城市地下空间开发使用权管理问题研究

我国城市发展速度不断加快,土地利用与土地资源的稀缺性之间的矛盾日益加剧。在土地平面开发模式逐渐转变为立体开发模式的过程中,地下空间的开发利用及其使用权管理相关的诸多问题却没有被妥善处理。为了能够更好地管理土地资源,达到集约合理利用的目的,我们对地下空间的开发利用及权属管理应当慎重对待。     

煤矿企业区队如何抓好班组安全建设

煤矿安全事故是以人为主体、在生产过程中突然发生、与人的意志相反的事件,事故发生时一定有不安全的行为和不安全的条件.也就是说影响安全生产的有2个主要因数:一个是物的不安全因数;另一个是人的不安全行为.     

非晶态Ni—P化学镀液的维护及不良镀层的退除

本文介绍了非晶态 Ni—P 化学镀液的维护和不良镀层的退除。     

What are returns outside trading hours capturing for volatility of individual stocks?

This study is the first to harness the negative returns and squared returns outside trading hours, trading volume and leverage effects in an augmented heterogeneous autoregressive model for forecasting volatility of individual stocks. Besides significant leverage effects and trading volume impact, we find that an increase in the negative returns is associated with a decline in volatility, but an increase in the squared returns is associated with a rise in volatility. This new finding suggests that the negative returns and squared returns outside trading hours are capturing additional leverage effects and additional volatilities, respectively. Moreover, the relations display differences amongst various firm categories which arise from firm heterogeneity.     

黑龙江省乡村旅游发展模式探析

乡村旅游在发达国家和地区发展较好,黑龙江省尚处于起步阶段。乡村旅游开发的一般模式包括私有农场或牧场模式、企业或机构独立经营模式、农户分散经营模式、农户联合经营模式、企业与农户联合经营模式以及地方政府、企业与农户联合经营模式。目前,适合黑龙江省的乡村旅游发展模式包括国有农场或牧场模式、企业或机构独立经营模式、农户分散经营模式、政府支持下的农户联合经营模式。     

The global recession and China's stimulus package: A general equilibrium assessment of country level impacts

A dynamic computable general equilibrium model is developed to assess the impact of the recent global recession and the Chinese government's stimulus package on China's economic growth. By designing two scenarios – one with and one without the stimulus package – the model results show that GDP growth rate in 2009 could have fallen to 2.9% without the stimulus package, mainly as a result of the sharp decline in exports of manufactured goods. Under the stimulus scenario, with the generated additional demand on investment goods, the Chinese economy grows 8–10% in 2009 and the succeeding years. The model also measures the overall gains of the stimulus package, and the cumulative GDP growth difference between the two scenarios for 2009–15 is about RMB76 trillion.     

Market segmentation and supply-chain predictability: evidence from China

We determine the industry-level supply-chain predictability in the Chinese stock market. Evidence is provided that a limited information model is gradually adaptive to the Chinese stock market in recent years, while several traditional measures of informed trading perform differently in the previous period. An innovative indicator of the mobile ratio volatility is also proposed here, which relates the increasing mobile trading behavior to this cross-sectional predictability. Furthermore, we explain the asymmetry of customer and supplier momentum in this market.     

甘氨酸的生产现状及发展趋势

我国是世界上甘氨酸生产国之一，目前中国甘氨酸的生产技术基本都采用已经被国外淘汰的氯乙酸氨解法工艺，虽然经过持续的改进，提高了反应的收率和产品的质量，但与国外技术相比较，仍有生产成本高，产品质量差的劣势，且只能生产工业级甘氨酸。文章分析了国内外甘氨酸的生产现状及市场情况，对制约我国甘氨酸发展的重要因素进行了讨论，建议重点发展以羟基乙腈为原料的直接Hydantion工艺，生产纯度在99．5％以上的甘氨酸产品，进一步拓展其在食品加工业中的应用。     

关于金融创新与我国金融产权制度关系的探讨

任何创新活动的形成所暗含的一个基本假设，是必须存在以“内在因素”为本的创新主体为前提，才能在外部环境的刺激下，获得创新的原动力。迄今为止，我国包括商业银行改革在内的金融改革，实际上全是由政府效用函数所牵引的政府行为。我国商业银行受金融产权关系的制约，尚未真正成为创新主体，也不存在创新的“内在因素”与动力。     

关于开发乡村休闲度假旅游的思考

乡村旅游以休闲度假为主要形式,这是社会和时代及旅游业发展的需要。开发乡村休闲度假旅游是旅游业与农业的有机结合,对农业发展有着广泛的战略意义。该文还提出了乡村休闲度假旅游开发应注意的几个问题。