思平故里《大理上下四千年》电视专题片解说词编写课题组

大理国是继南诏之后崛起于我国西南的又一个少数民族地方政权,段思平作为大理国的建立者,他的族属、出身等问题一度成为学术界争论的热点.目前,对于他的族属为白族先民白蛮学界已达成共识,而就其出身仍没有定论,有人认为他生于大理,家境贫寒,也有人认为他生于通海,父亲贵为大义宁国的通海节度使.笔者认为不管段思平出身如何,都是值得白族人民及其后嗣子孙祭奠、追忆并为之自豪的一代英主.     

浅议我国建筑垃圾产业化中存在的关键问题

阐述了我国建筑垃圾产业化的重要性与必要性,利用两个建筑垃圾产业化企业实例从正反两方面论述了我国建筑垃圾产业化中存在的关键问题是相应的法律法规和标准规范的及时制定、政府的政策导向和相关部门工作的协调、公众宣传教育的加强。     

A Digital Right Management Model for Distribution of Digital Audiovisual Content

0 IntroductionDue to the success of Internet technology and the emer-gence of wide band network,downloading encoded dig-ital audiovisual content files via HTTP,FTP,etc ,had gainedfavor amongInternet users because of thei mmediate access todesired content . Digital Right Management (DRM) system,can satisfy the content provider by encrypting digital audiovi-sual content andli miting access to onlythose people who haveacquired a proper license to play backthe content[1].DRMas defined bythe …     

BCI—代数的理想和同余

本文首先证明了BCI—代数的理想分解定理,然后研究了BCl—代数的几种同余之间的关系和特征。     

砼强度准则在井壁结构中的应用研究

本文根据井壁结构模型试验结果,对目前具有代表性的复杂应力状态下的砼强度准则进行了分析和对比,找到了一种比较适合于井壁结构的砼强度准则,从而为井壁结构承载能力的合理计算提供了理论基础.     

Electronic Structure and Magnetic Properties of SmCo7-xZrx

The electronic structure and magnetism of SmCo_7-xZr_x alloy are investigated using the spin-polarized MS-X. method. The results show that a few of electrons are transferred to the Sm(5d⁰) orbital due to orbital hybridization between Sm and Co atoms. The exchange interactions between 3d and 5d electrons are more important than the polarization effects of the conductive electrons, thus it is the main reason resulting in the long-range ferromagnetic order in SmCo_7-xZr_x. The Curie temperature of SmCo_7-xZr_x is generally lower than that of corresponding pure Co, which may be explained by the weaker average coupling strength between Co lattices due to some negative couplings mainly occurring of 2e site. The calculated results for the Sm₅Co₃₂Zr₂ cluster may lead to a better understanding of why SmCo_7-xZr_x is stable phase. Since the spin-up DOS peak of d electrons at E_F arises and the bonding of electrons at E_F strengthens with increasing Zr concentration, which results in the internal energy of the system decrease, the stable ferromagnetic order forms in SmCo_7-xZr_x.     

西欧中世纪时期理性主义的复兴

西欧中世纪理性主义，历经唯名论与唯实论之争和理性与信仰之争和16世纪宗教改革运动，最终实现了自身意识主体的回归，为西欧近代思想意识自由发展揭开了序幕。     

论微观辨证

探讨了在中、西医理论不同的前提下，如何合理选择应用现代检测项目作为辩证的指标，并提出微观辩证的新概念。     

Behaviors of the positive temperature coefficient of resistance of poly(styrene‐co‐n‐butylacrylate) filled with Ni‐plated core‐shell polymeric particles

Conductive composite films of poly(styrene‐co‐n‐butylacrylate) copolymers filled with low‐density, Ni‐plated core‐shell polymeric particles were prepared and their behaviors of positive temperature coefficient of resistance (PTCR) were investigated. When the conductive fillers in the composite film were loaded beyond the critical volume, 10 up to 25 vol %, composite films exhibited a unique electrical resistant transition behavior, which the electrical resistance rapidly increased by several orders of magnitude at the critical temperature. The PTCR transition temperature, in general, occurred before the glass transition temperature of polymer matrix. Further increased the conductive filler loading to 30 vol %, the overpacked conduction paths were formed in the entire composite and the PTCR effects became blurred. While the composite film treated with thermal cycle several times from room temperature up to 120 °C, the electrical resistivity increased accompanied with the shift of the PTCR transition to lower temperature. The reason might have been caused by the formed interfacial cracks within the composite film. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 322–329, 2007