基于IP分布式MSC的CDMA2000系统A接口设计与实现

针对传统集中式移动交换中心(MSC)容量小、安全性低、不易扩展的不足,基于IP技术和软交换技术,提出了一种分布式MSC架构.在此架构下对A接口协议进行了分析并给出了基于IP的实现方案:兼顾TCP的可靠性和UDP的简洁性定义了承载A接口中的信令和业务的一个增强性UDP协议(EUDP).此外,也描述了分布式MSC负荷分担的选择原则:轮选、处理最近和资源最近;最后以8 kbit/s语音业务为例,对基于IP传输语音业务的带宽需求进行了简单分析.实践表明,该方案不仅提高了系统的经济性,也改善了网络容量扩展和新业务提供的灵活性.     

MSC POOL组网优势和问题分析

核心网控制节点以池纽方式工作能为运营商提供包括提高投资利用率，提高网络性能，简化网络规划等很多好处。本文简要阐述了MSCPool组网的原理，MSCPool组网带来的优势，分析了MSCPooI组网过程中的需要关注的常见问题。     

Eco-labels and product longevity: The case of whitefish in UK grocery retailing

In recent years, eco-labeling has become an increasingly used tool to signal sustainable sourcing of (sea-) food. While the literature has focused on price premiums associated with the labels, it is noted in this paper that eco-labels can also contribute to profitability by reducing cost, e.g. through longer product lifespans. Hence, eco-labels can be beneficial in a supply chain even without a price premium. This study applies duration analysis to explore whether two eco-labels (the MSC label of the Marine Stewardship Council and a line-caught label) influence product longevity of whitefish products in eight different grocery retailers in the UK. The results show that MSC labeled products have a 64.7% lower risk of being withdrawn from the shelves compared to non-MSC products, while products with the line-caught label have a 32.8% lower risk of being withdrawn than products without this label. The results also indicate that the influence of the eco-labels on product longevity vary considerably between the retailers.     

韩国多用途卫星(KOMSAT-2)的系统组成及其数据应用

本文概述了KOMPSAT-2卫星的地面管理控制系统、图像接收和处理系统、卫星搭载的有效荷载、卫星数据总线和数据产品特性及其应用,并对KOMPSAT系列卫星的发展和数据产品的应用前景进行了展望。     

MSC Pool组网应用浅析

本文简单的对MSC Pool技术进行介绍,对MSC Pool内业务实现的流程进行了描述.河北移动已完成对MSC Pool的组网试点工作,通过对试点网络运行指标的分析,证明了MSC Pool种组网方式是运营商优化网络资源的整体解决方案之一.     

民用飞机动着陆响应载荷工程计算方法

文章通过分析中国民航适航条款25.471,25.473,25.479,25.481对民用飞机动着陆响应载荷计算的建议和要求,提出一种基于MSC.Nastran软件的民用飞机机体动着陆响应载荷工程计算方法。文章介绍了动着陆载荷响应计算背景,明确动着陆载荷响应计算的要求以及动着陆载荷计算流程的各个步骤,利用经典瞬态响应分析方法对动着陆响应载荷进行分析,并在MSC.Nastran软件平台上实现了动着陆响应计算以满足工程计算要求,为民用飞机动着陆静强度分析工作和动着陆疲劳分析提供支持。     

MSC POOL技术在移动软交换组网中的应用

MSCPOOL在移动软交换组网应用中非常重要,它的技术是未来软交换发展的趋势。本文说明MSCPOOL的应用及优缺点等。     

檩条体系作为纵向支撑的稳定性分析

针对南通体育馆大跨空间钢屋架设计过程中考虑檩条的纵向支撑作用，用MSC．Patran建立檩条体系的有限元模型，并通过MSC．Nastran求解器对檩条体系在受纵向水平压力时的稳定性进行有限元分析。比较在不同工况下檩条的变形情况。     

Is It Worth Getting Labeled? The Case of MSC-Certified Seafood

Research has examined consumers’ attitudes toward ecolabels, but there is a lack of research examining whether niche ecolabels give a competitive advantage in consumer markets. The authors aim to fill this gap by exploring the four conditions of market success (evidence of price premiums, market share, access to retailers, and elasticities) established in the literature. Three varieties of MSC-certified fish are studied. Differences are observed across the three varieties that lead to the following conclusions: MSC-labeled products do not systematically sell at a premium; price has an inelastic effect on the demand of certified national brands, but increased distribution has a very elastic effect on demand; and MSC-labeled products do not experience seasonal effects. The consumer market is responding favorably to the label, but ecolabeled fish is in an introductory stage. Price premiums vary; the retailer’s brand is playing a prominent role.