Design of a novel adaptive inventory control system based on the online identification of lead time

In this paper, an adaptation method for the online identification of lead time is incorporated in production–inventory control systems. Based on the lead time estimate, the tuning parameters are updated in real time to improve the efficiency of the system. Combination of the adaptive scheme with a proportional control law is able to eliminate the inventory drift that appears when the actual lead time is not known in advance or when it varies with time. A detailed analysis is provided for the proposed production–inventory system, including a stability analysis and the quantification of its bullwhip effect. Several examples and comparison with state-of-the-art alternative approaches illustrate the efficiency of the system.     

石油价格波动规律及其预警识别体系研究

石油价格波动及预警识别理论是研究石油价格在内外因素影响下的变化以及由变化程度映射出的警戒状态及其响应机制的理论。现今主流的石油价格波动理论基本以石油价格量为唯一研究基础.相应的预警识别体系亦与之相附和。就研究效果而言其直观度较高,但预测准确性较弱。同时预警准值的确定缺乏依据且识别体系简单。本文在沿袭现有油价量为基准的研究方法的同时。创新性地提出以相对率表达价格波动,并以此为基础构建预警识别体系。而警限值亦创造性地运用分位数法确定。并对传统的专家法的合理性作了科学验证以及优化。价格调控依据是波动率,调控基础对象是价格量,价格量的回归使波动平抑后则实现调控目标。     

苏里格气田苏54区块气水分布特征分析

在地层水化学分析、气水层的识别的基础上,对苏里格气田苏54区块气水的分布特征及分布规律开展深入研究。区块东部基本不产水,其余区域均有地层水的存在,并且在一定程度上具有连片分布的特征。2012年在东部筛选不产水的区域集中,Ⅰ+Ⅱ类井比例达到72.0%,平均无阻流量10.6×104m3/d,2口水平井试气均达百万方,开发效果良好。     

岩屑图像录井技术在海拉尔盆地的应用

为提高海拉尔盆地油气水层识别和岩性识别能力,进行了岩屑图像录井技术现场试验。阐述了岩屑图像录井技术的技术原理和特点,并对试验过程中的技术应用效果进行了总结分析,同时进行了经济效益初步评价,为岩屑图像录井技术在海拉尔盆地的推广应用提供可靠依据。     

The 2020 Pandemic: Economic repercussions and policy responses

This paper analyses the economic and financial repercussions of the 2020 COVID‐19 pandemic. It argues that the pandemic has inflicted serious injuries to the labor force but has not damaged the physical capital stock. Therefore, the resolution policies of this crisis ought to be carefully tailored to supporting structural adjustments to the labor market. The analysis asserts that the impact of the pandemic crisis is exacerbated by the identification gap between the unobserved and the officially reported cases of COVID‐19. The gap increases financial risks, including market‐, credit‐, default‐, and foreign exchange risks.     

CEO organizational identification and firm cash holdings

As the decision-makers and implementers of a firm’s financial strategy, executives play a critical role in cash holding activities, and their psychological characteristics have a major impact on cash holdings. This paper investigates the association between CEO organizational identification and firm cash holdings. The empirical results show that CEO organizational identification is negatively associated with firm cash holdings, and the negative association is more pronounced when the level of financial development is higher and economic uncertainty is lower. Further analysis reveals that the higher a CEO’s organizational identification, the higher the firm’s R&D investment and capital expenditure, and high CEO organizational identification can increase the value of firm cash holdings. Overall, our findings supplement the literature on organizational identification and cash holdings, and on the effect of executives’ psychological characteristics on corporate financial decision-making.     

诉讼效率的经济学分析

诉讼效率应当使全部的诉讼资源在司法机关之间和诉讼参与人之间得到均衡分配。诉讼效率的物质表现是诉讼资源的配置状况。高昂的诉讼机会成本经常使人们不选择诉讼而选择其他手段;诉讼效率成本是诉讼效率物质体现的种种消费,其收益是定纷止争的结果及定纷止争本身对整个社会秩序带来的效益。探求诉讼效率最佳状态可以转化为解决诉讼边际成本与边际收益如何处在相等点上的问题。     

Adult Outcomes for Children of Teenage Mothers

Using data from the British Household Panel Survey, this study examines the relationship between several outcomes in early adulthood (e.g. education, inactivity, earnings and health) and being born to a teenage mother. Besides standard cross‐sectional multivariate regression estimates, we also present evidence from non‐parametric estimates and from estimates that account for unmeasured family background heterogeneity by comparing siblings born to the same mother who timed their births at different ages. Regardless of the econometric technique, being born to a teenage mother is usually associated with worse outcomes. An important channel of transmission of this adverse effect is childhood family structure, which plays a more powerful role than childhood family poverty. Albeit smaller, some of the detrimental effects are also found for children of mothers who gave birth in their early 20s.     

揭开神秘的面纱：民事诉讼标的识别理论的解放

诉讼标的是民事诉讼法学者必须经过的一座桥,然这一重要概念却长期处于不休的学说论争中,这给民事诉讼理论体系的安定性带来了不小的冲击。因此,诉讼标的理论需要在长期的学说论争中妥协,从而寻获一条相对合理的解释路径。对于诉讼标的的认识应正本清源,从其设定本旨出发去探寻和了解其真意,进而合理择定其识别基准。同时,诉讼标的的识别基准还应辅以虑及一国之民事司法环境。在这样的前提下,旧实体法说是一种相对合理且适切的选择。虽然旧实体法说有其固有缺陷,但可以通过程序法和实体法的互动与协作,以制度联动的方式帮助旧实体法说理论脱困,使其在理论阐释和司法实践中发挥着双重功效与机能。