Study of surface cell Madelung constant and surface free energy of nanosized crystal grain

Surface cell Madelung constant is firstly defined for calculating the surface free energy of nanosized crystal grains, which explains the physical performance of small crystals and may be greatly beneficial to the analysis of surface states and the study of the dynamics of crystal nucleation and growth. A new approximative expression of the surface energy and relevant thermodynamic data are used in this calculation. New formula and computing method for calculating the Madelung constant α of any complex crystals are proposed, and the surface free energies and surface electrostatic energies of nanosized crystal grains and the Madelung constant of some complex crystals are theoretically calculated in this paper. The surface free energy of nanosized-crystal-grain TiO2 and the surface electrostatic energy（absolute value） of nanosized-crystal-grain α-Al2O3 are found to be the biggest among all the crystal grains including those of other species.

对于老年期与非老年期焦虑症临床对照分析

目的观察老年期与非老年期焦虑症的临床表现,研究影响焦虑症的相关因素。方法择取2010年12月~2012年12月在我院接受治疗的81例焦虑症患者,81例患者均接受CCMD-3的诊断,并符合焦虑症的诊断标准。将81例焦虑症患者分成老年期组和非老年期组,其中首发年龄≥60岁的40例患者为老年期,首发年龄P<60岁的41例患者为非老年组。针对两组患者的临床资料进行比较和分析,并对两组患者定期采用HAMA量表评定,比较两组患者患者的临床治疗效果。结果在身体疾病方面,老年组明显高于非老年组,从HAMA总分上看,老年组明显高于非老年组,通过2个月的治疗老年组的总有效率低于非老年组的总有效率,组间比较差异显著(P<0.05)。结论在焦虑症的临床特征方面,老年期和非老年期表现出明显的不同,非老年期焦虑症的治疗效果明显高于老年期焦虑症的治疗效果。