Xuzhou Institute of Technology

About: Xuzhou Institute of Technology is a education organization based out in Xuzhou, China. It is known for research contribution in the topics: Catalysis & Computer science. The organization has 1696 authors who have published 1521 publications receiving 13541 citations.

Local and Global Measurements of MGRS Rules

Abstract: Since the multigranulation rough sets (MGRS) can be considered as the compositions of multi–independent Pawlak's rough sets, the multigranulation rough set rules (MGRS rules) are then the compositions of decision rules, which are supported by multi–independent Pawlak's rough sets. To measure MGRS rules, both the local and global views are employed in this paper. In local view, the support, certainty and coverage factors are proposed to measure MGRS rules, which are support by an object; while in global view, these three factors are proposed to measure MGRS rules, which are coexisting in a decision system. The necessary conditions for these factors to achieve maximal and minimal values are also addressed. Some numerical examples are employed to substantiate the conceptual arguments.

On an Extension of Stević–Sharma Operator from the General Space to Weighted-Type Spaces on the Unit Ball

Abstract: Let \(H({\mathbb {B}})\) denote the space of all holomorphic functions on the unit ball \({\mathbb {B}}\) of \( {\mathbb {C}}^n\), \(\psi _1,\psi _2,\psi _3\in H({\mathbb {B}}) \) and \(\varphi \) be a holomorphic self-map of \( {\mathbb {B}}\). This paper studies the boundedness and compactness of the following extension of the Stevic–Sharma operator, recently proposed by Liu and Yu $$\begin{aligned} T_{\psi _1, \psi _2, \psi _3,\varphi }f(z)=\psi _1(z)f(\varphi (z))+\psi _2(z){{\mathcal {R}}}f(\varphi (z))+\psi _3(z){{\mathcal {R}}}\left( f\circ \varphi \right) (z), z\in {\mathbb {B}}, \end{aligned}$$ where \({{\mathcal {R}}}f(z)\) is the radial derivative of \(f\) at \(z\), from the general space \(F(p, q, s)\) to the weighted-type space \(H_{\mu }^\infty \) or the little weighted-type space \(H_{\mu ,0}^\infty \) on the unit ball.

Nonlinear Dynamics Mechanism of Rock Burst Induced by the Instability of the Layer-Crack Plate Structure in the Coal Wall in Deep Coal Mining

Abstract: The instability of layer-crack plate structure in coal wall is one of the causes of rock burst. In the present paper, we investigate the formation and instability processes of layer-crack plate structure in coal wall by experiments and theoretical analysis. The results reveal that layer-crack plate structure formed near the free surface of the coal wall during the loading. During the formation of the layer-crack plate structure, the lateral displacement curve of the coal wall experiences a jagged variation, which suggests the nonlinear instability failure of the coal wall with a sudden release of the elastic energy. Then, a dynamic model for the stability analysis of the layer-crack plate structure was proposed, which takes consideration of the dynamic disturbance factor. Based on the dynamic model, the criterion for dynamic instability of the layer-crack plate structure was determined and demonstrated by an example. According to the analytical results, some control methods of dynamic stability of the layer-crack plate structure was put forward.