供应链管理复杂系统三层-回声模型的研究

供应链系统中各个成员按照进攻、防御、条件交换、粘着、资源变换、选择性交换、条件复制、交叉复制、创新等多种能力在匹配能力、匹配速度、匹配时间等三维空间中相互作用。在以市场、市场营销、企业哲学、经营理念、管理、技术等核心资源为纽带的基础上形成的一个复杂适应系统（CAS）,就该问题进行了研究。     

CAS范式在南水北调东线水资源供应链管理中的应用

将CAS范式引入南水北调东线水资源供应链管理项目,研究其复杂性、动态性和整体性,为水资源配置与调度提供理论依据．从供应链的结构、节点企业以及外部环境等角度,分析其复杂自适应性．指出基于软件平台Swa肿仿真的可行性和有效性,从复杂性的角度提供了供应链量化建模仿真的理论基础。     

图书分类法发展历程回溯

回溯了我国图书分类法的产生和发展过程,包括我国古代图书分类法、近代图书分类法以及现在广泛使用的图书分类法。     

基于CAS理论的出版企业技术创新行为模式研究

基于复杂适应系统(CAS)理论,分析了出版企业技术创新系统是一个复杂适应性系统,论述了出版企业技术创新的行为模式。其中,基于复杂的刺激-反应原理,构建了出版企业技术创新系统的主体行为模式;基于复杂的适应-学习原理,构建了出版企业技术创新系统的整体行为模式;基于复杂的层次-涌现原理,构建了出版企业技术创新系统的演化行为模式。复杂性科学的非线性、非均衡、复杂整体论的新的思维模式,为研究出版企业技术创新的行为模式提供了一种新的视角。     

Room-temperature facile synthesis of MnO2on carbon film via UV-photolysis for supercapacitor

A facile UV-photolysis method has been developed to synthesize birnessite-type MnO_2 nanosheets on carbon film at room temperature for supercapacitor electrode materials. The results clearly demonstrated that the specific capacitance of carbon/MnO_2 composite electrodes was controlled by the adjustable UV-photolysis reaction time in KMnO_4 solution. For the optimized composite electrode obtained after 2 h reaction, a superior specific capacitance of 277 Fg~(-1) was achieved at current density of 0.2 Ag~(-1). This finding suggests that UV-photolysis is a potential method to fabricate MnO_2 on carbon film for supercapacitor.     

甘薯中微量铝的分光光度法测定

采用分光光度法与Al-CAS-CTMAB-OP四元络合物显色相结合，对甘薯中的铝含量进行了测定。A1^3 浓度在0-0．24μg／mL范围内遵守朗伯-比耳定律，相关系数r＝0．9996。回收率为91．4％-102．6％，对甘薯样品测定的结果为190．8μg／g，δ＝1．59，RSD＝0．83％(n＝5)。因甘薯中铝含量相对较高，建议在开发健康食品时应作特殊的前处理或进一步改良品种。     

A kinetic, spectral and theoretical investigation on the role of oxygen in the radiolytic oxidation of a sorbityl cyclic acetal

The oxidation process of the cyclic acetal sorbitylfurfural (SF) has been thoroughly examined from the kinetic, spectroscopic and theoretical point of view. Oxidation has been initiated by the radiolitically produced OH radical in the presence of variable oxygen amounts. Two competing reaction pathways are evidenced which lead to quite different products, although they do not affect the acetal ring integrity. The peroxidation of the hydroxylated furanic ring (k ₄=(6.1±0.9)×10⁸ M⁻¹ s⁻¹) maintains the ring structurevia HO₂^• elimination (k ₆=(1.9±0.4)×10⁵ s⁻¹). Unlike that, the peroxidation of the pseudo-allylic radical (k ₅=(1.9±0.9)×10⁹ M⁻¹ s⁻¹), formedvia β-cleavage, fixes the destructured intermediate, leading to a tetroxide, which slowly decomposes through a Russell mechanism (k ₈=(2.3±0.6)×10² s⁻¹). It is confirmed that the steady state concentration of the tetroxide is very low, which suggests a molar absorption coefficient for it around 1.2×10⁴ M⁻¹ cm⁻¹ at 265 nm. The end products of the latter pathway have been characterized as carboxylic and butenald-sorbitol derivatives. The kinetic and spectral data of every step of the process have been fitted by the above outlined mechanism. The energetics of the mechanism has been detailed byab initio computations as well, carrying further substantiation to it. Semi-empirical calculations were also employed to describe the spectral properties of each intermediate.     

Temperature-dependent structural study of microporous CsAlSi5O12

CsAlSi₅O₁₂ crystals were synthesized at high temperature by slow cooling of a vanadium oxide flux. Single-crystal X-ray diffraction structure analysis and electron microprobe analyses yielded the microporous CAS zeolite framework structure of Cs_0.85Al_0.85Si_5.15O₁₂ composition. High-temperature single-crystal and powder X-ray diffraction studies were utilized to analyze anisotropic thermal expansion. Rietveld refined cell constants from powder diffraction data, measured in steps of 25 °C up to 700 °C, show a significant decrease in expansion above 500 °C. At 500 °C, a displacive, static disorder-dynamic disorder-type phase transition from the acentric low-temperature space group Ama2 to centrosymmetric Amam (Cmcm in standard setting) was found. Thermal expansion below the phase transition is governed by rigid-body TO₄ rotations accompanied by stretching of T-O-T angles. Above the phase transition at 500 °C all atoms, except one oxygen (O6), are fixed on mirror planes. Temperature-dependent polarized Raman single-crystal spectra between −270 and 300 °C and unpolarized spectra between room temperature and 1000 °C become increasingly less resolved with rising temperature confirming the disordered static-disordered dynamic type of the phase transition.     

Changes of Working Styles in a Computer Algebra Environment – The Case of Functions

This study is an empirical investigation of 11th graders at a German high school (Gymnasium). Working over a 24-hour period in a computer lab, we investigated students' use of quadratic functions with `Derive', and trigonometric functions with `Mathplus' (or `Theorist' for Macintosh). We were particularly interested in the working styles of students while they solved problems and looked for changes in these styles, as compared to traditional paper and pencil activities. While students worked on the computer, their activities (such as inputs from the keyboard, menu choices or mouse movements) were saved by a special program, which ran in the `background'. We are interested in the possibilities of developing a research method based on these `computer protocols'. The study should be seen as an exploratory study for developing hypotheses for further empirical investigations.This revised version was published online in September 2005 with corrections to the Cover Date.