Multivariate prediction of academic performance by Hong Kong University students

Verbal intelligence, English-language skills, personality, and attitude scales were used as predictors of academic performance in 230 male and female arts students at the University of Hong Kong. A series of bivariate, multiple, and canonical correlation analyses were performed. The results showed that verbal intelligence and attitudes, excepting study orientation, were not predictive of performance. English-language skills had the most predictive value, accounting for about 10% of the variance of performance measures. Personality variables failed to predict performance when composite criterion measures (GPAs) were used; however, they proved to be of predictive value when results of individual academic subjects were used as criterion measures. The study points to the importance of using noncomposite criterion measures in prediction and of considering the cultural context of achievement.     

基于STM32F0xx的智能温湿度控制器的设计

介绍了一种基于STM32F0xx的智能温湿度控制器的设计方法及功能实现;该控制器可实现控制柜内温湿度控制和控制柜内外温湿度显示。     

以语音识别为基础的音乐检索系统

针对一般的语音识别算法均存在抗噪能力不好的问题,无法满足音乐检索系统的需求。针对于此,本文以抗噪能力为基础对MFCC语音识别算法进行了优化,第一步是通过F比方法加权优化了MFCC算法的特征参数,估计出各维特征分量对识别率的影响,并将其提取出来,然后采用主成分分析法对提取的特征分量进行降维处理,以降低计算复杂度,减少数据存储量,加快训练时间,最终提高识别效率。算法仿真结果表明,本文提出的基于抗噪能力优化的MFCC语音识别算法具有较好的抗噪能力,比传统MFCC算法对音乐检索的精确度更高。     

锦屏一级水电站坝基f2断层水泥灌浆施工技术

断层及层间挤压错动带采用高压水冲洗置换灌浆的方式进行处理,能够冲洗出一部分软弱介质,冲洗后的空腔再采用水泥浆液进行置换固结灌浆,相当于在断层上施加了水泥柱桩,提高了断层基础的承载力。本文介绍锦屏一级水电站大坝左岸f2断层高压冲洗水泥置换灌浆加固施工技术的成功运用。     

Multinational subsidiary knowledge protection—Do mandates and clusters matter?

International knowledge spillovers, especially through multinational companies (MNCs), have recently been a major topic of academic and management debate. However, most studies treat MNC subsidiaries as relatively passive actors. We challenge this assumption by investigating the drivers of knowledge protection intensity of MNC subsidiaries. We argue that knowledge protection intensity is determined by MNC subsidiary mandates and by opportunities and risks originating from the host region. We hypothesize that not just competence-creating but also competence-exploiting mandates increase knowledge protection intensity. In addition, technological cluster regions in the host country can be expected to provide opportunities for knowledge sourcing and MNC subsidiaries may be willing to protect knowledge less intensively to participate in cluster networks. We test our hypotheses using a dataset of 694 observations of 631 MNC subsidiaries in Germany and develop recommendations for research, managers and policy makers.     

方差分析中F统计量计算教学研究

以具体工作中方差分析的两个例子,尝试回答方差教学中经常碰到的两个问题,(1)方差分析能解决什么问题;(2)怎样解释方差分析中F统计量的计算。通过教学过程两种讲授方法的比较,得出从样本数据分布的视角进行F统计量计算的教学方法效果更好。     

大气中F与ClNO_2/ClONO反应机理的理论研究

用B3LYP理论研究了大气中F与硝酰氯(ClNO2)及顺/反亚硝酸氯(ClONO)分子反应的机理.在6-311++G**的基组水平上,优化得到了反应物、过渡态、中间体和产物的几何构型,通过振动分析对过渡态和中间体构型进行确认.计算结果表明:F与ClONO分子的反应有三种不同的反应机制,而对ClNO2分子的进攻有两种不同的反应方式.其中F与cis-ClONO发生的直接Cl提取反应是主反应通道,产物P1(NO2+ClF)为主要产物.     

论罗斯福“新政”中的金融货币政策及其影响

罗斯福“新政”中的金融货币政策在短期内对稳定大危机中美国的企业形势,恢复美国民众的信心,刺激美国经济的恢复有很大的作用,但是,由于受美国的孤立主义传统,罗斯福思想的转变以及“新政”的应急性等因素的影响,罗斯福政府拒绝参与国际金融合作,坚持不承担稳定世界经济义务,甚至推行诸如购金银等以邻为壑的政策,因此,罗斯福“新政”中的金融货币政策在很大程度上加剧了世界金融,乃至世界经济体系在30年代的分裂,世界经济秩序因此进一步恶化,并最终造成美国经济也无法在二战前者出30年代的大萧条。     

Shi‘ism and the Early Dinars of the Fāṭimid Imam-caliph al-Mu‘izz li-dīn Allāh (341–365/952–975): An Analytic Overview

The Imam-caliph al-Mu‘izz al-Dīn Allāh undertook a series of monetary changes which were to have a monumental impact on all future Fā?imid coinage, would lead to many imitations even after the dynasty had fallen, and create an easily identifiable pattern that attracted medieval merchants and modern collectors. The fact that al-Mu‘izz's coinage went through three stages with slight variations in the wording and layout indicates that he was determined to create a new model for Fā?imid coinage which would distinguish it from the Aghlabid and ‘Abbāsid coinage that preceded and competed with it. In contrast, Sijilmasa coinage was so conservative in layout due to its role in the African trade.     

基于MSP430的智能婴儿床的设计与实现

以MSP430F149芯片为核心,设计并实现了一种智能型婴儿床．这种智能型婴儿床能够通过声控接收电路接收声音信号,从而改变婴儿的睡眠环境,提高婴儿的睡眠质量．主要讨论了该智能型婴儿床硬件和软件部分的设计思想以及实现方法,并提供了试验测试数据．试验验证了设计方案的合理性和可行性,并具有一定的实用性．