A note on nonlinear regression for the autoregressive moving average with non-hd errors

Estimation by nonlinear regression of the parameters for the stationary and invertible autoregressive moving average (ARMA) model with mixing or martingale difference errors is considered. Simple proofs of consistency and asymptotic normality for the nonlinear least squares estimator are given by exploiting results from nonlinear estimation theory and mixing and mixingale theory.     

Bivariate log Birnbaum–Saunders distribution

Univariate Birnbaum–Saunders distribution has received a considerable amount of attention in recent years. Rieck and Nedelman (A log-linear model for the Birnbaum–Saunders distribution. Technometrics, 1991;33:51–60) introduced a log Birnbaum–Saunders distribution. The main aim of this paper is to introduce bivariate log Birnbaum–Saunders distribution. The proposed model is symmetric and it has five parameters. It can be obtained using Gaussian copula. Different properties can be obtained using copula structure. It is observed that the maximum likelihood estimators (MLEs) cannot be obtained explicitly. Two-dimensional profile likelihood approach may be adopted to compute the MLEs. We propose some alternative estimators also, which can be obtained quite conveniently. The analysis of one data set is performed for illustrative purposes. Finally, it is observed that this model can be used as a bivariate log-linear model, and its multivariate generalization is also quite straight forward.     

Technological socialities: The impact of information and communication technologies on belonging among deaf and hard-of-hearing people

This review article examines how different types of communication technologies, from the specialized medical to generic social devices, influence belonging and sociality among deaf and hard-of-hearing (DHH) people. The emphasis is on DHH adolescents and young adults who may be impacted differently across countries, given state-specific policies regarding the status of sign language and deaf education, and based on different availability, affordability, and accessibility of communication technologies. We introduce different perspectives on deafness, ranging from pathological to cultural, a heuristic on which we build to explore DHH socialities as complex and evolving. We then analytically review ethnographic research on how cochlear implants impact DHH people's belonging to the “deaf world” and/or the “hearing world,” and how they navigate between these worlds. Then we move on to technologies such as text messages and social media, which enable DHH people to extend their socialities beyond local communities. Belonging is a fluid phenomenon, and technologies which are in a constant process of innovation and development may influence it in complex ways. We argue that to explore questions of belonging, identity, and sociality among DHH people, and how they are shaped by technologies, (visual) ethnographic methods are particularly productive.     

学前儿童基于重量和声音进行因果推理的发展研究

儿童的推理能力历来都是考察儿童认知发展的重点。本研究探讨了在多种属性刺激下3~5岁儿童基于重量和声音进行 因果推理的表现。结果发现：4岁和5岁儿童选择正确目标物的准确率显著高于3岁儿童；和同时使用声音与重量判断目标物相 比，儿童在单独使用重量或声音的情况下更容易区分目标物。总之，儿童因果推理能力发展的关键期在4岁并且当任务难度较高 的情况下其因果机制极易受到干扰。     

近三十年藏戏研究的发展脉络与趋势——基于计量可视化分析

藏戏被誉为藏文化“活化石”,分别于2006年和2009年被列入国家和世界非物质文化遗产目录。近年来,随着国家大力提倡非物质文化遗产保护和优秀中华文化“走出去”,藏戏研究也日益成为学界关注热点。为了厘清藏戏研究现状,研究热点与趋势,本研究通过CiteSpace与VOSviewer两个主流计量可视化分析软件对国内近三十年藏戏研究成果进行较为详尽的分析,以期为进一步推动藏戏创新研究提供基础数据支撑。直观的可视化分析结果表明：目前藏戏研究处于缓慢发展阶段,但研究内容逐渐向多元化、跨学科方向发展。藏戏研究的核心作者和机构较少,且合作关系不明显。如何服务公共文化体系和非物质文化遗产的传承是目前藏戏研究最新主题。藏戏内涵的丰富性,未来势必会吸引更多学科专家从不同视角对藏戏的传承和保护进行研究。     

建筑色彩视觉造型理论及其应用

建筑色彩视觉造型理论是建筑色彩设计的重要指导理论。在建筑色彩设计中,首先就必须运用建筑色彩视觉造型理论处理好建筑色彩视觉造型与建筑视觉造型、环境和人之间的关系;此外,在建筑色彩设计中还必须处理好整体与个体的关系:第一是把握基调,注意整体性;而后是在个体或局部发挥个性,在统一中寻求变化之美。     

试论契诃夫小说的叙事艺术

契诃夫是俄罗斯文坛的一颗巨星，他的作品聚焦“小人物”们平淡的故事。本文旨在对其作品从叙述学的角度进行研究，从巧选叙述视角、故留叙述空白、活用叙述层次三个方面分析其叙事艺术。     

SrBPO5:Ce3 的光谱特性

运用高温固相法,在空气中合成了SrBPO5:Ce3 荧光体,通过研究SrBPO5:Ce3 的光谱特性,发现激发光谱随Ce3 的掺入量增加而红移,据此认为Ce3 在进入格位时有两种电荷补偿方式,发射光谱则随Ce3 的掺入量增加而增强.     

试论创意思维的视觉表述

运用视觉语言来表述思想,让信息的沟通清晰而顺畅,合理的运用创意思维并找到合适的切入点来提出问题,同时运用精彩的视觉表述方式来解决问题。     

视觉显著点与信息传达——谈版面组织的视觉层次

版面组织的视觉层次是视觉传达设计的重要内容。无论从视觉信息传递的必要性还是从应用的实效性来看，合理建构的视觉显著点都能为视觉版面带来良好的视觉指示效果，是构成版面视觉层次、促进视觉信息传递不可缺少的关键因素。视觉传达设计师应该进一步重视和深入研究视觉显著点，并在具体实践中充分发挥它的效用。