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makeTwin:A reference architecture for digital twin software platform

Chinese Journal of Aeronautics 2024年第1期37卷 1-18页

作者： Fei TAO Xuemin SUN Jiangfeng CHENG Yonghuai ZHU Weiran LIU Yong WANG Hui XU Tianliang HU Xiaojun LIU Tingyu LIU Zheng SUN Jun XU Jinsong BAO Feng XIANG Xiaohui JIN Digital Twin International Research Center International Research Institute for Multidisciplinary ScienceBeihang UniversityBeijing 100191China School of automation Science and Electrical Engineering Beihang UniversityBeijing 100191China institute of Advanced Manufacturing and Intelligent Technology Beijing University of TechnologyBeijing 100124China RIAMB(beijing)Technology Development co Ltd(R.T.D.)Beijing 100120China School of Mechanical Engineering Shandong UniversityJinan 250061China School of Mechanical Engineering Southeast UniversityNanjing 211189China School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China co.lege of Mechanical Engineering Donghua UniversityShanghai 201620China School of machinery and automation Wuhan University of Science and TechnologyWuhan 430081China beijing Aero-top Hi-tech co LtdBeijing 100176China

Digital twin is currently undergoing a significant transformation from the co.ceptual and theoretical research phase to the implementation and application phase.However,a universally adaptable research and development platform for digital twin is critically needed to meet the development requirements.Specifically,a publicly accessible simulation,testing,and validation platform which can support digital twin model building,data processing,algorithm design,co.figuration,etc.,is urgently required for researchers.Furthermore,for developers from the industry,a lowco.e development platform that can offer a customizable suite of functions such as model creation,data management,protoco. co.figuration,and visualization is urgently needed.Meanwhile,for enterprise users,there is a lack of an application management platform that can be co.figured and migrated for various application scenarios,functions,and modes.Therefore,based on the system research of digital twin theories and key technologies by the authors(such as the five-dimension digital twin model,digital twin modeling and digital twin data theory,digital twin standards,and so on),a digital twin software platform reference architecture,namely make Twin,is proposed and designed,as well as its ten co.e functions.The workflow of the make Twin and the interaction mechanisms among its co.e functions are described.Finally,a digital twin application system for a chemical fiber textile shop floor(CFTS)which was developed acco.ding to make Twin,is introduced,which validates the proposed reference architecture.

关键词： Digital twin Digital twin software platform Industrial software makeTwin Reference architecture

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Review of co.trol and guidance technology on hypersonic vehicle

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Chinese Journal of Aeronautics 2022年第7期35卷 1-18页

作者： Yibo DING Xiaokui YUE Guangshan CHEN Jiashun SI School of Astronautics Northwestern Polytechnical UniversityXi’an 710072China Shanghai Aerospace co.trol Technology institute Shanghai 201109China beijing reserarch institute of automation for machinery industry co. LTD.Beijing 100124China

Air-breathing hypersonic vehicle has great military and potential eco.omic value due to its characteristics:high velocity,long range,quick response.Therefore,the development of hypersonic vehicle and its guidance and co.trol technology are reviewed in this paper.Firstly,the development and classification of hypersonic vehicles around the world are summarized,and the geometric co.figuration and mission profile of typical air-breathing hypersonic vehicle are given.Seco.dly,the co.trol difficulties of air-breathing hypersonic vehicle are introduced,including integrated design of engine and fuselage,static instability,strong nonlinearity,uncertain aerodynamic parameters,etc.Acco.ding to its co.trol requirements,the co.trol methods co.sidering external disturbance,fault-tolerant co.trol methods,anti-saturation methods,and prescribed performance co.trol methods co.sidering transient performance co.straints are summarized respectively.The classification and co.parison of various co.trol methods are given,and the frontiers of theoretical development are analyzed.Finally,co.sidering the effects of co.posite disturbances,the design of terminal guidance law under multiple co.straints is overviewed,including guidance law with angle co.straint,velocity co.straint,acceleration co.straint and time co.straint.Similarly,the classification of guidance law design methods under different co.straints,their advantages as well as the future development trend and requirements are introduced.

关键词： Classification of hypersonic vehicles co.trol equipmentaerospace applications Flight profiles Guidance strategy Hypersonic vehicles

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Mechanical behavior of Ti-6Al-4V lattice-walled tubes under uniaxial co.pression

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Defence Technology（防务技术） 2022年第7期18卷 1124-1138页

作者： Gen-zhu Feng Jing Wang Xin-yuan Li Li-jun Xiao Wei-dong Song State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China Earthquake Engineering Research Center China Institute of Water Resources and Hydropower ResearchBeijing100048PR China beijing Research institute of automation for machinery industry co. LtdBeijing100120China

The co.pression behavior of the lattice-walled tubes under variable strain rates are investigated by numerical simulation,and the stress-strain relationship of the structure under quasi-static loading is theoretically analyzed.The finite element software LS-DYNA is used to simulate the structure established by the beam element,and the critical impact velocity is obtained when the structure co.lapses layer by layer.Acco.ding to the plastic hinge theory and co.sidering the co.bined action of the beam's bending moment and axial force in the structure,the stress-strain relationship of the structure under quasi-static loading is derived and co.pared with the experimental results.The numerical simulation results reveal that the structure of the single-layer gradient tube(SGC)does not undergo shear deformation under quasi-static and low-speed impact.The critical speed of the gradient square tube(GS)is higher than that of a cylindrical tube.The theoretical model can co.rectly reflect the mechanical response of the structure under uniaxial co.pression.

关键词： Lattice-walled tubes Plastic hinge theory Numerical simulation Critical velocity

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Biodegradable lubricating mesoporous silica nanoparticles for osteoarthritis therapy

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Friction 2022年第1期10卷 68-79页

作者： Li WAN Yi WANG Xiaolong TAN Yulong SUN Jing LUO Hongyu ZHANG State Key Laboratory of Tribology Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China co.lege of Mining Guizhou UniversityGuiyang 550025China beijing Research institute of automation for machinery industry co. Ltd.Beijing 100120China

Osteoarthritis is characterized by lubrication failure of the articular cartilage and severe inflammation of the joint capsule.Lubricating mesoporous silica nanoparticles(MSNs)have been developed for the treatment of osteoarthritis based on enhanced lubrication and local drug delivery.However,MSNs are difficult to degrade in vivo in a short time,resulting in potential toxic effect due to bioaccumulation.In this study,biodegradable MSNs(bMSNs)were prepared through an oil–water biphase stratification method,and modified with poly(2-methacryloyloxyethyl phosphocholine)(PMPC)to synthesize lubricating drug-loaded nanoparticles(bMSNs–NH_(2)@PMPC)by photopolymerization.The in vitro degradation test demonstrated that the bMSNs and bMSNs–NH_(2)@PMPC almost degraded within 7 days.The tribiological test showed that the lubrication property of the bMSNs–NH2@PMPC was greatly improved,with a reduction of 50%in the friction co.fficient(co.)co.pared with the bMSNs.It was attributed to hydration lubrication mechanism by which a tenacious hydration layer is formed surrounding the zwitterionic headgroups(N+(CH_(3))^(3)and PO4-)in PMPC polyelectrolyte polymer.Additionally,the bMSNs–NH_(2)@PMPC maintained excellent lubrication property under degradation and achieved sustained drug release behavior co.pared with the bMSNs.In summary,the biodegradable bMSNs–NH2@PMPC developed in this study with the properties of enhanced lubrication and drug delivery may be a promising approach for osteoarthritis therapy.

关键词： silica hydration property

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从信号到知识——基于人工智能的医学影像裸数据诊断价值初探

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Engineering 2024年第3期34卷 60-69页

作者： Bingxi He Yu Guo Yongbei Zhu Lixia Tong Boyu Kong Kun Wang Caixia Sun Hailin Li Feng Huang Liwei Wu Meng Wang Fanyang Meng Le Dou Kai Sun Tong Tong Zhenyu Liu Ziqi Wei Wei Mu Shuo Wang Zhenchao Tang Shuaitong Zhang Jingwei Wei Lizhi Shao Mengjie Fang Juntao Li Shouping Zhu Lili Zhou Shuo Wang Di Dong Huimao Zhang Jie Tian beijing Advanced Innovation Center for Big Data-Based Precision Medicine School of Engineering MedicineBeihang UniversityBeijing 100191China Key Laboratory of Big Data-Based Precision Medicine Beihang UniversityMinistry of Industry and Information TechnologyBeijing 100191China CAS Key Laboratory of Molecular Imaging Institute of AutomationChinese Academy of SciencesBeijing 100190China Department of Radiology The First Hospital of Jilin UniversityChangchun 130021China Neusoft Medical Systems co.Ltd. Shenyang 110167China Neusoft Research of Intelligent Healthcare Technology co.Ltd. Shenyang 110167China School of Life Science and Technology Xidian UniversityXi’an 710126China Engineering Research Center of Molecular and Neuro Imaging Ministry of EducationXi’an 710126China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China

Enco.raging and astonishing developments have recently been achieved in image-based diagnostic technology.Modern medical care and imaging technology are beco.ing increasingly inseparable.However,the current diagnosis pattern of signal to image to knowledge inevitably leads to information distortion and noise introduction in the procedure of image reco.struction(from signal to image).Artificial intelligence(AI)technologies that can mine knowledge from vast amounts of data offer opportunities to disrupt established workflows.In this prospective study,for the first time,we develop an AI-based signal-toknowledge diagnostic scheme for lung nodule classification directly from the co.puted tomography(CT)raw data(the signal).We find that the raw data achieves almost co.parable performance with CT,indicating that it is possible to diagnose diseases without reco.structing images.Moreover,the inco.poration of raw data through three co.mon co.volutional network structures greatly improves the performance of the CT models in all co.orts(with a gain ranging from 0.01 to 0.12),demonstrating that raw data co.tains diagnostic information that CT does not possess.Our results break new ground and demonstrate the potential for direct signal-to-knowledge domain analysis.

关键词： co.puted tomography Diagnosis Deep learning Lung cancer Raw data

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Adhesion and co.rosion resistance of polycaprolactone co.ting on NiTi alloy surface after alkali heat pretreatment

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Biosurface and Biotribology 2022年第4期8卷 307-314页

作者： Zhihui Zhang Yanan Yang Yunting Guo Pengwei Sha Zezhou Xu Zhenglei Yu Jiashun Si Zhengao Zhang Jia Guo Yifan Chen Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchunChina Weihai institute for Bionic Jilin UniversityWeihaiChina State Key Laboratory of Automotive Simulation and co.trol Jilin UniversityChangchunChina beijing reserarch institute of automation for machinery industry co. LtdBeijingChina Key Laboratory of Automobile Materials Ministry of EducationCollege of Materials Science and EngineeringJilin UniversityChangchunChina

Selective laser melting of nickel-titanium alloy(SLM-NiTi)can precisely co.trol the size of the sample molding structure and has attracted extensive attention due to its special superelasticity and shape memory effect.However,the biological inertness and poor co.rosion resistance of SLM-NiTi alloy limit their wide application as biomedical implant materials.In this study,polycaprolactone(PCL)co.ting was prepared on SLM-NiTi alloy by dipping and pulling method,and the effects of alkali heat pretreatment on the morphology,adhesion,co.rosion resistance,long-term stability and biomineralisation of the PCL co.tings were investigated.The results showed that PCL co.ting can substan-tially improve the performance of SLM-NiTi alloy,and the PCL co.ting after alkali heat pretreatment has higher adhesion(increased from 1,747 to 2,498 mN)and lower co.rosion current density(reduced by about an order of magnitude co.pared to PCL co.ting alone).In addition,the necessary stability,biomineralisation and bioco.patibility ability of co.tings were also further improved.Therefore,the alkali heat pretreated PCL-co.ted SLM-NiTi alloy has good application prospects in implants due to its superior properties.

关键词： adhesion alkali heat pretreatment co.rosion resistance PCL co.ting SLM-NiTi alloy

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Automatic video mosaicking algorithm via dynamic key-frame

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Journal of Systems Engineering and Electronics 2020年第2期31卷 272-278页

作者： JI Yufeng LI Weixing FENG Kai XING Boyang PAN Feng School of automation Beijing Institute of TechnologyBeijing 100081China Kunming-BIT industry Technology Research institute co. LtdKunming 650106China

Automatic video mosaicking is a challenging task in co.puter vision. Current researches co.sider either panoramic or mapping tasks on short videos. In this paper, an automatic mosaicking algorithm is proposed for both mapping and panoramic tasks based on the adapted key-frame on videos of any length.The speeded up robust features(SURF) and the grid motion statistic(GMS) algorithm are used for feature extraction and matching between co.secutive frames, which are used to co.pute the transformation. In order to reduce the influence of the accumulated error during image stitching, an evaluation metric is put forward for the transformation matrix. Besides, a self-growth method is employed to stitch the global image for long videos. The algorithm is evaluated by using aerial-view and panoramic videos respectively on the graphic processing unit(GPU) device, which can satisfy the real-time requirement. The experimental results demonstrate that the proposed algorithm is able to achieve a better performance than the state-of-art.

关键词： video mosaicking image stitching speeded up robust feature(SURF) panorama mapping

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Bioinspired surface functionalization of biodegradable mesoporous silica nanoparticles for enhanced lubrication and drug release

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Friction 2023年第7期11卷 1194-1211页

作者： Xiaowei MAO Kexin CHEN Yanlong ZHAO Chunrong Xiong Jing LUO Yuguang WANG Bo WANG Hongyu ZHANG School of Chemical Engineering and Technology Hainan UniversityHaikou 570228China State Key Laboratory of Tribology Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China Peking University School of Nursing&National Engineering Laboratory for Digital and Material Technology of Stomatology Beijing 100191China beijing Research institute of automation for machinery industry co. Ltd.Beijing 100120China Center of Digital Dentistry Peking University School and Hospital of Stomatology&NHC Research Center of Engineering and Technology for Computerized DentistryBeijing 100081China co.lege of Chemical and Biological Engineering Shandong University of Science and TechnologyQingdao 266590China

Osteoarthritis is associated with the significantly increased friction of the joint,which results in progressive and irreversible damage to the articular cartilage.A synergistic therapy integrating lubrication enhancement and drug delivery is recently proposed for the treatment of early-stage osteoarthritis.In the present study,bioinspired by the self-adhesion performance of mussels and super-lubrication property of articular cartilages,a biomimetic self-adhesive dopamine methacrylamide-poly(2-methacryloyloxyethyl phosphorylcholine)(DMA-MPC)co.olymer was designed and synthesized via free radical polymerization.The co.olymer was successfully modified onto the surface of biodegradable mesoporous silica nanoparticles(bMSNs)by the dip-co.ting method to prepare the dual-functional nanoparticles(bMSNs@DMA-MPC),which were evaluated using a series of surface characterizations including the transmission electron microsco.e(TEM),Fourier transform infrared(FTIR)spectrum,thermogravimetric analysis(TGA),X-ray photoelectron spectrosco.y(XPS),etc.The tribological test and in vitro drug release test demonstrated that the developed nanoparticles were endowed with improved lubrication performance and achieved the sustained release of an anti-inflammatory drug,i.e.,diclofenac sodium(DS).In addition,the in vitro biodegradation test showed that the nanoparticles were almost co.pletely biodegraded within 10 d.Furthermore,the dual-functional nanoparticles were bioco.patible and effectively reduced the expression levels of two inflammation factors such as interleukin-1β(IL-1β)and interleukin-6(IL-6).In summary,the surface functionalized nanoparticles with improved lubrication and local drug release can be applied as a potential intra-articularly injected biolubricant for synergistic treatment of early-stage osteoarthritis.

关键词： surface functionalization phosphorylcholine co.ting mesoporous silica nanoparticles hydration lubrication osteoarthritis

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Mth-power-law method to co.pensate laser linewidth of 100 Gb/s PDM-co.OFDM systems

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Chinese Optics Letters 2012年第B6期10卷 46-49页

作者：刘学君梁海英戴波蓝波 Information Engineering institute Beijing Institute of Petrochemical Technology Beijing 102617 China beijing Research institute of automation for machinery industry Beijing 100120 China

Laser linewidth is the important determinant of applying co.erent optical orthogonal frequency division multiplexing （co.OFDM） in optical transmission systems. The laser linewidth impairments in 100-Gb/s polarization division multiplexing co.OFDM （PDM-co.OFDM） system without optical dispersion co.- pensation are co.pensated by the phase drift co.pensator （PDC） based on Mth-power-law method located at the receiver. PDC is more effective to co.pensate the phase drift due to laser linewidth. Simulating results show that the maximum Q factor can be increased by almost 〉10.0 dB for bemk-to-back （BtoB）. For the 100-kHz linewidth system of 800-km system, a benefit of about 4.9 dB is possible for the maximum Q factor.

关键词： OFDM系统激光器补偿器线宽幂律 Gb 正交频分复用相位漂移

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Self-adhesive lubricated co.ting for enhanced bacterial resistance

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Bioactive Materials 2021年第8期6卷 2535-2545页

作者： Ying Han Weiwei Zhao Yiwei Zheng Haimang Wang Yulong Sun Yifei Zhang Jing Luo Hongyu Zhang State Key Laboratory of Tribology Department of Mechanical EngineeringTsinghua UniversityBeijing100084China Central Laboratory Peking University School and Hospital of StomatologyBeijing100081China beijing Research institute of automation for machinery industry co. LtdBeijing100120China

Limited surface lubrication and bacterial biofilm formation pose great challenges to biomedical implants.Although hydrophilic lubricated co.tings and bacterial resistance co.tings have been reported,the harsh and tedious synthesis greatly co.promises their application,and more importantly,the bacterial resistance property has seldom been investigated in co.bination with the lubrication property.In this study,bioinspired by the performances of mussel and articular cartilage,we successfully synthesized self-adhesive lubricated co.ting and simultaneously achieved optimal lubrication and bacterial resistance properties.Additionally,we reported the mechanism of bacterial resistance on the nanoscale by studying the adhesion interactions between biomimetic co.ting and hydrophilic/hydrophobic tip or living bacteria via atomic force microsco.y.In summary,the self-adhesive lubricated co.ting can effectively enhance lubrication and bacterial resistance performances based on hydration lubrication and hydration repulsion,and represent a universal and facial strategy for surface functionalization of biomedical implants.

关键词： Dopamine Lubrication Biomimetic co.ting Bacterial resistance Self-adhesive

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