输出假设理论对我国英语教学的启示

语言学家Swain所提出的语言输出的功能和输出假设模式是语言学研究的重要理论,系统了解输出假设理论会对我国英语教学产生积极的启示。当前我国的英语教学中存在一个突出问题,那就是"高分低能、哑巴英语、费时低效"。在英语教学实践中,重视语言输出作用,强化输出练习有助于解决这一问题。     

“教学做”一体化的高职土木工程专业实训室建设研究

本文分析了土木工程实训室建设的现状,探讨了"教学做"一体化实训室建设的措施,并预测了"教学做"一体化实训室的实训效果。     

新媒体时代建构主义在音乐鉴赏中的价值研究

建构主义在新媒体时代的应用模式不断得到创新。本文结合新媒体技术的特点,深入剖析建构主义理论在音乐鉴赏课程教学中的重要价值。     

Multifactor risk loadings and abnormal returns under uncertainty and learning

We explore the time variation of factor loadings and abnormal returns in the context of a four-factor model. Our methodology, based on an application of the Kalman filter and on endogenous uncertainty, overcomes several limitations of competing approaches used in the literature. Besides taking learning into account, it does not rely on any conditioning information, and it only imposes minimal assumptions on the time variation of the parameters. Our estimates capture both short- and long-term fluctuations of risk loadings and abnormal returns, also showing marked variation across US industry portfolios. The results from mean-variance spanning tests indicate that our baseline model yields accurate predictions and can therefore improve pricing and performance measurement.     

Can negative interest rates really affect option pricing? Empirical evidence from an explicitly solvable stochastic volatility model

The profound financial crisis generated by the collapse of Lehman Brothers and the European sovereign debt crisis in 2011 have caused negative values of government bond yields both in the USA and in the EURO area. This paper investigates whether the use of models which allow for negative interest rates can improve option pricing and implied volatility forecasting. This is done with special attention to foreign exchange and index options. To this end, we carried out an empirical analysis on the prices of call and put options on the US S&P 500 index and Eurodollar futures using a generalization of the Heston model in the stochastic interest rate framework. Specifically, the dynamics of the option’s underlying asset is described by two factors: a stochastic variance and a stochastic interest rate. The volatility is not allowed to be negative, but the interest rate is. Explicit formulas for the transition probability density function and moments are derived. These formulas are used to estimate the model parameters efficiently. Three empirical analyses are illustrated. The first two show that the use of models which allow for negative interest rates can efficiently reproduce implied volatility and forecast option prices (i.e. S&P index and foreign exchange options). The last studies how the US three-month government bond yield affects the US S&P 500 index.     

Modeling regional economic dynamics: Spatial dependence,spatial heterogeneity and nonlinearities

Spatial modeling of economic phenomena requires the adoption of complex econometric tools, which allow us to deal with important methodological issues, such as spatial dependence, spatial unobserved heterogeneity and nonlinearities. In this paper we describe some recently developed econometric approaches (i.e. Spatial Autoregressive Semiparametric Geoadditive Models), which address the three issues simultaneously. We also illustrate the relative performance of these methods with an application to the case of house prices in the Lucas County.     

道德哲学视域下的关公崇拜

在中国传统民间信仰之中,关公崇拜是俗文化兴起的产物,是社会道德情感社会潜意识孕育产生的一个道德模范,经典的三国演义为关公崇拜提供了有力的文本支撑,历代统治者的推波助澜也为这种崇拜发展起了重要作用。同时,关公崇拜背后有着深厚的道德内涵和社会价值,它所推崇的"义"是一种超越传统血亲关系的品德。这种品德即使在今天的商业社会也有着其存在发展的土壤,这也是关公崇拜得以延续至今的重要原因。     

试论高职英语教学的改革与创新

本文主要是通过对目前我国高职英语教学的现状分析,探讨我国高职英语教学改革方向以及创新措施。     

浅议建筑给排水实验教学的研究意义

文章通过跟踪调查实际教学中的《建筑给排水》课程,研究和寻找建筑专业课程在探究型教学模式下的应用和效果,对教学中的问题进行分析,提出适合专业教学的方法,并就如何更加完善《建筑给排水》的教学模式进行讨论。