The accumulation and reorganization of“article similar blocks”constitute people’s writing intelligence,which directly determines the writing ability of the article.The teaching of writing should focus on the core o...The accumulation and reorganization of“article similar blocks”constitute people’s writing intelligence,which directly determines the writing ability of the article.The teaching of writing should focus on the core of students’writing intelligence,the construction of“article similarity block”,and the teaching should be organized and implemented according to the law of human brain thinking.The necessary screening and integration of similar blocks is the primary premise for the construction of“similar blocks”of the writing subject.It is undoubtedly an important task for writing teaching to construct these“similar blocks”in the cognitive structure of the subject.Article similarity block is always in a static state in the human brain.Only similarity activation can awaken and activate the sleeping“similarity block”,promote coupling resonance,and move towards similarity innovation.展开更多
Long-term planning is one of the most important stages that determines the distribution of cash flows over the mine life and the feasibility of the project. However, it is not feasible in block caving to generate a pr...Long-term planning is one of the most important stages that determines the distribution of cash flows over the mine life and the feasibility of the project. However, it is not feasible in block caving to generate a production schedule that will provide optimal operating strategies without considering geotechnical constraints. This paper develops a mixed-integer linear programming(MILP) model to optimize the extraction sequence of drawpoints over multiple time horizons of block-cave mines with respect to the draw control systems. A multi-similarity index clustering technique to solve the MILP model in a reasonable time is also presented. Application and comparison of production scheduling based on the draw control system and clustering technique are illustrated using 325 drawpoints over 15 periods. The results show a significant reduction in the size of the MILP model, and in the time required to solve it.展开更多
文摘The accumulation and reorganization of“article similar blocks”constitute people’s writing intelligence,which directly determines the writing ability of the article.The teaching of writing should focus on the core of students’writing intelligence,the construction of“article similarity block”,and the teaching should be organized and implemented according to the law of human brain thinking.The necessary screening and integration of similar blocks is the primary premise for the construction of“similar blocks”of the writing subject.It is undoubtedly an important task for writing teaching to construct these“similar blocks”in the cognitive structure of the subject.Article similarity block is always in a static state in the human brain.Only similarity activation can awaken and activate the sleeping“similarity block”,promote coupling resonance,and move towards similarity innovation.
文摘Long-term planning is one of the most important stages that determines the distribution of cash flows over the mine life and the feasibility of the project. However, it is not feasible in block caving to generate a production schedule that will provide optimal operating strategies without considering geotechnical constraints. This paper develops a mixed-integer linear programming(MILP) model to optimize the extraction sequence of drawpoints over multiple time horizons of block-cave mines with respect to the draw control systems. A multi-similarity index clustering technique to solve the MILP model in a reasonable time is also presented. Application and comparison of production scheduling based on the draw control system and clustering technique are illustrated using 325 drawpoints over 15 periods. The results show a significant reduction in the size of the MILP model, and in the time required to solve it.
