In this paper, a storing model for quadtree called RVA tree is presented.

本文提出了一种四元树的存储模式——RVA存储结构。

youdao

Comparing with RVOT and RVA pacing, RVIS pacing remains relatively normal ventricular activation sequence.

RVIS起搏与RVOT和RVA起搏相比，能够保持相对正常的心室激动顺序。

youdao

The range of variability approach(RVA) is used to evaluate the effects of reservoir operation upon river flow regime.

应用变化范围法（RVA）评估水库运行对河流水文条件的影响。

youdao

The RVA of non-formal and informal learning is indeed gaining relevance with regard to education and training policy.

UNESCO: The UNESCO Liaison Office in Brussels and the European Youth Forum push for recognition of non-formal education | United Nations Educational, Scientific and Cultural Organization

The value of RVA for the European Qualifications Framework will also be discussed.

UNESCO: EDUCATION

In recent years, some Member States have developed mechanisms for the recognition, validation and accreditation (RVA) of non-formal and informal learning, and many more are in the process of doing so.

UNESCO: The UNESCO Liaison Office in Brussels and the European Youth Forum push for recognition of non-formal education | United Nations Educational, Scientific and Cultural Organization