光子

The stunning result, though, was that in some places the number of photons was actually less than zero.

尽管，最让人吃惊的结论是在某些地方，光子的数量事实上少於零。

The factors affecting the number of photons and the spatial resolution are discussed.

模拟结果也说明了增加平均光子数对提高空间分辨率的重要性。

This project will promote the development of microwave photonics.

本项目的研究成果对于微波光子技术的发展具有重要意义。

Now he engages in the research in Photonics Technology Research Center, Hunan University.

现在湖南大学计算机与通信学院信息光子技术研究中心学习与研究。

Photonics Research Center,School of Science,Harbin Engineering University,Harbin 150001

哈尔滨工程大学理学院光子科学与技术研究中心，哈尔滨 150001

As a new-style artificial material, photonic crystals will facilitate the development and innovation of the photonics and information industry.

光子晶体作为一种新型人工电磁介质的出现，将为光子学及信息产业的发展开创新的领域。

The behavior of phonons in a fluid at rest or moving uniformly is like that of photons in flat spacetime, where gravity is absent.

声子在静止与均匀流动的流体中的行为，就和光子在没有重力的平坦空间中一样。

His current technical interests include energy distribution systems, and phonon imaging.

他现在的研究重点是能源分配系统与光子成像技术。

The is related to the frequency dependent absorption cross section and the density and spatial distribution of atoms in the lower level of the transition. Position dependent 5P3/2 state densities had been combined with the collisional broadening rate 5P3/2 5S1/2 line due to both helium and cesium perturbers to yield the .The effective radiative rates of the Rb D2 line as a function of the He pressure PHe were obtained . The fluorescence intensity I780 of the 5P3/2 5S1/2 emission was measured simultaneously.

由于辐射陷获存在，有效辐射率是自然辐射率与透射因子（发射的光子在探测区域内没有被吸收的平均概率，它与吸收截面及激发态原子密度和空间分布有关）的乘积。5P3/2原子密度及其空间分布结合5P3/2 5S1/2跃迁线的碰撞增宽计算了透射因子，从而得到了不同He气压下，Rb D2线的有效辐射率。

The point doses at the inferior beam edge for the two energies were 31.2% and 32.4%, respectively. There were 47-54% dose increase for superior beam edge and 37.6-35.2% dose decrease for inferior beam edge, as compared to the 50% field edge dose with the static dose distribution. There were 8.5 and 7.5 mm range increase for superior beam penumbras and 5.5 and 4.5 mm range increase for inferior beam penumbras, an important result corresponding to treatment volume.

结果：以正常人的平均值为例，在一个照射时距内，使用6 MV及18 MV光子射束， 10X10cm2照野10cm深度之中心轴下，照野上缘的剂量，分别为照野中心点剂量的73.5 %及77.2 %，照野下缘的剂量则分别为中心点剂量的31.2 %及 32.4 %，此剂量反映出因治疗中的呼吸位移，造成照野上缘较照野中心点有47 –54 %的剂量增加，及照野下缘有37.6 %- 35.2 %的剂量减少，相对照於静止态下照野边缘为中心点50 %剂量的状态。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。