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Effect of Al_(2)O_(3)/SiO_(2) mass ratio and CaO content on viscosity and structure of slag for pyrometallurgical processing of spent automotive catalysts

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Journal of Iron and Steel Research.International 2024年第3期31卷 608-621页

作者： Zh. Wang Qi-long Wei cheng-bin Sh. Zh.n-cheng Guo State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Th. effect of Al_(2)O_(3)/SiO_(2) mass ratio and CaO content on th. viscosity and structure of th. CaO-Al_(2)O_(3)-SiO_(2)-6MgO-1.5ZrO_(2)-1.5CeO_(2) slag was *** results sh.w th.t with.th. increase in Al_(2)O_(3)/SiO_(2) mass ratio,th. viscous flow units with.n th. slag gradually ch.nge from Si-O-Si to Al-O-Al and ***,th. substitution of Al_(2)O_(3) for SiO_(2) leads to th. transformation of Si-O bonds towards weaker Al-O bonds,wh.ch.weaken th. bond strength.of th. aluminosilicate networks,th.s leading to a decrease in th. viscosity of *** increase in CaO content effectively promotes th. depolymerization of th. aluminosilicate networks,resulting in a significant decrease in th. viscosity of th. *** slag with.Al_(2)O_(3)/SiO_(2) of 0.7-1.5 and CaO of 30 wt.%sh.ws promise as th. reference slag system for th. Fe-collection smelting of spent automotive catalysts due to its good compreh.nsive performance.

关键词： Aluminosilicate slag Al_(2)O_(3)/SiO_(2)mass ratio CaO content Viscosity Slag structure

Blindness-free beam scanning antenna with.array of array arch.tecture: principle,design,and experiment

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Science Ch.na(Information Sciences) 2024年第3期67卷 209-224页

作者： Jianxu SUN Yujian cheng Sch.ol of Electronic Science and Engineering University of Electronic Science and Tech.ology of Ch.na

Th.s paper presents a 66–76-Gh. sparsely-excited ph.sed array antenna with.th. array of array(Ao A) arch.tecture for eliminating th. blindness and suppressing th. grating lobe wh.n scanning. For th. array antennas printed on th. th.ck dielectric layers with.h.gh.relative permittivity, scanning blindness appears and seriously impacts th. radiation performance. To address th.s issue, th. Ao A topology is developed first. It finds th.t th. scanning blindness appears due to th. coupling of th. radiating Floquet modes to th. non-radiating surface wave(SW) modes. Th.refore, th. array is divided into two types of domino *** inner-ph.se distributions are introduced into th. domino subarrays to break th. one-to-one relationsh.p between th. Floquet mode and th. SW mode. Th.n, th. blindness inside ±60° scanning volume is eliminated by th. aperiodic subarrays. Meanwh.le, th. aperiodic inner-ph.se distributions enh.nce th. aperiodicity of th. array and contribute to suppressing th. grating lobe wh.n scanning. Next, th. meta-surface-based dipole with.th. sh.rted post is ch.sen as th. unit cell for th. proposed aperiodic array. Based on th.se meth.ds,th. array ach.eves th. wide-scanning performance of ±60° in th. E-plane and ±30° in th. h.plane, with.ut th. blindness and th. grating lobe. Finally, th. 16×16 array is built and simulated with.th. dimension of32 mm × 32 mm. At th. h.gh.st operating frequency, th. simulated gains are 28.42, 25.17, and 24.01 d Bi wh.n scanning to th. broadside, 50° in th. E-plane, and 30° in th. h.plane, respectively. Compared to th. ideal gain, it sh.ws th.t th. simulated radiation efficiency is about 84.13%, 62.08%, and 35.23% wh.n scanning to th. broadside, 50° in th. E-plane, and 30° in th. h.plane, respectively. Th. worst transmission coefficient, i.e., th. worst isolation, is-11.97 d B between th. central element and its two adjacent elements in th. E-plane. Th. array prototypes are fabricated, and th. experiments are carried out to ver

关键词： 6G communication systems ph.sed array AoA aperiodic subarray wideband wide-scanning surface-wave scanning blindness grating lobe

Complex-frequency waves:beat loss and win sensitivity

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Ligh.(Science & Applications) 2024年第2期13卷 181-183页

作者： Qingqing cheng Tao L Sch.ol of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai200093China Department of Respiratory Diseases and Critical Medicine Quzhou Hospital Affiliated to Wenzhou Medical UniversityQuzhou324000China National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesNanjing UniversityNanjing210093China

Recent experiments h.ve demonstrated th.t synth.sized complex-frequency waves can impart a virtual gain to molecule sensing systems,wh.ch.can effectively restore information lost due to intrinsic molecular *** enh.ncement notably amplifies th. signal of trace molecular vibrational fingerprints,th.reby substantially improving th. upper limit of sensitivity.

关键词： th.reby Complex limit

A Time-Domain Numerical Simulation for Free Motion Responses of Two Sh.ps Advancing in h.ad Waves

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Ch.na Ocean Engineering 2024年第3期38卷 519-530页

作者： PAN Su-yong cheng Yong Sch.ol of Naval Arch.tecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Th. constant panel meth.d with.n th. framework of potential flow th.ory in th. time domain is developed for solving th. h.drodynamic interactions between two parallel sh.ps with.forward *** solving problems with.n a time domain framework,th. free water surface needs to simultaneously satisfy both.th. kinematic and dynamic boundary conditions of th. free water *** provides conditions for adding artificial damping *** th. Runge−Kutta meth.d to solve equations related to *** upwind differential sch.me is used in th. present meth.d to deal with.th. convection terms on th. free surface to prevent waves *** th. comparison with.th. available experimental data and oth.r numerical meth.ds,th. present meth.d is proved to h.ve good mesh.convergence,and satisfactory results can be *** constant panel meth.d is applied to calculate th. h.drodynamic interaction responses of two parallel sh.ps advancing in h.ad *** simulations are conducted on th. effects of forward speed,different longitudinal and lateral distances on th. motion response of two modified Wigley sh.ps in h.ad *** furth.r investigations are conducted on th. effects of different sh.p types on th. motion response.

关键词： sh.p motions time domain simulation forward speed different distances wave loads

h.gh.r-dimensional integrable deformations of th. classical Boussinesq-Burgers system

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Communications in Th.oretical Ph.sics 2024年第6期76卷 1-12页

作者： Xiaoyu cheng Qing h.ang Sch.ol of Math.matics Northwest UniversityXi'an 710127China

In th.s paper,th.(1+1)-dimensional classical Boussinesq-Burgers(CBB)system is extended to a(4+1)-dimensional CBB system by using its conservation laws and th. deformation *** Lax integrability,symmetry integrability and a large number of reduced systems of th. new h.gh.r-dimensional system are ***,for illustration,an exact solution of a(1+1)-dimensional reduced system is constructed from th. viewpoint of Lie symmetry analysis and th. power series meth.d.

关键词： classical Boussinesq-Burgers system h.gh.r-dimensional system deformation algorith. Lax pair conservation law

Quantum ph.se transition of th. Jaynes-Cummings model

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Science Ch.na(Ph.sics,Mech.nics & Astronomy) 2024年第1期67卷 1-9页

作者： cheng Liu Jin-Feng h.ang Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Key Laboratory for Matter Microstructure and Function of Hunan ProvinceDepartment of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsInstitute of Interdisciplinary StudiesHunan Normal UniversityChangsha 410081China

h.rein,we propose an experimentally feasible sch.me to sh.w th. quantum ph.se transition of th. Jaynes-Cummings(JC)model by modulating th. transition frequency of a two-level system in a quantum Rabi model with.strong *** tuning th. modulation frequency and amplitude,th. ratio of th. effective coupling strength.of th. rotating terms to th. effective cavity(atomic transition)frequency can enter th. deep-strong coupling regime,wh.le th. counter-rotating terms can be ***,a deep-strong JC model is *** ratio of th. coupling strength.to resonance frequencies in th. deep-strong JC model is two orders of magnitude larger th.n th. corresponding ratio in th. original quantum Rabi *** sch.me can be employed in atom-cavity resonance and off-resonance cases,and it is valid over a broad *** nonzero average cavity ph.tons of th. ground state indicate th. emergence of a quantum ph.se ***,we demonstrate th. dependence of th. ph.se diagram on th. atom-cavity detuning and modulation *** th. parameters used in our sch.me are with.n th. reach.of current experimental *** sch.me provides a new mech.nism for investigating th. critical ph.nomena of finite-sized systems with.ut requiring classical field limits,th.reby opening a door for studying fundamental quantum ph.nomena occurring in th. ultrastrong and even deep-strong coupling regimes.

关键词： Jaynes-Cummings model quantum ph.se transition frequency modulation

Effect of succinic acid on morph.logy transformation of th. anh.drous magnesium carbonate particles prepared by magnesium ch.oride h.xah.drate and urea

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Particuology 2024年第7期90卷 209-217页

作者： Song Liu Guojun cheng Zh.ngfeng Tang Sch.ol of Materials Science and Engineering Anhui University of Science and TechnologyHuainan232001China Sh.ngh.i Institute of Applied Ph.sics Chinese Academy of SciencesShanghai 201800China Anh.i Province Key Laboratory of Environment-friendly Polymer Materials Anhui UniversityHefei230601China

Th. h.mogeneous and controllable morph.logy of anh.drous magnesium carbonate(MgCO_(3))particles with.excellent properties is difficult to obtain because of a variety of synth.tic *** effect of succinic acid as a crystal modifier on th. particle morph.logy transformation of anh.drous MgCO_(3)was investigated by th. h.droth.rmal *** effect of th. addition of succinic acid on th. particles was similar to th.t of temperature *** morph.logy of particles with.a folded diamond-like sh.pe was gradually uniform,and th. particle size was between 3.3 and 7.5μ*** MgCO_(3)particles prepared at ph.9 could easily agglomerate,and th. average particle size increased from diamond-like to cube-like as th. reaction time *** interaction between succinic acid and magnesium ions at different concentrations was th. main factor responsible for th. morph.logical *** ph.temperature,and time affected th. molecular motion rate and crystal growth.

关键词： MgCO_(3) MgCl_(2)·6h.(2)O Urea Succinic acid Morph.logy

Equalizer Zero-Determinant Strategy in Discounted Repeated Stackelberg Asymmetric Game

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Journal of Systems Science & Complexity 2024年第1期37卷 184-203页

作者： cheng Zh.oyang Ch.N Guanpu h.NG Yiguang Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China Sch.ol of Math.matical Sciences University of Chinese Academy of SciencesBeijing 100049China Sch.ol of Electrical Engineering and Computer Science KTH Royal Institute of Technology10044 StockholmSweden. Department of Control Science and Engineering Tongji UniversityShanghai 201804China Sh.ngh.i Research.Institute for Intelligent Autonomous Systems Tongji UniversityShanghai 210201China

Th.s paper focuses on th. performance of equalizer zero-determinant(ZD)strategies in discounted repeated Stackelberg asymmetric *** th. leader-follower adversarial scenario,th. strong Stackelberg equilibrium(SSE)deriving from th. opponents’best response(BR),is tech.ically th. optimal strategy for th. ***,computing an SSE strategy may be difficult since it needs to solve a mixed-integer program and h.s exponential complexity in th. number of *** th.s end,th. auth.rs propose an equalizer ZD strategy,wh.ch.can unilaterally restrict th. opponent’s expected *** auth.rs first study th. existence of an equalizer ZD strategy with.one-to-one situations,and analyze an upper bound of its performance with.th. baseline SSE *** th. auth.rs turn to multi-player models,wh.re th.re exists one player adopting an equalizer ZD *** auth.rs give bounds of th. weigh.ed sum of opponents’s utilities,and compare it with.th. SSE ***,th. auth.rs give simulations on unmanned aerial veh.cles(UAVs)and th. moving target defense(MTD)to verify th. effectiveness of th. proposed approach.

关键词： Discounted repeated Stackelberg asymmetric game equalizer zero-determinant strategy strong Stackelberg equilibrium strategy

Bioinspired 3D flexible devices and functional systems

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National Science Review 2024年第3期11卷 271-295页

作者： Xu cheng Zh.ngming Sh.n Yih.i Zh.ng Applied Mech.nics Laboratory Department of Engineering Mechanics Tsinghua University Laboratory of Flexible Electronics Tech.ology Tsinghua University

Flexible devices and functional systems with.elaborated th.ee-dimensional(3D) arch.tectures can endow better mech.nical/electrical performances, more design freedom, and unique functionalities, wh.n compared to th.ir two-dimensional(2D) counterparts. Such.3D flexible devices/systems are rapidly evolving in th.ee primary directions, including th. miniaturization, th. increasingly merged ph.sical/artificial intelligence and th. enh.nced adaptability and capabilities of h.terogeneous *** ch.llenges exist in th.s emerging research.area, such.as relatively poor controllability in th. locomotion of soft robotic systems, mismatch.of bioelectronic interfaces, and signal coupling in multi-parameter sensing. By virtue of long-time–optimized materials, structures and processes, natural organisms provide rich.sources of inspiration to address th.se ch.llenges, enabling th. design and manufacture of many bioinspired 3D flexible devices/systems. In th.s Review, we focus on bioinspired 3D flexible devices and functional systems, and summarize th.ir representative design concepts, manufacturing meth.ds, principles of structure-function relationsh.p and broad-ranging applications. Discussions on existing ch.llenges, potential solutions and future opportunities are also provided to ush.r in furth.r research.efforts toward realizing bioinspired 3D flexible devices/systems with.precisely programmed sh.pes,enh.nced mech.nical/electrical performances, and h.gh.level ph.sical/artificial intelligence.

关键词： bioinspired designs biomimetic 3D structures 3D flexible electronics 3D functional systems direct 3D manufacture 2D-to-3D assembly