现代声训研究

现代音韵学的发展,使得我们对古代汉语词义的研究更加深入、清晰,而词义的清晰研究是我们研究古代汉语的关键。     

输液管道振动声辐射研究

针对输液管道振动大,噪声污染严重的问题,本文结合振动理论、声场理论、应用有限元以及边界元方法对输液管道受激振动的噪声辐射过程进行研究,并提出了一种新的低噪声管道结构设计方法。     

Frontiers of Preventive Conservation

ABSTRACT

This work considers areas where our present lack of knowledge curtails the effectiveness or efficiency of preventive conservation practice. Mixed media, especially archaeological metals and organics have incompatible requirements for relative humidity (RH). An approach based on understanding the risk versus RH for both materials and considering the showcase performance is elucidated as a solution. Pollution, both the mixed atmospheres around most cultural heritage and the complex, variable nature of deposited particles, are further areas in need of more research. Damage functions and measurement of object deterioration rates are investigated as a path forward, and examples are given.     

司空图感性学三维视角下评析《虞美人》的英译本

在诗歌翻译批评中,司空图诗学思想即三维说提供了一个很好的诗评原则。本文从司空图感性学三维出发,对《虞美人》3个英文译本的音像美、视像美和含蓄关进行了比较研究。好的诗歌译本应从听觉、视觉和味觉3个维度尽量保留和再现原诗的意境美,实现原诗的“韵外之致”、“景外之景”和“味外之旨”。     

激光干式除漆的声波监测与分析

利用激光除漆过程中会产生声音信号,通过实验的方法,用声音记录装置记录下激光除漆过程中的声波信息,并且对采集到的声波信息分别进行了时域和频域分析.从声音信号的时域分析可以得到漆层被清洗前后声波信号强度没有显著变化,说明短脉冲激光干式除漆的主要作用原理是基底振动效应,而不是烧蚀效应.从声音信号的频域分析可以得到漆层被清除前后谱峰位置有明显的不同,依据谱峰的变化情况可以辨别漆层是否被清洗干净,为激光除漆提供了一种新的判断依据.     

31例经枕下乙状窦后入路显微镜手术切除巨大听神经瘤患者的围手术期护理

目的总结31例经枕下乙状窦后入路显微镜下手术切除巨大听神经瘤患者的围手术期护理,提高手术成功率,减少并发症的发生。方法总结31例巨大听神经瘤患者围手术期的护理。结果31例患者术后均治愈出院,1例复发。结论加强心理护理,加强病情动态观察,注重神经系统的护理,减少并发症的发生是听神经瘤患者护理的重点。     

一类新型HID灯驱动电路拓扑的研究

设计了一种新型HID灯高频驱动电路拓扑．该拓扑应用高频半桥驱动,由DB3与RC回路构成低频锯齿波发生器并同步调制高频方波,破坏高频HID灯管壁驻波产生,消除HID灯的声谐振现象．经对250WHID灯电路调试与验证,该拓扑具高功率因数、高效率、高性价比等特点．     

墨西哥汉语习得者上上联读汉语双音节词的声学分析

上上联读汉语双音节的音变读音是墨西哥汉语习得者习得汉语语音的一个难点,为找出墨西哥汉语习得者上上联读双音节变调的偏误规律,对比分析男女两名汉族人与四名墨西哥汉语习得者的19组上上联读汉语双音节的发音声学数据,发现墨西哥汉语习得者上上联读汉语双音节的音变读音前一音节的正确率共占上上联读总音节数的68.42%,后一音节的错误率占总音节数的11.84%,偏误率88.16%,根据后一音节的偏误类型上的比例,列出了如下偏误类型降级序列：调域偏误（起点、拐点、终点偏低〉起点、拐点、终点偏高）〉调型偏误（拐点偏高〉终点略低）。     

Deformation of red blood cells using acoustic radiation forces

Acoustic radiation forces have been used to manipulate cells and bacteria in a number of recent microfluidic applications. The net force on a cell has been subject to careful investigation over a number of decades. We demonstrate that the radiation forces also act to deform cells. An ultrasonic standing wave field is created in a 0.1 mm glass capillary at a frequency of 7.9 MHz. Using osmotically swollen red-blood cells, we show observable deformations up to an aspect ratio of 1.35, comparable to deformations created by optical tweezing. In contrast to optical technologies, ultrasonic devices are potentially capable of deforming thousands of cells simultaneously. We create a finite element model that includes both the acoustic environment of the cell, and a model of the cell membrane subject to forces resulting from the non-linear aspects of the acoustic field. The model is found to give reasonable agreement with the experimental results, and shows that the deformation is the result of variation in an acoustic force that is directed outwards at all points on the cell membrane. We foresee applications in diagnostic devices, and in the possibility of mechanically stimulating cells to promote differentiation and physiological effects.