应对高峰期客流的铁路运输组织策略研究

随着我国经济的迅猛发展,铁路客运出现了越来越多的客流高峰期。文章探讨在既有设施设备条件约束下,需要采用特殊运输组织方法解决客流高峰期问题。分析了客流高峰期的组成结构及行程原因后,提出了应对高峰期客流的运输组织策略。     

实施管杆分类管理 确保下井管杆质量

为更好地发挥管杆的使用价值,确保质量,延长检泵周期,中原油田采油一厂积极探索管杆管理的新思路,新办法。在借鉴国内油田先进管理经验的基础上,制定了管杆分年限、分类、分级使用管理的新办法。该管理办法是管杆管理的新模式,是有效解决管杆管理问题的新途径。     

“五四”时期湖南报刊勃兴的原因

“五四”时期，湖南报刊呈现出勃兴局面，其原因主要是：（一）社会动荡，政局不稳；（二）局部地区经济的繁荣与发展；（三）国内外革命潮流的影响及推动；（四）先进知识分子对报刊活动的重视。     

Looking Through the Trade Surplus Prism

Huge trade surplus attracks more and more attention to the China＇s economy operation, a controversial topic on people＇s lips as well.     

基于期权博弈的PPP项目特许权期决策模型

运用期权博弈方法,从无政府担保基本情形出发,构建 PPP 项目特许权期决策模型,考量政府参与风险分担对特许权期的影响。结果表明,收益波动率一定的情况下,特许权期随着政府最低收益担保期望价值的增加而减少;而在政府最低收益担保期望价值一定的情况下,特许权期随着收益波动率的增加而增加。鉴此,政府应根据项目的风险收益情况实施弹性特许权期制。     

DZ-1A重整预加氢催化剂的长周期工业应用

DZ-1A催化剂开车一次成功,8个月以后进行了标定,结果表明,该催化剂的加氢油各项指标达到了重整原料油要求.现在已经连续运转5α.该催化剂是一种性能优良、寿命较长的催化剂.     

银证战略联盟:混业经营的一种替代模式

国内目前在推行分业经营体制下 ,已有的金融混业过度模式包括金融控股公司模式、银行控股模式和实业资本控股金融机构模式。分析对比这些模式提出银证战略联盟模式具有相对优势 ,战略联盟模式是更具普遍意义的混业经营过渡模式。     

改进的“当前”统计模型变采样率目标跟踪算法

为满足实际雷达系统对高精度和高实时性的要求,提出了一种改进的“当前”统计模型变采样率机动目标跟踪算法。该算法针对“当前”统计模型必须预设加速度极值和机动频率的问题,提出一种加速度方差和机动频率在线同步自适应方法,建立改进的“当前”统计模型机动目标跟踪算法;针对在线自适应方法计算量大的问题,结合采样周期的大小与目标机动特性的关系,引入变采样率方法。仿真结果表明,与传统“当前”统计模型相比,改进的“当前”统计模型机动目标跟踪算法能显著提高对不同机动强度目标的跟踪精度;变采样率方法通过减少采样点数,节省了系统资源,提高了跟踪实时性;所提算法将两者结合,用传统的“当前”统计模型1.5～2倍的平均采样周期得到了更小的位置均方根误差,实现了用单模型方法同时改善跟踪精度和实时性的目的。     

The Chinese experience: The impact of financial restatements on firm value and its implications on the investigatory practices of regulators

We examine the relationship between restatements of prior period financial results and firm value in China. This relationship is relevant to the millions of global investors who purchase Chinese equity securities because Chinese regulatory authorities must focus on the restatement events that, in their judgment, most warrant investigation. We recommend that they focus their attention on restatement announcements (and the firms that announce them) that possess the characteristics that most impact firm value.Prior studies of the American equity markets found evidence of a relationship between the nature of the restatement announcements and firm value, as well as evidence that core account adjustments and high-magnitude adjustments affect firm value more than noncore account adjustments and low-magnitude adjustments. However, based on a sample of Chinese listed firms that made corporate announcements that appeared in the Asian press between 2003 and 2011, we only find mixed evidence in the Chinese equity markets in support of the former relationship, and no evidence at all in support of the latter relationship.In other words, restatement announcements in China do not impact firm value to the same extent, and in the same manner, as restatement announcements in America. Chinese regulators must thus develop policies that are unique to the Chinese markets in order to effectively prioritize their oversight activities on firms that issue restatement announcements.What factors should be considered by Chinese regulators? We identify a collection of corporate governance variables, as well as a smaller collection of financial variables, that are significantly associated with decreases in firm value. We also develop a set of regression analyses that utilize these variables to explain a significant portion of the variability of firm value during the sample period. Interestingly, however, we find no evidence that the growth patterns of the firms are significantly associated with changes in firm value.Using this evidence, we recommend the development of a model of regulatory guidance that is customized for the unique characteristics of the Chinese equity markets. We believe that this model can help Chinese authorities focus their attention on specific restatement announcements that most impact firm value.     

长历时暴雨强度公式的推求方法

近年来,随着极端暴雨事件的出现,导致城市内涝灾害频繁发生,原有降雨历时仅为2h的市政排水设计暴雨强度公式已无法满足城市暴雨设计的需求,因此就要延长暴雨采样历时,推求出长历时(24h)暴雨强度公式。针对以上问题,根据北京市提供的52a(1961-2012)原始降雨资料并进行数字化处理,结合水利的长历时特点,采用兼顾市政排水,水利排涝,内涝防治的采样方法,应用P-Ⅲ分布曲线进行频率分析后采用6种经典方法推求暴雨强度公式的参数值,优选出误差最小且满足规范要求的暴雨强度公式参数值,进而推求长历时暴雨强度公式,在此基础上与短历时暴雨强度公式比较,分析两者的差异,为城市雨水排除规划设计提供科学依据和参考。