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Towards Atomic-Resolution Electron Energy Loss Spectroscopy in an Uncorrected 30kV Scanning Electron Microscope

Microscopy and Microanalysis 2024年第SUPPLEMENT_1期30卷

作者： Ramasse, Quentin Kepaptsoglou, Demie Sunaoshi, Takeshi Kaji, Kazutoshi Okada, Satoshi Yamazawa, Yu Saito, Tsutomu Dixon, Michael Azough, Feridoon Freer, Robert SuperSTEM Laboratory SciTech Daresbury Campus Daresbury United Kingdom School of Chemical and Process Engineering & School of Physics and Astronomy University of Leeds Leeds United Kingdom School of Physics Engineering and Technology University of York York United Kingdom Hitachi High-Technologies Corp. Application Development Department Ibaraki Japan Hitachi High-Technologies Corp. Electron Microscope Systems Design1st Dept. Ibaraki Japan Hitachi High-Tech Europe SciTech Daresbury Campus Daresbury United Kingdom School of Materials University of Manchester Manchester United Kingdom

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The inflection point about COVID-19 may have passed

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Science Bulletin 2020年第11期65卷 865-867,M0003页

作者： Chaolin Gu Jie Zhu Yifei Sun Kai Zhou Jiang Gu School of Architecture Tsinghua UniversityBeijing 100085China Jiangsu Branch of China Academy of Urban Planning and Design Nanjing 210000China Department of Geography and Environmental Studies California State University NorthridgeInternational Institute for Innovation and Development(I3D)NorthridgeCA 91326USA School of Architecture Hunan UniversityChangsha 4W082China Hubei Provincial Key Laboratory for Geographical Process Analysis and Simulation Academy of Wuhan Metropolitan AreaCollege of Urban and Environmental ScienceCentral China Normal UniversityWuhan 430079China

In an era of globalization and informatisation,a Public Health Emergency of International Concern(PHEIC)imposes a huge impact on everyone’s life[1],as what the COVID-19 has demonstrated at the *** China’s nationwide quarantine and extremely strict epidemic prevention measures,it becomes increasingly critical for China and the world to know the evolving trend,though unclear yet,for the sake of the global *** is mainly due to the following two important reasons[2].First of all,because of the quarantine,a sudden shutdown of manufacturing in China(now the second largest economy of the world)would break the global supply chain,with the potential to eliminate China’s current advantageous ***,many small enterprises in the service industry are facing death or life situation with the spreading disease,and many will bankrupt[3].When the inflection point of the COVID-19 epidemic appears suddenly becomes a critical issue for China and the world.

关键词： nationwide everyone suddenly

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design and simulation of key mechanism for transverse sealing of fresh food packaging machine

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Journal of Physics: Conference Series 2021年第1期1965卷

作者： Zhaoqi Zheng Bingjian Shi Wenjuan Mei Chaoran Liu Zimin An Pu Shi Ruifang Wang Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry & Food Machinery and Equipment College of Mechanical Engineering Tianjin University of Science & Technology Tianjin 300222 China Tianjin International Joint Research and Development Center of Low-Carbon Green Process Equipment Tianjin China

In order to improve the freshness and safety of fresh food, packaging is necessary for the processing industry of agricultural products. At present, the packaging of fresh food in China is mainly manual packaging, which has high labor intensity and low production efficiency. In response to this situation, this study focused on the transverse sealing device of the fresh food packaging machine. The device completed the transverse sealing operation through the cooperation of two main mechanisms, including an up wind box and an anthropomorphic hand folding mechanism. The anthropomorphic hand folding mechanism was composed of roller, cylinder and lower wind box. This paper makes a study of design and simulation of key mechanism for transverse sealing of fresh food packaging machine, improving the completion of the transverse sealing of the packaging machine. The experiment showed that the designed structure basically satisfied the functional requirements of the fresh food packaging machine for the sealing operation of the transverse sealing device. And the optimal parameter of the air outlet of the up wind box was 640 mm2, the lower wind box of anthropomorphic hand folding mechanism was 19 air outlets with a diameter of 2 mm.

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Dual-Band Electrochromic Smart Window for Dynamic Switching Between Radiative Cooling and Solar Heating

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Advanced Science 2025年 e04483页

作者： Zhao, Xinyu Chen, Qixiang Fan, Fan Wang, Qiliang Su, Yuehong Liu, Minsu Zhu, Fahua Zhao, Dongliang School of Energy and Environment Southeast University Jiangsu Nanjing210096 China Department of Architecture and Built Environment University of Nottingham NottinghamNG7 2RD United Kingdom ARC Research Hub for Smart Process Design and Control Department of Chemical Engineering Monash University MelbourneVIC3800 Australia State Key Laboratory of Low-carbon Smart Coal-fired Power Generation and Ultra-clean Emission China Energy Science and Technology Research Institute Co. Ltd. Nanjing210023 China Institute of Science and Technology for Carbon Neutrality Southeast University Nanjing210096 China Institute for Carbon Neutral Development Southeast University Jiangsu Nanjing210096 China

Electrochromic smart windows can actively modulate their reversible transition between transparent and opaque states, adapting to varying climatic conditions and thereby offering a sustainable solution for energy-efficient buildings. However, the operational range of current electrochromic smart windows is mostly limited to the solar spectrum. Expanding this range into the mid-infrared spectrum could significantly enhance their energy-saving capabilities. In this study, a dynamic electrochromic (EC) glass that integrates silver electrodeposition/dissolution with mechanical flipping of the glass panel is designed. This design enables bidirectional dynamic modulation of both the solar spectrum (0.3–2.5 µm) and mid-infrared spectrum (2.5–20 µm), with solar reflectance varying between 87.9% and 19.9%, and mid-infrared emissivity varying between 90.6% and 10.8%. Consequently, the EC glass can dynamically switch between radiative cooling and solar heating modes. The simulation results show that the architectural application of this EC glass, with climate-specific operating modes, can achieve a maximum of over 50% annual heating, ventilation, and air conditioning (HVAC) energy savings, contributing to carbon neutrality and sustainable development. © 2025 The Author(s). Advanced Science published by Wiley-VCH GmbH.

关键词： Energy efficiency

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Pixel - Based wake interaction and power estimation for a wind farm with irregular boundary

Pixel - Based wake interaction and power estimation for a wi...

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2018 Italian Chapter Conference - Smart Tools and Apps in Computer Graphics, STAG 2018

作者： Ohlsen, Gyde Ruiz-Salguero, Oscar Full, Thomas Acosta, Diego Laboratory of CAD CAM CAE Universidad EAFIT Colombia Department of Wind Energy Technical University Denmark Denmark Institute of Materials Resource Management Augsburg Universitaet Germany Process Development and Design Group Universidad EAFIT Colombia

ISBN: (纸本)9783038680758

In the domain of generation of wind turbine energy, it is central to correctly estimate the interactions among the various turbines in a wind turbine farm. The spatial super-position of turbine wind wakes determines the wind conditions that each turbine in the farm is exposed to and its power output. The current state of the art represents the turbine wakes as a 2D real-valued polygonal trapezoid. The interactions among wakes imply Boolean operations among many trapezoids, producing an intractable fragmentation of the wake intersection and domain regions. The plan (2D) view of the terrain with this wake polygon fragmentation is then used to estimate the effective wind that each turbine receives. This calculation leads to cumbersome computation, which is even more impractical if 3D representations of the terrain, wakes and wind are needed. In response to these limitations, this manuscript presents a method in which the 2D turbine wakes are located on a terrain with holes and exclusion zones bounded by 2D polygons, considering wind direction and turbine array basic specifications. Then, a discretized or pixel approximation of the terrain and wake superposition is calculated using discrete levels of the turbine velocity deficits. This process allows a practical approximation of the power output of each turbine and of the full turbine set. The wake interaction and terrain boundaries are then texture - mapped onto the 3D representation of the terrain, for visualization purposes. As an application, an example of a complex polygonal terrain turbine farm is optimized for maximal power output. This discrete, image - based calculation is particularly convenient in a circumstance in which graphics hardware and GPU processors become increasingly available and efficient, in laptop and mobile devices. This investigation opens research opportunities in mixtures of turbine types, 3D modeling of wind / terrain interaction, and accelerated calculation and visualization with GPU hardw

关键词： Visualization

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The development of China's Yangtze River Economic Belt:how to make it in a green way?

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Science Bulletin 2017年第9期62卷 648-651页

作者： Yushun Chen Shuanghu Zhang Desheng Huang Bai-Lian Li Junguo Liu Wenjin Liu Jing Ma Fang Wang Yong Wang Shengjun Wu Yegang Wu Jinyue Yan Chuanbo Guo Wei Xin Hao Wang Institute of Hydrobiology & State Key Laboratory of Freshwater Ecology and Biotechnology Chinese Academy of Sciences Wuhan 430072 China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research Beijing 100038 China Policy Research Center for Environment and Economy Ministry of Environmental Protection of P.R. China Beijing 100029 China Ecological Complexity and Modeling Laboratory University of California Riverside CA 92521-0124 USA School of Environmental Science and Engineering Southern University of Science and Technology of China Shenzhen 518055 China Orient Landscape Industry Group Ltd. Beijing 100015 China Department of Biological and Environmental Sciences Alabama A&M University Normal AL 35762 USA Key Laboratory of Reservoir Aquatic Environment & Research Center for Ecological Process of Three Gorges' Eco-Environment Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 China Institute of Eco-city Planning and Design Shanghai BoDa Development Corporation Shanghai 200333 China KTH-Royal Institute of Technology SE-10044 Stockholm Sweden & Malardalen University SE-72123 Vasteras Sweden

The Yangtze River is one of the largest and longest rivers in *** river originates in the Tibet-Qinghai Plateau(headwater reach),passes through the mountainous provinces of Sichuan,Yunnan and Chongqing(upper reach),flows into the Central Plain(middle reach)and Lower Plain(lower reach),and finally empties into the East China Sea in Shanghai(estuary).The Yangtze River Economic Belt(YREB;Fig.1)has a surface area of 2.1

关键词： In The development of China’s Yangtze River Economic Belt:how to make it in a green way

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A study of flatness defect in strip rolling occurred in tension unloading

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AIP Conference Proceedings 2016年第1期1769卷

作者： Sami Abdelkhalek Hamid Zahrouni Nicolas Legrand Michel Potier-Ferry 1Milatary academy of Fondouk Jedid 8012 Nabeul Tunisia 2Laboratoire d’Étude des Microstructures et de Mécanique des Matériaux LEM3 CNRS UMR 7239 Université de Lorraine Île du Saulcy F-57045 Metz - Cedex 01 - France 4DAMAS Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures Université de Lorraine France 3ArcelorMittal Global Research and Development. Maizières Process. Voie Romaine B.P. 30320 F- 57283 Maizières-Lès-Metz - Cedex - France

Strips are usually fabricated under tension in tandem mill. They look flat if the tension is large and flatness control is performed via the measurement of transverse residual stress shape. Since compressive residual stresses are the main cause of geometric defect, actuator forces are changed in line to reduce or eliminate them. It is commonly supposed that strips buckle where residual stress field remain compressive. In this paper we show that this relation between residual stress fields and flatness defect is not always valid.

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Modeling and simulation of ultra-fine grinding of alumina in a planetary ball mill

Modeling and simulation of ultra-fine grinding of alumina in...

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26th International Mineral processing Congress, IMPC 2012: Innovative processing for Sustainable Growth

作者： Buddhiraju, V. Maheshwari, S. Rai, B. Moys, M. Runkana, V. Tata Research Development and Design Centre Process Engineering Innovation Laboratory Division of Tata Consultancy Services Ltd. 54-B Hadapsar Industrial Estate Pune - 411013 India School of Chemical and Metallurgical Engineering University of Witwatersrand P Bag 3 Wits 2050 South Africa

ISBN: (纸本)8190171437

Liberation of valuable minerals from low-grade ores is an important challenge faced by the minerals industry. It is necessary to grind the ore to extremely fine size in order to liberate the mineral from such ores. As it is generally difficult to produce ultra-fine particles of diameter less than 1-10 mm using traditional grinding equipment such as the ball mill and the rod mill, several new types of grinding equipment are being explored to produce ultra-fine particles. The planetary ball mill is promising in that it makes grinding to submicron sizes possible by imparting high energy to the ground powder. It consists of four pots mounted on a disc. The pots and the disc rotate in opposite directions. The high-speed rotation of the pots and the disc makes the grinding media move at high centrifugal velocities leading to high impact energy and thus improving the grinding performance. The planetary mill is currently being explored for its capability to produce ultra-fine particles on a large scale. In this context, there is a need to understand the dynamics of the ultra-fine grinding process within the planetary ball mill. Here, we address this need by studying the movement of media inside the pots and the grinding kinetics, employing both experimental and modeling techniques. The experiments were conducted on a laboratory scale planetary ball mill. The particle size distribution of the powder was monitored to allow an estimate of the grinding kinetics to be made while video images of the media profiles inside the pots were taken to allow quantification of the media movement as a function of process variables such as the media size, percent loading, etc. The population balance modeling (PBM) framework was used to simulate the kinetics of grinding while the discrete element modeling (DEM) approach was utilized to simulate the media motion. The parameters in the population balance model, namely, the specific breakage rate and the breakage distribution function were deter

关键词： Grinding (machining)

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Novel VTH self-adjusting MISFET with SiN charge trap layer for ultra low power LSI

Novel VTH self-adjusting MISFET with SiN charge trap layer f...

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International Electron Devices Meeting (IEDM)

作者： Kosuke Tatsumura Atsushi Kawasumi Shigeru Kawanaka Advanced LSI Technology Laboratory Corporate Research and Development Center Toshiba Corporation Yokohama Japan Wireless & Analog Design Department Center of Semiconductor Research and Development Semiconductor & Storage Products Company Toshiba Corporation Yokohama Japan Advanced CMOS Technology Department Device Process Development Center Corporate Research and Development Center Toshiba Corporation Yokohama Japan

A novel V TH self-adjusting FET with SiN charge trap layer is proposed and experimentally demonstrated. The V TH self-adjusting FET has a poly Si/SiN/SiO 2 /Si gate stack and can be introduced to conventional CMOS platform with a small additional cost. The |V TH | of the V TH self-adjusting nFET and pFET decrease on on-state and come back to the initial high value on off-state due to charging and neutralization of the SiN layer by exchange of electrons with gate electrode. The dynamic V TH tuning ability improves both of read and write margins of SRAM. V TH tuning ability of 100mV is achieved by Si-rich SiN film of less than 1nm, which leads to reduction of minimum operating voltage (V DD_min ) of SRAM by 170mV. It is found that switching energy efficiency (energy per a cycle) can be improved largely beyond the limit of conventional FET in ultra low V DD region by V TH self-adjusting function.

关键词： Silicon compounds FETs Logic gates Electron traps Silicon CMOS integrated circuits Switches

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Influences of vertically staggered blades arrangement and draft-tubes spacing field on the flow shear stress in the vertical impinging stream reactor

Influences of vertically staggered blades arrangement and dr...

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International Conference on Materials for Renewable Energy & Environment (ICMREE)

作者： Xia Yang Tao Zhang Liyun Liang Yanyang Wu Fengliang Liu Yu Bi Jia Guo School of Mechanical & Electrical Engineering Wuhan Institute of Technology 430073 China China Ship Development and Design Center Wuhan Hubei 430064 China School of civil engineering Tianjin University 300072 China Key Laboratory for Green Chemical Process of Ministry of Education Wuhan Institute of Technology 430073 China

Flow turbulence intensity is one of the most important indexes in measuring the shear performance of vertical impinging stream reactor (VCISR). The staggered forms of the upper and lower blades and the distances among draft-tube are the significant factors affecting the turbulence intensity in the reactor. In order to explore the law that the structure parameters impact the internal flow field, a series of the numerical simulations are employed to investigate the flow field under different conditions, including various vertically staggered arrangement and diverse draft-tubes spacing in the VCISR. The inclination angle of the blades is set as 45° and the rotate speed is adjusted as 900rpm. The staggered angles β of two paddles are set as 15°, 30°, 45°, 60°, respectively. Two draft-tubes spacing L are set as 8, 10, 12, 14 cm, severally. The computation results show that the turbulence intensity on the characteristics impact surface is the maximum under the condition of β=30°, L=12 cm, at the same time the shear stress is also maximal. In this paper, power consumption and rotating moment of blades are discussed in the reactor. When β=15° and L=8 cm, consuming energy of the reactor and the energy consumption under unit average intensity are minimum; the moment of the rotated blades is minimum at β=30°, L=12 cm. All the results provide the references for selection of the reactor motor and the materials of rotation axes as well as energy consumption.

关键词： Bismuth Fluids Computational modeling

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