scholarly journals Coherent Parallelization of Universal Classical Computation

2021 ◽  
Author(s):  
Carlos A Perez-Delgado ◽  
Sai Vinjanampathy
Keyword(s):  
Energy Storage ◽  
Higher Order ◽  
Sequential Algorithms ◽  
Battery Charging ◽  
Quantum Energy ◽  
Model Of Computation ◽  
Speed Up

Abstract Previously, higher-order Hamiltonians (HoH) had been shown to offer an advantage in both metrology and quantum energy storage. Here, we axiomatize a model of computation that allows us to consider such Hamiltonians for the purposes of computation. From this axiomatic model, we formally prove that an HoH-based algorithm can gain up to a quadratic speed-up over classical sequential algorithms—for any possible classical computation. We show how our axiomatic model is grounded in the same physics as that used in HoH-based quantum advantage for metrology and battery charging. Thus we argue that any advance in implementing HoH-based quantum advantage in those scenarios can be co-opted for the purpose of speeding up computation.

scholarly journals How Hybridization of Energy Storage Technologies Can Provide Additional Flexibility and Competitiveness to Microgrids in the Context of Developing Countries

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3138 ◽  
Author(s):  
Linda Barelli ◽  
Gianni Bidini ◽  
Paolo Cherubini ◽  
Andrea Micangeli ◽  
Dario Pelosi ◽  
...  
Keyword(s):  
Developing Countries ◽  
Energy Storage ◽  
Capital Expenditure ◽  
Renewable Energy Sources ◽  
Energy Access ◽  
Hybrid Storage ◽  
Cost Of Energy ◽  
Speed Up ◽  
Promising Solution ◽  
Storage Technologies

Hybrid microgrids, integrating renewable energy sources and energy storage, are key in extending energy access in the remote areas of developing countries, in a sustainably way and in providing a good quality of service. Their extensive development faces a financing gap, having a high capital expenditure (CAPEX) also due to high storage costs. In the present work, a case study of a Ugandan microgrid was used to compare various battery technologies employed on their own and in a combination with a flywheel, in terms of their durability and the overall levelized cost of energy (LCOE) of the plant. Simulations show how hybrid storage configurations result in a lower LCOE for the current load profile of the microgrid and even more so for two reference residential and industrial load scenarios, suggesting this would remain the best solution even accounting for future socio-economic development. The resulting LCOE for hybrid storage configurations is lower than the average values reported for microgrid projects and represents a promising solution to speed up the development of such electrification initiatives.

scholarly journals Lithium Titanate Battery Management System Based on MPPT and Four-Stage Charging Control for Photovoltaic Energy Storage

2018 ◽  
Vol 8 (12) ◽  
pp. 2520
Author(s):  
Zhihe Fu ◽  
Yibiao Fan ◽  
Xiaowei Cai ◽  
Zhaohong Zheng ◽  
Jiaxiang Xue ◽  
...  
Keyword(s):  
Energy Storage ◽  
Control Algorithm ◽  
Storage System ◽  
Energy Storage System ◽  
Lithium Titanate ◽  
Battery Management System ◽  
Battery Charging ◽  
Current Regulation ◽  
Photovoltaic Power ◽  
Charging Control

To overcome the unstable photovoltaic input and high randomness in the conventional three-stage battery charging method, this paper proposes a charging control strategy based on a combination of maximum power point tracking (MPPT), and an enhanced four-stage charging algorithm for a photovoltaic power generation energy storage system. This control algorithm ensures that the charging process is not affected by fluctuations in the photovoltaic power. The discharge bus waveform, push–pull discharge load switching waveform, push–pull circuit efficiency, and voltage and current regulation accuracies of the system were investigated. The experimental results show that the charging process is consistent with the designed four-stage charging control algorithm, the voltage and current regulation accuracies satisfy the charging requirements, the busbar remained stable during the battery charging and discharging switch, and the battery balancing effect was good.

scholarly journals Phương pháp song song khai phá tập lợi ích cao dựa trên chỉ số hình chiếu

2017 ◽  
pp. 31
Author(s):  
Đậu Hải Phong
Keyword(s):  
Data Mining ◽  
Parallel Algorithms ◽  
Experimental Results ◽  
Sequential Algorithms ◽  
Parallel Method ◽  
Speed Up ◽  
High Utility ◽  
High Utility Itemsets ◽  
Better Than

High utility itemsets (HUIs) mining is one of popular problems in data mining. Several parallel and sequential algorithms have been proposed in the literature to solve this problem. All the parallel algorithms to try reduce synchronization cost and caculation global profit of itemsets. In this paper, we present a parallel method for mining HUIs from projection-based indexing to speed up performance and reduce memory requirements. The experimental results show that the performance and number candidate of our algorithm is better than some non parallel algorithms.

scholarly journals QUANTUM-CLASSICAL CORRESPONDENCE IN THE ORACLE MODEL OF COMPUTATION

2006 ◽  
Vol 04 (04) ◽  
pp. 633-640 ◽  
Author(s):  
ANTONI WÓJCIK ◽  
RAVINDRA W. CHHAJLANY
Keyword(s):  
Correspondence Principle ◽  
Rigorous Proof ◽  
Model Of Computation ◽  
Classical Correspondence ◽  
Speed Up ◽  
Oracle Complexity ◽  
Quantum Speed Up

The oracle model of computation is believed to allow a rigorous proof of quantum over classical computational superiority. Since quantum and classical oracles are essentially different, a correspondence principle is commonly implicitly used as a platform for comparison of oracle complexity. Here, we question the grounds on which this correspondence is based. Obviously, results on quantum speed-up depend on the chosen correspondence. So, we introduce the notion of genuine quantum speed-up which can serve as a tool for reliable comparison of quantum versus classical complexity, independent of the chosen correspondence principle.

Research on Black-Start of Optimal Operation of Hydropower, Wind Power, Energy Storage in Regional Grid

2015 ◽  
Vol 740 ◽  
pp. 433-437
Author(s):  
Zheng Ye ◽  
Xiao Xia Zhou ◽  
Jin Zhi Xie ◽  
Wen Qing Cheng ◽  
Ling Zheng ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Wind Power ◽  
Optimal Operation ◽  
Combined System ◽  
Effective Measure ◽  
Speed Up ◽  
System Restoration ◽  
Simulation Results ◽  
Important Significance

Black-start is an effective measure to restore the power system when blackout occurs. An appropriate black-start scheme may not only speed up system restoration, reduce outage losses, but also have important significance to deal with emergencies. In this paper, a method to design black-start scheme for a combined system in Taizhou regional grid is presented. The feasibility and efficiency of designing black-start scheme is significantly improved, based on comprehensive consideration of Taizhou regional situation and the real-time status of hydropower, wind power, energy storage and circuits. The simulation results show that the new method is valid.

scholarly journals Quantum Speed-Up in Collisional Battery Charging

2021 ◽  
Vol 127 (10) ◽  
Author(s):  
Stella Seah ◽  
Martí Perarnau-Llobet ◽  
Géraldine Haack ◽  
Nicolas Brunner ◽  
Stefan Nimmrichter
Keyword(s):  
Battery Charging ◽  
Speed Up ◽  
Quantum Speed Up
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