“生态美学”的性质及可能性考察

正如物理学成立的前提是物体必须有结构、物体之间必须有相互联系、有相互作用力、物体运动必须有规律,化学成立的前提是物质实体必须能化合和分解那样,“生态美学”成立的前提是:生态的,必须是美的。但生态的,并非必然是美的,生态与美学之间并没有必然的联系。因此,“生态美学”是不能成立的。

美学核心问题的再辨析与再审定

美是人与其世界在精神上相融为一的一体性状态,美只与人的神圣人性相关,但美学领域里却始终混杂着与人的动物性欲望相关的一系列内容,从而美学领域不仅混乱不堪,而且因为一系列非美学内容对真正美学内容的鹊巢鸠占而使美学处于有名无实的状态。因此,进一步辨析和审定美学的和非美学的具体内容,是美学存在下去并使它发挥实际作用的前提。

Substitution Effects on MgB2 Superconductivity

With the help of supercell method, the first-principle calculations were performed for the study of doping crystal Mg1-xAlxB2 and Mg（B1-yCy）2. Analyzing the variations of the charge distribution and the partial densities of states, we found that the compounds with doping Al to MgB2 compound and/or replacing boron by carbon exhibit new covalent bond effects and unexpected electronic properties, related to superconductivity. The study of the density of states indicates that superconductivity decreases with the increase of Al fraction and carbon concentration. There exists a transition of superconductor to non-superconductor with the change of Al doping fraction. The substitution of boron by carbon results in the decrease of the transition temperature since the decrease of the electron concentration and the lattice constant. The theoretical predictions agree with experimental observations.