Downside Risk-Aversion Analysis for a Single-Stage Newsvendor Problem

We extend the classical newsvendor problem by introducing a downside risk constraint from the perspective of inventory control. At the beginning of a replenishment period the newsvendor will place an order, then he will review the inventory level at the end of the period. If the inventory level is positive then he will bear the holding cost and if the inventory level is negative then he will bear the backorder cost. The optimal order quantity has a simple form. We analyze the form of the optimal order quan-tity when we restrict that the probability that the cost level is larger than or equal to a fixed cost constant is less than a fixed value of probability. At last, we analyze the case that the fixed cost constant is equal to the expected cost.     

议美国俚语

就俚语在美国英语中占重要地位,它广泛应用于电影、电视及报刊杂志中,文章对美国俚语的起源和特点作一探讨。     

基于容斥原理的群Sn中累计计数问题的探讨

讨论了容斥原理及其推广，在此基础上研究了在限制条件下对称群Sn中累计计数问题及其推广。     

AN EXPONENTIAL INEQUALITY FOR AUTOREGRESSIVE PROCESSES IN ADAPTIVE TRACKING

A wide range of literature concerning classical asymptotic properties for linear models with adaptive control is available, such as strong laws of large numbers or central limit theorems. Unfortunately, in contrast with the situation without control, it appears to be impossible to find sharp asymptotic or nonasymptotic properties such as large deviation principles or exponential inequalities. Our purpose is to provide a first step towards that direction by proving a very simple exponential inequality for the standard least squares estimator of the unknown parameter of Gaussian autoregressive process in adaptive tracking.     

Data Location Mechanism in Agent-Based Autonomic Storage Systems

This paper introduces agent-based methodology to build a distributed autonomic storage system infrastructure, and an effectively negotiation mechanism based on agent is applied for data location. We present Availability-based Data Allocation （ADA） algorithm as a data placement strategy to achieve high efficient utilization of storage resources by employing multiple distributed storage resources. We use Bloom filter in each storage device to track the location of data. We present the data lookup strategy that small size of read request is handled directly, and large size of read request is handled by cooperation with storage devices.The performance evaluation shows that the data location mechanism is high available and can work well for heterogeneous autonomic storage systems.     

炼油化工装置取消部分机泵的冷却水是可行的节能途径

主要针对MTBE装置 ,通过适当调整工艺 ,取消泵P2 0 2冷却水的过程进行阐述 ,说明在炼油化工装置中 ,调整工艺、取消部分机泵的冷却水是可行的节能途径之一     

二叉树的生成算法与字符串的输出

研究了二叉树生成算法及利用生成的二叉树输出字符串组的问题，对于给出的不同字符，可根据要求输出由这些字符生成的字符串组。此算法因为采用二叉树及栈的数据构造，可以节省计算机的存储单元，提高输出速度，作为一个实际应用，实现了阿拉伯语的构词分析.     

Linear Conjugate Boundary Value Problems

We discuss the linear conjugate boundary value problems on the unit circle and the real axis. We obtain some Fredholm integral equations. Using thess equations we discuss the solvable conditions on these problems and we also give a direct method for the extension problems on the real axis.     

连续接触齿轮的流量率计算公式的探讨

本文导出了一个简化的流量率公式,并利用这个公式分析了流量率与齿形及齿廓参数的关系。并提出了一些提高流量率的方法。