satm

英

美

网络积测试仪; 美国材料试验学会

Objective: The Scholastic Aptitude Test of Mathematics ( SATm) for3~ 4 Grades was development, the items were analyzed, and the reliabilities and validities were tested.
目的：初步编制3～4年级数学学业能力倾向测验，对测验的条目进行质量分析，对测验的信度和效度进行检验。
On-board Switching Based SATM System Design
基于星上交换的卫星ATM系统设计
In this paper, the architectures and the characteristics of satellite ATM broadband network are presented and the adaptive error control of SATM network based on transparent satellites is discussed.
介绍了卫星ATM宽带网络的结构和特性，并讨论了应用于透明卫星ATM网络的自适应差错控制技术。
Secondly, this paper explains the communication flows and the design method of SATM system. The hardware components and functional structures of the terrestrial gateway are carefully analyzed also.
然后介绍了卫星ATM交换系统的设计方案和通信流程，并着重分析了地面适配网关的功能结构和硬件组成。
It is shown by the completed debug and test works that the designed system realized principal functions of SATM signaling system, and attaining the design object.
已经进行的调试和验证结果表明所设计的系统能完成星上ATM信令系统的基本功能，可以达到预期目标。