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Chinese automation Congress (CAC)

作者： Tijian Zhu Yuan Zhu Chuan-Ke Zhang School of Automation China University of Geosciences Wuhan China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education

ISBN: (纸本)9781665426480

With the rapid development of sequencing technology, researchers can obtain a large number of single cell RNA sequencing (scRNA-seq) data which is useful for analysis of cell fate decision and growth process at individual cell resolution. But due to the limitations of sequencing technology, the data acquired has dropouts which may affect the results of down-steam analysis. Therefore, many algorithms have been proposed to impute the data before clustering, here in, imputation and clustering are considered as two separate processing stage. In this paper, we adopt a clustering algorithm—Incomplete Multiple Kernel k-means Clustering with Mutual Kernel Completion (MKKM-IK-MKC) to analyze scRNA-seq data. It unifies imputation and clustering into a process. Comparing with some existing "two stage" (imputation +clustering) algorithms, the experimental results on five scRNA-seq datasets from various species demonstrate the effective performance of our new proposed method.

关键词： Dimensionality reduction Sequential analysis automation RNA Clustering algorithms Optimization methods Iterative methods

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A new method to Identify the Young Females' Body Type based on SVM can be applied to sportswear

A new method to Identify the Young Females' Body Type based ...

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作者： Xiaojun Ding Suyu Zhang Fengyuan Zou College of Fashion Zhejiang Sci-Tech University Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education of ChinaZhejiang Sci-Tech University

Sportswear Design is no longer limited to the functionality and enhance the ability of *** expression of fitness and comfort has become another focus of *** development of the human body measurement technology,the availability of body size can be divided into more detailed ones,which provide technical support and guarantees for the sportswear *** this paper,young women of Jiangsu and Zhejiang province are taken as *** female's body data in Jiangsu and Zhejiang areas are obtained by using 3D Body *** according to the four parts of body shape character,we can classify human data into different kinds of female's body *** the process,SVM(support vector machine) model is used to identify the young female's shape,and compares with BP network *** results show that SVM can avoid the experience factors in the realization of neural *** model is quicker and higher precision than BP neural network *** is an effective identification and classification *** is conducive to the sportswear design and develop of this group.

关键词： 3D body scan young female shape body classification support vector machine BP neural network Sportswear

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Fabrication of Micro/Nanoelectrode Using Focused-ion-Beam Chemical Vapor Deposition, and its Application to Micro-ECDM

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Procedia CIRP 2016年 42卷 733-736页

作者： Dengji Guo Xiaoyu Wu Jianguo Lei Bin Xu Reo Kometani Feng Luo Shenzhen Key Laboratory of Advanced Manufacturing Technology for Mould & Die Shenzhen University Shenzhen 518060 Guangdong PR China Graduate School of Engineering The University of Tokyo Tokyo 113-8656 Japan

Micro electro-chemical discharge machining (micro-ECDM) is a key technology in the precision manufacturing. The electrode, which is the key element for achieving a high-precision ECDM, attracts the interests of many researchers. However, regarding the fabrication techniques of the electrode, the achievable precisions are still resting on micrometer scale, the processes are not simple, or electrodes with high complex three-dimensional (3D) shapes are difficult to be obtained. Basing on such a background, in this work, focused-ion-beam chemical vapor deposition (FIB-CVD) which is an effective tool in fabricating 3D micro/nanostructure for achieving various micro/nanoelectromechanical devices (MEMS/NEMS), was first time introduced to fabricate micro/nanoelectrode and furthermore ECDM processes using FIB-CVD-fabricated electrodes could be attempted. Differing to the conventional metallic electrodes, micro/nanoelectrodes in the material of amorphous platinum (Pt) were obtained. Three electrodes with the same diameter 10 μm and height 28 μm were fabricated on the polished tip surfaces of stainless needles, and consequently applied to micro-ECDM with varied low open voltages 10, 12.5 and 15 V. Microholes were fabricated on the 304 austenitic stainless steel. The hole diameter and the unilateral discharge gap were found to be almost linearly increasing with the increase of open voltage. In case of using the open voltage 10 V, the unilateral discharge gap was found to be 6.6 μm. Moreover, fabrications of pillar, horn, corner, array types of 3D nanoelectrodes were demonstrated. These results indicate the potentialities of 3D micro-ECDM using complex 3D micro/nanoelectrode, and a deeper study into the science of ECDM/EDM phenomenon at submicron scale.

关键词： Micro electro-chemical discharge machining Micro/nanoelectrode Micro-hole Focused-ion-beam chemical vapor deposition Three-dimensional

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key technologies on YAG laser engraving ceramic anilox roll

Key technologies on YAG laser engraving ceramic anilox roll

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International Conference on Electrical and Control Engineering (ICECE)

作者： Hongcai Wang Yang Wang Mingjiang Yang Key Laboratory of Mechanics in Advanced Manufacturing Institute of Mechanics Chinese Academy of Sciences Beijing China School of Mechatronics Engineering Harbin Institute of Technology Harbin China

As the heart of Flexography,laser engraving ceramic anilox roll requires that the diameter and depth of each cell is changeable, and the distribution of cell should be 30°-hexagon, 45°-quadrangle or 60°-hexagon. By modulating the laser cavity gain from step way to gradual chang way,the wave modulating technology of high repetition light pulse solves the problem of increasing absorbency of ceramic to YAG laser. By engraving the same cell with grouped light pulses,the technology of high repetition and grouped pulses solves the problem of engraving high depth cell. By detecting with corder and processing using alterable divider coefficient,the technology of tow-dimension controllable distribution solves the problems of orientation and distribution of each cell. These three YAG laser texturing technologies above-mentioned are the key technologies to realize YAG laser engraving ceramic anilox roll.

关键词： Ceramics Measurement by laser beam Presses Process control Timing Laser applications

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Stability and Neimark-Sacker Bifurcation of Leslie-Gower Predator-Prey System with Two Delays

Stability and Neimark-Sacker Bifurcation of Leslie-Gower Pre...

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第三十九届中国控制会议

作者： Wei Yin Weiqi Qin Xiaowei Jiang Xiangyong Chen Ming Chi School of Automation China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation of Complex Systems Affiliated Hospital of Shandong Medical College School of Automation and Electrical Engineering Linyi University Huazhong University of Science and Technology

Neimark-Sacker bifurcation of a delay differential equation modeling two-enterprise interaction mechanism is investigated. For the demands of computer simulation applications, the discrete-time two-enterprise interaction model is proposed by using the forward Euler scheme. By discussing the characteristic equation of linearized part, the local stability criterion of the positive fixed point is presented. Time lag is selected as the bifurcation parameter. Then it is demonstrated that variation of time lag may result in Neimark-Sacker bifurcation. Furthermore, derivations for the directions and stability of Neimark-Sacker bifurcation are also given. Finally, we simulate the main results.

关键词： Leslie-Gower model Delay Stability Neimark-Sacker bifurcation

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The YAG laser texturing technology and application with controllable disorder distribution

The YAG laser texturing technology and application with cont...

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2011 2nd International Conference on Mechanic automation and Control Engineering, MACE 2011

作者： Wang, Hongcai Wang, Yang Zhan, Jian Yang, Mingjing School of Mechatronics Engineering Harbin Institute of Technology Harbin China Key Laboratory of Mechanics in Advanced Manufacturing Institute of Mechanics Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781424494392

The special morphology of spots isolated from each other could lead the laser texturing (LT) sheet to better stamping and coating properties, compared with shot Blast texturing (SBT) sheet and Electro-discharge Texturing (EDT) sheet. While the spots with regular distribution caused the laser texturing sheet appearing fringes easily. There were three methods to achieve YAG laser texturing disorder distribution spots, including controlling disorder delay, controlling disorder deflection, and controlling disorder image carving, which could reach the disorder spots texturing effect of EDT, and resolve the fringes problem of laser texturing. JM-3000 YAG laser texturing equipment was composed by mechanical system, laser system, controlling system, the outside optical system, frequency convertion cooling system and protection gas system, which achieved the disorder spots distribution of YAG laser texturing. © 2011 IEEE.

关键词： Yttrium aluminum garnet

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Mode-locked fiber laser of 3.5 μm using a single-walled carbon nanotube saturable absorber mirror

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Chinese Optics Letters 2022年第1期20卷 79-84页

作者： Jincheng Wei Peng Li Linpeng Yu Shuangchen Ruan keyi Li Peiguang Yan Jiachen Wang Jinzhang Wang Chunyu Guo Wenjun Liu Ping Hua Qitao Lü Shenzhen Key Laboratory of Laser Engineering Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education InstitutesGuangdong Provincial Key Laboratory of Micro/Nano Optomechatronics EngineeringCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118China State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China Faculty of Engineering and Physical Sciences University of SouthamptonSouthampton SO 171BJUK Han’s Laser Technology Industry Group Co. Ltd.Shenzhen 518057China

We report on a mid-infrared fiber laser that uses a single-walled carbon nanotube saturable absorber mirror to realize the mode-locking *** laser generates 3.5 μm ultra-short pulses from an erbium-doped fluoride fiber by utilizing a dual-wavelength pumping *** mode-locking is achieved at the 3.5 μm band with a repetition rate of 25.2 *** maximum average power acquired from the laser in the mode-locking regime is 25 *** experimental results indicate that the carbon nanotube is an effective saturable absorber for mode-locking in the mid-infrared spectral region.

关键词： mid-infrared laser fluoride fiber laser mode-locked laser saturable absorber

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key technologies on YAG laser engraving ceramic anilox roll

Key technologies on YAG laser engraving ceramic anilox roll

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2nd Annual Conference on Electrical and Control Engineering, ICECE 2011

作者： Wang, Hongcai Wang, Yang Yang, Mingjiang School of Mechatronics Engineering Harbin Institute of Technology Harbin China Key Laboratory of Mechanics in Advanced Manufacturing Institute of Mechanics Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781424481637

As the heart of Flexography, laser engraving ceramic anilox roll requires that the diameter and depth of each cell is changeable, and the distribution of cell should be 30-hexagon, 45-quadrangle or 60-hexagon. By modulating the laser cavity gain from step way to gradual chang way, the wave modulating technology of high repetition light pulse solves the problem of increasing absorbency of ceramic to YAG laser. By engraving the same cell with grouped light pulses, the technology of high repetition and grouped pulses solves the problem of engraving high depth cell. By detecting with corder and processing using alterable divider coefficient, the technology of tow-dimension controllable distribution solves the problems of orientation and distribution of each cell. These three YAG laser texturing technologies above-mentioned are the key technologies to realize YAG laser engraving ceramic anilox roll. © 2011 IEEE.

关键词： Cells

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A Dft Study on Half-Metallicity of Ruddlesden–Popper Layered Perovskite Bi8ba4mn8o28

SSRN

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SSRN 2023年

作者： Zhang, Ming Peng, Kai Zhang, Chi Ma, Linhao Liu, Yuqing Zhao, Junjie Wang, Ruzhi Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China The Key Laboratory of Advanced Functional Materials Ministry of Education of China Beijing University of Technology Beijing100124 China

Half-metallic ferromagnet has attracted intense interest due to its unique electronic structure and potential applications in spintronic devices. The structural properties, electronic structure, and magnetism are systematically investigated for Ruddlesden-Popper layered Perovskite Bi8Ba4Mn8O28 by using the first-principles calculations. It is found that Bi8Ba4Mn8O28 is a half-metallic ferromagnet with a saturated magnetic moment of 31 μB f.u.-1 at its ground state with the orthorhombic Pbnm symmetry, which ground state is determined by the symmetry analysis, and the calculations of the total energy, the formation energy, and the magnetic exchange interaction. We demonstrate that the half-metallicity of Bi8Ba4Mn8O28 is fairly robust against large uniform and tetragonal distortions. Furthermore, the surface effect on half-metallic properties is also discussed. It is shown that all terminations but Mn1O can maintain their half-metallic properties and present good robustness of half-metallicity with rather wide half-metallic gap. © 2023, The Authors. All rights reserved.

关键词： Electronic structure

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Engineering Defect-Rich Anorthite Via Co2 Weathering Decalcification for Enhanced Fluoride Removal

SSRN

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SSRN 2024年

作者： Liu, Wanchen Liu, Peng Yang, Yunfei Wu, Junshu Wang, Jinshu Xu, Meng Zhou, Wenyuan Li, Yongli Li, Hongyi Key Laboratory of Advanced Functional Materials Ministry of Education College of Materials Science & Engineering Beijing University of Technology Beijing100022 China Faculty of Materials and Manufacturing

Surface hydroxyl group exchange has been identified as a primary factor in the fluoride adsorption process. However, the construction of surface oxygen defects for producing more surface hydroxyl -OH has been involved in high-temperature procedures or strong corrosive effect, thus necessitating the development of effective methods for the practical applications. In this work, anorthite(CaAl2Si2O8, abbr. An) with abundant surface oxygen vacancies (Ov) is facilely synthesized through CO2 weathering decalcification chemistry. The resultant calcium-deficient anorthite (de-Ca An) adsorbent shows better adsorption performance towards fluoride in the solution phase. Typically, the removal efficiency reaches 99.5% (60 mg de-Ca An) after adsorption equilibrium with the fluoride concentration of 20 mg/L (60 mL, pH = 3), and the saturated adsorption capacity is 82.5 mg/g. More Ov appearing on de-Ca An increases surface -OH content and thus promotes adsorption performance, which is verified by first-principles calculations and abundant spectrum analyses. In addition, the effects of pH, surface potential, fluoride concentration, and co-existing anions are also discussed extensively to understand how to prefer adsorption conditions for optimum defluoridation performance. The judicious chemical composition and defect engineering co-promote the efficient fluoride removal of the de-Ca An adsorbent, thus exhibiting significant potential for cleaning fluoride-containing water. © 2024, The Authors. All rights reserved.

关键词： Adsorption

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