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Prediction on CO

Kaiwen HUANG, Ao LI, Bing XIA, Tao DING

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3, Pages 746-759 doi: 10.1007/s11709-020-0635-2

Abstract: Based on the verified model, results show that the CO uptake capacity increases with the increase of RCAThe CO uptake amount of 1 m C30 RAC within 50 years is 10.6, 13.8, 17.2, and 22.4 kg when the RCA replacementThe CO uptake by RCAs is remarkable and reaches 35.8%–64.3% of the total CO uptake by RAC when the RCA

Keywords： RAC CO₂ uptake carbonation specific surface area RCA

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Introducing scalable 1-bit full adders for designing quantum-dot cellular automata arithmetic circuits Research Article

Hamideh KHAJEHNASIR-JAHROMI, Pooya TORKZADEH, Massoud DOUSTI,p-torkzadeh@srbiau.ac.ir,h.khajehnasir@srbiau.ac.ir,m_dousti@srbiau.ac.ir

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 8, Pages 1264-1276 doi: 10.1631/FITEE.2100287

Abstract: Designing logic circuits using complementary metal-oxide-semiconductor (CMOS) technology at the nano scale has been faced with various challenges recently. Undesirable leakage currents, the short-effect channel, and high energy dissipation are some of the concerns. represent an appropriate alternative for possible CMOS replacement in the future because it consumes an insignificant amount of energy compared to the standard CMOS. The key point of designing arithmetic circuits is based on the structure of a 1-bit . A low-complexity block is beneficial for developing various intricate structures. This paper represents scalable 1-bit QCA structures based on cell interaction. Our proposed s encompass preference aspects of QCA design, such as a low number of cells used, low latency, and small area occupation. Also, the proposed structures have been expanded to larger circuits, including a 4-bit , a 4-bit ripple borrow subtractor (RBS), an , and a 2-bit array . All designs were simulated and verified using QCA Designer-E version 2.2. This tool can estimate the energy dissipation as well as evaluate the performance of the circuits. Simulation results showed that the proposed designs are efficient in complexity, area, latency, cost, and energy dissipation.

Keywords： Quantum-dot cellular automata (QCA) Full adder Ripple carry adder (RCA) Add/sub circuit Multiplier