“耳朵经济”时代声音流广告发展路径分析--以喜马拉雅APP为例

广告在当今媒体宣传中占据较大比重。随着技术的发展,广告的形式也越来越丰富。其中,音频媒体的数字化改变了音频内容生产、消费和商业模式,同时也催生了声音流等新型数字广告形式。本文将从声音流广告本身出发,分析其发展现状、指出其问题所在并提出相应的发展策略.

外语教学中意义流的重要性和作用

在语言的实际运用时,意义的表达被融入了一定语言背景、伴随了许多体态语言和丰富的语音语调,它是体现了一定思想的活的、动态的意义,涉及一定的参与者、事件和行为,具有线性、连续性和整体性特征。由威廉·詹姆斯的“意识流”,衍生出“意义流”概念,并引入“声音流”和“文字流”,进而阐明意义流在外语教学中的重要性和作用。

浅谈流行歌曲与德育教学

所谓流行歌曲,一般是指通俗易懂、且广泛流传的歌曲。对于那些团结、教育人健康向上的歌曲当然无可非议。然面,对于低级庸俗的“流行歌曲”另当别论了。 有位中学生的家长曾对我说:“我那个孩子成天就唱什么情呀、爱呀的歌曲。就是不好好学习功课,这样下去怎么得了呀!” 还有位学生家长谈到:为了让孩子多学知识特意给他买台收录机,哪知孩子尽买些“流行歌曲”磁带,听那些哼哼唧唧或狂喊乱叫的歌儿。家长批评不但听不进去,反说家长老脑筋,不时髦。

古人之“乐”

古人之“乐”樊美筠后人所谓的“音乐教育”，在我国有着渊源流长的传统，早在两、三千年前的周代，明确的“乐教”意识就已经产生，不过，古人之“乐”与今天人们所说的音乐教育还是有很大的不同，它有自己的侧重点，了解这一点，不仅对于我们今天进行音乐教育有借鉴和启...

泓格新发表设备远程维护方案M2M-720-A

特色·支持网络声音流媒体传输·支持网络串行端口（RS-232，RS-485）数据传输 ·支持VirtualCorn通讯·提供网页控制与管理接口·具备Server与Client功能，Server功能最多可管理64组的Client设备（如：M-4132，M2M-720-A，M2M-710D等）·采用Linux2．

肖天、杨阳渴望真情

“我心中只有你,把你忘记真不容易,你是我一生最好的朋友,我真的真的好想你,不能让你在心中溜走,心里有了你已足够。”这前《九九情歌》首周推出已在广东厂播新歌榜上榜,并占据着第六位,据悉,《九九情歌》在广西南宁上榜后,在南宁的街头上还出现了盗版CD。

Centering Marginalized Voices： The Study of Community Radio in India as an Agent of Social Change

Community Radio is a medium which the different threads mingle together brings different social threads together and weaves a vibrant fabric where all without compromising their original composition. Freedom of speech and expression is the cornerstone of this medium. In India, Community Radio started its journey in 2004, with the purpose of bringing different sections of the society together so that they can share their experiences, fears, and ambition. Social intervention has been one of the primary agenda Community Radio. Through various awareness-raising programs, it aims to bring positive social change in the lives of people residing around its transmission zone. It also aims to include different sub-sections of its community who are often excluded from the mainstream media.

The Influence of an Acoustic Field on the Bed Expansion of Fine Particles

Fine particles are difficult to fluidize due to strong interparticle attraction.An attempt has been made to study the bed expansion of silica gel(dp=25μm) powder in presence of an acoustic field.A 135 mm diameter fluidized bed activated by an acoustic field with sound intensity up to 145 dB and frequency from 90 Hz to 170 Hz was studied.The effects of sound pressure level,sound frequency and particle loading on the bed expansion were investigated.Experimental results showed that,bed expansion was good in presence of acoustic field of particular frequency.In addition,it was observed that in presence of acoustic field the bed collapses slowly.

The Free-Flowing Voice and its Connection With the Mother Tongue

Does the native tongue confer greater authenticity and connection？ And how does this connect with languages acquired later in life？ From thirty years of directing, training, and auditioning actors from a range of ethnicities, I have believed that the mother-tongue has a particular and organic connection for an actor, one difficult to achieve in any other language. This belief was confounded in a laboratory conducted with Romanian actors, March 2013. The work was performed in both English and Romanian and it was with a sense of shock that I observed that the work was more vital, compelling, and physically and vocally engaged when they spoke in English. What were the factors at play here and what are the implications for future work？ Patsy Rodenburghas written of the giddy delight children find in language. Under what conditions does the native tongue evoke that ＂giddy delight＂ and where and when does it become an obstacle to such pleasure？

Flux Induced by Multiplicative Dichotomous Noise

The transport of particles induced by multiplicative dichotomous noise for a system is investigated. The stationary probability current is derived. It is shown that, for the system studied by us, the spatial asymmetry is the ingredient for the nonzero stationary current.

Numerical Investigation of Particle Temperature Change in Supersonic Flows

Gas-particle two-phase flow is a very important consideration in designing various machines. Although a great deal of theoretical, experimental, and numerical research has been carried out, particle motion in a supersonic flow has not been sufficiently clarified. Hence, in order to clarify the interactions between flow and particles, the authors consider the characteristics of particle motion, especially at high temperatures. In the present study, the flow of a gas with a diluted particle load is to be simulated in a conventional converging-diverging supersonic nozzle. The turbulent gas flow in the nozzle is computed with the finite difference and RANS （raynolds averaged navier-stokes simulation） methods. The particle motion is simulated in a Lagrangian manner. In addition, taking into account the light particle loading, a weak coupling method is used. Through this investigation, it is shown that the particle velocity increases monotonically from the nozzle throat to the outlet. And it is shown that particles can be accelerated to higher velocities in helium than in nitrogen, and smaller particles tend to attain higher speed and lower static temperature.

也曾心动──校园民谣的感触

也曾心动──校园民谣的感触文／李鸣镝，傅智山也许是性格的关系，在这个躁动的世界里仍没有学会追逐什么新潮。偶一黄昏翻起一本流行歌曲杂志，看到一首《同桌的你》。下面附了两行小字：此歌已在北京各大专院校传唱。估计很快会在社会上流行。”细看内容，“明天你是否...

The measurement error analysis when a pitot probe is used in supersonic air flow

Pitot probes enable a simple and convenient way of measuring mean velocity in air flow. The contrastive numerical simulation between free supersonic airflow and pitot tube at different positions in supersonic air flow was performed using Navier-Stokes equations, the ENN scheme with time-dependent boundary conditions （TDBC） and the Spalart-Allmaras turbulence model. The physical experimental results including pitot pressure and shadowgraph are also presented. Numerical results coincide with the experimental data. The flow characteristics of the pitot probe on the supersonic flow structure show that the measure- ment gives actually the total pressure behind the detached shock wave by using the pitot probe to measure the total pressure. The measurement result of the distribution of the total pressure can still represent the real free jet flow. The similar features of the intersection and reflection of shock waves can be identified. The difference between the measurement results and the actual ones is smaller than 10%. When the pitot probe is used to measure the region of L=0-4D, the measurement is smaller than the real one due to the increase of the shock wave strength. The difference becomes larger where the waves intersect. If the pitot probe is put at L=SD-10D, where the flow changes from supersonic to subsonic, the addition of the pitot probe turns the original supersonic flow region subsonic and causes bigger measurement errors.

Effects of the injector geometry on a sonic jet into a supersonic crossflow

Large-eddy simulation of a sonic injection from circular and elliptic injectors into a supersonic crossflow has been performed.The effects of injector geometry on various fundamental mechanisms dictating the intricate flow phenomena including shock/jet interaction,jet shear layer vortices and their evolution,jet penetration properties and the relevant turbulence behaviors have been studied systematically.As a jet issuing transversely into a supersonic crossflow,salient three-dimensional shock and vortical structures,such as bow,separation and barrel shocks,Mach disk,horseshoe vortex,jet shear layer vortices and vortex pairs,are induced.The shock structures exhibit considerable deformations in the circular injection,while their fluctuation becomes smaller in the elliptic injection.The jet shear layer vortices are generated at the jet periphery and their evolution characteristics are analyzed through tracing the centroid of these coherent structures.It is found that the jet from the elliptic injector spreads rapidly in the spanwise direction but suffers a reduction in the transverse penetration compared to the circular injection case.The turbulent fluctuations are amplified because of the jet/crossflow interaction.The vertical Reynolds normal stress is enhanced in the downstream of the jet because of the upwash velocity induced by the counter-rotating vortex pair.

Lateral variation in seismic velocities and rheology beneath the Qinling-Dabie orogen

The Qinling-Dabie orogen is an important tectonic belt that trends east-west and divides continental China into northern and southern parts.Due to its strong deformation,complicated structure,multiphase structural superposition and the massive exposed high and ultrahigh metamorphic rocks,its tectonic formation and geodynamical evolution are hot research topics worldwide.Previous studies mainly focused on the regional geological or geochemical aspects,whereas the geophysical constraints are few and isolated,in particular on the orogenic scale.Here,we integrate the available P- and S-wave seismic and seismicity data,and construct the rheological structures along the Qinling-Dabie orogen.The results demonstrate that:(1)there are strong lateral variations in the crustal velocity between the western and eastern sections of the Qinling-Dabie orogen,indicating the different origin and tectonic evolution between these two parts;(2) the lateral variations are also manifested in the rheological structure.The rigid blocks,such as South China and Ordos basin(North China Craton),resist deformation and show low seismicity.The weak regions,such as the margin of Tibet and western Qinling-Dabie experience strong deformation and accumulated stress,thus show active seismicity;(3) in the lower crust of most of the HP/UHP terranes the values of P-wave velocity are higher than the global average ones;finally(4) low P- and S-wave velocities and low strength in the lower crust and lithospheric mantle beneath Dabie indicate lithospheric delamination,and/or high temperature,and partial melting condition.

DNS of a spatially evolving hypersonic turbulent boundary layer at Mach 8

This paper reports the direct numerical simulation (DNS) for hypersonic turbulent boundary layer over a flat-plate at Ma∞ =8 with the ratio of wall-to-freestream temperature equal to 1.9, which indicates an extremely cold wall condition. It is primarily used to assess the wall temperature effects on the mean velocity profile, Walz equation, turbulent intensity, strong Reynolds analogy (SRA), and compressibility. The present high Mach number with cold wall condition induces strong compressibility effects. As a result, the Morkovin's hypothesis is not fully valid and so the classical SRA is also not fully consistent. However, some modified SRA is still valid at the far-wall region. It is also verified that the semi-local wall coordinate y* is better than conventional y+ in analysis of statistics features in turbulent boundary layer (TBL) in hypersonic flow.

Effect of Boundary Layer Trip on Reduction of Jet Noise in Over-Expanded Nozzle Flow

A flow resonance accompanied by the emission of acoustic tones occurs in an over-expanded convergent-divergent(C-D) nozzle when operated at comparatively low pressure ratios. This phenomenon is distinguished from conventional screech tones and is referred to as "transonic tones". In contrast to screech tones, the peak resonant frequency for transonic tones increases with pressure ratio; the peak sound pressure level exceeds 110 d B. In this study, we investigated the basic characteristics of transonic resonance and tones using a circular C-D nozzle in an anechoic room. The effects of the boundary layer trip were also evaluated using a tripping wire for the suppressing transonic resonance and tones. The results of acoustic measurements show that several predominant peaks correspond to transonic tones. However, the boundary layer trip inside the nozzle effectively eliminated these tones and suppressed the unsteadiness of the flow inside the nozzle.

Ignition, flame propagation and extinction in the supersonic mixing layer flow

The supersonic mixing layer flow,consisting of a relatively cold,slow diluted hydrogen stream and a hot,faster air stream,is numerically simulated with detailed transport properties and chemical reaction mechanisms.The evolution of the combustion process in the supersonic reacting mixing layer is observed and unsteady phenomena of ignition,flame propagation and extinction are successfully captured.The ignition usually takes place at the air stream side of braid regions between two vortexes due to much higher temperature of premixed gases.After ignition,the flame propagates towards two vortexes respectively located on the upstream and downstream of the ignition position.The apparent flame speed is 1569.97 m/s,which is much higher than the laminar flame speed,resulting from the effects of expansion,turbulence,vortex stretching and consecutive ignition.After the flame arrives at the former vortex,the flame propagates along the outer region of the vortex in two branches.Then the upper flame branch close to fuel streamside distinguishes gradually due to too fuel-riched premixed mixtures in the front of the flame and the strong cooling effect of the adjacent cool fuel flow,while the lower flame branch continues to propagate in the vortex.

The Two-Dimensional Supersonic Flow and Mixing with a Perpendicular Injection in a Scramjet Combustor

A numerical investigation has been performed on supersonic mixing of hydrogen with air in a Scramjet (Supersonic Combustion Ramjet) combustor and its flame holding capability by solving Two-Dimensional full Navier-Stokes equations. The main flow is air entering through a finite width of inlet and gaseous hydrogen is injected perpendicularly from the side wall. An explicit Harten-Yee Non-MUSCL Modified-flux-type TVD scheme has been used to solve the system of equations, and a zero-equation algebraic turbulence model to calculate the eddy viscosity coefficient. In this study the enhancement of mixing and good flame holding capability of a supersonic combustor have been investigated by varying the distance of injector position from left boundary keeping constant the backward-facing step height and other calculation parameters. The results show that the configuration for small distance of injector position has high mixing efficiency but the upstream recirculation can not evolved properly which is an important factor for flame holding capability. On the other hand, the configuration for very long distance has lower mixing efficiency due to lower gradient of hydrogen mass concentration on the top of injector caused by the expansion of side jet in both upstream and downstream of injector. For moderate distance of injector position, large and elongated upstream recirculation can evolve which might be activated as a good flame holder.