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.

Reconfigurable Intelligent Surface-Based Hybrid Phase and Code Modulation for Symbiotic Radio

Reconfigurable intelligent surface(RIS)-assisted symbiotic radio is a spectrum-and energy-efficient communication paradigm,in which an RIS performs passive beamforming to enhance active transmission,while using the electromagnetic waves from the active transmission for additional information transfer(i.e.,passive transmission).In this paper,a hybrid RIS-based modulation,termed hybrid phase and code modulation(HPCM),is proposed to improve the reliability of RIS-assisted symbiotic radio.In RIS-HPCM,the RIS simultaneously performs direct sequence spread spectrum and passive beamforming on incident signals.Moreover,both the spreading code and phase offset are exploited to carry the RIS’s own information.A low-complexity detector is designed,in which the receiver first detects the spreading codes and then demodulates the constellation symbols.We analyze the bit error rate(BER)performance of RIS-HPCM over Rician fading channels.BER upper bounds and approximate BER expressions are derived in closed-form for maximum-likelihood and low-complexity detectors,respectively.Simulation results in terms of BER verify the analysis and show the superiority of RIS-HPCM over the existing RIS-based modulation.

Direction of Arrivals Estimation for Correlated Broadband Radio Signals by MVDR Algorithm Using Wavelet

A theoretical relationship between the wavelet transform and the fast fourier transformation(FFT) methods in broadband wireless signal is proposed for solving the direction of arrivals(DOAs) estimation problem. This leads naturally to the derivation of minimum variance distortionless response(MVDR) algorithm, which combines the benefits of subspace methods with those of wavelet, and spatially smoothed versions are utilized which exhibits good performance against correlated signals. We test the method's performance by simulating and comparing the performance of proposed algorithm, FFT MVDR and MVDR with correlated signals, and an improved performance is obtained.

Research on the Development Direction of Traditional Broadcast Television Movie Media under Background of New Media and Internet

In this paper, we conduct research on the development direction of traditional broadcast television movie media under background of new media and lnternet. In recent years, with the computer technology network communication technology and constant innovation rapid development of digital technology, digital new media got rapid development. Under the digital new media industry has gradually become the core industry of 21 st century knowledge economy and the new economic growth point. But there are still some problems in the digital of new media development. How to treat these problems to take effective countermeasures is vital to healthy development of the new media. Our research proposes corresponding guidance and the perspective on the development orientation which acts as the paradigm and the guideline.

Design of an Efficient Cooperative Spectrum for Intra-Hospital Cognitive Radio Network

This paper presents a new low delay centralized cooperative spectrum sensing method based on dynamic voting rule using multiple threshold level,for indoor hospital environment,where fading and direct path loss both are together responsible for variation in signal strength.In the proposed algorithm,weights of Cognitive Radios(CRs)in terms of assigned votecount are estimated based on the sensed energy values with respect to multiple fixed threshold levels,so that the direct path loss can be dealt without further increasing the error,which occurs due to fading.For indoor hospital like environment,Rician fading model is more appropriate.Therefore,formulation,evaluation and analysis of various sensing performance parameters have been carried out considering Rician fading model.Comparative analysis and tradeoff among three optimum parameters-energy threshold,total number of CRs participating in sensing and total error rate,are presented with respect to signal to noise ratio(SNR).Finally,the Monte Carlo simulation is designed and implemented considering the two conditions-only fading environment and fading along with direct path loss environment.It can be observed that in both cases,the proposed spectrum sensing rule outperforms the other contemporary rules.

Spectrum allocation game of directional transmission in multi-hop cognitive radio networks

The spectrum allocation for links in multi-hop cognitive radio networks is addressed.The links rent the vacant licensed bands offered by primary users for implementing directional transmission.To minimize the individual cost,the links share the licensed band and rental fee.An interference model for the directional transmission in cognitive radio networks is proposed to formulate the cooperative and dynamic behavior of the links using the theory of hedonic game,called spectrum allocation game.The game is proved to converge to the core stable state indicating that all links satisfy with their current conditions and do not deviate from their coalitions.Numerical results show that the game improves spectral efficiency and contributes to reducing the individual cost of the links.

Radio Direction Finding Method to Mitigate Tsunami Risk in Sierra Leone

In this study,the Radio Direction Finding method is proposed for the detection of electromagnetic signals,in the VLF band,to try to anticipate the occurrence of potentially destructive geophysical events.The experimentation concerns the interception of electromagnetic anomalies in Sierra Leone,in the five-day time window,associated with seismic events that could potentially generate tsunamis.The area of investigation is Sierra Leone,whose coastline is subjected to tidal wave hazards triggered by earthquakes generated in the Mid-Atlantic Ridge.Although Sierra Leone is not affected by recurrent earthquakes,there is nevertheless a low probability,estimated at 2 percent,of the occurrence of destructive earthquakes in the next 50 years.Also in estimates,the risk of rogue and potentially damaging waves is estimated to strike the Sierra Leone coast at least once in the next 10 years.The Radio Direction Finding experiment carried out continuously 24/7,has shown a close relationship between increased radio-anomalies,in the frequencies of 6,000 Hz,a time window between electromagnetic anomaly detection and the imminence of an earthquake,and higher frequency times for the risk of earthquake occurrence in the Mid-Atlantic Ridge.

浅析美国高功率微波效应研究动态

简要介绍了美国国际高级研究计划局(DARPA)发布的“波形捷变射频定向能(WARDEN)”项目、空军研究实验室公布的《定向能和基地防御》和《定向能未来2060-美国国防部定向能技术未来40年远景》报告,重点分析了“WARDEN”项目、《定向能和基地防御》和《定向能未来2060-美国国防部定向能技术未来40年远景》报告中的高功率微波效应研究动态,分析归纳了当前美国高功率微波效应研究进展和研究重点是“深化无人机和巡航导弹高功率微波后门扰乱效应机理,提升高功率微波武器系统对无人机和巡航导弹的攻击距离”,这些结论可为我国高功率微波效应研究提供重要参考。

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。

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。

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。

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。

混合现实技术在广播电视行业的应用

介绍混合现实(Mixed Reality,MR)的概念、成像技术、组成要素及技术优势等,重点分析MR技术在广播电视行业的应用,包括在新闻节目、综艺节目、体育节目及气象节目中的具体应用,并举实例进行说明,为MR技术在广播电视行业的应用提供参考,推动广播电视行业的创新发展。

人工智能在广播电视内容监测中的应用探讨

随着人工智能技术的飞速发展,其在广播电视内容监测与识别领域的应用日益广泛。探讨人工智能技术在广播电视内容自动化监测、智能识别与分类以及内容安全与合规性检测等方面的应用现状、面临的挑战及未来发展趋势,以期为相关领域的研究与实践提供参考。

AI技术在广播电视和网络视听领域的应用研究

以人工智能(Artificial Intelligence,AI)技术在广播电视和网络视听领域的应用为重点,首先全面介绍人工智能的概念、演进方向、产业发展现状,其次重点分析AI技术在广播电视和网络视听领域的应用情况,包括智能内容审核、智能效果评估、智能推荐、智能剪辑等技术与系统在广播电视和网络视听领域的具体应用,推动广播电视和网络视听行业向智能化、自动化、智慧化方向发展。

融媒体时代的广播电视信号覆盖增强技术与应用

探讨融媒体时代背景下广播电视信号覆盖技术的现状与挑战,重点分析信号调制、编码解码、多入多出(Multiple Input Multiple Output,MIMO)及智能天线等覆盖增强技术的最新研究与应用。针对现有问题,提出加强技术研发、制定技术标准以及推动产业化与市场应用等发展策略。通过技术创新和市场应用,提升广播电视信号的传输效率和覆盖范围,以满足日益增长的公众信息需求和服务质量。

深度合成技术在广播电视领域的应用

介绍深度合成技术相关内容,包括人工智能技术的概念、深度合成技术的概念、深度合成技术的技术机理以及深度合成技术的应用场景等,分析深度合成技术在广播电视领域的应用,包括在体育节目、综艺节目、新闻节目等的应用,并实际应用案例进行说明,为深度合成技术与广播电视的融合应用提供参考。

一种整数抽取结合小数插值重采样技术研究

射频直采技术近年来在雷达、通信、电子对抗尤其是一体化接收等领域得到了广泛的应用。然而射频采样数据率极高,导致后续信号传输与实时处理难度变大。数字重采样技术能够在数字域降低采样率,从而减轻射频直采带来的信号处理压力。本文针对数字重采样技术开展研究,提出一种整数抽取结合小数插值重采样方法,推导了理论模型,给出了相应的参数递推解算方法,仿真验证了方法的有效性。采用本文所提方法,既可解决在射频高采样率下,直接进行小数插值带来的数字信号实时处理压力,又可在保证信号质量的情况下,解决特殊场景下精确变采样率处理的需求,进而实现对大范围任意分数倍抽取。