The electronic control units (ECUs) are more modular in autonomous underwater vehicles (AUVs). The controller area network (CAN) is selected as the underlying networks in AUVs, because of the modularity, safety, and availability in the fields of distributed real-time systems. CAN is based on the broadcast communication mechanism. Every message has a message identifier, which is unique within the whole network since it defines content and the priority of the message. Bus access conflicts are resolved by bit-wise arbitration of the identifiers, which makes the node with the highest priority message holds the bus access and all the other competitors automatically become receivers of the message. This paper introduces an approach of message transmission scheduling for CAN-bus AUV. The objective is to provide the real-time transmission of periodic messages and guarantee low message latency times for messages including periodic, aperiodic and sporadic messages. Finally, an example of message transmission scheduling is presented for AUV.

Positioned on sustainable development philosophy, aiming to build a concise and systematic appraisal index system for green campus, the paper builds the index system and hierarchy structure model from perspectives of planning and ecology, energy and resources, environment and health, operation and management, education and promotion and etc. It adopts Analytic Hierarchy Process to analyze each factors' weights in the appraisal system thus providing a measurable analytic method for the appraisal of green campus deployment.

Abstract. The paper is intended to create a relatively simple and clear post-evaluation system for green campus. From the aspects of planning and ecology, energy and resources, environment and health, operation and management, education and promotion, by use of the analytic hierarchy process, the paper aims to determine the weight, build a model and establish a post-evaluation system for green campus. With Jiangnan University as an example, adopting multi-level grey evaluation method, the paper makes an evaluation of Jiangnan University and gains according star grade.