The DiamondCandy LRnLA algorithm: raising efficiency of the 3D cross-stencil schemes

The Journal of Supercomputing - The parallel efficiency is raised by increasing the locality of calculation. With the locally recursive non-locally asynchronous algorithms method, we have...     

Learning Fuzzy Set Representations of Partial Shapes on Dual Embedding Spaces

Modeling relations between components of 3D objects is essential for many geometry editing tasks. Existing techniques commonly rely on labeled components, which requires substantial annotation effort and limits components to a dictionary of predefined semantic parts. We propose a novel framework based on neural networks that analyzes an uncurated collection of 3D models from the same category and learns two important types of semantic relations among full and partial shapes: complementarity and interchangeability. The former helps to identify which two partial shapes make a complete plausible object, and the latter indicates that interchanging two partial shapes from different objects preserves the object plausibility. Our key idea is to jointly encode both relations by embedding partial shapes as fuzzy sets in dual embedding spaces. We model these two relations as fuzzy set operations performed across the dual embedding spaces, and within each space, respectively. We demonstrate the utility of our method for various retrieval tasks that are commonly needed in geometric modeling interfaces.     

Investigation of tribotechnical and service characteristics of diamond-containing materials based on SHMWPE and PTFE

Investigation results of service characteristics (specific consumption of diamonds, machining capacity, glazing of tools) of diamond abrasive materials based on high-molecular polyethylene and polytetrafluoroethylene are discussed. Optimum graininess and concentration of microgrit as well as conditions of steel and mineral material machining have been evaluated for both binders. It is shown that the tools based on PTFE are advantageous for a short-time grinding of steels, while the ones based on SHMWPE are better for a long-run grinding of minerals and steels.     

On a New Method for Iterative Calculation of Crack Trajectory

A new efficient iterative procedure to follow automatically crack trajectory is suggested. Parameters of the procedure and illustrative examples are given.     

Features of the long-term photo emf relaxation in a heteroepitaxial ZnSe-GaAs structure

The spectral characteristics and transverse distribution of the photo emf were studied in a heteroepitaxial ZnSe-GaAs structure obtained by MBE on a zinc-stabilized GaAs(100) substrate surface. The spectral measurements revealed unusual manifestations of the long-term photo emf relaxation, whereby the amplitude of the spectral characteristic of the photo emf depends on the direction of wavelength variation of the exciting monochromatic light. Dependence of the amplitude and sign (phase) of the photo emf on the intensity of light absorbed in the sample can be explained by time variation of the effective lifetime of the electron-hole pairs and by a difference in the lifetime values between various layers of the structure. Resistivity gradients at the heterostructure interface exhibit a layer character.     

Modeling the Drawing of Square-Cross-Section Pipes/Tubes Made from Various Materials

Metallurgist - This paper discusses cold sink drawing for production of square-cross-section pipe/tube and the effect that billet material has on the energy and power parameters describing the...     

Predicting the Fatigue Limit of Surface-Hardened Parts with Stress Concentrators

Russian Engineering Research - The possibility of predicting the fatigue limit of surface-hardened steel 20 with semicircular notches is considered: (1) on the basis of the residual stress at the...