检索结果-内蒙古大学图书馆

Observation of dark edge states in parity-time-symmetric quantum dynamics

National science Review 2023年第8期10卷 156-165页

作者： Peng Xue Xingze Qiu Kunkun Wang Barry C. Sanders Wei Yi Beijing Computational Science Research Center Key Laboratory of Quantum Information University of Science and Technology of China Chinese Academy of Sciences Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Chinese Academy of Sciences School of Physics and Optoelectronic Engineering Anhui University Shanghai Branch National Laboratory for Physical Sciences at MicroscaleUniversity of Science and Technology of China Institute for Quantum Science and Technology University of Calgary Program in Quantum Information Science Canadian Institute for Advanced Research

Topological edge states arise in non-Hermitian parity-time(PT)-symmetric systems, and manifest themselves as bright or dark edge states, depending on the imaginary components of their eigenenergies. As the spatial probabilities of dark edge states are suppressed during the non-unitary dynamics, it is a challenge to observe them experimentally. Here we report the experimental detection of dark edge states in photonic quantum walks with spontaneously broken PT symmetry, thus providing a complete description of the topological phenomena therein. We experimentally confirm that the global Berry phase in PT-symmetric quantum-walk dynamics unambiguously defines topological invariants of the system in both the PT-symmetry-unbroken and-broken regimes. Our results establish a unified framework for characterizing topology in PT-symmetric quantum-walk dynamics, and provide a useful method to observe topological phenomena in PT-symmetric non-Hermitian systems in general.

关键词： parity-time symmetry photonic quantum walks dark edge states topological invariants

来源：评论

学校读者我要写书评

暂无评论

Machine Learning-Based Prediction of Corrosion Inhibition Efficiency of Expired Pharmaceuticals: Model Development and Application

引用

Journal of Bio- and Tribo-Corrosion 2025年第1期11卷 1-12页

作者： Putra, Dzaki Asari Surya Ardyansyah, Nibras Bahy Putranto, Nicholaus Verdhy Trisnapradika, Gustina Alfa Akrom, Muhamad Rustad, Supriadi Dipojono, Hermawan Kresno Maezono, Ryo Faculty of Computer Science Study Program in Informatics Engineering Universitas Dian Nuswantoro Semarang50131 Indonesia Research Center for Materials Informatics Faculty of Computer Science Universitas Dian Nuswantoro Semarang50131 Indonesia Quantum and Nano Technologies Research Group Faculty of Industrial Technology Institut Teknologi Bandung Bandung40132 Indonesia School of Information Science Japan Advanced Institute of Science and Technology Ishikawa923-1292 Japan

Corrosion poses a significant challenge in industries due to material degradation and high maintenance costs, making effective inhibitors essential. Recent studies suggest expired pharmaceuticals as alternative corrosion inhibitors, but identifying the most efficient compounds can be time-consuming. This study applies machine learning models, particularly Gradient Boosting Regressor (GBR), to predict corrosion inhibition efficiency (CIE). The developed model is integrated into a web-based application, enabling real-time, accurate CIE predictions. Results show GBR as the more precise model for predicting CIE, with low error rates. The streamlit-based web application offers a user-friendly platform, facilitating quick identification of suitable inhibitors. It is flexible, supporting analysis beyond corrosion inhibitors, and significantly enhances the efficiency of the evaluation process. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.

关键词： Adversarial machine learning

来源：评论

学校读者我要写书评

暂无评论

Organic X-Ray Image Sensors Using a Medium Bandgap Polymer Donor with Low Dark Current

引用

Energy & Environmental Materials 2024年第6期7卷 230-237页

作者： Jong-Woon Ha Seung Hun Eom Bo Kyung Cha Seyeong Song Hyeong Ju Eun Jong H.Kim Jong Mok Park BongSoo Kim Byoungwook Park Seo-Jin Ko Sung Cheol Yoon Changjin Lee In Hwan Jung Do-Hoon Hwang Department of Chemistry Chemistry Institute for Functional MaterialsPusan National UniversityBusan 46241Korea Division of Advanced Energy Materials Research Center Korea Research Institute of Chemical Technology(KRICT)Daejeon 34114Korea Electro-Medical Device Research Center Korea Electrotechnology Research Institute(KERI)Ansan 15588Korea Graduate School of Carbon Neutrality School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Molecular Science and Technology Ajou UniversitySuwon 16449Korea Research Center for Advanced Specialty Chemicals Korea Research Institute of Chemical TechnologyUlsan 44412Korea Department of Chemistry Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Organic and Nano Engineering Human-Tech Convergence ProgramHanyang University222 Wangsimni-roSeongdong-guSeoul 04763Korea

The development of portable X-ray detectors is necessary for diagnosing fractures in unconscious patients in emergency ***,this is quite challenging because of the heavy weight of the scintillator and silicon *** weight and thickness of X-ray detectors can be reduced by replacing the silicon layer with an organic *** study presents a novel bithienopyrroledione-based polymer donor that exhibits excellent photodetection properties even in a thick photoactive layer(~700 nm),owing to the symmetric backbone and highly soluble molecular structure of *** ability of bithienopyrroledione-based polymer donor to strongly suppress the dark current density(Jd~10−10 A cm^(−2))at a negative bias(−2.0 V)while maintaining high responsivity(R=0.29 A W−1)even at a thickness of 700 nm results in a maximum shot-noise-limited specific detectivity of D_(sh)^(*)=2.18×10^(13)Jones in the organic *** organic photodetectors are developed by slot-die coating for use in X-ray detectors,which exhibit D_(sh)^(*)=2.73×10^(12)Jones with clear rising(0.26 s)and falling(0.29 s)response times upon X-ray *** reliability is also proven by linear response of the X-ray detector,and the X-ray detection limit is 3 mA.

关键词： low dark current low detection limit organic photodetector printable X-ray

来源：评论

学校读者我要写书评

暂无评论

Polarization-contrcoled chiral trransport

引用

Light(science & Applications) 2025年第3期14卷 822-830页

作者： Hang Zhu Jian Wang Andrea Alu Lin Chen Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Photonics Initiative Advanced Science Research CenterCity University of New YorkNew YorkNY 10031USA physics Program Graduate CenterCity University of New YorkNew YorkNY 10016USA Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518063China Key Laboratory of High Temperature Electromagnetic Materials and Structure of MOE Wuhan University of Science andTechnologyWuhan430081China

Handedness-selective chiral transport is an intriguing phenomenon that not only holds signifcant importance for fundamental research but also carries application prospects in fields such as optical communications and ***,on-chip chiral transport devices are static,unable to modulate the output modes based on the input *** limits both device functionality reconfiguration and information transmission ***,we propose to use the incident polarization diversity to control the Hamiltonian evolution path,achieving polarization-dependent chiral *** mapping the evolution path of TE and TM polarizations onto elaborately engineered double-coupled waveguides,we experimentally demonstrate that different polarizations yield controllable modal *** work combines Multiple-lnput,Multiple-Output,and polarization diversity concepts with chiral transport and challenges the prevailing notion that the modal outputs are fixed to specific modes in chiral transport,thereby opening pathways for the development of on-chip reconfigurable and high-capacity handedness-selective devices.

关键词： polarization controlled handedness selective control hamilton modulate output modes incident polarization diversity optical communications chiral transport fundamental research

来源：评论

学校读者我要写书评

暂无评论

Reactive surface intermediates over Ni-grafted TiO2 nanotube arrays towards hydrogen evolution reaction in alkaline and chloride media

引用

International Journal of Hydrogen Energy 2023年第81期48卷 31479-31490页

作者： Cheshideh, Hamed Chen, Hsueh-Yu Liao, Kuo-Wei Wang, Kai-Chin Chen, Guan-Cheng Huang, Hsin-Chih Wang, Chen-Hao Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei106335 Taiwan Global Development Engineering Program National Taiwan University of Science and Technology Taipei106335 Taiwan Advanced Manufacturing Research Center National Taiwan University of Science and Technology Taipei106335 Taiwan

In this study, the Ni nanoparticles grafted TiO2 nanotubes electrode improved by surface reconstruction (s-Ni/TiO2/Ti) shows the facile hydrogen evolution reaction (HER) in the alkaline and chloride solutions. Nickel nanoparticles were electrochemically grafted on the anodic TiO2 nanotubes under different conditions. The heat treatment of TiO2 nanotubes contributes to the enhancement of electrical conductivity and template adherence. The surface reconstruction is indicated to create heterojunction intermediates, Ni(OH)2 and NiOOH, on the surface of Ni nanoparticles. An extremely low overpotential of 126 mV is required for HER on the s-Ni/TiO2/Ti electrode in 1.0 M KOH solution, showing higher activity than Pt/C. Besides, the developed electrode exhibits an overpotential of 127 mV for HER in 1.0 M KOH + 0.5 M NaCl solution. The long-term stability over 100 h suggests a highly active and inexpensive material choice for substituting the precious electrocatalysts in corrosive media such as seawater. © 2023 Hydrogen Energy Publications LLC

关键词： Titanium dioxide

来源：评论

学校读者我要写书评

暂无评论

A Proposal of the Improved Method for Measuring Insulation Resistance between a Photovoltaic Module String and the Earth using the Self-biased Method

引用

IEEJ Transactions on Power and Energy 2025年第1期145卷 13-20页

作者： Kazama, Takuro Kato, Kazuhiko Doctoral Program in Risk and Resilience Engineering University of Tsukuba 1-1-1 Tennodai Tsukuba305-8573 Japan Renewable Energy Research Center National Institute of Advanced Industrial Science and Technology 2-2-9 Machiikedai Koriyama963-0298 Japan

For safe operation of a photovoltaic generating system, an insulation monitoring function, which can immediately detect deterioration of insulation between photovoltaic module strings and the earth, is indispensable. This function requires accurate measurement, low leakage current and suppression of rising voltage against the earth. In this paper, a new insulation monitoring method of photovoltaic module strings is proposed by the improved existing self-biased method that has an inevitable voltage rise under measurement. In this new method, both terminals of photovoltaic module strings are always connected to the ground with appropriate resistors. Theoretical discussion and experiments for this new method showed precise measurement, and acceptable leakage current under various outdoor conditions. In addition, it was confirmed that this method could sufficiently decrease in the voltage rise compared with the existing self-biased method. © 2025 The Institute of Electrical Engineers of Japan.

关键词： Photovoltaics

来源：评论

学校读者我要写书评

暂无评论

Elevated temperature-driven coordinative reconstruction of an unsaturated single-Ni-atom structure with low valency on a polymer-derived matrix for the electrolytic oxygen evolution reaction

引用

Nanoscale 2024年第15期16卷 7467-7479页

作者： Patil, Rahul Rajput, Anubha Matsagar, Babasaheb M. Chen, Norman C. R. Ujihara, Masaki Salunkhe, Rahul R. Yadav, Praveen Wu, Kevin C.-W. Chakraborty, Biswarup Dutta, Saikat Electrochemical Energy & Sensor Research Laboratory Amity Institute of Click Chemistry Research & Studies Amity University Noida India Department of Chemistry Indian Institute of Technology New Delhi India Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Taiwan National Taiwan University Taiwan Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei Taiwan Materials Research Laboratory Department of Physics Indian Institute of Technology Jammu India Synchrotron X-ray Facility Raja Ramanna Centre for Advanced Technology Rajendra Nagar Madhya Pradesh 452013 Indore India

A high-temperature pyrolysis-controlled coordination reconstruction resulted in a single-Ni-atom structure with a Ni-Nx-C structural unit (x = N atom coordinated to Ni). Pyrolysis of Ni-phen@ZIF-8-RF at 700 °C resulted in NiNP-NC-700 with predominantly Ni nanoparticles. Upon elevating the pyrolysis temperature from 700 to 900 °C, a coordination reconstruction offers Ni-Nx atomic sites in NiSA-NC-900. A combined investigation with X-ray absorption spectroscopy, X-ray photoelectron spectroscopy, and soft X-ray L3-edge spectroscopy suggests the stabilization of low-valent Niδ+ (0 −2 was achieved. The cell potential recorded with Pt(−)/(+)NiSA-NC-900/NF was much lower than that obtained for other cells, i.e., Pt(−)/NF and NF(−)/(+)NF, which enhances the potentials of low-valent NiSAs for insightful understanding of the OER. At a constant applied potential of 1.61 V (vs. RHE) for 12 h, an small increase in current for initial 0.6 h followed by a constant current depicts the fair stability of catalyst for 12 h. Our results offer an insightful angle into the OER with a coordinatively reconstructed single-Ni-atom structure at lower valency ( © 2024 The Royal Society of Chemistry.

关键词： Reaction kinetics

来源：评论

学校读者我要写书评

暂无评论

Biosurfactant-Enhanced Remediation of Oil-Contaminated Groundwater

Biosurfactant-Enhanced Remediation of Oil-Contaminated Groun...

引用

2024 SPE Europe Energy Conference and Exhibition, EURO 2024

作者： Sanchez-Huerta, C. Hong, P.-Y. Zhang, S. Alahmari, M.M. Humam, A.A. Environmental Science and Engineering Program Biological and Environmental Science and Engineering Division King Abdullah University of Science and Technology Thuwal Saudi Arabia Saudi Aramco’s EXPEC Advanced Research Center Dhahran Saudi Arabia

ISBN: (纸本)9781959025399

Groundwater contaminated with hydrocarbons poses a serious hazard to the environment. Current oil-contaminated groundwater remediation techniques include physical, chemical, and biological approaches. Chemical surfactants have the potential of high toxicity due to their low biodegradability. Biosurfactants have demonstrated similar performance to that of chemical surfactants, with the added value of low toxicity. The use of surfactants directly over the top layer of crude oil-contaminating groundwater, where environmental conditions are different from that in above ground surfaces, have yet not been explored in depth. Therefore, this study aims to investigate the potential of four different surfactants for their ability to be deployed in conditions mimicking underground aquifer so as to enhance remediation of oil-contaminated groundwater. Selected surfactants comprised two chemical surfactants, referred to as A and B, and two biosurfactants, referred to as BS and C. Surfactants were evaluated for their ability (i) to reduce the crude oil layer thickness through facilitating oil dispersion, and (ii) the extent of natural biodegradation it can achieve. Experiments were performed in glass flasks containing synthetic groundwater and crude oil supplemented with surfactant added at the three different surfactants: oil ratios (S:O) 1:5, 1:10 and 1:50. Reduction of crude oil layer thickness, water turbidity, and bacterial cell count were continuously monitored for 60 days to observe the temporal variation of biosurfactant activity towards crude oil. The performance of surfactants A, C and BS in reducing oil layer thickness was influenced by temperature and S:O ratios. Overall, increase in temperature increased the performance of these three surfactants. S:O ratio was optimal at 1:10 for surfactants A and BS, and at 1:5 for surfactant C. Surfactants A and C reduced the oil layer thickness mainly by means of dispersion and less by biodegradation. In contrast, surfactant BS ex

关键词： Surface active agents

来源：评论

学校读者我要写书评

暂无评论

Hybrid Solution to Remediate Groundwater Contaminated by Petroleum-Hydrocarbons

Hybrid Solution to Remediate Groundwater Contaminated by Pet...

引用

2024 SPE Water Lifecycle Management Conference and Exhibition, WLMC 2024

作者： Alahmari, M.M. Humam, A.A. Zefzafy, I.M. Sanchez-Huerta, C. Hong, P.-Y. Zhang, S. Saudi Aramco's EXPEC Advanced Research Center Dhahran Saudi Arabia Environmental Science and Engineering Program Biological and Environmental Science and Engineering Division King Abdullah University of Science and Technology Thuwal Saudi Arabia

ISBN: (纸本)9781959025320

Groundwater contamination by petroleum-hydrocarbons is a serious environmental problem. Crude oil is a complex mixture of hydrocarbons with serious environmental and health risks. Thus, remediation of groundwater from petroleum hydrocarbon contamination is an emerging priority. Current approaches to remediate hydrocarbon contamination include physical and chemical methods. However, most of these approaches have a limited application for in-situ groundwater remediation. This study aims to develop a sustainable hybrid solution for efficient restoration of groundwater polluted by crude oil, providing a source of high-quality groundwater stream. Hybrid solution compromises in-situ addition of biosurfactant followed by a flow through electrochemical reactor installed in the groundwater well. The proposed hybrid solution comprises a two-stage process evaluated through lab-scale experiments treating crude oil that was mixed with synthetic water, mimicking groundwater contamination by petroleum-hydrocarbons. For biosurfactant optimization, glass flasks containing synthetic groundwater and crude oil were supplemented with biosurfactant BS, and C added at the three surfactants: oil (S:O) ratios 1:5, 1:10, and 1:50. Two temperature (25-35 °C) conditions were analyzed to simulate groundwater environment. The change in the crude oil layer thickness total petroleum hydrocarbon concentration (TPH) was continuously monitored for 60 days. Electron Oxidation was carried out where Boron-dopped diamond (BDD) anode and titanium cathode plates, were fitted into a 1 L reactor containing groundwater, crude oil and biosurfactant. Kinetic analysis at three constant currents (20, 30 and 40 mA/cm2) was performed. Samples were collected at regular intervals along 120 min to determine changes in TPH, COD and pH. The performance of biosurfactant BS and C in reducing the thickness of crude oil layer was influenced by different parameters including temperature, and S:O ratio. The increase in temper

关键词： Groundwater

来源：评论

学校读者我要写书评

暂无评论

A novel methodology based on static visual stimuli and kinesthetic motor imagery for upper limb neurorehabilitation

引用

research on Biomedical Engineering 2024年第3-4期40卷 687-700页

作者： Bastos-Filho, T.F. Villa-Parra, A.C. Guerrero-Méndez, C.D. González-Cely, A.X. Blanco-Díaz, C.F. Delisle-Rodríguez, D. Igasaki, T. Vitoria Brazil Biomedical Engineering Research Group Salesian Polytechnic University Cuenca Ecuador Postgraduate Program in Neuroengineering Edmond and Lily Safra International Institute of Neurosciences Santos Dumont Institute Macaiba Brazil Faculty of Advanced Science and Technology Kumamoto University Kumamoto Japan

Purpose: This work proposes a protocol to be used in a Brain-Computer Interface (BCI) for hand and finger movement rehabilitation aimed at post-stroke patients. This strategy is based on Electroencephalography (EEG) and uses concepts of both Static Visual Stimuli (SVS) of the own subject’s hand (OwnSVS) and Kinesthetic Motor Imagery (KMI) to improve the motor task recognition of the same limb. Methods: The protocol proposed here takes into account several aspects, such as physical rehabilitation strategies, Active Hand Orthosis (AHO) — represented by a robotic glove —, and the acquisition of the EEG signal over the brain motor area. Power Spectral Density (PSD) and Riemannian Geometry (RG) are used for feature extraction in this work, considering Mu (μ, 8–12 Hz), Low-Beta (Low-β, 13–17 Hz) and High-Beta (High-β, 18–24 Hz) frequency bands. Moreover, a feature selection stage using Pair-Wise Feature Proximity (PWFP) is also used before input to a Machine Learning (ML) classifier. Here, Linear Discriminant Analysis (LDA), Support Vector Machine (SVM), k-Nearest Neighbors (kNN), and Decision Tree (DT) are compared. Results: As results, evaluated in 10 healthy subjects, features using PSD-PWFP and kNN achieved a maximum ACC of 89.81% (with AHO movements), improving by 3% the standard protocol (without AHO movements). Conclusions: The findings of this work indicate that AHO movement assistance can improve the recognition of hand opening and closing MI tasks, which can be implemented in the design of robotic BCI controllers for hand and finger movement neurorehabilitation in stroke patients. © The Author(s), under exclusive licence to The Brazilian Society of Biomedical Engineering 2024.

关键词： Electroencephalography

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：