江口电站进水闸安全复核及加固处理

文中论述了电站的进水闸的布置,实测闸基扬压力的分布,闸基扬压力与库水位的相关关系;采用毕肖普简化条分法及传递系数法对进水闸整体稳定作了复核,采用剪摩公式也计算了环2~$缝之前闸室段的抗滑稳定;并对进水闸的稳定性作出评价,最后提出了加固处理方案.     

The Effect of SFAS No. 131 on the Cross-segment Variability of Profits Reported by Multiple Segment Firms

Our study assesses whether SFAS No. 131 improved disclosure about the diversity of multiple segment firms’ operations. We find a post-SFAS No. 131 increase in cross-segment variability of segment profits, an increase in the association between reported and inherent cross-segment variability, and an increase in association between reported variability and capital market incentives to disclose. We interpret the results as evidence that SFAS No. 131 increased the transparency of segment profitability disclosures, and as indicating SFAS No. 131 allowed firms depending more on external financing to disclose more about differences in segment profitability.

Do investors misprice components of net periodic pension cost?

We examine whether and how investors misprice the components of net periodic pension cost under SFAS No. 87 and 158. We find that investors appear to have difficulty in understanding the transitory feature of other net periodic pension cost (PPOPCC) and thus overestimate its persistence, which in turn leads to the mispricing of PPOPCC in the pre‐158 period. We also find that SFAS No. 158 appears to reduce the mispricing of PPOPCC, suggesting a positive effect of SFAS No. 158 on investors' valuation of pension items in the income statement. Additional analysis suggests that investors also overestimate the persistence of, and thus misprice, pension‐related cash flows and accruals in the pre‐158 period and that SFAS No. 158 reduces the mispricing of pension‐related cash flows and accruals.     

Can stochastic discount factor models explain the cross-section of equity returns?

We propose a multivariate test of the capital asset pricing model (C-CAPM) of the cross-sectional variation in equity returns in which we compare cross-sectional variation in equity returns to the cross-sectional variation in their conditional covariance with stochastic discount factors. We use a multivariate generalized heteroskedasticity in mean model to estimate 25 portfolios that are formed on size and the book-to-market ratio. Each portfolio is allowed to have its own no-arbitrage condition. We find that although the conditional covariances of returns with consumption exhibit negative variation across size, they do not vary across the book-to-market ratio. Thus, C-CAPM can capture the size effect, but not the value effect. The fit is, however, improved by allowing the coefficients on the consumption covariances to be different. The value effect appears to be associated with the book-to-market ratio as well as size. On its own the book-to-market ratio does not generate additional information about average returns to C-CAPM. A possible explanation for these findings is that both small and low book-to-market ratio firms are expected to have higher rates of growth.     

电子系统未发现故障研究综述

电子系统的复杂度日渐增加,工艺水平日益提升,未发现故障(NFF)事件频发,对电子设备产生很大的影响,常导致不必要的重复停机、过度修理和零备件大量损耗等问题,影响设备的战备完好性。主要从NFF事件的基本概念和相关术语、NFF事件原因如故障因素和非故障因素、间歇故障引起NFF事件的机理等方面对NFF 事件进行系统论述,并指出了NFF事件的危害及其应对/预防措施,列举了相关实例,以期给相关工程和研究人员以借鉴,促进对NFF事件的研究。     

长洲水利枢纽三线四线船闸建设征地移民安置初步规划

文章根据调查的实物指标,结合征地区的情况,在分析安置区的环境容量后提出符合当地情况的移民安置规划,并对移民安置静态投资作出了估算。     

河南省新密煤田翟沟井田地质特征

本文以新密煤田翟沟井田勘探资料为基础,对井田区域构造特征、二1煤层煤质特征、二1煤层水文地质特征、含煤地层沉积特征及沉积环境等进行分析,研究翟沟井田地质特征,为新密煤田二1煤的开发利用提供了方向。     

浅谈超声非正式出版文献的获取和利用

收集和分析非正式出版文献,可以挖掘情报,了解竞争对手,预测技术发展方向。本文阐述了超声非正式出版文献的概念并提出了四种获取方法:搜索引擎检索、专业网站检索、网盘检索和间接获取。实践表明,以较少的投入获取了丰富的资料,通过分析将情报应用于科研、经营等。     

江都站不同型号机组叶片全调节优化运行效果分析

以单机组运行耗电费用最小为目标函数,采用动态规划法,对江都站不同型号机组、不同日平均扬程、不同运行负荷组合生成的45种方案,分别按考虑分时电价与不考虑分时电价,进行叶片全调节（变角）优化计算,同时进行相应的常规运行计算,最后以单位提水费用作为分析指标,对不同型号机组变角优化运行效果进行比较分析,其结论为考虑分时电价、长江潮位影响等因素的站群变角优化研究提供决策依据,同时为大中型泵站改造与经济运行提供参考。     

天生桥一级水电站安全监测信息管理系统

 利用Visual Basic强大的图形处理功能及数据库连 接和数据处理功能，采用面向对象的编程技术，开发了天生桥一级水电站工程安全监测信息 管理系统。该系统在功能及用户界面等方面都具有较好的通用性，对于同类工程具有一定的 推广价值。