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A novel triple periodic minimal surface-like plate lattice and its data-driven optimization method for superior mechanical properties

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Applied Mathematics and Mechanics(English Edition) 2024年第2期45卷 217-238页

作者： Yanda wang Yanping LIAN zhidong wang Chunpeng wang Daining FANG State Key Laboratory for Turbulence and Complex Systems&Center for Applied Physics and Technology College of EngineeringPeking UniversityBeijing 100871China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China

Lattice structures can be designed to achieve unique mechanical properties and have attracted increasing attention for applications in high-end industrial equipment,along with the advances in additive manufacturing(AM)*** this work,a novel design of plate lattice structures described by a parametric model is proposed to enrich the design space of plate lattice structures with high connectivity suitable for AM *** parametric model takes the basic unit of the triple periodic minimal surface(TPMS)lattice as a skeleton and adopts a set of generation parameters to determine the plate lattice structure with different topologies,which takes the advantages of both plate lattices for superior specific mechanical properties and TPMS lattices for high connectivity,and therefore is referred to as a TPMS-like plate lattice(TLPL).Furthermore,a data-driven shape optimization method is proposed to optimize the TLPL structure for maximum mechanical properties with or without the isotropic *** this method,the genetic algorithm for the optimization is utilized for global search capability,and an artificial neural network(ANN)model for individual fitness estimation is integrated for high efficiency.A set of optimized TLPLs at different relative densities are experimentally validated by the selective laser melting(SLM)fabricated *** is confirmed that the optimized TLPLs could achieve elastic isotropy and have superior stiffness over other isotropic lattice structures.

关键词： lattice structure triple periodic minimal surface(TPMS) plate lattice structural optimization machine learning

Structurally coupled characteristics of rotor blade geometrically exact formulation

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Chinese Journal of Aeronautics 2022年第6期35卷 186-197页

作者： Jie WU Yijiang MA zhidong wang Zhihao YU School of Naval Architecture & Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China College of Aerospace Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

In rotor dynamics,blades are normally modelled as a slender beam,in which elastic deformations are coupled with each *** identify these coupling effects,new rigid-flexible structural model for helicopter rotor system is proposed in this *** rotations of the whole blade(on flapwise,lagwise,and torsional)are described as three global rigid degrees of *** nonlinear deformation geometrics of the beam is built on geometrically exact beam *** expressions for blade strain energy,kinetic energy,and virtual work of various kinds of external forces are derived as functions of finite rotations and elastic *** quantify the coupling characteristics,following the definition of coupling factor in electromagnetics,a new coupling factor between two modal components on each mode is introduced in modal *** show that the new structural model is highly capable of solving static and dynamic problems in rotor system and the maximum deformation that moderate deformation beam theory can predict might be 15%of beam *** the new coupling factor is applied to study structurally coupled characteristics of rotor blade,it can be concluded that closeness of natural frequencies likely indicates considerable coupling between corresponding DOFs in structure.

关键词： Computational geometry Flexible couplings Helicopter rotors Modal analysis Structural dynamics

Network-Constrained Energy Consumption Game for Dynamic Pricing Markets

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CSEE Journal of Power and Energy Systems 2022年第2期8卷 548-558页

作者： Yifei wang Xiuli wang Yi Kuang Qiao Peng Hongyang Zhao zhidong wang the Shannxi Key Laboratory of Smart Grid School of Electrical EngineeringXi’an Jiaotong UniversityXi’an 710049China the State Grid Economic and Technological Research Institute Co. Ltd.Beijing 102209China

The electricity distribution network is experiencing a profound transformation with the concept of the smart grid,providing possibilities for selfish consumers to interact with the distribution system operator(DSO)and to maximize their individual energy consumption ***,this profitseeking behavior among consumers may violate the network constraints,such as line flows,transformer capacity and bus voltage magnitude ***,a network-constrained energy consumption(NCEC)game among active load aggregators(ALAs)is proposed to guarantee the safety of the distribution *** temporal and spatial constraints of an ALA are both considered,which leads the formulated model to a generalized Nash equilibrium problem(GNEP).By resorting to a well-developed variational inequality(VI)theory,we study the existence of solutions to the NCEC game ***,a two-level distributed algorithm is proposed to find the variational equilibrium(VE),a fair and stable solution to the formulated game ***,the effectiveness of the proposed game model and the efficiency of the distributed algorithm are tested on an IEEE-33 bus system.

关键词： Electricity distribution network generalized Nash equilibrium problem network-constrained energy consumption game two-level distributed algorithm variational equilibrium

A Robotic System with Robust Remote Center of Motion Constraint for Endometrial Regeneration Surgery

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Chinese Journal of Mechanical Engineering 2022年第4期35卷 169-181页

作者： Jianhua Li Chongyang wang Zhenxing wang Xiong Zheng zhidong wang Jichun Tan Hao Liu State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110169China University of Chinese Academy of Sciences Beijing 100049China Shenyang Jianzhu University Shenyang 110168China Chiba Institute of Technology Chiba 275-0016Japan Shengjing Hospital of China Medical University Shenyang 110016China

Surgical robots have been widely used in diferent procedures to improve and facilitate the ***,there is no robot designed for endometrial regeneration surgery,which is a new therapy for restoring fertility in women using stem *** regeneration surgery requires processing of the endometrium and transplantation of stem cells with minimal trauma to the *** this paper,we introduce a surgical robotic system that consists of a dexterous hysteroscope,supporting arm,and additional novel instruments to facilitate the operation and decrease trauma to the *** center of motion(RCM)constraint is required to protect the cervix of the ***,the supporting arm and hysteroscope are controlled separately in kinematics to ensure that the RCM constraint and hysteroscope’s shape and posture are ***,a task-decoupled method is used to improve the robustness of the RCM *** confrm that the proposed method is more robust and achieves higher RCM *** addition,the master-slave control of a robot with RCM constraint is also *** study proposes the realization of a robot with robust RCM control for endometrial regeneration surgery.

关键词： Endometrial regeneration Surgical robot Remote center of motion Task decoupled

The terrestrial isopod,Cylisticus convexus(de Geer,1778),representing a new record family in China(Oniscidea)

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Zoological Systematics 2022年第2期47卷 168-174页

作者： zhidong wang Chao Jiang Luqi Huang College of Pharmaceutical Science Zhejiang Chinese Medical UniversityHangzhou 310053China State Key Laboratory Breeding Base of Dao-di Herbs National Resource Center for Chinese Materia MedicaChina Academy of Chinese Medical SciencesBeijing 100700China

Among the 11 suborders of Isopoda,Oniscidea is the only one that is completely adapted to land *** is widely distributed in the world,with 38 families and 3,814 species(WoRMS,2021).Thirteen accepted families and one incertae sedis genus of the suborder Oniscidea have been reported from China,namely Agnaridae Schmidt,2003,Alloniscidae Schmidt,2003,Armadillidae Brandt,1831,Armadillidiidae Brandt,1833,Detonidae Budde-Lund,1904,Halophilosciidae Verhoeff,1908,Ligiidae Leach,1814,Philosciidae Kinahan,1857,Platyarthridae Verhoeff,1949,Porcellionidae Brandt,1831,Styloniscidae Vandel,1952,Trachelipodidae Strouhal,1953,Tylidae Dana,1852 and Exalloniscus Stebbing,1911(Chen,2003;Schmalfuss,2003a;WoRMS,2021).

关键词： record Iso representing

Fabrication of Waterproof Artificial Compound Eyes with Variable Field of View Based on the Bioinspiration from Natural Hierarchical Micro–Nanostructures

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Nano-Micro Letters 2020年第12期12卷 13-28页

作者： Peilin Zhou Haibo Yu Ya Zhong Wuhao Zou zhidong wang Lianqing Liu State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016People’s Republic of China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110169People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China Department of Advanced Robotics Chiba Institute of TechnologyChiba 275‑0016Japan

Planar and curved microlens arrays(MLAs)are the key components of miniaturized microoptical *** order to meet the requirements for advanced and multipurpose applications in microoptical field,a simple manufacturing method is urgently required for fabricating MLAs with unique properties,such as waterproofness and variable field-of-view(FOV)*** properties are beneficial for the production of advanced artificial compound eyes for the significant applications in complex microcavity environments with high humidity,for instance,miniature medical ***,the simple and effective fabrication of advanced artificial compound eyes still presents significant *** this paper,bioinspired by the natural superhydrophobic surface of lotus leaf,we propose a novel method for the fabrication of waterproof artificial compound *** jet printing was used to fabricate hierarchical MLAs and nanolens arrays(NLAs)on polydimethylsiloxane *** flexible film of MLAs hybridized with NLAs exhibited excellent superhydrophobic property with a water contact angle of 158°.The MLAs film was deformed using a microfluidics chip to create artificial compound eyes with variable FOV,which ranged from 0°to 160°.

关键词： Bioinspired Hierarchical MLAs and NLAs Waterproof artificial compound eyes E-jet printing Microfluidics chip

Sodium humate accelerates cutaneous wound healing by activating TGF-β/Smads signaling pathway in rats

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Acta Pharmaceutica Sinica B 2016年第2期6卷 132-140页

作者： Yuanyuan Ji Aijun Zhang Xiaobin Chen Xiaoxia Che Kai Zhou zhidong wang Scientific Research Center the Second Affiliated Hospital of Xi'an Jiaotong University Department of Pharmacy the Second Affiliated Hospital of Xi'an Jiaotong University Department of VIP General Surgery the Second Affiliated Hospital of Xi'an Jiaotong University

Sodium humate(HA-Na) has been topically used as a wound healing and anti-inflammatory agent in folk medicine. In the present study, HA-Na was investigated for cutaneous wound healing in Sprague–Dawley rats. HA-Na solution(1.0%, w/v) was topically administered to rats undergoing excision wound models. Healing was assessed with a recombinant bovine basic fibroblast growth factor for external use as positive control. Wound healing rates were calculated on Day 3, 6, 9, 14 and 21 after injury, and tissues were also harvested after the same intervals for histological analysis. In addition, tissue hydroxyproline levels were measured. Furthermore, m RNA levels and protein expressions of transforming growth factor-β1, 2, 3(TGF-β1, 2, 3) were determined by RT-PCR and western blot. Protein expression levels of Smad-2,-3,-4 and-7 were also detected by western blot. Our study demonstrates that HA-Na has the capacity to promote wound healing in rats via accelerated wound contraction and increased hydroxyproline content. More importantly, these wound healing effects of HA-Na might be mediated through the TGF-β/Smad signaling pathway. HA-Na may be an effective agent for enhanced wound healing.

关键词： Sodium humate Wound healing Transforming growth factor-β Smad Rat

Study of nano-manipulation approach based on the least action principle using AFM based robotic system 36

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Study of nano-manipulation approach based on the least actio...

Comparisons of Metabolic Profiles for Carbohydrates,Amino Acids,Lipids,Fragrance and Flavones During Grain Development in indica Rice Cultivars

第36届中国控制会议

作者： Shuai Yuan Lianqing Liu zhidong wang Ning Xi Yuechao wang State Key Lab.Robot. SIA.Chinese Academy of Sciences Shenyang Jianzhu University Graduate University of the Chinese Academy of Sciences Dept.of Advanced Robotics Chiba Institute of Technology Dept.of Industrial and Manufacturing Systems Engineering Emerging Technologies InstituteUniversity of Hong Kong

ISBN: (纸本)9781538629185

Atomic force microscopy（AFM） is originally used to observe the sample surface,and then extended to the area of *** can be quite valuable in the further study of maneuvering *** of the influence of the tip morphology on the tip pushing direction,it is difficult to establish an effective operating model for stably manipulating nanoparticles with controllable manipulation *** resolve this problem,the acting force of manipulating the nano-particle is analyzed firstly based on the least action *** the influence of the contact point between the nano-particle and the tip is taken into account on the pushing direction,and manipulation of the nano-particle is modeled to predict its position after ***,the model parameter is calibrated through several ***,the proposed model is verified by assembling the *** experimental results illustrate that the model can effectively predict the nano-particle position after maneuvering,and can improve the manipulation efficiency.

关键词： Least action principle AFM Nano-manipulation

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Rice science 2022年第2期29卷 155-165页

作者： CHEN Yibo wang zhidong wang Chongrong LI Hong HUANG Daoqiang ZHOU Degui ZHAO Lei PAN Yangyang GONG Rong ZHOU Shaochuan Guangdong Academy of Agricultural Sciences Rice Research Institute/Guangdong Key Laboratory of New Technology in Rice BreedingGuangzhou 510640China

We used a widely targeted metabolomics approach to examine the metabolic changes in three pedigreed indica cultivars(Meixiangzhan 2,Meisizhan and Qixinzhan),with different eating qualities,at 8,15 and 30 d after flowering(DAF)to explore the formation mechanism of rice eating and nutritional qualities at a global metabolic level.A total of 623 metabolites were identified,and results showed that metabolic variations among rice cultivars decreased with grain developmental stage,suggesting that sufficient carbohydrate and amino acid supply during grain development may contribute to excellent rice eating and nutritional quality *** 19:0 and 16:1 were beneficial for excellent eating quality formation during grain *** fragrance was attributed mainly to spermidine andγ-aminobutyric *** cultivars with excellent eating quality at 15-30 DAF had relatively higher flavone content,possibly because they had adequate carbohydrate and amino acid contents during grain *** results provided insight into the mechanisms for establishing rice eating and nutritional qualities during grain formation at a global metabolic level,and can be applied towards improving rice quality.

关键词： eating quality metabolomics nutritional quality high-quality rice grain development