Investigation of the Potts Model on Triangular Lattices by the Second Renormalization of Tensor Network States

We employ the second renormalization group method of tensor-network states to investigate thermodynamic properties of the ferromagnetic and antiferromagnetic Potts model on triangular lattices. From the temperature dependence of the internal energy and the specific heat, both the critical temperatures and critical exponents are evaluated. For the q = 3 antiferromagnetic Potts model, the critical temperature is found to be Tc = 0.627163±0.000003, which is at least one order of magnitude more accurate than that obtained by other methods.     

8-羟基喹啉衍生物及其锌配合物的合成

<正>自从1987年美国Kadak公司C.W.Tang及其合作者[1]首次用8-羟基喹啉铝(Alq3)作为发光层,得到了在较低直流电压(约10V)驱动下高亮度(1000cd/m2)的有机电致发光材料以来,以8-羟基喹啉为配体的有机金属电致发光材料的研究就一直成为人们重点关注的内容[2-5];近年来,人们不断对8-羟基喹啉配体进行化学修饰[6-12],在喹啉环结构上引入不同基团,改变分子轨道中HOMO和LUMO能级差,使配合物发光峰改变,成功合成出各种发不同荧光的有机电致发光材料。     

Translation invariant tensor product states in a finite lattice system

We show that the matrix (or more generally tensor) product states in a finite translation invariant system can be accurately constructed from a same set of local matrices (or tensors) that are determined from an infinite lattice system in one or higher dimensions. This provides an efficient approach for studying translation invariant tensor product states in finite lattice systems. Two methods are introduced to determine the size-independent local tensors.     

不同透析方式对山区透析患者生活质量的影响及相关因素分析

目的探讨不同透析方式对山区维持性透析患者生活质量的影响及相关因素分析。方法选取进行维持性透析患者90例（腹膜透析和血液透析患者各45例）,使用KDQOL—SFTM量表对两者进行生活质量评价,比较两种透析患者生活质量的差异,并对其临床资料进行分析,探讨其影响因素。结果腹膜透析组患者总体健康、疼痛评分、活力、心理健康总分以及KDTA总分、症状影响、睡眠质量均明显优于血液透析患者（均P〈0．05）。透析年限、文化程度及年龄是36项健康相关生存质量调查（SF-36）的影响因素（P〈0．05或001）,透析年限、文化程度是KDTA的影响因素（P〈0．05）。结论山区终末期肾病患者进行腹膜透析其生活质量明显优于血液透析。