检索结果-内蒙古大学图书馆

International Conference on Infrared and Millimeter Waves

作者： Debamitra Chakraborty Bradley N. Mills Jing Cheng Scott A. Gerber Roman Sobolewski Materials Science Graduate Program University of Rochester Rochester New York USA Laboratory for Laser Energetics University of Rochester Rochester New York USA Department of Surgery University of Rochester Medical Center Rochester New York USA Department of Electrical and Computer Engineering University of Rochester Rochester New York USA

ISBN: (数字)9781728194271

ISBN: (纸本)9781728194288

We developed a maximum a-posteriori probability-based terahertz parameter extraction method to obtain tissue characteristics of paraffin-embedded murine pancreatic ductal adenocarcinoma samples. This estimation algorithm can produce conservative estimates of tissue parameters without resorting to frequency-domain analysis. We report well-resolved and statistically significant differences in tumor tissue regions as compared to their healthy counterparts using our parameters extraction algorithm. We propose to use the index of refraction and the absorption as imaging biomarker parameters for biological tissue characterization.

关键词： Maximum a posteriori estimation Absorption Frequency-domain analysis Biological tissues Refractive index Estimation Probability

来源：评论

学校读者我要写书评

暂无评论

The capacity of osmotic for the living of aquatic plant at the Area of Tahura KGPAA Mangkunagoro I, the Province of Central Java

引用

AIP Conference Proceedings 2023年第1期2683卷

作者： Masrochatun Sutrisno Anggoro Ferry Hermawan Master Program of Environmental Science School of Post-Graduate Diponegoro University Semarang - Indonesia Department of Aquatic Resources Faculty of Fisheries and Marine Science Diponegoro University Semarang – Indonesia Department of Civil Engineering Faculty of Engineering Diponegoro University Semarang – Indonesia

The existence of aquatic plants has a significant influence on the biota living at wellspring. The osmotic pressure is significant research to understand the adaptation of the environment changing to organism physiology. This research aims to know the Osmotic Work Rate by comparing osmolarity water value to aquatic plant plasma. The research method is the descriptive analysis of laboratory test results. The water sample was taken from the seven locations of the wellspring. Osmotic work rate is taken from comparing the plasma osmolarity value of the aquatic plant to water Osmolarity. Osmotic work rate zero means osmoregulation patterns isosmotic. The osmotic work rate greater than zero implies osmoregulation patterns hyperosmotic regulatory and osmoregulation patterns hypo-osmotic regulatory if the Osmotic work rate is less than zero. The patterns are used from the seven locations of good springs are the same, osmoregulation patterns of Hyperosmotic regulatory to the environment because the plasma osmolarity of water plants is more significant than water osmolarity.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Emulating Complex Synapses Using Interlinked Proton Conductors

arXiv

引用

arXiv 2024年

作者： Zhang, Lifu Li, Ji-An Hu, Yang Jiang, Jie Lai, Rongjie Benna, Marcus K. Shi, Jian Department of Materials Science and Engineering Rensselaer Polytechnic Institute TroyNY12180 United States Neurosciences Graduate Program University of California San Diego La Jolla CA92093 United States Department of Mathematics Purdue University West LafayetteIN47907 United States Department of Neurobiology School of Biological Sciences University of California at San Diego La Jolla CA92093 United States Department of Physics Applied Physics and Astronomy Rensselaer Polytechnic Institute TroyNY12180 United States

In terms of energy efficiency and computational speed, neuromorphic electronics based on non-volatile memory devices is expected to be one of most promising hardware candidates for future artificial intelligence (AI). However, catastrophic forgetting, networks rapidly overwriting previously learned weights when learning new tasks, remains as a pivotal hurdle in either digital or analog AI chips for unleashing the true power of brain-like computing. To address catastrophic forgetting in the context of online memory storage, a complex synapse model (the Benna-Fusi model) has been proposed recently[1], whose synaptic weight and internal variables evolve following a diffusion dynamics. In this work, by designing a proton transistor with a series of charge-diffusion-controlled storage components, we have experimentally realized the Benna-Fusi artificial complex synapse. The memory consolidation from coupled storage components is revealed by both numerical simulations and experimental observations. Different memory timescales for the complex synapse are engineered by the diffusion length of charge carriers, the capacity and number of coupled storage components. The advantage of the demonstrated complex synapse in both memory capacity and memory consolidation is revealed by neural network simulations of face familiarity detection. Our experimental realization of the complex synapse suggests a promising approach to enhance memory capacity and to enable continual learning. Copyright © 2024, The Authors. All rights reserved.

关键词： Computational efficiency

来源：评论

学校读者我要写书评

暂无评论

Outcoupling Hyperbolic Modes from Aligned Carbon Nanotube Films

Outcoupling Hyperbolic Modes from Aligned Carbon Nanotube Fi...

引用

CLEO: QELS_Fundamental science, QELS 2022

作者： Jerome, Bryant Prasad, Ciril S. Doumani, Jacques Dewey, Oliver S. Baydin, Andrey Pasquali, Matteo Kono, Junichiro Gao, Weilu Alabastri, Alessandro Naik, Gururaj V. Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Chemical and Biomolecular Engineering Rice University HoustonTX77005 United States Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Chemistry Rice University HoustonTX77005 United States Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States Department of Electrical and Computer Engineering University of Utah Salt Lake CityUT84112 United States

Aligned carbon nanotube films make an excellent hyperbolic material platform in the infrared. Here, we experimentally demonstrate the presence of high-k modes in aligned carbon nanotube films and outcouple them to fre... 详细信息

ISBN: (纸本)9781557528209

关键词： Carbon films

来源：评论

学校读者我要写书评

暂无评论

Stokesian Dynamics with odd viscosity

arXiv

引用

arXiv 2022年

作者： Yuan, Hang de la Cruz, Monica Olvera Applied Physics Graduate Program Northwestern University EvanstonIL60208 United States Department of Materials Science and Engineering Northwestern University EvanstonIL60208 United States Department of Chemistry Northwestern University EvanstonIL60208 United States Department of Physics and Astronomy Northwestern University EvanstonIL60208 United States

Stokesian Dynamics is a well-established computational method for simulating dynamics of many particles suspended in a conventional passive fluid medium. Active fluids composed of self-propelling particles with broken time reversal symmetry permit the emergence of a so-called odd viscosity. In this work, we extended the conventional Stokesian Dynamics formalism to incorporate the additional hydrodynamic effects due to odd viscosity, which enables simulating collective behaviors of many particles suspended in an active fluid medium with both even viscosity and odd viscosity. © 2022, CC BY.

关键词： Viscosity

来源：评论

学校读者我要写书评

暂无评论

Effect of Temperature and Mischmetal Addition on the Microstructure, Mechanical Andcorrosion Behavior of Crn Hard Coatings Deposited Onto Zk60 Magnesium Alloys Using Hipims

SSRN

引用

SSRN 2023年

作者： Pereira da Silva, Erenilton Oliveira Junior, William Tavares Avila, Pedro Renato Lima Ribeiro, Josy Kelly Alves dos Santos, Marcos Junio Cortez Maciel, Natalia Mendes Rodrigues, Alisson Pinto, Haroldo Cavalcanti MG Janaúba39447-790 Brazil Department of Engineering Physics Polytechnique Montréal P.O. Box 6079 Station Centre-Ville MontréalQCH3C 3A7 Canada Graduate Program in Materials Science UnB Planaltina Faculty University of Brasilia DF Brasilia70904-910 Brazil SP São Carlos13566-590 Brazil

Magnesium alloys have recently gained popularity due to their low density and suitability for various applications requiring both lightweight and robust mechanical qualities. Nevertheless, their widespread utilization could be improved by their inadequate corrosion resistance. This study examines the deposition of ceramic films using chromium nitride (CrN) via High Power Impulse Magnetron Sputtering (HiPIMS) on ZK60 and ZK60 + 1.5 Mischmetal (MM) at 200°C and 300°C. The morphology and thickness of the CrN films was evaluated by Field Emission Gun-Scanning Electron Microscopy (FEG-SEM) and X-ray Diffraction (XRD), roughness by atomic force microscopy (AFM), and mechanical properties (hardness and elastic modulus) were measured by nanoindentation experiments. Furthermore, the electrochemical impedance spectroscopy (EIS) analysis was used to evaluate the corrosion resistance. Fractured cross-section SEM-FEG images of CrN coatings deposited at 200°C and 300°C revealed differences in thickness and morphology for all samples. ZK60 samples exhibited thicker coatings compared to ZK60+1.5MM, which can be attributed to the stability of intermetallic phases. Increasing temperature resulted in the formation of thinner coatings. Also, at 300°C samples presented different thickness. Surface roughness decreases with temperature, reflecting the formation of refined columnar structures. Hardness and elastic modulus increased with temperature, also presenting different behaviors at 300°C. Corrosion resistance also presented improvement at higher temperatures, with ZK60 outperforming ZK60+1.5MM, as EIS analysis confirmed the denser films enhance corrosion protection, while porous coatings exhibit lower resistance, as was observed for ZK60+1.5MM at 300°C. Results also showed the impact of the thermic stability of the samples on the coating formation, indicating that substrate temperature rises during deposition, leading to possible phase changes in the substrate and, consequently, affe

关键词： Corrosion resistance

来源：评论

学校读者我要写书评

暂无评论

Direct insulator to relativistic quantum Hall transition in graphene

引用

Physical Review B 2023年第20期108卷 205304-205304页

作者： Ching-Chen Yeh Pin-Chi Liao Dinesh K. Patel Wei-Chen Lin Siang-Chi Wang Albert F. Rigosi Randolph E. Elmquist Chi-Te Liang Department of Physics National Taiwan University Taipei 106 Taiwan Physical Measurement Laboratory National Institute of Standards and Technology (NIST) Gaithersburg Maryland 20899 USA Physikalisch-Technische Bundesanstalt (PTB) Bundesallee 100 Braunschweig 38116 Germany Taiwan International Graduate Program Academia Sinica Taipei 115 Taiwan Department of Engineering and System Science National Tsing Hua University Hsinchu 300 Taiwan Center for Quantum Science and Engineering National Taiwan University Taipei 106 Taiwan Taiwan Consortium of Emergent Crystalline Materials (TCECM) Taipei 106 Taiwan

We present evidence of the direct insulator-quantum Hall transition in monolayer epitaxial graphene, a genuine two-dimensional (2D) system. We studied the transition from an insulating state to a quantum Hall state at a high Landau level filling factor ν=6>3 and the plateau-plateau transition from ν=6 to ν=2. Using scaling theory, the critical exponent κ was determined to be 0.41±0.02 for the direct insulator-quantum Hall transition. This closely aligns with κ=0.42±0.02 from the ν=6 to ν=2 quantum Hall plateau-plateau transition. These findings suggest that the two transitions may belong to the same universality class. While similar transitions have been explored in conventional two-dimensional charge systems, our study provides valuable insights into a truly 2D system, deepening our understanding of these transitions.

关键词： Electrical properties Fermions Landau levels Graphene Hall bar Resistivity measurements

来源：评论

学校读者我要写书评

暂无评论

Multiple degrees-of-freedom programmable soft-matter-photonics: Configuration, manipulation, and advanced applications

Responsive Materials

引用

Responsive materials 2024年第1期2卷

作者： Yuxian Zhang Zhi-Gang Zheng Quan Li School of Physics East China University of Science and Technology Shanghai China Institute of Advanced Materials and School of Chemistry and Chemical Engineering Southeast University Nanjing China Materials Science Graduate Program Kent State University Kent Ohio USA Zhi-Gang Zheng and Quan Li.

For centuries, humans have never stopped exploring the nature of light and manipulating it, since light carries multiple information through its intrinsic wave-particle dualism, including wavelength, amplitude, phase, polarization, spin/orbital angular momentum, etc., which determines the physical language and basic manners we perceive the objective world. Conventional optical devices, such as lenses, prisms, and lasers, are composed of solid elements that are bulky, making it difficult to manipulate light dynamically with multiple degrees-of-freedom. Comparatively, some responsive soft matters, especially represented by liquid crystals (LCs), possess distinctive orientational order and spontaneous self-assembled superstructures, enabling the digital programming of microstructures and multiple degrees-of-freedom manipulation of their optical characteristics. The optical manipulation based on these soft superstructures, that is, the “soft-matter-photonics”, is playing an impressive role in integrated functional devices, especially in the present age of information explosion. Herein, we review the latest advances, respectively, in the microstructure configurations, multiple degrees-of-freedom manipulations, and the relevant prospective applications. Additionally, scientific issues and technical challenges that hinder the programing operation and optical manipulations are discussed. Toward a four-dimensional optical manipulation of soft condensed matter, this review may have wide implications on a variety of applications, including the integrated fabrication of compact elements, multi-channel information processing and high-capacity optical communications.

关键词： degree-of-freedom liquid crystal optical manipulation planar optics soft matter

来源：评论

学校读者我要写书评

暂无评论

Designing the pressure-dependent shear modulus using tessellated granular metamaterials

arXiv

引用

arXiv 2023年

作者： Zhang, Jerry Wang, Dong Jin, Weiwei Xia, Annie Pashine, Nidhi Kramer-Bottiglio, Rebecca Shattuck, Mark D. O’Hern, Corey S. Department of Mechanical Engineering & Materials Science Yale University New HavenCT06520 United States Benjamin Levich Institute and Physics Department The City College of New York New YorkNY10031 United States Department of Physics Yale University New HavenCT06520 United States Department of Applied Physics Yale University New HavenCT06520 United States Integrated Graduate Program in Physical and Engineering Biology Yale University New HavenCT06520 United States

Jammed packings of granular materials display complex mechanical response. For example, the ensemble-averaged shear modulus 〈G〉 increases as a power-law in pressure p for static packings of soft spherical particles that can rearrange during compression. We seek to design granular materials with shear moduli that can either increase or decrease with pressure without particle rearrangements even in the large-system limit. To do this, we construct tessellated granular metamaterials by joining multiple particle-filled cells together. We focus on cells that contain a small number of bidisperse disks in two dimensions. We first study the mechanical properties of individual disk-filled cells with three types of boundaries: periodic boundary conditions (PBC), fixed-length walls (FXW), and flexible walls (FLW). Hypostatic jammed packings are found for cells with FLW, but not in cells with PBC and FXW, and they are stabilized by quartic modes of the dynamical matrix. The shear modulus of a single cell depends linearly on p. We find that the slope of the shear modulus with pressure, λc c > 0, as well as λc © 2023, CC BY.

关键词： Elastic moduli

来源：评论

学校读者我要写书评

暂无评论

Terahertz Time-Domain Spectroscopy for Probing DC Conductivity of Single-Layer Graphene

Terahertz Time-Domain Spectroscopy for Probing DC Conductivi...

引用

Western New York Image Processing Workshop (WNYIPW)

作者： Debamitra Chakraborty Declan Walden Jing Cheng Julia Wallace Kiryl A. Niherysh Andrei V. Felsharuk Donats Erts Ivan Komissarov Roman Sobolewski Materials Science Graduate Program University of Rochester Rochester New York USA Laboratory for Laser Energetics Rochester New York USA Department of Physics and Astronomy University of Rochester Rochester New York USA Department of Biomedical Engineering University of Rochester Rochester New York USA Institute of Chemical Physics University of Latvia Riga Latvia Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg Sweden Department of Electrical and Computer Engineering University of Rochester Rochester New York USA

We report preliminary results of extracting electrical parameters like DC conductivity, mobility, and carrier concentration of single-layer graphene using Terahertz time-domain spectroscopy (THz-TDS) in transmission geometry. We utilize a simple Drude model and its extension, the Drude-Smith model, capable of accommodating charge carrier scattering by optical and acoustic phonons to describe the complex conductivity in graphene. We observed that a significant area of the sample scanned followed the Drude-Smith behavior, while at a few locations, the simple Drude behavior prevailed. We identified possible reasons that might contribute to this observation, like defects, the presence of polymer residue on the sample, or the sample strain. This research sheds new light on our understanding of graphene's electrical properties and lays the foundation for future investigations addressing defects and contaminants in graphene samples.

关键词：

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：