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Journal of Energy Chemistry 2021年第12期30卷 328-335,I0008页

作者： zi-hao zhu Ze-Long Liang Sheng-Li Hou Yao Xie Yue Ma Yan Zhang Bin Zhao College of Chemistry Nankai UniversityTianjin 300071China

Electroreduction of CO_(2) into formate catalyzed by metal-organic frameworks(MOFs) is a promising avenue to promote the carbon cycle,but the oxygen evolution reaction(OER) process in anode usually limited the reaction ***,a new framework {(Me_(2) NH_(2))[Bi(L)]·4 DMF·2 H_(2) O}_n(V12) was constructed and structurally characterized(L=5,5'-(1,3,6,8-tetraoxo-1,3,6,8-tetrahydrobenzo [lmn][3,8]phenanthroline-2,7-diyl) dibenzene-1,3-dicarboxylic acid;DMF=N,N-dimethylformamide).V12 possesses large one-dimensional channels with the size of 1.5 × 0.7 nm and exhibits good stability in common *** V12 was modified on electrode via electrodeposition,as-synthesized sample exhibits impressive catalytic performance for the transformation of CO_(2) into formate with Faraday efficiency of93.2% and current density of 11.78 mA cm^(-2) at-0.9 V(***).Control experiments revealed that the MOFs electrodeposition strategy significantly improves the charge transfer rate and introduces more structural defects,which promotes the reaction ***,tetra hydroisoquinoline is added as an accelerant in the anode to achieve the simultaneous generation of formate and *** importantly,the cell voltage is reduced from 2.79 to 2.52 V at 10 mA cm^(-2) in a two-electrode system due to more positive reaction *** work provides an enlightening strategy for using MOFs to establish an effective system to achieve CO_(2) reduction while obtaining high value-added oxidation products.

关键词： MOFs Carbon dioxide electroreduction Electrocatalysis Semi-dehydrogenation Electrodeposition

Dynamically tunable multiband plasmon-induced transparency effect based on graphene nanoribbon waveguide coupled with rectangle cavities system

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Chinese Physics B 2022年第8期31卷 440-452页

作者： zi-hao zhu Bo-Yun Wang Xiang Yan Yang Liu Qing-Dong Zeng Tao Wang Hua-Qing Yu School of Physics and Electronic-information Engineering Hubei Engineering UniversityXiaogan 432000China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

A dynamically tunable multiband plasmon-induced transparency(PIT) effect in a series of rectangle cavities coupled with a graphene nanoribbon waveguide system is investigated theoretically and numerically by tuning the Fermi level of the graphene rectangle cavity. A single-PIT effect is realized using two different methods: one is the direct destructive interference between bright and dark modes, and the other is the indirect coupling through a graphene nanoribbon waveguide. Moreover, dual-PIT effect is obtained by three rectangle cavities side-coupled with a graphene nanoribbon *** show that the magnitude of the dual-PIT window can be controlled between 0.21 and 0.74, and the corresponding group index is controlled between 143.2 and 108.6. Furthermore, the triple-PIT effect is achieved by the combination of bright–dark mode coupling and the cavities side-coupled with waveguide mechanism. Thus, sharp PIT windows can be formed, a high transmission is maintained between 0.51 and 0.74, and the corresponding group index is controlled between161.4 and 115.8. Compared with previously proposed graphene-based PIT effects, the size of the introduced structure is less than 0.5 μm2. Particularly, the slow light effect is crucial in the current research. Therefore, a novel approach is introduced toward the realization of optical sensors, optical filters, and slow light and light storage devices with ultra-compact,multiband, and dynamic tunable.

关键词： plasmon-induced transparency(PIT) graphene group index rectangle cavities

Bioengineered skin organoids:from development to applications

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Military Medical Research 2024年第3期11卷 449-466页

作者： zi-Xuan Hong Shun-Tian zhu hao Li Jing-Zhi Luo Yu Yang Yang An Xi Wang Kai Wang Department of Physiology and Pathophysiology School of Basic Medical SciencesState Key Laboratory of Vascular Homeostasis and RemodelingPeking UniversityBeijing 100191China Department of Hepatopancreatobiliary Surgery the Third Affiliated Hospital of Soochow UniversityChangzhou 213000JiangsuChina Department of Plastic Surgery Peking University Third HospitalBeijing 100191China Clinical Stem Cell Research Center Peking University Third HospitalBeijing 100191China State Key Laboratory of Cardiovascular Disease Fuwai HospitalBeijing 100037China Beijing Key Laboratory of Metabolic Disorder Related Cardiovascular Disease Capital Medical UniversityBeijing 100050China

Signifcant advancements have been made in recent years in the development of highly sophisticated skin *** as three-dimensional(3D)models that mimic human skin,these organoids have evolved into complex structures and are increasingly recognized as efective alternatives to traditional culture models and human skin due to their ability to overcome the limitations of two-dimensional(2D)systems and ethical *** inherent plasticity of skin organoids allows for their construction into physiological and pathological models,enabling the study of skin development and dynamic *** review provides an overview of the pivotal work in the progression from 3D layered epidermis to cyst-like skin organoids with ***,it highlights the latest advancements in organoid construction facilitated by state-of-the-art engineering techniques,such as 3D printing and microfuidic *** review also summarizes and discusses the diverse applications of skin organoids in developmental biology,disease modelling,regenerative medicine,and personalized medicine,while considering their prospects and limitations.

关键词： Skin organoid Organoid generation Skin appendage Tissue engineering Disease modelling Regenerative medicine

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神经采样

计算机学报 2017年第6期40卷 1379-1393页

作者：萧子豪朱军清华大学计算机科学与技术系北京100084 清华大学智能技术与系统国家重点实验室北京100084 清华大学类脑计算研究中心北京100084

神经采样是国际上最近提出的一种基于脉冲神经网络动力学的吉布斯采样算法,是一种有希望在类脑硬件上实现贝叶斯概率推断的算法.神经采样的仿生特点包括考虑神经元间通过发放脉冲来传递信息、突触后膜电压和迟滞效应等.该文首先会介绍... 详细信息

神经采样是国际上最近提出的一种基于脉冲神经网络动力学的吉布斯采样算法,是一种有希望在类脑硬件上实现贝叶斯概率推断的算法.神经采样的仿生特点包括考虑神经元间通过发放脉冲来传递信息、突触后膜电压和迟滞效应等.该文首先会介绍国际上在神经采样方面已有的工作,分三小部分:第1部分涉及神经采样的抽象模型,包括其原理和在任意贝叶斯网络中采样的具体模型;第2部分涉及硬件实现,包括用累积发放(I&F)模型近似连续时间神经采样动力学的方法;第3部分通过结合前两部分,涉及用脉冲神经网络动力学训练传统的机器学习模型,并在经典计算机上模拟这个训练过程.第3部分具体包括基于脉冲时间的突触可塑性(STDP)的受限玻尔兹曼机(RBM)的事件驱动相对散度训练算法.最后,我们在训练RBM的相对散度和持续相对散度算法中,用神经采样替代传统的吉布斯采样.该文的工作首先分析了神经采样对初始化状态敏感和混合速度慢的采样特点,然后提出方法消除了这两个采样特点对训练的负面影响.在MNIST数据集上的实验初步显示,基于修正后的神经采样的训练算法能恢复跟传统基于吉布斯采样的算法相似的重构效果.目前在机器学习领域,基于概率的学习算法已发展成主流.神经采样方面的工作为在类脑硬件上实现低能耗的概率模型计算提供方法,未来有希望被用于提高移动设备的智能水平.

关键词：脉冲神经网络神经采样马尔可夫链蒙特卡洛受限玻尔兹曼机类脑硬件人工智能

Broken Time-Reversal Symmetry in Superconducting Partially Filled Skutterudite Pr1-δPt4Ge12

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Chinese Physics Letters 2019年第10期36卷 72-76页

作者： Jia-Wei Zang Jian Zhang zi-hao zhu Zhao-Feng Ding Kevin Huang Xiao-Ran Peng Adrian DHillier Lei Shu State Key Laboratory of Surface Physics Department of PhysicsFudan UniversityShanghai 200433 Geballe Laboratory for Advanced Materials Stanford UniversityStanfordCA 94305USA ISIS Facility STFC Rutherford Appleton LaboratoryHarwell Science and Innovation CampusChiltonDidcotOxon OX110QXUnited Kingdom Collaborative Innovation Center of Advanced Microstructures Nanjing 210093

Time reversal symmetry(TRS)is a key symmetry for classification of unconventional superconductors,and the violation of TRS often results in a wealth of novel *** we report the synthesis and superconducting properties of the partially filled skutterudite Pr1-δ*** results from x-ray diffraction and magnetization measurements show that the[Pt4 Ge12]cage-forming structure survives and bulk superconductivity is preserved below the superconducting transition temperature Tc = 7.80 *** temperature dependence of both the upper critical field and the electronic specific heat can be described in terms of a two-gap model,providing strong evidence of multi-band *** breaking is observed using zero Held muon-spin relaxation experiments,and the magnitude of the spontaneous field is nearly half of that in PrPt4Ge12.

关键词： properties filled breaking

Enhancing force sensing in a squeezed optomechanical system with quantum nondemolition measurement

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Communications in Theoretical Physics 2024年第1期76卷 49-60页

作者： Shi-Lei Chao zi-hao Li Xin-You Lü School of Physics Huazhong University of Science and Technology430074 WuhanChina

A theoretical scheme is proposed to enhance the sensitivity of force sensors with quantum nondemolition measurement(QND)in an optomechanical setup assisted by four-tone optical driving and an optical parametric amplifier(OPA).With the help of special drive,the system can be simplified as the typical type of QND for force sensing,so that the backaction noise can be evaded to surpass the standard quantum ***,the added noise can be suppressed owing to the modified optical susceptibility resulting from the *** introducing two oscillators coupling with two charged bodies respectively,the signal can be enhanced with the nonlinearity caused by Coulomb interaction,while the noise presents an exponential ***,considering the homodyne detection effect,the range of system parameters and frequency bands will be *** present investigation may provide a route toward simultaneously evading backaction noise,reducing the mechanical thermal noise,and enhancing the external signal,which can be an alternative design for sensitive devices.

关键词： force sensing optical parametric amplifier quantum non-demolition measurement optomechanical system

Property evolution and service life prediction of novel metallic materials for future lunar bases

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Rare Metals 2024年第10期43卷 5318-5331页

作者： Sen-Kuan Meng Rui-Song zhu Hong-Liang Zheng Tong Gao Shi-hao Jiang Wen-hao Wang Shu-hao Zhang zi-Yuan Zhao Xuan Ge Wei-Min Wang Li-Na Hu Zheng Wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) School of Materials Science and EngineeringShandong University Department of Chemistry and Bioscience Aalborg University

While lunar bases have been a focus of development in recent years, the complex and extreme environment of the lunar surface remains a considerable challenge for lunar exploration. Unlike those on Earth,lunar day and night temperature variations cause the properties of materials, especially metallic materials, to evolve in completely different manners. In this study, we investigated the property evolution of nine typical highperformance metallic materials using laboratory simulations of the extremely long-period lunar temperature environment. While lunation treatment improves the properties of all metallic materials, the microscopic mechanisms vary for amorphous and crystalline alloys with different structures. The treatment reduces both the loosely packed regions and heterogeneity in amorphous alloys while causing significant phase changes in crystalline alloys. Furthermore, a conservative prediction of the service life of metallic materials on lunar bases is provided based on analyzing microplastic events, followed by the practical material selection recommendations in various lunar application scenarios.

关键词： Lunar exploration Metallic glass Metallic material Property evolution

Nonreciprocal generation of Schrodinger cat state induced by topology

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Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 23-30页

作者： zi-hao Li Li-Li Zheng Ying Wu Xin-You Lü School of Physics and Institute for Quantum Science and Engineering Huazhong University of Science and Technologyand Wuhan Institute of Quantum TechnologyWuhan 430074China Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education Jianghan UniversityWuhan 430074China

The Schrodinger cat state produced differently in two directions is anticipated to be a critical quantum resource in quantum information *** exploring the interplay between quantum nonreciprocity and topology in a one-dimensional microcavity array,we obtain the Schrodinger cat state(a pure quantum state)in a chosen direction at the edge cavity,whereas a classical state in the other *** nonreciprocal generation of the cat state originates from the topologically protected chiralitymode excitation in the nontrivial phase,but in the trivial phase,the nonreciprocal generation of cat state ***,our proposal is switchable by tuning the parameters so that a topological phase transition ***,the obtained cat state has nonreciprocal high fidelity,nonclassicality,and quantum coherence,which are sufficient to be used in various one-way quantum technologies,e.g.,invisible quantum sensing,noise-tolerant quantum computing,and chiral quantum *** work provides a general approach to control quantum nonreciprocities with the topological effect,which substantially broadens the fields of nonreciprocal photonics and topological physics.

关键词： Schr?dinger cat state nonreciprocity topology

Realizing high initial Coulombic efficiency in manganese-based layered oxide cathodes for sodium-ion batteries via P2/O'3 biphasic structure optimization

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Rare Metals 2024年第5期43卷 2093-2102页

作者： Bo Peng zi-hao Zhou Ping Xuan Jie Xu Lian-Bo Ma School of Materials Science and Engineering Anhui University ofTechnologyMa'anshan 243002China Anhui Product Quality Supervision&Inspection Research Institute Hefei 230051China

Mn-based layered oxides are among the most promising cathode materials for sodium-ion batteries owing to the advantages of abundance,environmenta friendliness,low cost and high specific capacity.P2 and O'3 are two representative structures of Mn-based layered ***,the P2 structure containing insufficien Na generally exhibits low initial charge capacity,while O'3structure with sufficient Na delivers high initial charge capacity but poor cycle *** study prepared a multitude of Na_(x)MnO_(2)(x=0.7,0.8,0.9)cathode materials with varying P2/O'3 ratios and further investigated their electrochemical *** optimized Na_(0.8)MnO_(2) comprising 69.9 wt%O'3 and 30.1 wt%P2 phase,exhibited relatively balanced specific capacity,Coulombic efficiency and cycle ***,it achieved a high specific capacity of 128.9 mAh·g^(-1) with an initia Coulombic efficiency of 98.2%in half-cell configuration The Na_(0.8)MnO_(2)//hard carbon full cell also achieved a high specific capacity of 126.7 mAh·g^(-1) with an initia Coulombic efficiency of 98.9%.Moreover,the capacity fading mechanism was revealed by combining in-situ and ex-situ X-ray *** findings of this study provide theoretical guidance for further modification design of Mnbased layered cathodes.

关键词： Sodium-ion batteries Cathode materials Mn-based layered oxides P2/0'3 composites

IR-YOLO: Real-Time Infrared Vehicle and Pedestrian Detection

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Computers, Materials & Continua 2024年第2期78卷 2667-2687页

作者： Xiao Luo hao zhu Zhenli Zhang Department of Electrical Engineering and Automation Jiangxi University of Science and TechnologyGanzhou341000China Jiangxi Provincial Key Laboratory of Maglev Technology Ganzhou341000China Graduate School of Information Production and SystemsWaseda UniversityKitakyushu-shiFukuoka808-0135Japan

Road traffic safety can decrease when drivers drive in a low-visibility *** application of visual perception technology to detect vehicles and pedestrians in infrared images proves to be an effective means of reducing the risk of *** tackle the challenges posed by the low recognition accuracy and the substan-tial computational burden associated with current infrared pedestrian-vehicle detection methods,an infrared pedestrian-vehicle detection method A proposal is presented,based on an enhanced version of You Only Look Once version 5(YOLOv5).First,A head specifically designed for detecting small targets has been integrated into the model to make full use of shallow feature information to enhance the accuracy in detecting small ***,the Focal Generalized Intersection over Union(GIoU)is employed as an alternative to the original loss function to address issues related to target overlap and category ***,the distribution shift convolution optimization feature extraction operator is used to alleviate the computational burden of the model without significantly compromising detection *** test results of the improved algorithm show that its average accuracy(mAP)reaches 90.1%.Specifically,the Giga Floating Point Operations Per second(GFLOPs)of the improved algorithm is only *** contrast,the improved algorithms outperformed the other algorithms on similar GFLOPs,such as YOLOv6n(11.9),YOLOv8n(8.7),YOLOv7t(13.2)and YOLOv5s(16.0).The mAPs that are 4.4%,3%,3.5%,and 1.7%greater than those of these algorithms show that the improved algorithm achieves higher accuracy in target detection tasks under similar computational resource *** the other hand,compared with other algorithms such as YOLOv8l(91.1%),YOLOv6l(89.5%),YOLOv7(90.8%),and YOLOv3(90.1%),the improved algorithm needs only 5.5%,2.3%,8.6%,and 2.3%,respectively,of the *** improved algorithm has shown significant advancements in balancing accuracy and computati

关键词： Traffic safety infrared image pedestrians and vehicles focal GIoU distributed shift convolution