Some Properties of Past Entropy and their Applications

In the context of information theory, measure of uncertainty in past lifetime distribution has been proposed by Di Crescenzo and Longobardi (J Appl Probab 39:434–440, 2002). In this paper, we study some ordering and aging properties in terms of past entropy (based on past lifetime) and develop some characterization results. Some discrete distribution results are also addressed here.     

中国经济增长的可能性:一种基于修正的索洛模型的估算

索洛模型这一经典的经济增长模型有它无可比拟的优点,但对于考察中国问题来说,也有一些内在缺陷.本文根据中国经济增长的特征事实,对索洛模型做出了一些修正,并据此对中国经济增长的可能性进行了重新估算.     

城市轨道交通直流牵引供电系统接触网残压

对于城市轨道交通来讲,在运行的过程中,直流牵引供电系统是使用最为主要的部件之一。在该系统应用的过程中,接触网残压问题是较为严重的问题,也是当前所出现问题当中比较普遍的一种。对于直流牵引供电系统来讲,当出现接触网残压问题时,可能会对人的生命安全造成严重威胁,同时也会使检修施工和接触网送电保护闭锁等相关工作受到影响,严重拖慢工作进度。因此,论文通过测试、仿真分析和模拟验证等方法,对城市轨道交通直流牵引供电系统接触网残压问题进行了研究与论述。     

Behind rising inequality and falling growth

This paper investigates why the upsurge of top income shares has coincided with economic slowdowns in the US since the late 1970s. I argue that a fast-growing unearned income from ‘wealth residual’ – the unexplained increase in wealth that is not accompanied by any increase in real output – lies behind them. To support this hypothesis, I measure wealth residual from the national accounts and associated statistics, and then perform a set of panel regressions using a comprehensive panel dataset of the US at the state level. The estimation results demonstrate that the rapid growth of wealth residual during the last four decades has contributed to a co-evolution of fast-growing inequality and falling growth.     

Equity valuation: A survey of professional practice

This paper reports the results of a scientific survey of the equity valuation practices of CFA Institute members with equity analysis job responsibilities. Using an instrument designed to minimize biases in prior valuation surveys and sampling a larger group than in previous studies (13,500 investment professionals, resulting in 1,980 valid completed questionnaires), this paper documents professional practices in the selection of equity valuation approaches, including specific model variations and key input preferences. Important differences in practice were observed across geographies and employer firm types.     

Distribution of residual autocorrelations for multiplicative seasonal ARMA models with uncorrelated but nonindependent error terms

In this paper, we consider portmanteau tests for testing the adequacy of multiplicative seasonal autoregressive moving‐average models under the assumption that the errors are uncorrelated but not necessarily independent. We relax the standard independence assumption on the error terms in order to extend the range of applications of the seasonal autoregressive moving‐average models. We study the asymptotic distributions of residual and normalized residual empirical autocovariances and autocorrelations under weak assumptions on noise. We establish the asymptotic behavior of the proposed statistics. A set of Monte Carlo experiments and an application to monthly mean total sunspot number are presented.     

Debreu’s coefficient of resource utilization, the Solow residual, and TFP: the connection by Leontief preferences

Debreu’s coefficient of resource utilization is freed from individual data requirements. The procedure is shown to be equivalent to the imposition of Leontief preferences. The rate of growth of the modified Debreu coefficient and the Solow residual are shown to add up to TFP growth. This decomposition is the neoclassical counterpart to the frontier analytic decomposition of productivity growth into technical change and efficiency change. The terms can now be broken down by sector as well as by factor input.

基于剩余评价期的经济评价方法研究及在长输管道中的应用

针对传统的内部收益率存在参数条件变化需要对数据进行还原调整,且历史数据缺失时无法使用,或企业管理者不注重历史收益状况的情况,提出了基于管道项目剩余评价期的内部收益率指标,并结合油气长输管道运营实际,分别构建了运营期现金流量均衡、非均衡两种情形下的评价模型,计算分析了不同剩余评价期内部收益率与全评价期基准收益率的对应关系。最后针对某管道企业的3条管道进行了实例测算,对测算结果进行分析和评价。     

市场导向下的催化裂化技术发展

介绍根据市场的需求变化,在原馏分油催化裂化的基础上,陆续开发出的渣油催化裂化,多产气体烯烃的DCC、MIO、CPP技术,适合多产液化气和汽油的MGG、ARGG技术,生产高辛烷值汽油、多产柴油的催化裂化技术,以及同时多产液化气和柴油的MGD等技术,指出催化裂化已经发展成一个技术家族,较好地满足了市场的需求,随着市场需求的变化,催化裂化技术将有新的发展。     

生物聚合物改良玄武岩残积土崩解特性研究

为提高玄武岩残积土的抗崩解性及其边坡水稳性,利用生物聚合物瓜尔胶改良玄武岩残积土。在干湿循环条件下开展不同掺量瓜尔胶改良玄武岩残积土的崩解试验,观察残积土崩解过程,并对残积土改良土崩解系数和平均崩解速率进行测定,分析瓜尔胶掺量及干湿循环次数对玄武岩残积土水稳性的影响。研究结果表明：瓜尔胶可有效增强玄武岩残积土的抗崩解性能,随着瓜尔胶掺量的增加,改良玄武岩残积土的崩解系数和平均崩解速率呈现先减小后增加的特点,在瓜尔胶掺量为1.0%时抗崩解性能最佳;瓜尔胶掺量一定时,改良玄武岩残积土的崩解系数和平均崩解速率随着干湿循环次数的增加呈现增长趋势,当干湿循环次数N=4时,土体崩解率为N=1时的8倍。由此可见,瓜尔胶作为一种新型、环保的残积土边坡防护材料,可有效提升玄武岩残积土的抗崩解性能。研究结果为生态环保处置玄武岩残积土提供了新的思路,可为玄武岩残积土地区边坡工程的绿色发展提供参考。