ZPW-2000A自动闭塞模拟试验

以成功应用于京沪线提速工程中的自动闭塞系统为例,介绍了ZPW-2000A的试验流程和模拟试验方法,并针对ZPW-2000A特有的小轨道探讨了模拟方案.     

Generation of cyclonic eddies in the Eastern Gotland Basin of the Baltic Sea following dense water inflows: numerical experiments

A sigma (σ)-coordinate ocean model by Blumberg and Mellor (POM) is applied to study the formation processes of mesoscale cyclones observed in the Eastern Gotland Basin following the dense water inflows. The initial conditions simulate a situation when the Arkona and Bornholm basins and partially the Slupsk Furrow are already filled with the inflow water of the North Sea origin, while the Eastern Gotland and Gdansk basins still contain the old water of pre-inflow stratification. Model runs with constant and time-dependent winds, changing the buoyancy forcing, grid geometry and bottom topography display the following. Entering the Eastern Gotland Basin from the Slupsk Furrow, the bottom intrusion of saline inflow water splits in two: one goes northeast towards the Gotland Deep, and second moves southeast towards the Gulf of Gdansk. An intensive mesoscale cyclonic eddy carrying the inflow water is generated just east of the Slupsk Furrow with the inflow pulse. A number of smaller cyclones with boluses of the inflow water are formed in the permanent halocline along the saline intrusion pathway to the Gotland Deep. Following Spall and Price [J. Phys. Oceanogr. 28 (1998) 1598], the cyclones are suggested to form by the adjustment of the high potential vorticity inflow water column to a low potential vorticity environment.     

A methodological approach for developing and assessing business models for flexible transport systems

Flexible transport services include a wide range of demand responsive transport systems that provide non-conventional passenger and freight transportation services. Several alternative business models varying according to the local market conditions, the socio-economic, legal, and institutional framework may be developed for the provision of Flexible Transport Systems (FTS). The objective of this paper is twofold: first to present an integrated methodological framework for developing and assessing alternative FTS business models and second to demonstrate its applicability to a case study regarding the prioritization of alternative FTS business models for the provision of flexible passenger transport services in Helsinki.

“任务驱动教学法”在外贸英语函电教学中的应用

“任务驱动教学法”是以学生为主体,以教师为主导,通过发挥语言的交际功能解决实际问题的教学方法。将“任务驱动教学法”引入针对性、实践性强的外贸英语函电课堂可以让学生在完成任务的过程中掌握并巩固相关的知识要点,同时也有利于培养学生运用英语解决实际问题的能力。本文对“任务驱动教学法”在外贸英语函电教学中的应用进行了探讨。     

高职商务英语听说课程教学模式初探

通过对高职商务英语听说课程的教学情况和条件进行的调查分析,根据其教学特点,对高职商务英语听说课程的教学模式进行了探索,在教学方法和课程内容方面进行了相应的改革。     

高职公共英语教学中学生信息素质培养

信息素质是人才综合素质的重要内容之一,因此学生信息素质的培养是当前教育部门必须承担的重要任务和社会责任。以培养应用型人才为目标的高等职业院校责无旁贷。本文通过信息素质这一概念的引入,介绍信息素质培养的主要内容,调查和分析了高等职业院校学生信息素质的现状,从公共英语教学这一特定角度探讨了学生信息素质培养的方法及途径。     

方言对英语学习者语音学习的影响

根据二语习得的理论,母语和目的语之间是存在迁移现象的。由于方言负迁移的现象普遍存在,中国不同地区的学生在说英语时难免会受到方言的影响。本文拟从语音理论和迁移理论出发,研究甘肃地区的英语学习者语音发音中存在的主要问题,并探讨行之有效的语音教学方法。     

Surface CO2 measurements in the English Channel and Southern Bight of North Sea using voluntary observing ships

Ships of opportunity have been used to investigate ocean–atmosphere CO₂ fluxes in the English Channel and Southern Bight of the North Sea. Continuous underway measurements of the fugacity of seawater carbon dioxide (fCO₂^sw), chlorophyll, temperature and salinity have been performed along 26 transects during the spring and autumn periods. The spatial fCO₂^sw distribution along the Channel and Southern Bight is modulated by the photosynthetic activity, temperature changes and water mixing between inputs from the North Atlantic Ocean and riverine discharges. The seasonal variability of fCO₂^sw is assessed and discussed in terms of the biology and temperature effects, these having similar impacts. The variation of fCO₂^sw shows similar interannual patterns, with lower values in spring. The annual average of air–sea CO₂ fluxes places the English Channel as neutral area of CO₂ uptake. The spring and autumn data allow differentiating between distal and proximal continental areas. The Southern Bight shows a tendency towards net CO₂ uptake on the distal continental shelf, whereas the Scheldt and Thames Plumes show a CO₂ source behaviour on the proximal continental shelves.     

铁路货运大客户管理信息系统技术架构及其管理体系的研究

通过深入分析铁路货运大客户管理信息系统建设原则和系统功能,提出了采用集中式与分布式相结合的系统拓扑结构。对铁路大客户管理信息系统的管理体系进行了规划,并从实施范围、实施方案以及工作组织等方面对方案的实施进行了设计。     

重庆江北城CBD交通规划设计理念

CBD区域的交通规划一直是城市交通规划工作中的难点,交通供需矛盾在不同程度上制约着CBD功能的发挥,国内特别是一些大城市CBD区域普遍存在交通系统容量不足、过境交通与CBD交通相互混杂、CBD内部交通系统功能不清等诸多问题。结合重庆江北城CBD交通规划设计,论述了CBD交通规划设计理念,对原交通规划方案存在的一些问题进行分析的同时,突出了交通规划优化方案的可实施性。