动态质量功能展开在供应商业绩改进中的应用研究

以动态质量展开为基础,建立了供应商的评价模型.通过模型结果分析,准确预测了顾客需求的趋势,并提出了有效的技术改进措施,对供应商企业业绩改进有现实的指导意义.     

严峻问题——经济、燃油或本、运力、码头运输工人联盟谈判产生了不确定性

今年关于太平洋航线有两个不确定因素，即美国进口量增长将会大大放缓，同时美国出口量会继续增加。因此，几乎所有其他的问题都是不确定的：进口量是否会增长还是会减少？航运公司是否会随着船只规模的增加，而为贸易业务分配更多运力，或者仅仅保持现有运力？他们是否能够成功增加运费以弥补成本的增长？发货人是否同意支付完全不固定的船舶燃油附加费？     

Interval estimation in the calibration of certain trip distribution models

This paper argues for interval, rather than point, estimation when calibrating some variants of the trip distribution “gravity” models. Analytic expressions are derived for the approximate asymptotic covariances of least squares and maximum likelihood estimates of the parameters in the impedance function under a variety of conditions. A comparative numerical example, and an application using migration flows, are also presented.     

Satellite and resort offices in Japan

Environmental and qualify-of-life issues are taking on an increasing social and political significance the world over. Even in Japan, a country so often criticized for its economic-dominated outlook, talk is turning to these issues. Advances in telecommunications and a growing awareness of the need to change how we live and function in an increasingly threatened environment has brought telework to the forefront of the debate on the nature of work and how our cities function.After setting the broad Japanese social context, this paper will look at the progress of telework in Japan to date with especial emphasis on several current satellite and resort office pilots. It will summarize the findings and proposals of several available reports, and will also attempt to identify the overall outlook for telework in Japan.     

闸坝枢纽坝下消能的研究现状及发展综述

本文总结了闸坝坝下消能的几种基本的消能型式并总结了它们各自的消能机理和特点,并简要介绍了几种新型的消能工,并在此基础上提出了相关的一些问题和建议。     

轮轨作用力计算分析及其校核

文章对文献[1]中的车辆-轨道的计算模型以及轮轨接触力迭代求解方法进行了改进。算例分析表明:改进后的数值计算结果与文献[2、3]给出的测试和仿真分析结果具有较好的一致性。此外,利用有限元分析软件ANSYS进行了建模、分析和验证。     

轮箍加热温度分布与病害关系的探讨

论述了轮箍套装加热时热时温度分布不均是导致轮箍面发生剥离病害的重要因素，从现场统计数据和分析对其成因进行了研究，在列车为断提速、轮对运用工况相对变差的情况下，执行正确的套箍工艺或改用新型轮箍加热设备是提高轮箍质量、消除隐患、降低生产成本、确保行车安全的重要措施。     

Application of a 3-D variational inverse model to the analysis of ecohydrodynamic data in the Northern Bering and Southern Chukchi Seas

In the scope of the Inner SHelf Transfer And Recycling Program, extensive oceanographic surveys were conducted in the Northern Bering and Southern Chukchi Seas. A vast amount of hydrographic, chemical and biological data were collected in order to increase the information available on the system and to test if biological observations are indeed compatible with the dominant hydrographic regimes. An original model, based on the variational inverse method, was developed with the aim of reconstructing realistic three-dimensional fields of the variables of interest and giving an interpretation of the observations consistent with the physics of the general circulation. The basic formulation of the model is quite general and provides a very helpful tool in the context of interdisciplinary studies. In a first stage, the vertical and horizontal structures of physical variables are reproduced and discussed. Secondly, a sketch is proposed to explain the driving mechanisms of the primary productivity in the Northern Bering Sea. In particular, one shows that the hydrodynamic regimes strongly condition the behaviour of the ecosystem and are mainly responsible for the very fertile environment that characterizes the Southern Chukchi Sea.     

Recreational Leasing of Alaska Commercial Halibut Quota: The Early Years of the GAF Program in Alaska

The Pacific Halibut Catch Sharing Plan formalized the process for allocating halibut between the Alaska commercial and recreational charter sectors. It included a new program intended to allow for “flexibility” through inter-sectoral trading, permitting charter operators to lease commercial halibut pounds to relax client harvest restrictions. Here we evaluate the first two years of lease market activity and participation. Participation from some commercial quota holders in the lease market suggests that the program provided beneficial flexibility; in fact, the number of transfers to the charter sector was greater than transfers within the commercial sector for some quota types. We also identified a high proportion of self-leasers. However, transfers to the charter sector were on average smaller than within-sector commercial transfers, and total poundage leased by the charter sector was low compared with commercial transfers. Usage of leased quota by the recreational charter sector enables the harvest of larger fish or additional fish, and provides flexibility in catch composition on halibut closure days. Finally, the value-per-pound may be higher in the charter sector, as commercial-to-charter transfer prices approached the commercial ex-vessel price.