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Various topological phases and their abnormal effects of topological acoustic metamaterials

Interdisciplinary Materials 2023年第2期2卷 179-230页

作者： Yan-Feng chen ze-guo chen Hao Ge cheng He Xin Li Ming-Hui Lu Xiao-chen Sun Si-Yuan Yu Xiujuan Zhang National Laboratory of Solid-State Microstructures&Department of Materials Science and Engineering Nanjing UniversityNanjingChina Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjingChina Jiangsu Key Laboratory of Artificial Functional Materials Nanjing UniversityNanjingChina School of Materials Science and Intelligent Engineering Nanjing UniversitySuzhouChina School of Mechanical Engineering Nanjing University of Science and TechnologyNanjingChina

The last 20 years have witnessed growing impacts of the topological concept on the branches of physics,including materials,electronics,photonics,and *** describes objects with some global invariant property under continuous deformation,which in mathematics could date back to the 17th century and mature in the 20th *** physics,it successfully underpinned the physics of the Quantum Hall effect in *** date,topology has been extensively applied to describe topological phases in acoustic *** artificial structures,acoustic metamaterials could be well theoretically analyzed,on-demand designed,and easily fabricated by modern techniques,such as three-dimensional *** new theoretical topological models were first discovered in acoustic metamaterials analogous to electronic counterparts,associated with novel effects for acoustics closer to *** this review,we focused on the concept of topology and its realization in airborne acoustic crystals,solid elastic phononic crystals,and surface acoustic wave *** also introduced emerging concepts of non-Hermitian,higher-order,and Floquet topological insulators in *** has been shown that the topology theory has such a powerful generality that among the disciplines from electron to photon and phonon,from electronic to photonics and acoustics,from acoustic topological theory to acoustic devices,could interact and be analogous to fertilize fantastic new ideas and prototype devices,which might find applications in acoustic engineering and noisevibration control engineering in the near future.

关键词： acoustic materials robust propagation topological acoustic metamaterials topological phases

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Plasma L-ENK, AVP, ANP and serum gastrin in patients with syndrome of Liver-Qi-stagnation

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World Journal of Gastroenterology 1999年第1期5卷 66-68页

作者： chen ze Qi, chen guo Lin, LI Xue Wen, ZHAO Yu Qiu and SHI Lin Jie

AIM To investigate the pathophysiologic basis of syndrome of Liver Qi stagnation and parameters for clinical differentiation. METHODS Plasma L ENK, AVP, ANP and serum gastrin were determined by RIA in 84 patients with neurasthenia, mastodynia, chronic gastritis, and chronic cholecystitis presenting the same syndrome of Liver Qi stagnation in traditional Chinese medicine (TCM). Healthy subjects served as controls in comparison with patients having the same syndrome but with different diseases. RESULTS Among the patients with Liver Qi stagnation, the plasma L ENK, ANP and gastrin levels were 38 83ng/L ± 6 32ng/L , 104 11ng/L ± 29 01ng/L and 32 20ng/L ± 6 68ng/L , being significantly lower than those in the healthy controls ( t =3 34, 6 17, 4 48; P 0 05. CONCLUSION The syndrome of Liver Qi stagnation is closely related to the emotional modulatory abnormality of the brain, with decrease of plasma L ENK, ANP and gastrin, and increase of plasma AVP as the important pathophysiologic basis.

关键词： Syndrome of Liver qi stagnation leucine enkephalin/blood arginine vasopressin/blood atrial natural polypeptide/blood gastrin/blood

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Multi-dimensional wave steering with higher-order topological phononic crystal

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Science Bulletin 2021年第17期66卷 1740-1745,M0003页

作者： Changqing Xu ze-guo chen Guanqing Zhang Guancong Ma Ying Wu Division of Computer Electrical and Mathematical Science and EngineeringKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Department of Physics Hong Kong Baptist UniversityHong KongChina

The recent discovery and realizations of higher-order topological insulators enrich the fundamental studies on topological ***,we report three-dimensional(3D)wave-steering capabilities enabled by topological boundary states at three different orders in a 3D phononic crystal with nontrivial bulk topology originated from the synergy of mirror symmetry of the unit cell and a non-symmorphic glide symmetry of the *** multitude of topological states brings diverse possibilities of wave *** judicious engineering of the boundary modes,we experimentally demonstrate two functionalities at different dimensions:2D negative refraction of sound wave enabled by a firstorder topological surface state with negative dispersion,and a 3D acoustic interferometer leveraging on second-order topological hinge *** work showcases that topological modes at different orders promise diverse wave steering applications across different dimensions.

关键词： Higher-order topological insulator Topological states Negative refraction 3D acoustic interferometer

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Topological boundary states transport in synthetic four-dimensional acoustic system

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Science Bulletin 2022年第19期67卷 1950-1953页

作者： Chudong Xu Taotao Zheng Hao Ge Wei Wang ze-guo chen Ming-Hui Lu Yan-Feng chen College of Electronic Engineering(College of Artificial Intelligence) South China Agricultural UniversityGuangzhou 510642China College of Engineering and Applied Sciences and National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093China Department of Physics Hong Kong Baptist UniversityHong KongChina School of Materials Science and Intelligent Engineering Nanjing UniversitySuzhou 215163China Jiangsu Key Laboratory of Artificial Functional Materials Nanjing 210093China

Topological phase is an important development and unexplored degree of freedom of traditional band theory[1].Generally,it manifests in physics through the boundary states revealed by the bulkedge *** bulk topology implies various low-dimensional states at the boundary,giving extraordinary approaches to manipulate *** structure that encodes the band topology is the system associated with space–time evolution,such as Floquet topological insulator[2,3].Its quasistatic limit involves time-dependent dynamic adiabatic evolution[4,5].However,dynamic evolution is challenging as it requires fast modulation to overcome the dissipation of state before it is pumped from one edge to another[6].An alternative approach is to use an additional degree of freedom to replace the role of time,and an illuminating system is the weakly coupled waveguides,whose governing equation can be directly mapped to Schrodinger equation with time modulation replaced by wave propagation along the ***,such strategy has been largely explored to realize the pumping of topological boundary states in optics[7,8]and elastic wave[9,10].However,the strategy for acoustics is subtly different as the coupling of the acoustic waveguides is not weak for the fundamental waveguide *** exploring the possibility to realize two-dimensional(2D)topological acoustic pumping in a continuous regime remains an open question.

关键词：三维结构人工合成鲁棒性四维声学系统声波导拓扑真实空间

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Blood exosomal micro ribonucleic acid profiling reveals the complexity of hepatocellular carcinoma and identifies potential biomarkers for differential diagnosis

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World Journal of Gastrointestinal Oncology 2020年第10期12卷 1195-1208页

作者： Lang-Qing Sheng Jia-Rong Li Hao Qin Ling Liu Da-Dong Zhang Qi Zhang Meng-Li Huang Xiao-Li Li Xiao-Ya Xu Yang-Nian Wei Zi-Shuo chen Hui Luo Ji-Yang Zhang cheng-Hui Zhou Hao chen ze-guo chen Fu-Gen Li Nian-Feng Li Department of Hepatobiliary and Pancreatic Surgery Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina Department of Biliopancreatic Surgery Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina Research and Development Institute of Precision Medicine 3D Medicines Inc.Shanghai 201114Hunan ProvinceChina The Medical Department 3D Medicines Inc.Shanghai 201114China

BACKGROUND Hepatocellular carcinoma(HCC)is one of the leading causes of cancer-related deaths worldwide,but there is a shortage of effective biomarkers for its *** To explore blood exosomal micro ribonucleic acids(miRNAs)as potential biomarkers for HCC *** The principal component analysis suggested that daily alcohol consumption could alter the blood exosomal miRNA profiles of hepatitis B virus positive non-HCC patients through miR-3168 and *** miRNA profiles also revealed the tumor stages of HCC *** expression of miR-455-5p and miR-30c-5p,which significantly correlated with better overall survival in tumor tissues,could also be detected in blood *** pairs of miRNAs(miR-584-5p/miR-106-3p and miR-628-3p/miR-941)showed a 94.1%sensitivity and 68.4%specificity to differentiate HCC patients from non-HCC *** specificity of the combination was substantially influenced by alcohol consumption *** This study suggested that blood exosomal miRNAs can be used as new noninvasive diagnostic tools for ***,their accuracy could be affected by tumor stage and alcohol consumption habits.

关键词： Blood exosomal micro ribonucleic acids Biomarker Differential diagnosis Alcohol consumption habit Hepatocellular carcinoma Bioinformatics

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再生细骨料砂浆多孔砖砌体抗剪性能试验研究

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科学技术与工程 2017年第3期17卷 288-292,297页

作者：秦拥军郭泽思陈振新疆大学建筑工程学院1 乌鲁木齐830047 中铁十局第八工程公司泰安271000

通过对乌鲁木齐地区再生砂浆多孔砖砌体的抗剪性能进行对比试验研究,发现再生砂浆砌体抗剪强度低于天然砂浆砌体;但随着砂浆强度等级的提升,再生砂浆砌体抗剪强度的增长相对缓慢。对再生砂浆砌体抗剪强度实测值与规范规定的平均值和设... 详细信息

通过对乌鲁木齐地区再生砂浆多孔砖砌体的抗剪性能进行对比试验研究,发现再生砂浆砌体抗剪强度低于天然砂浆砌体;但随着砂浆强度等级的提升,再生砂浆砌体抗剪强度的增长相对缓慢。对再生砂浆砌体抗剪强度实测值与规范规定的平均值和设计值进行对比分析,提出了适用于再生细骨料砂浆多孔砖砌体抗剪强度的计算公式。

关键词：再生砂浆再生细骨料砌体抗剪试验抗剪计算公式

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MXene Hybridized Polymer with Enhanced Electromagnetic Energy Harvest for Sensitized Microwave Actuation and Self-Powered Motion Sensing

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NANO-MICRO LETTERS 2025年第1期17卷 1-15页

作者： Wang, Yu-ze Wang, Yu-Chang Liu, Ting-Ting Zhao, Quan-Liang Li, chen-Sha Cao, Mao-Sheng Beijing Inst Technol Sch Mat Sci & Engn Beijing 100081 Peoples R China Peking Univ Sch Mat Sci & Engn Beijing 100871 Peoples R China North China Univ Technol Sch Mech & Mat Engn Beijing 100144 Peoples R China Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China

Polymeric microwave actuators combining tissue-like softness with programmable microwave-responsive deformation hold great promise for mobile intelligent devices and bionic soft robots. However, their application is challenged by restricted electromagnetic sensitivity and intricate sensing coupling. In this study, a sensitized polymeric microwave actuator is fabricated by hybridizing a liquid crystal polymer with Ti3C2Tx (MXene). Compared to the initial counterpart, the hybrid polymer exhibits unique space-charge polarization and interfacial polarization, resulting in significant improvements of 230% in the dielectric loss factor and 830% in the apparent efficiency of electromagnetic energy harvest. The sensitized microwave actuation demonstrates as the shortened response time of nearly 10 s, which is merely 13% of that for the initial shape memory polymer. Moreover, the ultra-low content of MXene (up to 0.15 wt%) benefits for maintaining the actuation potential of the hybrid polymer. An innovative self-powered sensing prototype that combines driving and piezoelectric polymers is developed, which generates real-time electric potential feedback (open-circuit potential of similar to 3 mV) during actuation. The polarization-dominant energy conversion mechanism observed in the MXene-polymer hybrid structure furnishes a new approach for developing efficient electromagnetic dissipative structures and shows potential for advancing polymeric electromagnetic intelligent devices.

关键词： Microwave absorption Electromagnetic response Energy harvest Self-sensing Soft actuator

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Tranylcypromine upregulates Sestrin 2 expression to ameliorate NLRP3-related noise-induced hearing loss

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Neural Regeneration Research 2025年第5期20卷 1483-1494页

作者： Xihang chen Zhifeng chen Menghua Li Weiwei guo Shuolong Yuan Liangwei Xu Chang Lin Xi Shi Wei chen Shiming Yang Senior Department of Otolaryngology Head and Neck Surgery Chinese PLA General HospitalChinese PLA Medical SchoolBeijingChina State Key Laboratory of Hearing and Balance Science BeijingChina National Clinical Research Center for Otolaryngologic Diseases BeijingChina Key Laboratory of Hearing Science Ministry of EducationBeijingChina Beijing Key Laboratory of Hearing Impairment Prevention and Treatment BeijingChina Department of Otorhinolaryngology Head and Neck Surgery The First Affiliated Hospital of Fujian Medical UniversityFuzhouFujian ProvinceChina Department of Otolaryngology Head and Neck Surgery The 940th Hospital of Joint Logistics Support Force of Chinese PLALanzhouGansu ProvinceChina Key Laboratory of Tropical Biological Resources of Ministry of Education School of Pharmaceutical SciencesHainan UniversityHaikouHainan ProvinceChina Academician Workstation of Hainan University School of Pharmaceutical SciencesYazhou BaySanyaHainan ProvinceChina

Noise-induced hearing loss is the primary non-genetic factor contributing to auditory ***,there are currently no effective pharmacological interventions for patients with noise-induced hearing ***,we present evidence suggesting that the lysine-specific demethylase 1 inhibitor–tranylcypromine is an otoprotective agent that could be used to treat noise-induced hearing loss,and elucidate its underlying regulatory *** established a mouse model of permanent threshold shift hearing loss by exposing the mice to white broadband noise at a sound pressure level of 120 d B for 4 *** found that tranylcypromine treatment led to the upregulation of Sestrin2(SESN2)and activation of the autophagy markers light chain 3B and lysosome-associated membrane glycoprotein 1 in the cochleae of mice treated with *** noise exposure group treated with tranylcypromine showed significantly lower average auditory brainstem response hearing thresholds at click,4,8,and 16 k Hz frequencies compared with the noise exposure group treated with *** findings indicate that tranylcypromine treatment resulted in increased SESN2,light chain 3B,and lysosome-associated membrane glycoprotein 1 expression after noise exposure,leading to a reduction in levels of 4-hydroxynonenal and cleaved caspase-3,thereby reducing noise-induced hair cell ***,immunoblot analysis demonstrated that treatment with tranylcypromine upregulated SESN2 expression via the autophagy *** treatment also reduced the production of NOD-like receptor family pyrin domaincontaining 3(NLRP3)*** conclusion,our results showed that tranylcypromine treatment ameliorated cochlear inflammation by promoting the expression of SESN2,which induced autophagy,thereby restricting NLRP3-related inflammasome signaling,alleviating cochlear hair cell loss,and protecting hearing *** findings suggest that inhibiting lysine-specific demethylase 1 is a

关键词： 4-hydroxynonenal apoptosis autophagy cleaved caspase-3 inflammation NOD-like receptor family pyrin domain-containing 3(NLRP3) noise-induced hearing loss oxidative stress Sestrin2 tranylcypromine

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Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： Mei Zhang Wenhao Li Yangfei chen Yang Jiang Xiaofei guo Han Dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

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Plasmonic tandem heterojunctions enable high-efficiency charge transfer for broad spectrum photocatalytic hydrogen production

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Journal of Energy Chemistry 2025年第1期100卷 710-720页

作者： Wenxuan chen Xiu-Qing Qiao guo Hui Bojing Sun Dongfang Hou Meidi Wang Xueqian Wu Tao Wu Dong-Sheng Li College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Hubei Three Gorges Laboratory College of Chemistry and Materials Science and Guangdong Provincial Key Laboratory of Supramolecular Coordination Chemistry Jinan University

Rational engineering of semiconductor photocatalysts for efficient hydrogen production is of great significance but still challenging,primarily due to the limitations in charge transfer ***,a fascinating plasmonic tandem heterojunction with the hc-CdS/Mo2C@C heterostructure is aimfully prepared for effectively promoting the charge separation kinetics of the CdS photocatalyst via the synergistic strategy of phase junction,Schottky junction,and photothermal *** difference in atomic configuration between cubic-CdS （c-CdS） and hexagonal-CdS （h-CdS） leads to effective charge separation through a typical Ⅱ charge transfer mechanism,and plasmonic Schottky junction further extracts the electrons in the hc-CdS phase junction to realize gradient charge ***,the photothermal effect of Mo2C@C helps to expand the light absorption,accelerate charge transfer kinetics,and reduce the hydrogen evolution energy *** carbon layer provides a fast channel for charge transfer and protects the photocatalyst from *** a result,the optimized hc-CMC photocatalyst exhibits a significantly high photocatalytic H2production activity of 28.63 mmol/g/h and apparent quantum efficiency of 61.8%,surpassing most of the reported *** study provides a feasible strategy to enhance the charge transfer kinetics and photocatalytic activity of CdS by constructing plasmonic tandem heterogeneous junctions.

关键词： Heterojunctions LSPR Photocatalyst Phase junction Schottky junction Photothermal effect

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