基于音频特征的工程车辆工况识别研究

高效率地使用工程车辆是工程项目管理中节约成本的有效方法，无人监管环境下工程车辆的工况识别，是实现工程车辆高效率使用的有效手段。目前以GPS等技术为核心的车辆智能管理系统未对工程车辆进行工况识别，提出一种基于GRU循环神经网络的工程车辆工况识别方法，通过对工程车辆在不同工况下产生的音频信号进行分析，从中提取Mel倒谱系数作为主要特征，构建GRU循环神经网络模型进行训练和识别。实验结果表明，该方法可以实现对工程车辆工况的有效识别。     

Gamers,Surfers, Social Media Users: Unpacking the role of interest in English

Across stages of acquisition, second language (L2) competencies are contingent on the variation among individuals learning the language, in both informal and formal learning contexts. This study investigates a group of outliers whose extreme test scores serve as a foundation to examine them as individuals. The study addresses the outliers' characteristics as good L2 readers but poor first language (L1) readers. Combining quantitative (test results, survey, and language logs) and qualitative (focus groups and interviews) data among 21 adolescents in Norway (aged 16–17 years), the study identifies dimensions of individual language use in L1 Norwegian and L2 English. Findings revealed that they explained their English proficiency by the role of interest and their extensive use of English technology and tools outside school. In‐depth analysis identified three profiles: the Gamer, who spends up to 8 hr daily playing online games while using English mainly; the Surfer, who spends hours on the Internet, searching for authentic language situations, commonly involving English; and the Social Media User, who produces and consumes information in English through social media. Additionally, the Gamers read printed novels voluntarily outside the classroom. This study offers unique perspectives and new directions for future L2 research.     

AoIP广播播控系统设想

本文首先回顾了广播播控系统发展的几个阶段;其次分析了本台播控系统的现状、播控系统存在的不足和缺陷;最后通过充分比对传统音频矩阵架构与AoIP架构的优缺点,提出了全新播控系统架构设想和功能设想。     

Identification of AMR decompressed audio

More and more conversation recordings from phone calls are used as forensic evidence. To decide whether an unknown speech recording comes from mobile phone or not becomes an important issue in digital audio forensics. The communicating conversation recorded by mobile phones is encoded by Adaptive Multi-Rate (AMR) audio codec, which was adopted as the standard speech codec by 3GPP and widely used in GSM and UMTS. Therefore, AMR decompressed audio detection can be used to identify the source of the digital audio recording. Furthermore, it is helpful to locate the forgery position of the splicing AMR decompressed audio for forensic purposes. In this article, we focus on the identification of AMR decompressed audio, namely, given the waveform of an audio, we wish to identify whether it has been previously compressed by AMR codec or not. The artifacts introduced by the AMR codec will help to detect the source of the recordings. Based on our analysis, we find that the sample repetition rate of the AMR decompressed waveform is significantly greater than the regular waveform. Therefore, we employ the sample repetition rate as a feature to identify the AMR decompressed audio. The experimental results show that this feature is robust and effective.     

基于Fibonacci变换的音频相位水印算法

本文将Fibonacci变换作为一种水印预处理方法,和传统的相位水印方法结合,提出了一种基于Fibonacci变换的音频相位水印算法,改进后的算法和传统算法相比具有更好的鲁棒性．     

音频大地电磁法在新疆阿依拉苏铀矿勘查中的应用

阿依拉苏铀矿点具构造控矿的特征,但地表断层产状较陡,无法判断深部断层延伸情况。文章在综合地质调查的基础上,通过音频大地电磁测深,初步了解地下地质体的空间展布及断层的延伸情况。经钻探工程验证,深部存在铀矿体,最终认为地表矿点为深部含矿体错动地表所致。     

高密度电法和AMT法在河北阜平后备水源地勘察中的应用

该文介绍了河北阜平县后备水源地勘查中,通过高密度电法和音频大地电磁测深相结合的方法,对规划区内的断裂性质、分布位置以及第四系的覆盖层厚度进行了较详细的勘察.经钻探验证,物探推断结果可靠,为水文地质勘察提供了较准确的资料.     

基于单片机的住宅智能安防系统设计

基于公共电话网的自动防灾报警系统,当系统检测到非法入侵者及火灾、煤气泄漏等报警信号时,报警主机发出报警声,同时通过电话线将警情报告给数个指定电话,保障财产及生命安全;设计是以单片机AT89C51,双音多频解码集成电路MT8888、ISD1420芯片、AT24C02串行EEPROM为核心;红外探测器、门磁探测器、感烟探测器、燃气泄漏探测器等探测灾情;当有非法入侵时,单片机执行中断程序,播放的语音,震慑盗贼,使其停止盗窃行为并自动拨打设定好的手机号码,起到防盗的作用;当有火灾及有害气体泄漏等灾情发生时,通过拨打设定号码,保护财产安全。     

语音同步的可视语音合成技术研究

为了提出一种真实感较强的可视语音合成方案,对目前国内外主流研究方法进行了探讨．在基于对可视语音合成问题分析的基础上,提出了可视语音合成系统研究方法中首先要解决的2个问题:视觉语音特征模型的构建和声视频映射模型的构建．分析了目前国内外研究方法的主要解决方案,提出了在未来研究中本系统将采用的系统框架和重点研究内容．     

彩铃业务中铃音资源自由剪辑方法研究

介绍了现有铃音剪辑方式,分析了现有剪辑技术和流程存在的问题。在此基础上,提出了铃音资源自由剪辑方法,该方法提高了用户对铃音剪辑业务的喜爱度,使用户真正地参与到业务中,增加了业务趣味性,使整个处理过程的剪辑速度加快,提高了存储效率。