Modeling Lightly Congested Queuing Systems

在许多行业中，存在需要存储或 在采取行动之前车辆或人员排队。 一个 例如，在不同地点处理客户或货物 在不同的行业，为了减少成本和拥挤。 这个项目将研究一个数学模型的发展 对于轻度拥挤的系统，使用港口作为案例研究。 因为 概念的复杂性，近似将被调查 分析和计算机模拟。 研究人员有资格进行这项研究活动。 建议对该项目进行奖励。 这是一个为期12个月的一次性奖励。 8660297 斯图尔特 混凝土结构的老化和随后的劣化是 成为政府机构和私人业主的主要关注点， 这些类型的结构。 关于是否加强或 拆毁房屋在经济上具有重要意义。 为了确定在- 现场混凝土强度无损评价设备是 必需的. 目前，没有可靠的设备可以确定 混凝土单个结构构件的强度。 这个项目将研究使用声波的可能性 谱分析法来评价混凝土的强度。 的 成功完成这项工作将带来的好处 调查是：使工程师能够提供更好建议， 业主决定是否修复或拆除建筑物或桥梁; 允许准确评估预制件的强度性能 从制造过程中产生的组件;以及 为确定剩余寿命的退化状态， 结构 该奖项是1986年小企业创新研究的第一阶段 程序.

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.