理学 云计算 释 software as a service 软件即服务 一种云交付模型。云交付模型是指云提供者提供的具体的、事先打包好的信息技术（informaiton technology，IT）资源组合。软件即服务即云提供者把软件程序作为共享的云服务，作为“产品”或者通用的工具来对外提供服务。这里的软件无需用户安装，仅需通过一个网页浏览器或者精简的客户端来访问。
软件工程 释文 software as a service, SaaS 软件即服务
- Ranis-Fei model
- rank
- rank analysis
- rank-based tributory system
- rank classification
- rank classification of water resources and hydropower projects
- rank correlation
- rank correlation analysis
- rank correlation coefficient
- rank correlation coefficients
- rank correlation method
- rank criteria
- rank criterion
- rank deficient adjustment
- rank deficient model
- rank detector
- ranked
- ranked data
- ranked set sampling
- ranked space
- rank estimate
- rank-free
- rank function
- Rankin
- Rankine