Improved Methods for Estimating Flood Depth Exceedances Within Storm Surge Protection Systems

Contemporary studies conducted by the U.S. Army Corps of Engineers estimate probability distributions of flooding on the interior of ring levee systems by estimating surge exceedances at points along levee system boundaries, calculating overtopping volumes generated by this surface, then passing the resulting volumes of water through a drainage model to calculate interior flood depths. This approach may not accurately represent the exceedance probability of flood depths within the system interior; a storm producing 100‐year surge at one point is unlikely to simultaneously produce 100‐year surge levels everywhere around the system exterior. A conceptually preferred approach estimates surge and waves associated with a large set of storms. Each storm is run through the interior model separately, and the resulting flood depths are weighted by a parameterized likelihood of each synthetic storm. This results in an empirical distribution of flood depths accounting for geospatial variation in any individual storm's characteristics. This method can also better account for the probability of levee breaches or other system failures. The two methods can produce different estimates of flood depth exceedances and damage when applied to storm surge flooding in coastal Louisiana. Even differences in flood depth exceedances of less than 0.2 m can still produce large differences in projected damage. This article identifies and discusses differences in estimated flood depths and damage produced by each method within multiple Louisiana protection systems. The novel coupled dynamics approach represents a step toward enabling risk‐based design standards.     

WIP inventories in the simultaneous determination of optimal production and purchase lot sizes

This paper studies an integrated production and purchasing lot sizing model with work-in-process WIP inventory. In this model, the single product is made in a multiprocess manufacturing system. The raw materials are procured from outside sources and are converted gradually into the product. A solution procedure is developed to simultaneously find the optimal lot sizes for the product and its raw materials and the corresponding total relevant cost. It is shown that if the cost of WIP inventory is considered in the production lot size computation, the optimal lot sizes of the product as well as those of the raw materials could be altered significantly.     

消费者对转基因食用油的认知和购买行为分析———基于无锡市消费者的调查数据

文章以无锡市348名消费者的调查数据为依据,分析消费者对转基因食用油的认知水平,并通过构建Logistic回归模型,分析影响消费者对转基因食用油购买行为的主要因素。调查结果表明,44％的消费者对是否购买转基因食用油持否定态度。在对影响转基因食用油购买行为的因素分析中,性别、收入、受教育程度、家中是否有未成年人等变量均影响了消费者对转基因食用油的购买行为,其中以月人均收入相关性最为显著。     

Purchase timing models in marketing: a review

In this work we review various approaches to modeling the purchase behavior of consumers in marketing. Special emphasis is given to the timing of purchases. We also discuss in detail a new approach which models the hazard function in a flexible dynamic way thus yielding self-exciting phenomena. In particular our approach is able to incorporate seasonal and advertising effects and past purchase decisions. The method is applied to panel data for fast moving consumer goods.     

论离校未就业高校毕业生就业促进中政府的购买行为

政府购买就业服务对促进离校未就业高校毕业生就业非常必要,但在离校未就业高校毕业生就业促进实践中存在着诸多定位偏差,主要表现为购买行为“内部化”、购买程序“随意化”、购买标准“模糊化”和购买监管“缺失化”等几个方面。政府购买就业服务行为亟待优化,提倡从构建多元供给格局、明确多方责任关系、完善购买服务流程和引入多方评估机制等多角度来选择优化路径。政府购买行为的着力点应放在为何购买、向谁购买、购买什么以及如何购买等方面,以促进离校未就业毕业生就业服务的有效开展。     

网上图书采购的现状与优势

网络环境的改变、信息技术的广泛应用,使图书馆的采购工作受到重大影响,图书馆的采购工作将拓宽到网络环境中去。标准规范的编目MARC数据的传递和下载以及大量网上书店的出现,使得图书馆的书刊采购变为现实。未来图书馆应该实行网上采购这一模式。     

高校图书馆中文图书采购新模式探索

通过分析广东培正学院图书馆在专升本评估阶段中文图书采购方面的实践经验,探索传统采购模式的不足及中文图书采购的新模式。     

Code–convergent borrowing in Louisiana French

The nature of lexical and structural borrowing has been at the forefront of sociolinguistic debates for many years. This study analyzes bilingual lexemes and morphemes of English–origin loanwords from a Louisiana corpus of twenty–two French/English speakers. French Louisiana, however, has been undergoing language shift from French to English for three generations and, as a consequence, language dominance is in a parallel state of shift. This competing dominance produces borrowings characterized by a range of phonological integration coupled with bound morphemes from both languages. These data suggest that examining borrowing beyond the word level reveals a highly complex interplay of often competing and overlapping grammars.     

跨国并购的信息经济学根源

在过去的 10年中 ,国际直接投资增长的大部分是通过跨国并购而不是通过新建直接投资实现的 .我们可以清楚地看到 ,跨国并购正以一种增长性的姿态呈现在我们面前 .与新建直接投资相比 ,跨国并购为何发展如此迅速 ,学术界观点不一 .文章从信息经济学的角度 ,利用一个信息不对称的模型对跨国并购的迅速发展做了详细的分析 .     

不完全市场经济条件下我国企业合并会计处理方法选择

2006年财政部颁布了38项具体会计准则,新准则在充分结合目前我国会计环境的基础上,实现了与国际惯例的趋同。文中在阐述我国不完全市场经济的基础上,深入分析了新会计准则在企业合并中会计处理方法的选择,对权益结合法和购买法进行了对比分析,并进一步给出了企业合并会计处理方法选择方面的建议。