计算机联锁模拟培训系统

主要介绍了计算机联锁培训系统平台的研制开发。系统依靠计算机技术、控制技术、网络技术，完全模拟计算机联锁设备的显示界面与操作方法，做到与现实设备操作一致，使操作人员如同亲临现场，从而达到使电务工作者能进行培训、演练和开发的目的。     

皂河三线船闸闸室墙倒角砼表面质量控制措施

在倒角斜面砼的施工中如何降低砼表面的蜂窝、麻面、砂斑、砂线，一直是工程施工的一个难题。通过对皂河三线船闸闸室墙倒角施工工艺的改进，斜面砼表面质量得到了较好的控制。     

A multi-commodity flow network design problem

There exist systems which can be usefully described by a network containingarcs through which a commodity of one type flows. This paper is concerned with finding a solution procedure for a particular multi-commodity flow network design problem. The problem is to identify a set of arcs in the network such that if travel is prohibited in them all flow travels by feasible paths and its total cost is minimal. The total flow in each arc may not exced its capacity, which is a known constant. Each arc and each node of the network has a non-negative constant unit traversal cost. Between each pair of distinct nodes there is a given non-negative rate of flow from the first vertex to the second which may be split up among a number of paths according to some constant traversal cost flow assignment process. The optimality criterion is the total traversal cost of all flow, which is to be minimized. Previous work on network design problems of this type is surveyed. The principal contribution of this paper is the presentation of a solution procedure for the above problem based on branch and bound enumeration. An illustrative numerical example is included. Computational experience gained in using the procedure with a FORTRAN IV program on an IBM 370 is favourable.     

免振捣高性能混凝土的研究

从免振捣高性能混凝土的配比设计方法、原材料选择、流变学特征和工作性能测试方法、硬化免振捣混凝土的物理力学性能、体积变形性能、耐久性能，以及免振捣混凝土的工程应用、存在的问题和发展前景等方面进行了探讨和论述。认为配制免振捣高性能混凝土宜采用体积法或改进后的体积法。     

Lights, camera and acoustics: Assessing macrobenthic communities at a dredged material disposal site off the North East coast of the UK

This study presents the results of a trial assessment based on a combination of sampling techniques at a dredged material disposal site located off the North East coast of the UK, over 2001 to 2004. The site was surveyed with a high-resolution sidescan sonar system producing a mosaic with 100% coverage of the survey area. Benthic communities and sediments were ground-truthed using a Hamon grab with a video camera. Additionally, the area was also sampled in 2003 with a Sediment Profile Imaging (SPI) camera, which complemented other techniques by providing in situ information on sediment quality, and biogenic activities. An assessment is made of the benefits of combining the results from conventional methods, principally using grab samples, with those from acoustic techniques and optical imaging devices to determine seafloor and macrobenthic conditions. This information has the potential to contribute to the enhancement of routine monitoring programmes within UK waters.     

Evaluating commuter opinion of congestion pricing in metropolitan Seattle

Continued growth and development in the Puget Sound region combined with existing geographic limitations have resulted in a transportation network that is at or near capacity for many hours during every weekday. Single‐occupancy vehicles (SOVs) remain the predominant mode of travel, despite a network of high‐occupancy vehicle lanes and regional transit. Given this situation, considering alternative methods to regulate traffic flow is necessary, and the implementation of a regional congestion pricing system is one such option. Although widespread throughout the world, congestion pricing has only recently been implemented in the United States.     

Transport ferroviaire régional en Allemagne. L’exemple de la région de Leipzig

The German regional rail passenger transport (SPNV) is, eighteen years after the railway reform of 1993, a dynamic one. Over the last fifteen years, passengers have increased by +43% and trains.km by +28%. There are more than 30 railway operators. Tenders drive this dynamism and newcomer’s market share is approaching 25% in 2011 (in train.km). The Leipzig region, which has seen the birth of long-distance rail transport with the great line Leipzig-Dresden inspired by F. List (1834), participate in this revival: since 2010, two operators, DB Regio and Veolia, share regional rail services. What early lessons can be drawn for the reform of the French TER?     

An analytical investigation of two-dimensional and three-dimensional biplanes operating in the vicinity of a free surface

In the present article, the classical two- and three-dimensional lifting theories are generalized to the biplane operating in proximity to a free surface. The singularity distribution method is employed to calculate the lifting force for a two-dimensional biplane subjected to wing-in-ground effect in the vicinity of a free surface, and the three-dimensional correction is carried out by the aid of the Prandtl lifting line theory. The essential techniques lie in finding the three-dimensional Green’s function for the system of horseshoe vortices operating above a free surface and ensuring numerical implementation. Extensive numerical examples are carried out to show the lift coefficient for the two- and three-dimensional biplanes in the vicinity of a free surface with the variation of the clearance-to-chord ratio and the height-to-chord ratio. Incidentally, the induced (inviscid) drag coefficients as well as the lift-to-drag ratio for a three-dimensional biplane are also computed. Good agreement can be found among results obtained from this study and the experiment.     

高速公路双曲线法推算工后沉降误差分析

以乍嘉苏高速公路软土路基处理典型断面实测沉降资料为基础,采用双曲线法进行工后沉降推算,研究了初始时间t0对推算精度的影响。研究表明,普遍应用的双曲线法的推算精度与推算的初始时间t0关系较大,恒载期初始时间值采用2个月时,取较长时间的沉降资料进行推算,误差均值最小可达3.76%,获得较满意的推算精度,对预留沉降量、预抛高及养护等有十分积极的意义。