| 1. | In the section 2 , we studied the characteristic of angle tuning curves of clbo
第二章对clbo晶体的角度调谐参量过程进行了理论研究。 |
| 2. | The topology of cfs in a - 1 indicated the rule of the neural projection from gmb to primary auditory cortex . the tuning curves of 34 neurons have been recorded and analyzed
听神经元cf分布的中文摘要一2一这种分域特性反映了从mgb到初级听皮层纤维投射的规律性。 |
| 3. | We also demonstrated that one corticofugai pathway is that auditory cortex sends excitatory inputs to icx and then sends inhibitory inputs to icc from icx . under free field sound stimulation conditions , we studied the sound direction effect on frequency tuning curves of inferior collicular ( ic ) neurons
本研究首次提出了听皮层调制皮层下神经元方向性性信息的概念，并发现，下丘神经元频率调谐的方向敏感性的形成中，听皮层的下行调制有重要作用。 |
| 4. | This study showed that the mt and sharpness of frequency tuning curves increased as the sound direction changed from contralateral to ipsilateral azimuthal angles . it suggests that sound direction effect on frequency tuning may be through the complex interplay between the excitatory and inhibitory inputs . the application of gaba ( a ) antagonist , bicuculline , lowered all mts but the application did not abolish direction - dependent variation in mt
听皮层的抑制性影响使大多数神经元在蝙蝠最敏感的声源方位c - 40的频率分辨能力明显提高，同时使c - 40和i - 40的最低阈值的差别进一步增大，提高了信噪比，提高下丘听神经元对声源方位和最佳频率的分辨能力。 |
| 5. | We have calculated the type - i and type - ii angle tuning curves of clbo according to the momentum and energy conversion laws , and the sellmeier equations of clbo . by comparing to that of bbo , we can see that the shortest wavelength of clbo is shorter than that of bbo both in type - i and type - ii phase - matching , especially in type - ii . from it we can see clbo is really a new kind of nlo crystal in opo
从动量、能量守恒和clbo晶体的sellmeier色散方程出发，给出了clbo晶体、类相位匹配的角度调谐曲线，并与bbo晶体进行了比较，得到了在类相位匹配和类相位匹配情况下， clbo晶体的最短波长都比同等条件下的bbo短的结论，尤其在类相位匹配时性能更加优良。 |
| 6. | Were used for this study . durations of tone and weak white noise bursts used as sound stimuli were both 40 ms ( 2 - ms rise - decay times ) , and delivered synchronally at 2 per second in free field . 177 neurons were obtained in this experiment , and frequency tuning curves ( ftcs ) of 76 ic neurons were measured in our study
本实验共用12只健康、听力正常的成年小鼠，雌雄不拘，共获得177个神经元，测量了76个神经元的频率调谐曲线( frequencytuningcurve ， ftc ) ，发现弱噪声对神经元ftc的影响有三种类型：锐化、拓宽和基本不受影响。 |
| 7. | Based on these foundations , we give a perfect scheme of the bbo opos : single pass amplification coefficient of the opg under different pump intensity is calculated ; collinear type - i and type - ii phase matching tuning curve pumped by the q switch nd : yag various harmonics as well as noncollinear type - i tuning curve are calculated in details ; the effect of the walkoff for the nonlinear effect coefficient and the group velocity matching are analyzed ; the acceptance angle in parametric process is calculated ; the numerical threshold of the bbo opo is calculated ; the process of the saturation and depletion of the pump beam are analyzed ; the relationship of the conversion efficiency and reflectance of output mirror are discussed ; various linewidth controlling methods are discussed ; the improvement of the beam quality applying the unstable cavity is discussed ; and the crystal bbo design is considered
在此基础上，给出了一整套bbo - opo激光参数设计方案：计算了不同泵浦强度下的参量放大倍数；详细计算了在nd : yag调q激光器各次谐波泵浦条件下的共线类和类相位匹配的调谐曲线，以及非共线类相位匹配调谐曲线；分析了走离角对非线性系数和群速匹配的影响；计算了参量过程的允许角；计算了bbo - opo的理论阈值条件；分析了饱和与泵浦光束的消耗过程；给出了转换效率与超过泵浦阈值的倍数的关系；讨论了转换效率与输出镜反射率的关系；讨论了线宽控制的各种方法；研究了利用非稳腔改善光束质量的方法；考虑了bbo晶体的设计。 |
| 8. | The tuning curve of type - i phase matching of bbo opo are measured with accuracy ; the maximum conversation in total of the system is about 31 % at 615 . 6 nm , and it is fitted well with the gtp formula ; in the end we compared the output linewidth and unstable cavity far field beam qua lity of the bbo opo under the condition of type - i phase matching and type - ii phase matching , it is proved that we can obtain the parametric output of linewidth less than 0 . 3 nm and the beam divergence angle approaching diffraction limits by take the advantages of type - ii phase matching and unstable cavity designs
测量了该系统的转换效率最大为31 ，并能与理论公式极好地吻合，最后比较了在类相位匹配条件下和类相位匹配条件下的bbo - opo的输出线宽，以及非稳腔的远场光束质量，实验结果表明，利用类相位匹配以及非摘要稳腔设计可以获得线宽小于0 3nlm 、光束发散角接近衍射极限的参量光输出。 |
| 9. | Corticofugal modulation of frequency tuning of inferior collicular neurons in big brown bat , eptesicus fuse us chinese science bulletin , 2000 in order to explore the possible mechanism of corticofugal modulation of excitatory frequency tuning curves ( eftcs ) of midbrain neurons , we examine the change of sharpness , frequency - intensity response area , minimum threshold of both eftcs and inhibitory frequency tuning curves ( iftcs ) of inferior coliicular neurons during corticofugal modulation using two - tone inhibition paradigm and micro - electrical stimulation technique
第二章大棕幅听皮层对中脑下丘听神经元频率调谐曲线的调制科学通报， 2000用双声刺激的方法和电刺激技术，进一步研究了在激活听皮层前后下丘听神经元兴奋性和抑制性频率调谐曲线的锐度、频率强度反应区域、最低阈值的协同变化 |
