试析荻生徂徕关于汉语教育的理论与实践

荻生徂徕是日本江户时代最名的思想、学家和古辞家，同时还是一位出色的汉语教育家。他分析了汉语和日语语言系统的差别，提出从汉语语音教育着手，逐渐增加词汇量，通过大量阅读汉原的实践，最后能够如中国人一样阅读汉书籍。     

多平台信息源的JDBC解决方案

作者阐述了利用JDBC技术解决查询多平台信息源的方法,通过对实验室模拟环境下探索性开发的探讨,提出了使用Servlet与Applet相结合的解决方案。     

Changing policies in Eastern Europe and their impact on the maritime field: experiences from Eastern Germany

The political changes that occured in Eastern Europe from the late 1980s coincided in the fromer German Democratic Republic (GDR) with the reunification of Germany. The economic result was the existence of a split economy in Germany. Within the maritime field the problem had to be solved by a change over of the former GDR's maritime industry from the centrally-planned command type economy as its failure was evident. Three economic factors were identified as the main causes for the failure which made, together with some other negatives, the collapse inevitable. The transition of the East German maritime industry started immediately after reunification. In the maritime field, two different forms of economic transition have been applied. Using the examples of the main shipping company and the seaports the economic transition process has been analyzed and some basic conclusions regarding the substance and methods of economic transition have been drawn.     

高速公路路堤和路面软基病害检测及加固处理

某高速公路 K1 0 4 2 0 0～K1 0 6 5 0 0段穿过鱼塘 ,路堤采用钢渣水中挤淤法施工 ,通车后路面出现了严重的纵向裂缝、车辙、沉陷 ,影响了路面的使用性能 ,同时路堤存在滑动的隐患 ,必须进行加固处理。为此 ,首先通过系统检测 ,分析路面裂缝产生的原因 ,然后提出针对性的加固处理方案 ,最终实施加固处理施工 ,所取得的成果对其它高速公路的维修加固具有参考价值     

基于VBA的沥青最佳用量数据处理系统

沥青最佳用量是提高公路路面质量的前提之一。本研究的目的是开发出一个数据处理系统，它建立在最小二乘法基础上，能对热拌沥青混合料的马歇尔试验数据进行自动处理，得出最佳沥青用量OAC1和OAC2，并自动生成试验报告，便于施工现场管理。     

Performance Evaluation of Hybrid-Drive Buses and Potential Fuel Savings in Brazilian Urban Transit

Transporting more than 55 million passengers per day, buses are the main transit mode in Brazil. Most of these vehicles use diesel oil and this situation causes dependence on oil, extensive greenhouse gas emissions and increasing air pollution in urban areas. In order to improve this situation the options for Brazilian cities include the use of alternative fuels and new propulsion technologies, such as hybrid vehicles. This article proposes a procedure for evaluating the performance of a recently developed Brazilian hybrid-drive technology. A simple procedure is presented to compare hybrid-drive buses with conventional diesel buses in urban operation focusing on fuel economy and the potential for reducing diesel oil consumption through the use of hybrid-drive buses. Field tests carried out by the authors indicate that fuel consumption improvement through the use of hybrid-drive buses would certainly exceed 20%, resulting in lower fuel costs and reduced carbon dioxide (CO₂) emissions.     

Optimal Threshold Policies for Robust Data Center Control

With the simultaneous rise of energy costs and demand for cloud computing, efficient control of data centers becomes crucial. In the data center control problem, one needs to plan at every time step how many servers to switch on or off in order to meet stochastic job arrivals while trying to minimize electricity consumption. This problem becomes particularly challenging when servers can be of various types and jobs from different classes can only be served by certain types of server, as it is often the case in real data centers. We model this problem as a robust Markov decision process (i.e., the transition function is not assumed to be known precisely). We give sufficient conditions (which seem to be reasonable and satisfied in practice) guaranteeing that an optimal threshold policy exists. This property can then be exploited in the design of an efficient solving method, which we provide. Finally, we present some experimental results demonstrating the practicability of our approach and compare with a previous related approach based on model predictive control.     

Numerical study on active wave devouring propulsion

The possibility of extracting energy from gravity waves for marine propulsion was numerically studied by a two-dimensional oscillating hydrofoil in this study. The commercially available computational fluid dynamics software FLUENT was used for the unstructured grid based on the Reynolds-average Navier?CStokes equation. The free surface waves and motion of the flapping foil were implemented by customizing the FLUENT solver using a user-defined function technique. In addition, dynamic mesh technology and post processing capabilities were fully utilized. The validation of the model was carried out using experimental data for an oscillation hydrofoil under the waves. The results of the simulation were investigated in detail in order to explain the increase of propeller efficiency in gravity waves. Eight design parameters were identified and it was found that some of them greatly affected the performance of wave energy extraction by the active oscillating hydrofoil. Finally, the overall results suggested that when the design parameters are correctly maintained, the present approach can increase the performance of the oscillating hydrofoil by absorbing energy from sea waves.     

沥青搅拌设备燃烧系统的使用维护及故障排查研究

随着我国公路建设的快速发展，越来越多的施工技术应用于公路的建设中，因此施工设备面临着很大的挑战。针对施工中沥青搅拌设备燃烧系统发生的开启风门较大、设备内部阀芯被杂质或者油品堵塞以及无法点火等问题进行了细致的探讨，分析故障排查方法，以保障路面施工不受影响。     

The Geometrical Contact between Track and Wheelset

In previous publications the author has described a so-called first-order theory for the motion of a railway vehicle wheelset on a tangent track. In the present report the geometrical aspect of this theory is further evaluated and a method for solving the constraint equations between the coordinates of the wheelset is indicated.