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1.
黄传球 《吉首大学学报(社会科学版)》2021,42(4):28-34
人类命运共同体构想作为马克思主义中国化的最新理论成果,是在积极反思人类生存现状的基础之上,对世界未来发展形态的一种前瞻性擘画。总体观之,作为“类”存在的人的主体自觉以及马克思主义“类”思想是人类命运共同体构想的逻辑基点, 现代“人类交往”方式的演进与普遍发展是人类命运共同体构想的现实基点,中国传统文化中的“和合”理念是人类命运共同体构想的思想源点。逻辑起点、现实基点与思想源点共同构成人类命运共同体构想的生成之源,对其系统、深入的阐释与审思则是我们学习、领悟、实践这一伟大构想的重要环节。 相似文献
2.
传统的分数阶灰色预测模型在时间序列预测中具有较好的适应性和预测的有效性,但其累加和差分计算式比较复杂。一致性分数阶累加相对于一般的分数阶累加,形式更简单,更便于计算和理论推导。为了提高模型的适应性和预测能力,文章在CFGM(1,1)白化方程中引入一个新的可变系数,扩大了原有白化方程的适用范围,并在此基础上构建了一致性分数阶优化灰色模型,即CFOGM(1,1)模型。最优一致性分数阶阶数和可变系数通过PSO算法最小化平均相对误差获得。将构建的模型运用到两个实例中并与其他经典的灰色预测模型进行对比,结果表明所提出的模型具有较高的拟合和预测精度。 相似文献
3.
Non-Gaussian spatial responses are usually modeled using spatial generalized linear mixed model with spatial random effects. The likelihood function of this model cannot usually be given in a closed form, thus the maximum likelihood approach is very challenging. There are numerical ways to maximize the likelihood function, such as Monte Carlo Expectation Maximization and Quadrature Pairwise Expectation Maximization algorithms. They can be applied but may in such cases be computationally very slow or even prohibitive. Gauss–Hermite quadrature approximation only suitable for low-dimensional latent variables and its accuracy depends on the number of quadrature points. Here, we propose a new approximate pairwise maximum likelihood method to the inference of the spatial generalized linear mixed model. This approximate method is fast and deterministic, using no sampling-based strategies. The performance of the proposed method is illustrated through two simulation examples and practical aspects are investigated through a case study on a rainfall data set. 相似文献
4.
This study advances our current understanding of corporate social responsibility (CSR) communication in a controversial industry by analyzing CSR-related Facebook posts from seven Canadian public cannabis companies. Our findings indicated that these companies’ CSR communication on Facebook was mostly instrumentalist, lacked transparency, and used effective multimedia characteristics. In addition, associations between communication strategies and public engagement on social media (e.g., # of likes, comments, and shares) revealed both opportunities and ethical concerns regarding CSR communication in controversial businesses. 相似文献
5.
乔钰茗 《沈阳工业大学学报(社会科学版)》2021,14(1):87-91
随着科技的发展和互联网的普及,我国文化的对外传播迎来了新局面,越来越多的新媒体被应用到文化传播中,自媒体作为其中最具代表性的传播方式,为我国文化对外传播带来利好的同时,也存在着一些不容忽视的问题。以自媒体“李子柒”为例,讨论如何善用自媒体做好中国文化的“走出去”,以期对中国文化对外传播有所助益。 相似文献
6.
运用传播学内容分析法,以中央媒体对获得"全国教书育人楷模"和"最美教师"荣誉称号的"国家教师"相关报道为研究对象,从外在和内在两个方面对大众传播的"国家教师"媒介形象进行分析。外在形象包括教师性别、年龄、教龄、外表、场景以及任教的学校类别、区域、学科专业等方面,内在形象包括职业精神、职业知识和职业能力等方面。研究发现,大众媒体对"国家教师"形象的刻画和宣传符合社会公众认知教师职业的基本逻辑,起到了传递教师精神、端正教师形象、唤起社会尊重教师的功效,但也存在城乡教师形象传播刻板化以及教师普通人形象展现不充分等问题,可在后续的传播中对"国家教师"形象的价值倾向进行适当调整。 相似文献
7.
Kevin YX Wang Garth Tarr Jean YH Yang Samuel Mueller 《Australian & New Zealand Journal of Statistics》2019,61(4):445-465
We present APproximated Exhaustive Search (APES), which enables fast and approximated exhaustive variable selection in Generalised Linear Models (GLMs). While exhaustive variable selection remains as the gold standard in many model selection contexts, traditional exhaustive variable selection suffers from computational feasibility issues. More precisely, there is often a high cost associated with computing maximum likelihood estimates (MLE) for all subsets of GLMs. Efficient algorithms for exhaustive searches exist for linear models, most notably the leaps‐and‐bound algorithm and, more recently, the mixed integer optimisation (MIO) algorithm. The APES method learns from observational weights in a generalised linear regression super‐model and reformulates the GLM problem as a linear regression problem. In this way, APES can approximate a true exhaustive search in the original GLM space. Where exhaustive variable selection is not computationally feasible, we propose a best‐subset search, which also closely approximates a true exhaustive search. APES is made available in both as a standalone R package as well as part of the already existing mplot package. 相似文献
8.
作为化外之地的古徽州,因北方长期战乱,引发北人多次南迁,中原世家大族有的徙居徽州,子孙繁衍,聚族而居,徽州也直接继承了中原文明。淮北在北人南下中起了桥梁和中转站的作用,当然也不乏北人留居淮北等。明初政府对淮北凤阳府实行大规模人口迁移政策,晚清太平天国战乱,江南人大量逃亡淮北等地区。这样,淮北成了外来人口杂居的社会。徽州社会长期相对安宁,经济富庶,文化昌荣,文化特色独树一帜。淮北在北宋及之前,虽有北人南下,但自然和人文环境总体尚好,文化名人也层出叠现,对中国文化影响深远。自黄河夺淮入海和金兵犯淮,淮北文化开始凋零荒芜;明初江浙文人的大批迁淮,又使得淮泗文化稍有复苏;至晚清文化持续凋零。 相似文献
9.
《Public Relations Review》2021,47(5):102105
In 2020, Twitter launched a new strategy dubbed ‘prebunking’ in hopes of pre-emptively countering false information about voting by mail and election results. Prebunking was touted as a potential solution; however, little empirical research has tested the strategy to examine its effectiveness towards disinformation in the realm of public relations. Exploring PR-based disinformation attacks as a paracrisis, the purpose of this online quasi-experimental design study (N = 965) was to investigate the effects of an attack and how prebunking strategies, grounded in inoculation theory, can protect organizational outcomes (i.e., reputation and credibility) by interweaving positive psychology. In addition to examining effects on attitudinal components, this study also inspected dimensions of social amplification to determine if prebunking messages can thwart the spread of disinformation via Facebook. Findings provide insight into advancing the conceptual framework of proactive disinformation responses for crisis communication by demonstrating the success of using prebunking with autonomy support and explicit details to thwart adverse effects of disinformation. 相似文献
10.
《European Management Journal》2022,40(5):707-717
The fast-changing scenario related to the COVID-19 pandemic calls for firms to rapidly redefine and innovate their strategies to sustain their businesses, with research emphasizing the key roles of digital technologies and servitization. We aim to enrich the theoretical debate on this matter by assessing how small and medium-sized enterprises (SMEs) achieve product innovation under time constraints by leveraging two specific technology groups (information and communication technologies [ICT] and Industry 4.0 data-processing technologies) and servitization. The research is based on a mixed-method approach consisting of an original survey completed by 257 Italian SMEs (grounded on a previous qualitative study about such SMEs' behaviors during the first Italian lockdown), followed by in-depth interviews with the owners and/or managers of the eight SMEs that participated in the survey. The results show a positive relationship between the increased use of digital technologies (ICT and Industry 4.0 data-processing technologies) during the pandemic with servitization and, in turn, with product innovation. Specifically, the increased use of ICT during the pandemic had a direct positive effect on product innovation, while Industry 4.0 data-processing technologies affected product innovation only through the full mediation of servitization. The qualitative study allowed us to highlight how the different kinds of digital technologies supported SMEs’ innovation (servitization and product innovation) during the pandemic. The theoretical and practical contributions of this study are discussed. 相似文献