Local Digital Algorithms Applied to Boolean Models

We investigate the estimation of specific intrinsic volumes of stationary Boolean models by local digital algorithms; that is, by weighted sums of local configuration counts. We show that asymptotically unbiased estimators for the specific surface area or integrated mean curvature do not exist if the dimension is at least two or three, respectively. For three‐dimensional stationary isotropic Boolean models, we derive asymptotically unbiased estimators for the specific surface area and integrated mean curvature. For a Boolean model with balls as grains, we even obtain an asymptotically unbiased estimator for the specific Euler characteristic.     

Masses,Crowds, Communities,Movements: Collective Action in the Internet Age

This article investigates two questions: One, how might the very differently structured social collectives on the Internet – masses, crowds, communities and movements – be classified and distinguished? And two, what influence do the technological infrastructures in which they operate have on their formation, structure, and activities? For this, we differentiate between two main types of social collectives: non-organized collectives, which exhibit loosely coupled collective behavior, and collective actors with a separate identity and strategic capability. Further, we examine the newness, or distinctive traits, of online-based collectives, which we identify as being the strong and hitherto non-existent interplay between the technological infrastructures that these collectives are embedded in and the social processes of coordination and institutionalization they must engage in, in order to maintain their viability over time. Conventional patterns of social dynamics in the development and stabilization of collective action are now systematically intertwined with technology-induced processes of structuration.     

Mapping the two levels of digital divide: Internet access and social network site adoption among older adults in the USA

Older adults have increasingly adopted Internet and social network sites (SNSs), but little communication scholarship has explored systematic differences in access within this population. Using a nationally representative sample of Americans over the age of 50 years from the 2012 Health and Retirement Study, we examine Internet access (N?=?18,851) and SNS adoption patterns (N?=?869) among this sample and explore how these patterns vary by age. Regarding Internet access, results suggest that while the gender divide has reversed in favor of women, older adults who are economically, socioculturally, or physically disadvantaged are less likely to have reliable Internet access. In addition, the view that the various divides in Internet access are less of a concern for those who are younger is only partially supported, as some access-related divides do not vary by age or even decrease with age. For SNS adoption, we found that access to technological resources (diversity of online activities) positively predicts SNS use. Moreover, SNS users are more likely to be younger, female, widowed, and homemakers, perhaps because these individuals are more motivated to use SNSs to complement or compensate for their existing social status. These findings reveal unique challenges and motivations in relation to Internet access and SNS adoption patterns across the later life span.     

Digital skills and social media use: how Internet skills are related to different types of Facebook use among ‘digital natives’

Based on the idea that Internet use can be conceptualized in terms of depth (frequency) and width (differentiated) uses of the Web, this study explored how socio-demographic factors and digital skills are related to frequency and types of Facebook use among young adults. It used a face-to-face representative survey conducted in the three main urban areas of Chile among a sample of 18-to 29-year olds. The results found that men and more educated young people had higher levels of skills, confirming that the so-called ‘digital natives’ are not a monolithic group. They also revealed that digital skills did not predict frequency of Facebook use. Furthermore, lower educated young people tended to use Facebook more frequently. Although these results go against the long-established digital divide research, traditional digital gaps emerged when types of use were analyzed. While more educated and skillful individuals tended to use Facebook for informational and mobilizing purposes, socio-demographic factors and skills did not make a difference in Facebook use for social purposes.     

数字治理的发展逻辑解析

信息化是推动政府转变治理方式的核心力量。我国政务信息化经历了电子政务、数字政府、数据治理以及数字治理等阶段的发展。目前,数字治理是我国政府推进社会治理的核心模式。基于数字治理的发展脉络及其基本内涵,当前的数字治理主要涵盖三种核心任务与发展逻辑,即“互联网+政务”“大数据治理”和“大数据决策”。结合上海市“一网通办”与“一网统管”实践,“互联网+政务”又可以分为“互联网+政务服务”与“互联网+城市治理”两个方面。这些核心任务中,“互联网+政务”强调服务导向、多元协作、数据处理与平台共享,“大数据决策”关注整合数据的科学价值与决策依据;二者联系的纽带为“大数据治理”,且分别驱动不同的大数据治理模式。尽管目前我国大数据治理仍然面临许多问题,但数字化已经广泛应用于城市治理与公共服务等各个领域。在未来,数字治理将逐步向“智慧治理”或“智能治理”转型。     

数字经济对地方财政可持续性的影响研究：基于“本地—邻地”视角

地方财政可持续是我国应对相互交织的结构性、体制性、周期性社会经济问题的财政基础。数字经济的蓬勃兴起改变了财政收入组织方式、财政支出使用效率及财政治理效能,为实现地方财政可持续发展带来了机遇与挑战。本文首先构建了我国地方财政可持续性的评价指标体系,并利用Dagum基尼系数测算我国地方财政可持续性的区域差异,接着基于“本地-邻地”视角,考察了数字经济与地方财政可持续性之间的关系。结果表明：数字经济发展显著促进了本地的地方财政可持续性提升;数字经济的发展对邻地的地方财政可持续发展有负向影响,存在“虹吸效应”和“洼地效应”;东部地区数字经济的财政效应更明显;进一步分析发现数字经济对地方财政可持续性的影响存在基于创业活跃度和财政透明度的门槛效应。     

考虑偏轴角影响的2.5D机织复合材料冲击后压缩性能

通过调研“广东百万农民线上免费培训工程”项目,对贫困地区的参与农户、企业、专业合作组织和地方政府官员进行访谈,运用案例研究方法,分析数字技能提升对贫困群体生计抗逆力乃至可持续生计能力的影响机制。结果表明：数字技能的提升能增强贫困群体信息获取能力、拓展市场途径、拓宽资金获取渠道、提高农产品价值、增加就业和创业等,进而增强其生计抗逆力;贫困群体的数字技能持续发展升级会形成数字能力,进而从资源整合能力、风险控制能力、环境适应能力以及生计创新能力几个方面提高其可持续生计能力。     

“双循环”背景下我国“一带一路”企业供应链合作生态系统研究

在我国“双循环”发展新格局下,中国企业参与“一带一路”合作不仅要与联合国《2030年可持续发展议程》接轨,还要打造新的全球化“双循环”枢纽节点。面对中美贸易战的升级和后疫情时代的新形势,“一带一路”倡议下的企业需要采用新的国际化理念,提升生态位,适应新的发展格局,转变发展理念,优化国际与国内供应链的生态系统,保证供应链的安全、稳定、可控,实现可持续发展。“双循环”发展新格局下,“一带一路”可持续发展的关键是建立国际与国内双循环的枢纽机制,从“人类命运共同体”的理念出发,创新制度化“共生”发展模式。研究企业生态位优化算法是分析“双循环”供应链合作生态系统有效性的方法,针对目前“一带一路”企业供应链合作存在的“孤岛”问题与不足,对企业生态位的重叠度和宽度进行算法优化。通过算法优化与验证,创新国际“双循环”供应链合作新模式,适应国际国内变化新形势,建设“一带一路”供应链的“双循环”生态系统,以对接联合国可持续发展目标,发挥国际国内大循环产业的枢纽节点作用,提升“一带一路”我国产业生态位和企业生态位,从而推动我国“一带一路”产业“双循环”供应链合作生态系统的新发展,形成“一带一路”发展新格局。     

数智时代的民歌传承与传播———以四川凉山彝族民歌为例

自由灵动的民歌传承与传播,从原有的口口相传和少许文本记录的状态,发展到数智化时代的今天,民歌传承的方 法、途径在不断改变。 音频、视频的保存便捷了民歌的传播与传承,文本是民歌记录的重要补充手段。 民歌的时代价值却一 直未变,并有新的拓展,体现为教育与文化传承、历史和时代创造、地域文化创造使命     

数字经济背景下的算力网络研究

算力网络(CFN,Computing First Networking)是随着以云计算为代表的传统中心化算力资源下沉到边缘计算的分布式新型算力资源解决方案,是现代数字化社会的发展基础和数字经济时代推动经济高质量发展的新引擎。当前,面向用户服务的传统算力网络在大数据时代,协同计算效率低下的劣势日益明显,算力网络亟需转型革新。在分析传统算力网络基础上,进一步探讨分布式形态下算力网络的可研究和落地方向。研究认为:在分布式架构算力网络下引入区块链、边缘计算等技术可以为智慧地球应用提供数字动力;融合区块链技术的分布式云计算底层操作系统,能够让更多有资源优势和运营能力的单位都有机会基于此算力架构更好实现商业落地;分布式算力网络有望成为未来十年最值得期待的信息基础设施变革之一。