对21世纪高职体育教育改革的思考

现代教育改革与发展的生命力在于教育观念的变革,这就是我们在实现新世纪行动纲领过程中必须始终坚持的基本命题。促进青少年健康全面发展,不仅直接决定着经济发展、体制创新、科技创新、理论创新的程序与水平,而且也是事关坚持党的基本路线一百年不动摇的大事。“正确引导和帮助青少年学生健康成长,使他们能够德、智、体、美全面发展,是一个关系我国教育发展方向的重大问题。”本文对高职体育教育改革的趋势作了分析,论述了观念改革是体育教育改革的前提,教育目标的确定、教学内容和手段的创新是关键。     

Austerity measures in crisis countries — results and impact on mid-term development

Since the onset of the sovereign debt crisis, the crisis-stricken countries in Europe have been pushed to take drastic steps to consolidate their finances and reduce their budget deficits. Despite strong public opposition and largely damaging short-run effects, the countries have undertaken many of the internationally recommended/mandated reforms and spending cuts. In this Forum, authors from Greece, Ireland, Italy, Spain and Portugal report on the fiscal consolidation achieved in their respective countries — and the sacrifices that have made it possible. Furthermore, the authors detail what remains to be done to resolve the crisis.     

客运专线箱梁混凝土裂缝控制措施

介绍了铁路客运专线箱梁的施工过程中,箱梁混凝土裂缝的成因,提出了相应的控制措施。     

Inter-temporal examination of the trading activities of foreign investors in the Korean stock market

In the full market-opening period of the Korean stock market (1999–2006), when foreign equity ownership reached as high as 40% of the total stock market capitalization, foreign net flows move in the same direction contemporaneously with the domestic market return, while lagged foreign flows are not followed by any significant changes in the domestic market return. On the other hand, an increase (decrease) in foreign net buy is followed by Won appreciation (depreciation) relative to the US dollar; however, the reverse relation does not hold. Throughout the entire sample period (1995–2006), foreign flows are not significantly related to stock market return volatility.     

The Effectiveness of Capital Controls

Open Economies Review - We investigate the effectiveness of capital controls using capital control indicators specific to several asset categories. The effectiveness of these policy instruments is...     

混凝土桥常见病害分析与防治

分析了混凝土桥梁常见病害,介绍了混凝土桥梁加固与技术改造的常用方法。     

Learning non-rational expectations equilibria

A hyperinflation model is analyzed under bounded rationality learning. Agents believe in a misspecified model which is correctly specified at theRational Expectations Equilibrium of the model and they adjust their beliefs by means of theLeast Mean Squares algorithm. Convergence of the bounded rationality learning activity to anon-Rational Expectations Equilibrium point is obtained for any set of parameters of the model.

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Sommario In questo lavoro gli autori analizzano il modello di iperinflazioneà la Cagan sotto l'ipotesi di razionalità limitata. Gli agenti non formano le loro aspettative coerentemente con la struttura completa del modello economico, essi si basano su un modello lineare non correttamente specificato che risulta essere corretto soltanto in corrispondenza dell'equilibrio con aspettative razionali. Si ipotizza che i soggetti aggiornino le loro aspettative tramite un algoritmo di apprendimento. Nel caso specifico, l'algoritmo adottato è ilLeast Mean Squares. Il principale risultato del lavoro è che l'apprendimento con razionalità limitata da parte dei soggetti economici può convergere ad un punto che non è un equilibrio con aspettative razionali. Il risultato è particolarmente interessante poiché la maggior parte degli studi noti in questa letteratura, nonostante non assicurino la convergenza ad un equilibrio con aspettative razionali, assicurano la non convergenza ad un equilibrio che non sia di aspecttative razionali. La convergenza ad un equilibrio non di aspettative razionali è dovuta ad una non corretta specificazione del modello secondo cui i soggetti formano le loro aspettative. In particolare, la convergenza ad un equilibrio non di aspettative razionali si verifica allorché i soggetti non tengono conto nel loro apprendimento di una variabile rilevante che essi classificano come rumore bianco.

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Authors would like to thank an anonymous referee and all of those who gave comments and suggestions at theSociety of Economic Dynamics and Control Conference (SEDC) '94 (Los Angeles, CA-USA);International Conference on Artificial Neural Networks (ICANN) '94 (Salerno, Italy);World Conference on Neural Networks (WCNN) '94 (San Diego, CA-USA);AMASES '94 Conference (Modena, Italy). The usual disclaimers apply.     

Regional Differentiation and Farm Exit: A Hierarchical Model for Tuscany

We analyse the exit behaviour of Tuscan farms during the period 2000–2007 both at the farm and the territorial level. The study combines data from the 2000 National Census of Agriculture and three waves of the ‘Farm Structure Surveys’. The exit probability of the resulting sample, composed of 3,187 farms, is estimated through a Bayesian hierarchical probit model. Our results show that exits reflect the size and type of holdings. Likelihood of exit is higher in areas of higher population density that are not classified as ‘urban’ areas.     

支持向量机模型在断层破碎带围岩变形预测中的应用

围岩变形预测是隧道安全评价及其指导后期施工的重要依据,为提高变形预测精度,结合工程实践,提出了PSO-SVM-BP预测模型的思路。首先,利用三次样条插值及二次平滑法对变形数据进行预处理,为后期变形预测奠定基础;其次,利用粒子群算法对支持向量机进行参数优化,建立PSO-SVM模型,并对围岩变形进行初步预测;最后,利用BP神经网络进行误差修正,达到综合预测的目的,并利用工程实例进行检验,以验证预测模型的有效性。结果表明:初步预测结果的相对误差均小于5%,而误差修正后的预测精度被提高到0.97%,预测精度较高,验证了预测模型的有效性,可为类似研究提供参考。