzhi Bai, Xiaoxiang li, Guochao Guan, Xiaoyan Du, Qin li, Ning Jing, xuwen Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212003 Jiangsu Peoples R China Beijing North Vehicle Grp Co Ltd Beijing Peoples R China

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Multi-scale Feature Fusion Extraction Structure for the Leather Defect Detection Algorithm 6

Multi-scale Feature Fusion Extraction Structure for the Leat...

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6th IEEE International Conference on Pattern Recognition and Artificial Intelligence, PRAI 2023

作者： He, xuwen li, Hao Huang, Zihan Xiong, Xiaorui liu, Yifan Yao, Yuting Wuhan Polytechnic University School of Mathematics and Computer Science Wuhan China

ISBN: (纸本)9798350325485

Detection of surface defects using computer vision is a pivotal technology for achieving intelligent manufacturing. Leather products are one of the most widely traded goods in the world, and automatic identification, localization, and detection of surface defects in leather are indispensable for achieving intelligent manufacturing of leather products. This research paper proposes FG-DETR, a multi-scale feature fusion extraction structure for small target detection algorithms. Given the recent success of deep learning methods in various related fields and that certain defects and flaws in leather pictures in our dataset are relatively small. FG-DETR is based on DETR with some improvements as follows, Initially, DETR's ResNet50 network performs feature extraction on the original image and produces four scales of feature maps. Second, we apply a modified Feature Pyramid Network (FPN) to downsample and upsample the four scales of feature maps, followed by the fusion and output of a single feature map. A Gaussian kernel and output then process the fused feature maps as the final feature maps. Finally, the feature maps are merged with the position encoding information and combined into the Transformer encoder-decoder architecture, resulting in the detection outcomes through the Position-wise Feed-Forward Networks (FFN). In our leather dataset, the FG-DETR model is more effective in detecting small targets than DETR, as our leather images are large, and the original DETR is nearly ineffective for images with relatively small defects. The average detection accuracy of medium and large targets also improved, with a 7.6 percentage point improvement at AP50. The experimental findings demonstrate that the multi-scale feature fusion extraction structure significantly enhances the detection accuracy of DETR. © 2023 IEEE.

关键词： Computer vision

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Microvibration streaming measurements using dynamic compressed sensing for satellites

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MEASUREMENT SCIENCE AND TECHNOLOGY 2023年第8期34卷 085015-085015页

作者： li, li Zhou, Miaomiao Zhu, Ye Tao, lixuan liang, xuwen Chinese Acad Sci Innovat Acad Microsatellites Shanghai 201204 Peoples R China Shanghai Engn Ctr Microsatellites Shanghai 201204 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

Long-term monitoring of satellite microvibrations generates a significant amount of data streams, placing strain on satellites with limited transmission capacity. To relieve this transmission strain, a dynamic compressed sensing (CS) framework is proposed for measuring satellite microvibrations. Microvibration streams are measured block by block and then reconstructed using a dynamic recovery algorithm. The recovery solution of one block can be used as a priori knowledge for the next block, allowing for faster updates. However, existing dynamic recovery algorithms are only applicable in the real domain and cannot be applied to microvibrations projected on a Fourier basis in the complex domain. In light of this event, the dynamic homotopy algorithm is expanded to the complex domain to deal with microvibration signals that are sparse in the Fourier basis. In comparison to conventional uniform sampling methods, the experimental results show that the dynamic CS with the expanded recovery algorithm can achieve a maximum root-mean-square acceleration (Grms) deviation of 4% in power spectrum density with one-fifth of the sampling points. Compared to recovery algorithms applicable to fixed measurements, the dynamic algorithm can achieve comparable accuracy in about one-third of the computation time. The experimental findings demonstrate the feasibility of satellite microvibrations measurements using dynamic CS.

关键词： satellite microvibration compressed sensing dynamic homotopy algorithm streaming measurement

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Neutrophil-lymphocyte ratio: a correlation study of its effect on magnetic resonance imaging enhancement patterns in spinal parenchymal tuberculosis

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BMC INFECTIOUS DISEASES 2025年第1期25卷 1-9页

作者： Shan, Qiulan Zhang, Le Fu, xuwen Qi, Min Wei, Jialu Gan, Wei Pu, Ying Shen, lingjun li, Xiang Kunming Third Peoples Hosp Yunnan Clin Med Ctr Infect Dis Dept Radiol 319 Wujing Rd Kunming 650041 Yunnan Peoples R China Kunming Third Peoples Hosp Yunnan Clin Med Ctr Infect Dis Dept ICU Kunming 650041 Yunnan Peoples R China Kunming Third Peoples Hosp Yunnan Clin Med Ctr Infect Dis Dept Pharm Kunming 650041 Peoples R China Kunming Third Peoples Hosp Yunnan Clin Med Ctr Infect Dis Dept TB 319 Wujing Rd Kunming 650041 Yunnan Peoples R China

Objective To explore the impact of the neutrophil-lymphocyte ratio (NLR) on magnetic resonance imaging (MRI) enhancement patterns in patients with spinal parenchymal tuberculosis. Methods In this study, a retrospective analysis was conducted on 42 patients diagnosed for the first time with spinal parenchymal tuberculosis at Kunming Third People's Hospital between 2019 and 2024. They were divided into a homogeneous enhancement group and a ring enhancement group based on MRI characteristics and an analysis of their clinical presentations, imaging features and laboratory test results. Results A total of 42 patients were included in the study, with 30 in the ring enhancement group and 12 in the homogeneous enhancement group. The ring enhancement group exhibited a significantly higher proportion of fever, night sweats and limb sensory/motor dysfunction compared with the homogeneous enhancement group (p < 0.05). For laboratory tests, the ring enhancement group showed remarkably elevated peripheral blood neutrophil counts and NLR, along with markedly reduced lymphocyte counts and proportions (p < 0.05). Additionally, the incidence of perilesional oedema was substantially higher in the ring enhancement group than in the homogeneous enhancement group (p < 0.05). Conclusion The NLR may serve as a potential indicator for assessing MRI enhancement patterns in spinal parenchymal tuberculosis, which is beneficial for identifying patients at different pathological stages of the disease. This study provides novel perspectives for clinical diagnosis and treatment while emphasising the need for further research on the application value of the NLR in tuberculosis.

关键词： Spinal parenchymal tuberculosis Neutrophil-lymphocyte ratio Magnetic resonance imaging enhancement patterns Tuberculosis

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Influences of Community Coalescence on the Assembly of Bacterial Communities of the Small-Scale Complex Aquatic System from the Perspective of Bacterial Transmission, Core Taxa, and Co-occurrence Patterns

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MICROBIAL ECOLOGY 2024年第1期87卷 145页

作者： Xu, Huimin Zhang, Yi Fan, Dingyue Meng, Shunlong Fan, limin Song, Chao Qiu, liping li, Dandan Fang, Longxiang liu, Zhuping Bing, xuwen Chinese Acad Fishery Sci Freshwater Fisheries Res Ctr Wuxi 214081 Peoples R China Minist Agr & Rural Affairs Lab Qual & Safety Risk Assessment Aquat Prod Envir Wuxi 214081 Peoples R China Taihu Basin Author Minist Water Resource Water Conservancy Dev Res Ctr Shanghai 200438 Peoples R China Shanghai Ocean Univ Coll Fisheries & Life Sci Shanghai 201306 Peoples R China

Recirculating aquaculture and aquaponics are considered sustainable aquaculture models playing important roles in animal-derived protein supply. In these aquaculture systems, microorganisms are crucial for the system stability. The community coalescence by mixing substances and microorganisms from various microhabitats under hydraulic forces is important for shaping the bacterial communities in these small-scale complex systems. However, the influences of community coalescence on bacterial communities remain rarely revealed in these systems. In this study, aquaponics (APS) and recirculating aquaculture (RAS) systems were set up to explore the bacterial community coalescence across different microhabitats, including water, fish feces, biofilter biofilms, and plant rhizosphere environment. Our results showed that diversity and compositions varied across different microhabitats in both systems. However, bacterial transmissions across these microhabitats differed between systems. The core microbiome of the RAS and APS were formed under community coalescence with the highest contribution of bacterial taxa derived from the fish feces. Nevertheless, the plant rhizosphere bacterial community also contributed to the core microbiome of the APS. Furthermore, the core taxa showed a higher average degree than the other nodes in the bacterial community networks in all microhabitats except for the plant rhizosphere environment, implying the important roles of core taxa in maintaining these bacterial community networks. Our results provide new insights into the assembly of bacterial communities under community coalescence in the artificial aquatic ecosystems comprising complex microhabitats, which is vital for developing microbial solutions for regulating the microbial communities to improve system performance in the future.

关键词： Aquaponics Microhabitats Community coalescence Bacterial transmission Core taxa Co-occurrence network

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Nomogram to screen older adult patients attending the radiology department for sarcopenia

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BMC GERIATRICS 2025年第1期25卷 1-9页

作者： Yuan, Guiying Ye, Guoxi Hu, Jianguang Hu, Huimin Shi, Chanmei Zhang, Ye Huang, Junbing li, Zhiqiong Zeng, xuwen Tan, Rongshao Xiong, Yuchao Jinan Univ Guangzhou Red Cross Hosp Dept Resp Guangzhou Peoples R China Jinan Univ Guangzhou Red Cross Hosp Dept Radiol 396 Tongfu Rd Guangzhou Guangzhou 510220 Guangdong Provi Peoples R China Jinan Univ Guangzhou Red Cross Hosp Dept Nephrol Guangzhou Peoples R China Jinan Univ Guangzhou Red Cross Hosp Inst Dis Oriented Nutr Res Dept Clin Nutr Guangzhou Peoples R China

BackgroundSarcopenia is an age-related syndrome that can impact the physical and mental health of older adults. However, it is often overlooked in clinical practice. Therefore, we aim to construct a nomogram based on simplified discriminant parameters for screening older adult patients for sarcopenia *** cross-sectional study included 654 patients aged >= 60 years who underwent an examination in the radiology department between October 2023 and June 2024. Patients were diagnosed with sarcopenia according to the method and cutoff value criteria proposed the Asian Working Group on Sarcopenia (AWGS) 2019 criteria. Calf circumference (CC), SARC-F score, mid-upper arm circumference (MUAC), and SARC-CalF score were used as simplified discriminant parameters for sarcopenia. The discriminative ability of these parameters for sarcopenia was assessed using receiver operating characteristic analysis. Additionally, we included each screening parameter and evaluated it's important for screening for the presence of sarcopenia via univariate and multivariate logistic regression analysis to develop a new screening nomogram model. The performance of the nomogram was evaluated using receiver operating characteristic curves, and the performance of the nomogram model was compared to that of CC, SARC-F, MUAC, and the SARC-CalF using the Delong *** the 654 subjects, 120 (18.3%) were diagnosed with sarcopenia, and the areas under the curve (AUCs) of the CC, SARC-F, MUAC, and SARC-CalF were 0.73, 0.61, 0.66, and 0.70, respectively. The multivariate analysis results revealed that older age, male sex, low CC, low MUAC, and low strength were related to sarcopenia. A nomogram model constructed with these five variables had an AUC of 0.84. The DeLong test showed that the diagnostic efficacy of the joint model was significantly higher than that of CC, SARC-F, MUAC, and *** simple nomogram based on simplified discriminant parameters offers personalized

关键词： Sarcopenia Nomogram Calf circumference SARC-F SARC-CalF

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Along-Strike Morphologic Variations of the Kyushu-Palau Ridge at 13°-17° N and Their Tectonic Implications

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RUSSIAN JOURNAL OF PACIFIC GEOLOGY 2024年第2期18卷 220-232页

作者： li, Panfeng Qin, xuwen Zhang, Yong Shang, Luning Shi, Xianyao Hu, Gang Lu, Kai Hou, Fanghui Lv, Wenchao liu, Jia li, Xia Du, Runlin Cong, Jingyi Yang, Yuan China Geol Survey Qingdao Inst Marine Geol Qingdao 266237 Peoples R China Minist Nat Resources Inst Oceanog 2 Key Lab Submarine Geosci Hangzhou 310012 Peoples R China Laoshan Lab Lab Marine Mineral Resources Qingdao 266237 Peoples R China China Geol Survey Beijing 100037 Peoples R China Ocean Univ China Sch Marine Earth Sci Qingdao 266100 Peoples R China

The paper provides a detailed description of the topographical distribution characteristics, along-strike morphologic variations, and tectonic implications of the Kyushu-Palau Ridge (KPR) in the 13 degrees-17 degrees N regions. The description is based on multibeam bathymetric data that was recently collected in the mid-southern segment of KPR and its surrounding areas. The findings indicate that the KPR in the studied region comprises several discontinuous seamounts and seamount chains. Along the ridge running from east to west, there is significant variation in the topography of the seafloor. Visible on this ridge are numerous deep-sea depressions and apparent topographical discontinuities. Geological tectonic processes such as plate subduction and seafloor spreading largely determine the topography of the seafloor. During the beginning of the Parece Vela Basin (PVB) spreading, the pre-existing volcanic arcs fractured under east-west extensional stress, resulting in the development of prominent seamounts, sharp ridges, relief alternations, and rift basins in the KPR. The east-west stress was subsequently transmitted to the weak and inactive mid-ocean ridge in the West Philippine Basin (WPB), which was reactivated and resulted in an episode of magma-poor spreading during 30-26 Ma. This episode caused the KPR to move eastward, stretched, and destroyed its pre-existing structure.

关键词： topographic features variability tectonic landforms tectonic genesis the Kyushu-Palau Ridge

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Development of an Interactive Medical Knowledge Graph Based Tool Set 10

Development of an Interactive Medical Knowledge Graph Based ...

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10th International Conference on Information Technology and Quantitative Management, ITQM 2023

作者： Xu, Xiaowei Wang, xuwen Wu, Meng Ma, Hetong Shen, liu li, Jiao Institute of Medical Information and Library Chinese Academy of Medical Sciences Peking Union Medical College Beijing100020 China Key Laboratory of Medical Information Intelligent Technology Chinese Academy of Medical Sciences Beijing100020 China

The field of clinical research has reached a turning point in terms of the range and diversity of available data and their potential to improve human health and well-being. However, due to discipline-specific variances in terminology and representation, the data is often compartmentalized, disorganized, and inaccessible to a broad audience. In response to these challenges, we designed and evaluated a pilot knowledge graph-based MedKaaS tool capable of integrating existing clinical datasets and translating those data into insights intended to augment human reasoning and accelerate scientific research. In this paper, we present the architecture and performance of our system, which has been applied to several real-world use cases in collaboration with subject-matter specialists. The MedKaaS Tools are actively developed, with regular updates to performance and features. Our future plans include developing a more user-friendly interface and expanding the visualization capabilities for knowledge exploration. © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://***/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Tenth International Conference on Information Technology and Quantitative Management.

关键词： Clinical research

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A synergistic water-saving strategy combining stage-specific irrigation and application of exogenous thiamine enhances drought resistance of Xinjiang cotton

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PLANT AND SOIL 2025年 1-14页

作者： Zhao, Fuxiang Xia, linjie Sun, Simin li, Hang Rong, Yuxuan Wang, Yuxin Wang, xuwen Kong, Xianhui Zhu, Longfu Zhang, Xianlong Yu, Yu Yang, Xiyan Xinjiang Acad Agr & Reclamat Sci Cotton Inst Shihezi 832000 Xinjiang Peoples R China Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Peoples R China Hubei Hongshan Lab Wuhan Peoples R China

Background and aimsXinjiang is the largest cotton planting area in China. However, the perennial water shortage in Xinjiang restricts the development of the cotton industry, making drought one of the important limiting factors. The aim of this study was to evaluate the effectiveness of water-saving scheme and thiamine (Thi) application on alleviating the adverse effects of drought stress on the growth and development of *** this study, five Xinjiang-released cotton varieties (Jinken1775, Jinken1565, Huamian702, Zhongmian979, and Jinfeng2) were selected as the research object, and Xinluzao8 served as the drought-sensitive control. Comprehensive drought resistance index (D) of the drought resistance coefficient (DRC) of four yield and four quality traits were used to evaluate the drought resistant ability of the six cotton varieties under different water conditions and Thi spraying *** stage-specific irrigation strategy (60% during vegetative vs. 90% during the flowering and boll stage) concurrently maintained higher drought resistance across cultivars, with Jinken1565 exhibited the highest drought resistance. This scheme reduced irrigation by 26% while sustaining fiber quality. Exogenous 50 mM Thi further enhanced drought tolerance, reducing transpiration rate by 33% and blade damage by 55%. These results demonstrate that stage-specific water management optimizes drought adaptation in cotton cultivation under drought *** study suggests that a 26% water-saving scheme was proposed for most drought-resistant varieties planted in Xinjiang, and an appropriate scheme to achieve stable yield by Thi application during the early drought condition was proposed for varieties with low drought resistant ability.

关键词： Cotton Drought resistance Comprehensive drought resistance index Thiamine Water saving scheme

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Determination of IgG by electron spin resonance spectroscopy using Fe₃O₄ nanoparticles as probe

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MICROCHEMICAL JOURNAL 2018年 141卷 444-450页

作者： Tian, Sizhu Jiang, Jia Zang, Shuang Wang, Kun Yu, Yong li, xuwen Zhang, Hanqi Yu, Aimin Zhang, Ziwei Jilin Univ Coll Chem Qianjin St 2699 Changchun 130012 Jilin Peoples R China Jilin Univ Coll Instrumentat & Elect Engn West Minzhu St 938 Changchun 130061 Jilin Peoples R China

A novel electron spin resonance (ESR) spectroscopy method for determination of rabbit IgG was presented. Anti rabbit IgG antibody was bound to Fe3O4 nanoparticles (FeNPs). The FeNPs were used as probe to give ESR signal. After the optimization of the assay, a molar ratio 500:1 of antibody to FeNPs was selected. The sepharose beads were used as solid phase and used to separate the analyte from the sample solution. Two typical immunoassay formats, sandwich and competitive formats, were applied to the determination of IgG. The analytical sensitivities obtained by sandwich and competitive formats were 0.13 mu g mL(-1) and 0.56 mu g mL(-1), respectively. The two formats were applied to the determination of the rabbit IgG in rabbit serum. The diluted sample was directly analyzed and other additional sample treatment was not required. The analytical results of the spiked samples indicated that the recoveries of the analytes were acceptable. Furthermore, the sample preparation time used in this method is shorter than most existing immunoassay methods.

关键词： Electron spin resonance Sandwich Competitive Fe3O4 nanoparticles Sepharose beads Rabbit serum

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