The speckle imaging quality of space extended objects is limited by photon density in short exposure images.
空间扩展目标斑点成像的质量受到短曝光像中光子密度的限制。
Analyzing the carrier density and photon density of VCL in active region, the physical mechanism of gain clamping was revealed.
分析有源区内载流子和VCL光子密度的变化，揭示了增益钳制的物理机理。
The frequency-domain NIRS instruments modulate the light with a RF sine wave, which generates diffuse photon density wave (DPDW) in turbid tissue like brain.
频域近红外光谱系统利用一个高频正弦信号对光源进行调制，从而在大脑这类强散射介质中形成一种漫射光子密度波。
The paper introduces the present knowledge of the theory and technology of diffusion photon density wave (DPDW) which have been focus of the recent research.
本文介绍了目前生物医学光子学领域内引人注目的新技术—扩散光子密度波技术的理论基础、 系统及国内外的最新进展。
Using rate equation theory, the equation group including the population inversion density of the gain medium, photon density and the absorber ground state population density is acquired.
利用速率方程理论，得到包含激光增益介质反转密度、光子密度和饱和吸收介质基态布居数密度的速率方程组。
According to the system density matrix, discussed the evolution of the system entropy with time and photon statistical properties of the system.
根据系统密度矩阵，讨论了系统熵随时间的演化和系统光子统计性质。
Second, application of two photon absorption to three dimension density optical data storage is described.
双光子吸收在聚焦光束扫描存储技术中的应用；
The advanced photon source, especially the synchrotron radiation photon exited from undulator is equipped with extremely high power density.
第三代同步辐射光源，尤其是由波荡器引出的同步辐射光，具有极高的功率密度。
The time evolution properties of purity and distance between density operators in two photon non resonant interaction system are studied.
研究了双光子非共振作用系统中纯度和密度算符间距的特性。
The total photosynthetic photon flux density above and below canopy has a significant diurnal and seasonal changes and the changes of the upper and lower canopy are consistent.
冠层上方和下方总的光合光量子通量密度具有明显的日变化和季节变化，并且冠层上下变化规律一致。
Objective Comparing value of single photon absorptionetry (SPA) of bone mineral density (BMD) with of laminated cortex index of radius and ulna in diagnosing osteoporosis.
目的比较桡尺骨皮质分层指数与SPA骨矿定量法诊断骨质疏松症的价值。
Objective Comparing value of single photon absorptionetry (SPA) of bone mineral density (BMD) with of laminated cortex index of radius and ulna in diagnosing osteoporosis.
目的比较桡尺骨皮质分层指数与SPA骨矿定量法诊断骨质疏松症的价值。
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