Articles de revues : « Software micro-structures »

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Huang, Guo Qiang, Jian Qun Liu et Wei Qiang Gao. « Development of CNC System Software for Micro V-Groove Machine Tool ». Key Engineering Materials 679 (février 2016) : 37–41. http://dx.doi.org/10.4028/www.scientific.net/kem.679.37.

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The computerize numerical control (CNC) system is one of the key factors for the development of micro v-groove machine tools to fabrication micro v-groove structures. Based on the investigation on the machining of micro v-groove structures, a developed software contains five modules: editing, automatic programming, program control, manual control and human machine interface. A3200 software based motion controller integrated with the machine characteristics is used in this study to develop the motion control functions of the micro v-groove machine tool. Meanwhile, a method is proposed to redefine the instructions of M, T and S by setting monitoring points so as to enhance the scalability of CNC system. The results show that the CNC system software is not only stable and reliable, but also satisfies the basic requirements of the ultra-precision machining of micro v-groove structures.

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Zhang, Yong, Zhen Long Wang, Z. Y. Li et Wan Sheng Zhao. « Research on Electrode Wear Prediction and Compensation On-Line Technology for Micro EDM Application ». Key Engineering Materials 392-394 (octobre 2008) : 166–71. http://dx.doi.org/10.4028/www.scientific.net/kem.392-394.166.

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A micro-EDM equipment which can fabricate three-dimensional micro-structures is developed. A method of electrode wear compensation on-line which is very important to micro 3D structures machined by micro-EDM is presented. In this method, the wear of electrode can be predicted by the statistics law of open rate of discharge status, therefore, its precise model which is very difficult to build as well as the special CAD/CAM system is hardly necessary. At the same time, the micro-EDM CAD/CAM technology which applies the universal CAD/CAM software for milling is also researched and experienced on Unigraphics (UG). At last, micro 3D structures, a micro hemisphere with diameter ∅150+m and a micro 3D beam which is very popular in MEMS, are machined on silicon wafer by this way, which proves the wide useful of this method and the promising application in MEMS.

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Gheorghe, Ion Gheorghe, Liliana Laura Badita, Adriana Cirstoiu, Simona Istriteanu, Veronica Despa et Stergios Ganatsios. « "Mechatronics Galaxy" a New Concept for Developing Education in Engineering ». Applied Mechanics and Materials 371 (août 2013) : 754–58. http://dx.doi.org/10.4028/www.scientific.net/amm.371.754.

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This paper initiates the launch and the integration of a new scientific concept: "Mechatronics Galaxy", a support of industrial research for European sustainable and strategic development. This new concept is based on achievement and development of evolutionary and integrative-synergistic concepts regarding micro-nanomechatronics engineering, micro-nanoelectronics engineering and micro-nanoIT engineering for: spatial, temporal and functional integration;intelligent adaptive behaviour based on perception, self-learning, self-diagnostics and systemic reconfiguration; adequate flexibility of software and hardware structures; predictive development of micro-nano-mechatronics structures and of the intelligent computerized applicability with high added value; simultaneous mix-integrative design of micro-nano-products, micro-nano-systems and micro-nano-technologies; a strategy of technological impact in economy, industry, society and education. Thus, the new concept "Mechatronics Galaxy" creates and develops micro-nano-mechatronics engineering, based on fundamental and applied techniques: micro-nano-mechatronics, micro-nano-robotics, micro-nano-integronics, micro-nano-sensoristics, micro-nano-actuators, micro-nano-processing and intelligent micro-nano-manufacturing.

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Li, Cui Yu, et Rui Wang. « The Application of Finite Element Analysis Software MSC.Marc in Numerical Simulation of Fabric ». Advanced Materials Research 332-334 (septembre 2011) : 2116–19. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.2116.

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The draping and buckling of woven fabric are simulated with the finite element method based on the micro-mechanical constitutive model and orthotropic constitutive model under gravity load. Compared with the traditional orthotropic mechanical model of the fabric, the micro-mechanical constitutive model characterizes the special properties of woven fabric due to its micro-weaving structures. The woven fabric sheet is discretized with 8-nodes shell elements which are designed for finite deformation and suffice to describe the large rotation of fabric sheet during draping, for the sake of simplicity, the nodes of the fabric sheet on the edges of the desk are assumed to be fixed. Compared with the experimental ones, the simulation results with the micro-mechanical constitutive model are in good agreement with the observations. The work paves the way for developing a virtual clothes trial system.

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Dong, Ying Huai, Zhen Long Wang, Zi Long Peng, Hui Chen et Wan Sheng Zhao. « Design and Fabrication of the Micro Turbine for Micro Gas Turbine Engine ». Advanced Materials Research 69-70 (mai 2009) : 530–34. http://dx.doi.org/10.4028/www.scientific.net/amr.69-70.530.

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The designing of a micro turbine for micro gas turbine engine is presented in this paper. Micro power system is becoming more and more important for micro- and nano-scale system. The fast development of MEMS (Micro Electromechanical Systems) has strongly enhanced the application of new harder work materials. The fabrication of metallic 3D microstructures has been one of the most attractive topics of micro machining. Currently the basic materials of Micro-turbine Engineering were nonmetal materials such as SiC, most of them are 2D or quasi-3D structures. As a low cost, flexible, good repeatable machining process with negligible process forces, micro-EDM milling is well suited for freeform metallic micro structures. A three-dimensional micro turbine was fabricated by micro-EDM milling. A major problem in micro-EDM milling of complex 3D structure by using micro-electrode is the electrode wear. For reducing the impact of electrode wear, A new CAM system based on the UG software platform is developed in order to get good accuracy 2and higher efficiency. A simple tool path generation by CAD/CAM software and a general electrode wear compensation strategy is presented. The wear compensation can be apart from the design of CAD/CAM systems, so existing common CAD/CAM systems can be used to generate milling tool path with an unequal thickness lamination. And then post process for wear compensation and EDM milling can be done to modify tool path by adding wear compensation. The micro turbine blades of which the material is nickel alloy (GH4169) were successfully fabricated by using this strategy. The diameters of turbine are 2.8mm, and the height of each blade is 0.4mm.

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Lee, Chang-Chun, Nien-Ti Tsou et Taek-Soo Kim. « Preface : Nano/Micro Structures in Application of Computational Mechanics ». Computer Modeling in Engineering & ; Sciences 120, n^o 2 (2019) : 235–37. http://dx.doi.org/10.32604/cmes.2019.07807.

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Arcelli Fontana, F., S. Maggioni et C. Raibulet. « Understanding the relevance of micro-structures for design patterns detection ». Journal of Systems and Software 84, n^o 12 (décembre 2011) : 2334–47. http://dx.doi.org/10.1016/j.jss.2011.07.006.

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Chkalov, Ruslan. « Telecommunication Network for Controlling the Processes of Micro-Sized Structures Topology Formation ». MATEC Web of Conferences 346 (2021) : 01020. http://dx.doi.org/10.1051/matecconf/202134601020.

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The article is devoted to the task of organization of complex interaction between separate modules of technological installations for material processing. The basic principles of control software development of industrial laser systems for precision processing, the possibility of implementing remote control of the complex executing hardware are considered. The system application examples for solving problems of high-precision processing of transparent solid materials are shown.

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Zaideman, Oded, et Anath Fischer. « Geometric Bone Modeling : From Macro to Micro Structures ». Journal of Computer Science and Technology 25, n^o 3 (mai 2010) : 614–22. http://dx.doi.org/10.1007/s11390-010-9350-0.

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Zhao, Zhong Li, Bao Jun Zhou, Jian Zhuang, Da Ming Wu, Ya Jun Zhang, Xiu Ting Zheng et Kai Fang Dang. « Design and Simulation Analysis of a New Type of Micro Metal-Plastic Heat Radiator ». Key Engineering Materials 562-565 (juillet 2013) : 1127–31. http://dx.doi.org/10.4028/www.scientific.net/kem.562-565.1127.

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With the development of micro-nanomachining technology (MNMT), micro heat radiator is getting attention. In this paper, the heat dissipation mechanism of light emitting diode (LED) ball lamp is introduced. And the LED heat radiator is simplified. On the basis of that, a new type of micro metal-plastic heat radiator of LED is put forward. And the LED heat radiator is simplified. A series of numerical simulations are carried out to compare the heat dissipation performance of micro heat radiator respectively made by metal, plastic, metal-plastic composite by the FloEFD software. Micro metal-plastic heat radiator structures, including fin spacing, fin thickness, fin height and substrate thickness, are carry out to be simulated.

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Peng, Zi Long, Dong Fang, Yi Nan Li et Yong Hong Liu. « Development of a TriaxialMicro EDM Machine Tool Based on Programmable Multi-Axes Controller (PMAC) ». Applied Mechanics and Materials 595 (juillet 2014) : 180–84. http://dx.doi.org/10.4028/www.scientific.net/amm.595.180.

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Based on the research of key technologies for achieving micro EDM process, a triaxialmicro EDM machine tool based on PMAC has been developed. The micro EDM machining tool consists of four parts: triaxial precision motion platform, motion control system, micro-energy pulse generator and CCD microscope imaging system. The hardware and software control system based on industrial control computer and PMAC has been researched. The motion control program and PLC program have been developed for precise controlling the triaxial precision motion platform. The indispensable functions for micro EDM process such as contact perception function for measurement; fast servo control strategy for short circuit and so on has been achieved. Through a number of processing tests, it is proved that the triaxial micro EDM machine tool has the ability for machining micro holes, micro slots and micro structures steadily.

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Vingaard, Mathias, et Jesper deClaville Christiansen. « Erratum to : Sealing of polymer micro-structures by over-moulding ». International Journal of Advanced Manufacturing Technology 71, n^o 5-8 (20 décembre 2013) : 1525. http://dx.doi.org/10.1007/s00170-013-5541-5.

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Braun, Matías, Inés Ivañez et Josué Aranda-Ruiz. « Numerical analysis of the dynamic frequency responses of damaged micro-lattice core sandwich plates ». Journal of Strain Analysis for Engineering Design 55, n^o 1-2 (19 décembre 2019) : 31–41. http://dx.doi.org/10.1177/0309324719890958.

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In this work, a numerical analysis of the dynamic frequency responses of sandwich plates with micro-lattice core is presented. The finite element analysis is implemented in the commercial software Abaqus/Standard, calculating the natural frequencies and eigenmodes of sandwich plates containing defects on the micro-lattice structure. In order to include the presence of defects, an aleatory algorithm is developed in MATLAB. The effect of the damage percentage, cell type, cell size and material on the frequency and modal responses of the sandwich plates is highlighted. Results show that the dynamic frequency response may be useful for analysing practical issues related to non-destructive damage identification of imperfections in the micro-lattice core of sandwich structures.

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Natour, Ghaleb, et Fred Pauly. « Analysis of Materials and Structures in Scientific Applications Using Micro Focus Computed Tomography ». Key Engineering Materials 613 (mai 2014) : 239–43. http://dx.doi.org/10.4028/www.scientific.net/kem.613.239.

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With an efficient system for 3D-mikrofocus-computed-tomography, the analysis of materials, welding’s, joining’s and structures, with high resolution is possible. In the research center Jülich such a tomographic system is available and has been developed continuously for a wide range of applications. The field of work of the X-ray system and the applications ranges from the analysis of organic materials up to solid metal components like welding’s and joining technologies. The image acquisition is carried out by novel flat panel detectors. The performance of the 3D visualization is demonstrated using examples from various scientific areas and applications. The system makes it feasible to extend automatic defective recognition (ADR) also on a real-time basis. By the special construction and the choice of its components, in combination with individually developed software tools, different application spectra are possible, e.g. for rapid prototyping or reverse engineering as well as FEM analysis in real components.

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Xu, Xiaotian, Michael Newns et Mark Oxborrow. « Simulating the magnetic fields generated by piezoelectric devices using FEM software : Beyond the quasistatic approximation ». Journal of Applied Physics 132, n^o 20 (28 novembre 2022) : 205107. http://dx.doi.org/10.1063/5.0120630.

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A method for simulating coupled electromagnetic and mechanical vibrations on arbitrarily shaped piezoelectric structures is presented. This method is based on weak forms and can be implemented in any finite-element-method software, allowing editable access to their definitions. No quasi-static approximation is imposed, meaning that magnetic fields generated by displacement currents within piezoelectric materials are captured, enabling the flow of electromagnetic energy inside and around structures containing such material to be accurately simulated. The method is particularly relevant to the design of piezoelectric antennas, resonators, and waveguides exploiting either bulk or surface-acoustic waves. The accuracy and capabilities of the method are demonstrated by simulating, in COMSOL Multiphysics, (i) a Rayleigh mode on the surface of Z-cut lithium niobate crystal and (ii) a torsional mode of a cylinder of lead zirconium titanate (PZT-5H) ceramic functioning as a micro-antenna.

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Gommlich, Klaus, et Krischan Förster. « Textpatterns in a computer assisted translator's workstation ». HERMES - Journal of Language and Communication in Business 4, n^o 6 (27 juillet 2015) : 15. http://dx.doi.org/10.7146/hjlcb.v4i6.21454.

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A software package for a computer-assisted translator's workstation should contain a special module which consists of a database of preferred textual structures in the source and target languages, (TEXTPAT I), as well as a processor of typical translation cases (TEXTPAT II). TEXTPAT I includes micro- and macrostructures at four levels (text type, text type variants, chunks, syntactic and lexical structures). TEXTPAT II consists of lists of items for which translation rules have to be applied. Both textpats contribute to the idea of a translator's expert system.

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Liu, Tie Jun, Yi Long Wang, Wei Jun Zhang et Dong Mei Jiang. « The Kinematic Simulation of Micro-Miniature Rescue Robots Manipulator Based on CATIA and ADMAS ». Advanced Materials Research 753-755 (août 2013) : 2029–32. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2029.

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In order to improve the designing efficiency of micro-miniature rescue robot and predict its function, on the basis of studying the working theories of micro-miniature rescue robot research deeply. Constructing the three dimensional parametric model of micro-miniature rescue robots manipulator for applying the CATIA, importing it into the ADAMS which is a mechanical dynamic simulation software through SimDesigner between CATIA and ADAMS, conducting the subsequent constraint and driving addition to finish the kinematic analysis of the structure of the micro-miniature rescue robots manipulator. The kinematic simulation analysis which shortens the researching period, improves the designing quality as well as lays a good foundation for the structures deeper study and practical application. By means of analyzing the simulation result, getting the data which is agree to the theoretical calculation, proving the rationality and correctness of building the micro-miniature rescue robots mechanical manipulators model.

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Stanford, Bret, et Peter Ifju. « Aeroelastic topology optimization of membrane structures for micro air vehicles ». Structural and Multidisciplinary Optimization 38, n^o 3 (19 juillet 2008) : 301–16. http://dx.doi.org/10.1007/s00158-008-0292-x.

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Kirihara, Soshu, Toshiki Niki et Masaru Kaneko. « Terahertz Wave Properties of Ceramic Photonic Crystals with Graded Structure Fabricated by Using Micro-Stereolithography ». Materials Science Forum 631-632 (octobre 2009) : 299–304. http://dx.doi.org/10.4028/www.scientific.net/msf.631-632.299.

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Fabrication and terahertz wave properties of alumina micro photonic crystals with a diamond structure were investigated. The three-dimensional diamond structure was designed on a computer using 3D-CAD software. Acrylic diamond structures with alumina particles dispersion were formed by using micro-stereolithography. Fabricated precursors were dewaxed and sintered in the air. The electromagnetic wave properties were measured by terahertz time-domain spectroscopy. A complete photonic band gap was observed at the frequency range from 0.40 to 0.47 THz, and showed good agreement with the simulation results calculated by the plane wave expansion method. Moreover, a localized mode was obtained by introducing a plane defect between twinned diamond structures. The one-way transmission of the electromagnetic wave was realized by using this twinned photonic crystal with the graded diamond structure. They corresponded to the simulation by the transmission line modeling (TLM) method.

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Chou, Bai Ge, Heng Zhi Cai, Gang Zhou, Ya Jun Zhang et Jian Zhuang. « Design and Motion Simulation of the Clamping Mechanism of Micro-Structure Injection Molding Machine ». Advanced Materials Research 945-949 (juin 2014) : 670–75. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.670.

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Micro-structure injection molding machine is mainly used for processing the plastic products in micron-size or with micro-structures. This paper focuses on the design and control of the clamping mechanism of micro-structure injection molding machine. Firstly, the deformation of the clamping mechanism was analyzed. The simulation results shows that the clamping force is 5.0051×105N, and it’s bigger than the design value 500kN. Secondly, the kinetic characteristic of the clamping was simulated by ADAMS software. The curves of the displacement, velocity, clamping force of moving platen were analyzed. Thirdly, the control model of clamping mechanism was established. And the LQR controller was designed and simulated by Matlab. The rise time is 0.010s, the settling time is 0.026s and the steady-state is 0.307m.

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Humayun, Q., et U. Hashim. « Fabrication of Micro-Gap Structure by Reactive Ion Etching Technique (RIE) for Future Reproductivity of Nanogap Biosensor ». Advanced Materials Research 1109 (juin 2015) : 64–68. http://dx.doi.org/10.4028/www.scientific.net/amr.1109.64.

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The important role of reactive ion etching (RIE) technique is to etch the semiconductor surface directionally. The purpose of the current research is to fabricate polysilicon micro-gap structures by RIE technique for future biosensing application. Therefore zero-gap microstructure of butterfly topology was designed by using AutoCAD software and finally the designed was transferred to commercial chrome glass photomask. Ploysilicon wafer samples were selected to achieve high conductivity during electrical characterization measurement. The fabrication process starts from samples resist coating and then by employing photolithography through chrome glass photomask the zero-gap pattern of butterfly topology was transferred to resist coated sample wafer followed by resist stripping from exposed area and finally by reactive ion etching (RIE) technique the open area of polysilicon was etched directionally at different etching time to fabricate micro-gap structure on wafer samples. The spacing of fabricated micro-gap structures will be further shrink by thermal oxidation (size reduction technique) until to nanosize gap spacing. The proposed nanospacing gap will definitely show the capability to detect the bio molecule when inserted into the gap spacing.

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Li, Peng-fei, Yu Liu, Ya-dong Gong, Liang-liang Li, Kuo Liu et Yao Sun. « New deformation prediction of micro thin-walled structures by iterative FEM ». International Journal of Advanced Manufacturing Technology 95, n^o 5-8 (18 novembre 2017) : 2027–40. http://dx.doi.org/10.1007/s00170-017-1356-0.

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Yan, Jun, Haitao Hu, Zhixun Yang, Rui Wan et Yang Li. « Multi-scale analysis for helically wound structures with one-dimensional periodicity ». Engineering Computations 36, n^o 8 (7 octobre 2019) : 2911–28. http://dx.doi.org/10.1108/ec-10-2018-0489.

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Purpose The purpose of this study is to present a multi-scale analysis methodology for calculating the effective stiffnesses and the micro stresses of helically wound structures efficiently and accurately. The helically wound structure is widely applied in ocean and civil engineering as load-bearing structures with high flexibility, such as wire ropes, umbilical cables and flexible risers. Their structures are usually composed of a number of twisted subcomponents with relatively large slender ratio and have the one-dimensional periodic characteristic in the axial direction. As the huge difference between the axial length and the cross-section size of this type of structures, the finite element modeling and theoretical analysis based on some assumption are usually unavailable leading to the reduction of computability; even the optimization design becomes infeasible. Design/methodology/approach Based on the asymptotic homogenization theory, the one-dimensional periodic helically wound structure is equivalent to the one-dimensional homogeneous beam. A novel implementation of the homogenization is derived for the analysis of the effective mechanical properties of the helically wound structure, and the tensile, bending, torsional and coupling stiffness properties of the effective beam model are obtained. On this basis, a downscaling analysis formation for the micro-component stress in the one-dimensional periodic wound structure is constructed. The stress of micro-components in the specified geometry position of the helically wound structure is obtained basing on the asymptotic homogenization theory simultaneously. Findings By comparing with the result from finite element established accurately, the established multi-scale calculation method of the one-dimensional periodic helically wound structure is verified. The influence of size effects on the macro effective performance and the micro-component stress is discussed. Originality/value This paper will provide the theoretical basis for the efficient elastoplastic analysis of the helically wound structure, even the fatigue analysis. In addition, it is necessary to point out that the axial length of the helically wound structure in the general engineering problems that such as deep-sea risers and submarine cables.

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Devaraj, H., Kean C. Aw, E. Haemmerle et R. Sharma. « Fluid–Structure Interaction of High Aspect-Ratio Hair-Like Micro-Structures Through Dimensional Transformation Using Lattice Boltzmann Method ». International Journal of Applied Mechanics 08, n^o 08 (décembre 2016) : 1650095. http://dx.doi.org/10.1142/s1758825116500952.

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3D printed hair-like micro-structures have been previously demonstrated in a novel micro-fluidic flow sensor aimed at sensing air flows down to rates of a few milliliters per second. However, there is a lack of in-depth understanding of the structural response of these ‘micro-hairs' under a fluid flow field. This paper demonstrates the use of lattice Boltzmann methods (LBM) to understand this structural response towards a better optimization of the micro-hair flow sensors designed to suit the end applications' needs. The LBM approach was chosen as an efficient alternative to simulate Navier–Stokes equations for modeling fluid flow around complex geometries primarily for improved accuracy and simplicity with lesser computational costs. As the spatial dimensions of the sensor's flow channel are much larger in comparison to the actual micro-hairs (the sensing element), a multidimensional approach of combining two-dimensional (D2Q9) and three-dimensional (D3Q19) lattice configurations were implemented for improved computational speeds and efficiency. The drag force on the micro-hairs was estimated using the momentum-exchange method in the D3Q19 configuration and this drag force is transferred to the structural analysis model which determines the micro-hair deformation using Euler–Bernoulli beam theory. The entirety of the LBM Fluid–Structure Interaction (FSI) model was implemented within MATLAB and the obtained results are compared against the numerical model implemented on a commercially available software package.

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Zhou, Huan Wei, Xin Chen, Xin Du Chen et Ke Tian Li. « Dynamics Model of Micro-Displacement Stage Based on High-Frequency ». Key Engineering Materials 625 (août 2014) : 167–71. http://dx.doi.org/10.4028/www.scientific.net/kem.625.167.

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The optical structure has a large number of micro-structures, which has multiple arrays, complex free-form surface features. But those can not be achieved the requirements with traditional turning and grinding processing, it require to use high-frequency and micro-feed to get ultra-precision machining precision. After creating the 3D digital model of micro-displacement platform using Pro/Engineer, and analyzing the motion and the force, the paper studies the influencing factors about the rigidity and acceleration and explores the motion characteristics of the micro-displacement platform in the high-frequency control, and it the establishes the corresponding dynamics equation. The stiffness and linearity data is accessed after the micro-stage is simulated used by Admas and Ansys software. According to the above data, the structure of micro-stage is optimized in order to meet the ultra-precision machining accuracy and the quality of the workpiece. The research takes advantage of the favorable conditions of the Nanofabrication Laboratory, and it has completed the physical production of the micro-displacement platform supported by the introduction of innovative R&D team program of Guangdong Province, those provide a reliable experimental conditions for future in-depth study.

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Chen, Zhi, Cheng Wu, Hongbing Zhou et Hongzhi Yan. « A New Thermal Model for Predicted Discharge Craters in Micro/Nano-EDM Considering the Non-Fourier Effect ». Crystals 12, n^o 6 (1 juin 2022) : 794. http://dx.doi.org/10.3390/cryst12060794.

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Micro/nano-electrical discharge machining is an alternative preparation method for surface micro/nano-structures, but it is difficult to precisely control the size of the micro/nano-structures due to its unclear material removal mechanism. Thus, it is useful to study its machining mechanism to achieve high-efficiency and controlled processing. At present, most of the established EDM thermal models for predicting the discharge crater size are based on the classical Fourier heat conduction law, assuming that the conduction velocity of heat energy is infinite. However, the single-pulse discharge time of micro/nano-EDM is transitory (<1 μs), and thus, the steady state heat balance condition cannot be achieved in a single-pulse discharge time. In order to predict the size of the micro/nano electrical discharge craters more accurately, the non-Fourier effect was considered to study the temperature field distribution of micro/nano-EDM of single-pulse discharge machining. Firstly, the classical Fourier heat conduction law was modified by introducing a relaxation time. Secondly, several key factors were considered to establish the thermal model of micro/nano-EDM in single-pulse discharge machining. Subsequently, numerical simulation software was used to solve the thermal model for obtaining the temperature field distribution of the workpiece material and predicting the size of the discharge craters. Finally, the predicting accuracy of the new thermal model was evaluated by comparing the relative error between the simulated values and experimental values. The comparison results show that considering the non-Fourier effect can reduce the average error of the thermal model from 33% to 10%. The non-Fourier effect is more obvious under the shorter discharge time of a single pulse.

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Nhat. « FINITE SIMULATIONS OF MICRO-PARTICLE SUPPORTING FOR SINGLE CELL TRAPPING IN MICROFLUIDIC SYSTEM ». Journal of Military Science and Technology, n^o 67 (12 juin 2020) : 154–60. http://dx.doi.org/10.54939/1859-1043.j.mst.67.2020.154-160.

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Finite element method (FEM) is the most widely used approach in the simulation of micro-nano devices before actual fabrication. Using simulation software, 2D and 3D structures of the device are designed, meshed, and then simulated to optimize their parameters. In this work, we modeled and simulated the hydrodynamic trapping of micro-particle (μP) representing for single-cell in the microfluidic system. Besides, the interaction between μP and fluid, the effect of flow velocity, and the pressure field variation for increasing the trapping efficiency were investigated. Besides, a fully understanding the behavior of micro-particle during the trapping process is exhibited. Based on the achieved results, the optimization of the design will be adjusted as a pre-step before being used for fabrication and experiment. The simulation results are valuable for designing and fabricating the microﬂuidic platform for single-cell research.

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Camarena-Chávez, Victor A., R. Castro-Beltrán, Orlando M. Medina-Cázares, Jonathan U. Álvarez-Martínez, G. Ramos-Ortíz et G. Gutiérrez-Juárez. « Implementation and assessment of a low-cost 3D laser platform controlled by open software for printing polymeric micro-structures ». Journal of Micromechanics and Microengineering 30, n^o 3 (13 février 2020) : 035010. http://dx.doi.org/10.1088/1361-6439/ab6c75.

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Vlasea, Mihaela, Yaser Shanjani, Annabel Bothe, Rita Kandel et Ehsan Toyserkani. « A combined additive manufacturing and micro-syringe deposition technique for realization of bio-ceramic structures with micro-scale channels ». International Journal of Advanced Manufacturing Technology 68, n^o 9-12 (26 février 2013) : 2261–69. http://dx.doi.org/10.1007/s00170-013-4839-7.

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O’Regan, Brian, Fabio Silva, Eoin O’Leidhin, Farah Tahir, Karen Mould, Barry Hayes, Vahid Hosseinnezhad, Ruzanna Chitchyan et Padraig Lyons. « P2P, CSC and TE : A Survey on Hardware, Software and Data ». Energies 14, n^o 13 (26 juin 2021) : 3851. http://dx.doi.org/10.3390/en14133851.

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Peer-to-Peer (P2P), Transactive Energy (TE) and Community Self-Consumption (CSC) are exciting energy generation and use models, offering several opportunities for prosumers, micro-grids and services to the grid; however, they require numerous components to function efficiently. Various hardware devices are required to transmit data and control the generation and consumption equipment, whereas software is needed to use the gathered information to monitor and manage the hardware and energy trading. Data can be gathered from a variety of origins from within the grid and external sources; however, these data must be well-structured and consistent to be useful. This paper sets out to gather information regarding the hardware, software and data from the several archetypes available, focusing on existing projects and trials in these areas to see what the most-common hardware, software and data components are. The result presents a concise overview of the hardware, software and data-related topics and structures within the P2P, TE and CSC energy generation and use models.

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Huang, Xiaoshui, Jian Zhang, Lixin Fan, Qiang Wu et Chun Yuan. « A Systematic Approach for Cross-Source Point Cloud Registration by Preserving Macro and Micro Structures ». IEEE Transactions on Image Processing 26, n^o 7 (juillet 2017) : 3261–76. http://dx.doi.org/10.1109/tip.2017.2695888.

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Nie, Wei Rong, et Wei Dong Ma. « The Simulation Analysis of a Micro Electromagnetic Harvester Based on Vibration Energy ». Applied Mechanics and Materials 300-301 (février 2013) : 207–12. http://dx.doi.org/10.4028/www.scientific.net/amm.300-301.207.

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In order to provide effective power for small aerocraft, this paper offers a design of an electromagnetic vibration energy harvester based on MEMS technology, which works in special launching environment. According to "mass-spring-damper" system theory, this paper firstly built a model of the pick-up system, and discussed the pick-up system's response to sinusoidal input and impact load. Then, an energy conversion system was modeled, in order to analyze the system's power output. ANSYS simulation has been done on the pick-up system of different structures & parameters, and the relationship between different structures & parameters and the energy harvester voltage output has been studied. Based on the theoretical analysis and software simulation, the designed energy harvester working high frequency vibration environment can produce voltage over 200mV, which is enough for micro-sensor, low-power circuit in aerocraft.

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Kirihara, Soshu. « Stereolithographic Additive Manufacturing of Ceramic Components by Using Nanoparticle Paste Feeding ». Materials Science Forum 879 (novembre 2016) : 2485–88. http://dx.doi.org/10.4028/www.scientific.net/msf.879.2485.

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Titania and alumina photonic crystals were fabricated by using stereolithographic additive manufacturing to control electromagnetic waves in terahertz frequency. Micro ceramic patterns were designed spatially by graphic software. Photosensitive liquid resin with ceramic particles were spread onto a grass substrate by mechanical knife edge, and two dimensional (2D) images were drawn using fine pattern exposing to create a cross sectional solid layer. After stacking these layers, the obtained three dimensional (3D) structures of composite precursors are dewaxed and sintered.

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Sellami, Takwa, Hanen Berriri, A. Moumen Darcherif, Sana Jelassi et M. Faouizi Mimouni. « Modal and harmonic analysis of three-dimensional wind turbine models ». Wind Engineering 40, n^o 6 (10 octobre 2016) : 518–27. http://dx.doi.org/10.1177/0309524x16671093.

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In this article, the dynamic responses of wind turbine systems are analytically and numerically investigated. For this purpose, analytic differential equations of motion of wind turbine components subjected to vibration (the blades, the nacelle, and the tower) are solved. This allows determining their dynamic characteristics, mode shapes, and natural frequencies. Two models of two three-dimensional (3D) micro-turbine that are created by the finite element method are set up using the new version of the academic finite element analysis software ANSYS. The first wind turbine is a standard micro three-bladed turbine and the second one is a micro six-bladed Rutland 504. Their natural frequencies and mode shapes are identified based on the modal analysis principle to check the validity of designed models. Dynamic behaviors at several operating conditions of wind turbines are established. Then, spectrum graphs of the structures along x-, y- and z-axis are analyzed.

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Rui, Yan, Aleksandar Subic, Monir Takla, Chun H. Wang, Anja Niehoff, Nina Hamann et Gert Peter Brueggemann. « Biomimetic Design of Lightweight Vehicle Structures Based on Animal Bone Properties ». Advanced Materials Research 633 (janvier 2013) : 3–14. http://dx.doi.org/10.4028/www.scientific.net/amr.633.3.

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This paper presents a comprehensive biomimetic design approach to developing novel load bearing lightweight vehicle structures inspired by the structural properties of animal bones. Lightweight vehicle structures developed in this way would have increased stiffness at significantly reduced weight. In this research, trabecular (cancellous) bone was analyzed at the metaphyses of four different species including rat, rabbit, chicken, and sheep. Three-dimensional models of bone structures were reconstructed from micro-CT scanned images using the computer aided design software Mimics. Force resistance and energy absorption properties of relevant bone structures subjected to quasi-static compression loads were investigated and analysed using the Finite Element (FE) method. Based on the obtained results, the paper discusses the effects of load directions, bone structure allocation and model thickness on the energy absorption and force resistance of the bone structures. The simulation results obtained in this research were compared to the results of conventional vehicle side intrusion bars.

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Mankeekar, Tejas, Dirk Bähre, Dan Durneata, Thomas Hall, Rainer Lilischkis, Harald Natter et Monika Saumer. « Fabrication of micro-structured tools for the production of curved metal surfaces by pulsed electrochemical machining ». International Journal of Advanced Manufacturing Technology 119, n^o 5-6 (30 octobre 2021) : 2825–33. http://dx.doi.org/10.1007/s00170-021-08146-4.

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AbstractA new, scalable process chain for the fabrication of curved micro-structured metallic tools is developed and evaluated. Arrays of arrows, circles, semicircles and rings with final lateral dimensions of 124 to 819 µm are realised on the tools and successfully transmitted in one process step to stainless steel workpieces with a functional area of 6.5 cm2 using pulsed electrochemical machining. Photolithography-etching or micromilling are applied as initial micro-structuring processes, resulting in micro-structured master forms. These forms are copied into reusable silicon forms. This is followed by epoxy casting and electroforming to obtain the final tools. The tools are made of Nickel and have a diameter of 34 mm. Whilst micromilling, photolithography, silicon casting, epoxy casting and electroforming copy the structures very precisely, the wet etching process induces a widening of the dimensions due to the isotropic character of the process. The advantage of the process chain is the reusability of the master as well as of the silicone forms, which can be copied very precisely and easily with scalable processes to get precision tools with relatively large micro-structured areas. The reusability of the forms makes the fabrication of micro-structured tools relatively cost-efficient. The use of photolithography as the initial structuring process enables the generation of arbitrary, user-defined geometries for the micro-structures on the tool surface. The process chain described has the potential to fabricate lateral structure sizes on tools down to one micrometre.

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Hook, G. R., et W. Rasband. « MacMeasure : A low cost, easy-to-operate quantitative morphometrics system for the Macintosh computer ». Proceedings, annual meeting, Electron Microscopy Society of America 45 (août 1987) : 920–21. http://dx.doi.org/10.1017/s0424820100128882.

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We have developed a new software package called MacMeasure for counting and measuring structures in photographs by use of a Macintosh computer and a Micro Digi-Pad digitizing tablet. The length, perimeter and area of structures can be easily measured, sequentially numbered, scaled, mapped and stored on floppy disk. The hardware for the system (Fig. 1) costs under $2000 and MacMeasure is available at no cost from the authors.The intuitive Macintosh point and click paradigm for command selection is used to operate the software. The commands available include Point, Line, Area, Scale, Map and Help (Fig. 2). Point is used to count the number and location of items in the photograph. Line is used to measure the length of lines and Area measures the perimeter and area from which the shape factor F is calculated. The measured line or area is displayed on the Macintosh screen at high magnification after each measurement is made.

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Xu, Hongliang. « Structure determination from X-ray powder diffraction data at low resolution ». Acta Crystallographica Section A Foundations and Advances 70, a1 (5 août 2014) : C143. http://dx.doi.org/10.1107/s2053273314098568.

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Knowledge of the structural arrangement of atoms in solids is necessary to facilitate the study of their properties. The best and most detailed structural information is obtained when the diffraction pattern of a single crystal a few tenths of a millimeter in each dimension is analyzed, but growing high-quality crystals of this size is often difficult, sometimes impossible. However, many crystallization experiments that do not yield single crystals do yield showers of randomly oriented micro-crystals that can be exposed to X-rays simultaneously to produce a powder diffraction pattern. Direct Methods routinely solve crystal structures when single-crystal diffraction data are available at atomic resolution (1.0-1.2Å), but fail to determine micro-crystal structures due to reflections overlapping and low-resolution powder diffraction data. By artificially and intelligently extending the measured data to atomic resolution, we have successfully solved structures having low-resolution diffraction data that were hard to solve by other direct-method based computation procedures. The newly developed method, Powder Shake-and-Bake, is implemented in a computer program PowSnB. PowSnB can be incorporated into the state-of-the-art software package EXPO that includes powder data reduction, structure determination and structure refinement. The new combination could have potential to solve structures that have never been solved before by direct-methods approach.

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Ding, Zhongjun, Zhiliang Feng, Hongyu Li, Dejian Meng, Yi Zhang et Dewei Li. « Experimental Study of Deep Submersible Structure Defect Monitoring Based on Flexible Interdigital Transducer Surface Acoustic Wave Technology ». Sensors 23, n^o 3 (20 janvier 2023) : 1184. http://dx.doi.org/10.3390/s23031184.

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In view of the shortage of structural defect monitoring methods for deep submersibles, numerical simulation and experimental research on underwater SAW propagation based on interdigital transducers are carried out in this paper. PVDF interdigital transducer (PVDF-IDT) has shown considerable potential in the application of structural health monitoring because of its micro size, soft material characteristics, and the characteristics of long-term bonding on the surface of the tested structure. In order to realize the application of IDT on submersible or underwater structures, it is necessary to understand the influence of underwater environment on IDTs with different structures. The underwater attenuation of IDT with 2–5 mm wavelength and the underwater attenuation of Lamb (A0 mode) wave on a 4 mm thick titanium alloy plate is obtained through COMSOL software simulation. The experimental verification shows that the simulation results match with the actual situation, which proves that COMSOL software can accurately calculate the acoustic attenuation of surface waves at the solid–liquid interface. At the same time, the underwater attenuation of IDT with different structures is very different, providing important design parameters for the underwater interdigital transducer. In this paper, it is found that the Lamb wave has significant advantages over the Rayleigh wave in the health monitoring of underwater thin plate structures.

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Jumanov, Isroil I., et Rustam A. Safarov. « Optimization of recognition of micro-objects based on reducing excessive information structures of images ». Journal of Physics : Conference Series 2373, n^o 7 (1 décembre 2022) : 072030. http://dx.doi.org/10.1088/1742-6596/2373/7/072030.

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Abstract Scientific and methodological foundations of identification, recognition, classification of micro-objects using redundant information structures - morphometric, histological, fractal characteristics of images have been developed. Mechanisms for extracting statistical, dynamic, specific characteristics and rarefaction of redundant information structures are proposed. Dynamic models have been developed, combined with the capabilities of neural networks. Computational schemes for preliminary processing of images, texture, segmentation, filtering, approximation, regulation of variable values and optimization have been developed. Methods of recognition and classification of micro-objects with tools for obtaining images from a photo, video camera, digital microscope, interactive measurement, counting, structure determination, statistical analysis, isolation and segmentation, and the formation of informative (reference) points of image contours have been investigated. The traditional computational schemes of a multilayer neural network, a Kohonen neural network, and a radial-basic network are investigated. Modified algorithms for training a network with mechanisms for adjusting the values of variables, monitoring errors along the boundaries of permissible values, accounting for stationary, quasi-stationary and non-stationary behavior of image points during the formation of training samples have been developed. Generalized algorithms for the identification of images of pollen grains are proposed. The efficiency of the algorithms was investigated according to the criteria of the root mean square error and the speed of information processing. A software package for visualization, recognition, classification of images of pollen grains has been developed, the implementations of which have been tested taking into account the conditions of a priori insufficiency, uncertainty and nonstationarity of processes.

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Liou, A. C., et R. H. Chen. « Injection molding of polymer micro- and sub-micron structures with high-aspect ratios ». International Journal of Advanced Manufacturing Technology 28, n^o 11-12 (21 septembre 2005) : 1097–103. http://dx.doi.org/10.1007/s00170-004-2455-2.

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Obilor, Amarachi F., Manuela Pacella, Andy Wilson et Vadim V. Silberschmidt. « Micro-texturing of polymer surfaces using lasers : a review ». International Journal of Advanced Manufacturing Technology 120, n^o 1-2 (11 février 2022) : 103–35. http://dx.doi.org/10.1007/s00170-022-08731-1.

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AbstractMicro- and nanoscale structures produced on surfaces of metals, polymers, ceramics, and glasses have many important applications in different fields such as engineering, medical, biological, etc. Laser ablation using ultrashort pulses has become the prominent technique for generating different surface structures for various functional applications. Ultrashort laser ablation proved to be ideal for producing structures with dimensions down to the nanometre scale. In comparison to other texturing techniques employed to create micro/nano features such as electrochemical machining, micro-milling, ion-beam etching, hot embossing, lithography, and mechanical texturing, ultrashort laser ablation produces high-quality surfaces at low cost in a one-step non-contact process. Advantageous characteristics of polymers such as high strength-to-weight ratio, non-corrosive nature, and high electrical and thermal resistance, have made polymers the preferred choice compared to other materials (e.g., steel, aluminium, titanium) in several fields of application. As a result, laser ablation of polymers has been of great interest for many researchers. This paper reviews the current state-of-the art research and recent progress in laser ablation of polymers starting from laser-material interaction, polymer properties influenced by laser, laser texturing methods, and achievable surface functionalities such as adhesion, friction, self-cleaning, and hydrophilicity on commonly used polymeric materials. It also highlights the capabilities and drawbacks of various micro-texturing techniques while identifying texture geometries that can be generated with these techniques. In general, the objective of this work is to present a thorough review on laser ablation and laser surface modification of a variety of industrially used polymers. Since direct laser interference patterning is an emerging area, considerable attention is given to this technique with the aim of forming a basis for follow-up research that could pave the way for potential technological ideas and optimization towards obtaining complex high-resolution features for future novel applications.

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Sun, Shu Feng. « Fabrication Technology of Involute Micro Gear Based on Two-Photon of Femtosecond Laser ». Applied Mechanics and Materials 44-47 (décembre 2010) : 670–74. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.670.

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Microfabrication is a kind of critical technology for the development of Micro Electro-Mechanical Systems (MEMS). The frequently-used microfabrication technologies are electric discharge machining, photoetching, LIGA and laser fabrication, et al. Micro structures may be fabricated by these technologies. The polymerization principle of two-photon of femtosecond laser is different from that of single-photon. Photoinitiator of photosensing material absorbs two photons simultaneously to accomplish energy level transition and to induce the material to occur photochemical reaction. For the material absorbing two photons, the energy of each photon is equivalent to half of the energy that needed by the material transiting from ground state to excited state. It is also equal to half of the energy needed by the material occurring single-photon absorption. Therefore, the photonic frequency of two-photon excitation light source is half of the single-photon light source. According to two-photon fabrication principle, machining system of two-photon of femtosecond laser is set up. Which includes light path transmission equipment, three dimensional micro displacement scanning stage and control software, et al. Involute micro gear is fabricated by two-photon of femtosecond laser generated by the system.

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Martínez Sánchez, Cuautli Exal. « Estrategias del arte participativo : Entre la micro-política y el software social ». AUSART 4, n^o 1 (12 juillet 2016) : 207–16. http://dx.doi.org/10.1387/ausart.16704.

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La hibridación de las tecnologías digitales con la totalidad de las actividades humanas ha desencadenado una transformación irreversible en múltiples aspectos de nuestra vida cotidiana pero sobre todo, en los procesos de construcción sociocultural; Lo efímero, híbrido, virtual, interactivo, heterogéneo, son ejes entorno a los cuales construimos nuevas relaciones sociales. Material de análisis y reflexión para el desarrollo de las prácticas artísticas contemporáneas. En este sentido, las estrategias participativas impulsadas desde las prácticas artísticas desarrollan estructuras de relación, espacios de encuentro, diálogo y autoproducción colectiva. Podríamos afirmar que exploran el campo de las relaciones sociales (la conectividad social) y sus potenciales expresivos, narrativos, políticos, poéticos, estéticos, etc. Este artículo propone un análisis de las estrategias artísticas participativas como herramientas híbridas e interdisciplinares que propician a través de nuevas metodologías de investigación, la reflexión sobre nuevos modos de producir subjetividad y visualidad, producción social y emancipación cultural.Palabras Clave: ARTE PARTICIPATIVO; SOFTWARE SOCIAL;TECNOLOGÍAS BLANDAS; ARTIVISMO; ESTRATEGIAS MICROPOLÍTICAS Strategies of participatory art : Between micro- policy and social softwareAbstractHybridization of digital technologies with all human activities has triggered an irreversible transformation in many aspects of our daily lives but especially in sociocultural construction processes; ephemeral, hybridity, virtuality, interactivity, heterogenity, disruptiveness, are axes around which we build new social relations. Matter of analysis and reflection in the developing of contemporary art practices. In this sense, participatory strategies promoted by artistic practices develop relationship structures, spaces for encounter, dialogue, common action and collective self-production. We could say that these artistic practices explore the field of social relations (social entanglement and engagement) and their expressive, narrative, politic, poetic or aesthetic, potentials. This article proposes an analysis of participatory artistic strategies as hybrid and interdisciplinary tools that lead through new research methodologies to new ways of producing subjectivity and visuality, social production and cultural emancipation.Keywords: PARTICIPATORY ART; SOCIAL SOFTWARE; SOFT TECHNOLOGIES; MICROPOLITIC STRATEGIES

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Zhang, Jingran, Tianqi Jia, Yongda Yan, Li Wang, Peng Miao, Yimin Han, Xinming Zhang et al. « Label-free highly sensitive probe detection with novel hierarchical SERS substrates fabricated by nanoindentation and chemical reaction methods ». Beilstein Journal of Nanotechnology 10 (13 décembre 2019) : 2483–96. http://dx.doi.org/10.3762/bjnano.10.239.

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Nanostructures have been widely employed in surface-enhanced Raman scattering (SERS) substrates. Recently, in order to obtain a higher enhancement factor at a lower detection limit, hierarchical structures, including nanostructures and nanoparticles, appear to be viable SERS substrate candidates. Here we describe a novel method integrating the nanoindentation process and chemical redox reaction to machine a hierarchical SERS substrate. The micro/nanostructures are first formed on a Cu(110) plane and then Ag nanoparticles are generated on the structured copper surface. The effect of the indentation process parameters and the corrosion time in the AgNO3 solution on the Raman intensities of the SERS substrate with hierarchical structures are experimentally studied. The intensity and distribution of the electric field of single and multiple Ag nanoparticles on the surface of a plane and with multiple micro/nanostructures are studied with COMSOL software. The feasibility of the hierarchical SERS substrate is verified using R6G molecules. Finally, the enhancement factor using malachite green molecules was found to reach 5.089 × 109, which demonstrates that the production method is a simple, reproducible and low-cost method for machining a highly sensitive, hierarchical SERS substrate.

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Takemoto, Mitsuru, Shunsuke Fujibayashi, B. Otsuki, Tomiharu Matsushita, Tadashi Kokubo et Takashi Nakamura. « 3-D Analysis of Pore Structure of Porous Biomaterials Using Micro Focus X-Ray Computed Tomography ». Key Engineering Materials 309-311 (mai 2006) : 1095–98. http://dx.doi.org/10.4028/www.scientific.net/kem.309-311.1095.

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Generally, characterizations of pore structures of porous biomaterials are mainly based on 2-dimensional (2-D) analysis using cross sectional micrographs. However, interconnectivity of each pore may be more important factor, when tissue ingrowth into deeper pores is considered. In this paper, using micro-CT imaging with 3-D image processing software, analyses of porous material based on 3-demensional (3-D) geometrical considerations were successfully performed. Plasmasprayed porous titanium implant (PT) and four types of sintered porous titanium implants (ST50- 200, ST50-500, ST70-200, and ST70-500) that possess different porosities (50% and 70%) and pore sizes (200-500+m and 500-1500+m) were analyzed in this study. A micro focus X-ray computed tomography system was employed to acquire microstructural information from the porous implants. Using 3-D image processing software, we performed three types of 3-D analysis including detection of the dead space (% dead pore), analysis of interconnectivity by blocking the narrow pore throat with caliber less than 52 +m (% pore with narrow throat) and analysis of material construct by contracting thin strut with thickness less than 52 +m (% construct with thin strut). ST50S and ST50L possessed interconnected porous structure with thicker strut; however, pore throat was considered to be relatively narrow. On the other hand, PT implant possesses favorable interconnectivity despite its’ low porosity; however, relatively thin strut indicate the structural disadvantage for mechanical property. These results suggest that the 3-D analysis of pore and strut structure using micro focus X-ray computed tomography and 3-D image processing software will provide effective information to develop porous implant.

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Bhatti, Ijaz Asghar, Sahar Mustafa et Musarrat Azher. « Genre Analysis of Research Article Abstracts in Linguistics and Literature : A Cross Disciplinary Study ». International Journal of English Linguistics 9, n^o 4 (12 juin 2019) : 42. http://dx.doi.org/10.5539/ijel.v9n4p42.

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The importance of an abstract in a research article has turned the focus of linguistics on Genre analysis of abstract articles. Taking into consideration this immensely researched topic, this paper aims to investigate the macro and micro structures in the Linguistics and Literature Abstracts. In the previous researches, this very comparison is never addressed by the researches, hence the present research aims to fill this gap. The corpus contained 40 abstracts, 20 of linguistics and 20 of literature from International Journal of Applied Linguistics & English Literature (IJALEL). The macro analysis was made according to the Create a Research Space (CARS) model by Swales (2004) and Ant mover software was used to analyze the corpus, while the micro analysis followed Swales and Feak (2009). The results showed that there is no significant difference between the linguistics and literature abstracts at the macro level while the differences lie at the micro level. This study will be beneficial for the novice researchers as it provides a framework of analyzing two interconnected disciplines.

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Coquelle, Nicolas, Aaron S. Brewster, Ulrike Kapp, Anastasya Shilova, Britta Weinhausen, Manfred Burghammer et Jacques-Philippe Colletier. « Raster-scanning serial protein crystallography using micro- and nano-focused synchrotron beams ». Acta Crystallographica Section D Biological Crystallography 71, n^o 5 (25 avril 2015) : 1184–96. http://dx.doi.org/10.1107/s1399004715004514.

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High-resolution structural information was obtained from lysozyme microcrystals (20 µm in the largest dimension) using raster-scanning serial protein crystallography on micro- and nano-focused beamlines at the ESRF. Data were collected at room temperature (RT) from crystals sandwiched between two silicon nitride wafers, thereby preventing their drying, while limiting background scattering and sample consumption. In order to identify crystal hits, new multi-processing and GUI-driven Python-based pre-analysis software was developed, namedNanoPeakCell, that was able to read data from a variety of crystallographic image formats. Further data processing was carried out usingCrystFEL, and the resultant structures were refined to 1.7 Å resolution. The data demonstrate the feasibility of RT raster-scanning serial micro- and nano-protein crystallography at synchrotrons and validate it as an alternative approach for the collection of high-resolution structural data from micro-sized crystals. Advantages of the proposed approach are its thriftiness, its handling-free nature, the reduced amount of sample required, the adjustable hit rate, the high indexing rate and the minimization of background scattering.

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Meng, Xiang Bao, Lei Wang et Zi Jian Pan. « Parametric Modeling of Transition Tube with Constant Section Area along Straight, Circular and Oblique Central Route on CATIA ». Advanced Materials Research 619 (décembre 2012) : 18–21. http://dx.doi.org/10.4028/www.scientific.net/amr.619.18.

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Parametric modeling of transition tubes were implemented based on constant cross section area assumption along the main central routes on CATIA software. The key objective of modeling these similar structures is to provide more geometric configuration options and modifications of micro channels for multi phase flow systems. The modeling processes were parameterized and analyzed by CATIA “Generative Shape Design” module with the help of “Parameters” and “Relations” functions. The surface models are all designed in circular cross sections that are constrained in two ways: one is perpendicular to the main central routes of the tube for planar transitional junction, and another is, perpendicular to the sub-branch central routes for oblique transitional junction three dimensionally. Next work is emphasized on numerical simulation and experimental investigation with these geometric structures in a multi phase flow system.

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Zhang, Xinlei, Ni Chen, Jinming Wu, Jiawei Wei, Bo Yan, Liang Li et Ning He. « Study on the burr formation process in micro-milling of high aspect ratio structures ». International Journal of Advanced Manufacturing Technology 115, n^o 1-2 (10 mai 2021) : 433–47. http://dx.doi.org/10.1007/s00170-021-07203-2.

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