利用图像处理实现平面工作台三自由度位移的同步检测

为了实现平面工作台三自由度位移的同步检测 ,研制了图像处理位移检测系统。以CCD相机为核心 ,结合显微镜放大、图像采集和图像处理构成检测系统。图像处理软件用VC编制 ,计算并绘制了工作台三自由度位移随时间的变化关系 ,以及工作台在平面内的运动轨迹。系统的位移检测不受工作台大幅转动的影响。检测系统达到了亚像素级的位移分辨率。选择合适的显微镜放大倍率 ,可使检测系统既有较高的位移分辨率 ,又有一定的位移检测范围     

Improved planarity algorithms

Three planarity algorithms PA-1, PA-2, and PA-3 are presented which are substantial improvements upon those of Demoucronet al. and Rubin, respectively. The algorithms test the planarity of a graphG by attempting to embed it into the plane step by step. If such an embedding can succeed,G is determined as planar and its planar representation is acquired simultaneously. Among others, PA-3 has been implemented in ALGOL on UNIVAC-1100. The program takes about 13.5 seconds to test a graph of 1000 vertices and 2994 edges.     

New planar substrates for the in situ synthesis of peptide arrays

The performance of new cellulose membranes, aminofunctionalized via a PEG spacer, as a solid support in the synthesis of peptide arrays is described. The new membranes are stable to trifluoroacetic acid (TFA) and strong aqueous base for days. These properties extend the scope of synthesis considerably, e.g., more efficient side chain cleavage protocols can be applied which yielded peptides of improved purity. For the first time, cellulose membranes with a loading as high as 5 micromol/cm2 were accessible. Additionally, newly developed polypropylene membranes with hydroxy- or amino functionalities were successfully employed for the SPOT synthesis of peptides and phosphopeptides. The membranes are compatible with antibody binding as well as enzymatic phosphorylation assays.     

Zur Verteilung der Potenzen Gaußscher ganzer Zahlen

Ohne Zusammenfassung

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Computations of K- and L-Theory of Cocompact Planar Groups

The verification of the isomorphism conjectures of Baum and Connes and Farrell and Jones for certain classes of groups is used to compute the algebraic K- and L-theory and the topological K-theory of cocompact planar groups (=cocompact N.E.C-groups) and of groups G appearing in an extension where is a finite group and the conjugation -action on ⁿ is free outside . These computations apply, for instance, to two-dimensional crystallographic groups and cocompact Fuchsian groups.     

平面冲击波高速撞击下Zr41Ti14Cu12.5Ni10Be22.5大块非晶合金的损伤与断裂

 利用二级轻气炮研究了在平面冲击波高速撞击下，Zr₄₁Ti₁₄Cu_12.5Ni₁₀Be_22.5大块非晶合金的损伤与断裂行为。实验结果表明：在高速冲击压缩下，大块非晶合金断裂面的角度小于通常压缩情况的角度，这是由高速撞击下材料极高的应变速率决定的；极高的应变速率变形和局域绝热剪切加热造成局部熔化；在温度和压力的共同作用下，非晶合金发生晶化现象。     

X光分幅相机-平面镜配接方法研究

利用X光谱仪用平面镜备件以及实验室常用五维调节架,设计了X光平面镜与X光分幅相机配接的探索方案,并对系统调节中各元件调节误差带来的影响进行了一定的分析,详细描述了系统的瞄准调节方法和过程.利用激光打靶实验,对X光平面镜与X光分幅相机的配接方法进行了检验.实验过程和结果表明,该方法系统结构和实施都较为简单,可以比较容易地在分幅相机微带上获得经平面镜反射的靶目标针孔像,实现～50 ps的时间分辨、10～20 μm的空间分辨及几十倍的能量分辨.     

The ground states of the classical heisenberg and planar models on the triangular and plane hexagonal lattices

The energies and the spin configurations of the ground states of the classical Heisenberg and classical planar (XY) models with first- and second-neighbor interactions on the triangular and plane hexagonal lattices are obtained. The phase diagrams in theJ ₁–J ₂ plane are determined, whereJ ₁ andJ ₂ are the coefficients of the first- and second-neighbor interactions, respectively. It is noted for the system on the plane hexagonal lattice, that an infinite degeneracy of the ground states occurs in some region of theJ ₁–J ₂ plane and then the study is made under an introduction of an infinitesimal third-neighbor interaction, removing the degeneracy.