光学镜面间隔测量中的色散研究

材料的色散会影响镜面间隔的测量精度,为了提高光学干涉法测量镜面间隔的精度,对材料色散效应进行理论分析和数值仿真,分别对LAK9、ZF6、H-ZF2、BAK7、K9光学玻璃进行仿真测试,得到了干涉信号峰值偏移量关系式,信号峰值偏移量与材料的一阶色散系数成正比。为了验证该关系式的正确性,搭建了一个镜面间隔测量实验平台,实验测量得到的干涉信号最大值偏移量与仿真测试结果的相对误差小于2%,考虑到实验过程中的误差因素,证明仿真测试得到的结果是正确的。     

不同下垫面水平大气相干长度的测量与分析

与温度脉动仪测量结果对比验证了大气相干长度仪测量结果的可靠性,分析了两种仪器测量结果存在的差异及原因。对比大气相干长度仪测量的博贺海面、海边及合肥水平大气相干长度得出如下结论:全天海面水平大气相干长度最大,海边次之,合肥最小;合肥水平大气相干长度具有典型的日变化特征,清晨、傍晚转换时刻变化范围约4~10 cm、4~15 cm;海边水平大气相干长度清晨转换时刻变化范围约8~15 cm,特征与合肥相似,傍晚转换时刻后保持在12 cm左右;海面水平大气相干长度清晨转换时刻变化范围约9~12 cm,傍晚转换时刻约从15 cm迅速增至50 cm并保持2 h后迅速减至28 cm。结合不同下垫面的特点、天气状况及海陆风转换造成的影响,对上述实验结果进行了初步分析。     

高斯谢尔模光束通过ABCD光学系统的偏振特性

推导了高斯谢尔模光束通过ABCD光学系统的交叉谱密度矩阵，研究了该条件下光谱偏振度的变化情况。比较研究了高斯谢尔模光束通过自由空间和聚焦光学系统的情况。研究表明，在自由空间中传输足够远的距离后光谱偏振度将达到稳定，在聚焦光学系统中光谱偏振度在焦面位置附近有明显的起伏变化，两者都与光源参量的选择有关。特别指出，位于焦面上...     

The impact of intrinsic cognitive load on the effectiveness of graphical help for coherence formation

Learning with multiple representations requires the mental integration of corresponding information. This highly demanding process of coherence formation can, for example, be assisted by inter-representational hyperlinks, which foster the visual search for correspondences. In three studies we analyzed the effectiveness of hyperlinks depending on the amount of intrinsic cognitive load (ICL), which is on the one hand determined by the complexity of the learning task and on the other hand by the learners’ expertise. In the first two studies we varied the complexity of the integration task and found that the hyperlinks were only effective for the less complex task (low ICL). In the third study the amount of ICL has been varied by the level of expertise and the effects supported the previous outcomes: the help again was only effective in conditions of low ICL (higher expertise), whereas with high ICL (lower expertise) it was ineffective.     

多信息相干技术在阳信洼陷构造研究中的应用

多信息相干技术是基于多种地震体属性的处理与解释技术，该技术以相干为基础，综合了地层倾角和方位角等多种地质信息。与常规相干相比，多信息相干不仅能进行断层和断裂组合的识别，而且，相干、倾角和方位角3种属性的叠合显示能指导我们进行精细的构造解释。在阳信洼陷构造研究中的应用结果证明，该技术是提高构造解释精度的有效方法。     

Study of coherence by speckle interferometry

A simple method for studying the time-dependent coherence of laser radiation by speckle interferometry is proposed and tested by experiment. __________ Translated from Izmeritel’naya Tekhnika, No. 7, pp. 25–26, July, 2006.     

相干体技术在火山岩预测中的应用

火山岩气藏地质特征复杂，岩相变化快，物性变化大，地震响应特征复杂，规律性差，预测困难。三维相干技术可以通过检测同相轴的不连续性，对断层、特殊岩性体进行识别。在松辽盆地北部徐家围子断陷深层火山岩的研究中，利用体属性多算子相干分析技术计算了高分辨率相干体、倾角体和方位角体，并采用HLS（色调、光亮度和饱和度）彩色模型显示这些地震属性体；然后结合三维可视化技术对火山岩的分布范围进行了预测。在相干体切片上，断层清楚，火山口和火山岩体分布范围清晰。     

Self-trapping Characteristics of Partially Coherent Optical Beam in Photonic Crystal Fiber under Compton Scattering

Using the mutually coherent function, the self-trapping of the circle partially coherent optical beam in the total internal reflective photonic crystal fiber（TIRPCF） under Compton scattering is studied. The study shows that the composition of the non-coherent optical beam in the optical spectrum and the diffraction effect are decreased by Compton scattering, and the probability of forming the soliton is greatly increased. The vibration peak value in the propagation, compressed degree, changed cycle, and radius of the soliton are all smaller than those before the scattering, but its coherent radius is larger than that before the scattering. In this propagation, the self-focusing plays a key role.     

A Possible Mechanism for Evading Temperature Quantum Decoherence in Living Matter by Feshbach Resonance

A new possible scenario for the origin of the molecular collective behaviour associated with the emergence of living matter is presented. We propose that the transition from a non-living to a living cell could be mapped to a quantum transition to a coherent entanglement of condensates, like in a multigap BCS superconductor. Here the decoherence-evading qualities at high temperature are based on the Feshbach resonance that has been recently proposed as the driving mechanism for high T_c superconductors. Finally we discuss how the proximity to a particular critical point is relevant to the emergence of coherence in the living cell.     

用相干函数消除系统反共振对燃气流冲击载荷识别结果的影响

在进行燃气流冲击载荷识别时,识别结果中存在系统特性的影响.文献[1]中,用系统的受迫响应进行识别.在识别结果中,系统反共振特性的影响仍不能消除.根据文献[2],用相干函数对识别谱进行修正,在识别结果中可以很好地消除系统反共振特性的影响.