Tenant-centric Sub-Tenancy Architecture in Software-as-a-Service

AbstractMulti-tenancy architecture (MTA) is often used in Software-as-a-Service (SaaS) and the central idea is that multiple tenant applications can be developed using components stored in the SaaS infrastructure. Recently, MTA has been extended to allow a tenant application to have its own sub-tenants, where the tenant application acts like a SaaS infrastructure. In other words, MTA is extended to STA (Sub-Tenancy Architecture). In STA, each tenant application needs not only to develop its own functionalities, but also to prepare an infrastructure to allow its sub-tenants to develop customized applications. This paper applies Crowdsourcing as the core to STA component in the development life cycle. In addition, to discovering adequate fit tenant developers or components to help build and compose new components, dynamic and static ranking models are proposed. Furthermore, rank computation architecture is presented to deal with the case when the number of tenants and components becomes huge. Finally, experiments are performed to demonstrate that the ranking models and the rank computation architecture work as design

Recent progress of quantum dots for energy storage applications

Funding Information: This work was supported by the National Key Research and Development Program of China (2020YFC2005500), the National Natural Science Foundation of China (No. 81972901), Science Foundation of China University of Petroleum (No. 2462020YXZZ0188, 2462019QNXZ02, 2462018BJC004), the Academy of Finland (No. 330214) and the U.S. National Science Foundation (No. 2004251). Funding Information: The authors acknowledgement the financial support from the National Key Research and Development Program of China (2020YFC2005500), the National Natural Science Foundation of China (No. 81972901), Science Foundation of China University of Petroleum (No. 2462020YXZZ0188, 2462019QNXZ02, 2462018BJC004), the Academy of Finland (No. 330214) and the U.S. National Science Foundation (No. 2004251). Publisher Copyright: © 2022, The Author(s).The environmental problems of global warming and fossil fuel depletion are increasingly severe, and the demand for energy conversion and storage is increasing. Ecological issues such as global warming and fossil fuel depletion are increasingly stringent, increasing energy conversion and storage needs. The rapid development of clean energy, such as solar energy, wind energy and hydrogen energy, is expected to be the key to solve the energy problem. Several excellent literature works have highlighted quantum dots in supercapacitors, lithium-sulfur batteries, and photocatalytic hydrogen production. Here, we outline the latest achievements of quantum dots and their composites materials in those energy storage applications. Moreover, we rationally analyze the shortcomings of quantum dots in energy storage and conversion, and predict the future development trend, challenges, and opportunities of quantum dots research.Peer reviewe