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The W-11-4A Platform Comprehensive Strength Monitoring System

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China Ocean Engineering 1998年第2期13卷 135-146页

作者： Shen, zh Li, H Xue, YI Chen, JC zhao, Q Chinese Acad Sci Inst Mech Beijing 100080 Peoples R China Louisiana Tech Univ Appl & Computat Anal & Modeling Program Ruston LA 71272 USA Acad Sinica S China Sea Inst Oceanol Guangzhou 510301 Peoples R China

A comprehensive strength monitoring system used on a fixed jacket platform is presented in this paper. The long-term monitoring of W-11-4A platform achieved. Structural responses (strain and acceleration) at selected locations, as well as associated environmental parameters, have been obtained. The emphasis of the paper is placed on the system design, and the instrumentation and operation methodology employed in the monitoring of the structural responses. The performance of the system and the characteristic results obtained during its 13-month operation are also summarized.

关键词： monitoring techniques comprehensive strength monitoring structural responses waterproof strain transducers underwater instrumentation techniques

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高速公路护栏方管立柱辊弯成型工艺仿真分析

公路 2024年第9期69卷 60-65页

作者：王文斌陈旺龙田宇乔东兴甘肃路桥建设集团有限公司兰州市730030 甘肃路桥新锐交通科技有限责任公司兰州市730100 兰州理工大学机电工程学院兰州市730050

为了解决三波形梁钢护栏方管立柱的弯角外圆弧半径不符合相关标准要求的问题,通过优化轧辊孔型设计,建立了方管立柱辊弯成型加工全流程仿真模型。基于显式动力算法,利用有限元分析软件研究了带钢通过轧辊时的应力分布与变形,提出了适用... 详细信息

为了解决三波形梁钢护栏方管立柱的弯角外圆弧半径不符合相关标准要求的问题,通过优化轧辊孔型设计,建立了方管立柱辊弯成型加工全流程仿真模型。基于显式动力算法,利用有限元分析软件研究了带钢通过轧辊时的应力分布与变形,提出了适用于立柱辊弯成型分析的数值模拟方法,对方管立柱成型和整形过程进行仿真分析,进而优化轧辊孔型,并调整管坯宽度。生产实践表明,改良后的方管立柱成型和整形机组能够满足生产加工需求,产品质量符合我国标准和设计要求。

关键词：高速公路护栏立柱轧制工艺辊弯成型有限元分析

小冲杆技术及其在材料与铅铋脆化效应研究中的应用

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中国腐蚀与防护学报 2024年第3期44卷 567-575页

作者：和雅洁陈灵芝阮章顺付晓刚纪琤龙斌中国原子能科学研究院、反应堆工程技术研究所北京102413

第四代反应堆中铅冷快堆是一种非常有发展前景的堆型。在铅冷快堆包壳材料设计时,需要重点考虑包壳材料与高温铅铋的相容性,关注其抗液态金属腐蚀能力,尤其是腐蚀介质与应力耦合时材料性能的变化。小冲杆实验(SPT)是一种使用小尺寸样品... 详细信息

第四代反应堆中铅冷快堆是一种非常有发展前景的堆型。在铅冷快堆包壳材料设计时,需要重点考虑包壳材料与高温铅铋的相容性,关注其抗液态金属腐蚀能力,尤其是腐蚀介质与应力耦合时材料性能的变化。小冲杆实验(SPT)是一种使用小尺寸样品评估材料服役条件下力学性能变化的实验方法,这种方法可以直接在正在使用的材料中提取样品而不损害其完整性,因此小冲杆测试非常适用于所研究材料数量有限或研究在役材料的情况。本文简要介绍了小冲杆测试技术,归纳了小冲杆测试与标准尺寸测试实验的相关性,阐述了使用小冲杆技术进行的关键材料力学性能研究,特别阐述了小冲杆测试在研究结构材料液态金属脆化效应(LME)方面的应用。结果可为小冲杆技术应用于研究材料液态铅铋脆化效应提供技术方法及理论支持。

关键词：小冲杆测试结构材料力学性能液态金属脆化效应

Corneal ulcer caused by nocardia brasiliensis in a patient with diabetes

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International Journal of Ophthalmology(English edition) 2014年第2期7卷 381-383页

作者： Xian-Ning Liu Na An Jie Wu Kun Xu Xiu-Ping zh Sheng-Li Mi Department of Ophthalmology the First Hospital of Xi'an Shaanxi Provincial Key Laboratory of Ophthalmology Ophthalmological Institute of Shaanxi Province Biomanufacturing Engineering Laboratory Graduate School at Shenzhen Tsinghua University

Dear Sir,Iam ***-Li Mi,from the Biomanufacturing engineering laboratory,Graduate School at Shenzhen,Tsinghua University,Shenzhen,China.I write to present a case report of nocardia brasiliensis in a patient with *** is part of a group of aerobic actinomycetes,widely distributed in *** asteroids and nocardia brasiliensis are the most common human *** infected by nocardia asteroids through the respiratory tract mainly suffer from primary suppurative pulmonary *** of nocardia brasiliensis often occurs in the advanced stages of a progressive disease or immune disorder,especially Cushing syndrome,diabetes,or in patients using corticosteroids,immunosuppressive agents and broad-spectrum antibiotics for long time[1].To our knowledge,the reports of nocardia keratitis was very rare

关键词： Corneal ulcer caused by nocardia brasiliensis in a patient with diabetes

An automatic optimization method for minimizing supporting structures in additive manufacturing

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Advances in Manufacturing 2020年第1期8卷 49-58页

作者： Xiao-Jun Chen Jun-Lei Hu Qing-long zhou Constantinus Politis Yi Sun Institute of Biomedical Manufacturing and Life Quality Engineering State Key Laboratory of Mechanical System and VibrationSchool of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240P.R.China OMFS-IMPATH Research Group Department of Imaging and PathologyFaculty of MedicineKatholieke Universiteit LeuvenLeuvenBelgium Department of Oral and Maxillofacial Surgery University Hospitals LeuvenLeuvenBelgium

The amount of supporting structure usage has been a major research topic in layer-based additive manufacturing(AM)over the past years as it leads to increased fabrication time and decreased surface *** studies focused on deformation and topology optimization to eliminate the number of support ***,during the actual fabrication process,the properties of shape and topology are ***,they should not be modified *** this study,we present an optimizer that reduces the number of supporting structures by identifying the prime printing *** rotation,models are projected in each direction in space,and the basis units involved in the generation of support structures are ***,the area of the supporting structures is ***,the prime printing direction with minimal supporting area is obtained through pattern-searching *** results of the experiment demonstrated that the printing area was reduced by up to 60%for some cases,and the surface quality was also improved ***,both the material consumption and fabrication time were decreased in most *** future work,additional factors will be considered,such as the height of the supporting S Xiao-Jun Chen xiaojunchen@*** 1 Institute of Biomedical Manufacturing and Life Quality Engineering,State Key Laboratory of Mechanical System and Vibration,School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,*** 2 OMFS-IMPATH Research Group,Department of Imaging and Pathology,Faculty of Medicine,Katholieke Universiteit Leuven,Leuven,Belgium 3 Department of Oral and Maxillofacial Surgery,University Hospitals Leuven,Leuven,Belgium structures and the adhesion locations to improve the efficiency of this optimizer.

关键词： Printing direction Optimization Supporting structures

Surface pollen distribution patterns in Beibu Gulf and corresponding sediment dynamics environment

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Chinese Science Bulletin 2012年第8期57卷 902-911页

作者： TONG GuoBan CHEN Lian long JiangPing LI TuanJie XIAO XiaYun TONG SongMei lnxtituta of Hvdrooeologv and Environmental Geoloev.Chinese Academy of Geological Sciences Shijiazhuang 050061China South China Sea Marine Engineering Surveying Center State Oceanic AdministrationGuangzhou 510300China Second Institute of Oceanography State Oceanic AdministrationHangzhou 310012China State Key Laboratory of Lake Science and Environments Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China

The Beibu Gulf is a semi-enclosed gulf in the northwest of the South China *** palynologically analyzed 306 surface sediment samples from the eastern Beibu Gulf to improve bioclimatic interpretation of fossil pollen records *** pollen assemblages could be classified into five pollen regions based on the distributions of total,arboreal,herbaceous and fern pollen *** high-concentration and three low-concentration subregions could be distinguished within these *** distribution patterns of surface pollen assemblages were consistent with those of grain sizes of surface *** from regions with high pollen concentrations were very fine and fine silts (>7.0,0.088 mm).Sedimentary heterogeneity of surface pollen assemblages was closely related to pollen source,transportation and sedimentation controlled by ocean currents,tides and waves,and oceanic bottom *** spores exhibited higher percentages along the east margins of the region,while arboreal types like Pinus increased in concentration towards the *** pollen appeared in high percentages around seacoasts near their source *** and mangrove pollen were distributed near their source regions at low *** discuss the sediment dynamic environments in the eastern Beibu Gulf based on surface pollen *** estuary region is an important access to the sea basin and a depositional site for terrestrial pollen *** regions can accumulate pollen due to the back-and-forth movements of tides *** ocean currents on a gulf scale tend to spread pollen grains,the interaction of multiple currents could lead to pollen accumulation and *** surface pollen concentrations in the northeast shallow-water regions of the eastern Beibu Gulf could be attributed to repeated washing and sediment floatation caused by severe wave activities duri

关键词：花粉浓度分布格局北部湾动力学环境表面泥沙表层沉积物蕨类植物

神经外科手术部位感染危险因素及SAA与HBP诊断价值

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中华医院感染学杂志 2024年第7期34卷 1021-1025页

作者：徐伟丹潘昌玲徐丽英艾洁辛百龙杨莉丽水市中心医院手术室浙江丽水323000 丽水市中心医院院感科浙江丽水323000 丽水市中心医院神经外科浙江丽水323000

目的调查神经外科手术部位感染情况并分析血清淀粉样蛋白A(SAA)、肝素结合蛋白(HBP)对感染的预测价值。方法对2019年1月-2022年12月丽水市中心医院2930例神经外科手术患者进行回顾性调查,统计手术部位感染情况,分析不同感染类型的一般... 详细信息

目的调查神经外科手术部位感染情况并分析血清淀粉样蛋白A(SAA)、肝素结合蛋白(HBP)对感染的预测价值。方法对2019年1月-2022年12月丽水市中心医院2930例神经外科手术患者进行回顾性调查,统计手术部位感染情况,分析不同感染类型的一般临床资料以及感染患者的病原菌分布情况,采用Logistic回归分析手术部位感染的独立影响因素,通过绘制受试者工作特征(ROC)曲线分析术后血清SAA、HBP对手术部位感染的预测价值。结果2930例患者中,术后发生手术部位感染47例,发生率为1.60%,其中表浅切口感染9例,占比19.15%,器官腔隙感染38例,占比80.85%;47例切口感染患者中,33例检测到细菌,其中金黄色葡萄球菌是最常见的病原菌,占比36.54%;Logistic多因素回归分析显示,手术所在洁净手术室等级、使用植入物及血清SAA、HBP水平均为手术部位感染的相关影响因素(P<0.05);ROC曲线显示,血清SAA、HBP联合预测手术部位感染的敏感度、特异度、曲线下面积分别为83.91%、67.92%、0.860。结论神经外科手术部位感染发生率较高,金黄色葡萄球菌为主要病原菌,手术所在洁净手术室等级、使用植入物以及血清SAA、HBP水平是感染的独立相关因素,尤其是SAA和HBP,作为联合预测标志物,对手术部位感染的预测具有重要的临床价值。

关键词：神经外科手术手术部位感染病原菌危险因素淀粉样蛋白A 肝素结合蛋白

Textural differences based on apparent diffusion coefficient maps for discriminating pT3 subclasses of rectal adenocarcinoma

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World Journal of Clinical Cases 2021年第24期9卷 6987-6998页

作者： zhi-Hua Lu Kai-Jian Xia Heng Jiang Jian-long Jiang Mei Wu Department of Radiology Changshu Hospital Affiliated to Soochow UniversityChangshu No.1 People's HospitalChangshu 215500Jiangsu ProvinceChina Department of Information Changshu Hospital Affiliated to Soochow UniversityChangshu No.1 People's HospitalChangshu 215500Jiangsu ProvinceChina Department of Surgery Changshu Hospital Affiliated to Soochow UniversityChangshu No.1 People's HospitalChangshu 215500Jiangsu ProvinceChina Department of Pathology Changshu Hospital Affiliated to Soochow UniversityChangshu No.1 People's HospitalChangshu 215500Jiangsu ProvinceChina

BACKGROUND The accuracy of discriminating pT3a from pT3b-c rectal cancer using highresolution magnetic resonance imaging(MRI)remains unsatisfactory,although texture analysis(TA)could improve such *** To investigate the value of TA on apparent diffusion coefficient(ADC)maps in differentiating pT3a rectal adenocarcinomas from pT3b-c *** This was a case-control study of 59 patients with pT3 rectal adenocarcinoma,who underwent diffusion-weighted imaging(DWI)between October 2016 and December *** inclusion criteria were:(1)Proven pT3 rectal adenocarcinoma;(2)Primary MRI including high-resolution T2-weighted image(T2WI)and DWI;and(3)Availability of pathological reports for surgical *** exclusion criteria were:(1)Poor image quality;(2)Preoperative chemoradiation therapy;and(3)A different pathological ***-order(ADC values,skewness,kurtosis,and uniformity)and second-order(energy,entropy,inertia,and correlation)texture features were derived from whole-lesion ADC *** operating characteristic curves were used to determine the diagnostic value for pT3b-c *** The final study population consisted of 59 patients(34 men and 25 women),with a median age of 66 years(range,41-85 years).Thirty patients had pT3a,24 had pT3b,and five had *** the ADC first-order textural differences between pT3a and pT3b-c rectal adenocarcinomas,only skewness was significantly lower in the pT3a tumors than in pT3b-c *** the ADC second-order textural differences,energy and entropy were significantly different between pT3a and pT3b-c rectal *** differentiating pT3a rectal adenocarcinomas from pT3b-c tumors,the areas under the curves(AUCs)of skewness,energy,and entropy were 0.686,0.657,and 0.747,*** regression analysis of all three features yielded a greater AUC(0.775)in differentiating pT3a rectal adenocarcinomas from pT3b-c tumors(69.0%sensitivity and 83.3%specificity).CONCLUSION TA features

关键词： Diffusion-weighted imaging Apparent diffusion coefficient Rectal cancer Cancer stage Texture analysis case-control study

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同心反切圆燃烧技术试验研究和数值模拟

燃烧科学与技术 2001年第2期7卷 135-140页

作者：朱珍锦刘松李永光章德龙唐必光上海电力学院动力系上海200090 武汉水利电力大学动力系武汉430072

根据纯几何相似模化理论对某 30 0 MW引进燃烧技术 ,锅炉按 1∶ 13.9比例缩小建立模型试验台。通过对不同二次风反切角度、反切层数及其组合反切方式下的炉膛、烟道中的气流、颗粒流动特性进行了试验研究和数值模拟 ,得到了不同二次风... 详细信息

根据纯几何相似模化理论对某 30 0 MW引进燃烧技术 ,锅炉按 1∶ 13.9比例缩小建立模型试验台。通过对不同二次风反切角度、反切层数及其组合反切方式下的炉膛、烟道中的气流、颗粒流动特性进行了试验研究和数值模拟 ,得到了不同二次风反切方式下炉内气流、颗粒运动规律。

关键词：反切角度反切层数同心反切圆燃烧技术试验锅炉