Between the City and Images:An Analysis of Mainstream Media’s Paths of Constructing the Cultural Memory of a City:Taking Chengdu Radio and Television’s“Hi Chengdu”as an Example

Mainstream media play a crucial role in constructing the cultural memory of a city.This study used 319 short videos released by“Hi Chengdu,”a new media product of Chengdu Radio and Television,as samples.Based on the grounded theory,a research framework encompassing“content,technology,and discourse”was established to explore the paths through which mainstream media construct the cultural memory.Regarding content,this paper emphasized temporal and spatial contexts and urban spaces,delving deep into the themes of the cultural memory and vehicles for it.In terms of technology,this paper discussed the practice of leveraging audio/visual-mode discourse to stitch together the impressions of a city and evoke emotional resonance to create a“flow”of memory.As for discourse,this paper looked at the performance of a communication ritual to frame concepts and shape urban identity.It is essential to break free from conventional thinking and leverage local culture as the primary driving force to further boost a city’s productivity,in order to excel in cultural communication.

Alternative kind of hydrogen atoms as a possible explanation for the latest puzzling observation of the 21 cm radio line from the early Universe

There is a puzzling astrophysical result concerning the latest observation of the absorption profile of the redshifted radio line 21 cm from the early Universe(as described in Bowman et al.). The amplitude of the profile was more than a factor of two greater than the largest predictions. This could mean that the primordial hydrogen gas was much cooler than expected. Some explanations in the literature suggested a possible cooling of baryons either by unspecified dark matter particles or by some exotic dark matter particles with a charge a million times smaller than the electron charge. Other explanations required an additional radio background. In the present paper, we entertain a possible different explanation for the above puzzling observational result: the explanation is based on the alternative kind of hydrogen atoms(AKHA),whose existence was previously demonstrated theoretically, as well as by the analysis of atomic experiments. Namely, the AKHA are expected to decouple from the cosmic microwave background(CMB) much earlier(in the course of the Universe expansion) than usual hydrogen atoms, so that the AKHA temperature is significantly lower than that of usual hydrogen atoms. This seems to lower the excitation(spin) temperature of the hyperfine doublet(responsible for the 21 cm line) sufficiently enough for explaining the above puzzling observational result. This possible explanation appears to be more specific and natural than the previous possible explanations. Further observational studies of the redshifted 21 cm radio line from the early Universe could help to verify which explanation is the most relevant.

A Millimeter-Wave Radio Telescope Project at Seoul National University

The Department of Astronomy at Seoul National University is carrying out a project to build a radio observatory, the Seoul Radio Astronomical Observatory (SRAO). The observatory will be constructed on our campus, which is located at sea level in Seoul, Korea, at (126°57.′3E, 37°27.′1N). The observatory will operate a 6 m millimeter radio telescope.

Data from Twenty-Three FRB’s Confirm the Universe Is Static and Not Expanding

Fast Radio Bursts from far away galaxies have travelled through the IGM and provide a tool to study its composition. Presently there are 23 FRB’s whose host galaxies have been identified and the redshift found. This gives us the opportunity to test Dispersion Measure versus redshift predictions made by two models. The Macquart relation for an expanding Universe and the New Tired Light relationship in a static universe. In New Tired Light, redshifts are produced when a photon is absorbed and re-emitted by the electrons in the IGM which recoil on both occasions. Some of the energy of the photon has been transferred to the kinetic energy of the recoiling electron. The photon has less energy, a lower frequency and a longer wavelength. It has been redshifted. Since dispersion is due to an interaction between radio signals and these same electrons one would expect a direct relationship between DM and redshift in the New Tired light model. The relation is DM=(mec/2hre)ln(1+z)and contains no adjustable parameters—just a combination of universal constants related to the electron and photon. Notice that the relation is independent of the electron number density ne since a change in ne affects both the DM and redshift equally. A graph of DM versus ln(1 + z) will be a straight line of gradient (mec/2hre)and, using SI units, substituting for the constants gives 7.318 × 1025 m−2. Using the data from the 23 well localized FRB’s, with the weighting of the DM’s for expansion removed (so that the data corresponds to a static universe), a graph of DM versus ln(1 + z) has a gradient of 6.7 × 1025 m−2—9% below the predicted (mec/2hre). The Macquart relation involves highly processed data and adjustable parameters to allow for “dark energy” and “dark matter” (neither of which has yet been found) and can be reduced to DM = 850z (in units of pc∙cm−3). Using the data from this set of localized FRB’s gives a trendline with gradient 1.10 × 103 pc∙cm−3—almost 30% higher than that predicted in an expanding universe model. The FRB data clearly comes down in favour of a static universe rather than an expanding one. Combining the DM-z relationship for the 23 well localized FRB’s, with the Hubble diagram, drawn using the NED-D compilation of redshift independent extragalactic distances, produces a value of “ne” the mean electron number density of the IGM, of ne=0.48 m−3close to the value ne=0.5 m−3, long since predicted by NTL.

Path loss modelling and comparison based on the radio propagation measurement at 3.5GHz

Wideband IMT-Advanced mobile communication systems tend to operate in the high frequency bands due to a relatively large capacity available. Thus, Measurement and modelling methods of radio propaga- tion eharaeteristics are proposed for the field test of Chinese 4th generation （4G） trial system. The mea- surement system is established for 3.5GHz based on the sophistieated measurement instruments and the virtual instrument teehnology. The characteristic parameters of radio propagation sueh as path loss （PL） exponent and shadow fading standard deviation are extracted from measurement data, which result in the path loss model finally. The comparisons with other existing international models results validate our mea- surement in terms of path loss model. Based on the analysis of the existing extension model assumed for the microwave frequency at 3.5GHz, we find that the Stanford University Interim （SUI） model fits very well with the measurement result in the hotspot scenario, while the COST 231 model is closer to the mea- surement result in the suburban scenario. This result provides a measurement-based channel referenee for the development of the future IMT-Advanced systems in China.

基于GNU Radio和USRP的未知信号检测技术研究

近两年,"黑广播"、伪基站等非法无线电信号,严重影响民航,诈骗人民财产安全。尽管无线电管理部门采取高压态势,但是技术更迭使这类设备愈加便宜和小型化,且可安装在高楼、大树等处,辐射远超国家标准,严重影响附近居民的身心健康。以最新的软无平台——USRP+GNU Radio为架构基础,设计并实现以自动探测未知信号的系统,采用能量检测算法,实现了其对大功率信号检测的良好效果。系统能获得未知信号的相关参数,而后续研究可通过多点共同协作,计算未知信号的距离和方位,以便及时消除隐患,捍卫无线电空域安全。

基于Helix Universal Server的网络电台的设计与实现

本文分析了网络电台的技术构成,从流媒体电台与电台网站两个方面分析整个网络电台的系统构成与设计,最后主要介绍基于Helix Universal Server的网络电台所用到的各种直播技术。

Mathematical Overview of Hypersphere World-Universe Model

The Hypersphere World-Universe Model (WUM) provides a mathematical framework that allows calculating the primary cosmological parameters of the World which are in good agreement with the most recent measurements and observations. WUM explains the experimental data accumulated in the field of Cosmology and Astroparticle Physics over the last decades: the age of the World and critical energy density;the gravitational parameter and Hubble’s parameter;temperatures of the cosmic microwave background radiation and the peak of the far-infrared background radiation;the concentration of intergalactic plasma and time delay of Fast Radio Bursts. Additionally, the model predicts masses of dark matter particles, photons, and neutrinos;proposes new types of particle interactions (Super Weak and Extremely Weak);shows inter-connectivity of primary cosmological parameters of the World. WUM proposes to introduce a new fundamental parameter Q in the CODATA internationally recommended values. This paper is the summary of the mathematical results obtained in [1]-[4].

5G网络与广播电视网络融合研究

5G网络具有超高速率、超低时延、高可靠性等显著优势,为广播电视提供了更好的内容传输质量。首先,分析5G网络的技术特点及关键技术框架,包括无线传输、终端直通(Device-to-Device,D2D)通信等,为广播电视网络融合的建设奠定了基础。其次,对比分析广播电视的有线、无线、互联网3种传输方式,并提出它们与5G网络的整合,实现传输的高效化和智能化。最后,提出5G移动与广播电视网络融合的总体框架,包括基础设施层、网络功能层、内容分发层等,并分析相应的核心技术。

广播电视发射塔桅杆段风致疲劳寿命研究

高耸结构主要承受变化的风荷载,发生疲劳破坏对结构性能的影响较大,而对于塔架结构来说,风荷载是否被定义为疲劳荷载一直存在争议。针对这一问题,本文以宁夏广播电视发射塔工程为例,对桅杆段进行风致疲劳损伤及疲劳寿命研究。工程设计时对整体结构及桅杆段分别进行了风洞试验,通过雨流计数法得到风荷载作用下桅杆段构件的应力幅值的概率密度分布,采用时域法分析其风致疲劳寿命。结果表明,桅杆段构件最大应力幅值均小于疲劳截止限,无需计算疲劳寿命;连接法兰螺栓的疲劳寿命在500年以上,满足钢结构设计标准的疲劳要求。

基于STC8H的USB接口RFID读卡器设计

设计了一种具有HID接口的RFID读卡器,该读卡器采用带硬件USB接口的STC8H单片机作为主控,采用多协议射频芯片FM1722作为读卡芯片,读卡器具有接口方便、读写速度快、性价比高、支持卡类型多等优点,可以用在物流、交通、身份识别、安全控制等领域。

Hypersphere World-Universe Model: Basic Ideas

Hypersphere World-Universe Model (WUM) envisions Matter carried from the Universe into the World from the fourth spatial dimension by Dark Matter Particles (DMPs). Luminous Matter is a byproduct of Dark Matter (DM) self-annihilation. WUM introduces Dark Epoch (spanning from the Beginning of the World for 0.45 billion years) and Luminous Epoch (ever since for 13.77 billion years). Big Bang discussed in Standard Cosmology (SC) is, in our view, transition from Dark Epoch to Luminous Epoch due to Rotational Fission of Overspinning DM Supercluster’s Cores and self-annihilation of DMPs. WUM solves a number of physical problems in SC and Astrophysics through DMPs and their interactions: Angular Momentum problem in birth and subsequent evolution of Galaxies and Extrasolar systems;Fermi Bubbles—two large structures in gamma-rays and X-rays above and below Galactic center;Coronal Heating problem in solar physics—temperature of Sun’s corona exceeding that of photosphere by millions of degrees;Cores of Sun and Earth rotating faster than their surfaces;Diversity of Gravitationally-Rounded objects in Solar system and their Internal Heating. Model makes predictions pertaining to Rest Energies of DMPs, proposes New Type of their Interactions. WUM reveals Inter-Connectivity of Primary Cosmological Parameters and calculates their values, which are in good agreement with the latest results of their measurements.

虚拟仿真技术在广播编导中的应用

虚拟仿真技术的应用丰富了广播电视编导领域的创作手段,提升了作品的视听体验和创作效率。阐述虚拟仿真技术的定义、基本原理和主要特点,分析了虚拟仿真技术的实现过程及其在广播电视编导领域的具体应用。

新媒体视域下的广播电视新闻采编技巧

新媒体的出现,给传统广播电视新闻行业带来巨大的冲击,传统新闻媒体与新式新闻媒体的竞争日趋白热化。这对新闻采编工作提出了更高的要求。基于此,分析部分广播电视新闻机构新闻采编工作开展状况,阐述新媒体对广播电视新闻采编的影响和新型新闻采编工作模式特点,提出一些采编工作优化策略,以推动新闻采编转型升级。

影视服务高校就业育人工作的模式构建与探索

影视是引导高校学生树立正确就业观的生动媒介。新媒体视域下,影视将理想信念、道德观念、价值理念、职业知识技能等以潜移默化的形式传达给高校学生,引导他们正确看待就业和职业发展,起到影视育人的作用。本文首先阐释了影视的概念定义,分析新媒体视域下,影视服务高校就业育人工作的重要意义,指出当前高校就业育人工作存在的问题,并对影视服务高校就业育人工作模式的创新路径进行探析,为高校就业育人工作提出切实有效的策略,促进高校就业育人工作的创新发展,构建全员参与、全方位推动、全要素协同的影视服务高校就业育人工作模式,以期对高校就业育人工作有所启发,开创高校就业育人工作新局面。

人工智能技术在广播电视的应用场景

探讨人工智能技术在广播电视领域的节目制作、媒资建设、传播、内容推荐与个性化体验等应用。通过智能编辑、语音图像识别、虚拟增强现实等技术,广播电视行业实现了更高效、精准的制作和创意实现。在媒资建设方面,人工智能提升了信息收集整理的效率。在传播中,智能审核和节目播出等应用提高了内容质量和监管水平。内容推荐和个性化体验的智能化应用为观众提供了更符合个性需求的观看体验。

卫星通信在广播电视领域的应用研究

以卫星通信在广播电视领域的应用为研究重点,首先全面介绍卫星通信相关理论知识,包括卫星通信的定义和特点、工作原理、不同类型等,其次重点分析卫星通信在广播电视领域的优势和挑战,最后深入探讨卫星通信在广播电视方面的具体应用,包括在4K/8K超高清节目传输、应急广播、新闻报道等领域的应用,并举例说明,以期为广播电视与卫星通信的深度融合提供参考。

人工智能技术在广播电视领域的应用

主要介绍人工智能技术的概念、创新发展及产业发展趋势,重点分析人工智能技术的深度合成、视频修复、智能剪辑、人工智能生成内容以及智能推荐等技术在广播电视领域的应用,并举实例进行说明,推动广播电视制播流程的智能化、自动化发展。

拓展现实演播室在广播电视领域的应用研究

以拓展现实(Extended Reality,XR)演播室在广播电视领域的应用为研究重点,首先全面介绍XR演播室的相关概念,然后重点分析XR演播室在广播电视领域的应用,包括在新闻节目、体育节目、综艺节目中的应用,以期提升电视节目的制作水平,为观众带来沉浸式的观看体验。