In-service the degradation of compressor blade leading edges can have a disproportional effect on compressor efficiency. The high surface curvature in this region makes quantifying the surface finish of this sensitive and prominent region difficult. An automated technique that characterises the roughness of the leading edge in terms of areal parameters is presented. A set of ex-service blades o...

In this work, we consider the problem of background pixels information recovering which can be used, for example, in applications concerning segmentation and tracking of components in video images. Shortly, to recover the background of image sequences representing outdoor scenes, we consider a non-parametric morphological leveling operation, which takes into account the specific problem of ligh...

the earth’s gravity field dedicated missions provide homogeneous and uniformly accurate information on the long wavelengths of the earth’s gravity field. many different global geopotential models have introduced by earth and space research centers during the last years. the geopotential models derived from the grace satellite measurements are compared with the other models at different frequenc...

The high-precision unification of global height datum has long been a hot issue in the field geodesy. chronometric leveling method originates from gravitational redshift effect general relativity, which may provide new solution for datum. difference between two locations could be measured via frequency comparison optical clocks. We build error model leveling, mainly including measurement system...

This paper is well targeted in researching several researches of various tool wear monitoring methods in domestic and foreign. Five important tool wear methods are deeply investigated and described in detail. Through comparing the advantages and disadvantages of each monitoring method according to practical application, and draw a conclusion that the based on multi-sensors method is considered ...

Wear resistance of Cu–18 vol.% Nb (P/M) composites H. Nayeb-Hashemi a,∗, A. Vaziri b, K. Ziemer c a Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, United States b School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States c Department of Chemical Engineering, Northeastern University, Boston, MA 02115, Unite...

Condition monitoring systems of manufacturing processes have been recognised in recent years as one of the key technologies that provide the competitive advantage in many manufacturing environments. It is capable of providing essential means to reduce cost, increase productivity, improve quality and prevent damage to the machine or work-piece. Turning operations are considered one of the most c...

The purpose of this paper is to examine production smoothing in supply chains. Using the controlled setting of the laboratory, we systematically investigate supply chain features that lead to production smoothing. In contrast to prior laboratory studies of the bullwhip effect, we find that the bullwhip effect disappears in several of our experiments. More importantly, our study shows that when ...