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基于指纹识别的汽车门锁遥控器设计 总被引:2,自引:0,他引:2
指纹识别具有唯一性、可靠性,在安全领域得到了广泛的应用。本文介绍了在指纹识别模块的基础上开发汽车门锁指纹遥控器,为指纹识别技术在嵌入式系统上的应用提供了一套很好的软硬件设计方案。 相似文献
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为改善柴油机喷油器喷孔内的残留燃油和初始气泡对近口(喷油器燃油喷口)区初始射流形态的影响,基于湍流模拟(large eddy simulation,LES)和界面追踪(volume of fluids,VOF)方法进行燃油近口区初始射流雾化过程的数值模拟,重点研究初始气泡对近口区初始射流形态和破碎过程的影响。结果表明:喷孔内初始气泡的大小和位置对初期射流雾化形态有显著影响,针阀开启后新喷入的燃油撞击初始气泡溃灭产生强烈扰动是造成初始射流头部破碎的主要因素。结合湍动能和亚网格涡黏系数进一步分析初始气泡对近口区初始射流结构形态及破碎的影响规律。 相似文献
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This paper presents experimental results of the post-fire behavior of tubular T-joints. The research aims at the failure modes
and the residual strengths of the T-joints after fire. Three tests of full-scale tubular T-joints are conducted. The first
one is carried out to study the mechanical behavior of T-joints under ambient temperature. The other two tests are performed
to study the influence of pre-load, heating and cooling phase on residual load-bearing capacity of the tubular T-joints. The
test results show that the sustained axial load on the brace has remarkable influence on the residual deflection of the T-joints
which is cooled down to room temperature. The results of the experiments also indicate that the axial load level and heating
and cooling history have more significant effects on the compressive stiffness of the T-joints than the residual strength.
In the numerical study, the result of finite element model agrees well with the test result. The work in this paper provides
a basis for further parametric analysis and theoretical study on the structural evaluation after fire. 相似文献
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以山东交通学院长清校区图书馆及文体馆工程的施工为例,对地下耦合热泵空调系统的设计、施工等进行了研究,提出了适合于实际工程且操作性较强的地热换热器设计、施工方案。 相似文献