记忆、历史过程与应对--宁夏海原的个案研究

黄土高原一隅的海原,历史上遭遇过人口迁徙、大地震、生态恶化与经济贫困。人们在记忆这些事件时,包含了现实的意义与应对。记忆是历史,也是现实。记忆过去的现实意义在于,遇到现实问题时,民众会从记忆的历史感中获得力量和慰藉。     

基于深度学习LSTM神经网络的全球股票指数预测研究

作为深度学习技术的经典模型之一，长短期记忆（LSTM）神经网络在挖掘序列数据长期依赖关系中极具优势。基于深度神经网络优化技术，本文构造了一个深层LSTM神经网络并将其应用于全球30个股票指数三种不同期限的预测研究，结果发现：①LSTM神经网络具有很强的泛化能力，对全部指数不同期限的预测效果均很稳定；②LSTM神经网络具有优秀的预测精度，相比三种对照模型（SVR，MLP和ARIMA），其对全部指数的平均预测精度在不同期限上均有提升；③LSTM神经网络能够有效控制误差波动，其对全部指数的平均预测稳定度相比三种对照模型在不同期限上亦均有提高。鉴于LSTM神经网络在预测精度和稳定度两方面的优势，其未来在金融预测中将有广阔的应用前景。     

基于ARFIMA(p, d, q)过程的半参数估计量分布特征及其有偏性研究7737976300

 本文运用蒙特卡罗模拟的方法对小样本下长记忆性的三种半参数估计量的分布特征尤其是有偏性问题进行了深入分析,结果发现,当长记忆和短记忆同时存在时,在大多数情况下,各参数估计量仍然服从正态分布,因此在小样本下仍可以构造t统计量判别参数的显著性,但由于受到短期参数的影响,估计量的分布是有偏的,因此导致参数的估计和检验出现偏差。而当真实数据过程接近非平稳或过度差分时,半参数估计量的分布也会发生改变。     

Logarithmic and power transformations in the context of fractionally integrated processes

In this article we examine the effect that logarithmic and power transformations have on the order of integration in raw time series. For this purpose, we use a version of the tests of Robinson (1994) that permits us to test I ( d ) statistical models. The results, obtained via Monte Carlo, show that there is no effect in the degree of dependence of the series when this type of transformations are employed, resulting thus in useful mechanisms to be applied when a more plausible economic interpretation of the data is required.     

When “They” Become “Us”: The Effect of Time and Ingroup Identity on Perceptions of Gay and Lesbian Group Members

ABSTRACT

Prejudice change manipulations rarely produce the expected attitude change effects. Our research suggests that attitude change depends on time-dependent memory consolidation processes. This study tested the effects of group information and time on perceptions of gays and lesbians. Heterosexual participants (N = 90) were randomly assigned to a condition where their ingroup, or an outgroup, included gay and lesbian individuals. We measured participants’ gay and lesbian political attitudes and evaluations of the groups’ members at a short or long delay. Results showed no effect of our manipulations on political attitudes, F(1, 86) = 0.14, p = .72. Contrary to predictions, participants evaluated gay and lesbian ingroup members less positively at the long versus short delay, t(49) = 3.72, p = .0004, d = 1.01. Results suggest that members of stigmatized groups are perceived more negatively when associated with one’s ingroup.     

傣族贝叶典籍:世界珍贵的记忆遗产

傣族贝叶典籍历史悠久、卷帙浩繁,是傣族传统文化的百科全书。深入分析傣族贝叶典籍的分类、特征和价值,可以发现它是一份珍贵的世界遗产,可作为"世界记忆遗产"进行申报。     

北五味子醇提物对记忆获得障碍模型小鼠记忆能力的影响

目的探讨北五味子醇提物(SCE)对东莨菪碱致小鼠记忆获得障碍的影响。方法将小鼠随机分为空白组、模型组、SCE组(低、中、高剂量组)和阳性药对照组(吡拉西坦),分别灌胃给药之后造模并进行跳台测试;应用分光光度法测定SCE对东莨菪碱所致记忆获得障碍模型小鼠血清和脑组织中乙酰胆碱脂酶(ACh E)活性的影响。结果 SCE组小鼠学习记忆成绩较模型组有显著提高;降低东莨菪碱所致记忆获得障碍模型小鼠血清和脑组织中乙酰胆碱脂酶(ACh E)的含量。结论 SCE对东莨菪碱造成的记忆获得障碍小鼠的学习记忆能力有明显的改善作用。     

雅斯贝尔斯与阿伦特:历史记忆和新的开端

第二次世界大战之后,纳粹时期的历史记忆促使卡尔.雅斯贝尔斯与汉娜.阿伦特一同告别旧欧洲传统,走向世界主义,成为世界公民。鉴于原子弹造成的新的世界现实,雅斯贝尔斯把创建世界哲学视为时代的必然任务,致力于一种以世界秩序和政治自由为目标的世界政治。对极权主义因素和起源的反思,促使阿伦特与旧的欧洲传统及其哲学概念决裂,倡导一种没有传统的概念,即一种没有扶手的思想,致力于基于开放性对话和交往的一种人道的、有人类尊严的新世界。     

Effects of emotional visuals and company–cause fit on memory of CSR information

This study explores the cognitive effects of emotional visuals and company–cause fit in CSR communication. We conducted a 2 (valence of visuals: positive vs. negative)?×?2 (company–cause fit: high vs. low) within-subjects experiment to examine the effects of valence and company–cause fit on participants’ memory of CSR information, measured by recognition sensitivity and cued recall of company information in CSR messages addressing three different CSR issues. Results showed that negative emotional visuals were more effective than positive emotional visuals. Company–cause fit also played a significant role, but its effect depended on the level of cognitive effects aimed for. We discuss the theoretical and practical implications.     

他撩起精神的伤口沉痛地边洗边说——读《随想录》中的怀人系列散文

巴金的《随想录》是一本沉甸甸的大书,单是其中的22篇怀人系列散文就使我们受益匪浅。作者怀什么人,如何处理先后详略,其中创作主体与怀念对象构成何种关系,无不显现出作者的内心情怀。