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Corrigendum to “Using fuzzy theory and information entropy for water quality assessment in three Gorges region, China” [Expert systems with Applications 37 (3) (2010) 2517–2521]

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Expert systems with Applications 2010年第6期37卷 4720-4720页

作者： Li Liu Jianzhong Zhou Xueli An Yongchuan Zhang Li Yang Dispatch & Communication Center Hunan Electric Power Company Hunan Province Changsha 410007 China College of Hydroelectric and Digitalization Engineering Huazhong University of Science and Technology Hubei Province 430074 Wuhan China State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Thermal Engineering Tsinghua University Beijing 100084 China

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低成本粘土蜂窝SCR催化剂研制及催化性能

低成本粘土蜂窝SCR催化剂研制及催化性能

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第十六届二氧化硫氮氧化物、汞、细颗粒物污染控制技术研讨会

作者： GUO Feng 郭凤 ZHANG Xiong-fei 张雄飞 YU Jian 余剑 LI Jun-jie 李俊杰 XIE Fang-hua 谢放华 XU Guang-wen 许光文 China University of Mining and Technology Beijing State Key Laboratory of Multi-phase Complex System 中国矿业大学化环学院北京 100083 中国科学院过程工程研究所北京 100190 State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy 中国科学院过程工程研究所北京 100190 湘潭大学湖南400115 State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy 中国科学院过程工程研究所北京 100190 School of Chemical Engineering Xiangtan UniversityXiangtan 110142HunanChina 湘潭大学湖南400115

本文从降低烟气SCR催化剂成本出发,研究采用不同粘土原料与成型助剂对蜂窝成型的影响,初步确立了不同助剂的类型及在蜂窝成型中的合适比例.将粘土成型工艺优化参数应用于粘土掺混型SCR脱硝催化剂,比较了催化剂的添加量对催化活性及稳定... 详细信息

本文从降低烟气SCR催化剂成本出发,研究采用不同粘土原料与成型助剂对蜂窝成型的影响,初步确立了不同助剂的类型及在蜂窝成型中的合适比例.将粘土成型工艺优化参数应用于粘土掺混型SCR脱硝催化剂,比较了催化剂的添加量对催化活性及稳定性的影响.结果表明：以粘土为基本载体的蜂窝状催化剂具有较高的催化活性,在固定氨氮比0.8,空速3000h-1的条件下,组成为30％(2％V2O5-5％WO3/TiO2)/粘土的蜂窝催化剂的脱硝率达到80％以上,反应温度窗口为250～500℃,可以满足中温脱硝催化剂的应用要求.

关键词：粘土蜂窝SCR催化剂制备工艺性能表征

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Plasmonic Metasurfaces: Simultaneous Full-Color Printing and Holography Enabled by Centimeter-Scale Plasmonic Metasurfaces (Adv. Sci. 10/2020)

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Advanced Science 2020年第10期7卷 2070051-2070051页

作者： Fei Zhang Mingbo Pu Ping Gao Jinjin Jin Xiong Li Yinghui Guo Xiaoliang Ma Jun Luo Honglin Yu Xiangang Luo State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and Electronics Chinese Academy of Sciences Chengdu 610209 China Key Laboratory of Optoelectronic Technology and System Ministry of Education Chongqing University Chongqing 400030 China School of Optoelectronics University of Chinese Academy of Sciences Beijing 100049 China

In article number https://***/10.1002/advs.201903156 , Xiangang Luo and co‐workers report large‐area ultra‐thin metasurfaces for simultaneous full‐color printing and holography. Under incoherent white light, it appears as a polarization‐ and angle‐encoded full‐color image, while switching to multi‐wavelength holograms under coherent laser illumination. Moreover, it may allow mass production at low cost.

关键词： holograms metasurfaces plasmonics structural colors

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Numerical study of cold filling and tube deformation in the molten salt receiver

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AIP Conference Proceedings 2017年第1期1850卷

作者： Tingting Xu Gongchen Zhang Christophe Peniguel Zhirong Liao Xin Li Jiahui Lu Zhifeng Wang EDF China R&D Center Beijing PR CHINA EDF R&D MFEE 6 Quai Watier Chatou FRANCE State Key laboratory of Solar Thermal Energy and Photovoltaic System Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 CHINA

Molten salt tube cold filling is one way to accelerate the startup of molten salt Concentrated Solar Power (CSP) plant. This practical operation may induce salt solidification and large thermal stress due to tube’s large temperature difference. This paper presents the cold filling study and the induced thermal stress quantitatively through simulation approaches. Physical mechanisms and safe working criteria are identified under certain conditions.

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Infrared Photodetectors: Extrinsic Photoconduction Induced Short-Wavelength Infrared Photodetectors Based on Ge-Based Chalcogenides (Small 4/2021)

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Small 2021年第4期17卷

作者： Ting He Zhen Wang Ruyue Cao Qing Li Meng Peng Runzhang Xie Yan Huang Yang Wang Jiafu Ye Peisong Wu Fang Zhong Tengfei Xu Hailu Wang Zhuangzhuang Cui Qinghua Zhang Lin Gu Hui-Xiong Deng He Zhu Chongxin Shan Zhongming Wei Weida Hu State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences 500 Yutian Road Shanghai 200083 China School of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou 310024 China State Key Laboratory of ASIC and System School of Microelectronics Fudan University Shanghai 200433 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Henan Key Laboratory of Diamond Optoelectronic Materials and Devices School of Physics and Engineering Zhengzhou University Zhengzhou 450001 China

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Evaluation of soil erosion in the Changhua River Basin on Hainan Island based on the Chinese soil loss equation model

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Heliyon 2024年第19期10卷 e38291页

作者： Li, Xiwen Song, Zhenqi Lu, Yuefeng Weng, Baofeng Li, Jing Liu, Yanru Wang, Zhenli Gou, You Haikou Marine Geological Survey Center China Geological Survey Haikou China School of Civil Engineering and Geomatics Shandong University of Technology Zibo China National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land Dongying China State Key Laboratory of Resources and Environmental Information System Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China Zhejiang Academy of Surveying and Mapping Hangzhou China Guiyang Baiyun District Municipal Development and Construction Co. Ltd. Guiyang China

Soil erosion is one of the most serious ecological and environmental problems facing southern China. The Changhua River Basin on Hainan Island is affected by soil erosion, which is causing the soil environment to become more fragile. Compared with the Revised Soil Erosion Equation (RUSLE), the Chinese Soil Loss Equation (CSLE) is based on a large amount of Chinese local data and research results, which more accurately reflect the actual situation of soil erosion in China and therefore have better accuracy and applicability in the Chinese region. By combining GIS and RS technologies, this study establishes the CSLE model of the Changhua River Basin, quantifies the soil erosion data via image elements from 2020 to 2022 using the spatial interpolation method, classifies the erosion intensity, and analyzes the spatial and temporal change characteristics of soil erosion. The statistical results show that, during the period from 2020 to 2022, the area of slight erosion in the Changhua River Basin increased by 553.25 km², with a rate of change of 15.83 %, and the areas of mild erosion, moderate erosion, intense erosion, very intense erosion, and severe erosion decreased by 446.42 km², 64.4 km², 25.73 km², 11.25 km², and 5.45 km², respectively, with rates of change of −31.05 %, −30.08 %, −36.58 %, −18.02 %, and −13.85 %, respectively. Slight erosion is defined as soil erosion less than the permissible soil loss and is not regarded as soil erosion, and the other erosion intensities showed a yearly decreasing trend, indicating that the soil erosion control was effective during this three-year period. In the work of soil and water conservation, it is especially necessary to determine the main factors influencing soil erosion and predict the areas that may be prone to such erosion. Therefore, on the basis of establishing a characteristic model using land use type, slope and soil type, and through superposition an

关键词： China soil erosion model Soil erosion Spatial interpolation Superposition analysis Temporal and spatial change characteristics

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Foot terrain impact modeling and motion performance research of hexapod robot based on passive elastic leg

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Journal of Physics: Conference Series 2020年第5期1507卷

作者： Y F Liu B Su L Zhou H B Gao L Ding L Jiang F Q Zou C Y Ma China North Vehicle Research Institute Beijing 100072 China Equipment project management center Beijing 100072 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin 150080 China MEMS center Harbin Institute of Technology Harbin 150080 China College of Mechanical Engineering Jiamusi University Jiamusi 154007 China

In order to improve the performance of the multi-legged robot, the impact of foot-terrain is an important target to measure the performance of the robot. In order to ensure the compliance contact of foot-terrain for the legged robot, it is essential to add passive spring between the calf and foot. The mechanical structure makes the leg of hexapod robot retractable passive elastic structure. For multi-legged robots with passive elastic legs, the foot-terrain impact model is presented to measure the dynamic performance and provide theoretical support for the low impact force motion planning. The traditional planning method will cause additional impact for the switching case between the swing and stance phase. This paper presents a motion planning method that considers the deformable leg structure and impact performance. The experiments have been carried out, and the results have demonstrated the effectiveness of the foot terrain impact model and motion planning method in comparison with a conventional method.

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Droop control Based Seamless Transfer Strategy for Three-phase Converter in Microgrid

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IOP Conference Series: Earth and Environmental Science 2018年第1期192卷

作者： Guopeng Zhao Xinwei Zhou Hongwei Yang Feng Xu Yanjie Wang State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University) Beijing China 102206 School of Electrical and Electronic Engineering North China Electric Power University Beijing China 102206 State Grid Zhejiang Electric Power Research Institute Zhejiang China 310000

This paper proposes a seamless transfer strategy based on the droop control strategy for three-phase converter in microgrid, which consists of the voltage limiter and the frequency limiter. In grid-connected mode, both the two limiters don't work, and the VSC is controlled by PQ control, transmitting constant power between micro-sources and power grid. When the unplanned islanding occurs, the PCC voltage and frequency may exceed the allowable range because the reference of active power and reactive power are not equal to the loads power. Then the voltage limiter and the frequency limiter begin to take effect, ensuring the power supply quality for loads. The difference between the input signal of these two limiter and the output signal will pass through the proportional regulator, and the new references of active power and reactive power can be obtained according to the droop curve. After the islanding detection detects the islanding condition, the control strategy will be changed to the droop control. All the converters can work in parallel and provide the voltage and frequency supply for loads. At last, the simulation results verified the proposed seamless transfer strategy.

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A development and application of maintainability evaluation system using immersive VR

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IOP Conference Series: Materials Science and engineering 2019年第1期658卷

作者： Meihui Wang Yongxiang Li Chuan Lyu Xi Liu School of Reliability and Systems Engineering Beihang University China State Key Laboratory of Virtual Reality Technology System Beihang University China Technology and Engineering Center for Space Utilization Chinese Academy of Science Beijing China Xi'an Modern Control Technology Research Institute Xi'an 710065 China

Immersing into virtual reality (VR) is a perception of being physically present in a non-physical world. Using immersive VR in maintenance brings great conveniences. For example, using virtual human operating in hazardous environment before the real person, which can prevent being hurt. In this paper, a system of immersive virtual maintenance (IVM) is presented. It is divided into three parts. The first part is Input, which contains the maintenance task and maintenance design. The second part is Method, with which making the virtual human and the users act in a unified way. The key to build IVM system is the interface between the motion capture system and virtual simulation software. The third part is Output, which presents the maintainability evaluation results. This paper focuses on how to build IVM system, the difficulties and solutions also be detailed. At last, a simple application is given

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DeePMD-kit v2: A software package for Deep Potential models

arXiv

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arXiv 2023年

作者： Zeng, Jinzhe Zhang, Duo Lu, Denghui Mo, Pinghui Li, Zeyu Chen, Yixiao Rynik, Marián Huang, Li'ang Li, Ziyao Shi, Shaochen Wang, Yingze Ye, Haotian Tuo, Ping Yang, Jiabin Ding, Ye Li, Yifan Tisi, Davide Zeng, Qiyu Bao, Han Xia, Yu Huang, Jiameng Muraoka, Koki Wang, Yibo Chang, Junhan Yuan, Fengbo Bore, Sigbjørn Løland Cai, Chun Lin, Yinnian Wang, Bo Xu, Jiayan Zhu, Jia-Xin Luo, Chenxing Zhang, Yuzhi Goodall, Rhys E.A. Liang, Wenshuo Singh, Anurag Kumar Yao, Sikai Zhang, Jingchao Wentzcovitch, Renata Han, Jiequn Liu, Jie Jia, Weile York, Darrin M. Weinan, E. Car, Roberto Zhang, Linfeng Wang, Han Laboratory for Biomolecular Simulation Research Institute for Quantitative Biomedicine Department of Chemistry and Chemical Biology Rutgers University PiscatawayNJ08854 United States AI for Science Institute Beijing100080 China DP Technology Beijing100080 China Academy for Advanced Interdisciplinary Studies Peking University Beijing100871 China HEDPS CAPT College of Engineering Peking University Beijing100871 China College of Electrical and Information Engineering Hunan University Changsha China Yuanpei College Peking University Beijing100871 China Program in Applied and Computational Mathematics Princeton University PrincetonNJ08540 United States Department of Experimental Physics Comenius University Mlynská Dolina F2 Bratislava842 48 Slovakia Center for Quantum Information Institute for Interdisciplinary Information Sciences Tsinghua University Beijing100084 China Center for Data Science Peking University Beijing100871 China ByteDance Research Zhonghang Plaza No. 43 North 3rd Ring West Road Haidian District Beijing China College of Chemistry and Molecular Engineering Peking University Beijing100871 China Baidu Inc. Beijing China Key Laboratory of Structural Biology of Zhejiang Province School of Life Sciences Westlake University Zhejiang Hangzhou China Westlake AI Therapeutics Lab Westlake Laboratory of Life Sciences and Biomedicine Zhejiang Hangzhou China Department of Chemistry Princeton University PrincetonNJ08544 United States SISSA Scuola Internazionale Superiore di Studi Avanzati Trieste34136 Italy Laboratory of Computational Science and Modeling Institute of Materials École Polytechnique Fédérale de Lausanne Lausanne1015 Switzerland Department of Physics National University of Defense Technology Hunan Changsha410073 China State Key Lab of Processors Institute of Computing Technology Chinese Academy of Sciences Beijing China University of Chinese Academy of Sciences Beijing China School of Electronics Engineerin

DeePMD-kit is a powerful open-source software package that facilitates molecular dynamics simulations using machine learning potentials (MLP) known as Deep Potential (DP) models. This package, which was released in 2017, has been widely used in the fields of physics, chemistry, biology, and material science for studying atomistic systems. The current version of DeePMD-kit offers numerous advanced features such as DeepPot-SE, attention-based and hybrid descriptors, the ability to fit tensile properties, type embedding, model deviation, Deep Potential - Range Correction (DPRc), Deep Potential Long Range (DPLR), GPU support for customized operators, model compression, non-von Neumann molecular dynamics (NVNMD), and improved usability, including documentation, compiled binary packages, graphical user interfaces (GUI), and application programming interfaces (API). This article presents an overview of the current major version of the DeePMD-kit package, highlighting its features and technical details. Additionally, the article benchmarks the accuracy and efficiency of different models and discusses ongoing developments. © 2023, CC BY-NC-ND.

关键词： Molecular dynamics

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