‎‎‎Recently Samet et al. introduced the notion of $alpha$-$psi$-contractive type mappings and established some fixed point theorems in complete metric spaces. In this paper, we introduce $alpha$-$(psi,varphi)$-contractive mappings and stablish coincidence and common fixed point theorems for two mapping in complete metric spaces. We present some examples to illustrate our results. As application...

In this study we present results of the dynamic compression $\ensuremath{\alpha}$-cristobalite up to a pressure 106 GPa with use diamond anvil cell. X-ray diffraction images were recorded at different ramp and decompression rates investigate in situ high-pressure phase transitions $\ensuremath{\alpha}$-cristobalite. Our suggest that onset transformation cristobalite II, X-I, ultimately seiferti...

in this paper, we study the convexity of the integral operator

*Correspondence: [email protected] 2School of Information & Statistics, Guangxi University of Financial and Economics, Nanning, Guangxi 530003, China Full list of author information is available at the end of the article Abstract In this paper, we establish some generalizations and refinements of the Hölder inequality on time scales via the diamond-α dynamic integral, which is defined as a li...

In this paper, we study the convexity of the integral operator

Fuzzy measures can flexibly describe the relative importance of decision criterion as well as their interactions in multicriteria decision making. Based on the diamond pairwise comparison, a new identification method of 2-order additive fuzzy measure is proposed. The relative weight and the interaction degree can be obtained simultaneously for every pair of criteria in the diamond pairwise comp...

Two types of micron-diamond films were prepared on YG6 substrate by hot filament chemical vapor deposition(HFCVD) method. Morphology and orientation of crystalline growth were evaluated by SEM and XRD. Diamond film coated tools and sapphire wafer’ surface before and after lapping experiment  were contrasted. The results indicated that a significant change in Raman spectrum of two types of micro...

This paper reviews existing studies and investigates thermal operational regimes of diamond bit during drilling operations. The operating temperature of the diamond core drill is studied under bench condition and an optimal thermal range are presented. Based on this study, it was noted that glazing of diamond tools is observed at temperatures less than 327°C, and normal wear of diamond tools is...