基于自动补货技术开发的便利店门店库存管理模型

本文针对当前我国便利店门店存在库存管理不合理的问题．运用了经典预测技术和数据分析知识，引用了SPSS数据分析软件的P—P概率图．结合当前最新发展的库存管理思想。为门店开发了支持自动补货系统的上下限库存管理模型．从而完善了门店的库存管理系统。     

Probability theory in fuzzy sample spaces

This paper tries to develop a neat and comprehensive probability theory for sample spaces where the events are fuzzy subsets of The investigations are focussed on the discussion how to equip those sample spaces with suitable -algebras and metrics. In the end we can point out a unified concept of random elements in the sample spaces under consideration which is linked with compatible metrics to express random errors. The result is supported by presenting a strong law of large numbers, a central limit theorem and a Glivenko-Cantelli theorem for these kinds of random elements, formulated simultaneously w.r.t. the selected metrics. As a by-product the line of reasoning, which is followed within the paper, enables us to generalize as well as to bring together already known results and concepts from literature.Acknowledgement. The author would like to thank the participants of the 23rd Linz Seminar on Fuzzy Set Theory for the intensive discussion of the paper. Especially he is indebted to Professors Diamond and Höhle whose remarks have helped to get deeper insights into the subject. Additionally, the author is grateful to one anonymous referee for careful reading and valuable proposals which have led to an improvement of the first draft.This paper was presented at the 23rd Linz Seminar on Fuzzy Set Theory, Linz, Austria, February 5–9, 2002.     

企业信用管理制度可靠性及有效性探讨

笔者认为企业信用管理经典计算存在严重缺陷,不适合企业应用;本文通过典型案例分析,讨论企业授信制度建设、存在风险以及补救措施;对确定客户信用额度的各种方法进行分析比较并讨论其适用性及有效性。通过分析企业必须面对而又难以把握的企业信用管理核心问题,结合实际、层层深入进行探讨,为企业信用管理决策提供指导意见。     

建设城市中小型污水处理厂的方案选择

文章首先对城市污水处理厂二级处理的工艺选择及设计方案进行了探讨然后对经常采用的处理工艺进行了技术经济比较。     

农民增收的极限约束与跨跃路径

从长期看,农民增收有两个极限性约束条件:一是收入增长速度不能高于或者相当于城市居民收入增长速度;二是农民收入增幅不能高于农村财富的增幅。但是农民收入又不能不维持大幅度的增长,否则会影响国民经济的增长,影响政治社会的稳定。要解决这对矛盾,必须通过农村内部挖潜,拓宽内源性增收空间;调整束缚增收的制度;寻找和扩大外源性增收渠道。     

Order aggressiveness and order book dynamics

In this paper, we study the determinants of order aggressiveness and traders’ order submission strategy in an open limit order book market. Applying an order classification scheme, we model the most aggressive market orders, limit orders as well as cancellations on both sides of the market employing a six-dimensional autoregressive conditional intensity model. Using order book data from the Australian Stock Exchange, we find that market depth, the queued volume, the bid-ask spread, recent volatility, as well as recent changes in both the order flow and the price play an important role in explaining the determinants of order aggressiveness. Overall, our empirical results broadly confirm theoretical predictions on limit order book trading. However, we also find evidence for behavior that can be attributed to particular liquidity and volatility effects.

机场净空区超高障碍物风险性分析

针对机场净空区超高障碍物较多的现象,对飞机飞行航迹进行了测试,提出了净空安全系数的概念,结合实际测试数据,应用统计分析原理,得出了净空安全系数的概率分布规律.以安全系数的分布规律为基础,对不同超高障碍物的风险性进行了分析,并提出了按照不同安全系数划分障碍物限制高度的思路,最后给出了不同类型机场净空安全系数的建议值,对各类机场净空管理和障碍物限制面的确定具有重要参考价值.     

价格涨跌幅机制对市场波动及换手率的影响

文章调查了价格限制机制对股票价格波动以及市场流动性的影响。首先刻画了实行价格涨跌幅限制后股票价格的变化特征,研究价格限制机制对股票价格波动的影响;随后在考虑延续冲击效应因素的基础上,通过对引入价格限制机制后投资者总成本的考察,研究了该机制对市场流动性的影响。文章结论认为,股票价格涨跌幅限制机制的引入,将增加股票市场的波动性,并且会导致投资者心理所能承受的潜在收益、损失量减小,使投资者更加频繁地买卖股票．从而增加市场换手率,进而提高整个市场的流动性。     

RFID技术在国际快件物流中的应用

近年来,RFID技术被广泛应用在物流、交通、医药等领域,而且发展非常迅猛。针对快件物流行业对通关速度、快件安全等方面提出的需求,对RFID技术在快件物流中的应用模式作了介绍,并介绍了射频识技术(RFID)在某国际快件口岸中心的快件通关试点经验。     

“快速通关”贸易促进效应的实证分析

在低关税的时代,快速通关很可能是打破贸易壁垒,推动国际贸易发展的重要手段。文章从四个方面总结了快速通关对国际贸易的影响机制,并基于2008-2010年113个国家相互之间的出口数据,使用 Heckman两步选择模型进行了实证研究。结果显示,快速通关对贸易参与和贸易规模都有着显著的促进作用,从多个角度进行稳健性检验后,该结论依然成立。快速通关可以通过需求偏好效应、成本效应与全球化生产网络效应和遏制日益强化的非关税贸易壁垒的负面效应,使得多边谈判所形成的关税降低的效应得以真正发挥。此外,文章还发现,自由贸易协定的建立,提升了通关效率与边境管理的透明度,进而提高了国家间的贸易量。文章的研究结论对于理解目前中国建立自由贸易区以及实施在贸易谈判中主导快速通关的措施或建立条款,打破技术贸易壁垒具有重要的意义。