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Multi-party quantum private comparison of size relationship based on one-direction quantum walks on a circle

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science China(information sciences) 2025年第2期68卷 399-400页

作者： Jintao WANG Jiangyuan LIAN Tianyu YE college of information & electronic engineering Zhejiang Gongshang University

Quantum walks(QW) are the quantum counterpart of classical random walks, and portray a natural stochastic process when the walker randomly wanders around. In a discretetime QW system on a circle, when the walker particle generally steps towards two directions, i.e., clockwise and anticlockwise, this kind of QW is called two-direction quantum walks on a circle(TDQWC); and the walker particle always steps towards one direction or stays stationary, this kind of QW is called as one-direction quantum walks on a circle(ODQWC). ODQWC exhibits some different properties,and may induce potential applications in the field of quantum secure multi-party computation.

关键词： Quantum entanglement

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Phase-matching enhanced quantum phase and amplitude estimation of a two-level system in a squeezed reservoir

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Chinese Physics B 2025年第1期34卷 257-263页

作者： Yan-Ling Li Cai-Hong Liao Xing Xiao School of information engineering Jiangxi University of Science and TechnologyGanzhou 341000China college of Physics and electronic information Gannan Normal UniversityGanzhou 341000China

Squeezed reservoir engineering is a powerful technique in quantum information that combines the features of squeezing and reservoir engineering to create and stabilize non-classical quantum states. In this paper, we focus on the previously neglected aspect of the impact of the squeezing phase on the precision of quantum phase and amplitude estimation based on a simple model of a two-level system(TLS) interacting with a squeezed reservoir. We derive the optimal squeezed phase-matching conditions for phase φ and amplitude θ parameters, which are crucial for enhancing the precision of quantum parameter estimation. The robustness of the squeezing-enhanced quantum Fisher information against departures from these conditions is examined, demonstrating that minor deviations from phase-matching can still result in remarkable precision of estimation. Additionally, we provide a geometric interpretation of the squeezed phase-matching conditions from the classical motion of a TLS on the Bloch sphere. Our research contributes to a deeper understanding of the operational requirements for employing squeezed reservoir engineering to advance quantum parameter estimation.

关键词： quantum parameter estimation squeezed reservoir phase-matching conditions quantum Fisher information

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Ru/NiMnB spherical cluster pillar for highly proficient green hydrogen electrocatalyst at high current density

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Journal of Energy Chemistry 2025年第1期100卷 397-408页

作者： Md Ahasan Habib Shusen Lin Mehedi Hasan Joni Sumiya Akter Dristy Rutuja Mandavkar Jae-Hun Jeong Jihoon Lee Department of electronic engineering College of Electronics and InformationKwangwoon UniversityNowon-guSeoul 01897Republic of Korea

Advanced OER/HER electrocatalytic alternatives are crucial for the wide adaptation of green hydrogen ***,Ru/NiMnB spherical cluster pillar(SCP),denoted as Ru/NiMnB,is synthesized using a combination of electro-deposition and hydrothermal *** investigation of Ru doping in the NiMnB matrix revealed significant improvements in electrocatalytic *** Ru/NiMnB SCPs demonstrate superior OER/HER activity with low overpotentials of 150 and 103 mV at 50mA/cm^(2)in 1 M KOH,making them highly competitive with state-of-the-art ***,the Ru/NiMnB SCPs exhibit a low 2-E cell voltage of 2.80 V at ultra-high current density of 2,000 m A/cm^(2)in 1 M KOH,outperforming the standard benchmark electrodes of RuO_(2)||Pt/C,thereby positioning Ru/NiMnB as one of the best bifunctional *** SCPs exhibit exceptional high-current characteristics,stability and corrosion resistance,as evidenced by continuous operation at 1,000 mA/cm^(2)high-current density for over 150 h in 6 M KOH at elevated temperatures under harsh industrial *** a small amount of Ru incorporation significantly enhances the electrocatalytic performances of NiMnB,attributed to increased active sites and improved intrinsic properties such as conductivity,adsorption/desorption capability and reaction ***,Ru/NiMnB SCPs present a promising bi-functional electrode concept for efficient green H_(2)production.

关键词： Advanced electrocatalyst High current Corrosion resistance Industrial requirement

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Enhanced dynamics of Al3+/H+ ions in aqueous aluminum ion batteries:Construction of metastable structures in vanadium pentoxide upon oxygen vacancies

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Journal of Energy Chemistry 2025年第2期101卷 562-569页

作者： Zhibao Wang Hanqing Gu Tianci Wu Wenming Zhang Zhanyu Li Hebei Key Laboratory of Optic-electronic information and Materials National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices College of Physics Science and Technology Hebei University

In recent years,aqueous aluminum ion batteries have been widely studied owing to their abundant energy storage and high theo retical *** in-depth study of vanadium oxide materials is necessary to address the precipitation of insoluble products covered cathode surface and the slow reaction ***,a method using a simple one-step hydrothermal preparation and oxalic acid to regulate oxygen vacancies has been reported.A high starting capacity(400 mAh g-1) can be achieved by Ov-V2O5,and it is capable of undergoing 200 cycles at 0.4 A g-1,with a termination discharge capacity of103 mAh *** analysis demonstrated that metastable structures（AlxV2O5and HxV2O5） were constructed through the insertion of Al3+/H+during discharging,which existed in the lattice intercalation with *** incorporation of oxygen vacancies lowers the reaction energy barrier while improving the ion transport *** addition,the metastable structure allows the electrostatic interaction between Al3+and the main backbone to establish protection and optimize the transport *** parallel,this work exploits ex-situ characterization and DFT to obtain a profound insight into the instrumental effect of oxygen vacancies in the construction of metastable structures during in-situ electrochemical activation,with a view to better understanding the mechanism of the synergistic participation of Al3+and H+in the *** work not only reports a method for cathode materials to modulate oxygen vacancies,but also lays the foundation for a deeper understanding of the metastable structure of vanadium oxides.

关键词： Electrochemical activation Metastable structure Oxygen vacancies Vanadium pentoxide

An Iterated Greedy Algorithm with Memory and Learning Mechanisms for the Distributed Permutation Flow Shop Scheduling Problem

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Computers, Materials & Continua 2025年第1期82卷 371-388页

作者： Binhui Wang Hongfeng Wang college of information science and engineering Northeastern UniversityShenyang110819China

The distributed permutation flow shop scheduling problem(DPFSP)has received increasing attention in recent *** iterated greedy algorithm(IGA)serves as a powerful optimizer for addressing such a problem because of its straightforward,single-solution evolution ***,a potential draw-back of IGA is the lack of utilization of historical information,which could lead to an imbalance between exploration and exploitation,especially in large-scale *** a consequence,this paper develops an IGA with memory and learning mechanisms(MLIGA)to efficiently solve the DPFSP targeted at the ***,we incorporate a memory mechanism to make a more informed selection of the initial solution at each stage of the search,by extending,reconstructing,and reinforcing the information from previous *** addition,we design a twolayer cooperative reinforcement learning approach to intelligently determine the key parameters of IGA and the operations of the memory ***,to ensure that the experience generated by each perturbation operator is fully learned and to reduce the prior parameters of MLIGA,a probability curve-based acceptance criterion is proposed by combining a cube root function with custom *** last,a discrete adaptive learning rate is employed to enhance the stability of the memory and *** ablation experiments are utilized to verify the effectiveness of the memory mechanism,and the results show that this mechanism is capable of improving the performance of IGA to a large ***,through comparative experiments involving MLIGA and five state-of-the-art algorithms on 720 benchmarks,we have discovered that MLI-GA demonstrates significant potential for solving large-scale *** indicates that MLIGA is well-suited for real-world distributed flow shop scheduling.

关键词： Distributed permutation flow shop scheduling makespan iterated greedy algorithm memory mechanism cooperative reinforcement learning

New results on finite-time stability and instability theorems for stochastic nonlinear time-varying systems

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science China(information sciences) 2025年第2期68卷 186-199页

作者： Weihai ZHANG Liqiang YAO college of Electrical engineering and Automation Shandong University of Science and Technology School of Mathematics and information science Yantai University

This paper studies finite-time stability and instability theorems in the probability sense for stochastic nonlinear timevarying systems. Firstly, a new sufficient condition is proposed to guarantee that the considered system has a global ***, we propose new finite-time stability and instability criteria that relax the constraints on LV(the infinitesimal operator of Lyapunov function V) by the uniformly asymptotically stable function. On the one hand, these obtained results make up for the shortcomings of the existing results. On the other hand, the new finite-time stability theorems can be viewed as natural extensions of the existing results and also allow LV to be indefinite(negative or positive) rather than just only allow LV < ***, some simulation examples verify the validity of the theoretical results.

关键词： stochastic nonlinear systems finite-time stability finite-timeinstability uniformly asymptotically stable function

Low dielectric loss in vanadium-based zircon ceramics via high-entropy strategy

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Journal of Advanced Ceramics 2025年第1期14卷 151-161页

作者： Yuheng Zhang Huaicheng Xiang Xiaoyu Wu Yang Zhou Ying Tang Liang Fang college of Physics and electronic information engineering Guilin University of TechnologyGuilin 541004China Guangxi Universities Key Laboratory of Non-Ferrous Metal Oxide electronic Functional Materials and Devices Guangxi Key Laboratory of Optical and Electronic Materials and DevicesCollege of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China

Zircon ceramics have potential applications in next-generation wireless communication because of their low permittivity and adjustable temperature coefficient at microwave ***,the vast challenge of realizing ultralow dielectric loss still ***,we propose a high-entropy strategy to enhance the bonding of the A-site dodecahedron in zircon and design(Nd0.2Eu0.2Y0.2Ho0.2Yb0.2)VO4 ceramics with a high quality factor(high Q×f,that is,low dielectric loss).The(Nd0.2Eu0.2Y0.2Ho0.2Yb0.2)VO4 high-entropy ceramics,which belong to the tetragonal zircon structure with the I41/amd space group,exhibit a low relative permittivity(εr=11.55),a negative temperature coefficient of resonant frequency(τf=−37.3 ppm/℃),and a high Q×f of 76,400 GHz(at 12.31 GHz).The high Q×f value can be attributed to the high chemical bond strength and structural ***,the relationship between the crystal structure and the microwave dielectric properties of(Nd0.2Eu0.2Y0.2Ho0.2Yb0.2)VO4 high-entropy ceramics was analyzed through high resolution transmission electron microscopy(HRTEM),Raman spectroscopy,far-infrared reflection spectroscopy,and chemical bond *** work provides an effective avenue for designing microwave dielectric materials with low loss to meet the demands of passive components.

关键词： high-entropy ceramics vanadium-based zircon microwavedielectric properties low dielectric loss chemical bond characteristics

A robust multi-VSGs coordinated control strategy for distributed secondary frequency regulation in islanded microgrids

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science China Technological sciences 2025年第3期68卷 335-352页

作者： Jing ZHANG Yong LI Jinjie LIN Sijia HU Yijia CAO Fang LIU Mingmin ZHANG Li HE college of Electrical and information engineering Hunan University Greater Bay Area Institute for Innovation Hunan University college of information science and engineering Central South University college of electronic information and Electrical engineering Changsha University college of information and Electrical engineering Hunan University of Science and Technology

Islanded microgrids(IMGs) offer a viable and efficient energy self-sustaining solution for distributed resources in remote areas. While without utility grid support, the frequency of IMG is susceptible to mismatches between demand and generation. Moreover, IMGs encounter uncertain and nonlinear load disturbances together with system parameter perturbation,which further compromises frequency stability. To this aim, this paper proposes a robust multi-virtual synchronous generators(multi-VSGs) coordinated control strategy for distributed secondary frequency regulation(DSFR) in IMGs, which exhibits minimal model dependency and avoids reliance on global information. Two critical methods are developed:(1) a robust VSG control framework that incorporates the linear active disturbance rejection control(LADRC) technique, which enables the estimation and effective elimination of uncertain load disturbances and system's parameter perturbations;(2) a novel secondorder consensus algorithm-based control law for robust secondary frequency regulation, which is featured with proper power sharing among different participants, suppressed power oscillation caused by response disparities, and reduced reliance on complex communication system. Building on methods(1) and(2), a novel multi-VSGs coordinated control strategy is proposed, providing a robust solution for IMG's frequency restoration, and its dynamic characteristics are explored in detail. The correctness and effectiveness of the proposal are verified by both simulation and the hardware-in-the-loop(HIL) experiment results across typical scenarios.

关键词： islanded microgrid (IMG) distributed secondary frequency regulation (DSFR) robust multi-VSGs coordinated control linear active disturbance rejection control (LADRC)

Experimental demonstration of 220-GHz terahertz signals wireless transmission over 4.6 km

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science China(information sciences) 2025年第1期68卷 386-388页

作者： Yi WEI Jianjun YU Mingxu WANG Xiongwei YANG Qiutong ZHANG Jingwen TAN Bing ZHANG Ying WU Yang HAN Peng TIAN Wen ZHOU Kaihui WANG Feng ZHAO State Key Laboratory of ASIC and System Key Laboratory for Information Science of Electromagnetic Waves (MoE)School of Information Science and Technology Fudan University School of electronic engineering Xi'an University of Posts and Telecommunications

The advancement of terahertz (THz) communication technology drives the evolution of wireless communication systems,offering novel pathways and technical means for the development of future 6G communication *** wireless communication systems are often constrained by bandwidth limitations of electronic devices in high frequency ***,THz communication technology leverages the characteristics of electromagnetic waves to transcend these limitations,enabling communication athigher frequencies and wider bandwidths.

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