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Anomalous quality factor evolution of induced transparency in a virtualized coupled-oscillator system

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 148-155页

作者： Yunhan Yang Han Jia Tuo liu Yuzhen Yang jun Yang Key Laboratory of Noise and Vibration Research Institute of Acoustics Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Acoustics Institute of Acoustics Chinese Academy of Sciences

The phenomenon of induced transparency, characterized by a high quality(Q) factor, holds significant importance in the fields of high-precision sensing, energy storage and wave manipulation. Conventional transparency systems are often constrained by the limited experimentally accessible parameter space and the lack of independent control over intrinsic parameters, thereby hindering advanced research on high-Q effects. Here we propose a virtualized coupled-oscillator system that enables reconfigurable induced transparency in the reflection spectrum. By virtually incorporating a pair of coupled oscillators into an individual acoustic meta-atom, we achieve the manipulation of induced transparency in a decoupled, wide-ranging, and elaborate manner. Exploiting the diverse evolutions across the intrinsic parameter space, we show experimentally a counter-intuitive increase in the Q-factor of the transparency window, which is attributed to the enhanced dissipation of the bright ***, a constant group delay at the center frequency is observed accompanying this evolution. Our work demonstrates an intriguing platform as well as a novel strategy to engineer high-Q induced transparency phenomenon, and paves the way towards applications in programmable acoustic sensors, filters and slow-wave devices.

关键词： induced transparency acoustic meta-atom high quality-factor scattering programmable intrinsic parameter

PI3K/AKT signaling and neuroprotection in ischemic stroke:molecular mechanisms and therapeutic perspectives

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Neural Regeneration Research 2025年第10期20卷 2758-2775页

作者： Tianlong liu Xiaolin Li Xiaowei Zhou Wei Chen Aidong Wen Minna liu yi Ding Department of Pharmacy Xijing HospitalFourth Military Medical UniversityXi’anShaanxi ProvinceChina Department of Pharmacy The 940 Hospital of Joint Logistics Support Forces of Chinese PLALanzhouGansu ProvinceChina Department of Pharmacy The 944 Hospital of Joint Logistics Support Forces of Chinese PLAJiuquanGansu ProvinceChina Department of Nephrology The 940 Hospital of Joint Logistics Support Forces of Chinese PLALanzhouGansu ProvinceChina

It has been reported that the PI3K/AKT signaling pathway plays a key role in the pathogenesis of ischemic *** a result,the development of drugs targeting the PI3K/AKT signaling pathway has attracted increasing attention from *** article reviews the pathological mechanisms and advancements in research related to the signaling pathways in ischemic stroke,with a focus on the PI3K/AKT signaling *** key findings include the following:(1)The complex pathological mechanisms of ischemic stroke can be categorized into five major types:excitatory amino acid toxicity,Ca^(2+)overload,inflammatory response,oxidative stress,and apoptosis.(2)The PI3K/AKT-mediated signaling pathway is closely associated with the occurrence and progression of ischemic stroke,which primarily involves the NF-κB,NRF2,BCL-2,mTOR,and endothelial NOS signaling pathways.(3)Natural products,including flavonoids,quinones,alkaloids,phenylpropanoids,phenols,terpenoids,and iridoids,show great potential as candidate substances for the development of innovative anti-stroke medications.(4)Recently,novel therapeutic techniques,such as electroacupuncture and mesenchymal stem cell therapy,have demonstrated the potential to improve stroke outcomes by activating the PI3K/AKT signaling pathway,providing new possibilities for the treatment and rehabilitation of patients with ischemic *** investigations should focus on the direct regulatory mechanisms of drugs targeting the PI3K/AKT signaling pathway and their clinical translation to develop innovative treatment strategies for ischemic stroke.

关键词： apoptosis autophagy inflammation ischemic stroke neuroprotection oxidative stress pathogenesis phosphatidylinositol 3-kinase protein kinase B therapeutics

Observation of topological charge transformations in acoustic vortex using passive periodic systems

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 140-147页

作者： Di-Chao Chen Xie liu Changqing Xu Da-Jian Wu ying Cheng Xiao-jun liu School of Physics and Technology Nanjing Normal University Key Laboratory of Modern Acoustics School of Physics Nanjing University

Vortex transmutation utilizes a periodic system, which not only enables the alteration of the topological charge(TC) of unstable input vortices but also facilitates their transformation into stable structures. This approach is crucial for investigating the characteristics of vortices in various wave systems. Here, we achieve acoustic vortex TC transmutation by employing a welldesigned dual-structured plate external system(DPES). The interactions between the acoustic vortex and the finite-order discrete rotational symmetry lead to the transformation of its topological charge when complete rotational symmetry is broken to Nthorder discrete symmetry. Our results experimentally demonstrate the acoustic vortex TC transmutation based on passive artificial structures, enabling numerous applications in particle manipulation and information multiplexing as well as advancing our understanding and control over free-space acoustic vortices.

关键词： acoustic vortex topological charge transformation artificial structure

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促进经济正义乃财政之根本职能

经济与管理研究 2011年第7期32卷 116-119页

作者：刘谊军焦丽中南财经政法大学2010级财政与税务学院武汉大学财政金融研究中心武汉大学2010级政治与公共管理学院武汉大学经济与管理学院

中西方各阶段财政职能理论都是特定时代的产物,未充分揭示出财政的本质属性。财政职能应当是财政在社会经济活动中所具有的职责和功能,促进经济正义为财政职能之根本职能,其他职能无一不是从这一根本职能的母体中衍生出来的。整个财政... 详细信息

中西方各阶段财政职能理论都是特定时代的产物,未充分揭示出财政的本质属性。财政职能应当是财政在社会经济活动中所具有的职责和功能,促进经济正义为财政职能之根本职能,其他职能无一不是从这一根本职能的母体中衍生出来的。整个财政职能的结构应当是一个递进的层级系统,并且有一定的逻辑顺序和重点。

关键词：公共财政财政职能经济正义结构

Identifying the dynamic behaviors in complete reconstruction of Co-based complex precatalysts during electrocatalytic oxygen evolution

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Journal of Energy Chemistry 2025年第1期100卷 226-233页

作者： Jingfang Zhang Danyang Wu Linke Cai Youluan Lu Fanpeng Cheng Lijuan Shi Qun yi Yao liu yi Huang Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology School of Chemical Engineering & Pharmacy Wuhan Institute of Technology Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of Education College of Chemistry Central China Normal University College of Materials Science and Engineering Fuzhou University

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction（OER）. Considerable research efforts have shown that self-reconstruction occurs on these nanomaterials under operating conditions of OER process. However, most of them undergo incomplete reconstruction with limited thickness of reconstruction layer, leading to low component utilization and arduous exploration of real catalytic mechanism. Herein, we identify the dynamic behaviors in complete reconstruction of Co-based complexes during OER. The hollow phytic acid（PA） cross-linked CoFe-based complex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability, in favor of the fast and complete reconstruction. A series of experiment characterizations demonstrate that the reconstruction process includes the fast substitution of PA by OH-to form Co（Fe）(OH)xand subsequent potential-driven oxidation to Co（Fe）OOH. The obtained CoFeOOH delivers a low overpotential of 290 mV at a current density of 10 mA cm-2and a long-term *** experiment results together with theory calculations reveal that the Fe incorporation can result in the electron rearrangement of reconstructed CoFeOOH and optimization of their electronic structure,accounting for the enhanced OER activity. The work provides new insights into complete reconstruction of metal-based complexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

关键词： Oxygen evolution reaction

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芬顿反应强化污泥脱水试验及机理研究

环境工程 2017年第4期35卷 55-59页

作者：刘怡君中铁第一勘察设计院集团有限公司西安710043

胞外聚合物(EPS)是影响剩余污泥脱水性能的关键因素。脱水试验过程中,将芬顿试剂和剩余污泥混合,控制芬顿试剂和稀硫酸的投加量,测定剩余污泥的毛细吸收时间和比阻,总结出芬顿反应对剩余污泥脱水性能的影响规律。试验表明:Fenton反应的... 详细信息

胞外聚合物(EPS)是影响剩余污泥脱水性能的关键因素。脱水试验过程中,将芬顿试剂和剩余污泥混合,控制芬顿试剂和稀硫酸的投加量,测定剩余污泥的毛细吸收时间和比阻,总结出芬顿反应对剩余污泥脱水性能的影响规律。试验表明:Fenton反应的最佳条件是pH为3,H_2O_2投加量为12.4g/L,Fe^(2+)投加量为1.5g/L,反应12min后,对应的毛细吸水时间(CST)和污泥比阻(SRF)分别为21s和0.3×1012m/kg。分析表明:Fenton反应能够破坏剩余污泥中EPS的蛋白质和多糖成分,瓦解EPS锁水结构,改善污泥的脱水性能。

关键词： Fenton试剂毛细吸水时间污泥比阻胞外聚合物

使用FA318型并条机生产纯棉针织纱的体会

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上海纺织科技 2006年第7期34卷 35-36页

作者：刘亦军山东滨州环宇纺织科技有限公司山东滨州256000

介绍了FA318型并条机的性能特点,在纺14.6tex纯棉精梳纱时通过对出条速度、隔距、牵伸分配试验,优化工艺配置,获得了满意的效果,并与德国HSR1000、宝花FA313并条机作了对比试验。

关键词：并条机棉纱针织用纱工艺

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浅议营业税改征增值税对售后租回的影响

价格月刊 2013年第10期 91-94页

作者：刘怡君静安区税务局上海200040

营业税改征增值税(下文简称"营改增")给融资租赁业带来了发展机遇,融资租赁业内普遍感受到作为出租人的融资租赁企业自身税负大幅增加、3%即征即退政策无法兑现、售后租回业务增值税抵扣链条中断等问题的存在,如何建立完善的税收环境以... 详细信息

营业税改征增值税(下文简称"营改增")给融资租赁业带来了发展机遇,融资租赁业内普遍感受到作为出租人的融资租赁企业自身税负大幅增加、3%即征即退政策无法兑现、售后租回业务增值税抵扣链条中断等问题的存在,如何建立完善的税收环境以利于该行业健康可持续发展,成为亟待解决的问题。

关键词： "营改增" 售后租回融资租赁承租人出租人

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机构投资者类型与股票市场波动实证研究

软科学 2010年第6期24卷 111-114,119页

作者：刘奕均胡奕明上海交通大学安泰经济与管理学院上海200052

通过2005～2008年我国A股上市公司数据,实证了机构整体持股对于股价波动的影响;在考虑了变量内生性的问题之后,采用2SLS方法检验了机构稳定市场假说。研究同时发现,机构的交易行为和持股机构的数量加剧了市场波动;在对于机构分类的实证... 详细信息

通过2005～2008年我国A股上市公司数据,实证了机构整体持股对于股价波动的影响;在考虑了变量内生性的问题之后,采用2SLS方法检验了机构稳定市场假说。研究同时发现,机构的交易行为和持股机构的数量加剧了市场波动;在对于机构分类的实证研究中发现,保险、社保、信托和一般法人持股的机构显著地稳定了市场波动,而券商持股显著加剧了市场波动,其它类型的机构投资者对于股价波动的作用并不显著。

关键词：机构投资者市场波动 2SLS 机构类型