Results 31 to 40 of about 7,074 (108)

典型高温薄膜传感器的研究进展 [PDF]

open access: yes, 2018
随着航空发动机、燃气轮机、内燃机、石油化工设备等的设计、运行要求不断提高,对典型高温薄膜传感器如高温薄膜应变计、高温薄膜温度计、高温薄膜热流量计的需求越来越迫切。文中介绍了高温薄膜应变计、高温薄膜温度计、高温薄膜热流量计以及多功能集成高温薄膜传感器等典型高温薄膜传感器的研究现状,分析了它们在敏感材料、材料体系、制造工艺和信号传输方面存在的主要问题 ...
周排弟   +6 more
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Progress and trends in non-tool rock breaking theory and technology [PDF]

open access: yes
With the gradual implementation of China’s deep-earth engineering strategy, deep resource extraction and underground space construction have brought in some new opportunities, but they also face many challenges, with extreme geological conditions such as
Dayang YU   +6 more
core   +1 more source

Study on Si doped with supersaturated Ti induced by continuous wave Nd∶ YAG laser [PDF]

open access: yes, 2016
为了在硅中掺入过饱和的过渡金属杂质,采用自行设计的线形大功率Nd∶YAG激光辐照表面溅射钛的硅片,对辐照后样品进行了俄歇电子能谱测试,利用2维热力学模型,对连续激光扫描的过程进行了热力学模拟。结果表明,硅中的钛掺杂浓度远高于钛在硅中的固溶度,钛的最高浓度在表面下方一定距离处;硅片中的最高温度并不在硅的表面,温度分布导致了钛的分布不在表面;模拟结果与实验结果吻合得较好。线形连续激光能够通过对材料表面扫描辐照的方式进行加工,实现过饱和掺杂。In order to prepare Si with ...
庞爱锁, 范宝殿, 陈朝, 陈蓉
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涡轮叶片细微冷却通道周边区域应力分析 [PDF]

open access: yes, 2003
【中文文摘】提高军用燃气涡轮发动机的性能的关键是提高涡轮前燃气温度,涡轮前燃气温度受到材料和冷却技术的制约。探索新的高效冷却方法对于提高涡轮前燃气温度有重要的作用。本文分别采用圆环和球壳模型,对具有重要应用前景的涡轮叶片新型冷却方法的泡沫多孔结构及细微冷却通道周边区域的应力进行具体的分析,对该结构的强度可行性进行了初步的论证 ...
黄太平
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Stability of flat tube SOFC stack with CH4/CO2 direct internal reforming [PDF]

open access: yes
Solid oxide fuel cells (SOFCs) are highly efficient and eco-friendly energy conversion devices that can utilize hydrocarbon fuels such as natural gas and biogas.
Kedi LIN   +4 more
core   +1 more source

Thermal and mechanical properties of fracture-filled granite with different structural forms under high temperature and high pressure [PDF]

open access: yes
The reservoir of deep hot dry rock (HDR) geothermal energy is not intact rock mass, which includes a large number of fractures induced by geological tectonic movement. The tectonic fractures are subsequently filled by hydrothermal fluid.
Weitao YIN, Zijun FENG
core   +1 more source

Three-dimensional Thermal-hydraulic Design of Fuel Element for Small Modular Fluoride-salt-cooled High-temperature Advanced Reactor [PDF]

open access: yes
The small modular fluoride-salt-cooled high-temperature reactor (FHR) has the advantages such as high thermal efficiency, and modular transportation and installation, which integrates the technological merits of the fourth-generation nuclear energy ...
DING Tongwei1, ZHANG Dalin2, CHEN Shuo3
core   +1 more source

Progress in thermal-mechantical effects induced by laser [PDF]

open access: yes, 2016
对激光辐照诱导的热与力学问题研究进展进行了综述,包括材料在高温、高升温速率下的本构关系,典型薄板和柱壳等结构在激光辐照下的热力破坏效应,多层材料体系的激光破坏行为等几个方面,并着重介绍了包含相变与烧蚀过程的激光破坏分析模型与机制研究,激光辐照效应的流-热-固耦合数值模拟方法,以及短脉冲激光引起的冲击与破坏机理等方面的研究新进展.
宋宏伟, 黄晨光
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Investigation of copper precipitation and nickel precipitation in Czochralski silicon [PDF]

open access: yes, 2013
在晶体硅材料制备和硅基器件制造过程中,过渡族金属铜(Cu)和镍(Ni)非常有可能沾污硅片。研究表明,铜和镍在硅中具有很高的扩散系数,并且固溶度随着温度降低而急剧下降,因此在硅片热处理后的冷却过程中容易形成金属沉淀,对硅器件性能及可靠性带来非常不利的影响。因此,硅中过渡族金属的沉淀行为,尤其是铜、镍杂质的沉淀行为一直是硅材料研究领域受到关注的问题。研究铜、镍在晶体硅中的沉淀行为,不仅在理论上有着重要意义,而且对提高硅器件性能和成品率也有重要的作用。本论文通过择优腐蚀和光学显微镜观察,配合傅里叶红外光谱仪 ...
张光超
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Research on sensing properties and detection technology of FBG embedded in anisotropic material and complex structure [PDF]

open access: yes, 2011
结构健康监测对于提高工程结构的运营效率,保障人民生命财产安全具有极其重大的意义。光纤光栅以其独特优势成为最具发展前景的埋入式传感器。本文研究光纤光栅埋入各向异性材料与复合结构基体后,光纤光栅与基体的相互作用力;建立基体所受的载荷与埋入式光纤光栅光谱响应的关系;实现埋入式光纤光栅在复杂结构载荷下健康监测。主要研究工作有以下三个方面: 一、研究分析了各向异性材料受轴对称复杂应力载荷或均匀温度载荷时,材料内部的应力与应变分布情况,并对埋设其中的光纤光栅传感特性进行了细致的研究 ...
陈文
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