Modeling Lightly Congested Queuing Systems

在许多行业中，在采取行动之前需要存储或排成一排的车辆或人员。例如，在不同地点和不同行业处理客户或货物，以降低成本和拥堵。本项目将以港口为例，研究轻度拥挤系统的数学模型的发展。由于这个概念的复杂性，我们将用分析方法和计算机模拟来研究近似。研究人员有资格进行这项研究活动。该项目被推荐为一个奖项。这是一个为期12个月的一次性奖励。混凝土结构的老化和随后的劣化正成为政府机构和这类结构的私人业主主要关注的问题。是加固还是拆除的问题具有首要的经济重要性。为了确定混凝土的原位强度，需要使用无损检测设备。目前，还没有可靠的设备来确定混凝土的单个结构构件的强度。本项目将探讨使用声波频谱分析方法来评估混凝土强度的可能性。顺利完成这项调查的好处是：使工程师能够就是否修葺或拆卸建筑物或桥梁，向业主提供更佳的意见；允许准确评估从制造过程中生产的预制组件的强度特性；并通过识别老化状态来确定结构的剩余寿命。该奖项是1986年小企业创新研究计划的第一阶段。

In many industries there are situations which require a storage or a lining up of vehicles or people before an action can be taken. An example, is the processing of customers or goods at various locations and in different industries, in order to reduce costs and congestion. This project will investigate the development of a mathematical model for lightly congested systems, using ports as a case study. Because of the complexity of the concept, approximations will be investigated analytically and with computer simulations. The researcher is qualified to perform this research activity. The project is recommended for an award. This is a one time award for twelve months. 8660297 STEWART The aging and subsequent deterioration of concrete structures is becoming a major concern for governmental agencies and private owners of these types of structures. The question of whether to strengthen or demolish is of prime economic importance. In order to determine the in- situ strength of the concrete, nondestructive evaluation equipment is required. Currently, there is no reliable equipment which can determine the strength of individual structural members of concrete. This project will investigate the possibilities of using a sonic wave spectral analysis method to evaluate the strength of the concrete. The benefits to be derived from a successful completion of this investigation are: enabling engineers to provide better advice to owners on whether to rehabilitate or demolish a building or bridge; allowing accurate evaluation of the strength properties of pre-cast components produced from a manufacturing process; and identifying the state of deterioration for a determination of the remaining life of the structure. This award is Phase I of the 1986 Small Business Innovation Research Program.