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Load Testing in Bridge Maintenance

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Journal of Architectural Research and Development 2024年第3期8卷 63-68页

作者： Bo Liu Xu Meng Ji Li zhi tu China Merchants Chongqing Highway Engineering Testing Center CO. LTD.Chongqing 400060China Chongqing Construction Science Research Inspection and Testing Co. Ltd.Chongqing 400060China

Highway bridges are a crucial component in road transportation *** bridges must be maintained according to usage requirements *** results must be considered before devising a maintenance *** testing is a vital method of assessing the quality and performance of highway *** outcomes of these tests facilitate the formulation of maintenance *** article examines the definition of load testing,its significance,and the process of execution,with the goal of providing support for bridge inspection and maintenance.

关键词： Highway bridge Load test and inspection Bridge maintenance

Defect Inspection Technology for Steel Truss Suspension Bridges

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Journal of World Architecture 2024年第2期8卷 12-16页

Steel truss suspension bridges are prone to developing defects after prolonged *** defects may include corrosion of the main cable or the steel *** ensure the normal and safe functioning of the suspension bridge,it is necessary to inspect for defects promptly,understand the cause of the defect,and locate it through the use of inspection *** promptly addressing defects,the suspension bridge’s safety can be *** author has analyzed the common defects and causes of steel truss suspension bridges and proposed specific inspection *** research is intended to aid in the timely discovery of steel truss suspension bridge defects.

关键词： Steel truss suspension bridge Defect Inspection technology

Analysis of Bridge Inspection Technology for Highway Reconstruction and Expansion

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Journal of World Architecture 2024年第1期8卷 40-44页

作者： Xu Meng Bo Liu Ji Li zhi tu China Merchants Chongqing Highway Engineering Testing Center Co. Ltd.Chongqing 400060China Chonging Construction Science Research Inspection and Testing Co. Ltd.Chongqing 400060China

This article focuses on bridge testing technologies in highway construction and expansion *** provides an overview of the inspection process for bridges in highway reconstruction and expansion projects,the main inspections,and strategies for improving the quality of *** units should conduct bridge inspections using appearance inspections,special inspections,and bearing capacity assessments in highway reconstruction and expansion *** effectively improve testing quality,relevant units should also focus on establishing and improving testing standards,strengthening material testing,and improving the overall quality of the testing *** research aims to enhance the quality of highway reconstruction and expansion projects by supporting the sensible application of bridge inspection technology.

关键词： Expressway Reconstruction and expansion Bridge engineering Detection technology

Influence of temperature, stress, and grain size on behavior of nano-polycrystalline niobium

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Chinese Physics B 2024年第7期33卷 467-474页

作者：晏玉平张柳亭张丽攀芦刚涂志新 School of Acronautical Manufacturing Engineering Nanchang Hangkong UniversityNanchang 330063China

Atomic simulations are executed to investigate the creep responses of nano-polycrystalline(NC) niobium established by using the Voronoi algorithm. The effects of varying temperature, applied stress, and grain size(GS) on creep properties and mechanisms are investigated. Notably, the occurrence of tertiary creep is exclusively observed under conditions where the applied stress exceeds 4.5 GPa and the temperature is higher than 1100 K. This phenomenon can be attributed to the significant acceleration of grain boundary and lattice diffusion, driven by the elevated temperature and stress levels. It is found that the strain rate increases with both temperature and stress increasing. However, an interesting trend is observed in which the strain rate decreases as the grain size increases. The stress and temperature are crucial parameters governing the creep behavior. As these factors intensify, the creep mechanism undergoes a sequential transformation: initially from lattice diffusion under low stress and temperature conditions to a mixed mode combining grain boundaries(GBs) and lattice diffusion at moderate stress and mid temperature levels, and ultimately leading to the failure of power-law controlled creep behavior, inclusive of grain boundary recrystallization under high stress and temperature conditions. This comprehensive analysis provides in more detail an understanding of the intricate creep behavior of nano-polycrystalline niobium and its dependence on various physical parameters.

关键词： creep behavior molecular dynamics simulation activation energy stress exponent nano-polycrystalline niobium

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实验性脑出血模型制作的研究进展

医学综述 2024年第17期30卷 2103-2109页

作者：涂治陈志颖九江学院附属医院神经内科江西九江332001

实验性脑出血(ICH)模型的制作方法较多,不同的研究目的选择的动物也不一样,小鼠、大鼠、兔、猫、犬、猪等动物均可以用于制作不同目的的活体动物模型。早期判断ICH模型制作是否成功,主要从动物行为学和影像学两个方面进行评估。与活体... 详细信息

实验性脑出血(ICH)模型的制作方法较多,不同的研究目的选择的动物也不一样,小鼠、大鼠、兔、猫、犬、猪等动物均可以用于制作不同目的的活体动物模型。早期判断ICH模型制作是否成功,主要从动物行为学和影像学两个方面进行评估。与活体动物模型对应的为体外模型,体外模型包括细胞模型和3D打印模型,细胞模型主要用于致病因子发病机制及干预的研究,3D打印模型主要用于外科手术操作训练。另外,脑微出血模型也可以用于ICH研究。常见的ICH病理过程包括血肿压迫、血脑屏障破坏、凝血酶毒性、铁离子沉积等。随着技术的进步,应用基因敲除和基因编辑技术构建ICH模型可能会是未来研究的一个热点。

关键词：脑出血动物模型体外模型病理机制

Mean Oscillation and Hankel Opera tors on Fock-type Spaces

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Acta Mathematica Sinica,English Series 2021年第7期37卷 1089-1108页

作者： zhi Hao tu Xiao Feng WANG School of Mathematics and Information Science and Key Laboratory of Mathematics and Interdisciplinary Sciences of the Guangdong Higher Education Guangzhou UniversityGuangzhou 510006P.R.China

For 1≤p<∞we introduce a notion of"p-mean oscillation"on C^(n)in terms of the q metric induced by reproducing kernel of F_(ψ)^(2).It is shown that the densely-defined Hankel operators Hf,Hf:F_(ψ)^(p)→F_(ψ)^(p),are simultaneously bounded if and only if f is of bounded“p-mean oscillation”.Furthermore,it is also shown that the densely-defined Hankel operators Hf、Hf:F_(ψ)^(p)→F_(ψ)^(p),are simultaneously compact if and only if f is of vanishing“p-mean oscillation”.Here the weightψis a positive function of logarithmic grow th sat isfying certain suitable conditions.

关键词： Fock-type spaces Hankel opera tors mean oscillation boundedness compac tn ess

Maintenance,Repair,and Reinforcement Measures for Dilapidated Small and Medium-Sized Bridges

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Journal of Architectural Research and Development 2024年第1期8卷 62-67页

作者： Xu Meng Bo Liu Ji Li zhi tu China Merchants Chongqing Highway Engineering Testing Center Co. Ltd.Chongqing 400060China Chongoing Construction Science Research Inspection and Testing Co. Ltd.Chongqing 400060China

The paper initiates by exploring the importance of maintaining,repairing,and reinforcing ***,it delves into routine and preventative maintenance measures tailored for small to medium-sized ***,the paper examines repair and reinforcement techniques specifically designed for deteriorated small and medium-sized bridges,encompassing methods for fortifying both the bridge foundation and upper and lower ***,the paper proposes suggestions aimed at fostering discussions and exchanges on the development of maintenance and repair processes for deteriorated small and medium-sized bridges.

关键词： Dilapidated small and medium-sized bridges Maintenance Repair and reinforcement

不同剂量利妥昔单抗治疗特发性膜性肾病的有效性和安全性

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临床肾脏病杂志 2024年第2期24卷 89-95页

作者：涂志辉杨定平武汉大学人民医院肾内科武汉430060

目的对比两种不同剂量利妥昔单抗方案治疗特发性膜性肾病患者的临床疗效。方法选取2019年12月1日至2021年12月31日经武汉大学人民医院诊断为特发性膜性肾病的患者,共79例。利妥昔单抗两剂方案组(49例):1 g/次,第1、15天各用1次,如随访6... 详细信息

目的对比两种不同剂量利妥昔单抗方案治疗特发性膜性肾病患者的临床疗效。方法选取2019年12月1日至2021年12月31日经武汉大学人民医院诊断为特发性膜性肾病的患者,共79例。利妥昔单抗两剂方案组(49例):1 g/次,第1、15天各用1次,如随访6个月时仍有肾病范围的蛋白尿,重复该方案1次;利妥昔单抗四剂方案组(30例):375 mg/m^(2),每周1次,共4次;2组均联合小剂量糖皮质激素。对比两组患者在治疗前后不同时间的24 h尿蛋白定量、血清白蛋白、血肌酐、外周血CD19^(+)细胞计数、抗PLA2R抗体滴度、疾病缓解率、不良反应等方面的差异。结果2组患者治疗前在性别、年龄、体重指数、血压、24 h尿蛋白定量、血清白蛋白、血肌酐、估算肾小球滤过率、抗PLA2R抗体、外周血CD19^(+)细胞计数等方面,差异均无统计学意义(P>0.05)。12个月后,2组24 h尿蛋白定量较治疗前均有显著下降(P0.05)。在血肌酐方面,2组患者总体肾功能均能保持稳定,差异无统计学意义(P>0.05)。2组抗PLA2R-Ab水平治疗后较治疗前均能有效降低,且差异无统计学意义(P>0.05)。在疾病缓解方面,在12个月时总有效率达到75.95%,而两剂方案组的临床缓解率(85.71%)显然高于四剂方案组(60%),差异有统计学意义(P0.05)。结论较高剂量的利妥昔单抗方案的临床缓解率更高,同时不良反应发生率并没有增加,更适用于IMN的治疗,但药物可能引起严重低钾血症的不良反应仍然需要重视。

关键词：肾小球肾炎,膜性抗CD20单抗利妥昔单抗不良反应

A Novel Cholesterol Oxidase Biosensor Based on Pt-nanoparticle/Carbon Nanotube Modified Electrode

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Chinese Chemical Letters 2005年第8期16卷 1081-1084页

作者： Qiao Cui SHI tu zhi PENG Department of Chemistry Xixi Campus Zhejiang University Hangzhou 310028

A Pt-nanooarticle/carbon nanotube modified graphite electrode immobilized with cholesterol oxidase/sol＇-gel layer was developed for monitoring *** this electrode,cholesterol concentration（4.0×10^-6 tp 1.0×10^-4mol/L）could be determined accurately in the presence of ascorbic or uric acid,and the response time was rapid （〈 20 s）. This biosensor has high sensitivity and selectivity.

关键词： Pt- nanoparticle carbon nanotube cholesterol oxidase biosensor.