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Liquid lens based holographic camera for real 3D scene hologram acquisition using end-to-end physical model-driven network

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Light(Science & Applications) 2024年第3期13卷 488-497页

作者： Di Wang Zhao-Song Li Yi Zheng You-Ran Zhao Chao Liu Jin-Bo Xu Yi-wei Zheng Qian Huang Chen-Liang Chang da-wei zhang Song-Lin Zhuang Qiong-Hua Wang School of Instrumentation and Optoelectronic Engineering Beihang UniversityBeijing 100191China School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China

With the development of artificial intelligence,neural network provides unique opportunities for holography,such as high fidelity and dynamic *** to obtain real 3D scene and generate high fidelity hologram in real time is an urgent ***,we propose a liquid lens based holographic camera for real 3D scene hologram acquisition using an end-to-end physical model-driven network(EEPMD-Net).As the core component of the liquid camera,the first 10 mm large aperture electrowetting-based liquid lens is proposed by using specially fabricated *** design of the liquid camera ensures that the multi-layers of the real 3D scene can be obtained quickly and with great imaging *** EEPMD-Net takes the information of real 3D scene as the input,and uses two new structures of encoder and decoder networks to realize low-noise phase *** comparing the intensity information between the reconstructed image after depth fusion and the target scene,the composite loss function is constructed for phase optimization,and the high-fidelity training of hologram with true depth of the 3D scene is realized for the first *** holographic camera achieves the high-fidelity and fast generation of the hologram of the real 3D scene,and the reconstructed experiment proves that the holographic image has the advantage of low *** proposed holographic camera is unique and can be used in 3D display,measurement,encryption and other fields.

关键词： calculation solution holographic

Alternative flexible correction forming of a blade: multipoint correction with surface measurement and deformation simulation

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Advances in Manufacturing 2023年第4期11卷 587-600页

作者： da-wei zhang Wen-Long Gao-zhang Qi zhang Xi’an Key Laboratory of Intelligent Equipment and Control School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an710049People’s Republic of China

Distortion during the forging or machining processes of a blade causes problems in subsequent manufacturing. This paper proposes an alternative multipoint correction method integrated with blade measurement, determination of correcting parameters, and adjustment of the correcting die. An iterative algorithm for determining the correcting parameters is proposed. Measuring equipment combining a laser displacement sensor with multipoint flexible support is manufactured to measure the blade shape. Multipoint correcting equipment with an adaptive lower die and rapid adjustment is manufactured, and software is developed for data analysis and equipment control. The correction experiment for a rough-machined steam-turbine blade indicates that the correcting parameters can be determined after one modification based on numerical simulation, and that a rough blade that meets the allowance for finish machining can be obtained using the determined correction parameters.

关键词： Blade Surface measurement Numerical simulation Multipoint correction

Predictive sliding-mode control of networked high-order fully actuated systems under random deception attacks

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Science China(Information Sciences) 2023年第9期66卷 50-63页

作者： da-wei zhang Guo-Ping LIU Center for Control Theory and Guidance Technology Harbin Institute of Technology Center for Control Science and Technology Southern University of Science and Technology

This research addresses the output tracking of networked high-order fully actuated(NHOFA)systems under random deception attacks in the sensor to networked controller(SNC) and networked controller to actuator(NCA) communication channels, where a Bernoulli process represents the launching success rate of random deception attacks. A successful attack involves the output and control signals being tampered with by the injection of false data. Herein, a predictive sliding-mode control scheme is proposed to achieve the security tracking. In this scheme, a sliding-mode variable is introduced to defend the random deception attacks by enhancing the robustness of closed-loop systems. An incremental HOFA(IHOFA) prediction model is developed using a Diophantine equation as an alternative to the traditional reduced-order prediction model. Through this IHOFA prediction model, the multistep ahead predictions of the sliding-mode variable are constructed to optimize the tracking performance and defense of random deception attacks. By utilizing the Lyapunov function and linear matrix inequality(LMI) approach, a sufficient and necessary condition is proposed to ensure stability and high tracking performance of closed-loop NHOFA systems. Herein, an experiment on the tracking control of an air-bearing spacecraft(ABS) simulator is performed to demonstrate the effectiveness and practicability of the predictive sliding-mode control scheme.

关键词： NHOFA systems random deception attacks predictive sliding-mode control stability and tracking performance tracking control of ABS simulator

Effect of Carboxymethyl Cellulose(CMC) Functionalization on Dispersion, Mechanical, and Corrosion Properties of CNT/Epoxy Nanocomposites

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Chinese Journal of Polymer Science 2023年第8期41卷 1277-1286,I0010页

作者： da-wei zhang Leonard Chia Ying Huang Department of Civil Construction and Environmental EngineeringNorth Dakota State UniversityFargo 58108USA

Carbon nanotube(CNT)/epoxy nanocomposites have a great potential of possessing many advanced ***,the homogenization of CNT dispersion is still a great challenge in the research field of *** study applied a novel dispersion agent,carboxymethyl cellulose(CMC),to functionalize CNTs and improve CNT dispersion in *** effectiveness of the CMC functionalization was compared with mechanical mixing and a commonly used surfactant,sodium dodecylbenzene sulfonate(Na DDBS),regarding dispersion,mechanical and corrosion properties of CNT/epoxy nanocomposites with three different CNT concentrations(0.1%,0.3%and 0.5%).The experimental results of Raman spectroscopy,particle size analysis and transmission electron microscopy showed that CMC functionalized CNTs reduced CNT cluster sizes more efficiently than Na DDBS functionalized and mechanically mixed CNTs,indicating a better CNT *** peak particle size of CMC functionalized CNTs reduced as much as 54%(0.1%CNT concentration)and 16%(0.3%CNT concentration),compared to mechanical mixed and Na DDBS functionalized *** of the better dispersion,it was found by compressive tests that CNT/epoxy nanocomposites with CMC functionalization resulted in 189%and 66%higher compressive strength,224%and 50%higher modulus of elasticity than those with mechanical mixing and Na DDBS functionalization respectively(0.1%CNT cencentration).In addition,electrochemical corrosion tests also showed that CNT/epoxy nanocomposites with CMC functionalization achieved lowest corrosion rate(0.214 mpy),the highest corrosion resistance(201.031Ω·cm^(2)),and the lowest porosity density(0.011%).

关键词： CNT/epoxy composites Carboxymethyl cellulose Dispersion Mechanical properties Corrosion properties

Characteristics of Statically Indeterminate Symmetric Flexure Structures

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Nanomanufacturing and Metrology 2023年第1期6卷 1-14页

作者： Yan-Ding Qin Yue-Yang Shi Bijan Shirinzadeh Yan-Ling Tian da-wei zhang College of Artificial Intelligence Nankai UniversityTianjinChina Department of Mechanical and Aerospace Engineering Monash UniversityMelbourneAustralia School of Mechanical Engineering Tianjin UniversityTianjinChina

Statically indeterminate symmetric(SIS)flexure structures are symmetric structures with“clamped-clamped”boundary *** static indeterminacy and topological symmetry significantly attenuate the parasitic motions associated with statically determinate flexure ***,SIS flexure structures feature decoupled linear and angular motions,improved motion accuracy,high stiffness,and high *** SIS flexure structures have been more frequently utilized as prismatic joints,they can also be utilized as revolute *** study systematically investigates the characteristics of SIS flexure *** on the unified compliance models of a single flexure hinge,analytical compliance models of two fundamental types of SIS flexure structures are *** 1-degree-of-freedom or planar applications,multiple SIS-based structures can also be integrated into various configurations to transmit linear or angular *** stiffness models are also *** characteristics and possible applications of the SIS flexure structures are computationally investigated through case ***,several SIS prototypes are manufactured,and the modeling accuracy of the established stiffness models is experimentally verified.

关键词： Statically indeterminate structure Flexure hinge Compliance modeling Prismatic joint

Flip-over of blood vessel intima caused by vascular closure device:A case report

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World Journal of Clinical Cases 2022年第7期10卷 2247-2252页

作者： Li-Xia Sun Xue-Song Yang da-wei zhang Bo Zhao Lian-Lian Li Qi zhang Qing-Zhi Hao The First Clinical Medical College Shandong University of Traditional Chinese MedicineJinan 250000Shandong ProvinceChina Department of Peripheral Vascular Diseases the Affiliated Hospital of Shandong University of Traditional Chinese MedicineJinan 250000Shandong ProvinceChina

BACKGROUND Complications of vascular closure devices mainly include bleeding,vascular injury,and trapped device that cannot be removed ***,arterial stenosis or occlusion induced by vascular injury is *** article introduces a rare case with severe acute limb ischemia after using the vascular closure device(StarClose).CASE SUMMARY A 54-year-old man was admitted because of necrosis of the second toe of the left foot for 2 *** showed left femoral artery stenosis,and occlusion of the left popliteal,posterior tibial,peroneal,anterior tibial and dorsalis pedis arteries,suggesting arteriosclerosis obliterans of low extremities,gangrene and type 2 *** underwent an interventional procedure of drug-eluting balloon in the left lower limb via antegrade puncture of the left common femoral *** developed acute limb ischemia after 1 h,and severe pain,numbness,pale skin,low skin temperature and weakened sensation in the left *** of the common femoral artery intima was *** surgery showed occlusion at the puncture point accompanied with bulged vascular lumen and flipped vascular intima caused by *** flipped intima was *** limb blood supply was restored and the limb was saved *** recovered well at final *** Incorrect use of the vascular closure device was the main cause of severe acute limb ischemia in this case.

关键词： StarClose vascular closure device Vascular injury Complications Case report

The mitophagy pathway and its implications in human diseases

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Signal Transduction and Targeted Therapy 2023年第9期8卷 4015-4042页

作者： Shouliang Wang Haijiao Long Lianjie Hou Baorong Feng Zihong Ma Ying Wu Yu Zeng Jiahao Cai da-wei zhang Guojun Zhao The Sixth Affiliated Hospital of Guangzhou Medical University Qingyuan City People’s HospitalQingyuanGuangdongChina Xiangya Hospital Central South UniversityChangshaHunanChina Group on the Molecular and Cell Biology of Lipids and Department of Pediatrics Faculty of Medicine and DentistryUniversity of AlbertaEdmontonAlbertaCanada

Mitochondria are dynamic organelles with multiple *** participate in necrotic cell death and programmed apoptotic,and are crucial for cell metabolism and *** serves as a cytoprotective mechanism to remove superfluous or dysfunctional mitochondria and maintain mitochondrial fine-tuning numbers to balance intracellular *** evidences show that mitophagy,as an acute tissue stress response,plays an important role in maintaining the health of the mitochondrial *** the timely removal of abnormal mitochondria is essential for cell survival,cells have evolved a variety of mitophagy pathways to ensure that mitophagy can be activated in time under various environments.A better understanding of the mechanism of mitophagy in various diseases is crucial for the treatment of diseases and therapeutic target *** this review,we summarize the molecular mechanisms of mitophagy-mediated mitochondrial elimination,how mitophagy maintains mitochondrial homeostasis at the system levels and organ,and what alterations in mitophagy are related to the development of diseases,including neurological,cardiovascular,pulmonary,hepatic,renal disease,etc.,in recent ***,we summarize the potential clinical applications and outline the conditions for mitophagy regulators to enter clinical *** advances in signaling transduction of mitophagy will have an important role in developing new therapeutic strategies for precision medicine.

关键词： diseases homeostasis metabolism

CO_(2) corrosion of X80 steel welded joints under micro-turbulence induced by welding reinforcement height

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Journal of Iron and Steel Research(International) 2024年第4期31卷 1015-1032页

作者： Xiao-hui Dou Bin Li Zong-hao He Xin-wei zhang da-lei zhang Yan Li School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

Corrosion failure accidents owing to flow erosion and pipeline corrosion frequently occur during *** welding reinforcement height(WRH)can induce locally micro-turbulent flow field,which aggravates local corrosion of welded joints.A high wall shear stress(WsS)experimental setup was established to conduct the online electrochemical corrosion *** influence of WRH sizes on local corrosion of welded joints was studied at different flow *** electrochemical signals of the local corrosion of X80 welded joints at different flow rates were monitored in real time using electrochemical impedance spectroscopy and wire beam *** addition,the corrosion products composition and properties were *** results show that the micro-turbulent flow fields induced by the WRHs can enhance ion mass transfer near the welded *** corrosion products on the WRH surface also present different microscopic morphologies at different flow *** strong flow fields,the locally enhanced wsS can peel off the dense corrosion product partially,leading to the electrochemical distribution of large cathode and small anode,which accelerates the occurrence and development processes of the local corrosion of welded *** scientific guidelines for the corrosion protection of long-distance oil and gas pipelines can be potentially provided.

关键词： X80 steel welded joint Welding reinforcement height Micro-turbulence CO_(2)corrosion-Ion mass transfer

Therapeutic utility of human umbilical cord-derived mesenchymal stem cells-based approaches in pulmonary diseases:Recent advancements and prospects

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World Journal of Stem Cells 2024年第2期16卷 70-88页

作者： Min Meng wei-wei zhang Shuang-Feng Chen da-Rui Wang Chang-Hui Zhou Department of Central Laboratory Liaocheng People’s HospitalLiaocheng 252000Shandong ProvinceChina Department of Clinical Laboratory Liaocheng People’s HospitalLiaocheng 252000Shandong ProvinceChina

Pulmonary diseases across all ages threaten millions of people and have emerged as one of the major public health issues *** diverse disease con-ditions,the currently available approaches are focused on alleviating clinical symptoms and delaying disease progression but have not shown significant therapeutic effects in patients with lung *** umbilical cord-derived mesenchymal stem cells(UC-MSCs)isolated from the human UC have the capacity for self-renewal and multilineage ***,in recent years,these cells have been demonstrated to have unique advantages in the treatment of lung *** searched the Public Clinical Trial database and found 55 clinical trials involving UC-MSC therapy for pulmonary diseases,including coronavirus disease 2019,acute respiratory distress syndrome,bron-chopulmonary dysplasia,chronic obstructive pulmonary disease,and pulmonary *** this review,we summarize the characteristics of these registered clinical trials and relevant published results and explore in depth the challenges and opportunitiesfaced in clinical ***,the underlying mole-cular mechanisms involved in UC-MSC-based therapy for pulmonary diseases are also analyzed in *** brief,this comprehensive review and detailed analysis of these clinical trials can be expected to provide a scientific reference for future large-scale clinical application.

关键词： Pulmonary diseases Mesenchymal stem cells Human umbilical cord Cell therapy Clinical trials