Journal articles: 'Interface mesh'

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Liu, Fu Mei, and Wen Liang Qu. "Research and Implementation of Multiple Interfaces Wireless Mesh Network Routing Protocol." Applied Mechanics and Materials 687-691 (November 2014): 2744–47. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.2744.

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In this paper, routing protocols of wireless Meshnet work is studied about implmentation and verification them on platform. Fistly, routing algorithm of a single-interface Mesh network is studied about implementation routing protocols. This Mesh platform can provid us with wireless aceess, video surveillance and some other services. Experiments results demonstrate that the path throughout will deerease rapidly as the number of Hops increases. Because in a single interface Mesh network, all links are working on the same interfaee, which causes serious interference.

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Wicaksono, Arief Ikhwan, Rama Sahtyawan, and Agung Priyanto. "Komparasi Analisa Kinerja Mesh Interface Dan Bridge Interface Pada Wireless WDS Mesh Network." JISKA (Jurnal Informatika Sunan Kalijaga) 5, no. 1 (May 19, 2020): 36. http://dx.doi.org/10.14421/jiska.2020.51-05.

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Wireless mesh networking provides a solution to the problem of network distribution that has been constrained by cable networks and wireless networks that are not directly related to other wireless networks. Some of the advantages of wireless mesh technology include extended coverages, robustness, self-configuration, easy maintenance, and low cost. Based on the problems described in the previous paragraph, this research will analyze the performance of two wireless mesh distribution methods using several topology scenarios which will later be considered to affect the quality of network distribution WDS Mesh distribution methods that will be compared in this study are WDS Mesh with Mesh Interface, and WDS Mesh with Bridge Interface. Evaluation of the two methods will be conducted periodically to get the results of the analysis which will be used to do re-configuring to maximize the features and advantages of mesh technology in maintaining reliable network quality.

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Li, Bo, and John Shopple. "An Interface-Fitted Finite Element Level Set Method with Application to Solidification and Solvation." Communications in Computational Physics 10, no. 1 (July 2011): 32–56. http://dx.doi.org/10.4208/cicp.230510.240910a.

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AbstractA new finite element level set method is developed to simulate the interface motion. The normal velocity of the moving interface can depend on both the local geometry, such as the curvature, and the external force such as that due to the flux from both sides of the interface of a material whose concentration is governed by a diffusion equation. The key idea of the method is to use an interface-fitted finite element mesh. Such an approximation of the interface allows an accurate calculation of the solution to the diffusion equation. The interface-fitted mesh is constructed from a base mesh, a uniform finite element mesh, at each time step to explicitly locate the interface and separate regions defined by the interface. Several new level set techniques are developed in the framework of finite element methods. These include a simple finite element method for approximating the curvature, a new method for the extension of normal velocity, and a finite element least-squares method for the reinitialization of level set functions. Application of the method to the classical solidification problem captures the dendrites. The method is also applied to the molecular solvation to determine optimal solute-solvent interfaces of solvation systems.

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Alrayes, Mohammad Meftah, Sanjay Kumar Biswash, Neeraj Tyagi, Rajeev Tripathi, Arun Kumar Misra, and Sanjeev Jain. "An Enhancement of AODV with Multi-Radio in Hybrid Wireless Mesh Network." ISRN Electronics 2013 (September 3, 2013): 1–13. http://dx.doi.org/10.1155/2013/925176.

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AODV-MR (on-demand routing protocol with multi-radio extension) has been designed to support multi-radio interfaces; it uses more than one interface of the same mesh router or gateways for broadcasting duplicated control packets (i.e., RREQ, RRER, and HELLO message) or to rebroadcast it. We have modified AODV-MR, by allocating one interface in a dynamic manner for sending routing/control packets or data packets. This allocation of interfaces is based on type of mesh routers and traffic direction. The efficiency and effectiveness of the modification work have been evaluated compared with AODV-MR in terms of packet delivery ratio, routing packet overhead, end to end delay, and throughput.

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Hu, Yuhui, Juan Lin, Baoquan Zhao, Shujin Lin, and Xiaonan Luo. "A Ridge-Lines-Based Interface for Triangle Mesh Deforming." International Journal of Computer Theory and Engineering 6, no. 3 (2014): 206–9. http://dx.doi.org/10.7763/ijcte.2014.v6.863.

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TAN, V. B. C., and T. BELYTSCHKO. "BLENDED MESH METHODS FOR FLUID-STRUCTURE INTERACTION." International Journal of Computational Methods 01, no. 02 (September 2004): 387–406. http://dx.doi.org/10.1142/s0219876204000186.

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In many cases, it is advantageous to discretize a domain using several finite element meshes instead of a single mesh. For example, in fluid-structure interaction problems, an Eulerian mesh is advantageous for the fluid domain while a Lagrangian mesh is most suited for the structure. However, the interface conditions between different types of meshes often lead to significant errors. A method of treating different meshes by smoothly varying the description from Lagrangian to Eulerian in an interface or blending domain is presented. A Lagrangian mesh is used for the structure while two different types of mesh are used for the fluid. Arbitrary Lagrangian-Eulerian (ALE) meshes are used in the regions of the fluid-structure interfaces while Eulerian meshes are used for the remainder of the fluid domain. A blending function is used to couple the ALE and Eulerian meshes to ensure a smooth transition from one mesh to another. The method is tested on two fluid-structure problems — flow past a hinged plate, and fluid expansion in a closed container. Results are in good agreement with standard finite element and analytical solutions.

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Chessa, J., and T. Belytschko. "An Extended Finite Element Method for Two-Phase Fluids." Journal of Applied Mechanics 70, no. 1 (January 1, 2003): 10–17. http://dx.doi.org/10.1115/1.1526599.

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An extended finite element method with arbitrary interior discontinuous gradients is applied to two-phase immiscible flow problems. The discontinuity in the derivative of the velocity field is introduced by an enrichment with an extended basis whose gradient is discontinuous across the interface. Therefore, the finite element approximation can capture the discontinuities at the interface without requiring the mesh to conform to the interface, eliminating the need for remeshing. The equations for incompressible flow are solved by a fractional step method where the advection terms are stabilized by a characteristic Galerkin method. The phase interfaces are tracked by level set functions which are discretized by the same finite element mesh and are updated via a stabilized conservation law. The method is demonstrated in several examples.

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Afzal, Zaeem. "A graphical interface for changing MeSH." ACM SIGBIO Newsletter 8, no. 4 (December 1986): 50–53. http://dx.doi.org/10.1145/951452.951456.

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Zhong, Zhi Peng, and Shui Wan. "Composite Grid Method on Computation of Stress Intensity Factors of Biomaterial Interface Crack." Applied Mechanics and Materials 105-107 (September 2011): 1591–96. http://dx.doi.org/10.4028/www.scientific.net/amm.105-107.1591.

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The stress intensity factors (SIFs) of biomaterial interface crack were analyzed using the Composite Grid Method (CGM). Two different scale grids were adopted: a coarse mesh for the whole area without considering interface crack and a fine mesh for the local singular area considering the impact of interface crack. It solved the global coarse mesh problem and the local fine mesh problem iteratively and obtained the final results. The calculation was carried out by CGM but without the demand of dense mesh near the crack tip and special crack tip elements compared with other methods. The numerical extrapolation method of determining the SIFs to avoid the oscillation singularity of asymptotic fields of elastic interface crack. Reasonable agreement was achieved and efficiency of CGM for such kind of problem was displayed.

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Gao, Wenhui, Yuliang Lin, Xin Wang, Tianya Zhou, and Chaoxu Zheng. "Interface Mechanics of Double-Twisted Hexagonal Gabion Mesh with Coarse-Grained Filler Based on Pullout Test." Materials 17, no. 1 (December 28, 2023): 164. http://dx.doi.org/10.3390/ma17010164.

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The interface friction mechanics of reinforcement material with filler is an essential issue for the engineering design of reinforced soil structure. The interface friction mechanics is closely associated with the properties of filler and reinforcement material, which subsequently affects the overall stability. In order to investigate the interface mechanism of a double-twisted hexagonal gabion mesh with a coarse-grained filler derived from a weathered red sandstone, a large laboratory pullout test was carried out. The pullout force–displacement curve was obtained by fully mobilizing the gabion mesh to reach the peak shear stress at the interface between the gabion mesh and the coarse-grained filler. The change of force–displacement characteristics and the distribution of tensile stress in gabion mesh during the pullout process were obtained. A 3D numerical model was established based on the pullout test model, and the model for analyzing the interface characteristic between the gabion mesh and the coarse-grained filler was modeled using the FLAC3D 6.0 platform. The interface characteristics were further analyzed in terms of the displacement of soil, the displacement of reinforcement, and the shear stress of soil. The strength and deformation behaviors of the interface during the entire pullout process were well captured. The pullout force–displacement curve experiences a rapid growth stage, a development transition stage and a yielding stabilization stage. The critical displacement corresponding to peak pullout stress increases with the increase in normal stress. The normal stress determines the magnitude of shear stress at the reinforcement and soil interface, and the displacement distribution of a gabion mesh is not significantly affected by normal stress when the applied normal stress is within a range of 7–20 kPa. The findings are beneficial to engineering design and application of a gabion mesh-reinforced soil structure.

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QUAN, SHAOPING, DAVID P. SCHMIDT, JINSONG HUA, and JING LOU. "A numerical study of the relaxation and breakup of an elongated drop in a viscous liquid." Journal of Fluid Mechanics 640 (October 29, 2009): 235–64. http://dx.doi.org/10.1017/s0022112009991339.

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The relaxation and breakup of an elongated droplet in a viscous and initially quiescent fluid is studied by solving the full Navier–Stokes equations using a three-dimensional finite volume method coupled with a moving mesh interface tracking (MMIT) scheme to locate the interface. The two fluids are assumed incompressible and immiscible. The interface is represented as a surface triangle mesh with zero thickness that moves with the fluid. Therefore, the jump and continuity conditions across the interface are implemented directly, without any smoothing of the fluid properties. Mesh adaptations on a tetrahedral mesh are employed to permit large deformation and to capture the changing curvature. Mesh separation is implemented to allow pinch-off. The detailed investigations of the relaxation and breakup process are presented in a more general flow regime compared to the previous works by Stone & Leal (J. Fluid Mech., vol. 198, 1989, p. 399) and Tong & Wang (Phys. Fluids, vol. 19, 2007, 092101), including the flow field of the both phases. The simulation results reveal that the vortex rings due to the interface motion and the conservation of mass play an important role in the relaxation and pinch-off process. The vortex rings are created and collapsed during the process. The effects of viscosity ratio, density ratio and length ratio on the relaxation and breakup are studied. The simulations indicate that the fluid velocity field and the neck shape are distinctly different for viscosity ratios larger and smaller than O(1), and thus a different end-pinching mechanism is observed for each regime. The length ratio also significantly affects the relaxation process and the velocity distributions, but not the neck shape. The influence of the density ratio on the relaxation and breakup process is minimal. However, the droplet evolution is retarded due to the large density of the suspending flow. The formation of a satellite droplet is observed, and the volume of the satellite droplet depends strongly on the length ratio and the viscosity ratio.

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Nguyen Minh, Quy, Ban Nguyen Tien, and Quy Vu Khanh. "Improved Multi-Channel Multi-Interface Routing Protocol for Wireless Mesh Networks." International Journal of Interactive Mobile Technologies (iJIM) 16, no. 11 (June 7, 2022): 136–48. http://dx.doi.org/10.3991/ijim.v16i11.29433.

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In recent years, Wireless Mesh Networks (WMN) are emerging as a potential technology to enhance the ability and availability of wireless networks. WMN consists of wireless mesh routers and terminals connected by wireless multi-hop communication. Besides, in WMN, each wireless node owns many interfaces, and each interface operates on many channels. However, effectively using multiple orthogonal channels and multiple interfaces to increase the performance of WMN and decrease the radio link transmission interference is of significant challenge. In this paper, we consider routing issues in WMN. Then, we proposed an on-demand routing protocol, adaptive multi-channel multi-interface operation, improved from the AODV protocol. This protocol is capable of effectively managing communication in the WMN and limited effects of co-channel interference. The simulation results on NS2 show that our proposed protocol improves throughput, delay and packet delivery rate compared to existing traditional protocols.

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Tian, Qi Ming, and Hao Yu Meng. "Analysis and Comparison of Routing Metrics for Multi-Interface Wireless Mesh Networks." Advanced Materials Research 268-270 (July 2011): 1856–61. http://dx.doi.org/10.4028/www.scientific.net/amr.268-270.1856.

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The development of wireless broadband access in multimedia field has a higher requirement on wireless mesh networks’ performance. The design of routing metric is the key to improve the performance of wireless mesh networks. How to make full use of multi-interface technology in routing metric design to improve the network capacity has become a research focus. This article first analyzes the requirements of multi-interface wireless mesh networks on routing metric design, then analyzes strengths and weaknesses of nine routing metrics applied in wireless mesh networks currently, and finally compares the conditions of nine routing metrics capturing different performance indicators of wireless networks. As routing metrics like WCETT, MIC, WCETT-LB, IAWARE, ILA, MI and IDA all take channel interference problems into account, they are more suitable for multi-interface wireless mesh networks.

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Feng, Xiao Long, Zhi Yan Zhou, Lu Wang, and Zhong Kuo Zhou. "Remote Wireless Monitoring System for Heading Face of Coal Mine Based on WMN." Applied Mechanics and Materials 195-196 (August 2012): 951–55. http://dx.doi.org/10.4028/www.scientific.net/amm.195-196.951.

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t is necessary to establish a remote wireless monitoring system for the heading face of coal mine because of the risk of gas outburst and water inrush. This paper introduced a remote wireless monitoring system for heading face of coal mine based on wireless mesh network. The key technology is that the wireless backhaul link of this wireless communication system must remain high bandwidth and low latency after multi-hop in order to support video transmission because the laneway of coal mine is narrow and long. We used the technology of multi-interface multi-channel to design a 2-interface 3-channel backbone network for this wireless communication system. Each node of this backbone network is equipped with two interfaces, and three orthogonal channels of channel 1,6,11 provided by 802.11b/g are used. Compared to single interface single channel chain network, the 2-interface 3-channel wireless mesh backbone network has high throughput and low end to end delay while using appropriate channel allocation algorithm to make the channels of adjacent links non-interfered.

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Mojzeszko, M., K. Perzynski, L. Madej, and J. Majta. "Multi-scale modelling of deformation heterogeneities in explosively welded layered sheets." IOP Conference Series: Materials Science and Engineering 1270, no. 1 (December 1, 2022): 012088. http://dx.doi.org/10.1088/1757-899x/1270/1/012088.

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A multi-scale numerical investigation of local heterogeneities in the strain and stress fields occurring during forming of explosively welded layered metallic sheets is the main goal of the research. Explosive welding is a complex process involving various phenomena occurring in materials during an impact at high velocities and pressures, especially at the interfaces of colliding metals. As a result, the interface of the layered metallic sheets is often highly heterogeneous at the microscale level, what directly affects the sheet behaviour under subsequent forming conditions. To investigate this issue, the mesh-free numerical model of the explosive welding process is used first to recreate the characteristic features of the interface morphology. Various detonation velocities are used to provide diversified morphological features at the interface. Obtained results are then used as input data to develop the concurrent multi-scale finite element model of material behaviour under deformation conditions. The multi-scale modelling concept with explicit representation of the interface region is used. The highly refined heterogeneous FE mesh was generated in the interface region to capture local heterogeneities occurring at the microscale. Particular attention is put on numerical investigation of an influence of interface morphology in the welding zone on the development of the stress localisation that may directly lead to fracture initiation during forming.

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ZHENG, H. W., X. J. LI, G. W. YANG, and C. SHU. "INTERACTION OF SHOCK WAVE WITH MULTI-FLUIDS INTERFACE USING QUADRILATERAL-BASED ADAPTIVE MESH." International Journal of Modern Physics C 23, no. 05 (May 2012): 1250033. http://dx.doi.org/10.1142/s0129183112500337.

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In this paper, the interaction of shock waves with multi-fluids interfaces is investigated by numerical simulations using unstructured quadrilateral adaptive meshes. In order to obtain a detailed structure of the interface, a solution adaptive method for compressible multi-fluid flows developed by Zheng et al. is employed. Firstly, the method is verified by a planar shock and interface interaction problem, which is compared with the front tracking method for the Richtmyer–Meshkov instability problem. Following the verification, the interaction between a circular shock and a sinusoidally perturbed circular interface in cylinder vessel is firstly investigated in our paper. The results show that the solution adaptive method can be employed to study the compressible multi-fluid cases with relatively complex geometry as well as capturing the fine details of interfacial structures of the interaction.

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Cao, Shuhao, Long Chen, and Ruchi Guo. "A virtual finite element method for two-dimensional Maxwell interface problems with a background unfitted mesh." Mathematical Models and Methods in Applied Sciences 31, no. 14 (December 24, 2021): 2907–36. http://dx.doi.org/10.1142/s0218202521500652.

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A virtual element method (VEM) with the first-order optimal convergence order is developed for solving two-dimensional Maxwell interface problems on a special class of polygonal meshes that are cut by the interface from a background unfitted mesh. A novel virtual space is introduced on a virtual triangulation of the polygonal mesh satisfying a maximum angle condition, which shares exactly the same degrees of freedom as the usual [Formula: see text]-conforming virtual space. This new virtual space serves as the key to prove that the optimal error bounds of the VEM are independent of high aspect ratio of the possible anisotropic polygonal mesh near the interface.

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Kim, H. G., I. R. Grosse, and S. V. Nair. "Finite Element Mesh Refinement for Discontinuous Fiber Reinforced Composites." Journal of Engineering Materials and Technology 116, no. 4 (October 1, 1994): 524–32. http://dx.doi.org/10.1115/1.2904323.

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This paper is concerned with the development of a generalized approach for mesh refinement in a short fiber reinforced composite. Mesh refinement procedures are based on the calculation of the error in energy norm for global convergence and the traction differential approach at the fiber/matrix interface for local convergence. The mesh refinement strategy is based on the use of elongated elements at the fiber/matrix interface, yielding significantly different mesh patterns than obtained by conventional mesh refinement approaches. This difference may have a critical bearing on the subsequent thermo-mechanical properties predicted by finite element analysis (FEA). It is found that the use of elongated (i.e., high aspect ratio) elements for mesh refinement results in a much more rapid computational convergence rate than obtained by conventional meshes. Converged local solutions are obtained with significantly less degrees-of-freedom (DOF) than by conventional mesh refinement methods.

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Wang, Liqun, Songming Hou, and Liwei Shi. "A Numerical Method for Solving Elliptic Interface Problems Using Petrov-Galerkin Formulation with Adaptive Refinement." Mathematical Problems in Engineering 2018 (September 10, 2018): 1–12. http://dx.doi.org/10.1155/2018/3721258.

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Elliptic interface problems have wide applications in engineering and science. Non-body-fitted grid has the advantage of saving the cost of mesh generation. In this paper, we propose a Petrov-Galerkin formulation using non-body-fitted grid for solving elliptic interface problems. In this method, adaptive mesh refinement is employed for cells with large errors. The new mesh still has all triangles being right triangles of the same shape. Numerical experiments show side-by-side comparison that to obtain the same accuracy, our new method has much less overall CPU time compared with the previous method even with some cost on mesh generation.

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Liu, Zhi Lin, and Yong Huang. "Comparison of the Interface-Capturing Behavior between LSM and MCLS." Key Engineering Materials 730 (February 2017): 533–40. http://dx.doi.org/10.4028/www.scientific.net/kem.730.533.

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Numerical simulation of the moving interface is widely investigated in the fields of two-phase flow, crystal growth, molten metal casting and so on. To simulate accurately and quickly motion state of the moving interface, two types of interface-capturing method, LSM (level set method) and MCLS (mass-conserving LSM coupled with VOF (volume of fluid)), were comparatively analysed and studied. Two kinds of moving interface, rotation motion of Zaleska slotted disk interface and shearing deformation of the circle interface, were simulated. The level set advection equation was solved with IATVD (the characteristic integral-averaging finite volume method), RK-WENO (the third order Runge-Kutta method with WENO (weighted essentially non-oscillatory)), or the low order method, respectively. The level set function was re-initialized with modified Godunov method. Computation was implemented in different size mesh. When it is independent with mesh size, results show that the high order method, IATVD and RK-WENO, can get higher computing accuracy in LSM without topological geometry change. But computing time cost of RK-WENO is much greater than that of IATVD. For the low order method, LSM captures the moving interface in bad, however, MCLS’s numerical result is very good. But computing time cost of MCLS is much and much greater than that of LSM. For interface-capturing with topological geometry change, these two high order methods all can not capture the moving interface in good in LSM. Nevertheless, the resulting interfaces all are same as original interface in MCLS. These indicate that an appropriate numerical method and interface-capturing method can be chosen to accurately and quickly capture the related moving interface.

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Barolli, Admir, and Shinji Sakamoto. "A web interface for WMN-PSODGA hybrid intelligent simulation system: performance evaluation for different mesh client distributions." International Journal of Web Information Systems 18, no. 1 (December 7, 2021): 41–54. http://dx.doi.org/10.1108/ijwis-11-2021-0120.

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Purpose The purpose of this paper is to implement a web interface for a hybrid intelligent system. By using the implemented web interface, one can find optimal assignments of mesh routers in wireless mesh networks (WMNs). This study evaluates the implemented system considering three distributions of mesh clients to solve the node placement problem in WMNs. Design/methodology/approach The node placement problem in WMNs is well known to be a computationally hard problem. Therefore, intelligent algorithms are used for solving this problem. The implemented system is a hybrid intelligent system based on meta-heuristics algorithms: particle swarm optimization (PSO) and distributed genetic algorithm (DGA). The proposed system is called WMN-PSODGA. Findings This study carried out simulations using the implemented simulation system. From the simulations results, it was found that the WMN-PSODGA system performs better for chi-square distribution of mesh clients compared with Weibull and exponential distributions. Research limitations/implications For simulations, three different distributions of mesh clients were considered. In the future, other mesh client distributions, number of mesh nodes and communication distance need to be considered. Originality/value This research work, different from other research works, implemented a hybrid intelligent simulation system for WMNs. This study also implemented a web interface for the proposed system, which make the simulation system user-friendly.

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Li, Zhilin, and Peng Song. "An Adaptive Mesh Refinement Strategy for Immersed Boundary/Interface Methods." Communications in Computational Physics 12, no. 2 (August 2012): 515–27. http://dx.doi.org/10.4208/cicp.070211.150811s.

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AbstractAn adaptive mesh refinement strategy is proposed in this paper for the Immersed Boundary and Immersed Interface methods for two-dimensional elliptic interface problems involving singular sources. The interface is represented by the zero level set of a Lipschitz function ϕ(x,y). Our adaptive mesh refinement is done within a small tube of |ϕ(x,y)|≤δ with finer Cartesian meshes. The discrete linear system of equations is solved by a multigrid solver. The AMR methods could obtain solutions with accuracy that is similar to those on a uniform fine grid by distributing the mesh more economically, therefore, reduce the size of the linear system of the equations. Numerical examples presented show the efficiency of the grid refinement strategy.

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Burman, Erik, Peter Hansbo, and Mats G. Larson. "A cut finite element method for a model of pressure in fractured media." Numerische Mathematik 146, no. 4 (October 31, 2020): 783–818. http://dx.doi.org/10.1007/s00211-020-01157-5.

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AbstractWe develop a robust cut finite element method for a model of diffusion in fractured media consisting of a bulk domain with embedded cracks. The crack has its own pressure field and can cut through the bulk mesh in a very general fashion. Starting from a common background bulk mesh, that covers the domain, finite element spaces are constructed for the interface and bulk subdomains leading to efficient computations of the coupling terms. The crack pressure field also uses the bulk mesh for its representation. The interface conditions are a generalized form of conditions of Robin type previously considered in the literature which allows the modeling of a range of flow regimes across the fracture. The method is robust in the following way: (1) Stability of the formulation in the full range of parameter choices; and (2) Not sensitive to the location of the interface in the background mesh. We derive an optimal order a priori error estimate and present illustrating numerical examples.

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VOLKOV, V. I., V. A. GORDEYCHUK, N. S. ES'KOV, and O. M. KOZYREV. "Numerical simulation by the MAH-3 code of the interfaces using an unstructured mesh of markers." Laser and Particle Beams 18, no. 2 (April 2000): 197–205. http://dx.doi.org/10.1017/s0263034600182072.

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The paper addresses Rayleigh–Taylor instability (RTI) problems and presents a method of describing an interface with markers on a Eulerian mesh, which is implemented in the MAH-3 code. The proposed method allows a more accurate description of the evolution of the interface caused by Rayleigh–Taylor perturbations and preserves symmetry of the interface under appropriate symmetry of the problem (planar, cylindrical, and spherical). The method employs an unstructured triangular mesh of makers. Method capabilities are demonstrated on 2D and 3D Rayleigh–Taylor instability problems.

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Iqbal, Saleem, Abdul Hanan Abdullah, Mohd Murtadha Mohamad, Kashif Naseer Qureshi, and Khalid Hussain. "Adaptive Interface Reconfiguration in Low-Rate Mesh WPANs." Journal of Computational and Theoretical Nanoscience 13, no. 7 (July 1, 2016): 4703–10. http://dx.doi.org/10.1166/jctn.2016.5340.

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Zhang, Hongxin, Dong Xu, and Hujun Bao. "Material-aware differential mesh deformation using sketching interface." Visual Computer 24, no. 2 (December 7, 2007): 85–93. http://dx.doi.org/10.1007/s00371-007-0187-7.

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Gillis, T., Y. Marichal, G. Winckelmans, and P. Chatelain. "A 2D immersed interface Vortex Particle-Mesh method." Journal of Computational Physics 394 (October 2019): 700–718. http://dx.doi.org/10.1016/j.jcp.2019.05.033.

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Marichal, Yves, Philippe Chatelain, and Grégoire Winckelmans. "Immersed interface interpolation schemes for particle–mesh methods." Journal of Computational Physics 326 (December 2016): 947–72. http://dx.doi.org/10.1016/j.jcp.2016.09.027.

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Kim, Hae-Won, Hae-Hyoung Lee, and Jonathan C. Knowles. "Nanofibrous Glass Tailored with Apatite-Fibronectin Interface for Bone Cell Stimulation." Journal of Nanoscience and Nanotechnology 8, no. 6 (June 1, 2008): 3013–19. http://dx.doi.org/10.1166/jnn.2008.106.

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Exploring a material with smart and biomimetic interface has great potential in the biomaterials and tissue engineering field. This paper reports a novel nanofibrous bone matrix that was developed to retain a cell-stimulating and bone-mimetic biointerface. The bone mineral, apatite, and the cell adhesive protein, fibronectin (FN), were hybridized on the interface of a bioactive glass nano-fibrous mesh, through the dissolution-and-reprecipitation process. The hybridized nanofibrous mesh showed significant improvement in the initial responses of the bone-derived cells. It is believed that this biomimetic and cell-stimulating nanofibrous mesh can be used as a potential bone regeneration matrix.

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Jones, Chartese, and Xu Zhang. "An efficient numerical method for one-dimensional hyperbolic interface problems." ITM Web of Conferences 29 (2019): 01002. http://dx.doi.org/10.1051/itmconf/20192901002.

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In this paper, we develop an efficient numerical scheme for solving one-dimensional hyperbolic interface problems. The immersed finite element (IFE) method is used for spatial discretization, which allows the solution mesh to be independent of the interface. Consequently, a fixed uniform mesh can be used throughout the entire simulation. The method of lines is used for temporal discretization. Numerical experiments are provided to show the features of these new methods.

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Kuprat, Andrew, Denise George, Eldon Linnebur, Harold Trease, and R. Kent Smith. "Moving Adaptive Unstructured 3-D Meshes in Semiconductor Process Modeling Applications." VLSI Design 6, no. 1-4 (January 1, 1998): 373–78. http://dx.doi.org/10.1155/1998/15828.

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The next generation of semiconductor process and device modeling codes will require 3-D mesh capabilities including moving volume and surface grids, adaptive mesh refinement and adaptive mesh smoothing. To illustrate the value of these techniques, a time dependent process simulation model was constructed using analytic functions to return time dependent dopant concentration and time dependent SiO2 volume and surface velocities. Adaptive mesh refinement and adaptive mesh smoothing techniques were used to resolve the moving boron dopant diffusion front in the Si substrate. The adaptive mesh smoothing technique involves minimizing the L2 norm of the gradient of the error between the true dopant concentration and the piecewise linear approximation over the tetrahedral mesh thus assuring that the mesh is optimal for representing evolving solution gradients. Also implemented is constrained boundary smoothing, wherein the moving SiO2/Si interface is represented by moving nodes that correctly track the interface motion, and which use their remaining degrees of freedom to minimize the aforementioned error norm. Thus, optimal tetrahedral shape and alignment is obtained even in the neighborhood of a moving boundary. If desired, a topological “reconnection” step maintains a Delaunay mesh at all times. The combination of adaptive refinement, adaptive smoothing, and mesh reconnection gives excellent front tracking, feature resolution, and grid quality for finite volume/finite element computation.

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Sakamoto, Shinji, Admir Barolli, Leonard Barolli, and Shusuke Okamoto. "Implementation of a Web interface for hybrid intelligent systems." International Journal of Web Information Systems 15, no. 4 (October 7, 2019): 420–31. http://dx.doi.org/10.1108/ijwis-10-2018-0071.

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PurposeThe purpose of this paper is to implement a Web interface for hybrid intelligent systems. Using the implemented Web interface, this paper evaluates two hybrid intelligent systems based on particle swarm optimization, hill climbing and distributed genetic algorithm to solve the node placement problem in wireless mesh networks (WMNs).Design/methodology/approachThe node placement problem in WMNs is well-known to be a computationally hard problem. Therefore, the authors use intelligent algorithms to solve this problem. The implemented systems are intelligent systems based on meta-heuristics algorithms: Particle Swarm Optimization (PSO), Hill Climbing (HC) and Distributed Genetic Algorithm (DGA). The authors implement two hybrid intelligent systems: WMN-PSODGA and WMN-PSOHC-DGA.FindingsThe authors carried out simulations using the implemented Web interface. From the simulations results, it was found that the WMN-PSOHC-DGA system has a better performance compared with the WMN-PSODGA system.Research limitations/implicationsFor simulations, the authors considered Normal distribution of mesh clients. In the future, the authors need to consider different client distributions, patterns, number of mesh nodes and communication distance.Originality/valueIn this research work, the authors implemented a Web interface for hybrid intelligent systems. The implemented interface can be extended for other metaheuristic algorithms.

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Zhou, Tao, Guosong Hong, Tian-Ming Fu, Xiao Yang, Thomas G. Schuhmann, Robert D. Viveros, and Charles M. Lieber. "Syringe-injectable mesh electronics integrate seamlessly with minimal chronic immune response in the brain." Proceedings of the National Academy of Sciences 114, no. 23 (May 22, 2017): 5894–99. http://dx.doi.org/10.1073/pnas.1705509114.

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Implantation of electrical probes into the brain has been central to both neuroscience research and biomedical applications, although conventional probes induce gliosis in surrounding tissue. We recently reported ultraflexible open mesh electronics implanted into rodent brains by syringe injection that exhibit promising chronic tissue response and recording stability. Here we report time-dependent histology studies of the mesh electronics/brain-tissue interface obtained from sections perpendicular and parallel to probe long axis, as well as studies of conventional flexible thin-film probes. Confocal fluorescence microscopy images of the perpendicular and parallel brain slices containing mesh electronics showed that the distribution of astrocytes, microglia, and neurons became uniform from 2–12 wk, whereas flexible thin-film probes yield a marked accumulation of astrocytes and microglia and decrease of neurons for the same period. Quantitative analyses of 4- and 12-wk data showed that the signals for neurons, axons, astrocytes, and microglia are nearly the same from the mesh electronics surface to the baseline far from the probes, in contrast to flexible polymer probes, which show decreases in neuron and increases in astrocyte and microglia signals. Notably, images of sagittal brain slices containing nearly the entire mesh electronics probe showed that the tissue interface was uniform and neurons and neurofilaments penetrated through the mesh by 3 mo postimplantation. The minimal immune response and seamless interface with brain tissue postimplantation achieved by ultraflexible open mesh electronics probes provide substantial advantages and could enable a wide range of opportunities for in vivo chronic recording and modulation of brain activity in the future.

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Wang, Yujia. "Mechanical properties of steel-plastic grating and its application in fractured rock slope support project." Materials Express 13, no. 2 (February 1, 2023): 352–64. http://dx.doi.org/10.1166/mex.2023.2345.

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Anchor network support is an effective method for rocky slope support, but the defects of metal mesh in anchor network support structure to lead to the decrease of support effect and increase of support cost, which cannot be ignored. In view of the disadvantages of the metal mesh support, the steel-plastic grid is introduced into the anchor mesh support structure. In order to study the mechanical properties of steel-plastic grating and its application effect in rocky slope support, the influence mechanism of mesh size and node form on the mechanical properties of steel-plastic grating was studied by indoor experiments, and the feasibility of applying steel-plastic grating to high slope support structure was investigated by field tests. The conclusion of the study shows that the strength is maximum when the mesh size is 1:1 and the force distribution is uniform, but for the unidirectional force situation, the steel-plastic geogrid with a transverse to longitudinal ratio of 1:1.5 mesh is more economical. The influence law of nodal protrusion on the reinforcing effect of steel-plastic grating. The friction coefficient of the interface of steel-plastic grating is related to the interface of tendon and soil, and the friction coefficient of the interface is proportional to the mesh size, and the degree of influence of the nodes on the friction resistance is larger, and the larger the nodes, the better the reinforcement effect. The feasibility of steel-plastic grating applied to high slope support structure provides experience for similar construction projects.

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Birch, Daniel W., and Adrian Park. "Octylcyanoacrylate Tissue Adhesive as an Alternative to Mechanical Fixation of Expanded Polytetrafluoroethylene Prosthesis." American Surgeon 67, no. 10 (October 2001): 974–78. http://dx.doi.org/10.1177/000313480106701013.

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In minimally invasive incisional hernia repair positioning and fixation of the expanded polytetrafluoroethylene (ePTFE) mesh prosthesis on the deep surface of the abdominal wall may be facilitated using tissue adhesives. Octylcyanoacrylate (OCTYL), a new adhesive, forms a strong flexible bond with antimicrobial properties. In a rabbit model for incisional hernia we investigated characteristics of the bond created by OCTYL between ePTFE and abdominal wall musculature. We studied initial bond strength and the postoperative host response to the adhesive over a 6-week period. We compared sutured, stapled, and glued mesh prostheses and examined the tissue-prosthesis interface. The ePTFE mesh was fixed successfully to the abdominal wall with OCTYL and remained tightly attached at 6 weeks. Prostheses fixed with OCTYL and spiral tacks induced few intra-abdominal adhesions compared with sutured mesh. All prostheses were completely reperitonealized at 2 weeks. The force required to displace mesh fixed with sutures and staples was greater than mesh fixed with OCTYL. Analysis of the ePTFE/tissue interface by light and scanning electron microscopy showed host cellular migration into the interstices of the mesh with fixation by tacks and suture, whereas an inflammatory infiltrate was seen on the muscular surface with OCTYL fixation of the mesh.

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Bohm, Sebastian, and Erich Runge. "Multiphysics simulation of fluid interface shapes in microfluidic systems driven by electrowetting on dielectrics." Journal of Applied Physics 132, no. 22 (December 14, 2022): 224702. http://dx.doi.org/10.1063/5.0110149.

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We present a highly efficient simulation method for the calculation of three-dimensional quasi-static interface shapes under the influence of electric fields. The method is especially useful for the simulation of microfluidic systems driven by electrowetting on dielectrics because it accounts automatically and inherently for the highly non-trivial interface shape in the vicinity of the triple-phase contact. In particular, the voltage independence of the local contact angle predicted based on analytical considerations is correctly reproduced in all our simulations. For the calculation of the shape of the interface, the geometry is triangulated and the mesh nodes are shifted until the system energy becomes minimal. The same mesh is also used to calculate the electric field using the boundary-element method. Therefore, only the surface of the geometry needs to be meshed, and no volume meshes are involved. The method can be used for the simulation of closed systems with a constant volume (e.g., droplet-based microfluidics) while preserving the volume very precisely as well as open systems (e.g., the liquid–air interface within micro-cavities or capillaries). Additional effects, such as the influence of gravitational forces, can easily be taken into account. In contrast to other efficient simulations, such as the volume-of-fluid, level-set, or phase-field methods, ideally, sharp interfaces are obtained. We calculate interface shapes for exemplary systems and compare with analytical as well as experimental results.

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Chen, Long, Huayi Wei, and Min Wen. "An interface-fitted mesh generator and virtual element methods for elliptic interface problems." Journal of Computational Physics 334 (April 2017): 327–48. http://dx.doi.org/10.1016/j.jcp.2017.01.004.

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Ma, Wenpeng, Xiaodong Hu, and Xiazhen Liu. "Parallel multibody separation simulation using MPI and OpenMP with communication optimization." Journal of Algorithms & Computational Technology 13 (September 7, 2018): 174830181879706. http://dx.doi.org/10.1177/1748301818797062.

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In this paper we investigate parallel implementations of multibody separation simulation using a hybrid of message passing interface and OpenMP. We propose a mesh block-based overset communication optimization algorithm. After presenting details of local data structures, we present our strategy for parallelizing both the overset mesh assembler and the flow solver by employing message passing interface and OpenMP. Experimental results show that the mesh block-based overset communication optimization algorithm has an advantage in real elapsed time when compared to a process-based implementation. The hybrid version shows that it is suitable for improving the load balance if a large number of CPU cores are used. We report results for a standard multibody separation case.

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Bambach, Markus. "Re-Meshing in Finite Element Simulations of Hot Working Including a Microstructural Evolution Model." Key Engineering Materials 611-612 (May 2014): 505–12. http://dx.doi.org/10.4028/www.scientific.net/kem.611-612.505.

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Material models that couple the evolution of flow stress to the evolution of the microstructure are important for the simulation of hot working processes in which the microstructure undergoes large changes. Among the microstructural evolution mechanisms in hot working, dynamic recrystallization (DRX) plays a central role as it occurs during deformation. When the workpiece deforms, the element shape may deteriorate, which makes re-meshing necessary. At the same time, certain regions of the finite element mesh undergo DRX and a sharp interface between recrystallized and non-recrystallized portions of the workpiece develops. Elements of the old mesh that are cut by the interface contain nodes with a non-zero recrystallized volume fraction and nodes where the recrystallized volume fraction is zero. During re-meshing, when the microstructural data is transferred to the new mesh, nodes or integration points that are actually in region of the workpiece that is not yet recrystallized may be assigned a non-zero recrystallized volume fraction. As a consequence, the interface moves, which is unwanted and may produce large errors when re-meshing is frequently done. In this paper, the problem of the propagation of the DRX interface during re-meshing is treated. It is shown that the propagation occurs with standard data mapping algorithms and produces a large error at the interface. A re-meshing scheme is proposed that uses a smooth mesh-free interpolating function based on radial basis functions to interpolate the recrystallized volume fraction. The interface is the zero level set of this interpolant. Performing the mapping as a least squares fit of the interpolant allows for a substantial reduction of the mapping error and suppresses the propagation of the DRX front.

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Zhang, Lei, Guoxin Zhang, Yi Liu, and Hailin Pan. "Mesh Partitioning Algorithm Based on Parallel Finite Element Analysis and Its Actualization." Mathematical Problems in Engineering 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/751030.

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In parallel computing based on finite element analysis, domain decomposition is a key technique for its preprocessing. Generally, a domain decomposition of a mesh can be realized through partitioning of a graph which is converted from a finite element mesh. This paper discusses the method for graph partitioning and the way to actualize mesh partitioning. Relevant softwares are introduced, and the data structure and key functions of Metis and ParMetis are introduced. The writing, compiling, and testing of the mesh partitioning interface program based on these key functions are performed. The results indicate some objective law and characteristics to guide the users who use the graph partitioning algorithm and software to write PFEM program, and ideal partitioning effects can be achieved by actualizing mesh partitioning through the program. The interface program can also be used directly by the engineering researchers as a module of the PFEM software. So that it can reduce the application of the threshold of graph partitioning algorithm, improve the calculation efficiency, and promote the application of graph theory and parallel computing.

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Lin, Tao, Yanping Lin, and Xu Zhang. "A Method of Lines Based on Immersed Finite Elements for Parabolic Moving Interface Problems." Advances in Applied Mathematics and Mechanics 5, no. 04 (August 2013): 548–68. http://dx.doi.org/10.4208/aamm.13-13s11.

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AbstractThis article extends the finite element method of lines to a parabolic initial boundary value problem whose diffusion coefficient is discontinuous across an interface that changes with respect to time. The method presented here uses immersed finite element (IFE) functions for the discretization in spatial variables that can be carried out over a fixed mesh (such as a Cartesian mesh if desired), and this feature makes it possible to reduce the parabolic equation to a system of ordinary differential equations (ODE) through the usual semi-discretization procedure. Therefore, with a suitable choice of the ODE solver, this method can reliably and efficiently solve a parabolic moving interface problem over a fixed structured (Cartesian) mesh. Numerical examples are presented to demonstrate features of this new method.

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Xue, Guang Ji, Shou Ren Wang, Ping Li, Yang Qiao, and Ying Han. "Microstructure and Mechanical Properties of Laminated Mg-Based Composites." Advanced Materials Research 941-944 (June 2014): 883–86. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.883.

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A new design method to achieve the laminated Ti-Al-Mg composites by stack processing with magnesium alloy plate, aluminum powder, titanium mesh and vacuum hot-pressed sintered. Sintering laminated material in different sintering temperature. The microstructure, ingredient, structure of laminated material and the interface of Ti-Al, Mg-Al were analyzed by SEM and EDS. Test results show that the optimum sintering temperature is 550 oC, and after sintered the aluminum powder and magnesium alloy plate hang together relatively tight by slight interface reaction, and aluminum powder can able to better coating the titanium mesh within the matrix. Mechanical property test found that titanium mesh is role-playing the reinforcement in laminated material, and makes the mechanical properties of laminated material improving significantly.

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Tian, Qi Ming. "A Novel Routing Protocol Based on the Channel Load Similarity for Multi-Interface Wireless Mesh Networks." Advanced Engineering Forum 1 (September 2011): 81–85. http://dx.doi.org/10.4028/www.scientific.net/aef.1.81.

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Routing protocols are the key factors which determine the communication performance in the multi-interface wireless mesh networks. The existing routing protocols can not capture the channel interference accurately. In order to utilize the multi-interface technology to reduce the interference and improve the network throughput, this paper presented a novel routing metric for multi-interface wireless mesh networks. This metric integrated both the channel similarity and the link load to measure the route quality. Furthermore, this paper applied this routing metric to the AODV routing protocol which formed a new routing protocol. The simulation results show that the new protocol outperforms the original AODV protocol in terms of the average throughput, transmission rate and end-to-end delay.

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Youyi Zheng, Chiew-Lan Tai, and O. K.-C. Au. "Dot Scissor: A Single-Click Interface for Mesh Segmentation." IEEE Transactions on Visualization and Computer Graphics 18, no. 8 (August 2012): 1304–12. http://dx.doi.org/10.1109/tvcg.2011.140.

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Nealen, Andrew, Olga Sorkine, Marc Alexa, and Daniel Cohen-Or. "A sketch-based interface for detail-preserving mesh editing." ACM Transactions on Graphics 24, no. 3 (July 2005): 1142–47. http://dx.doi.org/10.1145/1073204.1073324.

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Marichal, Y., P. Chatelain, and G. Winckelmans. "Unbounded Immersed Interface Solver for Vortex Particle-Mesh Methods." Procedia IUTAM 18 (2015): 96–106. http://dx.doi.org/10.1016/j.piutam.2015.11.010.

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Perline, K. R., and B. T. Helenbrook. "A hybrid level-set/moving-mesh interface tracking method." Applied Numerical Mathematics 92 (June 2015): 21–39. http://dx.doi.org/10.1016/j.apnum.2015.01.004.

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Choi, Dae-Il, J. David Brown, Breno Imbiriba, Joan Centrella, and Peter MacNeice. "Interface conditions for wave propagation through mesh refinement boundaries." Journal of Computational Physics 193, no. 2 (January 2004): 398–425. http://dx.doi.org/10.1016/j.jcp.2003.07.036.

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Mahboob, Amir, Lluís Gil, Ernest Bernat-Maso, and Amir Reza Eskenati. "Experimental and Numerical Study of Shear Interface Response of Hybrid Thin CFRP–Concrete Slabs." Materials 14, no. 18 (September 9, 2021): 5184. http://dx.doi.org/10.3390/ma14185184.

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Hybrid slabs made of carbon-fiber-reinforced polymer (CFRP) and concrete provide a solution that takes advantage of the strength properties of both materials. The performance of the system strongly depends on the CFRP–concrete interaction. This study investigates the shear behavior in the interface of the two materials. Eight full-scale experiments were carried out to characterize the interface shear response of these hybrid elements using different connection solutions. An untreated surface is compared to a surface with aggregates, with a novel system comprising a flexible, straight glass fiber mesh and an inclined glass fiber mesh. The experimental results show that the fabric connection improves the friction between materials and is responsible for the pseudo-plastic performance of the specimens. The inclined mesh produces a more uniform tightening effect compared to the straight mesh. In simulations via the finite element method, we used an adjusted frictional model to reproduce the experiments.

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Ciancio, Daniela, and Giovanni Castellazzi. "Fictitious Elastic Stiffness Parameters of Zero-Thickness Finite Elements at Bi-Material Interfaces." Applied Mechanics and Materials 553 (May 2014): 16–21. http://dx.doi.org/10.4028/www.scientific.net/amm.553.16.

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Zero-thickness interface elements can be used to simulate delamination processes or more in general to model discrete cracks or debonding effects in heterogeneous materials. These elements are inserted amongst the mesh lines in correspondence with the bi-material interface. The zero-thickness interfaces behave as non-linear elements that dissipate energy only after certain cracking conditions have been reached. To keep the interface closed while the cracking conditions are not yet satisfied, a fictitious elastic behaviour is imposed through penalty stiffness parameters. These are elastic stiffness parameters set as high as possible to guarantee that no penetration or separation take place while the cracking nucleation conditions are not satisfied, but not so high to avoid ill-posed problems. Based on a recent formulation, this paper investigates the use of optimal fictitious elastic parameters that guarantee the recovery of accurate pre-cracking inter-element forces and stresses at the bi-material interfaces.

Journal articles on the topic 'Interface mesh'

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