The Yang-Baxter equation admits two classes of elliptic solutions, the vertex type and the face type.
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It is well known that singular maps (i.e., those have only one face on a surface) play a key role in the theory of up-embeddability of graphs.
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It is found that the head-on face (in contact with solution) of the films is green while the back face is white.
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The phase transformation from a hexagonal close-packed Ni to a face-centered cubic Ni structure occurred when the heat-treating temperature was increased.
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Nanocrystalline nickel with an average diameter of about 16 nm and a face-centered cubic (fcc) structure was uniformly attached to the surface of carbon nanotubes (CNT) by wet chemistry.
The expedient quantities of reserved working faces for regulating interference has been calculated by The ory of Queue in this paper.Suppose that the input and output are in Poisson and negative exponential distri-bution respectively, and the service takes as soon as interference appears, the text has used a queuing model with limited input for calculation.Regarding to the interval between the time to finish driving the next working face and the time to finish working theprevions one as a random...
This article is a preliminary summing-up of experience from investigation, chiefly through field observations, of the rule governing the indication of underground pres-sure at the longwall working faces of the Tong Chia Chuang and Lin Hsi Pits of the Kailan Mines.A preliminary analysis dealing with the following problems is fully treated.① the unit-pressure acting upon column supports at the working face.② the amount af roof subsidence at the working face.③ the rate of roof subsidence at t...
The 15-foot seam and its underlying 8-foot seam of the Tu-er-ping Mine, constitu-ting a group of thick seams with hard roofs lying closely together. This article is based upon obervations made on the 15-foot seam while mining was carried out at the № 2647 Face.Roof control was accomplished by forced-down caving, with entire roof subsiden-ce, thereby noting the breaking-up and the shifting of the roof, for ascertaining the rock pressure and its natural law.Such study brings benefit as to the improvemen...