图的强交数

简单超图H=(E     

麦克斯韦方程组的研究

库伦电场强度E＆（=q＆／4丌Er。）与外电源的直流电场强度E大不相同。麦克斯韦方程组由四个方程式组成，其中divD=10和curlH=．厂＋aD／at中的D是不相同的。前者为库伦电位移D4（一g4／4ar。），它与电介质的电容率￡无关；后者仅仅为真空媒质中的电通密度D。（=e。E），它与非稳态外直流电源的脉动电场成份有关。把两种不同的D和D。不加区分地捏合在一起，统一用D来表示是不妥的。此方程组的内在矛盾仍然直接影响着如何来定义当代的（绝对）电容率。（绝对）电容率的定义是根椐D=匝呢？还是D自=eE。当代（绝对）电容率的定义需要修改。divD=p和curlH=．，＋aD／at也需要分别找到它们自身应有的表达式。     

Resonance in the electron-doped high-transition-temperature superconductor Pr0.88LaCe0.12CuO4-delta

In conventional superconductors, the interaction that pairs the electrons to form the superconducting state is mediated by lattice vibrations (phonons). In high-transition-temperature (high-T(c)) copper oxides, it is generally believed that magnetic excitations might play a fundamental role in the superconducting mechanism because superconductivity occurs when mobile 'electrons' or 'holes' are doped into the antiferromagnetic parent compounds. Indeed, a sharp magnetic excitation termed 'resonance' has been observed by neutron scattering in a number of hole-doped materials. The resonance is intimately related to superconductivity, and its interaction with charged quasi-particles observed by photoemission, optical conductivity, and tunnelling suggests that it might play a part similar to that of phonons in conventional superconductors. The relevance of the resonance to high-T(c) superconductivity, however, has been in doubt because so far it has been found only in hole-doped materials. Here we report the discovery of the resonance in electron-doped superconducting Pr0.88LaCe0.12CuO4-delta (T(c) = 24 K). We find that the resonance energy (E(r)) is proportional to T(c) via E(r) approximately 5.8k(B)T(c) for all high-T(c) superconductors irrespective of electron- or hole-doping. Our results demonstrate that the resonance is a fundamental property of the superconducting copper oxides and therefore must be essential in the mechanism of superconductivity.     

Optimum of interleaving schemes over combined channels

The optimum choice of key parameters in the interleaving schemes used in RS codes/Viterbi-decoded convolutional codes concatenated coding systems is discussed. At the same time the simulation results and other optional interleaving schemes are given. Biography: QIAO Qin-bao(1946-), male, Associate professor. Research direction: theory and techniques for communications.     

二萜生物碱杀虫药剂的初步研究

介绍白喉乌头中二萜生物碱药剂的提取和配制。通过药剂的杀虫作用探讨了白喉乌头生物碱的药用价值,为进一步开发和研制新型的植物性药剂作了一些有益的探索。     

我国罕见的有色宝石矿物--透视石

本文报导了作者对瓣近在我国发现的透视石所做的测定结果。在实测过程中，使用了显微硬度计、宝石显微镜、偏光显微镜、平面光删光谱仪、激光光谱仪、Ｘ射线自动衍射仪以及红外光谱仪等仪器。所得的结果补充了前人工作的不足，文中最后还对透视石的宝石学价值和了简要的评述。     

发电机机座隔振系数的测试研究

笼形机座隔振系统是大功率发电机定子机座隔振系统的一种新型结构。对ＡＳＴＨＯＭ３３０ＭＷ发电机笼形隔振系统进行了实验研究和分析。给出了这种机座隔振系数的定义以及隔振系数、机座振动形态的测试和结果，并介绍了试验用激振器的研制和使用。本研究对发电机定子的隔振研究和设计具有实际意义。     

常微分方程（组）的RunaeKutta异步并行算法及在多Transputer系统上的实现

并行算法的研究应以实用性、可实现性以及最大的并行处理效率为出发点．在解常微分方程（组）ＲｕｎｇｅＫｕｔｔａ并行算法的基础上进一步提出了一种针对Ｔｒａｎｓｐｕｔｅｒ并行多处理机系统实现的异步并行算法，该算法可划分成若干ＯＣＣＡＭ并发进程一一映射到多个处理机上且进程间采用异步通讯机制．作为一个应用实例，文中用ＯＣＣＡＭ语言编写了三阶ＲｕｎｇｅＫｕｔｔａ异步并行算法程序，做了算例，并获得了令人满意的结果．实例表明，由于该算法避免了进程间同步通讯等待所需的时间开销，而使算法的效率得以提高．     

闽北丘陵山地生态果园结构模式与综合效益探析

根据生态学原理和系统工程的研究方法,分析闽北山地果业开发的现状,提出丘陵山财生态果园的建设思路与开发模式,并探索与此相应的配套技术。建立以果树产栽培技术为龙头,以果园套种优质牧草为纽带的良性循环体系。种草防治水土流失,改良红壤、培肥地力、菌草结合,发展沼气、同时以草代料、发展牧业、渔业、食用菌业和气能源业,提高综合利用效率,促使丘陵山地农业综合开发的经济、社会、生态效益得以优化发挥。     

调和函数的一个积分恒等式

本文推导出调和函数的一个积分恒等式,并把这个结果推广到方程△_pu=0(P>1)的解的情形.