检索结果-内蒙古大学图书馆

作者： Takada, A. Tanimori, T. Kubo, H. Parker, J.D. Mizumoto, T. Mizumura, Y. Iwaki, S. Sawano, T. Nakamura, K. Taniue, K. Higashi, N. Matsuoka, Y. Komura, S. Sato, Y. Namamura, S. Oda, M. Sonoda, S. Tomono, D. Miuchi, K. Kabuki, S. Kishimoto, Y. Kurosawa, S. Research Institute for Sustainable Humanosphere Kyoto University Uji Kyoto 611-0011 Japan Division of Physics and Astronomy Graduate School of Science Kyoto University Kyoto 606-8502 Japan Unit of Synergetic Studies for Space Kyoto University Kyoto 606-8502 Japan Advanced Biomedical Engineering Research Unit Kyoto University Kyoto Kyoto 606-8502 Japan Department of Physics Graduate School of Science Kobe University Hyogo 657-8501 Kobe Japan Department of Radiation Oncology Tokai University Kanagawa 259-1193 Isehara Japan Radiation Science Center KEK Ibaraki 305-8501 Tsukuba Japan Institute for Materials Research Tohoku University Miyagi 980-8577 Sendai Japan

A micro pixel chamber (μ-PIC), the development of which started in 2000 as a type of a micro pattern gas detector, has a high gas gain greater than 6000 in stable operation, a large detection area of 900 cm2, and a fine position resolution of about 120 μm. However, for its development, simulation verification has not been very useful, because conventional simulations explain only part of the experimental data. On the other hand, some μ-PIC applications require precise understanding of the fluctuation of the gas avalanche and signal waveform for their improvement;therefore, there is a need to update the μ-PIC simulation. Hence, we adopted Garfield++, which is developed for simulating a microscopic avalanche in an effort to explain experimental data. The simulated avalanche size was well consistent with the experimental gas gain. Moreover, we calculated a signal waveform and successfully explained the pulse height and time-over-threshold. These results clearly indicate that the simulation of μ-PIC applications will improve and that Garfield++ simulation will easily facilitate the μ-PIC development.© 2013 IOP Publishing Ltd and Sissa Medialab srl.

关键词： Gases

来源：评论

学校读者我要写书评

暂无评论

Exploring Environmentally Friendly Corrosion Inhibitors: Insights from Natural and Biomass Residue-Derived Compounds

SSRN

引用

SSRN 2024年

作者： Othman, Norinsan Kamil Mohammed, Naba Jasim Yusop, Muhammed Rahimi Al-Gburi, Ahmed Jamal Abdullah Materials Science Program Department of Applied Physics Faculty of Science and Technology University Kebangsaan Malaysia Selangor Bangi43600 Malaysia Faculty of Science and Technology School of Chemical Sciences and Food Technology University Kepangsaan Malaysia Selangor Bangi43600 Malaysia Faculty of Electronics and Computer Engineering Universiti Teknikal Malaysia Melaka Hang Tuah Jaya Melaka Durian Tunggal76100 Malaysia

In this investigation, we explored the corrosive effects of date palm seed extracted from natural sources and biomass residues on mild steel in a solution of 0.5 M hydrochloric acid (HCl), employing a combination of experimental and theoretical approaches. Our objective was to scrutinize the interaction of the inhibitor with the metal surface, analyze experimental data, and elucidate how the structural characteristics of the inhibitors influence the corrosion process. The experimental results indicated that as the immersion time and temperature increased, the inhibitory effectiveness declined. Notably, the highest level of inhibition occurred when the concentration of date palm seed extract (DPSE) reached 1100 ppm, showcasing peak inhibitory effects of 95.8% and 97.8% through potentiodynamic polarization and electrochemical impedance spectroscopy techniques, respectively. Additionally, an analysis using X-ray diffraction (XRD) was conducted to scrutinize the chemical composition of the mild steel's surface. The adsorption data were evaluated using adsorption isotherms, revealing that DPSE adhered to the Langmuir adsorption isotherm on the mild steel surface. The Langmuir model exhibited the highest linear regression coefficient value and a slope close to unity. The Gibbs free energy () values suggested that the protection afforded by DPSE involved physical and spontaneous absorption. Examination of the results pertaining to the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) indicated that the carboxyl (COOH) group and the C=C bond were the principal regions exhibiting elevated electron acceptance activity. These components were found to be crucial in the adsorption process on the surface of iron (Fe). © 2024, The Authors. All rights reserved.

关键词： Electrochemical impedance spectroscopy

来源：评论

学校读者我要写书评

暂无评论

Theoretical and Experimental studies on Characterisation and Collection of Particulate Matter in Single-Wire, Single-Stage Electrostatic Precipitator with Square Cross-Section

SSRN

引用

SSRN 2024年

作者： Kumar, Aiswarya A. Nawale, Prashant Rohidas Mayya, Y.S. Sahu, Manoranjan Aerosol and Nanoparticle Technology Laboratory Environmental Science and Engineering Department Indian Institute of Technology Bombay Mumbai400076 India Interdisciplinary Program in Climate Studies Indian Institute of Technology Bombay Mumbai400076 India Centre for Machine Intelligence and Data Science Indian Institute of Technology Bombay Mumbai400076 India Chemical Engineering Department Indian Institute of Technology Bombay Mumbai400076 India

Electrostatic precipitation (ESP) is a technology widely used to remove particulate matter (PM) from industrial gas streams. To adopt the same for varying scales as well as for different clean air delivery applications as in indoor and outdoor air pollution, there exists a requirement for the development of comprehensive, readily adaptable, reasonably good, comparable, rigorous, step-by-step analytical theory and experimental validation of same for design of modular units of ESP. In this regard, the current study conducted theoretical and experimental studies to investigate corona characterisation and PM collection efficiency in a modular unit of a single-wire, single-stage, wire-plate ESP with square cross-sectional geometry. The theoretical study integrated the corona discharge model with particle transport model while the experimental study was conducted using a laboratory scale ESP operated at different flow rates and various potentials. Results obtained from both theory and experimental studies for current-voltage (I-V) characteristics were consistent with the well-known quadratic behaviour beyond the critical potential. The best agreement between the I-V characteristics of theory and the experiment was obtained while adjusting the inception electric field ( to 12.35´105 Vm-1 as well as the ion diffusion coefficient value to 0.0647´10-4 m2s-1. Tuned theory predicted PM collection efficiency at three different flow rates of 30, 50 as well as 100 LPM and at various potentials 9 kV, 11 kV as well as 13 kV respectively. Comparing the predicted results from theory and experiment, it is understood that agreement between theory and experiment is acceptable in the case of varied flow rates and is good for potentials for varied size ranges from 13 nm to 800 nm. Relative error for local minimum efficiency between theory as well as experiment for three tested flow rates were 5.37%, 1.36%, 14.58% and was 1.36%, 7.52% and 6.23% for three potentials respectively. As accuracy

关键词： Electrostatic precipitators

来源：评论

学校读者我要写书评

暂无评论

Prelithiation of silicon encapsulated in MOF-derived carbon/ZnO framework for high-performance lithium-ion battery

引用

Nano materials science 2024年

作者： Liu, Congcong Yang, Yang Yao, Yu Dai, Tao Xu, Shitan Yang, Shoumeng Ali, Ghulam Rui, Xianhong Yu, Yan Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter School of Materials and Energy Guangdong University of Technology Guangzhou510006 China Hefei National Research Center for Physical Sciences at the Microscale Department of Materials Science and Engineering CAS Key Laboratory of Materials for Energy Conversion University of Science and Technology of China Anhui Hefei230026 China New Material Co. Ltd China U.S.-Pakistan Center for Advanced Studies in Energy National University of Sciences and Technology Islamabad Pakistan

Silicon possesses a high theoretical capacity, making it a potential contender for lithium-ion battery (LIB) anodes. Nonetheless, its practical usage is challenged by low electrical conductivity and significant volume expansion during cycling. Here, we synthesized a novel silicon/carbon (Si/C) anode doped with ZnO via a template-derived method and high-temperature carbonization. The carbon structure, originated from metal-organic frameworks (MOFs) and ZnO doping, substantially enhanced the electrochemical properties of the composite material. It exhibited an initial capacity of 2 100.3 mA h g−1 at a current density of 0.2 A g−1 and demonstrated excellent capacity retention over successive cycles. Moreover, the composite material displayed superior rate performance at higher current densities of 2 A g−1 and 3 A g−1. To address the low initial Coulombic efficiency (ICE) of silicon-based materials, we adopted a direct contact prelithiation approach and optimized the lithiation process by controlling the prelithiation time. After 30 min of prelithiation, the ICE reached 97.9 %, thereby reducing the initial irreversible capacity loss (ICL) and realizing stable discharge-charge in subsequent cycles. This rational design provides valuable insights for achieving high-performance silicon anode. © 2024 Chongqing University

关键词： II-VI semiconductors

来源：评论

学校读者我要写书评

暂无评论

A multichannel SPR biosensor with a fixed detection system

A multichannel SPR biosensor with a fixed detection system

引用

2010亚洲光电子会议先进的传感系统及其应用分会场

作者： Boonsong Sutapun Armote Somboonkaew Ratthasart Amrit Supanit Porntheeraphat Nongluck Houngkamhang Toemsak Srikhirin Photonics Technology Laboratory National Electronics and Computer Technology Center Thai Microelectronics Center National Electronics and Computer Technology Center112 Thailand Science Park Pahol Yothin Rd.Klong LuangPathumthaniThailand 12120 Materials Science and Engineering Program and Physics Department Faculty of ScienceMahidol UniversityRama 6 Rd.RajathaveeBangkok 10400Thailand

Surface plasmon resonance （SPR） sensors with spectral interrogation provide a high refractive index resolution, a large dynamic range and a fixed optical detection module. In this work, we propose a new spectral detection unit that uses only one spectrometer to measure the SPR spectrum from multiple sensing spots rapidly and serially without any mechanical movement. This spectral detection unit is designed based on a spatial light modulator （SLM） configured as a programmable optical aperture for the spectrometer. To demonstrate this concept, a five-channel SPR sensor was built based on the proposed multichannel detection unit and we evaluated the device performance using a refractive index test. The average device refractive index resolution was 1.4 × 10 -6 refractive index units （RIU）.

关键词： Surface plasmon resonance SPR multichannel detection optical biosensor biosensor

来源：评论

学校读者我要写书评

暂无评论

Low Resistivity-Highly Transparent Zno:Ga Tco's Grown by Laser Ablation

引用

MRS Online Proceedings Library (OPL) 2011年第1期397卷 247-247页

作者： J. M. Siqueiros J.A. Díaz O. Contreras G.A. Hirata J. McKittrick Instituto de Física-UNAM Apdo. Postal 2681 Ensenada B.C. C.P. 22860 México. Dept. of Applied Mechanics and Engineering Sciences and Materials Science Program University of California San Diego La Jolla CA 92093-0411

Highly transparent with low electrical resistivity gallium-doped zinc oxide (ZnO:Ga) thin films were prepared on glass by Pulsed Laser Deposition at different substrate temperatures. ZnO:Ga evaporation targets were prepared by pressing and sintering powder materials obtained with a novel combustion synthesis *** excellent transmittance of more than 85% in the visible range and a low sheet resistance value as low as 13 Ω/sq. were measured on a 200 nm thickness film grown at Ts=300°C. From optical measurements we observed an increase in the ZnO:Ga bandgap when the substrate temperature is raised from 150°C to 300°C. With this, a remarkable improvement in the blue-green region transmittance is obtained.X-Ray diffraction patterns indicate that the films grow highly oriented in the basal plane direction (c-axis) of the hexagonal ZnO grains.

关键词：

来源：评论

学校读者我要写书评

暂无评论

River pollution monitoring over an industrial catchment in urban ecosystem: Challenges and proposed geospatial framework

引用

Environmental Challenges 2022年 7卷

作者： Sekharan, Sheeba Samal, Dipak R. Phuleria, Harish C. Chandel, Munish K. Gedam, Shirish Kumar, Rakesh Sethi, Virendra Supate, Amar R. Karmakar, Subhankar Interdisciplinary Program in Climate Studies Indian Institute of Technology Bombay Mumbai India Environmental Science and Engineering Department Indian Institute of Technology Bombay Maharashtra Mumbai 400076 India Centre of Studies in Resources Engineering Indian Institute of Technology Bombay Mumbai India Centre for Urban Science and Engineering Indian Institute of Technology Bombay Mumbai India National Environmental Engineering Research Institute Nagpur India Faculty of Technology CEPT University Ahmedabad India Maharashtra Pollution Control Board Mumbai India

Urban river pollution is considered a ‘necessary evil’ consequence of disproportionate developmental expansion in metropolises. Unprecedented expansion and anthropic activities amongst other reasons lead to choking of urban rivers with municipal and industrial sewage. Urban rivers are dying while awaiting rescue, despite the hard efforts by civic authorities, largely due to lack of coordination amongst river authorities and stakeholders, underlying conflicts spanning across all levels, balkanisation, pluralization, scarcity of reliable technical data, and financial constraints. Challenges faced by stakeholders in river pollution management as revealed in informational interviews are foregrounded. In an attempt to reduce some of the overwhelm faced by officials on ground, a geospatial framework is proposed which if functionally implemented can transparentize river water quality (WQ) monitoring, and facilitate pollution control. The pollution situation in a persistently polluted urban river near Mumbai city, India was explored and assessed in the middle of a restoration battle waged by environmental activists. Following secondary river water quality data acquisition, primary sample collection campaign and WQ testing, multivariate statistical data analysis was performed under data- and resource-constraint situation. Spatiotemporal monitoring and visualization of river water quality data holds great promise for effectively controlling anthropic river pollution. A subsequent geospatial analysis of the study area was performed using digital elevation model (DEM) based watershed delineation, land use land cover (LULC) classification, mapping of WQ monitoring locations, mapping of industrial clusters, integration of spatial data, and identifying polluter industries. This steered us to formulate and propose the geospatial framework and supplementary recommendations on how better to save this dying river. The framework displays near real-time information on river water qualit

关键词： GIS Industrial catchment Multivariate statistics River pollution Urban ecosystem Urban river

来源：评论

学校读者我要写书评

暂无评论

Ion-Selective Fibers in Constructing Solid Polymer Electrolyte for High-Rate and Long-Cycling Solid-State Batteries

SSRN

引用

SSRN 2022年

作者： Xu, Yifan Bian, Juncao Zhao, Ruo Gao, Lei Li, Yang Kong, Long Guo, Wenhan Chang, Jian Zhu, Jinlong Zhao, Yusheng Institute for Advanced Study Shenzhen University Shenzhen518055 China Guangdong Provincial Key Laboratory of Energy Materials for Electric Power Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology Shenzhen518055 China School of Materials Science and Engineering Peking University Beijing100871 China Northwestern Polytechnical University Xi'An710129 China School of Physical Science Great Bay University Dongguan523000 China

Solid polymer electrolytes (SPEs) show great potential in developing solid-state batteries because of their high flexibility, superior interfacial compatibility and easy processability. Solid fillers, as an important component in SPEs, play a vital role in determining the overall electrochemical performance. Design of well-structured solid fillers with target chemical component can be a way to produce high-performance SPEs. Herein, a metal-organic framework-incorporated fiber with high ion selectivity is synthesized and used as solid filler to prepare fiber-reinforced SPE. The fiber contains rich Lewis acidic sites that can immobilize anions, and abundent -CN and -NH 2 groups that can improve the strengh and stability of the SPE. Consequently, the fiber-reinforced SPE enables a fast Li + conduction and uniform Li + deposition. The as-assembled pouch-type solid-state batteries show outstanding long-term cycling stability (163 mAh g -1 after 520 cycles), while the coin-type cells show excellent rate capability (118.2 mAh g -1 at 2 C after 180 cycles) and enable a high cathode loading. © 2022, The Authors. All rights reserved.

关键词： Fillers

来源：评论

学校读者我要写书评

暂无评论

Spatiotemporal Control of Morphogen Delivery to Pattern Stem Cell Differentiation in Three-Dimensional Hydrogels

引用

Current Protocols in Stem Cell Biology 2019年第1期51卷 e97页

作者： Balikov, Daniel A. Lippmann, Ethan S. Bellan, Leon M. Department of Mechanical Engineering Vanderbilt University Nashville TN United States Interdisciplinary Materials Science Program Vanderbilt University Nashville TN United States Department of Biomedical Engineering Vanderbilt University Nashville TN United States Department of Chemical and Biomolecular Engineering Vanderbilt University Nashville TN United States

Morphogens are biological molecules that alter cellular identity and behavior across both space and time. During embryonic development, morphogen spatial localization can be confined to small volumes in a single tissue or permeate throughout an entire organism, and the temporal effects of morphogens can range from fractions of a second to several days. In most cases, morphogens are presented as a gradient to adjacent cells within tissues to pattern cell fate. As such, to appropriately model development and build representative multicellular architectures in vitro, it is vital to recapitulate these gradients during stem cell differentiation. However, the ability to control morphogen presentation within in vitro systems remains challenging. Here, we describe an innovative platform using channels patterned within thick, three-dimensional hydrogels that deliver multiple morphogens to embedded cells, thereby demonstrating exquisite control over both spatial and temporal variations in morphogen presentation. This generalizable approach should have broad utility for researchers interested in patterning in vitro tissue structures. © 2019 by John Wiley & Sons, Inc. © 2019 John Wiley & Sons, Inc.

关键词： differentiation gradient hydrogel morphogen stem cell tissue engineering

来源：评论

学校读者我要写书评

暂无评论

Assessment of Paleo-hydrology and Paleo-inundation Conditions: The Process

引用

Procedia Environmental sciences 2014年 20卷 747-752页

作者： Pingping Luo Kaoru Takara Bin He Weili Duan Apip Daniel Nover Watanabe Tsugihiro Kenichi Nakagami Izumi Takamiya Disaster Prevention Research Institute (DPRI) Kyoto University Gokasho Uji-shi Kyoto 611-0011 Japan Department of Civil and Earth Resources Engineering Graduate School of Engineering Kyoto University Kyoto Japan AAAS Science and Technology Policy Fellow U.S. Environmental Protection Agency Global Change Research Program Washington D.C. WA USA Graduate School of Global Environmental Studies Kyoto University Sakyo-ku Kyoto 606-8501 Japan Graduate School of Policy Science & College of Policy Science Ritsumeikan University Kyoto Japan Faculty of Literature Arts and Cultural Studies Kinki University Osaka Japan

Paleo-hydrology is an important study which simulates the historical hydrology at the lack of observed period, calibrated at the present period and predicted the future hydrological condition. The study of paleo-hydrology is to obtain the historical evidence for the present hydrology and improve the accuracy of the statistical analysis and the prediction modeling assessment. Paleo-inundation assessment is the study of historical inundation under flood events which occurred prior to direct measurement of hydrologic parameters using modern methods. The ultimate objectives of this study were to estimate paleo-inundation under extreme floods using historical literature and incomplete data records. This paper focused on an application of estimating historical inundation conditions under paleo-floods using modern technologies at the river basin scale.

关键词： Paleo-inundation Paleo-hydrology Nile River basin Flo-2D flood risk management

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：