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Journal of Environmental Sciences 2024年第3期137卷 310-320页

作者： Chunyan Ma Jushuang Pan Cheng Chen Yuanyuan Dong Feng Yao Fengbang Wang Maoyong Song Key Laboratory of Environmental Nano.echno.ogy and Health Effects Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China no.52 institute of china north industries group yantai branch co.Ltd. Yantai 264000China

The rapid deactivation of co.t-effective Mno.(2)-based catalysts in humid air limits their application in practice,and the identification of the role of water in an oxidation process is significant for developing water-resistant Mno.(2)-based ***,CuMno.(2)showed a20.3%HCHO co.version in 10 hr at room temperature in humid air with relative humidity of 40%,but deactivated in 3 hr in dry *** excellent activity and stability of HCHO oxidation in humid air were attributed to the positive effect of H_(2)O on HCHO oxidation to the H_(2)O-HOCH_(2)OH supermolecule assemblies via hydrogen bonds formed on CuMno.(2).H_(2)O-HOCH_(2)OH supermolecule assemblies tend to be oxidized to carbonate,which is further oxidized to co.(2).Furthermore,CuMno.(2)exhibited a much poorer activity of co.oxidation in humid air,but the co.co.version was still 100%in 10 hr in dry air.H_(2)O showed a co.petitive adsorption effect to co.on CuMno.(2).CuMno.(2)co.ld be applied in HCHO elimination in humid air and co.elimination in dry air.

关键词： H_(2)O-HOCH_(2)OH supermolecule HCHO oxidation Humid air CuMno.(2) co.oxidation

Hydrogen embrittlement of a microalloyed bainitic forging steel

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Journal of Iron and Steel Research International 2019年第9期26卷 1011-1021页

作者： Wei-jun Hui Zhan-hua Wang Zhi-bao Xu Yong-jian Zhang Xiao-li Zhao Materials Science and Engineering Research Center School of MechanicalElectronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China yantai branch of china north industries group corporation no. 52 institute co. Ltd.Yantai 264003ShandongChina

The hydrogen embrittlement (HE) of a no.el microalloyed bainitic forging steel with a strength level of 1100 MPa was evaluated using electrochemical charging and slow strain rate tensile test method with no.ched round bar specimens. The results show that the susceptibility to HE of the as-forged bainitic forging steel is no.ably higher than that of the quenched and tempered (Q&T) steel at same strength level, which is ascribed primarily to the presence of a relatively high amount of large blocky martensite/austenite (M/A) co.stituents of the former. It was found that low-temperature tempering treatment at 200 C co.ld significantly alleviate the susceptibility to HE by a relative decrease of * 35% of the as-forged bainitic forging steel at no.expense of strength and ductility, though its resistance to HE is still a little lower than that of the Q&T steel. Thus, it is suggested that efforts co.cerning refining of the large blocky M/A through optimizing chemical co.position and processing route co.ld help to further alleviate the susceptibility to HE of the tested bainitic forging steel.

关键词： Hydrogen embrittlement Bainitic forging steel Microstructure Granular bainite M/A co.stituent

Optimal guidance of extended trajectory shaping

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Chinese Journal of Aeronautics 2014年第5期27卷 1259-1272页

作者： Wang Hui Lin Defu Cheng Zhenxuan Wang Jiang School of Aerospace and Engineering Beijing Institute of Technology china north industries group corporation

To co.trol missile＇s miss distance as well as terminal impact angle, by involving the timeto-go-nth power in the co.t function, an extended optimal guidance law against a co.stant maneuvering target or a stationary target is proposed using the linear quadratic optimal co.trol *** extended trajectory shaping guidance（ETSG） law is then proposed under the assumption that the missile-target relative velocity is co.stant and the line of sight angle is small. For a lag-free ETSG system, closed-form solutions for the missile＇s acceleration co.mand are derived by the method of Schwartz inequality and linear simulations are performed to verify the closed-form results. no.malized adjoint systems for miss distance and terminal impact angle error are presented independently for stationary targets and co.stant maneuvering targets, respectively. Detailed discussions about the terminal misses and impact angle errors induced by terminal impact angle co.straint, initial heading error, seeker zero position errors and target maneuvering, are performed.

关键词： Extended trajectory shaping Impact angle error Miss distance Missile Optimal guidance Terminal co.straint

Physical human-robot interaction estimation based co.trol scheme for a hydraulically actuated exoskeleton designed for power amplification

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Frontiers of Information Techno.ogy & Electronic Engineering 2018年第9期19卷 1076-1085页

作者： Yi LONG Zhi-jiang DU Wei-dong WANG Long HE Xi-wang MAO Wei DONG State Key Laboratory of Robotics and System Harbin Institute of Technolog Zhongshan Torch group co. Ltd Weapon Equipment Research institute China South Industries Group Corporatio

We proposed a lower extremity exoskeleton for power amplification that perceives intended human motion via humanexoskeleton interaction signals measured by biomedical or mechanical sensors, and estimates human gait trajectories to implement co.responding actions quickly and accurately. In this study, torque sensors mounted on the exoskeleton links are proposed for obtaining physical human-robot interaction（pHRI） torque information directly. A Kalman smoother is adopted for eliminating no.se and smoothing the signal data. Simultaneously, the mapping from the pHRI torque to the human gait trajectory is defined. The mapping is derived from the real-time state of the robotic exoskeleton during movement. The walking phase is identified by the threshold approach using ground reaction force. Based on phase identification, the human gait can be estimated by applying the proposed algorithm, and then the gait is regarded as the reference input for the co.troller. A proportional-integral-derivative co.trol strategy is co.structed to drive the robotic exoskeleton to follow the human gait trajectory. Experiments were performed on a human subject who walked on the floor at a natural speed wearing the robotic exoskeleton. Experimental results show the effectiveness of the proposed strategy.

关键词： Exoskeleton Physical human-robot interaction Torque sensor Human gait Kalman smoother

Design and application of wireless signal strength measurement system on the near-ground

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Journal of Measurement Science and Instrumentation 2012年第3期3卷 205-210页

作者：孔祥善师新蕾王代华张志杰 north Automatic co.trol Techno.ogy institute China North Industries Group Corporation Aero-instrument co.Ltd. Aviation Industry Corporation of China Key Laboratory of Instrumentation Science and Dynamic Measurement(north University of china) Ministry of Education

The wireless co.munication system's performance is greatly co.strained by the wireless channel characteristics,especially in some specific ***,signal transmission will be greatly impacted even if no. in a co.plicated *** results show that it is hardly to characterize the radio propagation properties for the antenna installed on the *** order to ensure a successful co.munication,the radio frequency(RF)wireless signal intensity monitor system was *** can get the wireless link transmission loss through measuring signal strength from received *** test shows that the near-ground wireless signal propagation characteristics still can be characterized by the log distance propagation loss *** results will co.duce to studying the transmission characteristic of Near-Earth wireless signals and will predict the co.erage of the earth's surface wireless sensor network.

关键词： near-ground wireless signal transmission received signal strength test radio frequency(RF)wireless channel modeling

Extended State Observer based Attitude co.trol of a Bird-like Flapping-wing Flying Robot

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Journal of Bionic Engineering 2020年第4期17卷 708-717页

作者： Keqiang Bai YunZhi Luo Zhihong Dan Song Zhang Meiling Wang Qiumeng Qian Jun Zhong School of Information Engineering Southwest University of Science and TechnologyRobot Technology Used for Special Environment Key Laboratory of Sichuan ProvinceMianyang 621010China Automation Research institute co. Ltd.of China South Industries Group CorporationMianyang 621000China Science and Techno.ogy on Altitude Simulation Laboratory AECC Sichuan Gas Turbine EstablishmentMianyang 621703China AECC Sichuan Gas Turbine Establishment Mianyang 621703China Chinese Academy of Sciences Hefei institutes of Physical Science Hefei 230022China co.lege of Mechanical and Electrical Engineering Hohai UniversityChangzhou 213022China

The attitude co.trol system of a flapping-wing flying robot plays an important role in the precise orientation and tracking of the *** this paper,the modeling of a bird-like micro flapping-wing system is introduced,and the design of a sliding mode co.troller based on an Extended State Observer(ESO)is *** main design difficulties are the co.trol law and the adaptive law for the attitude co.trol *** address this problem,a sliding mode adaptive extended state observer algorithm is ***,a new extended state approximation method is used to estimate the final output as a disturbance ***,a sliding mode observer with good robustness to the model approximation error and external disturbance is used to estimate the system *** with traditional algorithms,this method is no. only suitable for more general cases,but also effectively reduces the influence of the approximation error and ***,the simulation and experiment example is given to illustrate the implementation *** results show that the algorithm can effectively estimate the state of the attitude co.trol system of the flapping-wing flying robot,and further guarantee the robustness of the model regarding error and external disturbance.

关键词： bionic attitude co.trol flapping-wing flying robot sliding mode adaptive co.trol extended state observer

Effects of dietary lysolecithin(LPC)on growth,apparent digestibility of nutrient and lipid metabolism in juvenile turbot Sco.hthalmus maximus L.

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Aquaculture and Fisheries 2019年第2期4卷 61-66页

作者： Baoshan Li Zheng Li Yongzhi Sun Shixin Wang Bingshan Huang Jiying Wang Shandong Provincial Key Laboratory of Restoration for Marine Eco.ogy Shandong Marine Resource and Environment Research InstituteYantai 264006China Kemin industries (Zhuhai)Co.LtdZhuhai 519040China

An 8-week trial was co.ducted to investigate graded levels of dietary LPC on growth,apparent digestibility(ADs)of nutrients and lipid metabolism in juvenile turbot Sco.hthalmus maximus *** experimental diets were formulated which co.tain 11%crude fat with graded amounts of LPC(0,1000,2500,4000,5500 mg/kg diet).The fish fed diet with 11%crude lipid and 0 LPC was used as the negative co.trol group(C-),meanwhile the fish fed diet with 12%crude fat and 0 LPC was used as the positive co.trol group(C+).Each diet was fed to triplicate groups of turbot(initial body weight of 41 g)for *** gain rate and specific growth rate of the fish fed LPC supplemented diets were significantly higher than the co.trol groups,and the growth performance of the C-group was significantly lower than the *** viscerosomatic index(VSI)was significantly decreased and the gall bladder somatic index(GSI)was significantly increased by dietary *** lipid co.tents of muscle were elevated by dietary *** digestibility of energy was decreased by dietary LPC,but protein and lipid were no. *** total cholesterol(T-CHO)and high density lipoprotein cholesterol(HDL-C)were up-regulated,meanwhile neither alanine amino.ransferase(ALT)no. total protein(TP)were down-regulated by dietary *** involved in lipid metabolism(total lipase,hepatic lipase,lipoprotein lipase,fatty acids synthase,and lipase)were all elevated by dietary *** co.clusion,the lipid requirements of turbot were decreased by dietary LPC and the lipid utilization co.fficient was *** on SAS NLIN regression,dietary 870.37 mg/kg LPC was appropriate for turbot juvenile.

关键词： Turbot Lysolecithin(LPC) Growth performance Lipid metabolism

Optical polarization imaging for underwater target detection with no.-scatter background

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Journal of Measurement Science and Instrumentation 2020年第4期11卷 335-342页

作者： GUAN Jin-ge ZHAO Yong ZHENG Yong-qiu MA Miao SUN Peng XUE Chen-yang School of Information and co.munication Engineering North University of ChinaTaiyuan 030051China Beijing institute of co.puter Application Techno.ogy China North Industries Group Corporation LimitedBeijing 100089China Key Laboratory of Instrumentation Science and Dynamic Measurement(north University of china) Ministry of EducationTaiyuan 030051China Department of Science Taiyuan Institute of TechnologyTaiyuan 030008China

For co.ventional optical polarization imaging of underwater target,the polarization degree of backscatter should be pre-measured by averaging the pixel intensities in the no.target region of the polarization images,and the polarization property of the target is assumed to be co.pletely *** the scattering background is unseen in the field of view or the target is polarized,co.ventional method is helpless in detecting the *** improvement is to use lots of co.polarization and cross polarization detection *** propose a polarization subtraction method to estimate depolarization property of the scattering no.se and target *** experiment in a quartz cuvette co.tainer is performed to demonstrate the effectiveness of the proposed *** results show that the proposed method can work without scattering background reference,and further reco.er the target along with smooth surface for polarization preserving *** study promotes the development of optical polarization imaging systems in underwater environments.

关键词： polarization imaging underwater optical scattering optical information processing target detection

Trajectory Tracking co.trol and Vibration co.trol for a Rigid-Flexible Wing System

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Trajectory Tracking Control and Vibration Control for a Rigi...

Next Decade of Teleco.munications Artificial Intelligence

第40届中国控制会议

作者： Xinyue Tang Tingting Wang Qiang Fu Chunhua Zhang Wei He institute of Artificial Intelligence University of Science and Technology Beijing Key Laboratory of Kno.ledge Automation for Industrial Processes of Ministry of Education School of Automation and Electrical EngineeringUniversity of Science and Technology Beijing Automation Research institute co. Ltd.of China South Industries Group Corporation

This paper mainly proposes co.trol laws to address trajectory tracking and vibration suppression problems for a twolink rigid-flexible wing system. Based on Hamilton’s principle, partial differential equations（PDEs） and ordinary differential equations（ODEs） are proposed to describe the dynamical model of the wing. The boundary co.trollers are designed to restrain the deformations both in bending and twisting, and to achieve the trajectory tracking. We can accurately regulate the motion of the wing to track a desired spatiotemporally varying trajectory with the implement of trajectory tracking co.trol and vibration co.trol. In addition, the stability of this wing system is proven by utilizing Lyapuno.’s direct method. Finally, we can verify that the designed co.trollers are effective acco.ding to the numerical simulations.

关键词： Two-link rigid-flexible wing Trajectory tracking co.trol Vibration co.trol Distributed parameter system

来源： cnki会议评论

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CAAI Artificial Intelligence Research 2022年第1期1卷 28-53页

作者： Ye Ouyang Lilei Wang Aidong Yang Tongqing Gao Leping Wei Yaqin Zhang AsiaInfo Techno.ogies(china)Ltd. Beijing 100193China china Mobile co.munications group co. Ltd.Beijing 100032China china Teleco. group corporation Beijing 100033China institute for AI Industry Research Tsinghua UniversityBeijing 100084China

It has been an exciting journey since the mobile co.munications and artificial intelligence(AI)were co.ceived in 1983 and *** both fields evolved independently and profoundly changed co.munications and co.puting industries,the rapid co.vergence of 5th generation mobile co.munication techno.ogy(5G)and AI is beginning to significantly transform the co.e co.munication infrastructure,network management,and vertical *** paper first outlined the individual roadmaps of mobile co.munications and AI in the early stage,with a co.centration to review the era from 3rd generation mobile co.munication techno.ogy(3G)to 5G when AI and mobile co.munications started to *** regard to teleco.munications AI,the progress of AI in the eco.ystem of mobile co.munications was further introduced in detail,including network infrastructure,network operation and management,business operation and management,intelligent applications towards business supporting system(BSS)&operation supporting system(OSS)co.vergence,verticals and private networks,*** the classifications of AI in teleco.munication eco.ystems were summarized along with its evolution paths specified by various international teleco.munications standardization *** the next decade,the prospective roadmap of teleco.munications AI was *** line with 3rd generation partnership project(3GPP)and International Teleco.munication Union Radioco.munication Sector(ITU-R)timeline of 5G&6th generation mobile co.munication techno.ogy(6G),the network intelligence following 3GPP and open radio access network(O-RAN)routes,experience and intent-based network management and operation,network AI signaling system,intelligent middle-office based BSS,intelligent customer experience management and policy co.trol driven by BSS&OSS co.vergence,evolution from service level agreement(SLA)to experience level agreement(ELA),and intelligent private network for verticals were further *** paper is co

关键词： artificial intelligence(AI) mobile co.munication 5th generation(5G) general purpose techno.ogy(GPT) network intelligence intent-based network network AI signaling system