Multi-heuristic scheduling methods for workflow in credit cloud

In the credit cloud, credit services are sold to applications for credit computing, credit fusion and credit risk estimates. Plenty of services with different performance for the same task may have different execution time and charged by various ways. The users have specific requirements for the workflow completion time or cost. Hence, to meet the user’s satisfaction is an important challenge. In this paper, we propose heuristic scheduling methods for credit workflow with total cost minimization, and the deadline should be satisfied. The problem can be divided into two sub-problems, task-mode mapping and task tabling on renting service instances. For the task-mode mapping problem, a recursive heuristic method is constructed to select appropriate service for each task of the workflow. Then another heuristic algorithm based is established to get a final schema with deadline constraint. We discussed the service instance rented in shareable manner and compared with un-shareable manner. Three renting strategies are discussed in detail. Experimental results show the effectiveness and efficiency of the proposed algorithm.

Polymorph Exploration of Bismuth Stannate Using First-principles Phonon Mode Mapping

In this work, we present a new unbiased and efficient quantum chemical method for exploring the potential energy surface of complex crystal structures using theoretically rigorous phonon mode-mapping approach. The method successfully recovers the known experimental phases of the pyrochlore-based Bi₂Sn₂O₇, one of the most difficult cases in structural chemistry, which highlights its utility for searching possible transition pathways and identifying global minima for many other challenging systems.<p></p>

Polymorph Exploration of Bismuth Stannate Using First-principles Phonon Mode Mapping

In this work, we present a new unbiased and efficient quantum chemical method for exploring the potential energy surface of complex crystal structures using theoretically rigorous phonon mode-mapping approach. The method successfully recovers the known experimental phases of the pyrochlore-based Bi₂Sn₂O₇, one of the most difficult cases in structural chemistry, which highlights its utility for searching possible transition pathways and identifying global minima for many other challenging systems.<p></p>

Polymorph exploration of bismuth stannate using first-principles phonon mode mapping

Using a phonon mode-mapping approach, we recover the known experimental phases of the ternary oxide Bi2Sn2O7 and identify three new metastable phases, highlighting the utility of the method for polymorph prediction on many other complex materials.