综放工作面动态分次加架技术实践

针对一些不规则布置的综放工作面,介绍了当工作面长度变长时,采取不同的布置及加架方式的优缺点。这对于一些储量较少,地质条件复杂的矿井具有很好的借鉴意义。     

新疆林木种苗产业的市场结构、企业行为与市场绩效

市场结构和行为对市场绩效的影响机制是解释产业发展的重要前因。通过实地调研,分析新疆林木种苗产业组织市场结构-市场行为-市场绩效内在规律。结果表明,新疆林木种苗产业市场结构属于垄断竞争型市场结构;相当数量企业生产能力效率较低;市场种苗产业的生产能力利用率不高,市场绩效低下。基于结论,提出从优化市场结构,调整市场行为两个方面进行产业政策调整,进而提高市场绩效。     

Central banks and macroeconomic policy choices: Relaxing the trilemma

Macroeconomic policy choices in open economies are constrained by the trilemma according to which the objectives of exchange rate stability, monetary independence and capital mobility cannot be attained jointly. This paper shows that foreign exchange interventions provide an effective instrument to relax the trilemma. An active reserve policy allows central banks to pursue independent monetary and exchange rate policies when the capital account is liberalised.We use the framework of the portfolio balance model to show that exchange market interventions may substitute for capital controls. Both allow a country to achieve the other two objectives of the trilemma. Our empirical analysis of a large country panel data set covering the period 1970–2010 confirms this theoretical insight: the weighted sum of the three trilemma objectives increases in the degree of foreign exchange market intervention. The capacity to relax the trilemma constraint has increased over time and has been most effective in emerging markets.     

The shadow costs of repos and bank liability structure

Making use of a structural model that allows for optimal liquidity management, we study the role that repos play in a bank׳s financing structure. In our model the bank׳s assets consist of illiquid loans and liquid reserves and are financed by a combination of repos, long-term debt, deposits and equity. Repos are a cheap source of funding, but they are subject to an exogenous rollover risk. We show that the use of repos inflicts two types of indirect (“shadow”) costs on the bank׳s shareholders: first, it induces the bank to maintain higher liquid reserves in order to alleviate the additional default risk; second, it adds to the cost of long-term debt financing. These shadow costs limit the bank׳s appetite for cheap but unstable repo funding. This effect is, however, weakened under poor returns on risky assets, access to deposit funding and the depositor preference rule. We also analyze the impact of a liquidity coverage ratio, payout restrictions and a leverage ratio on the bank׳s financing choices and show that all these tools are able to curb the bank׳s reliance on repos.     

日本掠夺东北森林资源对生态环境的破坏和影响 ——以松花江流域为例

日伪时期,松花江流域的森林资源遭受到日本侵略者的疯狂采伐。日本侵略者通过修建森林铁路将大量砍伐的木材运往国内,同时在东北地区开设一系列制材工厂以满足其战时需求。日本殖民者对森林资源的破坏严重影响了流域内的生态环境,造成水土流失加剧,旱涝灾害频发,大量珍贵动植物数量减少,松花江水质污染、空气污染严重,对战时乃至战后人民的生产生活造成极大危害。     

对当前我国外汇储备基金实现投资增值的思考

外汇储备必须在满足流动性和安全性前提下,拓展投资渠道,控制投资风险,提高投资收益.近几年来,我国外汇储备持续高企,而外汇储备基金投资却只有3%的营运收益率.本文分析了我国外汇储备基金投资增值的现状,从区分管理功能和投资功能,组建高效基金运营模式;设定投资基准和投资限额,控制和规避投资风险;优化外汇储备的货币结构和资产结构,拓宽投资渠道;加快培养吸纳国际金融市场操作人才,完善有关法规等几个方面提出了改进外汇储备基金投资增值的对策.     

伊春森林生态旅游业发展问题研究

伊春森林生态旅游业经过多年的发展已粗具规模,在取得较好的经济效益的同时,也显露出不容忽视的生态环境及经济社会问题.为此,要实施政府主导战略;大力推进森林生态旅游产业的社会化,扩大区域合作;大力推进森林生态旅游产业的信息化;提升森林生态旅游业的产业化水平,构建特色旅游经济体系.     

依托资源优势发展哈尔滨市森林旅游业

哈尔滨市的森林旅游资源十分丰富,有众多的森林公园和自然保护区,但哈尔滨森林旅游尚处于起步和发展阶段,如何利用森林旅游资源,发展森林旅游,对其今后的发展战略和科学规划进行研究是目前亟待解决的问题.哈尔滨市应依托资源优势,大力发展森林旅游业.     

《森林法》修改应该厘清森林的法律概念

我国《森林法》的修改面临很多问题。其中有一项非常重要而且应当给与高度关注的事是厘清森林的法律概念。梳理与之有关概念。譬如森林、森林资源、林地、林木、林权、集体林权、林地等。对于众多有关森林的法律概念,我们应该通过明晰森林的概念将各个相关的概念衔接起来以便理顺各种关系。     

库存管理与国家石油储备

本文试用库存管理、"牛鞭子效应"、安全库存和库存成本等库存管理的基本理论,结合我国石油开采量与消费现状分析建设国家石油储备的重要性、迫切性和石油储备的相关成本。