无框式风门建造技术应用

针对传统通风设施中风门的维修问题,对风门地点、环境等诸多影响因素进行了分析研究,结合现场实际情况,采用了无框式风门的建造技术,将门轴直接埋设在墙体之中,降低了门轴的腐蚀程度,门扇直接覆盖在墙体之上,降低了潮湿环境对其的侵害。实践证明,无框式风门的投入使用,解决了传统风门中存在的疑难问题,延长了风门的使用寿命。

多种教学方式并举 改变QBASIC语言单一讲授

教师不仅仅要教给学生知识,更重要的是教给学生掌握知识的方法,让学生用轻松愉快的心态积极地吸收知识。我有意识地将兴趣教法引入到教学实践中,变单一的讲授式为多种教法并举,变学生被动学习为主动学习,变教师课堂主体地位为主导地位。讲授课:引入类比方式,激发学生兴趣计算机的语言教学具有较强的抽象性和严密的逻辑性,是本学科的难点。它不像录入、排版。

Authorization Administration in a Distributed Multi-application Environment

To meet the authorization administration requirements in a distributedcomputer network environment, this paper extends the role-based access control model with multipleapplication dimensions and establishes a new access control model ED-RBAC(Extended Role Based AccessControl Model) for the distributed environment. We propose an extendable hierarchical authorizationassignment framework and design effective role-registeringi role-applying and role-assigningprotocol with symmetric and asymmetric cryptographic systems. The model can be used to simplifyauthorization administration in a distributed environment with multiple applications.