搜索结果: 151-165 共查到“知识库 应用物理学”相关记录802条 . 查询时间(2.327 秒)
NEST: A Comprehensive Model for Scintillation Yield in Liquid Xenon
Ionization and excitation processes Noble-liquid detectors Scintillators, scintillation and light emission processes Simulation methods and programs
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2011/8/31
A comprehensive model for explaining scintillation yield in liquid xenon is introduced.We unify various definitions of work function which abound in the literature and incorporate all available data o...
A Bayesian Approach to Comparing Cosmic Ray Energy Spectra
Bayesian Approach Cosmic Ray Energy Spectra
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2011/9/13
A common problem in ultra-high energy cosmic ray physics is the comparison of energy spectra. The question is whether the spectra from two experiments or two
regions of the sky agree within their sta...
Infrared dynamic polarizability of HD+ rovibrational states
Infrared dynamic polarizability rovibrational
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2011/8/31
A calculation of dynamic polarizabilities of rovibrational states with vibrational quantum number v = 0 − 7 and rotational quantum number J = 0, 1 in the 1sヲg ground-state potential of HD+ is pr...
A high dynamic range data acquisition system for a solid-state electron Electric Dipole Moment experiment
electric dipole moment, data acquisition system, channel cross-talk, systematic effect
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2011/8/30
We have built a high precision (24-bit) data acquisition (DAQ) system with eight simultaneously sampling input channels for the measurement of the electric dipole moment (EDM) of the electron. The DAQ...
ZE3RA: The ZEPLIN-III Reduction and Analysis Package
ZEPLIN-III, liquid xenon detectors, dark matter, signal analyses,data reduction
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2011/9/9
ZE3RA is the software package responsible for processing the raw data from the ZEPLIN-III dark matter experiment and its reduction into a set of parameters
used in all subsequent analyses. The detect...
Ratio Estimation in SIMS Analysis
secondary ion mass spectrometry, ratio, isotope measurement, statistics,bias
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2011/9/9
The determination of an isotope ratio by secondary ion mass spectrometry (SIMS) traditionally involves averaging a number of ratios collected over the course of a measurement. We show that this method...
Nuclear recoil scintillation and ionisation yields in liquid xenon from ZEPLIN–III data
Neutron scattering simulatton Neutron data
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2011/8/29
Scintillation and ionisation yields for nuclear recoils in liquid xenon above 10 keVnr(nuclear recoil energy) are deduced from data acquired using broadband Am-Be neutron sources. The nuclear recoil d...
基于BP网络的智能压力传感器系统研究与设计
压力传感器 BP神经网络 μC/OS-Ⅱ STM32F101C8
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2014/4/28
将STM32F101C8微处理器与μC/OS-Ⅱ操作系统相结合，设计出了一种高精度智能传感器系统，给出了相应的硬件结构和软件设计。利用BP神经网络对压力和温度两个目标参量进行数据融合处理，减小了两者相互交叉干扰敏感度。实测结果显示该传感器能满足多任务下的实时性要求，并具有更加精确、稳定、可靠的性能。
Low-Temperature Light Detectors with Neganov-Luke Amplification
Low-Temperature Light Detectors Neganov-Luke Amplification
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2011/8/26
The simultaneous measurement of phonons and scintillation light induced by incident particles in a scintillating crystal such as CaWO4 is a powerful technique for the active rejection of background in...
圆柱壳体振动陀螺谐振子的品质因数研究
品质因数 圆柱壳体振动陀螺 谐振子 能量损耗
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2014/4/28
品质因数是衡量陀螺振动特性的重要指标，它决定了陀螺的检测灵敏度。本文首先从理论上分析了影响圆柱壳体振动陀螺谐振子品质因数的主要因素。然后针对各种因素进行一系列的实验研究，包括谐振子的材料、形状以及尺寸等因素对于陀螺谐振子品质因数的影响。研究结果表明，谐振子的品质因数在很大程度上决定于谐振子材料、谐振环的形状及外径尺寸。
耗散腔场中双光子Tavies-Cummings模型量子纠缠分析
双光子Tavies-Cummings模型 量子相干 共生纠缠度 自发辐射系数 腔场的损耗
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2012/11/23
用共生纠缠度度量的方法来研究两原子在耗散和非耗散腔场中的量子纠缠.研究结果表明：通过控制相互作用时间能够制备出最大纠缠态；且由于原子的双光子跃迁，导致双光子Tavies-Cummings模型是单光子Tavies-Cummings模型在制备最大纠缠态上所需要的时间的.且原子的自发辐射和腔场的损耗使得两原子的最大相干随时间呈周期性减小.
高量程加速度传感器在测试中的失效分析
高量程加速度传感器 hopkinson杆 侵彻 失效
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2014/4/28
通过在不同测试环境对高量程加速度传感器进行测试，并对传感器在测试中出现的失效进行分析，在实验室环境测试中出现的主要失效模式为键合引线的脱落和微梁的断裂，其原因是不同金属的引线键合强度较低；重复性的冲击加速了材料的疲劳。在实弹测试环境测试中出现的传感器失效原因主要是在侵彻测试中传感器芯片与侵彻信号中高频分量发生共振导致过载增大，传感器芯片上的微结构位移失控，造成传感器结构断裂。
模态分析是微陀螺结构设计的重要环节，本文针对一种采用L形截面悬臂梁支撑的微陀螺结构，提出了参数化的模态分析方法。建立了微陀螺的参数化模型，以VC作为封装ANSYS的APDL命令流的工具，开发了微陀螺参数化的模态分析模块。利用该模块研究了微陀螺模态频率随主要结构尺寸变化的规律，发现对模态频率影响较大的是硅结构的厚度和支撑梁的宽度，并通过优化结构尺寸使其模态频率完全匹配。
基于分形理论的高速压制粉末颗粒摩擦力分析
分形维数 高速压制 黏着摩擦系数 内摩擦
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2012/11/23
按Bowden和Tabor的原始处理，基于分形理论将总黏着摩擦系数表示为弹性及塑性区中的黏着摩擦系数的组合，建立了黏着摩擦系数的分形模型和粉末颗粒的内摩擦与分形维数的数学模型.通过函数曲线分析了粉末颗粒的分形维数对总的黏着摩擦系数、粉末颗粒的内摩擦力的影响.研究表明：对于一定的分形维数，总的黏着摩擦系数随归一接触面积的增大而急剧减小，粉末颗粒的内摩擦力随粉末颗粒的分形维数的增大和温度的升高而很快达...
ENTANGLEMENT DISTRIBUTION OVER THE SUBSYSTEMS AND ITS INVARIANCE
ENTANGLEMENT DISTRIBUTION OVER THE SUBSYSTEMS INVARIANCE
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2014/5/28
We study the entanglement dynamics of two qubits, each of which is embedded into its local amplitude-damping reservoir, and the entanglement distribution among all the bipartite subsystems including q...