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Recent advances in micro- and nano-machining technologies

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Frontiers of Mechanical Engineering 2017年第1期12卷 18-32页

作者： shang gao Han HUANG School of Mechanical and Mining Engineering The University ofQueensland QLD 4072 Australia Key Laboratory for Precision andNon-traditional Machining Technology of Ministry of Education DalianUniversity of Technology Dalian 116024 China School of Mechanical and Mining Engineering The University ofQueensland QLD 4072 Australia

Device miniaturization is an emerging advanced technology in the 21 st century. The miniaturiza- tion of devices in different fields requires production of micro- and nano-scale components. The features of these components range from the sub-micron to a few hundred microns with high tolerance to many engineering materi- als. These fields mainly include optics, electronics, medicine, bio-technology, communications, and avionics. This paper reviewed the recent advances in micro- and nano-machining technologies, including micro-cutting, micro-electrical-discharge machining, laser micro-machin- ing, and focused ion beam machining. The four machining technologies were also compared in terms of machining efficiency, workpiece materials being machined, minimum feature size, maximum aspect ratio, and surface finish.

关键词： micro machining cutting electro dischargemachining (EDM) laser machining focused ion beam(FIB)

Liquid metal E-tattoo

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Science China(Technological Sciences) 2023年第6期66卷 1551-1575页

作者： gao shang CUI ZiLiang WANG XueLin SUN XuYang School of Engineering Medicine Beihang UniversityBeijing 100191China

The past twenty years have witnessed a rapid advancement in medical devices and healthcare *** by the growing demand for personalized,preventive,predictive and participatory medicine,the on-skin portable healthcare system with fascinating merits has attracted great ***,the electronic tattoo(E-tattoo)that can form intimate contact and deform with the skin movement is regarded to play an important role in further healthcare monitoring and disease *** with the combination of fluidity and metallic properties,liquid metals(LMs)have become an emerging class of functional materials and are regarded as the ideal candidate for soft ***,we highlighted the key advantages of LM in E-tattoo,classified the LM based conductive inks,and summarized the important pattern technologies in fabrication of LM *** typical applications of healthcare detection and therapy were also ***,outlooks were provided for future E-tattoo development.

关键词： liquid metal E-tattoo flexible electronic skin printing technologies healthcare applications

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A Review of Research Progress in the Genesis of Colloform Pyrite and Its Environmental Indications

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Acta Geologica Sinica(English Edition) 2016年第4期90卷 1353-1369页

作者： gao shang HUANG Fei WANG Yinghui gao Wenyuan Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines College of Resource and Civil Engineering Northeastern University

Colloform pyrite is a special form of nano-micro polycrystalline aggregation growth, for which a suitable term is ＂aggregates of nano-micro crystals＂. This kind of colloform texture is observed in various geological bodies, such as ancient sedimentary rocks, modern marine and lake sediments, various types of ore deposits, and modern seafloor hydrothermal vents. This paper summarizes the latest developments and research into the definition, formation mechanisms, and environmental indications of colloform pyrite. There appears to be three main formation mechanisms of colloform pyrite： pseudomorphic replacement; biogenic precipitation; and inorganic precipitation. The morphology, particle size, trace element content and preferential growth orientations of coUoform pyrite microcrystals can be important indicators for sedimentary environments, hydrothermal activity, and ore-forming processes. We suggest that the microscopic features of nano-micro crystals in colloform pyrite and their aggregation growth patterns need further investigation. The relationships between formation mechanisms of colioform pyrite, organic activity and depositional environments require further exploration. To reveal the nature of nano-micro grain aggregation growth in colloform pyrite and analyse its growth environment and evolutionary history, it is supposed to apply nanoscientific and nanotechnological methods, further integrate consideration of macroscopic geological backgrounds and microscopic mineral growth phenomena, combine high-resolution imaging systems and in situ quantitative microanalysis methods and constitute a mergence of earth science, thermodynamics and kinetics, life science, material science, and chemistry in the study.

关键词： colloform pyrite nano-micro crystals aggregation growth mechanism environmental indication nanoscience and nanotechnology

Improved genetic algorithm for nonlinear programming problems

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Journal of Systems Engineering and Electronics 2011年第3期22卷 540-546页

作者： Kezong Tang Jingyu Yang Haiyan Chen shang gao School of Computer Science and Technology Nanjing University of Science and TechnologyNanjing 210094P.R.China School of Computer Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003P.R.China

An improved genetic algorithm（IGA） based on a novel selection strategy to handle nonlinear programming problems is *** individual in selection process is represented as a three-dimensional feature vector which is composed of objective function value,the degree of constraints violations and the number of constraints *** is easy to distinguish excellent individuals from general individuals by using an individuals＇ feature ***,a local search（LS） process is incorporated into selection operation so as to find feasible solutions located in the neighboring areas of some infeasible *** combination of IGA and LS should offer the advantage of both the quality of solutions and diversity of *** results over a set of benchmark problems demonstrate that IGA has better performance than other algorithms.

关键词： genetic algorithm(GA) nonlinear programming problem constraint handling non-dominated solution optimization problem.

Controlling structural vibrations in wind turbines by constructing function V

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Science China(Technological Sciences) 2015年第7期58卷 1186-1195页

作者： DENG Ying gao Jie TIAN De ZHOU Feng gao shang ZHAO Ming Institute of Renewable Energy North China Electrical Power University State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (NCEPU) Yunnan Electric Power Grid Co. Power Research Institute

For a variable speed large scale wind turbine, the vibration issues become a key problem that cannot be ignored in the turbine＇s life cycle. Wind turbine tower vibration will cause superfluous mechanical loads. To resolve the vibration issue, a method for constructng the energy function V is proposed to meet the demands of safe operation. The Lyapunov theorem has been em- bedded in a wind turbine control algorithm, proving the theoretical feasibility of stability control based on function V. Accord- ing to an analysis of this complex nonlinear model for the wind turbine, the general method of constructing an energy function suitable for a wind turbine is presented explicitly. The feasibility of applying an energy function to wind turbine vibration con- trol is verified experimentally using a 3.0-MW direct drive wind turbine model. The experimental results indicate that the dy- namic performance of the tested wind turbine model with energy function control is significantly better than that of the uncon- trolled structure in terms of the reduction of nacelle acceleration, velocity, and displacement response.

关键词： wind energy stability analysis vibration control Lyapunov theorem

Quantum algorithm for kernelized correlation filter

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Science China(Information Sciences) 2023年第2期66卷 293-294页

作者： shang gao Shijie PAN Yuguang YANG Faculty of Information Technology Beijing University of Technology State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications

Dear editor,Kernelized correlation filter(KCF) is a key component of target tracking that is aimed to distinguish the target from the surrounding environment and is a fundamental problem in computer vision. Motivated by the progress in quantum computing, we present a quantum algorithm for KCF based on the core algorithm proposed by Henriques et al. [1, 2].This algorithm comprises two stages: training and detection. In the training stage, two quantum sub-algorithms,

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Atomistic understanding of rough surface on the interfacial friction behavior during the chemical mechanical polishing process of diamond

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Friction 2024年第6期12卷 1119-1132页

作者： Song YUAN Xiaoguang GUO Hao WANG Renke KANG shang gao State Key Laboratory of High-performance Precision Manufacturing Dalian University of TechnologyDalian 116024China

The roughness of the contact surface exerts a vital role in *** is still a significant challenge to understand the microscopic contact of the rough surface at the atomic ***,the rough surface with a special root mean square(RMS)value is constructed by multivariate Weierstrass–Mandelbrot(W–M)function and the rubbing process during that the chemical mechanical polishing(CMP)process of diamond is mimicked utilizing the reactive force field molecular dynamics(ReaxFF MD)*** is found that the contact area A/A0 is positively related with the load,and the friction force F depends on the number of interfacial bridge *** the surface roughness will increase the friction force and friction *** model with low roughness and high lubrication has less friction force,and the presence of polishing liquid molecules can decrease the friction force and friction *** RMS value and the degree of damage show a functional relationship with the applied load and lubrication,i.e.,the RMS value decreases more under larger load and higher lubrication,and the diamond substrate occurs severer damage under larger load and lower *** work will generate fresh insight into the understanding of the microscopic contact of the rough surface at the atomic level.

关键词： diamond random roughness reactive force field molecular dynamics(ReaxFF MD) friction Weierstrass-Mandelbrot(W-M)function chemical mechanical polishing(CMP)

A novel degradable injectable HLC-HPA hydrogel with antiinflammatory activity for biomedical materials:Preparation,characterization,in vivo and in vitro evaluation

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Science China(Technological Sciences) 2020年第11期63卷 2449-2463页

作者： gao shang QU LinLin ZHU ChenHui OUYANG PingKai FAN DaiDi Shaanxi Key Laboratory of Degradable Biomedical Materials School of Chemical EngineeringNorthwest UniversityXi’an 710069China Shaanxi R&D Center of Biomaterials and Fermentation Engineering School of Chemical EngineeringNorthwest UniversityXi’an 710069China Biotech&Biomed Research Institute Northwest UniversityXi’an 710069China College of Biotechnology and Pharmaceutical Engineering Nanjing Tech UniversityNanjing 211816China

In situ injectable hydrogels,which have great potential in tissue engineering,are characterized by simple preparation,minimal invasiveness and adaptation to complex ***,injectable hydrogels have higher requirements for biocompatibility and safety due to their use in vivo ***,in this study,a human-like collagen(HLC)-based in situ gel-forming injectable HLC-HPA hydrogel was synthesized by combining the amino group of HLC with the carboxyl group of HPA activated using 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride(EDC)and N-hydroxysuccinimide(NHS),followed by crosslinking by horseradish peroxidase(HRP)and H_2O_2,and used as scaffold material for tissue *** hydrogel stiffness,gel time and biodegradation rate could be easily and independently adjusted by varying the H_2O_2 and HRP *** electron microscope(SEM)clarified the homogeneous porous and interconnected internal structures of the *** vitro cell viability and in vivo degradation experiments confirmed that the HLC-HPA hydrogel had good biodegradability and excellent ***,in cultured macrophages,the HLC-HPA hydrogel showed anti-inflammatory activity by reducing the amount of the pro-inflammatory cytokines tumor necrosis factor-α(TNF-α)and interleukin-6(IL-6)and increasing the secretion of the anti-inflammatory cytokine interleukin-10(IL-10)induced by lipopolysaccharide(LPS).Meanwhile,in animal experiments,HLC-HPA hydrogels exhibit excellent biocompatibility and have properties of hemostasis and reduction of inflammatory ***,the HLC-HPA hydrogel prepared in this study has great potential for development for use in the biomedical field.

关键词： injectable hydrogels human-like collagen biocompatibility anti-inflammation hemostasis

CPAC: Energy-Efficient Algorithm for IoT Sensor Networks Based on Enhanced Hybrid Intelligent Swarm

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Computer Modeling in Engineering & Sciences 2019年第10期121卷 83-103页

作者： Qi Wang Wei Liu Hualong Yu shang Zheng shang gao Fabrizio Granelli Jiangsu University of Science and Technology Zhenjiang212003China University of Trento Via Sommarive 9Povo TN 38123Italy

The wireless sensor network(WSN)is widely employed in the application scenarios of the Internet of Things(IoT)in recent *** the lifetime of the entire system had become a significant challenge due to the energy-constrained fundamental limits of sensor nodes on the perceptual layer of *** clustering routing structures are currently the most popular solution,which can effectively reduce the energy consumption of the entire network and improve its *** paper introduces an enhanced hybrid intelligential algorithm based on particle swarm optimization(PSO)and ant colony optimization(ACO)*** enhanced PSO is deployed to select the optimal cluster heads for establishing the clustering *** improved ACO is introduced to realize the data transmission from terminal sensor nodes to the base *** proposed algorithm can effectively reduce the entire energy consumption and extend the lifetime of IoT sensor *** with the traditional algorithms,the simulation results show that the presented novel algorithm in this paper has obvious optimization and improvement in network lifetime and energy utilization efficiency.

关键词： Internet of Things wireless sensor network particle swarm optimization ant colony optimization energy efficiency