| 1. | Vca voltage control amplifier
压控增益放大器 |
| 2. | Temperature control amplifier
温度控制放大器 |
| 3. | Vca voltage controlled amplifier
压控放大器 |
| 4. | Broadband control amplifier
宽带控制放大器 |
| 5. | Study of intelligent aeronautic engine temperature - control amplifier testing system
航空发动机温控放大器智能测试平台的研制 |
| 6. | But homemade ratio amplifier still stays the base of step control . the stepless controlling amplifier always depends on the import
但国内在开发比例放大器方面一直停留在档位式调节基础上，具有连续调节式的比例放大器多依靠进口。 |
| 7. | A way of controlling the voice volume in a wide range with program - control amplifier , the hardware circuit and constructing method of software are given
摘要采用程控放大器对音量进行宽?围控制，提供了具体硬件电路并指出了软件构成方法。 |
| 8. | The relays may lack the high speed switching characteristic of the solid - state state switches used by other preamplifiers , but they also have none semiconductor distortions and noise which accompany analog gates and voltage controlled amplifiers
与其他前级放大器所用的半导体开关相比，这些继电器缺少高速转换的特性，但它们没有随着模拟开关和电压控制放大器所带来的半导体失真和噪声。 |
| 9. | Through analyzing strata ' s absorbtion and attenuation , the specialty of ssf in system - one ( two ) and 24 - bit a z a / d , the scheme to improve the data acquisition system is brought forward including the design of multiple differential spectrum equilibrium filter ( mdsef ) and program control amplifier
通过详细分析地层的吸收衰减特性， system - one ( two )频谱整形滤波器及24位a d的特点，对现有采集系统提出了改进方案。其中包括对多级微分频谱均衡滤波器的理论设计，程控型前置放大器的理论分析与设计。 |
| 10. | The first part of the paper is designing the testing project for grounding resistance and insulation resistance in a new way . using 16bits ad converter with programmable control amplifier replaced the way which used changing resistance to change measure range . lt is not only improved testing precision and develop the system expediently , but also reduced the area of the circuit boardwith the new way . in order to make the electric implement safety testing system have upstanding expansibility , the software and hardware of the system adopted the modularization design . adopted mcu atmegal28 as a master mcu which control mmi , realtime clock and communication with slaver mcu . atemga8 as the slaver mcu to realize testing function . so it is easy to add or reduce the testing project . the testing implement system has been developed successfully , and the comments for the system is that it has high precision , high expansibility and easy maintain . but considering the electric implement system should have intelligence and humanity abi lity . so this paper bring forward a scheme of electric equipment safety testing embedded system with speech control . after introduce the basic theory of speech recognition , the paper expatiate the characters of this system . the system is a noise conditon , not special people , small glossary , insulation word system . with these characters design the speech recognition as fellow . utilizing cross zero ratio and short energy to ensure jumping - off point and end point ; adopting mfcc as the character parameters of speech recognition ; the character parameters than be recognized by dtw . in order to ensure the credibility of this project , first realized by matlab in computer
在介绍了语音识别的基本原理后，阐述了本系统的特点：本系统是一个噪声环境下非特定人、小词汇量、孤立词的语音识别系统。根据本系统的这些特点设计了如下语音识别方案：利用过零率和短时能量相结合的方式确定语音端点；采用mel频率倒谱系数( mfcc )作为语音识别的特征参数；得到的特征参数最后通过动态时间规整( dtw )的模式识别方法进行识别。为了确保本系统实现方案的可靠性，首先通过计算机利用matlab软件来仿真，在算法仿真实现后又进一步增加环境的复杂性：加上较大的环境噪声、突发性的噪声等，再通过修改参数、修改参考模板、两级识别等各种提高语音识别精度的方法来提广东工业大学工学硕士学位论文高识别率。 |
