检索结果-内蒙古大学图书馆

Removal of europium by green tea mediated zero valent iron nanoparticles

Materials Today: Proceedings 2023年

作者： Ananya Jena Dharitri Dube Soumya Mishra Prasanta Kumar Sahoo Naresh Kumar Sahoo Department of Chemistry Environmental Science Program (ITER) Siksha ‘O’ Anusandhan (Deemed to be University) Bhubaneswar 751030 Odisha India Department of Mechanical Engineering (ITER) Siksha ‘O’ Anusandhan (Deemed to be University) Bhubaneswar 751030 Odisha India

Europium is the rarest and one of the least abundant rare-earth elements in the world. There are many chemical methods for this extraction of europium, among them application of green synthesized nanomaterial zero-valent iron (nZVI) is a very propitious, inexpensive, and eco-friendly technique. The nZVI nanoparticle was synthesized using green tea extract and applied for the reductive extraction of europium [Eu (III)] from an aqueous solution. The presence of polyphenolic compounds in the green tea extract was used as a reducing agent for the efficient formation of stabilized GT-nZVI. The green synthesized GT-nZVI nanoparticle was characterized by XRD and FTIR techniques. The performance evaluation of GT-NZVI for Eu removal was carried out under batch experiments with various experimental conditions such as, change in pH, initial Eu concentration, reaction time, and temperature. Almost 83 % of Eu was removed at pH 5 while only 65 % at pH 4 at 100 mg/L of initial Eu concentrations. GT-nZVI also shows better removal efficiency at high temperatures. According to the Langmuir isotherm model, GT-nZVI nanoparticles showed an adsorption capacity of 217.39 mg/g. The green synthesized nanoparticles also have good reusability capacity up to 4 consecutive adsorption cycles.

关键词： Green tea extracts Zero valent iron Polyphenolic compounds Europium Adsorption isotherm

来源：评论

学校读者我要写书评

暂无评论

Versatile Optothermal Micro/Nanorobots for Cellular Biology

Versatile Optothermal Micro/Nanorobots for Cellular Biology

引用

Conference on Lasers and Electro-Optics (CLEO)

作者： Hongru Ding Zhihan Chen Yuebing Zheng Walker Department of Mechanical Engineering The University of Texas at Austin Austin TX USA Materials Science & Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX USA

We develop a new type of low-power optical platform - optothermal robots - to achieve versatile three-dimensional (3D) manipulation of colloidal particles and biological cells at nanoscale resolution for single-cell s... 详细信息

ISBN: (数字)9781943580767

ISBN: (纸本)9781728144184

关键词： Three-dimensional displays Nanobioscience Laser beams Laser modes Biomedical optical imaging Optical imaging

来源：评论

学校读者我要写书评

暂无评论

Effects of oxygen availability on Nb-Si multilayer processed by plasma transferred arc

Effects of oxygen availability on Nb-Si multilayer processed...

引用

Materials Science and Technology 2019, MS and T 2019

作者： Cardozo, Eloisa Pereira D'Oliveira, Ana Sofia C.M. Post Graduation Program on Materials Science and Engineering Universidade Federal do Paraná Curitiba Paraná Brazil Department of Mechanical Engineering Universidade Federal do Paraná Curitiba Paraná Brazil

ISBN: (纸本)0873397703

The need for higher propulsive and thermal efficiency in high temperature equipment has induced the search for materials that can withstand such harsh operating conditions. Within this group, the Nb-Si alloy system offers an attractive set of properties although they still present a challenge regarding the effects of oxygen. To address the role of processing environment on microstructure and oxidation performance of a Nb-Si multilayer, a powder mixture (Nb37wt%Si) were deposited under an argon atmosphere and in air. NbSi2 and Nb5Si3 were identified in multilayers processed with Nb37wt%Si mixture. The argon atmosphere accounts for changes in phase morphology and also for the enhanced oxidation resistance. This behavior can be accounted for by the high solubility of oxygen on silicides, that contributes to entrap oxygen in multilayers processed in air compromising oxidation performance. © 2019 MS&T19®

关键词： 3D printers

来源：评论

学校读者我要写书评

暂无评论

IMPACT: A strategic partnership for sustainable development in marine systems and robotics

IMPACT: A strategic partnership for sustainable development ...

引用

2020 IEEE / ITU International Conference on Artificial Intelligence for Good, AI4G 2020

作者： Maurelli, Francesco Krupinski, Szymon Pascoal, Antonio Miskovic, Nikola Kyriakopolous, Kostas Ridao, Pere Kruusmaa, Maarja Bachmayer, Ralf Marine Systems and Robotics Jacobs University Bremen Bremen Germany Instituto Superior Tecnico Universidade de Lisboa Lisbon Portugal Lab. for Underwater Sys. and Technologies University of Zagreb Zagreb Croatia School of Mechanical Engineering National Technical University of Athens Athens Greece Universitat de Girona Department of Computer Engineering Catalonia Spain Centre for Biorobotics TalTech Tallinn Estonia Marum Universität Bremen Bremen Germany

ISBN: (纸本)9781728170312

The Sustainable Development Goals (SDGs), also known as the Global Goals, were adopted by all United Nations Member States in 2015 as a universal call to action to end poverty, protect the planet and ensure that all people enjoy peace and prosperity by 2030. All sectors of the society need to be involved in order to achieve those goals. This paper represents an initiative among several universities to explicitly look at the UN SDGs from the higher education perspective, in the field of marine systems and robotics, fostering self-reflection, developing specific actions addressing several goals. Currently half-way in the project life, the preliminary results and the activities performed up to now are very promising, bringing academia closer to the implementation of the Agenda 2030. © 2020 IEEE.

关键词： Sustainable development

来源：评论

学校读者我要写书评

暂无评论

Applying sustainable city assessment framework for Chiang Mai’s future urban development

引用

AIP Conference Proceedings 2022年第1期2681卷

作者： Wiwat Pongruengkiat Preda Pichayapan Korrakot Y. Tippayawong Nakorn Tippayawong 1Graduate Program in Energy Engineering Faculty of Engineering Chiang Mai University Chiang Mai Thailand 2Department of Civil Engineering Faculty of Engineering Chiang Mai University Chiang Mai Thailand 3Department of Industrial Engineering Faculty of Engineering Chiang Mai University Chiang Mai Thailand 4Department of Mechanical Engineering Faculty of Engineering Chiang Mai University Chiang Mai Thailand

Sustainable city development concerns various dimensions such as citizen well-being, urban infrastructure, environmental friendliness, accessible transportation, and solid economics. Effective utilization of resources and energy is inevitable if a city wishes to transit towards sustainability. A sustainable city assessment framework is a useful tool in measuring and evaluating the management of the city resources without negative impact on the environment, facilitating the city to grant the well-being of the citizen in terms of safety, happiness, and convenience. The management can make use of the framework in planning and executing various policies for robust economic growth. Moving towards a status of a sustainable city is of great interest to an emerging city like Chiang Mai in Thailand. As a case study, Chiang Mai is unique in terms of its medium size, with the potential to be the regional hub. Chiang Mai is the 2nd largest city in Thailand, located in a strategic location and surrounded by diverse and nice natural environments, and is the center of medical and education excellence in northern Thailand. In this works, an overview of sustainable city indicators employed for several cities was conducted. The suitability of key indices was evaluated and discussed against the context of Chiang Mai. The Thai government's bio-circular-green (BCG) economy concept was also considered for economic and social development along with environmental protection to properly realize the potential of the city. From the preliminary findings, potential indicators of the sustainable city assessment may be grouped into three main components: economic, social, and environmental. Useful plans and guidelines from the sustainable city assessment framework were also proposed for the future development and expansion of Chiang Mai.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Supersaturated Solid Solution Enhanced Biodegradable Zn-Mn Alloys Prepared by mechanical Alloying and Selective Laser Melting

SSRN

引用

SSRN 2022年

作者： Shuai, Cijun Zhao, Yang Li, Chuanzhi Deng, Youwen Zhao, Zhenyu Gao, Chengde State Key Laboratory of High Performance Complex Manufacturing College of Mechanical and Electrical Engineering Central South University Changsha410083 China Institute of Additive Manufacturing Jiangxi University of Science and Technology Nanchang330013 China Department of Periodontics & Oral Mucosal Section Xiangya Stomatological Hospital Xiangya School of Stomatology Central South University Changsha410000 China School of Sino-German Robotics Shenzhen Institute of Information Technology Shenzhen518172 China

Zn-Mn alloys have been recognized as promising biodegradable metals due to moderate degradation and good osteogenesis. However, the alloying content of Mn has been severely limited by the low solid solubility (0.8 wt.%) in conventional preparation process to avoid the excessive formation of brittle intermetallics. In this work, supersaturated solid solution was achieved in Zn-Mn alloys via mechanical alloying (MA) and selective laser melting (SLM). During MA process, the mixed Zn and Mn powders experienced repeated welding and fracturing, which resulted in refined grains and abundant crystal defects that stored extra energy. This could reduce the energy barrier of interatomic diffusion and induce the rapid diffusion of Mn atoms, leading to supersaturated solid solution with ~3.6 wt.% Mn homogeneously dissolved in Zn lattices. Moreover, the rapid solidification process of SLM effectively maintained the metastable supersaturated structure. In addition, the Zn-15Mn alloys prepared by MA and SLM were composed of fine equiaxed grains (~4.34 μm) and high content of high-angle grain boundaries (54.8%). Owing to solution strengthening and grain refinement, the Zn-15Mn alloy prepared by MA and SLM exhibited a compressive yield strength of 178 MPa which was 2.8 times and 1.6 times those of pure Zn and Zn-15Mn alloy without MA process, respectively, as well as a more ductile fracture. Meanwhile, the Zn-Mn alloys exhibited accelerated degradation and comparable cytocompatibility to pure Zn. These findings indicated that the combined process of MA and SLM may be an efficient strategy for the preparation of alloys characterized by supersaturated solid solution and refined grain structure. © 2022, The Authors. All rights reserved.

关键词： Solid solutions

来源：评论

学校读者我要写书评

暂无评论

Temperature-dependent crystal structure of U3Si2 by high-temperature neutron diffraction 14

Temperature-dependent crystal structure of U3Si2 by high-tem...

引用

14th International Nuclear Fuel Cycle Conference, GLOBAL 2019 and Light Water Reactor Fuel Performance Conference, TOP FUEL 2019

作者： Vogel, Sven C. Wilson, Tashiema L. Wood, Elizabeth Sooby White, Joshua T. Besmann, Theodore M. Materials Science and Technology Division Los Alamos National Laboratory MS H805 Los AlamosNM87545 United States Mechanical Engineering Department Nuclear Engineering Program University of South Carolina 541 Main St ColumbiaSC29201 United States Department of Physics and Astronomy College of Sciences University of Texas at San Antonio One UTSA Circle San AntonioTX78249 United States

The crystal structure of the U3Si2 line compound in the U-Si system was investigated as a function of temperature from room temperature to 1373 K using high temperature neutron time-of-flight diffraction on the High-pressure Pressure/preferred Preferred Orientation (HIPPO) diffractometer at the Los Alamos Neutron Science Center (LANSCE). The U-Si system is actively researched due to its promise as an accident tolerant nuclear fuel. The simultaneous Rietveld refinement of five histograms from the five HIPPO detector rings provided fundamental datasets for the lattice parameters, anisotropic atomic displacement parameters, and atomic positions as a function of temperature. To explore the possibility of a homogeneity range, two samples were analyzed, stoichiometric U3Si2.00 and a hyperstoichiometric U3Si2.01. While minor differences in the thermal expansion anisotropic atomic displacement parameters between the two samples were observed, over the entire investigated temperature range no additional phases were observed. However, significant differences in the thermal expansion behavior were identified between the two compositions that warrant future investigations. Copyright © GLOBAL 2019 - International Nuclear Fuel Cycle Conference and TOP FUEL 2019 - Light Water Reactor Fuel Performance *** rights reserved.

关键词： Atoms

来源：评论

学校读者我要写书评

暂无评论

Network Characterization of Goods Movement in Indonesia

引用

IOP Conference Series: Materials Science and engineering 2021年第1期1096卷

作者： B M Sopha A Setiawan Industrial Engineering Program Department of Mechanical and Industrial Engineering Universitas Gadjah Mada (UGM) Yogyakarta INDONESIA

Network characterization of goods movement is particularly important to estimate needs and accurate management for freight transportation. The present study aims at characterizing the network of goods movement in Indonesia and examining the effectiveness of network characterization for prediction purpose. A network approach using RStudio was applied. It was found that the network of goods movement in Indonesia is characterized by weak inter-provincial goods movement, scale-free network, disassortative, having rich-club phenomenon, and having a core-periphery structure in which Sumatera Barat (West Sumatera) and Jawa Barat (West Java) appears to be the cores of the network. The findings also demonstrate that the prediction model developed by characterization performs better and can explain, on average, 39% of the variances. The prediction models for chemicals, fuel, meat and livestock, fish, crude oil, and fertilizer, have even better capability to explain variances in the volumes of goods movement by more than 60%. Potential avenues for future research are also discussed.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Characterization and drying of oxyhydroxides for dry storage of aluminum-clad spent fuel

Characterization and drying of oxyhydroxides for dry storage...

引用

2019 Transactions of the American Nuclear Society, ANS 2019

作者： Shalloo, Matthew Fuentes, Roderick d'Entremont, Anna Sindelar, Robert Knight, Travis W. Nuclear Engineering Program Department of Mechanical Engineering University of South Carolina ColumbiaSC29208 United States Savannah River National Laboratory AikenSC29808 United States

Research reactors such as the Advanced Test Reactor (ATR) and the High Flux Isotope Reactor (HFIR) employ aluminum-clad fuel elements made up of many thin plates with uranium dispersed inside. In most engineering applications, aluminum is considered to have favorable corrosion characteristics. It forms a thin oxide layer [Al2O3] under atmospheric conditions that is impenetrable to oxygen thus stopping any further corrosion. However, both aluminum metal and Al2O3 react with water to form hydrous oxides which are less protective against further corrosion and form significantly thicker layers than oxidation in dry air. As a result, aluminum-clad spent nuclear fuel (ASNF) hosts chemically bound water on the fuel surface. This is a challenge for sealed dry storage of ASNF because the water in the hydroxides could be released as free water or decomposed by radiolysis leading to further corrosion and the buildup of flammable gases (H2 and O2). The goal of this research is to study the formation of lab-grown oxides on aluminum samples as surrogates for those on ASNF, characterize those oxide layers, and formulate an effective drying regimen that removes both bulk and chemisorbed water. Testing of aluminum oxide powder samples by Thermogravimetric Analysis and Differential Scanning Calorimetry (TGA/DSC) has been performed to determine the temperature threshold for dewatering and to quantify drying parameters. A controlled atmosphere chamber has been constructed for testing varied drying procedures on bulk samples. Imaging by Scanning Electron Microscope (SEM) and analysis by X-Ray Diffraction (XRD) took place throughout the research for a detailed understanding of the microstructure and composition at each stage of the process. © 2019 American Nuclear Society. All rights reserved.

关键词： Aluminum oxide

来源：评论

学校读者我要写书评

暂无评论

Strategic learning for disturbance rejection in multi-agent systems: Nash and Minmax in graphical games

arXiv

引用

arXiv 2025年

作者： Wang, Xinyang Guay, Martin Wang, Shimin Zhang, Hongwei Guangdong Provincial Key Laboratory of Intelligent Morphing Mechanisms and Adaptive Robotics School of Mechanical Engineering and Automation Harbin Institute of Technology Guangdong Shenzhen518055 China Department of Chemical Engineering Queen’s University KingstonONK7L 3N6 Canada Massachusetts Institute of Technology CambridgeMA02139 United States Harbin Institute of Technology Guangdong Shenzhen518055 China

This article investigates the optimal control problem with disturbance rejection for discrete-time multi-agent systems under cooperative and non-cooperative graphical games frameworks. Given the practical challenges of obtaining accurate models, Q-function-based policy iteration methods are proposed to seek the Nash equilibrium solution for the cooperative graphical game and the distributed minmax solution for the non-cooperative graphical game. To implement these methods online, two reinforcement learning frameworks are developed, an actor-disturber-critic structure for the cooperative graphical game and an actor-adversary-disturber-critic structure for the non-cooperative graphical game. The stability of the proposed methods is rigorously analyzed, and simulation results are provided to illustrate the effectiveness of the proposed methods. Copyright © 2025, The Authors. All rights reserved.

关键词： Disturbance rejection

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：