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隧道-土-桥桩相互作用体系振动台试验与数值模拟研究

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振动工程学报 2024年第1期37卷 168-181页

作者：路沙沙赵东旭白举科刘少栋尹航辽宁工程技术大学土木工程学院辽宁阜新123000 辽宁省矿山沉陷灾害防治重点实验室辽宁阜新123000

以大连实际工程为背景,通过振动台试验研究了双隧道-砂土-桥桩系统在地震作用下的动力相互作用(SSSI),得到结构、场地的动力响应规律,并与ABAQUS数值模拟结果进行对比。数值模型引入kelvin本构模型子程序,利用等效线性方法处理砂土在计... 详细信息

以大连实际工程为背景,通过振动台试验研究了双隧道-砂土-桥桩系统在地震作用下的动力相互作用(SSSI),得到结构、场地的动力响应规律,并与ABAQUS数值模拟结果进行对比。数值模型引入kelvin本构模型子程序,利用等效线性方法处理砂土在计算过程中的非线性问题。将试验结果与数值模拟结果进行对比,验证了数值模拟的可靠性。在此基础上设计了8种工况,通过对比分析研究了体系内各结构之间的相互作用规律。结果表明,隧道会放大桥桩、临近隧道的峰值加速度,而桥桩却会对侧穿隧道的峰值加速度起到减弱作用;隧道与桥桩的存在均会增大彼此的截面剪力与弯矩,其中受影响的区域主要集中在隧道上下拱,桥桩的桩底与桩-土交界面。

关键词：结构-土-结构相互作用振动台试验数值模拟动力响应放大系数

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Effect of Gd on microstructure and refinement performance of Al-5Ti-B alloy

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China Foundry 2021年第3期18卷 223-228页

作者： Dong-song Yin Ning Zhang ke-ju Chen Yun-long Zhang School of Materials Science and Engineering Heilongjiang University of Science and TechnologyHaerbin 150022China School of Materials Science and Engineering Jiamusi UniversityJiamusi 154007China

Al-5Ti-B and Al-5Ti-B-Gd master alloy refiners were fabricated by fluorine salt casting *** microstructure and phase constitution of the master alloys were investigated by scanning electron microscopy (SEM),transmission electron microscopy (TEM) and X-ray diffraction (XRD).The results show that Al-Ti-B alloy refiner consists of Al_(3)Ti phase and TiB2 *** Gd is introduced into the intermediate alloy,Ti_(2)Al_(20)Gd phase appears in the alloy,the size of Al_(3)Ti is significantly reduced,and Ti-Al-Gd phase is found in the edge of Al_(3)Ti *** the same time,some independent Ti-Al-Gd phases appear in local areas,which are Ti_(2)Al_(20)Gd phase determined by micro-area electron diffraction *** and calculation results of the high-resolution images of the Ti_(2)Al_(20)Gd/Al structure show that there is no other compound at the junction between the Ti_(2)Al_(20)Gd phase and Al,and Ti_(2)Al_(20)Gd phase has a great difference in atomic space with the α-Al,which cannot be directly used as heterogeneous ***,after being decomposed in the aluminum melt,the Ti_(2)Al_(20)Gd phase can promote the refinement effect of the *** the Al-Ti-B-Gd master alloy,there are many dispersed Al_(3)Ti particles with a size of less than 1 μm,which can promote the Al-5Ti-B refining effect.

关键词： Al-5Ti-B alloy refiner Al_(3)Ti rare earth Gd Ti_(2)Al_(20)Gd

不同血糖指标与癌症发病风险的前瞻性队列研究

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现代预防医学 2024年第6期51卷 988-993页

作者：柯居中吴抗刘晓琳邱桦王小楠李智韬周弋上海市浦东新区疾病预防控制中心慢性病防治科

目的探索空腹血糖(FPG)、餐后2小时血糖(2hPG)、糖化血红蛋白(HbA1c)和甘油三酯-葡萄糖乘积指数(TyG)等血糖指标与癌症发病风险的关联。方法以浦东新区慢病队列人群为研究对象，采用cox回归模型和限制性立方样条(RCS)回归模型探索血... 详细信息

目的探索空腹血糖(FPG)、餐后2小时血糖(2hPG)、糖化血红蛋白(HbA1c)和甘油三酯-葡萄糖乘积指数(TyG)等血糖指标与癌症发病风险的关联。方法以浦东新区慢病队列人群为研究对象，采用cox回归模型和限制性立方样条(RCS)回归模型探索血糖指标与癌症结局之间的关联。结果队列总计观察人年数为57 762人年，共随访到411人确诊癌症，发病密度7.12/千人年。校正其它危险因素后，FPG和2hPG水平每增加1SD,癌症发病风险的HR(95%CI)分别增加1.10 (1.03～1.18)和1.11 (1.02～1.20)。FPG水平与癌症发病风险之间的关联呈现线性的剂量-反应关系，2hPG水平与癌症发病风险之间的关联有呈现U型剂量-反应关系的趋势。结论 FPG、2hPG水平升高是癌症发病的重要危险因素，在癌症的防治工作中应重视血糖的控制。

关键词：空腹血糖餐后2小时血糖糖化血红蛋白甘油三酯-葡萄糖乘积指数癌症

SiO_(2)@CTS-g-(AA-co-AM)吸水树脂的吸液性能研究

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化学研究与应用 2024年第5期36卷 1084-1091页

作者：张克举夏卿谢雷吴凡申盛伟邓芳徐玉萍刘勇武汉工商学院环境与生物工程学院湖北武汉430065

正硅酸乙酯(TEOS)经碱性催化水解缩合、去模板等工艺合成介孔二氧化硅(SiO_(2)),羧甲基壳聚糖(CTS)作为合成复合吸水树脂的基材,与丙烯酰胺(AM)和丙烯酸(AA)的共聚物接枝共聚,制备了SiO_(2)@CTS-g-(AA-co-AM)复合吸水树脂。傅立叶红外... 详细信息

正硅酸乙酯(TEOS)经碱性催化水解缩合、去模板等工艺合成介孔二氧化硅(SiO_(2)),羧甲基壳聚糖(CTS)作为合成复合吸水树脂的基材,与丙烯酰胺(AM)和丙烯酸(AA)的共聚物接枝共聚,制备了SiO_(2)@CTS-g-(AA-co-AM)复合吸水树脂。傅立叶红外光谱仪、透射电子显微镜和热重分析仪对复合树脂进行了表征,并在不同环境下探讨了吸水树脂的吸液性能及对重金属离子的吸附性能。结果表明,亲水性的SiO_(2)加入,能有效改善吸水树脂耐温保水性能,树脂在80℃条件下干燥6h,其保水率最高可达91.8%。SiO_(2)使得复合树脂形成稳定的三维网络结构,具有较强的耐盐性能,表现出更佳的吸附性能。

关键词：高倍率吸水树脂杂化吸液性能重金属离子

High-sensitivity temperature sensor based on long-period fiber grating

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Optoelectronics Letters 2008年第2期4卷 114-116页

作者： RUAN ju-an ZENG Qing-ke QIN Zi-xiong LIANG Wei-yuan HUANG Ping Department of Physics and Electronic Engineering Guangxi Normal University Guilin 541004 China

Temperature sensitivity is greatly improved by taking the following three measures： proper long-period fiber grating （LPFG） whose strain coefficient of the core is larger than that of the cladding is employed, the LPFG is coated with a thin film of the material whose refractive index decreases with the temperature, and the sensor is encapsulated by metal material whose thermal expansion coefficient is large. By computer simulation, a measured temperature coefficient of 0.2375 nm/℃ and a temperature resolution less than 0.1 ℃ are obtained.

关键词：高灵敏度温度敏感器纤维光栅光学元件性能

Optimization of the OCO-2 Cloud Screening Algorithm and Evaluation against MODIS and TCCON Measurements over Land Surfaces in Europe and Japan

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Advances in Atmospheric Sciences 2020年第4期37卷 387-398页

作者： Sijie CHEN Shuaibo WANG Lin SU Changzhe DONG ju ke Zhuofan ZHENG Chonghui CHENG Bowen TONG Dong LIU State key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhouZhejiang 310027China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China Shanghai Institute of Satellite Engineering Shanghai201109China

A method to tighten the cloud screening thresholds based on local conditions is used to provide more stringent schemes for Orbiting Carbon Observatory-2(OCO-2)cloud screening *** screening strategies are essential to remove scenes with significant cloud and/or aerosol contamination from OCO-2 observations,which helps to save on the data processing cost and ensure high quality retrievals of the column-averaged CO2 dry air mole fraction(XCO2).Based on the radiance measurements in the 0.76μm O2A band,1.61μm(weak),and 2.06μm(strong)CO2 bands,the current combination of the A-Band Preprocessor(ABP)algorithm and Iterative Maximum A Posteriori(IMAP)Differential Optical Absorption Spectroscopy(DOAS)Preprocessor(IDP)algorithm passes around 20%-25%of all soundings,which means that some contaminated scenes also pass the screening *** this work,three independent pairs of threshold parameters used in the ABP and IDP algorithms are sufficiently tuned until the overall pass rate is close to the monthly clear-sky fraction from the MODIS cloud *** tightened thresholds are applied to observations over land surfaces in Europe and Japan in *** results show improvement of agreement and positive predictive value compared to the collocated MODIS cloud mask,especially in summer and *** addition,analysis indicates that XCO2 retrievals with more stringent thresholds are in closer agreement with measurements from collocated Total Carbon Column Observing Network(TCCON)sites.

关键词： cloud screening CO2 retrieval OCO-2 MODIS TCCON

基于提升小波熵指标的梁板组合桥损伤识别研究

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振动与冲击 2012年第11期31卷 114-117页

作者：孙增寿范科举郑州大学土木工程学院郑州450002 中铁大桥局集团第一工程有限公司郑州450053

利用提升小波和熵的特点,提出了基于提升小波熵的结构损伤识别方法,给出了提升小波时间熵和相对提升小波熵两个结构损伤指标。通过梁板组合桥的数值模拟表明,提升小波时间熵指标能较好地识别结构的损伤时刻,而相对提升小波熵指标能较好... 详细信息

利用提升小波和熵的特点,提出了基于提升小波熵的结构损伤识别方法,给出了提升小波时间熵和相对提升小波熵两个结构损伤指标。通过梁板组合桥的数值模拟表明,提升小波时间熵指标能较好地识别结构的损伤时刻,而相对提升小波熵指标能较好地识别结构的损伤位置。

关键词：提升小波提升小波熵结构损伤识别

TransCell:In Silico Characterization of Genomic Landscape and Cellular Responses by Deep Transfer Learning

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Genomics, Proteomics & Bioinformatics 2024年第2期22卷 157-170页

作者： Shan-ju Yeh Shreya Paithankar Ruoqiao Chen Jing Xing Mengying Sun ke Liu Jiayu Zhou Bin Chen Department of Pediatrics and Human Development Michigan State UniversityGrand RapidsMI 49503USA Department of Pharmacology and Toxicology Michigan State UniversityGrand RapidsMI 49503USA Department of Computer Science and Engineering Michigan State UniversityEast LansingMI 48824USA

Gene expression profiling of new or modified cell lines becomes routine today;however,obtaining comprehensive molecular characterization and cellular responses for a variety of cell lines,including those derived from underrepresented groups,is not trivial when resources are *** gene expression to predict other measurements has been actively explored;however,systematic investigation of its predictive power in various measurements has not been well ***,we evaluated commonly used machine learning methods and presented TransCell,a two-step deep transfer learning framework that utilized the knowledge derived from pan-cancer tumor samples to predict molecular features and *** these models,TransCell had the best performance in predicting metabolite,gene effect score(or genetic dependency),and drug sensitivity,and had comparable performance in predicting mutation,copy number variation,and protein ***,TransCell improved the performance by over 50%in drug sensitivity prediction and achieved a correlation of 0.7 in gene effect score ***,predicted drug sensitivities revealed potential repurposing candidates for new 100 pediatric cancer cell lines,and predicted gene effect scores reflected BRAF resistance in melanoma cell ***,we investigated the predictive power of gene expression in six molecular measurement types and developed a web portal(http://***/transcell/)that enables the prediction of 352,000 genomic and cellular response features solely from gene expression profiles.

关键词： Genomics Transcriptomics Cancer dependency Drug repurposing Transfer learning

The association between internal migration and pulmonary tuberculosis in China,2005–2015:a spatial analysis

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Infectious Diseases of Poverty 2020年第1期9卷 101-101页

作者： Wei-Bin Liao ke ju Ya-Min Gao Jay Pan West China School of Public Health and West China Fourth Hospital Sichuan UniversityNo.17Section 3Ren Min Nan RoadChengdu 610041SichuanChina 不详 West China Research Center for Rural Health Development Sichuan UniversityChengduChina

Background:Internal migration places individuals at high risk of contracting tuberculosis(TB).However,there is a scarcity of national-level spatial analyses regarding the association between TB and internal migration in *** our research,we aimed to explore the spatial variation in cases of sputum smear-positive pulmonary TB(SS+PTB)in China;and the associations between SS+PTB,internal migration,socioeconomic factors,and demographic factors in the country between 2005 and ***:Reported cases of SS+PTB were obtained from the national PTB surveillance system database;cases were obtained at the provincial *** migration data were extracted from the national population sampling survey and the *** autocorrelations were explored using the global Moran’s statistic and local indicators of spatial *** spatial temporal analysis was performed using Kulldorff’s scan *** effects regression was used to explore the association between SS+PTB and internal ***:A total of 4708563 SS+PTB cases were reported in China between 2005 and 2015,of which 3376011(71.7%)were male and 1332552(28.3%)were *** was a trend towards decreasing rates of SS+PTB notifications between 2005 and *** result of global spatial autocorrelation indicated that there were significant spatial correlations between SS+PTB rate and internal migration each year(2005–2015).Spatial clustering of SS+PTB cases was mainly located in central and southern China and overlapped with the clusters of *** proportions of emigrants and immigrants were significantly associated with SS+*** capita GDP and education level were negatively associated with SS+*** internal migration flow maps indicated that migrants preferred neighboring provinces,with most migrating for work or ***:This study found a significant spatial autocorrelation between SS+PTB and internal *** emigration and immigration were statisticall

关键词： Internal migration Pulmonary tuberculosis Spatial analysis China