碳碳复合材料在光伏领域的应用与研究

直拉硅单晶炉、多晶硅铸锭炉是生产硅片的主要设备,其核心部件均为高纯石墨材料,随着太阳能光伏行业的发展,传统石墨材料很难满足直拉硅单晶炉和多晶铸锭炉生产设备的大型化需要,而碳碳复合材料具有良好的热物理性能,和石墨热场材料相比,具有非常大的优势,碳碳复合材料保温件、结构件和发热体将是直拉硅单晶炉和多晶铸锭炉等光伏设备热场材料的发展方向;针对碳碳复合材料结构件和保温件在使用过程中出现的问题,提出采用SiC涂层技术,来提高碳碳复合材料的使用效果和寿命,并在实验中取得了良好的效果。     

收入结构、经营风险及多元化选择:解析78家商业银行

以我国78家商业银行2005～2010年的非平衡面板数据为研究对象,运用两种不同的研究手段从非利息收入结构的视角考察银行收入结构的变化对其经营风险的影响。研究结果表明,非上市银行的非利息收入占比的增加有助于降低银行风险,而上市银行非利息收入占比的上升对降低银行风险不显著。出现上述现象的原因在于两个子样本存在非利息收入的结构差异;上市银行的非利息收入主要来源于手续费及佣金收入,而非上市银行的非利息收入则主要来源于投资收益。     

浅谈公路环境影响的评价

本文对公路建设环境保护作了比较深入地分析与探讨,对环境评价制度与方法进行了阐述,总结归纳了公路施工、营运期环境保护工作的重点与措施。     

Housing price fluctuations and financial risk transmission: a spatial economic model

Financial risk derived from housing price fluctuations in China garnered much public concern recently. Based on the theoretical analyses of the transmission of financial risk from housing price fluctuations, this paper establishes panel spatial Durbin models to empirically analyse housing price fluctuations and financial risks transmission from a spatial economic perspective. Employing the panel provincial data from 1999–2015, we conduct an analysis on the 30 provinces in China as well as a comparison among the Eastern, Middle and Western regions of China. The results indicate that: (1) The soaring housing prices driven by bank credit, real estate developers’ heavy investment, local governments’ land revenue and individuals and households demands leads to financial risk in various sectors; (2) due to the ‘substitution effect’, the capital agglomeration in metropolis from bank credits, real estate developers, and individuals and households furthers the amassment of financial risks; (3) housing prices have a significant spatial contagion effect throughout the country, and financial risk could directly transmit across provinces through housing price fluctuations; (4) financial risks could indirectly transmit across provinces via the ‘imitative behaviour’ or ‘driving effect’ of different sectors for different regions of China.     

港口旅游商机无限

伴随着连云港市旅游业的兴起,从1998年起,每年都有几万名游客来到连云港港口游览观光。内地的游客把“奔向港口观巨轮、走到码头看发展”作为了解改革开放成就、增长海洋、航运知识的一种最便捷、最有效的途径。连云港港务局按照“强主业、兴副业”的发展思路,今年初成立了连云港海港旅游有限公司,把以往只是用来装卸货物的场所与“旅游”相联,为港口又注入了新的功能。     

浅谈湿地生态系统健康研究

本文系统的介绍了湿地生态系统的概念、影响其健康的因素、以及湿地健康的评价指标和评价方法。对于湿地生态系统健康的研究有一定指导意义。     

A regime-switching term structure model with observable state variables

The paper proposes in a regime-shift framework, an arbitrage-free term structure model based on the target and Fed Funds Rates. Empirical observations suggest that a three-state regime-shift environment associated with FOMC monetary actions is justified. Then, a closed-form solution for zero-coupon bonds is derived where regime-shift risk is priced. The solution is flexible enough to incorporate additional state variables.     

煤层气井注入/压降试井工艺方法及存在的问题

目前在确定煤层气井的渗透率及储层参数时，广泛采用注入／压降测试的方法，单项注入／压降测试是目前煤层气勘探开发中最常用、最有效的试井方法。本文全面阐述了煤层气井注入／压降试井的施工工艺、施工工艺中存在的问题。     

Applicability of the Revised Mean Absolute Percentage Errors (MAPE) Approach to Some Popular Normal and Non-normal Independent Time Series

Commonly used Mean Absolute Percentage Errors (MAPE) and the authors’ revised Mean Absolute Percentage Errors (RMAPE) are applied to measure the forecasting accuracy from different Moving Average Methods for independent time series. Simulation results show that both MAPE and RMAPE can only provide sensitive forecasting accuracy measurements on Moving Average Methods when coefficients of variation (c.v.) are smaller than 0.4 or is much greater than 4.0 for those independent time series. For independent time series with moderate c.v.’s, the complexity from the ratios of MAPE and RMAPE will mislead researchers on distinguishing the forecasting accuracies from different Moving Average Methods. The complexity from the ratios will be released only when the c.v. is very small, or when the c.v. is very large. Therefore, when data are from independent time series, the Mean Absolute Deviation (MAD) reveals valid the forecasting accuracies from various Moving Average Methods, but not from MAPE or RMAPE.     

新会计准则中的公允价值及其面临的问题

2006年2月财政部新颁布的企业会计准则中,一个重大变化是按照现行国际惯例引入了公允价值,改变了历史成本计量属性在我国会计准则中一统天下的局面。本文对公允价值的概念以及引入公允价值在我国可能出现的问题和建议进行简单的分析。