Optimal time of investment in upgrading product is analyzed under preemption equilibrium and simultaneous equilibrium.

This article, by applying classic and non-classic method, analyses the stability of duopoly equilibrium between mainstreaming firm and its competitor, explains the real agent of technology innovation, and analyses firm strategic behavior to affect market structure and economic performance.

Multi-priority advanced resources reservation scheme based on preemption for lambda-grids;

There exists a waste of bandwidth resources due to the heuristic algorithms for the preemption in multi-protocol label-switching(MPLS) networks.

For DS-TE networks,a new preemption policy is proposed whose basic idea is sorting three criterions according to their importance.

Preemptive Rate-based Batching Approach in Data Stream System;

Therefore, we mainly discusses that unpreemptive priority handoff scheme and preemptive priority handoff scheme in Multiple Traffic Communication System in this paper.

It advances a no preemptive method which is based on task priority and analyzes the security and high-efficiency.

Research and implementation on preemptive kernel of Linux;

Through modification oflinux source codes, preemptivelinux kernel can reduce delayed time ofsystem response, and improve real-time performance of linux, but at the same time bring a problem of priority inversion.