基于MEMS传感器的军民两用戒指型无线麦克风系统的设计

戒指型无线麦克风应用最新的MEMS麦克风传感器并利用2.4G无线技术实现了小体积、低功耗、远距离和高品质的无线音频传输。其最突出的特点是具有高保真双声道立体声音质,且携带轻便、体积小巧、外观新颖。戒指外观赋予了麦克风隐蔽性强的特点,这使得戒指型无线麦克风可军民两用。军用时可作为窃听器,民用时可充当KTV、集会演讲、教学、电脑等麦克风,具有广阔的应用前景和市场竞争力。     

建国70周年庆祝活动转播音频系统A系统的设计及声音制作

介绍庆祝中华人民共和国成立70周年活动转播A系统音频系统架构、声音制作内容、传声器布局设计及混音制作方法。     

豫剧现代戏《重渡沟》音响系统的设计与调试

阐述在第十二届中国艺术节上豫剧现代戏《重渡沟》展演的音响系统的计设方案、传声器的选用、调试过程及经验。     

The velocity of sound

A new method for measuring the velocity of sound over short distances has been devised in which sixty pulses per second cause a sinusoidal curve to appear upon an oscilloscopic screen.As the receiving microphone is moved away from the sound oscillator, the crest of the sine curve moves across the oscilloscope, completing the circle in one-sixtieth of a second. The actual velocity of the sound is easily calculated after the distance moved bv the microphone has been measured.Application of the probability laws and the error curve shows that the method is very accurate, providing the alternating current maintains itself invariably at sixty cycles per second. The average of twelve hundred measurements gives 331.364 ± 0.043 meters per second at zero degrees centrigrade.     

无线多媒体传感器网络研究初探

无线多媒体传感器网络(Wireless Multimedia Sensor Networks,WMSNs)是一种新型的传感器网络,其节点装备有麦克风、摄像头及其它传感器,可以获取多媒体信息。文章分析了无线多媒体传感器网络与传统无线无线传感器网络的异同点,进一步探讨了无线多媒体传感器网络的应用及影响无线多媒体传感器网络研究与设计的关键问题。     

Straus Paket拾音制式间距的实验分析

以钢琴为研究对象,通过主观评价方法探究Straus组合拾音制式在不同间距下的拾音范围角度以及录音规律,结果表明该传声器组间距50 cm时,可以得到理想的钢琴音色,间距为20 cm也具有不错的实践应用价值。     

Design and implementation of a rectangular frequency invariant beamformer with a full azimuth angle coverage

A novel design of the frequency invariant beamformer based on a rectangular array is proposed with two unique features: there are no taped delay-lines (TDLs) or any other temporal processing involved and the resultant beamformer has a full 360° azimuth angle coverage. This leads to a wideband beamformer with complex-valued coefficients and its implementation is not as straightforward as the traditional ones. Depending on whether the input signal is complex-valued or real-valued, special arrangements and structures are required for its effective implementation. Several design examples are provided with a satisfactory frequency invariant property. Two sets of implementation results are given based on both simulations and data collected by a planar microphone array system.     

高校图书馆智能服务机器人的设计与实践——以中国矿业大学图书馆为例

[目的/意义]人工智能技术飞速发展,已被越来越多地应用于智慧图书馆的研究与实践。实现高校图书馆智能服务机器人的智慧化服务,可有效提升高校图书馆的服务效率,为智慧图书馆建设提供可行的参考案例。[方法/过程]运用语音技术、四元麦克风阵列、语音知识库、机器人运动控制等技术,以中国矿业大学图书馆为例,设计与实现了高校图书馆智能服务机器人,并探讨智能服务机器人提供智慧化服务的新模式。[结果/结论]实践证明,智能服务机器人可实现语音互动、智能咨询、信息播报、路线导引等智慧化服务,为读者提供智能化的互动体验,创新高校图书馆智慧服务模式,是高校图书馆向智慧化方向发展的重要探索。     

My Dinner with Stelarc: A Review of Techno-flesh Hybridity in Art

An interdisciplinary introduction to postevolutionary performance artist Stelarc and aspects of some human-technology hybrid tropes in which he works: Obsolete Body Suspensions with hooks in the skin; an expanding, beeping, Stomach Sculpture, which he ingested and filmed; the “Ping Body” event during which his limbs (arm, leg) were controlled with electric stimulation by an Internet audience, while simultaneously Stelarc controlled a prosthetic robotic “Third Hand” with repurposed muscles in his abdomen and leg; and a tissue-culture installment under the skin of his forearm—his Third Ear—which is meant to contain a microphone and relay audio to an online audience. The article reviews critical contexts such as cyberpunk literature, biological and data networks, embodiment, scientific practices, electric body manipulation, and aesthetic and interpretive concerns. It closes with an account of the author's personal encounter with Stelarc at a dinner party, and the role of emotions, such as fear, in postevolution.     

政府舆情治理能力影响因素及可持续发展路径研究

[目的/意义] 在自媒体时代,人人麦克风的时代已经开启,网络是社会舆论的放大器,随着网络环境的复杂化,给政府舆情治理带来很大的压力,探索政府舆情治理的影响因素,寻求政府舆情治理的可持续发展路径,是一个值得研究的问题,具有一定的实践意义。[方法/过程] 基于此,采用灰色关联分析与定性比较分析相结合的混合方法,基于外部因素和内部因素两个维度,探究政府舆情治理能力的影响因素,收集2017年我国31个省份的相关数据,运用MATLAB软件编程,实现灰色关联分析算法,计算政府舆情治理能力与各影响因素的关联度。在灰色关联分析的基础上,运用定性比较分析方法,基于系统的视角,分析不同因素组合对政府舆情治理能力的影响,探索政府舆情治理能力的可持续发展路径。[结果/结论] 研究提出了分别适合我国东部省份、人口大省地区、西北地区省份的3种可持续发展模式,有助于地方政府根据自身实际情况采取相应的措施。     

产业空心化和美国金融危机的探讨

当今世界经济虚拟化的趋势主要表现在两个方面：产业空心化和虚拟经济的高杠杆化。这两方面的过度发展和局部失衡是导致美国金融危机的重要原因。本文从产业空心化的理论、现状和影响等几个方面入手,讨论美国金融危机当中的一些经验和教训。当中对于我国经济发展所面临的具体问题也可以获得一些启示。     

美国钢铁行业的兴衰及启示

钢铁行业作为美国经济的三大支柱产业之一,在国民经济发展的各个阶段都发挥着重要作用。钢铁发展,则经济发展;钢铁衰退,则经济不振。文章通过分析美国钢铁行业一个多世纪兴衰的因素,兼并重组过程,揭示钢铁行业发展的规律性,可以为我国钢铁行业的发展概括出一些宝贵的经验和教训。     

W. H. Fox Talbot and the history of photography

This year marks the centenary of the death of W. H. Fox Talbot, the inventor of the negative/positive process of photography. This article reviews his contribution to the development of photography in relation to that of other pioneers, notably Niépce, Daguerre, and Archer. It also considers the consequences for the development of photography in Britain of Talbot's strict adherence to his patent rights.     

浅析美国动漫产业的文化与现状

现在劝漫产业是资金密集型、科技密集型、知识密集型和人才密集型的重要经济一文化产业,是21世纪开发潜力巨大的世界热门产业.英国是当今世界上最大最强的动漫产业国.本文对美国的动浸广业链的形成,动漫产业的游戏规则、动漫产业的职业精神、动漫的消费环境等方面进行了一定的剖析.     

吴有训的X射线研究与“学术独立”

分析吴有训在上世纪30年前后开展的X射线散射研究及这些研究的学术价值和背景,论证其与当时中国“学术独立”的关系,指出这些研究是中国物理学走向“学术独立”的第一步,并为中国科学的“学术独立”起到了很好的推动和示范作用。     

关于紊蒿属与百花蒿属异同的商榷

 It is quite unreasonable reducing Elachanthemum Y. Ling et Y. R. Ling into Stilprolepis Krasch. and it is so wrong idea attributing the achenes and cupuliform corolla (as a matter of fact, the cupuliform corolla is originally from the Stilpnolepis Krasch.,  not from Elachanthemum Y. Ling et Y. R. Ling) of Elachanthemum Y. Ling et Y. R. Ling to “earlier Development” in the paper published in Act. Phytotax. Sin. 23(6): 470-472. 1985.      In Elachanthemum Y. Ling et Y. R. Ling, bracts of capitula herbaceous, obviously floccose on the abaxial surface and membranaceous only on the margin, corolla of bisexual florets tubu- lar, achenes oblique, obovoid, and the exine of pollen grains minutespinulate, but in Stilpnole- pis Krasch., on the contrary, whole bracts membranaceous, glabrous, corolla of hermaphrodite florets cupuliform or campanulate, achenes long-clavate or fuciform and the exine of pollen grains remarkably spiny.     

美国专利制度创新及其影响

本文首先回顾了20世纪80年代以来美国专利制度创新的基本背景，进而从四个方面分析和考察了美国专利制度创新对专利活动和技术创新活动产生影响的作用机制和实际效果，最后对我国专利制度发展和专利战略提出一些建议。     

“新经济”与美国经济的增长前景

IT革命推动了90年代美国经济经历了以“新经济”为特征的稳健增长，本文剖析了IT革命对美国经济增长的直接贡献和潜在影响，研究表明IT革命正在改变着美国社会的生产方式并且提升了美国经济的劳动生产率和全要素生产率，在此基础上，本文还对美国经济的增长前景作了简要预测。