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Improved monochromatic pyrometry for synchronous measurement of full-field temperature and deformation

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Science China(Technological Sciences) 2021年第9期64卷 2033-2046页

作者： ZHANG jinsong YUE MengKun WANG JinYang TANG YunLong jiang jinsong GUI YeWei FENG Xue Key Laboratory of Applied Mechanics Department of Engineering MechanicsTsinghua UniversityBeijing 100084China Center for Advanced Mechanics and Materials Tsinghua UniversityBeijing 100084China School of Engineering and Technology China University of GeosciencesBeijing 100083China Chengdu Aircraft Design and Research Institute Chengdu 610041China China Aerodynamics Research and Development Center Mianyang 621000China

Measuring the temperature and deformation synchronously at elevated temperatures is technically challenging and has become a major concern in the evaluation of mechanical properties. In this study, a simple, easy-to-implement, yet effective monochromatic pyrometry is established for non-contact and full-field temperature measurements, which can significantly reduce the error caused by the camera’s channel crosstalk that commonly occurs in the existing improved two-color method. In addition, hightemperature digital image correlation, combined with band-pass filtering and monochromatic illumination, is applied for deformation measurement. Subsequently, an experimental system was set up to validate the accuracy of the proposed method,which consists of a CCD camera for image capturing, a blue bandpass filter for radiation suppression, blue light irradiation for light compensation, and an infrared pyrometer for temperature recording. The results of the thermal heating experiment on the C/SiC sample proved that the selection of camera channel R in monochromatic pyrometry can reduce the error by channel crosstalk,and the proposed method is applicable for synchronous measurement of temperature and deformation.

关键词： synchronous measurement monochromatic pyrometry high-temperature DIC

膝关节内侧半月板后角根部撕裂伴移位的相关危险因素分析

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中国中医骨伤科杂志 2024年第7期32卷 46-51,56页

作者：李精敏宁思敏姜劲松运城市中心医院山西运城044000

目的:探讨膝关节内侧半月板后角根部撕裂伴移位的危险因素。方法:收集2021年7月至2023年7月就诊的300例膝关节内侧半月板后角根部撕裂患者临床资料,根据移位程度分成观察组和对照组,对比分析两组患者的性别、年龄、体重指数、病程、损... 详细信息

目的:探讨膝关节内侧半月板后角根部撕裂伴移位的危险因素。方法:收集2021年7月至2023年7月就诊的300例膝关节内侧半月板后角根部撕裂患者临床资料,根据移位程度分成观察组和对照组,对比分析两组患者的性别、年龄、体重指数、病程、损伤部位、内侧胫骨平台后倾角、半月板绝对脱出值和相对脱出率、关节软骨损伤程度、关节积液及骨髓水肿等因素,然后进行多因素Logistic回归分析后角根部撕裂伴移位的相关危险因素。结果:单因素分析发现观察组绝对脱出值((4.37±0.87)mm)高于对照组((3.69±0.77)mn),差异有统计学意义(P0.05);多因素logistic回归分析发现绝对脱出值(OR=2.205,P=0.019)、相对脱出率(OR=0.914,P=0.024)、内侧胫骨平台后倾角(OR=1.911,P=0.019)是内侧半月板后角根部撕裂伴移位的危险因素,而年龄、体重指数、内侧胫骨平台软骨损伤等不是影响因素。结论:半月板绝对脱出值和相对脱出率与胫骨平台后倾角增大是膝关节内侧半月板后角根部撕裂伴移位的危险因素,胫骨平台后倾角测量在诊断中具有较高的检出率和敏感性,伴移位患者半月板脱出和关节软骨损伤程度更严重。

关键词：膝关节半月板撕裂移位磁共振成像危险因素

预防性抗凝对大隐静脉射频闭合术后症状性静脉血栓栓塞的影响

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浙江医学 2024年第12期46卷 1305-1308页

作者：翁超杨光唯虞聪蒋劲松浙江省人民医院(杭州医学院附属人民医院)血管外科杭州310014

目的探讨大隐静脉射频闭合术后使用预防性抗凝药物对症状性静脉血栓栓塞(VTE)的影响。方法回顾性选取2022年1至12月在浙江省人民医院血管外科行大隐静脉射频闭合术的1074例患者为研究对象,其中未接受口服预防性抗凝药物组(未接受抗凝治... 详细信息

目的探讨大隐静脉射频闭合术后使用预防性抗凝药物对症状性静脉血栓栓塞(VTE)的影响。方法回顾性选取2022年1至12月在浙江省人民医院血管外科行大隐静脉射频闭合术的1074例患者为研究对象,其中未接受口服预防性抗凝药物组(未接受抗凝治疗组)106例、接受利伐沙班10 mg抗凝治疗5 d组(预防性抗凝5 d组)762例、接受利伐沙班10 mg抗凝治疗10 d组(预防性抗凝10 d组)206例。比较3组患者术后1个月内VTE发生率和出血性事件发生率。结果未接受抗凝治疗组术后1个月内未发生VTE,预防性抗凝5 d组和预防性抗凝10 d组术后1个月内VTE发生率分别为0.52%(4/762)和0.49%(1/206),3组患者术后1个月内VTE发生率比较差异无统计学意义(P=0.593)。未接受抗凝治疗组和预防性抗凝5 d组术后1个月内未发生出血性事件;预防性抗凝10 d组术后出现血尿1例,发生率为0.49%(1/206),3组患者术后1个月内出血性事件发生率比较差异无统计学意义(P=0.191)。结论大隐静脉射频闭合术后预防性抗凝使用利伐沙班未能明显降低VTE发生率,但也不会增加出血风险。

关键词：大隐静脉曲张大隐静脉射频闭合术利伐沙班静脉血栓栓塞

Prognostic value of clinicopathological characteristics in patients with pancreatic cancer

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Chinese Journal of Cancer Research 2015年第5期27卷 509-515页

作者： Mei Geng Haoping Xu Ruobing Ren Qing Qu Chengfang Shangguan Junwei Wu jinsong jiang Hao Li Weiguo Cao Department of Oncology Ruijin HosptialShanghai Jiaotong University School of Medicine Department of Radiation Oncology Ruijin HosptialShanghai Jiaotong University School of Medicine

Background： The purpose of this study was to analyze the effects of all clinical characteristics on the overall survival time, in order to provide a basis for determining the prognostic factor of patients with pancreatic cancer. Methods： A total of 103 pancreatic cancer patients were admitted to the Department of Radiotherapy and Chemotherapy of the Ruijin Hospital, Shanghai Jiaotong University School of Medicine, between January 2002 and December 2012. There were 68 men and 35 women; the median age was 62 years. Diagnoses of pancreatic cancer in all patients were confirmed by histopathology, cytology, or clinical diagnosis. The Kaplan-Meier method was performed to calculate the overall survival rate. The log-rank method was used to examine the univariate analysis. The Cox regression model was performed for multivariate analysis. Results： The median survival time was 293 days, the 1-, 2-, and 3-year survival rates were 27.18%, 5.83%, and 1.94%, respectively. Cox regression analysis revealed that age （P=0.015）, Karnofsky performance status （PS）（P=0.002）, surgical types （P〈0.001）, and platelet counts （P〈0.001） were independent prognostic factors affecting the overall survival of patients with pancreatic cancer. Conclusions＂ Pancreatic cancer had a poor prognosis, the general physical condition, age, the availability of radical surgery, and platelet counts were factors influencing the overall survival of patients with pancreatic cancer.

关键词： Pancreatic neoplasm prognosis survival treatment

RTTN基因复合杂合变异导致原发性小头畸形家系分析并文献复习

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中国儿童保健杂志 2024年第2期32卷 212-217页

作者：赵晨玥蒋劲嵩张莉雪郭敏高景波孙夏瑜郭荣卢洪涌武坚锐薛慧琴山西医科大学儿科医学系山西太原030001 山西省儿童医院(山西省妇幼保健院)细胞遗传室山西太原030001

目的分析RTTN基因变异导致原发性小头畸形(MCPH)家系的基因变异特点和临床表型,并为其遗传咨询及产前诊断提供参考。方法收集并分析一家系3例患儿(包括2例胎儿和2岁的先证者,其中1例胎儿为临床诊断患儿)及其父母的临床资料,对其中2名... 详细信息

目的分析RTTN基因变异导致原发性小头畸形(MCPH)家系的基因变异特点和临床表型,并为其遗传咨询及产前诊断提供参考。方法收集并分析一家系3例患儿(包括2例胎儿和2岁的先证者,其中1例胎儿为临床诊断患儿)及其父母的临床资料,对其中2名患儿及其父母采用家系全外显子组测序(trio-WES)检测,Sanger测序验证位点,软件预测其复合杂合变异的危害性。查阅国内外文献数据库,收集已报道的RTTN基因突变病例并进行文献复习。结果该家系3例患者在胎儿期有透明隔异常,胼胝体发育不良等脑部畸形,先证者(G2)、胎儿(G3)表现有孕晚期宫内发育迟缓和原发性小头畸形,G2出生后全面发育落后。trio-WES检出G2和G3的RTTN基因存在父源性的c.2101(exon16)C>T(***701Ter, 1526)无义变异和母源性的c.2863(exon22)G>A(***955Lys)错义变异,形成复合杂合变异。根据美国医学遗传学与基因组学学会(ACMG)变异分类指南,两个变异分别为可能致病性的(LP)和不确定的(VUS)。其中,位点c.2863(exon22)G>A为新发现的错义变异,且经过软件预测该变异对基因产物有害。结论 RTTN基因c.2101C>T和c.2863G>A复合杂合变异为该家系患儿小头畸形的遗传学病因。本报道丰富了RTTN基因变异谱,为该家系的产前诊断及再次生育提供了指导,并为进一步了解该基因突变导致的疾病提供素材和参考。

关键词： RTTN基因原发性小头畸形全外显子测序遗传学分析

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虚拟现实技术辅助机器车视觉循迹建模

安庆师范大学学报（自然科学版） 2024年第3期30卷 71-77页

作者：王鹏林史东辉江金松宫小兰刘梦茹安徽建筑大学电子与信息工程学院安徽合肥230601

针对机器车真实行驶环境复杂、循迹模型训练成本较高的问题,本文提出了一种基于虚拟现实技术辅助机器车视觉循迹建模的方法。首先,通过虚拟现实技术来构建机器车虚拟行驶环境,并采集该环境中的图像数据以创建仿真数据集。然后,基于虚拟... 详细信息

针对机器车真实行驶环境复杂、循迹模型训练成本较高的问题,本文提出了一种基于虚拟现实技术辅助机器车视觉循迹建模的方法。首先,通过虚拟现实技术来构建机器车虚拟行驶环境,并采集该环境中的图像数据以创建仿真数据集。然后,基于虚拟小车在虚拟行驶环境中的运行表现和循迹模型的预测准确率等指标,优化循迹模型中的网络结构以提高模型性能。最后,实现循迹模型在虚拟环境中的实时可视化循迹效果。实验结果表明,相对于传统模型和模型训练方法,改进的模型在仿真环境数据上的循迹准确率提升了5.2%,在真实环境数据集上的循迹准确率提升了5.9%,并达到了81.2%。因此,虚拟现实技术有效辅助了机器车来建立更高性能的循迹模型。

关键词：虚拟现实视觉循迹机器车卷积神经网络

Probabilistic back-analysis of rainfall-induced landslides for slope reliability prediction with multi-source information

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第9期16卷 3575-3594页

作者： Shui-Hua jiang Hong-Hu Jie Jiawei Xie jinsong Huang Chuang-Bing Zhou School of Infrastructure Engineering Nanchang UniversityXuefu Road 999Nanchang330031China Discipline of Civil Surveying and Environmental EngineeringFaculty of Engineering and Built EnvironmentThe University of NewcastleCallaghanNSW2308Australia

Probabilistic back-analysis is an important means to infer the statistics of uncertain soil parameters,making the slope reliability assessment closer to the engineering ***,multi-source information(including test data,monitored data,field observation and slope survival records)is rarely used in current probabilistic *** the probabilistic back-analysis of spatially varying soil parameters and slope reliability prediction under rainfalls by integrating multi-source information is a challenging task since thousands of random variables and high-dimensional likelihood function are usually *** this paper,a framework by integrating a modified Bayesian Updating with Subset simulation(mBUS)method with adaptive Conditional Sampling(aCS)algorithm is established for the probabilistic back-analysis of spatially varying soil parameters and slope reliability *** this framework,the high-dimensional probabilistic back-analysis problem can be easily tackled,and the multi-source information(*** pressure heads and slope survival records)can be fully used in the back-analysis.A real Taoyuan landslide case in Taiwan,China is investigated to illustrate the effectiveness and performance of the established *** findings show that the posterior knowledge of soil parameters obtained from the established framework is in good agreement with the field ***,the updated knowledge of soil parameters can be utilized to reliably predict the occurrence probability of a landslide caused by the heavy rainfall event on September 12,2004 or forecast the potential landslides under future rainfalls in the Fuhsing District of Taoyuan City,Taiwan,China.

关键词： Rainfall-induced landslide Spatial variability Probabilistic back-analysis Slope reliability analysis Bayesian updating

Uncertainties of landslide susceptibility prediction: Influences of random errors in landslide conditioning factors and errors reduction by low pass filter method

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第1期16卷 213-230页

作者： Faming Huang Zuokui Teng Chi Yao Shui-Hua jiang Filippo Catani Wei Chen jinsong Huang School of Infrastructure Engineering Nanchang UniversityNanchang330031China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu610059China Department of Geosciences University of PadovaPadovaItaly College of Geology and Environment Xi’an University of Science and TechnologyXi’an710054China Discipline of Civil Surveying and Conditioning EngineeringPriority Research Centre for Geotechnical Science and EngineeringUniversity of NewcastleNewcastleNSWAustralia

In the existing landslide susceptibility prediction(LSP)models,the influences of random errors in landslide conditioning factors on LSP are not considered,instead the original conditioning factors are directly taken as the model inputs,which brings uncertainties to LSP *** study aims to reveal the influence rules of the different proportional random errors in conditioning factors on the LSP un-certainties,and further explore a method which can effectively reduce the random errors in conditioning *** original conditioning factors are firstly used to construct original factors-based LSP models,and then different random errors of 5%,10%,15% and 20%are added to these original factors for con-structing relevant errors-based LSP ***,low-pass filter-based LSP models are constructed by eliminating the random errors using low-pass filter ***,the Ruijin County of China with 370 landslides and 16 conditioning factors are used as study *** typical machine learning models,*** perceptron(MLP),support vector machine(SVM)and random forest(RF),are selected as LSP ***,the LSP uncertainties are discussed and results show that:(1)The low-pass filter can effectively reduce the random errors in conditioning factors to decrease the LSP uncertainties.(2)With the proportions of random errors increasing from 5%to 20%,the LSP uncertainty increases continuously.(3)The original factors-based models are feasible for LSP in the absence of more accurate conditioning factors.(4)The influence degrees of two uncertainty issues,machine learning models and different proportions of random errors,on the LSP modeling are large and basically the same.(5)The Shapley values effectively explain the internal mechanism of machine learning model predicting landslide *** conclusion,greater proportion of random errors in conditioning factors results in higher LSP uncertainty,and low-pass filter can effectively reduce these random e

关键词： Landslide susceptibility prediction Conditioning factor errors Low-pass filter method Machine learning models Interpretability analysis

Pancreatoduodenectomy with vascular recon-struction in treating carcinoma of the pancrea-tic head

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Hepatobiliary & Pancreatic Diseases International 2004年第4期3卷 612-615页

作者： Bin Li FuZhen Chen XiaoHu Ge MingZhi Cai jinsong jiang JianPing Li ShuHong Lu Department of Vascular Hepatic Biliary and Pancreatic Surgery of Xiamen No. 1 Hospital Affiliated to Fujian Medical University Xiamen 361003 China. lxy918027@***

BACKGROUND:The incidence of carcinoma of the pancreas is increasing in the world. Pancreatic carcinoma is characterized by early local extension to contiguous structures and metastases to regional lymph nodes and the liver. This study was conducted to increase the rate of pancreatoduodenectomy combined with vascular reconstruction.;METHODS:Pancreatoduodenectomy with vascular reconstruction was performed for 79 patients at a number of hospitals in Fujian Province, Zhejiang Province, Shanghai and Xinjiang Uyghur Autonomous Region from April 1994 to December 2003. One of these patients also underwent right hemicolectomy; but all received through superior mesenteric vein (SMV)-portal vein (PV) reconstruction. The reconstructions of the superior mesenteric artery (SMA) and hepatic artery (HA) were performed in 4 patients, and reconstructions of the SMA or HA were carried out in 7 and 4 patients respectively. Partial reconstruction of the inferior vena cava (ICV) was done in 2 patients when the tumor was adhering to the wall of the inferior caval vein.;RESULTS:Four patients died during the peri-operative period, with a mortality rate of 5%. No complications such as biliary or pancreatic fistulae or artificial blood vessel infection were noted. Histological examination showed one patient with neuroendocrine cancer and the other 78 patients with adenocarcinoma of the pancreatic head. Resected endothelia and vascular margins proved to be microscopically tumor-free. Follow-up for 3 months to 10 years for all except two patients showed 7 of the 9 patients who had undergone resection and reconstruction of the SMA and HA died 7 months or 4 years after operation and 37 survived for over 3 years and 12 for more than 5 years. The rest are still under follow-up.;CONCLUSIONS:Pancreatoduodenectomy with vascular reconstruction for carefully selected patients with carcinoma of the pancreatic head has proved to be a safe and reliable treatment, capable of raising the rates of tumor resec

关键词： pancreatic tumor pancreatoduodenectomy