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普通话基础元音基频发展的声学分析
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作者 张云秋 赵学彬 《首都师范大学学报(社会科学版)》 CSSCI 北大核心 2014年第3期93-100,共8页
本研究选取九个年龄组别不同性别的发音合作人为实验对象,测量了基础元音在九个年龄组不同性别下的基频阶段性发展特征,在此基础上考察了儿童产出的基础元音在基频表现上与成人的异同。数据表明:即使那些听觉上与成人发音比较接近的基... 本研究选取九个年龄组别不同性别的发音合作人为实验对象,测量了基础元音在九个年龄组不同性别下的基频阶段性发展特征,在此基础上考察了儿童产出的基础元音在基频表现上与成人的异同。数据表明:即使那些听觉上与成人发音比较接近的基础元音,其各基频特征也与成人的不完全相同,有自己的倾向性规律。我们认为生理因素在底层制约了基础元音的基频发展特征,并用量化理论对此进行了初步的分析和解释。 展开更多
关键词 基础元音 基频发展 声学分析
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Digital Dividend: The Path Towards Business and Marketing Development
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作者 George Mastorakis 《Chinese Business Review》 2011年第12期1131-1137,共7页
Wireless radio spectrum is an important resource that allows for increased business development, throtigh the provision of services using wireless networking infrastructures. Since radio spectrum is limited, an optima... Wireless radio spectrum is an important resource that allows for increased business development, throtigh the provision of services using wireless networking infrastructures. Since radio spectrum is limited, an optimal utilization of it is required, by adopting advanced spectrum management methods. The current transition from analogue to digital terrestrial television may act as a unique opportunity, in order to reallocate this valuable spectrum resource. After the transition, a part of the traditional analogue television spectrum bands will be completely released, allowing for the use of this spectrum by sophisticated wireless systems. Furthermore, digital terrestrial television interleaves spectrum bands in order to avoid possible interference between adjacent channels used by broadcasting stations, thus leaving spectrum holes exploited by novel wireless networks, namely unlicensed secondary systems. In this context, this article investigates business and marketing development issues, arising by utilizing released and interleaved television spectrum bands 展开更多
关键词 radio spectrum digital dividend business and marketing development
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