Nowadays, in order to reach minimum production cost in machining operations, various optimization methods have been proposed. Since turning operation has different parameters affecting the workpiece quality, it was selected as a complicated manufacturing method in this paper. To reach sufficient quality, all influencing parameters such as cutting speed, federate, depth of cut and tool rake angl...

Energy efficiency evaluation of industrial park customers is carried out to help develop optimization strategies and improve the energy level. The indexes are proposed based on pressure-state-response (PSR) model redundant selected by combining principal component analysis (PCA) correlation analysis. Thus dynamic index system constructed. weight calculated entropy method (EWM). An improved Grey...

Information retrieval is an activity that implies to achieve documents that better fulfil the user information needs. For achieving this activity an Information Retrieval System uses matching functions which specify the degree of relevance of a document with respect to a user query. Assuming linguistic weighted queries we present a new linguistic matching function for a threshold weighting sema...

A d-process for s-uniform hypergraphs starts with an empty hypergraph on n vertices, and adds one s-tuple at each time step, chosen uniformly at random from those s-tuples which are not already present as a hyperedge and which consist entirely of vertices with degree less than d. We prove that for d ≥ 2 and s ≥ 3, with probability which tends to 1 as n tends to infinity, the final hypergraph is...

‎for any integer $kgeq 1$‎, ‎a set $s$ of vertices in a graph $g=(v,e)$ is a $k$-‎tuple total dominating set of $g$ if any vertex‎ ‎of $g$ is adjacent to at least $k$ vertices in $s$‎, ‎and any vertex‎ ‎of $v-s$ is adjacent to at least $k$ vertices in $v-s$‎. ‎the minimum number of vertices of such a set‎ ‎in $g$ we call the $k$-tuple total restrained domination number of $g$‎. ‎the maximum num...

A coloring of a q-ary n-dimensional cube (hypercube) is called perfect if, for every n-tuple x, the collection of the colors of the neighbors of x depends only on the color of x. A Boolean-valued function is called correlation-immune of degree n − m if it takes value 1 the same number of times for each m-dimensional face of the hypercube. Let f = χ S be a characteristic function of a subset S o...

Taking the regional logistics of Guangdong Province as research object, this paper uses relevant data and economy from 2015 to 2019, applies grey correlation analysis method study degree between indicators economic development level logistics. Through quantitative calculation, it clearly shows factors that have a greater impact on logistics, provides good suggestions Countermeasures for healthy