查询词典 photon

Reflected light was detected by a device so sensitive that it could pick up one returning photon (the quantum-mechanical particles of which light is composed) out of every thousand billion fired by the laser.

接受反射光的设备具有如此的高敏感性，以至于（量子力学上的光的组成微粒之一）。

Objective to appraise the diagnostic value of Exercise stress test and exercise single-photon emission computed tomography to coronary artery disease.

目的评价运动负荷心电图试验、运动负荷心肌灌注核素显像对冠状动脉病变的诊断价值。

We also simulate the environment of photon experiment, and calculate the effect by use of fourfold symmetry torsion pendulum, we find that the double frequency effect caused by gravitational gradient is reduced a magnitude when we buildup the symmetry of measurement system.

我们还对二重对称扭秤的光子实验数据进行了分析，结果发现二倍频的效应为10~(-12)Nm 的量级，通过计算分析我们发现扭秤周围环境的不对称所引入的引力梯度效应是不容忽视的，因此针对喻家山人防山洞的具体情况，我们对光子实验的实际环境进行了模拟计算，理论分析结果表明对于二重对称的扭秤而言，环境不对称的影响引起的力矩效应为5.4940×10~(-10) Nm，对于四重对称的扭秤来说，效应为1.8668×10~(-11)Nm，可以看到随着扭秤对称性的增加，引力梯度的效应减小了一个数量级。

Experimental results disclosed that the upper limit on the photon mass was 1.2×10-51g, and this figure, collected by Particle Data Group in 2004, has improved almost 20-fold compared with that of the static torsion balance experiment.

该数值不仅将国际上扭秤静态实验结果提高了约20倍，而且调制的实验方法还有效地克服了扭秤静态实验中实验结果对宇宙磁场矢势与地球自转轴之间夹角的依赖关系，并且极大地抑制了各种周日背景干扰的影响，提高实验的置信水平，该实验结果于2004年被国际粒子物理数据组收录。

Objective: To observe the change of regional cerebral blood flow in different region of interest under quiet condition and performing hand motor condition with single photon emission tomography, elucidate the mechanism of the brain regions activated by simple hand motor (repetitive and sequential finger- to- thumb opposition movements in turn) and detect the role of active cortical areas by analyzing the difference of rCBF in different age groups.

目的：本研究的目的是运用单光子发射断层扫描仪对比观察正常人在安静状态下和执行手指简单运动状态下脑内不同感兴趣区（region of interest， ROI）的血流量变化情况，进而阐明简单运动模式下脑内运动相关功能区的激发情况，并通过分析不同年龄组运动区激发时血流量变化的差异来探讨运动功能区的作用，对于临床中枢神经系统瘫痪后的运动功能重建和康复训练具有指导意义。

So many global shifts are underway at this time in preparation for the next entry into the fifth star gate towards the photon belt of the Great Central Sun.

在这个时刻很多全球变迁正在进行，为进入领向大中枢太阳光子带的第五个恒星门而准备。

At 3000 strands, one will capture much more dream and have much more possibility therefore opened unto oneself in terms of what one may wish to experience for the remainder of this life. 3000 strands also rolls back the clock and de-ages the form enough that one may live well into the entry of the final star gate or photon belt and beyond.

在3000股 DNA ，你将捕获更多梦想，并因此能打开你所希望在剩余生命中所体验的更多可能。3000股也能拨转时钟，将形体足够返老还童，让你能很好生活到最后一个恒星门的进入或光子带及更远。

The unbiased estimation expression of photon limited short exposure image cross spectrum was deduced from another point of view.

从另一个角度推导了有限光子数情况下的交叉谱无偏估计表达式，研究了有偏项对振幅谱和相位谱的影响。

The geometries, electronic structures, one- and two-photon absorption spectra for a series of dendritic molecules have been studied.

与偶极矩化合物相比，八极矩分子具有更高的透明性和更大的双光子吸收截面，是更有前途的双光子吸收材料。

I used the homemade ECDL to measure the 2S-3D two photon transition spectrum of Helium , the advantages are that the expense of homemade ECDL is cheap and have good output power. At the same time, I used the electronic part can be got in the market to manufacture a pulse generator in the experiment, the pulse generator can control the output frequency, the pulse width, the relative phase and also can simultaneously control four sets of systems or instruments need the TTL pulse control. The advantage is that the cost of the pulse generator is cheap and the pulse generator is stable. To isolate the magnetic field I used the magnetic foil to helium cell. I also built a gas discharge system, the switch sequence of this system can be controlled by the pulse generator. Finally I built a detecting system can measure the helium energy state. It is cheap and can be combined with the comb laser system in my laboratory.

本实验是利用一台自制的外腔雷射系统来量测2S-3D的氦原子双光子跃迁，其优点在於自制的外腔雷射之费用非常便宜，也有不错的输出功率，同时在实验中我利用市售的电子零件制作了一台脉冲产生器，可控制输出的频率、脉冲宽度以及相对的相位，且可同时控制四套需要TTL脉冲控制的系统或仪器，优点除了便宜之外，也非常稳定；为了隔绝磁场，利用了磁场隔绝金属箔，我也在实验室中建立了一组气体放电系统，其系统可以用脉冲产生器来控制开关时序，最后，我建造了一个氦原子能阶的量测系统，而且费用低廉，可与本实验室的另外一门研究光梳雷射系统做结合。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新