检索结果-内蒙古大学图书馆

Dual-compressed photoacoustic single-pixel imaging

National science Review 2023年第1期10卷 187-195页

作者： Yuning Guo Baowen Li Xiaobo Yin Department of Mechanical Engineering University of Colorado Department of Material Science and Engineering Department of Physics Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Materials Science and Engineering Program University of Colorado

Photoacoustic imaging,an acoustic imaging modality with potentially optical resolution in an optical turbid medium,has attracted great ***,the convergence of wavefront optimization and raster scanning in computational photoacoustic imaging leads to the challenge of fast mapping,especially for a spatial resolution approaching the acoustic deep-subwavelength *** a sparse sampling paradigm,compressive sensing has been applied in numerous fields to accelerate data acquisition without significant quality *** this work,we propose a dual-compressed approach for photoacoustic surface tomography that enables high-efficiency imaging with 3D spatial resolution unlimited by the acoustics in a turbid *** dual-compressed photoacoustic imaging with single-pixel detection,enabled by spatially optical modulation with synchronized temporally photoacoustic coding,allows decoding of the fine optical information from the modulated acoustic signal even when the variance of original photoacoustic signals is *** perform a proof-of-principle numerical demonstration of dual-compressed photoacoustic imaging, that resolves acoustic sub-acoustic-wavelength details with a significantly reduced number of measurements,revealing the potential for dynamic *** dual-compressed concept,which transforms unobtrusive spatial difference into spatio-temporal detectable information,can be generalized to other imaging modalities to re alize efficient,high-spatial-resolution imaging.

关键词： photoacoustic imaging compressive sensing single-pixel imaging surface tomography

来源：评论

学校读者我要写书评

暂无评论

Texture development and surface reconstruction of BiVO_(4)photoanode via one-pot hydrothermal reaction for enhanced photoelectrochemical water splitting

引用

Journal of Advanced Ceramics 2025年第3期14卷 133-141页

作者： Sung Won Hwang Yoo Jae Jeong Runfa Tan Indhujasri Saravanan Hyun Soo Han Dong Hoe Kim In Sun Cho Department of Energy Systems Research Ajou UniversitySuwon 16499Republic of Korea Department of Material Science&Engineering Ajou UniversitySuwon 16499Republic of Korea Department of Mechanical Engineering Stanford UniversityStanford 94305USA Department of Material Science&Engineering Korea UniversitySeoul 02841Republic of Korea Materials Science and Engineering Program University of Colorado BoulderBoulder 80303USA

The simultaneous optimization of the bulk and surface characteristics of photoelectrodes is essential to maximize their photoelectrochemical(PEC)*** report a novel one-pot hydrothermal synthesis of textured and surface-reconstructed BiVO_(4)photoanodes(ts-BVO),achieving significant improvements in PEC water *** controlling precursor molarity and ethylene glycol(EG)addition,we developed a stepwise dual reaction(SDR)mechanism,which enables simultaneous bulk texture development and surface *** optimized CoBi/ts-BVO photoanode exhibited a photocurrent density of 4.3 mA∙cm^(−2)at 1.23 V *** hydrogen electrode(RHE)with a high Faradaic efficiency of 98%under one sun *** with nontextured BiVO_(4),the charge transport efficiency increased from 8%to 70%,whereas the surface charge transfer efficiency improved from 9%to 85%.These results underscore the critical role of both bulk and surface engineering in enhancing PEC *** findings offer a streamlined approach for improving the intrinsic properties of photoanodes in solar water splitting.

关键词： BiVO_(4) hydrothermal texture surface reconstruction ethylene glycol(EG) photoelectrochemical water splitting

来源：评论

学校读者我要写书评

暂无评论

Characterization of Shale Mechanical Properties via Nanoindentation Scratch Test

Characterization of Shale Mechanical Properties via Nanoinde...

引用

Geotechnical Frontiers 2025: Soil Characterization and Improvement

作者： Rahmani, Fereshteh Espinoza, Wilson F. Material Science Engineering and Commercialization Program Texas State Univ. San MarcosTX United States Material Science Engineering and Commercialization Program Dept. of Engineering Technology Texas State Univ. San MarcosTX United States

ISBN: (数字)9780784486016

Shale, a complex sedimentary rock, exhibits heterogeneous mechanical behavior influenced by its mineral composition and microstructure. Nanoindentation scratch tests offer a promising method to probe the local mechanical properties and understand shale’s response to applied stress at the nanoscale. In this study, shale samples were prepared and subjected to nanoindentation scratch tests, with a systematic approach adopted to analyze critical load, scratch depth, and coefficient of friction (COF) in both parallel and perpendicular orientations to their bedding planes. The results highlight the impact of shale’s anisotropic nature on its mechanical properties. The parallel direction showed 50.18% and 13.37% greater critical loads than the perpendicular direction under scratching forces of 150 and 300 µN. Similarly, a scratch depth analysis reveals a 60.90% reduction of scratch penetration in the parallel direction, attributed to cohesive forces and grain alignment. The coefficient of friction, which fluctuates with lateral displacement, reflects the heterogeneity of shale’s mineral composition and the varying interaction between the indenter and different shale minerals. The obtained average adhesion work in the parallel orientation showed 34.95% more surface energy compared to the perpendicular orientation in the tested shales. These findings demonstrate that microstructural features directly influence fracture propagation and mechanical behavior. The insights gained from this study can be utilized to optimize hydraulic fracturing and drilling operations, and to ensure improved resource extraction efficiency and structural stability. This research evaluates factors that affect the nanostructure and the mechanical properties of shale obtained through indentation techniques. © ASCE.

关键词： Nanoindentation

来源：评论

学校读者我要写书评

暂无评论

Interfacial reactions in the Sn-9.0 wt.% Zn/Cu-Ti alloy (C1990 HP) couple

引用

Soldering and Surface Mount Technology 2024年第1期36卷 30-38页

作者： Laksono, Andromeda Dwi Chen, Chih-Ming Yen, Yee-Wen Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan Department of Chemical Engineering National Chung Hsing University Taichung Taiwan Study Program of Material and Metallurgical Engineering Institut Teknologi Kalimantan Balikpapan Indonesia

Purpose: The purpose of this study was to examine the influence of adding a small amount of Ti to a Cu-based alloy, specifically the commercial Hyper Titanium Copper alloy (C1990 HP), which contains Cu-3.28 wt.% Ti, on its interfacial reaction with Sn-9.0 wt.% Zn (SnZn) solder, using the liquid/solid reaction couple technique. Design/methodology/approach: The SnZn/C1990 HP couples were subjected to a reaction temperature of 240–270°C for a duration of 0.5–5 h. The resulting reaction couple was characterized using a scanning electron microscope, energy dispersive spectrometer, electron probe microanalyzer and X-ray diffractometer. Findings: It was observed that the scallop-shaped CuZn5 and planar Cu5Zn8 phases were formed in almost all SnZn/C1990 HP couples. With increased reaction duration and temperature, the Cu-rich intermetallic compound (IMC)-Cu5Zn8 phase became a dominant IMC formed at the interface. The total thickness of the IMCs was increased with the increase in the reaction duration and temperature. The IMC growth obeyed the parabolic law, and the IMC growth mechanism was diffusion controlled. The activation energy of the SnZn/C1990 HP couple was 64.71 kJ/mol. Originality/value: This article presents an analysis of the IMC thickness in each sample using ImageJ software, followed by kinetic analysis using Origin software at various reaction temperatures of SnZn/C1990 HP in liquid/solid couples. The study also includes detailed reports on the morphology, interface composition and X-ray diffraction analysis, as well as the activation energy. The findings can serve as a valuable reference for electronic packaging companies that utilize C1990 HP substrates. © 2023, Emerald Publishing Limited.

关键词： Binary alloys

来源：评论

学校读者我要写书评

暂无评论

Observation of the spatial Goos–Hänchen shift due to low-loss dielectrics

引用

Optics Letters 2025年第11期50卷 3533-3536页

作者： Operaña, Jared Joshua Simon, Niña Zambale Hermosa, Nathaniel Material Science and Engineering Program University of the Philippines-Diliman Diliman Quezon City1101 Philippines National Institute of Physics University of the Philippines-Diliman Diliman Quezon City1101 Philippines

In this paper, we present the first, to the best of our knowledge, measurement of spatial Goos–Hänchen (GH) shifts for low-loss dielectrics (φ0 = Εi/|Εr| 1). The observed resonant shifts are up to 100λ. Because of this sharp resonance, measuring the shift is challenging. We argue that it might be possible to use these simple materials for the many proposed applications of the GH shift. Moreover, we show that by using the GH shifts, we can discriminate materials with almost similar values of the real permittivity (Εr) but of different imaginary values (Εi), in our case, the bulk gallium arsenide (GaAs) versus silicon (Si). This allows us to put forth a method to measure the complex permittivity of low-loss dielectrics through the GH shifts. Using this method, the measured permittivity values for Si and GaAs differ from standard values by as little as 0.2% for the real Ε component and 7% for the imaginary Ε component. Further precise and accurate measurement of GH shift will result in an alternative method to measure the permittivity of materials with almost similar real permittivities. © 2025 Optica Publishing Group. All rights are reserved.

关键词： Permittivity measurement

来源：评论

学校读者我要写书评

暂无评论

Sulfonation of HwBKP by Sulfur Trioxide Pyridine Complex and Preparation of Anionic Cellulose Beads Using the Same

引用

Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2023年第2期55卷 10-18页

作者： Kim, Younglae Heo, Dohyeon Cho, Byoung-Uk Department of Paper Science & Engineering College of Forest & Environmental Sciences Kangwon National University Korea Republic of Program of Paper Material Science & Engineering College of Forest & Environmental Sciences Kangwon National University Korea Republic of

To expand the applications of cellulose beads, sulfonated cellulose beads were prepared by chemically modifying HwBKP fibers with sulfur trioxide pyridine complex (STP), dissolving in tetraethylammonium hydroxide (TEAOH)/urea solvent, and dropping into acetic acid solution. The effect of the amount of STP added on the properties of sulfonated cellulose solution and cellulose beads was investigated. It was observed that the sulfonated cellulose beads exhibited anionic surface charge in a fairly wide pH range, and the degree of substitution of sulfonic acid groups and the zeta potential of the cellulose beads could be controlled by adjusting the amount of added STP. In addition, as the amount of STP added increased, the crystallinity of the cellulose decreased, the viscosity and surface tension of the sulfonated cellulose/TEAOH/urea solution decreased, and the size of the cellulose beads increased. © 2023 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Zeta potential

来源：评论

学校读者我要写书评

暂无评论

Compact solar-powered plasma water generator: enhanced germination of aged seed with the corona dielectric barrierdischarger

引用

Frontiers of Agricultural science and engineering 2024年第4期11卷 642-651页

作者： Yiting XIAO Yang TIAN Haizheng XIONG Ainong SHI Jun ZHU Biological Engineering University of ArkansasFayettevilleAR 72701USA Program of Material Science and Engineering University of ArkansasFayettevilleAR 72701USA Department of Horticulture University of ArkansasFayettevilleAR 72701USA.

Seed aging adversely affects agricultural productivity by reducing germination rates and seedling vigor,leading to significant costs for seed banks and companies due to the need for frequent seed *** study demonstrated the use of plasma-activated water(PAW),generated by a solar-powered corona dielectric barrier discharger,to enhance germination rates of spinach seeds that had been stored at 4℃ for 23 *** seeds with PAW at 17 kV for 15 min improved germination(by 135%)and seedling growth compared to untreated *** detailed analysis,beneficial PAW properties for seed development were identified,and a molecular mechanism for this rejuvenation is *** solar-powered microreactor used in this study is considered to represent a significant advancement in seed treatment technology,offering a sustainable solution to meet growing food demands while addressing environmental and resource sustainability challenges.

关键词： Non-thermal plasma plant growth reactor design seedgermination

来源：评论

学校读者我要写书评

暂无评论

High resolution and high sensitivity imaging magnetometer with magnetic nanoparticle and optical heterodyne detection

High resolution and high sensitivity imaging magnetometer wi...

引用

2024 Frontiers in Optics, FiO 2024

作者： Bartos, Jan Tis, Taleb Ba Park, Wounjhang Huang, Shu-Wei Department of Electrical Computer and Energy Engineering University of Colorado Boulder80309 United States Material Science and Engineering Program University of Colorado Boulder80309 United States

We present progress towards an imaging magnetometer using a magneto-optical polymer nanocomposite thin film, experimentally demonstrating 29nT/√Hz sensitivity with © Optica Publishing Group 2024, © 2024 The... 详细信息

关键词： Heterodyne detection

来源：评论

学校读者我要写书评

暂无评论

High resolution and high sensitivity imaging magnetometer with magnetic nanoparticle and optical heterodyne detection

High resolution and high sensitivity imaging magnetometer wi...

引用

2024 Laser science, LS 2024

作者： Bartos, Jan Ba Tis, Taleb Park, Wounjhang Huang, Shu-Wei Department of Electrical Computer and Energy Engineering University of Colorado Boulder80309 United States Material Science and Engineering Program University of Colorado Boulder80309 United States

We present progress towards an imaging magnetometer using a magneto-optical polymer nanocomposite thin film, experimentally demonstrating 29nT/√Hz sensitivity with © 2024 The Author(s). © Optica Publishing ... 详细信息

关键词： Heterodyne detection

来源：评论

学校读者我要写书评

暂无评论

Direct Multi-group Cross-sections via NJOY+OJOYU for PWR and FLiBe-MSR Reactor Systems

Direct Multi-group Cross-sections via NJOY+OJOYU for PWR and...

引用

2023 Transactions of the American Nuclear Society Annual Meeting and Technology Expo, ANS 2023

作者： Wang, Meng-Jen Simpson, Michael Sjoden, Glenn E. Nuclear Engineering Program Department of Civil and Environmental Engineering University of Utah United States Department of Material Science and Engineering University of Utah United States

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：