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Early chatter identification based on optimized VMD with multi-band information fusion and compression method in robotic milling process

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Chinese Journal of Aeronautics 2024年第6期37卷 464-484页

作者： Sichen chen Zhiqiang LIANG Yuchao DU Zirui GAO Haoran ZHENG Zhibing LIU Tianyang qiu Xibin WANG School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China

Undesirable self-excited chatter has always been a typical issue restricting the improvement of robotic milling quality and *** chatter identification based on processing signals can prompt operators to adjust the machining process and prevent chatter *** with the traditional machine tool,the uncertain multiple chatter frequency bands and the band-moving of the chatter frequency in robotic milling process make it more challenging to extract chatter *** paper proposes a novel method of chatter identification using optimized variational mode decomposition(OVMD)with multi-band information fusion and compression technology(MT).During the robotic milling process,the number of decomposed modes k and the penalty coefficient a are optimized based on the dominant component of frequency scope partition and fitness of the mode center ***,the mayfly optimization algorithm(MA)is employed to obtain the global optimal parameter *** order to conquer information collection about the uncertain multiple chatter frequency bands and the band-moving of the chatter frequency in robotic milling process,MT is presented to reduce computation and extract signal ***,the cross entropy of the image(CEI)is proposed as the final chatter indicator to identify the chatter *** robotic milling experiments are carried out to verify the proposed method,and the results show that it can distinguish the robotic milling condition by extracting the uncertain multiple chatter frequency bands and overcome the band-moving of the chatter frequency in robotic milling process.

关键词： Robotic milling Chatter detection Variational mode decomposition Information fusion and compression Chatter featur

Deep eutectic solvent-driven self-assembly of metal mercaptide complexes with enzyme-mimicking activities for detection of uric acid through one-step cascade catalytic reaction

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Green Chemical Engineering 2024年第1期5卷 75-84页

作者： Jean Claude Munyemana Jia chen Xin Li Yangxia Han Hao Tang Hongdeng qiu CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing100039China Department of Pharmacy Gansu Provincial HospitalLanzhou730000China

This work presents a generic strategy to create a series of metal mercaptides complexes via coordination selfassembly between transition metals(Mn,Cu,Co,Fe,and Ni)and cysteine(Cys)by forming the sulfur-metal *** strategy involves dissolving metal chlorides and Cys into deep eutectic solvents(DES),followed by the precipitation of metal mercaptides complexes(such as Cys-Mn)by adding water as an antisolvent,where DES serves as the solvent,shape directing,and capping agent,thereby preventing the formation of other metal ***,the prepared complexes possess both laccase and peroxidase-like properties,allowing the design of a technique for the detection of L-3,4-dihydroxyphenylalanine(L-DOPA)and uric acid,*** prepared Cys-Mn can linearly oxidize L-DOPA with its concentrations from 0.1 to 130μM and the detection limit was calculated to be 75.5 n ***,the Cys-Mn can mimic the activity of peroxidase towards oxidization of o-phenylenediamine at neutral p H,allowing single-step and one-pot cascade reactions for visual and fluorometric measurements of uric acid(UA)that could work in the range of 0.2-500μM UA with a detection limit of 0.06μM and 0.054μМ,*** assay was successful in detecting UA in serum and urine samples with relative standard deviation(RSD)ranging from 7.3%to 10.2%and 3.0%-8.5%respectively,suggesting that it may prove useful in medical diagnostic testing.

关键词： Metal-mercaptides Deep eutectic solvents Self-assembly Peroxidase-mimic catalyst Uric acid detection

A robust & weak-nucleophilicity electrocatalyst with an inert response for chlorine ion oxidation in large-current seawater electrolysis

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Journal of Energy Chemistry 2024年第3期90卷 486-495,I0011页

作者： Junting Dong Chang Yu Hui Wang Lin chen Hongling Huang Yingnan Han Qianbing Wei Jieshan qiu State Key Laboratory of Fine Chemicals Frontier Science Center for Smart MaterialsSchool of Chemical EngineeringDalian University of TechnologyDalian 116024LiaoningChina College of Chemical Engineering State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing 100029China

Seawater splitting into hydrogen,a promising technology,is seriously limited by the durability and tolerance of electrocatalysts for chlorine ions in seawater at large current densities due to chloride oxidation and ***,we present a robust and weak-nucleophilicity nickel-iron hydroxide electrocatalyst with excellent selectivity for oxygen evolution and an inert response for chlorine ion oxidation which are key and highly desired for efficient seawater *** a weak-nucleophilicity electrocatalyst can well match with strong-nucleophilicity OH-compared with the weak-nucleophilicity Cl^(-),resultantly,the oxidation of OH-in electrolyte can be more easily achieved relative to chlorine ion oxidation,confirmed by ethylenediaminetetraacetic acid disodium probing ***,no strongly corrosive hypochlorite is produced when the operating voltage reaches about 2.1 V ***,a potential that is far beyond the thermodynamic potential of chlorine ion oxidatio *** concept and approach to reasonably designing weaknucleophilicity electrocatalysts that can greatly avoid chlorine ion oxidation under alkaline seawater environments can push forward the seawater electrolysis technology and also accelerate the development of green hydrogen technique.

关键词： Nickel-iron hydroxide electrocatalysts Highly selective seawater electrolysis Weak nucleophilicity Oxygen evolution reaction Hydrogen

Mapping upland crop–rice cropping systems for targeted sustainable intensification in South China

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The Crop Journal 2024年第2期12卷 614-629页

作者： Bingwen qiu Linhai Yu Peng Yang Wenbin Wu Jianfeng chen Xiaolin Zhu Mingjie Duan Key Laboratory of Spatial Data Mining&Information Sharing of Ministry of Education Academy of Digital China(Fujian)Fuzhou UniversityFuzhou 350116FujianChina Key Laboratory of Agricultural Remote Sensing Ministry of Agriculture and Rural AffairsBeijing 100081China Department of land Surveying and Geo-Informatics The Hong Kong Polytechnic UniversityKowloon 999077Hong KongChina

Upland crop-rice cropping systems(UCR)facilitate sustainable agricultural *** UCR cultivation mapping is needed to ensure food security,sustainable water management,and rural ***,datasets describing cropping systems are limited in spatial coverage and crop *** UCR is more challenging than crop identification and most existing approaches rely heavily on accurate phenology calendars and representative training samples,which limits its applications over large *** describe a novel algorithm(RRSS)for automatic mapping of upland crop-rice cropping systems using Sentinel-1 Synthetic Aperture Radar(SAR)and Sentinel-2 Multispectral Instrument(MSI)*** indicator,the VV backscatter range,was proposed to discriminate UCR and another two indicators were designed by coupling greenness and pigment indices to further discriminate tobacco or oilseed *** RRSS algorithm was applied to South China characterized by complex smallholder rice cropping systems and diverse topographic *** study developed 10-m UCR maps of a major rice bowl in South China,the Xiang-Gan-Min(XGM)*** performance of the RRSS algorithm was validated based on 5197 ground-truth reference sites,with an overall accuracy of 91.92%.There were7348 km^(2) areas of UCR,roughly one-half of them located in *** UCR was represented mainly by oilseed-UCR and tobacco-UCR,which contributed respectively 69%and 15%of UCR *** patterns accounted for only one-tenth of rice production,which can be tripled by intensification from single rice *** to complex and fragmented subtropical regions suggested the spatiotemporal robustness of the RRSS algorithm,which could be further applied to generate 10-m UCR datasets for application at national or global scales.

关键词： Cropping-pattern mapping Paddy rice Sentinel-1/2 China Sustainable intensification

Sustained remission of Cronkhite-Canada syndrome after corticosteroid and mesalazine treatment: A case report

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World Journal of Clinical Cases 2024年第14期12卷 2431-2437页

作者： Ya-lan chen Rui-Yao Wang Ling Mei Ran Duan Department of Gastroenterology The Affiliated Hospital of Hebei UniversityBaoding 071000Hebei ProvinceChina Department of Thoracic Surgery The Affiliated Hospital of Hebei UniversityBaoding 071000Hebei ProvinceChina Department of Medical Imageology The Affiliated Hospital of Hebei UniversityBaoding 071000Hebei ProvinceChina

BACKGROUND Cronkhite-Canada syndrome(CCS)is a rare disease of unknown *** optimal treatment for CCS remains *** with corticosteroids is considered the mainstay treatment because of its high efficacy,but the therapeutic strategy for steroid-resistant CCS is not yet *** SUMMARY This is the case of an 81-year-old woman who was diagnosed with *** her severe diarrhea,nausea,vomiting,and hypoproteinemia,hormone therapy(40 mg/d)was administered,and the symptoms improved within 1 *** 3 mo,the patient had no obvious *** polyps were significantly reduced on review gastroscopy and colonoscopy,thus hormone reduction gradually *** hormone level was maintained at 10 mg/d after 6 *** the age of the patient and the side effects of hormones,the patient had no obvious ***,hormone drugs were discontinued,and mesalazine was administered orally at 3 g/*** patient's symptoms continued to improve after a follow-up of 5 *** Corticosteroids and mesalazine are potential treatment options for CCS.

关键词： Cronkhite-Canada syndrome Corticosteroids Mesalazine Gastrointestinal polyposis Case report

Tissue optical clearing enhances efficacy of vascular targeted photodynamic therapy of mouse dorsal skin

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Journal of Innovative Optical Health Sciences 2024年第2期17卷 67-78页

作者： Ying Liu qiushi Wang Yidi Liu Ying Wang Haixia qiu Dan Zhu Ying Gu Defu chen School of Optics and Photonics Beijing Institute of TechnologyBeijing 100081P.R.China School of Medical Technology Beijing Institute of TechnologyBeijing 100081P.R.China Department of Laser Medicine First Medical Center of PLA General HospitalBeijing 100853P.R.China Britton Chance Center for Biomedical Photonics-MoE Key Laboratory for Biomedical Photonics A duanced Biomedical Imaging FacilityWuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074HubeiP.R.China Precision Laser Medical Diagnosis and Treatment Innovation Unit Chinese A cademy of Medical SciencesBeijing 100000P.R.China

Vascular-targeted photodynamic therapy(V-PDT)is an effective treatment for port wine stains(PWS).However,repeated treatment is usually needed to achieve optimal treatment outcomes,possibly due to the limited treatment light penetration depth in the PWS *** optical clearing technique can increase light penetration in depth by reducing light *** study aimed to investigate the V-PDT in combination with an optical clearing agent(OCA)for the therapeutic enhancement of V-PDT in the rodent skinfold window chamber *** responses were closely monitored with laser speckle contrast imaging(LSCI),optical coherence tomography angiography,and stereo microscope before,during,and after the *** further quantitatively demonstrated the effects of V-PDT in combination with OCA on the blood flow and blood vessel size of skin *** combination of OCA and V-PDT resulted in significant vascular damage,including vasoconstriction and the reduction of blood *** results indicate the promising potential of OCA for enhancing V-PDT for treating vascular-related diseases,including PWS.

关键词： Vascular-targeted photodynamic therapy(V-PDT) optical clearing agent(OCA) treatment efficacy enhancement skin-fold window chamber port wine stains

Iodine Nutrition, Thyroid-stimulating Hormone, and Related Factors of Postpartum Women from three Different Areas in China: A Cross-sectional Survey

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Biomedical and Environmental Sciences 2024年第3期37卷 254-265页

作者： SHAN Xiao Yun ZOU Yan HUANG Li Chun JIANG Shan ZHOU Wei Wen QIN qiu lan LIU Chang Qing LUO Xiao Yan LU Jia Xi MAO De Qian LI Min YANG Zhen Yu YANG Li chen Key Laboratory of Trace Element Nutrition of National Health Committee National Institute for Nutrition and HealthChinese Center for Disease Control and PreventionBeijing 100050China Hunan Key Laboratory of Typical Environmental Pollution and Health Hazards School of Public HealthHengyang Medical SchoolUniversity of South ChinaHengyang 241001HunanChina Zhejiang Provincial Center for Disease Prevention and Control Hangzhou 310051ZhejiangChina Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention Nanning 530028GuangxiChina Hebei Provincial Center for Disease Control and Prevention Shijiazhuang 050021HebeiChina

Objective Studies on the relationship between iodine,vitamin A(VA),and vitamin D(VD)and thyroid function are *** study aimed to analyze iodine and thyroid-stimulating hormone(TSH)status and their possible relationships with VA,VD,and other factors in postpartum *** A total of 1,311 mothers(896 lactating and 415 non-lactating)from Hebei,Zhejiang,and Guangxi provinces were included in this *** urinary iodine concentration(UIC),TSH,VA,and VD were *** The median UIC of total and lactating participants were 142.00µg/L and 139.95µg/L,*** median TSH,VA,and VD levels in all the participants were 1.89 mIU/L,0.44μg/mL,and 24.04 ng/mL,*** differences in the UIC were found between lactating and non-lactating *** and TSH levels were significantly different among the three *** rural UIC was higher than the urban *** mothers had a higher UIC and a higher prevalence of excessive *** UICs and TSHs levels were observed in both the VD deficiency and insufficiency groups than in the VD-sufficient *** adjustment,no linear correlation was observed between UIC and VA/*** interaction was found between vitamins A/D and UIC on TSH *** The mothers in the present study had no iodine ***,area type,BMI,and VD may be related to the iodine status or TSH levels.

关键词： Median urinary iodine concentration Thyroid-stimulating hormone Vitamin A Vitamin D Postpartum women

胰岛素抵抗与高血压病大动脉顺应性及左室肥厚的关系

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实用医学杂志 2010年第20期26卷 3716-3718页

作者：关健陈秋兰广东医学院附属医院广东省湛江市524001 广东省惠州中心人民医院 516000

目的:探讨胰岛素抵抗与高血压病(EH)患者大动脉顺应性及左室肥厚的关系。方法:选取EH患者35例作为EH组,并选取性别、年龄、体重、类似于EH组的正常血压健康者35例作为正常对照组。均采用彩色多普勒超声心动图检测并计算升主动脉扩张度D... 详细信息

目的:探讨胰岛素抵抗与高血压病(EH)患者大动脉顺应性及左室肥厚的关系。方法:选取EH患者35例作为EH组,并选取性别、年龄、体重、类似于EH组的正常血压健康者35例作为正常对照组。均采用彩色多普勒超声心动图检测并计算升主动脉扩张度D和动脉僵硬度β值作为反映大动脉顺应性的参数,计算左室质量指数(LVMI)和相对室壁厚度(RWT)作为左室肥厚的参数。测定空腹血糖及空腹胰岛素,计算胰岛素抵抗指数(HOMA-IR)及胰岛素分泌指数(HOMA-β),两组作比较研究。结果:EH组HOMA-IR及HOMA-β均明显高于正常对照组,EH组升主动脉D值小于正常对照组,EH组升主动脉β、LVMI及RWT均明显大于正常对照组,两组比较差异有显著性(P<0.05)。EH组患者HOMA-IR、HOMA-β与升主动脉D值呈显著负相关(P<0.05),HOMA-IR、HOMA-β与升主动脉β值及LVMI、RWT分别呈显著正相关(P<0.05)。结论:EH患者胰岛素抵抗与大动脉顺应性及左室肥厚有明显相关性,与胰岛素抵抗相关的高胰岛素血症可能是促进EH患者发生心血管重塑的重要影响因素。

关键词：高血压病大动脉顺应性左室肥厚胰岛素抵抗

Developing and validating a predictive model of delivering large-forgestational-age infants among women with gestational diabetes mellitus

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World Journal of Diabetes 2024年第6期15卷 1242-1253页

作者： Yi-Tian Zhu lan-lan Xiang Ya-Jun chen Tian-Ying Zhong Jun-Jun Wang Yu Zeng Department of Clinical Laboratory Jinling Clinical Medical College of Nanjing Medical UniversityNanjing 210002Jiangsu ProvinceChina Department of Clinical Laboratory Women’s Hospital of Nanjing Medical UniversityNanjing Women and Children’s Healthcare HospitalNanjing 210003Jiangsu ProvinceChina

BACKGROUND The birth of large-for-gestational-age(LGA)infants is associated with many shortterm adverse pregnancy *** has been observed that the proportion of LGA infants born to pregnant women with gestational diabetes mellitus(GDM)is significantly higher than that born to healthy pregnant ***,traditional methods for the diagnosis of LGA have ***,this study aims to establish a predictive model that can effectively identify women with GDM who are at risk of delivering LGA *** To develop and validate a nomogram prediction model of delivering LGA infants among pregnant women with GDM,and provide strategies for the effective prevention and timely intervention of *** The multivariable prediction model was developed by carrying out the following ***,the variables that were associated with LGA risk in pregnant women with GDM were screened by univariate analyses,for which the P value waslanine transaminase-aspartate aminotransferase ratio and weight at 24 gestational *** nomogram’s prediction ability was supported by the area under the curve(0.703,0.709,and 0.699 f

关键词： Large-for-gestational-age Gestational diabetes mellitus Predictive model Nomogram Triglyceride-glucose index