昆明城市轨道交通与土地一体化规划研究

在我国城市发展轨道交通的过程中,公共交通导向土地使用的开发策略(TOD)理念虽已成为共识,但在具体实施过程中,尚未充分发挥轨道交通对城市规划的引导作用。为深入分析以上问题,以昆明市为例,研究在城市现状及远景规划控制下,轨道交通周边的用地、人口、岗位分布情况,发现TOD发展理念并未很好地融合到我国现有规划体系中,实施中缺少轨道交通对建设用地分布的\"强反馈\"机制。提出总规、控规、轨道交通规划3个层面上的规划建议,以期对我国城市轨道交通规划与城市规划良性互动提供一定的参考。     

Options-Based Multi-Objective Evaluation of Product Platforms

A platform is the set of elements and interfaces that are common to a family of products. Design teams must choose among feasible platform concepts upon which a product family could be based, often involving new technologies. Multiple performance objectives need to be considered. A standard approach is to convert the performance outcomes into financial figures, which can then be weighed against the required investments. However, it is not always possible to transform performance outcomes (benefits) into monetary terms, such as in defense or highly technical projects. A multi-objective form of real-options-based platform selection is developed. Systems are compared based on multiple technical and economic goals, incorporating uncertainty by representing the unknown factors during the subsequent development process with probability distributions. The range of uncertain outcomes is integrated into single expected measures of effectiveness, which can then be applied to select the most appropriate platform and set of support product variants. An application to the design of platform-based families of naval high-speed ships is shown.     

A Low-Cost Transfer Function Identification Technique for Automotive Suspensions

An alternative technique for identifying the transfer function of automotive suspension systems is presented in this paper. The method establishes a frequency response from which the transfer function can be determined by using a low cost test rig developed for the purpose. This results in a transfer function matrix which can include asymmetry in the suspension, tyre stiffness and damping. The technique is validated by comparing results for a two-wheeled trailer with those obtained on a conventional hydraulic test rig. Results from this procedure may be used to evaluate passive or active suspension systems or to feed into a suspension modelling process for such purposes as active suspension control strategy development.     

Optimizing shipping company operations using business process modelling

In order to identify the elements constituting quality in services, a business process modelling methodology has been applied in the case of a Greek liner shipping company. The company operations have been identified and analysed in order to assess the complete performance of service elements and thereafter identify how to match the service performance against the user requirements. A liner container service within Europe has to compete with the road transport which, in many cases, is an alternative to the sea transportation and not complementary to it. Thus, not only the ship has to be envisaged when aiming to improve quality in services but also the whole chain, namely port authorities, land transportation enterprises, subcontractors, agents, charterers and others. A set of potential improvements within this framework are thus suggested and time and cost (examined in a specific voyage scenario) are measured before and after the implementation of these measures. Very large time and cost savings are observed after the application of the technology improvements, allowing, in fact, the shipping company to even increase the number of round trips per year in the examined route. This indicates that very large benefits can be drawn by analysing and critically adjusting business processes in modern shipping companies.     

软开关变流器的稳态分析(二)

讨论软开关变流器的稳态分析.由于分别由软开关变流器的Lr-Cr单元和大的L-C滤波器单元决定的快、慢固有频率的共存,通过启动瞬态仿真程序寻找软开关变流器的稳态解可能会造成繁琐的计算和收敛失败.由于采用了基于暂态分析的换相检测技术和基于补偿原理的换相分析技术,文章所提出的数值法显示了高可靠性和快速收敛性.对两个直流变换器、一台逆变器和一台功率因数补偿装置作的稳态分析,突出显示了仿真算法的良好性能.     

抑癌基因p16、Rb的表达与胆囊癌预后的关系

目的　研究抑癌基因 p1 6及Rb的表达与胆囊癌预后的关系。方法　用SP免疫组化法同步检测 41例胆囊癌患者抑癌基因 p1 6及Rb的蛋白表达。 结果　p1 6与Rb蛋白表达阳性组生存率明显优于阴性组。结论　p1 6及Rb在胆囊癌的预后判定中具有重要价值 ,同步检测两者的预后价值优于单一检测。     

Analysis of the continuous berth allocation problem in container ports using a genetic algorithm

The optimal usage of berths plays a key role in raising the efficiency of container terminals. The berth allocation problem in a container terminal is defined as the feasible allocation of berths to incoming ships such that the total time that elapses between the arrival of the ships to their exit from their berths is minimized. In the transportation literature, the latter problem is usually formulated as a mixed integer programming model. Optimization methods, like the branch and bound algorithm, are efficient ways to solve this model but become absolutely unusable when the size of the problem increases. An advanced search method such as GA may be suited to such a situation. In this paper, a genetic-based algorithm is proposed for the problem. Computational results for two test problems (a small and a large-sized problem) are also presented. The results from the small test are also compared with the results obtained from the branch and bound algorithm.