This paper studies an interdisciplinary subject of aesthetics andgeography-beautiful geography .Firsly,it expounds and proves theobjective existence of the beautiful geography from the aims and tasks,objects and cont...This paper studies an interdisciplinary subject of aesthetics andgeography-beautiful geography .Firsly,it expounds and proves theobjective existence of the beautiful geography from the aims and tasks,objects and contents of study in aesthetics and geography in relation totheir branch sciences.Secondly, it discusses the study objects and studycontents and nature of the beautiful geography.It concludes that studyobjects of beautiful geography is the beautifolness of geographic objects.The contents of study contain:1) aesthetic laws and principles of thegeographic objects and human experience to the geographic objects,2)aesthetic value and appraisal of the geographic objects, use of aestheticvalue of the geographic objects; 3) perceptional and behavior effction of the beatiful geographic objects along with its uses; and 4) beautification ofthe geographic objects and constructing beautiful geographic objects.Lastly, it investigates the significance and use of the beautiful geography,especially in distribution of production,urban planning, the appraisal ofresources and regionalization and planning and the construction of tourism.展开更多
Load behavior is one of the most critical factors affecting mills＇ energy consumption and grinding efficiency, and is greatly affected by the liner profiles. Generally, as liner profiles vary, the ball mill performan...Load behavior is one of the most critical factors affecting mills＇ energy consumption and grinding efficiency, and is greatly affected by the liner profiles. Generally, as liner profiles vary, the ball mill performances are extremely different. In order to study the performance of the ball mill with regular polygon angle-spiral liners（RPASLs）, experimental and numerical studies on three types of RPASLs, including regular quadrilateral, pentagonal and hexagonal, are carried out. For the fine product of desired size, two critical parameters are analyzed： the energy input to the mill per unit mass of the fine product, E＊, and the rate of production of the fine product, F＊. Results show that the optimal structure of RPASLs is Quadrilateral ASL with an assembled angle of 50°. Under this condition, the specific energy consumption E＊ has the minimum value of 303 J per fine product and the production rate F＊ has the maximum value of 0.323. The production rate F＊ in the experimental result is consistent with the specific collision energy intensity to total collision energy intensity ratio Es/Et in the simulation. The relations between the production rate F＊ and the specific energy consumption E＊ with collision energy intensity Es and Et are obtained. The simulation result reveals the essential reason for the experimental phenomenon and correlates the mill performance parameter to the collision energy between balls, which could guide the practical application for Quadrilateral ASL.展开更多
文摘This paper studies an interdisciplinary subject of aesthetics andgeography-beautiful geography .Firsly,it expounds and proves theobjective existence of the beautiful geography from the aims and tasks,objects and contents of study in aesthetics and geography in relation totheir branch sciences.Secondly, it discusses the study objects and studycontents and nature of the beautiful geography.It concludes that studyobjects of beautiful geography is the beautifolness of geographic objects.The contents of study contain:1) aesthetic laws and principles of thegeographic objects and human experience to the geographic objects,2)aesthetic value and appraisal of the geographic objects, use of aestheticvalue of the geographic objects; 3) perceptional and behavior effction of the beatiful geographic objects along with its uses; and 4) beautification ofthe geographic objects and constructing beautiful geographic objects.Lastly, it investigates the significance and use of the beautiful geography,especially in distribution of production,urban planning, the appraisal ofresources and regionalization and planning and the construction of tourism.
基金Supported by National Natural Science Foundation of China(Grant Nos.51675484,51275474,51505424)Zhejiang Provincial Natural Science Foundation of China(Grant Nos.LZ12E05002,LY15E050019)
文摘Load behavior is one of the most critical factors affecting mills＇ energy consumption and grinding efficiency, and is greatly affected by the liner profiles. Generally, as liner profiles vary, the ball mill performances are extremely different. In order to study the performance of the ball mill with regular polygon angle-spiral liners（RPASLs）, experimental and numerical studies on three types of RPASLs, including regular quadrilateral, pentagonal and hexagonal, are carried out. For the fine product of desired size, two critical parameters are analyzed： the energy input to the mill per unit mass of the fine product, E＊, and the rate of production of the fine product, F＊. Results show that the optimal structure of RPASLs is Quadrilateral ASL with an assembled angle of 50°. Under this condition, the specific energy consumption E＊ has the minimum value of 303 J per fine product and the production rate F＊ has the maximum value of 0.323. The production rate F＊ in the experimental result is consistent with the specific collision energy intensity to total collision energy intensity ratio Es/Et in the simulation. The relations between the production rate F＊ and the specific energy consumption E＊ with collision energy intensity Es and Et are obtained. The simulation result reveals the essential reason for the experimental phenomenon and correlates the mill performance parameter to the collision energy between balls, which could guide the practical application for Quadrilateral ASL.
