资源型城市绿色转型绩效评价——来自中国114个地级市的检验

展开绿色转型绩效评价对资源型城市的经济转型与绿色发展意义重大。借鉴可持续发展理论,构建资源型城市绿色转型绩效的综合评价指标体系,利用主成分分析法对114个资源型地级市的绿色转型绩效进行测度,继而采用Dagum基尼系数考察了不同类型城市的绿色转型绩效差距及其来源。结果表明：首先,资源型城市的绿色转型取得了显著成效,转型绩效高值城市集中分布于我国北部和东部沿海地区,绩效的高低主要依赖于经济转型和社会转型效果;然后,不同类型城市的经济、社会和环境转型发展存在周期性特征,但由于四类资源型城市的转型途径不同,转型效果也存在差异;最后,城市绿色转型总体差距呈现出缩小的趋势,成长型和再生型城市的组内差距整体都呈现扩大的趋势,成熟型和衰退型城市组内差距呈现缩小的趋势,成长型和再生型城市之间的差距最大,均值为0.1585,成熟型和衰退型城市之间的差距最小,均值为0.0858,组内差距的缩小是总体差距缩小的主要因素。     

煤矿通风研究

文章讨论了瓦斯煤矿安全生产的通风问题,使用微分方程建模得出局部通风机功率与掘进工作面瓦斯浓度的关系;根据国家《安全煤矿安全规程》确定了各巷道风量的允许范围,以巷道瓦斯浓度与断电浓度之间的差距为目标函数,在考虑了巷道的漏风系数情况下,通过数学规划求出目标函数的最大值,得到理论最优通风量,再引入矿井瓦斯涌出不均衡系数与矿井通风系数对理论结果进行了修正。     

贡献系数及在山东省区域经济评价中的应用

区域经济研究中,对不同地区的经济发展状况和相对重要性进行比较分析,是一种常用的研究方法,然而,选择什么指标来作为评价的依据,才能保证这种比较的准确性和公允性,是一个非常值得认真思考和深入探讨的问题。本文提出了用贡献系数来准确反映地区之间经济发展差异性及影响因素     

一种改进的人力资源价值计量方法

人力资源价值计量问题是人力资源会计的一个难点。对已有的人力资源价值计量方法进行了简单的评述,并在考虑非货币因素的基础上,对未来工资报酬折现法进行了改进,使得新的计量方法更具有合理性。     

Asset price momentum and monetary policy: time-varying parameter estimation of Taylor Rules

In this article, we consider two new independent variables as inputs to the Taylor Rule. These are the equity and housing momentum variables and are introduced to investigate the potential usefulness of these two variables in guiding the Fed to lean against potential bubbles. Such effectiveness cannot adequately be evaluated if the Taylor Rule estimation follows the standard regression methodology that has been criticized in the literature to be econometrically incorrect. Using a time-varying parameter estimation methodology, we find that equity momentum as an input in the Taylor Rule does not contribute to changes in Fed Funds. However, the housing momentum plays an important role econometrically and can be a useful tool in setting Fed Funds rates.     

综合传热系数K值试验装置的研制与应用

综合传热系数K值是隔热箱体设计的重要参数,研制能快速自动检测K值的试验装置可准确掌握箱体的隔热性能,大大提高产品的开发效率。文章重点介绍了K值快速试验装置的系统设计方案、测试原理和应用实例。经验证,其运行稳定可靠,试验结果准确,使用效果良好,具有较强的实用价值。     

单车多品种货物配装问题的模型与算法研究

针对货车装栽率低下的现状，建立模型时考虑货车的类型、体积、载重、客户优先级等约束，给出单车多货配装问题进行优化的方法和步骤，并结合理论设计算法。     

我国城镇居民收入分配差距探源

分析了当前城镇居民个人收入分配的现状 ,探讨了收入分配差距拉大的原因 ,指出了城镇居民收入分配中存在的问题 ,给出了解决对策     

Does Trade Openness Affect the Speed of Output Convergence? Some Empirical Evidence

In this paper we develop flexible techniques for measuring the speed of output convergence between countries when such convergence may be of an unknown non-linear form. We then calculate these convergence speeds for various countries, in terms of half-lives, using a time-series data-set for 88 countries. These calculations are based on both nonparametric kernel regression and ‘fuzzy’ regression, and the results are compared with more restrictive estimates based on the assumption of linear convergence. The calculated half-lives are regressed, again in various flexible ways, on cross-section data for the degree of openness to trade. We find evidence that favors the hypothesis that increased trade openness is associated with a faster rate of convergence in output between countries.     

Agreement between an isolated rater and a group of raters

The agreement between two raters judging items on a categorical scale is traditionally assessed by Cohen's kappa coefficient. We introduce a new coefficient for quantifying the degree of agreement between an isolated rater and a group of raters on a nominal or ordinal scale. The group of raters is regarded as a whole, a reference or gold-standard group with its own heterogeneity. The coefficient, defined on a population-based model, requires a specific definition of the concept of perfect agreement. It has the same properties as Cohen's kappa coefficient and reduces to the latter when there is only one rater in the group. The new approach overcomes the problem of consensus within the group of raters and generalizes Schouten's index. The method is illustrated on published syphilis data and on data collected from a study assessing the ability of medical students in diagnostic reasoning when compared with expert knowledge.