there are some problems with estimating the time required for the manufacturing process of products, especially when there is a variable serving time, like control stage. these problems will cause overestimation of process time. layout constraints, reworking constraints and inflexible product schedule in multi product lines need a precise planning to reduce volume in particular situation of lin...

the problem we investigate deals with the optimal assignment of resources to the activities of a stochastic project network. we seek to minimize the expected cost of the project include sum of resource utilization costs and lateness costs. we assume that the work content required by the activities follows an exponential distribution. the decision variables of the model are the allocated resourc...

This paper surveys the contributions and applications of queuing theory in the field of healthcare. The paper summarizes a range of queuing theory results in the following areas: waiting time and utilization analysis, system design, and appointment systems. The paper also considers results for systems at different scales, including individual departments (or units), healthcare facilities, and r...

The transmission delay is an important index of the system performance of NoC (Network on Chip). Although the method of simulation-based can get accurate transmission delay, the simulation requires time consuming and a large number of test vectors. Especially in the study of some algorithms, such as mapping algorithms, buffer allocation algorithm, the simulation method is not applicable. To sol...

Visible light communication (VLC)/radio frequency (RF) hybrid networks exhibit large system capacity, high reliability, and low access latency. To simplify the resource allocation process of such networks, we devise a random compensation algorithm based on supermartingale theory. Firstly, network queuing model with arrival traffic service mechanism are established. Then, delay performance is ev...

This paper considers a truck scheduling problem in a multiple cross docks while there is temporary storage in front of the shipping docks. Receiving and shipping trucks can intermittently move in and out of the docks during the time intervals between their task execution, in which trucks can enter to any of the cross docks. Thus, a mixed-integer programming (MIP) model for multiple cross docks ...

Video transmission over wireless networks has quality of service (QoS) requirements and the time-varying characteristics of wireless channels make it a challenging task. IEEE 802.11 Wireless LAN has been widely used for the last mile connection for multimedia transmission. In this paper, a cross-layer design is presented for video streaming over IEEE 802.11e HCF Controlled Channel Access (HCCA)...

Geometric Programming (GP) is a class of nonlinear optimization withmany useful theoretical and computational properties. Over the last fewyears, GP has been used to solve a variety of problems in the analysisand design of communication systems in several ‘layers’ in the commu-nication network architecture, including information theory problems,signal processing algorithms, ...

Platform architectures for modern embedded systems are increasingly heterogeneous and parallel. Early design decisions, such as the allocation of hardware resources and the partitioning of functionality onto architecture building blocks, become even more complex and important for the resulting design quality. To effectively support designers during the concept phase we base our design flow Syst...

In the smart distribution gird, various communication technologies are adopted to form a seamless heterogeneous communication network to deliver control and protection signals. However, most scheduling strategies designed for smart gird aim at optimizing system operation performance without considering the transmission cost. To address this problem, we construct a delay-constrainted cost optimi...