马克思劳动价值论的新思考

劳动价值论是马克思主义政治经济学的理论基础.劳动创造价值是马克思劳动价值论的根本命题,而社会分配关系本质是社会生产资料私有权在经济上的实现.正确地区分价值创造和价值分配关系,是社会主义市场经济条件下坚持马克思劳动价值论的根本所在.     

略论思想教育工作艺术化--关于当代大学生思想品德教育与美育结合的探析

思想教育既是科学又是艺术 ,艺术化的思想教育工作是教育的最高境界。思想品德教育与美育都属于思想教育的范畴 ,在大学生日常思想品德教育中 ,导之以美育 ,将思想品德教育与美育有机地结合起来 ,增强思想品德教育的艺术性 ,有利于提高思想品德教育的功能效应。     

The Integration of Artificial Neural Networks and Text Mining to Forecast Gold Futures Prices

Although a previous study found that neural network forecasts were more accurate than time series models for predicting Latin American stock indexes, the forecasting accuracy of neural network for predicting gold futures prices has never been discussed. Therefore, the first objective of this study is to compare the forecasting accuracy of a neural network model with that of ARIMA models. Furthermore, the fluctuations in gold futures are not only influenced by the quantitative variables, but also by many nonquantifiable factors, such as wars, international relations, and terrorist attacks. The second objective of this study is therefore to propose the integration of text mining and an artificial neural network to forecast gold futures prices. The historical gold futures prices from 1999 to 2008 were used as training data and testing data, and the prices of 2009 were used to examine the effectiveness of the proposed model. The results of empirical analysis showed that an artificial neural network forecasted gold futures prices better than ARIMA models did. In addition, text mining provided a reasonable explanation of the trend in gold futures prices.     

灰色BP网络预测方法在公交客流预测中的应用

本文将BP网络模型与灰色系统预测方法相结合,建立了公交客流量预测模型。该模型有自组织 和自学习的功能,可以根据每次学习误差的不同,不断调整学习速率,加速收敛过程,充分排除数据样本 的随机性影响。与传统的公交客流量预测方法相比,本模型预测结果具有更高的精度。     

Combining editing and imputation methods: an experimental application on population census data

Summary.  Features of census data make the editing and imputation phase a complex matter. Complex editing and imputation tasks can be tackled by dividing the editing and imputation process into subphases characterized by different problems, and finding appropriate solutions for each of them. An experimental application of the approach of combining different currently used methods for the editing and imputation of population census data is presented.     

ASP三元复合体系宏观流变特征研究

利用HAAKE RV-100旋转流变仪和TR-1加压式毛管粘度计,在10^-1s^-1~10⁴s^-1的剪切速率范围内,测定了不同配方的三元复合体系的流变特性。流变数据处理结果认为,三元复合体系流变性可用Carreau模型来描述。研究结果显示,在所研究的条件下(碱浓度0.5%~1.5%、聚合物浓度800 mg/L~1200 mg/L、表面活性剂浓度800~1200 mg/L),三元复合体系表现出类似于聚合物溶液的流变特征,在低剪切速率和高剪切速率下,体系表现出牛顿流体特征;在中等剪切速率下,呈现剪切变稀的流变特性。随着碱、表面活性剂浓度的增加,三元复合体系的零剪切粘度下降,剪切变稀性能减弱。     

高职会计电算化专业人才培养模式改革研究

为了适应社会发展的需要，河北青年管理干部学院会计电算化专业提出了“仿真实训、课证结合”的人才培养模式。本文介绍了“仿真实训、课证结合”人才培养模式的内涵、特点和实施框架，并根据我院的实际情况介绍了该模式的实施效果。     

Testing and Valuing Dynamic Correlations for Asset Allocation

We evaluate alternative models of variances and correlations with an economic loss function. We construct portfolios to minimize predicted variance subject to a required return. It is shown that the realized volatility is smallest for the correctly specified covariance matrix for any vector of expected returns. A test of relative performance of two covariance matrices is based on work of Diebold and Mariano. The method is applied to stocks and bonds and then to highly correlated assets. On average, dynamically correct correlations are worth around 60 basis points in annualized terms, but on some days they may be worth hundreds.     

INDEX TO VOLUME 7 (1989)

Surveys of forecasters, containing respondents’ predictions of future values of key macroeconomic variables, receive a lot of attention in the financial press, from investors and from policy makers. They are apparently widely perceived to provide useful information about agents’ expectations. Nonetheless, these survey forecasts suffer from the crucial disadvantage that they are often quite stale, as they are released only infrequently. In this article, we propose MIDAS regression and Kalman filter methods for using asset price data to construct daily forecasts of upcoming survey releases. Our methods also allow us to predict actual outcomes, providing competing forecasts, and allow us to estimate what professional forecasters would predict if they were asked to make a forecast each day, making it possible to measure the effects of events and news announcements on expectations.     

从《金瓶梅》、《红楼梦》等看宋元明清汉语“洗涤”语义场

宋元明清时期,汉语“洗涤”语义场在所考资料中存有12个义场成员——“沐”、“浴”、“澡”、“盥”、“浣（瀚）”、“濯”、“洗,”、“涤”、“漱”、“淘”、“荡”、“涮”。义场格局发生了丰富的变化。有旧词的消亡、旧词的复出、新词的产生和原有成员的发展演变。