从耗散结构理论看体育学习的有序性

本文以耗散结构理论为依据，以体育教学论为根本出发点，分析了体育教学过程中体育学习的耗散结构特征．认为体育学习过程就是耗散结构的形成过程，是一个从无序向有序，从低级有序向高级有序的转化过程．     

中锰白口铸铁热塑性变形规律的探讨

为开发磨球成形新工艺——水平连铸白口铸铁棒材斜轧成球的工艺。采用高温压缩、高温扭转试验方法，研究了中锰白口铸铁的高温塑性变形能力，测定了温度与极限变形率，温度与变形抗力的关系曲线。对塑性变形后的组织进行了分析。结果表明：中锰白口铸铁在８５０～１０００℃具有良好的塑性变形能力，热塑性变形后碳化物成断网状和孤立块状，从而可使中锰白口铸铁的韧性提高     

应用于MIS中的结构管理设计法

提出了MIS结构管理器的概念及实现方法,并在此基础上提出了一种用结构管理器控制MIS系统结构的设计方法。该方法可以提高MIS系统自动生成的程度、提高系统的可维护性、缩短MIS系统的开发周期,具有广泛的适应面。     

简单邻域平均图像去噪算法的改进研究

图像去噪是图像增强的重要内容,邻域平均法是一种简单快速的图像去噪技术,但简单邻域平均法使图像去噪的同时,也会使图像变得模糊,弱化或丢失了图像的边缘和细节。本文对简单邻域平均法进行了一定的研究,给出了几种(5种)若干图像去噪的改进算法。     

冠醚配合物:[K(DB18-C-6)(CH3COCH3)][BPh4]的合成与晶体结构

研究了DB18-C-6 与KBPh4的反应,得到了配合物[K(DB18-C-6)(CH3COCH3)][BPh4].通过熔点、红外光谱、元素分析、单晶X-射线衍射对该配合物进行了表征. 配合物为单斜晶系,空间群为C2/c,晶体学数据a=2.175 6 (17) nm,b=1.999 6(16) nm,c=2.056 8(15) nm,β=110.019(13)°,V=8.407(11)nm3,Z=8,Dcalcd=1.227g/cm3,F(000)=3 296,R1=0.050 4,Wr2=0.110 4.配合物由一个[K(DB18-C-6)(CH3COCH3)]+配阳离子和一个[BPh4]-配阴离子组成. 在配阳离子[K(DB18-C-6)(CH3COCH3)]+中,K除与DB18-C-6的6个O原子成键外还与一个CH3COCH3分子中的O原子成键.配阳离子{[Na3(15-C-5)]3(SCN)}2+与配阴离子[BPh4]-通过静电相互作用形成中性配合物.     

锡表面Mo(W)-S-Sn彩色簇合物膜的组成与结构研究

通过(NH4)2Mo(W)S4溶液浸渍,在金属Sn表面获得了不溶性且具有金属光泽的Mo(W)-S-Sn彩色簇合物膜。FT-IR、F-IR、FT-Raman、XPS和AES研究表明,簇合物膜中存在Mo(W)-S-Sn、端基Mo(W)-S和端基Mo(W)-O键,膜层由Mo(W)、S、Sn和O元素组成,膜为多分子层结构,从AES深度分布曲线的组成恒定区求得了元素的相对原子百分数和膜层厚度。     

Structure,scale and emergence

In this paper I consider the structures that chemists and physicists attribute at the molecular scale to substances and materials of various kinds, and how they relate to structures and processes at other scales. I argue that the structure of a substance is the set of properties and relations which are preserved across all the conditions in which it can be said to exist. In short, structure is abstraction. On the basis of this view, and using concrete examples, I argue that structures, and therefore the chemical substances and other materials to which they are essential, are emergent. Firstly, structures themselves are scale-dependent because they can only exist within certain physical conditions, and a single substance may have different structures at different scales (of length, time and energy). Secondly, the distinctness of both substances and structures is a scale-dependent relationship: above a certain point, two distinct possibilities may become one. Thirdly, the necessary conditions for composition, for both substances and molecular species, are scale-dependent. To know whether a group of nuclei and electrons form a molecule it is not enough to consider energy alone: one also has to know about their environment and the lifetime over which the group robustly hangs together.     

有界复形的 Modi ed Ringel Hall 代数的结构常数

设k是有限域.A是k上的满足一定有限性条件的本质小的遗传阿贝尔范畴.本文研究了有界复形范畴的modified Ringel—Hall 代数MH(A)中零微分复形乘积的结构常数，给出了它们与A的Ringel-Hall 代数H(A)的Hall数之间的关系.     

某通用小型汽油机箱体有限元分析及结构优化

该文运用有限元法对某通用小型汽油机箱体进行了结构强度与刚度分析，结果表明右箱体主轴承位置最大变形量过大，刚度较差。为此对右箱体主轴承区域进行拓扑优化。优化方式为：增加右箱体主轴承处加强筋数量、增加壁面厚度以及在壁面上添加加强条。通过计算表明，该优化方式能使箱体的最大应力与应变大大下降，使其强度刚度有了较大提升，箱体的结构更趋合理。     

Mechanisms functional underlying the characteristics structural and of acupoints

Acupoints are particular areas on the surface of the body through which the Qi and blood of the Zang-fu organs and meridians flow. Acupoints can respond to stimuli and reflect syndromes. Research on the essential morphology of acupoints has two key focuses： anatomical structure and physiological func- tion. The structure is the material and anatomical basis for the function, while the function is the manifes- tation of the structure. The two factors not only have profound significance for our understanding of the essence of acupoints, but also have great value for clinical acupuncture and moxibustion practice. Based on the structural and functional characteristics of meridians under different physiological and pathological con- ditions, this paper illustrates the essence of acupoints and explores the rules and biological basis of the acu- point functions induced by acupuncture and moxibustion.