Results 41 to 50 of about 28,191 (167)

Application Research of Slag mixed Sand in the Concrete [PDF]

open access: yes, 2016
随着我国城镇化进程的加快,对混凝土的需求量逐渐增长,混凝土的用砂量也逐渐增大,随着对砂子的不断开采,我国天然河砂资源逐渐枯竭,导致很多地方出现了无砂可采、一砂难求的情况。随着天然砂资源的紧缺,寻找新型骨料替代天然砂做为混凝土细骨料已经成为亟需解决的问题。 炉渣混合砂系本课题组为福建省龙澄建设集团所研发的新型混凝土细骨料,是将经过特殊预处理的生活垃圾焚烧炉渣与天然河砂按照一定配比复配而成的新型混合砂。如若将炉渣混合砂应用于混凝土,既可以缓解因为天然砂短缺而造成的原材料紧缺问题 ...
傅荣兴
core  

Unveiling Temperature‐Dependent Corrosion Behaviors of FeNiCrMoCBY Amorphous Alloy Coatings In Spent‐Fuel Storage Environments

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT A comparative study was performed to elucidate the temperature‐dependent corrosion kinetics and the semiconductor/structural characteristics of the passive film formed on Fe40Ni7Cr17Mo12C13B9Y2 (at%) amorphous alloy coatings. The results indicate that increasing temperature accelerates the corrosion kinetics of the coating.
Yang Lv   +12 more
wiley   +1 more source

绝缘子放电声发射识别的试验研究

open access: yesGaoya dianqi, 2005
提出了声发射法检测绝缘子放电的方案,试验研究了该方案的可行性及不同放电形式的识别问题。具体内容包括试验装置、试验方法和试验结果,在大量试验的基础上,分别研究和总结了绝缘子内部放电、表面污秽放电和电晕放电时声发射波的特征,研究了声发射检测中的干扰和抗干扰措施。
王成江   +4 more
doaj  

The Performance-based Seismic Design Of Tall Frame-Tube Wall Structure Based On Yield Mechanism [PDF]

open access: yes, 2016
随着科技和经济的发展,对于高层建筑结构的抗震设计提出了更高的要求,从以往的单纯满足规范要求的指令式的设计方式,转变为满足不同抗震性能要求的设计方式,特别是抗震性能设计思想被引入规范之后,针对高层超限结构往往需要进行性能设计。但现在的性能设计主要还是停留在构件层次,即小震、中震、大震下对应结构构件应该达到怎样的性能目标,这往往使结构性能设计仅局限于构件层次。而从屈服机制角度来探讨结构的抗震性能,实际将构件层次与整体结构层次连系起来,使得结构整体性能目标的确定更加明确,而且更易于构件控制 ...
陈家伟
core  

Using miniaturized laboratory equipment and DNA barcoding to improve conservation genetics training and identify illegally traded species

open access: yesConservation Biology, Volume 40, Issue 2, April 2026.
Abstract Illegal wildlife trade (IWT) is one of the largest global illegal activities, and it negatively affects biodiversity and sustainable development worldwide. DNA barcoding coupled with high‐throughput sequencing (i.e., metabarcoding) is useful in identifying taxa affected by IWT and has been used routinely for decades.
Maria Joana Ferreira da Silva   +9 more
wiley   +1 more source

Analysis of Acoustic Emission and Microseismic Signal Characteristics and Useful Signal Extraction [PDF]

open access: yes, 2017
声发射技术与微震监测技术是两门先进的高科技技术,可应用与岩土工程、水电工业、建筑工程、交通运输、矿业开发等重要领域,是一种动态的立体范围的空间监测方法,可进行全天候监测。基于声发射技术的室内岩石破坏声发射试验是研究岩石破裂机制、内部损伤演化、破坏前兆特性等的重要途径,这对岩石本身性质的研究和对工程现场的应用都有实用价值和指导意义。而在矿产资源开采的工程中,矿山作业的安全开展关系着矿业的可持续发展、工作人员的生命安全以及对社会和谐的影响,微震监测技术在安全监测中扮演着重要角色,其在信号辨识处理 ...
高真平
core  

Machine Learning Model for an App‐Based Tool to Assist With the Diagnosis of Canine Atopic Dermatitis

open access: yesVeterinary Dermatology, Volume 37, Issue 2, Page 236-246, April 2026.
Canine atopic dermatitis (cAD) is a chronic condition requiring life‐long management. Accurate diagnosis can be challenging, with no reliable diagnostic test. This study aimed to generate a simple diagnostic model for cAD. This model is a relevant prototype for an app‐based tool to support general practitioners in the diagnosis of cAD alongside ...
Xavier Langon   +2 more
wiley   +1 more source

一种用于均匀电场下人工积污试验的装置

open access: yesDianci bileiqi, 2018
为了降低污闪事故的威胁、了解绝缘子积污机理,研究人员在绝缘子积污特性方面做了许多工作,但仍少有针对均匀电场下的绝缘子积污特性的深入研究。为了研究均匀电场下绝缘子的积污特性,研制了一种用于均匀电场下人工积污试验的装置,该装置由恒温恒湿箱、无风试验罐以及粉尘发生器组成,使用多个测量装置监控试验区内的环境参数,并设计了相应的试验方法,按负反馈逻辑控制试验区内的环境参数。通过仿真计算与实际测量的手段对装置和方法的有效性做了初步研究,研究结果表明,该装置不仅能提供不同电压种类、场强可控的均匀电场 ...
梅红伟   +4 more
doaj  

Acoustic Emission Warning Signals Change Law Research during Deformation and Failure of Gassy Coal Rock [PDF]

open access: yes, 2013
为提高矿井瓦斯突出灾害预测准确率,基于力学、声学理论,采用实验室试验方法,以标准煤试样为研究对象,对含瓦斯煤岩变形破裂过程声发射(AE)预警声信号变化规律进行研究。试验结果表明:围岩应力增大,煤岩破裂由低围岩应力的脆性破坏逐渐过渡到高围岩应力状态的塑性破坏,可根据声发射高幅信号提前预测煤岩破裂时刻。瓦斯的力学和非力学作用对煤岩体力学性质和变形特性的影响均随瓦斯压力的增加而变大。瓦斯压力越大,则煤岩破裂进程加快,积累的声发射能量迅速释放,高值振铃计数声发射信号覆盖时间区段变长 ...
吕祥锋   +5 more
core  

Randomised, Double‐Blinded, Placebo‐Controlled Challenge Test With Single Food Items in Dogs With Atopic Dermatitis and Adverse Food Reactions

open access: yesVeterinary Dermatology, Volume 37, Issue 2, Page 247-256, April 2026.
ABSTRACT Background Identification of offending foods in dogs with adverse food reactions is usually based on “deterioration” during open food challenges. Objectives To examine the placebo effect during double‐blinded, placebo‐controlled food challenges using a predefined set of criteria for relapse.
Evi I. Sofou   +4 more
wiley   +1 more source

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