2000～2018年乡村教师队伍建设研究热点与演化趋势研究

从CNKI数据库收录的2000—2018年文献中,筛选出2148篇"乡村教师队伍建设"领域相关文献,利用CiteSpace和SA-TI3.1软件,对样本文献外部特征、关键词共现、知识演进趋势与热点前沿展开知识图谱分析。首先,展示了乡村教师队伍建设研究现状,梳理了发展动态。其次,划分了"科学发展观""教师教育""特岗教师"和"义务教育管理体制"四大热点研究领域。在此基础上将乡村教师队伍建设研究分为3个演进阶段,并总结出"农村小规模学校""乡村教师专业发展""特岗教师"和"教师流动"四个方向为该领域的前沿热点。最后,分别从公费师范生、基础设施建设和乡村教师的幸福感等方面获得了一些启示。     

Modelling the behaviour of the new issue market

This paper analyses the time series behaviour of the initial public offering (IPO) market using an equilibrium model of demand and supply that incorporates the number of new issues, average underpricing, and general market conditions. Model predictions include the existence of serial correlation in both the number of new issues and the average level of underpricing, as well as interactions between these variables and the impact of general market conditions. The model is tested using 40 years of monthly IPO data. The empirical results are generally consistent with predictions.     

巷道快速掘进技术在贵州省煤与瓦斯突出煤层中的探讨与应用

巷道快速掘进技术是一项系统工程。为了实现矿井高产高效,必须以巷道快速掘进技术为前提和保障。本文以贵州省为例,探讨了巷道快速掘进技术的研究现状及影响因素。针对贵州某矿突出综合检测指标经常超限、掘进速度慢等问题,采用了高压水射流割缝与瓦斯抽放边抽边掘相结合技术。研究表明:该项技术能有效削弱煤层突出危险性,大幅度提高瓦斯抽放量且巷道掘进速度提高了2~3倍。同时根据贵州省的本土情况,提出了针对性地建议和措施,能为巷道快速掘进技术的推广与应用提供一定的指导。     

温泉度假村旅游服务质量评价实证研究——以河源御临门温泉度假村为例

以河源御临门温泉度假村为例,以温泉旅游服务质量评价问卷为基础,对影响温泉旅游服务质量的20个因素进行了分析,探讨游客对温泉度假村整体旅游服务质量的总体评价。建议度假村从"原生态"温泉文化、温泉旅游解说系统的建设、特色客家温泉饮食文化、员工培训等四个方面进行完善与提高,提升服务满意度。     

Venture capital funds and the public equity market

This paper considers the relationship between the public equity market and the returns to venture investing using a dataset which is derived from the records of two large limited partners who have been investing in venture capital for almost 30 years. Evidence is found to suggest that market conditions over the investment cycle, and exit conditions at the time of exit in particular, are an important determinant. This paper also investigates whether any other aspects of the venture investment process respond to events in the broader market. While general trends are evident in the venture investment cycle, only the intensity of the investment process is found to respond to events in the public equity market.     

投资者关注与IPO异象——来自网络搜索量的经验证据

利用谷歌趋势提供的搜索量数据,本文构建了一个投资者关注的直接衡量指标,在此基础上,运用行为金融学里投资者关注的理论,系统解释了IPO市场存在的三种异象。与文献中常见的其他解释变量相比,本文发现IPO前个股网络搜索量对于市场热销程度、首日超额收益和长期表现有更好的解释力和预测力,它可以解释首日超额收益的23%,长期累积收益率的10%以上,结果均十分显著。研究结果表明,投资者关注对资产价格有直接的影响,2009年的新股发行体制改革对首日超额收益的降低起到了明显作用。     

央行加息对我国经济运行的影响

金融危机后的我国经济,通货膨胀的趋势日益增强。为了控制这种局面,我国央行从去年10月份开始采取加息的金融政策和手段,来直接影响到膨胀带来的CPI的不良上涨的局势。从经济发展的角度来看,利用加息的手段是不得已为为之的措施。本文通过对我国今年3次加息政策实施,以及对我国资本市场的变化以及对房地产和股市的影响等几方面展开论述,分析了加息手段应用的现实效应和利弊,在对目前即将开展的进一步加息政策提出自己的观点。     

Drivers and barriers to the adoption and diffusion of Sustainable Jet Fuel (SJF) in the U.S. Pacific Northwest

Sustainable Jet Fuel (SJF) represents an important component of the airline industry's strategy to simultaneously reduce GHG emissions while meeting a growing demand for international air travel. SJFs also have the potential to provide fuel supply diversification and security, enhance fuel price stability and provide regional/rural economic development benefits. This paper measures and ranks perceived drivers and barriers to an economically viable SJF industry in a unique U.S. region, the U.S. Pacific Northwest (PNW), through personal interviews with key aviation fuel supply chain stakeholders conducted from June to September 2015. In addition to providing a fertile arena for this first effort to systematically assess these drivers and barriers, the U.S. PNW is unique due to the region's long strategic focus on aviation innovation and its importance to the regional economy, the seminal efforts in the region to outline a path forward on SJF beginning in 2010, and the relatively small population spread over a large geographic area with a limited number of “hub” airport nodes which geographically concentrates aviation fuel demand and distribution. Nineteen stakeholder interviewees acknowledge that, in order for regional SJF adoption-diffusion to occur, airline jet fuel buyers must drive the process, particularly as they deal with greenhouse gas (GHG) emission issues and related policy considerations. Important perceived barriers to SJF industry scale-up in the U.S. PNW include the high production costs of SJF and related issues, such as fuel logistics and quality control in the transport, storage, and blending of SJFs. Perceptions around chain-of-custody issues, such as blending, tracking, and crediting of SJFs and future SJF market share projections for the year 2030 were also examined. Incorporating stakeholder input into discussions about adding blended SJF into the U.S. aviation fuel supply provides needed insight for the biofuels industry, policymakers, and researchers.     

我国农产品价格与热钱的实证研究

自2005年中国汇率形成机制改革以来,热钱流入中国的话题就开始趋热。在2006年末,世界农产品价格大幅上涨,围绕粮食、食品的国内外投资和交易成为新的经济热点。鉴于最近中国农产品价格发生了强烈波动的事实和农产品市场的重要性,本文通过对热钱规模和农产品价格指数的月度数据进行实证分析,得出热钱与农产品价格存在均衡关系,是农产品价格变化的Granger原因。     

射水抽气器影响汽轮机真空的原因及处理

针对一台25MW汽轮机组真空系统的特点,通过一次事故原因的查找,分析了因射水抽气器工作状况不良而引起的真空下降的原因,并提出了处理方法。