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    In order to investigate the effect of hot-press fabrication parameters on mechanical properties of Al2O3 ceramic tool materials, the orthogonal experiment method was used. In the experiments, the three influence factors such as the fabrication temperature, pressure and duration time are considered. The experimental results are analyzed by a range analysis of orthogonal experiments. It is shown that the most important factor that affects the mechanical properties is the fabrication temperature and the followed factors are the fabrication pressure and the duration time of fabrication. Scanning electron microscope (SEM) reveals that the hot-press fabrication parameters will significantly affect the microstructure of ceramic tool materials, which can govern the mechanical properties. This has been validated by the orthogonal experiments in the present paper.
    In this article, we present new results on simple points, minimal non-simple sets (MNS) and P-simple points. In particular, we propose new characterizations which hold in dimensions 2, 3 and 4, and which lead to efficient algorithms for detecting such points or sets. This work is settled in the framework of cubical complexes, and some of the main results are based on the properties of critical kernels.
    SIMPLE algorithm
    Fabrication devices often appear as "large, clunky cubes", and the more capable a machine is, the larger it usually is as well. Minus 1D Fabrication investigates decoupling the output dimensions of fabrication machines from the form factor of the machines themselves. We propose designs for pen-shaped laser cutters and book-sized 3D printers, including designs that can increase the build volume without increasing the size of the machine. The resulting form factors assist the integration of fabrication into daily life.
    Decoupling (probability)
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    With the wide application of micro sensors,micromachining technology is more and more used in manufacture for micro sensors.The key processes of bulk micromachining and surface micromachining are introduced,and two micro sensors using the above technologies are presented respectively.
    Bulk micromachining
    Citations (1)
    The principle of electrochemical micromachining(EMM) is introduced in this paper. The main fabrication technology of EMM, such as EMM by the tip of EC-SPM,electrochemical fabrication (EFAB), confined etchant layer technique (CELT) and super-micro pole of EMM, are described in detail.
    Bulk micromachining
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    In this paper, we investigate the properties of the [0-simple] simple subsemigroups of nonnegative matrices and show that the [0-simple] simple subsemigroups of Mn(S) are completely [0-simple] simple, where S is a strong ideal subset of R+ which has no ele- ments less than 1 except 0. Finally, we illustrate that the semigroup of nonnegative matriles is interesting.
    Citations (0)