场和超引力的对称性

证明规范场和物质场的超对称、内对称 。

颈部动静脉瘘致颅内双侧对称性病变1例报告

颅内双侧对称性病变常见于脑梗死、缺血缺氧脑病、感染中毒性脑病、代谢性脑病、静脉窦血栓、硬脑膜动静脉瘘[1]、变性疾病、肿瘤等。其病因复杂,鉴别困难,临床上易误诊、漏诊。现将我院收治的一例颈部动静脉瘘致颅内双侧对称性病变的病例汇报交流如下。

以双侧颅内多发对称性病变为影像表现的神经精神狼疮1例报告

系统性红斑狼疮(Systemic lupus erythematosus,SLE)是一种常见的多系统受累的自身免疫性疾病,其特征是产生过多的自身核酸抗体,从而形成免疫复合物,侵犯机体各个组织器官,诱发炎症反应和损伤[1]。神经精神狼疮(Neuropsychiatric systemic lupus erythematosus,NPSLE)是系统性红斑狼疮的致死性并发症之一,其临床表现各异、影像学改变缺乏特异性。本文将报道1例系统性红斑狼疮累及双侧白质、基底神经节、丘脑、脑干及脊髓的罕见病例。

Detailed Analysis of Quantum Phase Transitions Within the u(2) Algebra

We analyze in detail the quantum phase transitions that arise in models based on the u（2） algebraic description for bosonic systems with two types of scalar bosons. First we discuss the quantum phase transition that occurs in hamiltonians that admix the two dynamical symmetry chains u（2） u（1） and u（2） so（2） by diagonalizing the problem exactly in the u（1） basis. Then we apply the coherent state formalism to determine the energy functioned. Finally we show that a quantum phase transition of a different nature, but displaying similar characteristics, may arise also within a single chain just by including higher order terms in the hamiltonian.