Airbag Mapped Mesh Auto-Flattening Method

Current software cannot easily model an airbag to be flattened without wrinkles. This paper improves the modeling efficiency using the initial metric method to design a mapped mesh auto-flattening algorithm. The element geometric transformation matrix was obtained using the theory of computer graphics. The algorithm proved to be practical for modeling a passenger-side airbag model. The efficiency and precision of modeling airbags are greatly improved by this method.     

浅议西部大开发

文章从西部地区的历史和现状出发,论述了西部大开发的战略意义。     

金属-有机分子笼催化剂的近期研究进展

酶因在催化过程中展现出特异的选择性和活性而备受关注.在配位自组装过程中,通过调节金属结点的种类和有机配体结构,金属-有机分子笼（MOCs）的空腔可获得多种作用力协同的特殊环境.近年来,对于超分子反应器的研究显示,其空腔结构类似于生物酶,能在催化过程中展现出非常高的反应速率、空间和立体选择性,这一特性引起了科学家们的研究兴趣.文章就近两年MOCs在催化方面的应用研究进展进行了综述.     

ZnCr_2O_4·LiZnVO_4陶瓷的吸—脱湿动力学研究

本文研究ZnCr_2O_4·LiZnVO_4.湿敏陶瓷的吸一脱湿动力学.实验证明:吸湿动力学方程:G=K_a·P_（H_2O）·t;脱湿动力学方程:InG=K_a·e~(Ea/RT)·(?)为陶瓷用于湿度随时间变化的追踪检测提供了理论及实际依据.     

山西科技百年回眸（上）

文章概要回顾了一百年来山西科技事业发展的历程。     

ZnCr2O4陶瓷的NTC传感性能的改进

通过ＺｎＣｒ２Ｏ４陶瓷制备工艺的改进，研究对其ＮＴＣ传感特性的影响。     

自主创新的挑战:2005上海国际汽车展冷思考

文章通过评析2005年上海国际汽车展，以大量翔实的数据和先进的技术，从一个侧面论证了自主创新的重要意义。     

共价化合物的热力学性质与结构的关系(Ⅸ)——R(CH_2)_nR的气相标准生成焓

考虑到影响R_1CH_2_nR_2的气相标准生成焓△_fH_m~(R_1CH_2_nR_2,g)的各种因素,包括端基,链因子(n)及主链上取代基的支化度等。提出了计算正、异构烷烃(RCH_2_nR)的△_fH_m~(g)的计算模型: △_fH_m~(R_1CH_2_nR_2,g)=-74.4kJ·mol~(-1)-4.9T-20.5n+∑m_ib_i其中:-74.4kJ·mol~(-1)为CH_4的△_fH_m~(g),-4.9为主链上端基(-CH_3)对△_fH_m~(R_1CH_2_nR_2)的贡献,T为端基的数目,n为组成上与CH_2相当的-CH_2-的数目,-20.5为其对△_fH_m~(R_1CH_2_nR_2,g)的贡献,b_i为每类取代基的支化度,m_i为b_i的数目。本文的计算值与实验值很好吻合,相关系数为0.9997。     

动态软件体系结构建模方法研究

针对用现有方法对动态体系结构建模的不足，提出了一种软件体系结构抽象模型（SAAM）．sAAM以两种互为补充的形式化方法——面向对象Petri网OPN和π演算为语义基础，其中OPN可以形象地描述软件体系结构的初始化模型和动态行为，π演算可以描述软件体系结构的动态演化．这两种形式化方法通过SAAM集成在一起，并通过相应的支持工具对模型进行分析．在体系结构演化过程中，SAAM利用π演算的相关分析方法，对组件的演化策略和软件体系结构的一致性进行分析，从而可以在系统开发早期发现体系结构级的错误，提高软件质量．利用SAAM对经典实例自动加油站系统进行的建模与分析表明，SAAM直观、易懂，可以有效地刻画系统动态体系结构．     

A new area in the brain associated with learning and memory

A new subdivision, named marginal division (MrD)> consisting of spindle-shaped neurons, has been identified at the caudomedial margin of the neostriatum in the brains of the rat, cat, monkey and human. It is distinguishable from the rest of striatum by special neural connections and many intensely expressed neuropeptides and some monoamines in the fibers, terminals and neuronal somata. Three-dimensional reconstruction of the rat brain reveals that the MrD is a flat pan-shaped area between the neostriatum and globus pal-lidus. Chemical lesions of bilateral MrD in rats will result in severely impaired learning and memory functions, as was demonstrated by double blind Y-maze test. The function of MrD has been shown to be associated with learning and memory by functional magnetic resonance imaging (fMRl) technique in human brain in vivo . Functional neuronal connections are observed between the MrD and hippocampus, amygdala, as well as the basal nucleus of Meynert by chemically induced c-Fos immunohistochemical staining. MrD is a newly discovered part and a universal structure in the neostriatum of the mammalian brain. MrD might very possibly play an important role in processes of the learning and memory.