| 1. | Characteristics of pulse code modulation for voice - frequencies
音频脉冲编码调制特性 |
| 2. | Research on modulation characteristics of high - power semiconductor laser diode
大功率半导体激光器调制特性的实验研究 |
| 3. | ( 2 ) experiments the relation between characteristics of microbent multi - mode fiber sensor and its bent radius or source wavelength , gives theoretical analyses
通过实验研究了多模光纤弯曲调制特性与弯曲半径及光源波长的关系，并对其特性曲线进行了理论分析。 |
| 4. | The paper focuses on the following work : ( 1 ) analyzes fiber sensing theory of intensity modulation ; deduces modulation formula of reflex sensor and studies its characteristics using computer ; experiments the sensing characteristics of reflex types and fiber bundles
其中的强度调制型光纤传感技术最具有实用化性，本论文将研究其调制特性并进行强度调制型光纤真空度传感实验，主要的研究工作包括： 1分析了强度调制型光纤传感原理。 |
| 5. | 1 . firstly , the mathematical model of fiber pair with the factors of reflector shape and inclination is established . then , the numerical simulation is fulfilled , along with a series of rules of the influence on intensity modulation property caused by multimode fiber parameters , the factors of reflector shape and inclination
然后，采用数值仿真的方法系统地研究了多模光纤参数(包括光纤对轴间距、光纤芯径和光纤数值孔径) 、反射面倾斜因子以及形状因子对rim - fos强度调制特性的影响规律。 |
| 6. | Quantum capture is a complicated process and capture time computation and experiment test are provided . it is difficult to ascertain carrier ' s transportation and distribution in multiply quantum wels and tunneling time and heating emitting time computations are also provided . optical gain whose formula is complicated is a critical parameter and it is useful for structuring model to obtain a concise formula by means of experiment curve
详细说明了确定半导体激光器速率方程的一些重要参量的方法，如：载流子在三维sch区的输运行为对激光器的调制特性有较大影响；量子阱对载流子的捕获是一个复杂的过程，文中给出了量子捕获时间的计算方法以及实验证明；多量子阱中载流子输运与分布也是相当复杂的问题，文中给出了隧穿时间与热发射时间的计算方法；光增益是关键的参量，它的解析式相当繁琐，由实验曲线拟合其较为简明的经验式，对定模工作是有利的。 |
| 7. | Compared with non - passerine , they appeared longer syllable length , higher basic frequency and more viable frequency ranges . though the amplitude modulation properties enhanced their vocal production , the type of syllable is still stable and less of variety . so the phrase consisted of syllables are comparatively few and changes of the tone are relatively less
且表现出很强的频率调制特性和特有的幅度调制特性，相对的音节时程比较长，基频较高且频率变化范围较大，所特有的幅度调制特性更增加了其控声的能力，但其音节的种类仍很单一，缺乏变化，由音节所组成的句型较少，音调变化幅度不大，因此，其叫声质量尽管较非鸣禽有所改善，但相对鸣禽而言却又远远不如。 |
| 8. | Furthermore , the range of measurement of it was pointed out . all the analysis shows that our crsi 1il can be used to measure the spatial mid and low frequency wavefront distortion . 5 . based on our crsi and algorithm , the phase modulation characteristic of an lcslm was measured
五、利用环路径向剪切干涉仪共光路、双光束干涉的特点，全场准确测量了液晶空间光调制器的位相调制特性，并且利用它的位相调制特性实现了台阶位相板畸变波前的补偿，由此证明了液晶空间光调制器可用于控制波前畸变。 |
| 9. | And the correction of a step wavefront produced by a step phase plate is accomplished successfully . 6 . according to the phase modulation characteristic of an lcslm , arbitrary complicated wavefronts were modeled . the result shows that lcslm can be use to test the wavefront sensors and controller if lcslm has wider dynamic range and perfect optical quality
六、通过利用液晶空间光调制器的位相调制特性，成功地模拟产生了任意畸变波前，指出若该器件有更大的位相调制动态范围和均匀性，将有可能成为校验波前传感设备和波前畸变控制系统性能的有力工具。 |
| 10. | The photoabsorption properties of three kinds of br molecule films ( the wild - type br , the chemical enhanced br , the gene - variant br ) are investigated by measuring their absorption spectrum . using the gene - variant br film as a light - modulator , by the experiment of write - readout image and the analysis of image contrast , the light - modulated property of the modulator is studied . the relationship between wavelength of the modulated light and response time of the modulator is discussed emphatically
本论文概述了细菌视紫红质分子结构、功能特性及研究发展的历史与现状，介绍了目前已有的和潜在的一些重要应用，通过对吸收光谱响应特性的测试研究了三类br分子薄膜(野生型，化学修饰型，基因修饰型)的光吸收特性，通过图像的记录/读取实验及图像的对比度分析探讨了基因改性型br分子薄膜的光调制特性，着重研究作为一个光调制器件对调制波长和调制时间的响应特性。 |
