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Preparation and Properties of Rice Hull Ash as the catalysis supporter in the fluidized-bed reactor

IOP Conference Series: Earth and Environmental science 2021年第1期766卷

作者： Zhaohui Teng Shan Huang Heng Xu Na Li Qulan Zhou College of energy Chengdu University of Tecnoogy Chengdu 610059 China National Key Laboratory of Nuclear Reactor System Design Technology Nuclear Power Institute of China Chengdu 610200 China shenzhen ILNG energy technology CO. LTD Shenzhen 518061 China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China

This research focuses on the preparation and properties of rice hull ash(RHA). We prepared RHA from combustion of rice husk in the fluidized-bed reactor. The temperature field of the furnace was steady and bellow 850°C to keep SiO2 amorphous. XRD, BET and SEM were applied in the characterization tests to investigate the effect of flow rate(u), the higher primary-secondary wind ratio(i) and relative height of bed material. The optimal combustion condition for preparing RHA was discussed. RHA obtained from rice hull contains abundant amorphous SiO2 (>90%) and the characterization results of RHA show its potential to be a good catalyst supporter.

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Higher-Order Kinematics Modeling of 3-RRS Parallel Mechanism Based on CGA

Research Square

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Research Square 2020年

作者： Wang, Chang Zhao, Tie-Shi Li, Er-Wei Zhao, Yan-Zhi Bian, Hui Geng, Ming-Chao Parallel Robot and Mechatronic System Laboratory Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of National Education Yanshan University Qinhuangdao066004 China School of Mechanical Engineering Hebei University of Architecture Zhangjiakou075000 China

Higher-order kinematics of mechanisms has been applied in servo motor control, human-robot interaction and machinery life design fields, etc. The representations of acceleration and jerk by screws have been fully developed by researchers with the methods of the differential of the matrix representation of SE(3) group. Clifford algebra, which is tighter and with higher computational efficiency than the matrix method, is another representation of the motions of rigid bodies. It has been used in position kinematics, grub task motion planning, and robot vision for its convenience of geometric representations and calculations. As far as we know, the work of higher-order kinematics of mechanisms based on Clifford algebra is rare. First, after recalling the based theory of motion representation in conformal geometric algebra (CGA), the mathematical relationships between flag and motor are built. Second, a method for the higher-order kinematics modeling of serial chain mechanisms is proposed. Finally, the higher-order kinematics of the 3-RRS parallel mechanism is built to prove the correctness of the algorithm. This work further enriches the application of CGA for the higher-order kinematics modeling of parallel mechanisms. © 2020, CC BY.

关键词： Kinematics

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Tetrazine-Isonitrile Bioorthogonal Fluorogenic Reactions Enable Multiplex Labeling and Wash-Free Bioimaging of Live Cells

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Angewandte Chemie 2024年第10期136卷

作者： Yingqiao Deng Tianruo Shen Xinyu Yu Jie Li Peixuan Zou Prof. Qiyong Gong Prof. Yongxiang Zheng Prof. Hongbao Sun Prof. Xiaogang Liu Prof. Haoxing Wu Department of Radiology and Huaxi MR Research Center (HMRRC) Functional and Molecular Imaging Key Laboratory of Sichuan Province and Frontiers Science Center for Disease Related Molecular Network West China Hospital Sichuan University Huaxi Research Building 001 4th Keyuan Road 610041 Chengdu China Science Mathematics and Technology Cluster Singapore University of Technology and Design 8 Somapah Road 487372 Singapore Singapore Department of Biopharmaceutics West China School of Pharmacy Sichuan University No.17 People's South Road 610041 Chengdu China Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University No.17 People's South Road 610041 Chengdu China

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Research on the Control Strategy Based on Peak-Prediction for the Pulse power supply

Research on the Control Strategy Based on Peak-Prediction fo...

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International Conference on Electrical Machines and systems (ICEMS)

作者： Xiao Zhang Junyong Lu Yufeng Dai Wenxuan Wu Xin Wang Tao Ma National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval Universigy of Engineering Wuhan China

ISBN: (纸本)9781728133997

The capacitive Pulse power supply is widely utilized in the electromagnetic launch system. And the ideal launcher current is in the square-shape. To solve the problem of the precise current control of the supply, a new control strategy is proposed based on the prediction of the peaks of the output current. First, the mathematical model is built for the system composed of the capacitive Pulse power supply and the rail-type electromagnetic launcher. Then the time sequential control strategy is proposed. And the effectiveness of the proposed method is validated by simulation. Based on the proposed strategy, the local peaks of the output current and the peaks of the acceleration can be precisely controlled as required, which is essential for the design of the guided projectile.

关键词： Projectiles Power supplies Rails Electromagnetics Mathematical model Acceleration

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Analytical Modeling and Thermal Effect Analysis of Electromagnetic Rail Launcher

Analytical Modeling and Thermal Effect Analysis of Electroma...

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International Conference on Electrical Machines and systems (ICEMS)

作者： Feifei Yan Junyong Lu Junwei Cui Yongsheng Zhang Biao Wu Wei Guo National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan China

ISBN: (纸本)9781728133997

The large thermal energy in launching because of high-current and high-speed affect the engineering application of electromagnetic rail launcher. In this paper, considering the inductance gradient and the resistance gradient, the circuit model of Electromagnetic Rail Launcher including PFN, rail, armature and cable is established, the motion model of armature position, speed and current are taken for interative analytical calculation by using Matlab. The data contrast with other literature and experimental shows that the model is correct and effective. The heating effect analysis of Electromagnetic Rail Launcher include Joule energy of rail resistance, cable and induction, friction energy between armature and rail, etc. Comparison with the kinetic energy of projectile, the thermal energy of rail including resistance and friction and Joule energy of cable take a large proportion in system energy. The paper provides a basis for the cooling design of Electromagnetic Rail Launcher.

关键词： Rails Electromagnetics Resistance Inductance Resistance heating Mathematical model Capacitors

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Data-Driven design Space Exploration and Exploitation for design for Additive Manufacturing (vol 141, 101101, 2019)

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JOURNAL OF MECHANICAL design 2019年第11期141卷 1-12页

作者： Xiong, Yi Pham Luu Trung Duong Wang, Dong Park, Sang-In Ge, Qi Raghavan, Nagarajan Rosen, David W. Digital Manufacturing and Design Centre Singapore University of Technology and Design Digital Manufacturing and Design Centre Singapore University of Technology and Design Robotics Institute School of Mechanical EngineeringState Key Laboratory of Mechanical System and VibrationShanghai Jiao Tong University Department of Mechanical Engineering and Robotics Incheon National University Science and Math Cluster and Digital Manufacturing and Design Centre Singapore University of Technology and Design Engineering Product Development Pillar and Digital Manufacturing and Design Centre Singapore University of Technology and Design Digital Manufacturing and Design Centre Singapore University of Technology and Design The G. W. Woodruff School of Mechanical Engineering Georgia Institute of Technology

Recently, design for additive manufacturing has been proposed to maximize product performance through the rational and integrated design of the product, its materials, and their manufacturing processes. Searching design solutions in such a multidimensional design space is a challenging task. Notably, no existing design support method is both rapid and tailored to the design process. In this study, we propose a holistic approach that applies data-driven methods in design search and optimization at successive stages of a design process. More specifically, a two-step surrogate model-based design method is proposed for the embodiment and detailed design stages. The Bayesian network classifier is used as the reasoning framework to explore the design space in the embodiment design stage, while the Gaussian process regression model is used as the evaluation function for an optimization method to exploit the design space in detailed design. These models are constructed based on one dataset that is created by the Latin hypercube sampling method and then refined by the Markov Chain Monte Carlo sampling method. This cost-effective data-driven approach is demonstrated in the design of a customized ankle brace that has a tunable mechanical performance by using a highly stretchable design concept with tailored stiffnesses.

关键词： design

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0.04 degree-per-hour MEMS disk resonator gyroscope with high-quality factor (510 k) and long decaying time constant(74.9 s)

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Microsystems & Nanoengineering 2018年第1期4卷 46-56页

作者： Qingsong Li Dingbang Xiao Xin Zhou Yi Xu Ming Zhuo Zhanqiang Hou Kaixuan He Yongmeng Zhang Xuezhong Wu College of Intelligence Science National University of Defense TechnologyChangsha 410073China Laboratory of Science and Technology on Integrated Logistics Support National University of Defense TechnologyChangsha 410073China State Key Laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghai 200433China East China Institute of Photo-Electron IC Bengbu 233042China

The disk resonator gyroscope is an attractive candidate for high-performance MEMS *** gyroscope consists of a sensor and readout electronics,and the characteristics of the sensor directly determine the *** the sensor,a high-quality factor and long decaying time constant are the most important characteristics required to achieve high *** report a disk resonator gyroscope with a measured quality factor of 510 k and decaying time constant of 74.9 s,which is a record for MEMS silicon disk resonator gyroscopes,to the best of our *** improve the quality factor of the DRG,the quality factor improvement mechanism is first analyzed,and based on this mechanism two stiffness-mass decoupled methods,i.e.,spoke length distribution optimization and lumped mass configuration design,are proposed and demonstrated.A disk resonator gyroscope prototype is fabricated based on these design strategies,and the sensor itself shows an angle random walk as low as 0.001°/√h,demonstrating true potential to achieve navigation-grade *** gyroscope with readout electronics shows an angle random walk of 0.01°/√h and a bias instability of 0.04°/h at room temperature without compensation,revealing that the performance of the gyroscope is severely limited by the readout electronics,which should be further *** expect that the quality factor improvement methods can be used in the design of other MEMS gyroscopes and that the newly designed DRG can be further improved to achieve navigation-grade performances for high-end industrial,transportation,aerospace,and automotive applications.

关键词： resonator constant attractive

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A pinacol boronate caged NIAD-4 derivative as a near-infrared fluorescent probe for fast and selective detection of hypochlorous acid

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Chinese Chemical Letters 2018年第1期29卷 139-142页

作者： Hongjuan Tong Yajun Zhang ShengnanMa Minghao Zhang Na Wang Rui Wang Kaiyan Lou Wei Wang Shanghai Key Laboratory of New Drug Design Shanghai Key Laboratory of Chemical Biology School of Pharmacy State Key Laboratory of Bioengineering Reactor East China University of Science & Technology Shanghai 200237 China Department of Chemistry and Chemical Biology University of New Mexico Albuquerque NM 87131-0001 USA

Hypochlorous acid （HOCI） is one of highly reactive oxygen species （ROS）. It is involved in both immune defense against invading microbes and the progression of many diseases including cardiovascular disease and neurodegeneration disorders. It is generated from hydrogen peroxide （H2O2） and chloride ions in the presence of myeloperoxidase in activated neutrophils. To illustrate HOCI＇s biological functions, fluorescent probes, particularly those fluorescence emissions are in the near-infrared range, are highly needed for in vivo applications. Herein, we reported the design of a pinacol boronate caged near-infrared （NIR） fluorescent probe I derived from an Aft binding fluorophore NIAD-4 for fast and selective detection of HOC1/C10 over other ROS. Upon exposure to HOCI/CIO-, the pinacol boronate caging group of the probe 1 was quickly converted to electron-donating hydroxyl group, which increased intramolecular charge transfer OCT） in the excited state and resulted in the red-shift and intensity enhancement of fluorescence emission. The probe bears several unique features：（1） It could be used as either a ratiomatic or turn-on fluorescent probe; （2） Reaction of the caging group boronate with HOCI is very fast and finishes within seconds, which provides the selectivity over H2O2; （3） The NIAD-4 fluorophore provides additional selectivity for detection of HOCl over peroxynitrite. Moreover, the utility of the probe in imaging HOCllClO- was demonstrated in in vitro phantom imaging studies using mouse brain homogenate as biological relevant media.

关键词： Fluorescent probeHypochlorous acidBoronateReactive oxygen species （ROS）Near-infrared （NIR） imaging

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Erratum to: The formation mechanism of aqueous hydrogen peroxide in a plasma-liquid system with liquid as the anode

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The European Physical Journal D 2020年第7期74卷 1-2页

作者： Lin, Jiao He, Xinyi Chen, Qiang Xiong, Qing Li, Junshuai Wang, Xin Chen, Guolong Liu, Qing Huo Ostrikov, Kostya (Ken) Institute of Electromagnetics and Acoustics Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance Department of Electronic Science Xiamen University Xiamen P.R. China State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing P.R. China Key Laboratory of Special Function Materials & Structure Design of the Ministry of Education School of Physical Science & Technology Lanzhou University Lanzhou P.R. China Department of Electrical and Computer Engineering Duke University Durham USA Institute for Future Environments and School of Chemistry Physics and Mechanical Engineering Queensland University of Technology Brisbane Australia CSIRO-QUT Joint Sustainable Processes and Devices Laboratory Commonwealth Scientific and Industrial Research Organization Lindfield Australia

We find that we made a mistake in the estimation of the H2O2 concentration by the colorimetric method in our previous paper (J. Lin et al., Eur. Phys. J. D (2020) 74: 80) [1].

关键词： Atomic and Molecular Collisions

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Study on optimization design for CSR1000 core

Study on optimization design for CSR1000 core

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作者： Wang, Lianjie Yang, Ping Lu, Di Zhao, Wenbo Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China No. 328 Section 1 Changshun Avenue Shuangliu County Chengdu610213 China

An optimization design of China supercritical water-cooled reactor (SCWR) with the rated electric power of 1000 MWe (CSR1000) conceptual core is proposed. Steady-state performance of the proposed core is then studied with the SCWR core steady-state analysis code system SNTA. These key parameters such as burnup performance, reactivity control capability, power distribution, maximum fuel cladding temperature, and maximum linear power density are analyzed. The relative coolant flow rate of the second flow path, which is suited with assembly power, is also presented. The study shows that the refueling cycle of CSR1000 core can be extended effectively under the optimization design. Copyright © 2018 by ASME.

关键词： Water cooled reactors

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