Eating at School: How the National School Lunch Program Affects Children's Diets

This article examines the impact of participation in the National School Lunch Program (NSLP) on children's dietary intake at lunchtime and over 24 hours. Using a fixed effects model to control for selection bias, we find that NSLP participation leads to increased 24-hour intake of six vitamins and minerals—calcium, magnesium, phosphorus, zinc, vitamin B12, and riboflavin—as well as dietary fiber. Participation also leads to a trade-off between children's intake of dietary fat and added sugars whereby participants have higher intakes of dietary fat than nonparticipants but lower intakes of added sugars.     

交换式虚拟局域网(VLAN)技术在校园网中的应用

本文阐述了局域网技术的发展和虚拟局域网（VLAN）技术的特点，着重介绍了虚拟局域网技术在校园网中的应用及配置方案，最后介绍了一运用VLAN技术的校园网实例。     

401（k）计划—最流行的企业补充养老保险形式

对美国最流行的企业补充养老保险—— 4 0 1(k)计划的运行机制、优缺点和设计模式做了详细的介绍和评述 ,指出了 4 0 1(k)计划对中国养老保险制度改革的启示∶虽然属于企业补充养老保险 ,但是“基金制”的运作模式势必要导入我们的养老保障系统。分析了 4 0 1(k)计划在中国的适用性问题。     

AWGN信道下TH-PPM UWB通信系统性能分析与仿真

首先介绍了TH—PPM UWB信号，然后从理论上对加性高斯白噪声（AWGN）信道下系统的性能进行了分析，包括误码率分析和系统容量分析，最后对系统的误码率和接入用户数进行了仿真比较。结果表明，重复码长度、脉冲重复时间和用户数目的选取对系统的误码率都有较大的影响，同时，系统容量与输出信噪比和数据传输速率有关并趋于定值。     

Applying fuzzy quality function deployment (QFD) to identify solutions of service delivery system for port of Kaohsiung

The main purpose of this paper is to apply fuzzy quality function deployment (QFD) model to identify solutions of service delivery system (SDS) for port of Kaohsiung from the viewpoints of customers. At first, to facilitate the main issue of the QFD problem, however, the ‘what’ question of customer needs and ‘how’ problem of the services have to be made, which are two major components and be emphasized on the house of quality (HOQ) matrices. In conjunction with fuzzy sets theory, hence, the systematic procedures using fuzzy QFD were proposed in this paper. Subsequently, a case study for port of Kaohsiung demonstrated the systematic appraisal process for identifying solutions of SDS. The results of empirical study show that (1) 10 key factors are deemed as to have priority to improve the quality of SDS for Kaohsiung port; and (2) eight feasible solutions for improving service quality performance are identified. Moreover, it is suggested that port Authority of Kaohsiung should listen attentively the voice of customers and emphasize on exploiting these customer requirements effectively. And then develop the ‘how’ issues of profiles of solutions, which should continuously strengthen the perspectives of customer, internal business process, and learning and growth, respectively.     

PLM education in production design and engineering by e-Learning

These days more attention is being paid to Product Lifecycle Management (PLM) using a technique for managing total product planning, design, manufacturing, sales, and disposal. We researched business processes and education curriculum of the PLM system in manufacturing businesses. We designed the curriculum of PLM education and developed part of a lesson. Most importantly, e-Learning is shown to be an effective tool for achieving educational objectives. We found that not only knowledge and theory but also practical education methods using case studies in an e-Learning environment are necessary for human resources to develop effective PLM.     

Optimal safety stock levels of subassemblies and manufacturing components

In order to control the time to market and manufacturing costs, companies produce and purchase many parts and components before receiving customer orders. Consequently, demand forecasting is a critical decision process. Using modular product design and super bills of materials are two effective strategies for developing a reliable demand forecasting process. They reduce the probability of stockouts in diversified production contexts. Furthermore, managing and controlling safety stocks for pre-assembled modules provide an effective solution to the problem of minimizing the effects of forecast errors. This paper develops, evaluates, and applies innovative cost-based analytical models so that the optimal safety stock of modular subassemblies and components in assembly to order and manufacturing to order systems, respectively, can be rapidly quantified. The implementation of the proposed models in two industrial case applications demonstrates that they significantly reduce the safety stock inventory levels and the global logistical cost.     

基于模式识别的短波ALE系统8FSK信号解调

根据美军标MIL-STD-188-141A的规定，8FSK信号的解调是短波自动链路建立(ALE)系统的一项关键技术。通过把图像分割和聚类分析方法应用于8FSK信号的频谱分析，提出了基于模式识别的解调算法。测试结果表明，该算法对白噪声不敏感。     

刍议企业并购后的整合

企业并购后的整合是企业并购成功的关键 ,而且是比完成并购交易要复杂和困难的工作。根据并购后整合的策略 ,提出了一个并购后整合的程序模型 ,并且分析了导致整合失败的可能原因 ,以期对并购后的整合有新的认识。