Indexing text using the Ziv–Lempel trie

Let a text of u characters over an alphabet of size σ be compressible to n phrases by the LZ78 algorithm. We show how to build a data structure based on the Ziv–Lempel trie, called the LZ-index, that takes 4nlog₂n(1+o(1)) bits of space (that is, 4 times the entropy of the text for ergodic sources) and reports the R occurrences of a pattern of length m in worst case time O(m³logσ+(m+R)logn). We present a practical implementation of the LZ-index, which is faster than current alternatives when we take into consideration the time to report the positions or text contexts of the occurrences found.     

求解非线性规划问题的光滑路径跟踪方法

通过对非线性规划问题的K-T点的光滑路径跟踪方法研究，得出一种针对于既有不等式约束条件又有等式约束条件的优化问题光滑路径跟踪方法，证明了光滑跟踪路径的存在性。     

筒型基础系缆平台沉／拔过程侧摩阻力原型测试

介绍了1999年首次安装在渤海锦州9－3地区多筒基础平台安装施工过程中的侧摩阻力原型测试研究，描述了简型基础上沉和上拔过程中筒壁侧摩阻力的测试系统和测试方法，给出了主要测试结果并与现行规范进行了对比分析，这项成果对筒型基础平台的设计和施工具有直接的参考意义。     

圆形池壁滑模提升系统设计与施工

本阐述了郑州污水处理厂等直径钢筋混凝土消化池，采用滑升模板施工，连续浇筑混凝土提高工效，经过满水和闭气试验，符合设计要求，保证工程质量．取得较好的结果。     

朔望时地球所受引潮力的差别对地震活动的影响

对我国大量的地震史料进行统计分析,发现朔时与望时震次间的关系满足线性回归方程,即y=2.1x+7.39,前者是后者的2.1倍,讨论了地球在朔、望时所受引潮力的差别对地震活动的影响。     

字节全加器及其在无线电测控系统中的应用

对全加器概念进行了推广，并在此基础上给出了使用字节全加器网络的无线电抗干扰算法。通过在实际的无线电测控系统中的应用，结果表明该算法具有良好的无线电抗干扰效果。     

科技文献检索质量对科研工作的影响

本文对科技文献的作用，特征进行了分析。探讨了科技文献检索途径、方法及质量对科学研究活动的影响。     

Halogen Bonding： An AIM Analysis of the Weak Interactions

A series of complexes formed between halogen-containing molecules and ammonia have been investigated by means of the atoms in molecules （AIM） approach to gain a deeper insight into halogen bonding. The existence of the halogen bond critical points （XBCP） and the values of the electron density （Pb） and Laplacian of electron density （V2pb） at the XBCP reveal the closed-shell interactions in these complexes. Integrated atomic properties such as charge, energy, polarization moment, volume of the halogen bond donor atoms, and the corresponding changes （△） upon complexation have been calculated. The present calculations have demonstrated that the halogen bond represents different AIM properties as compared to the well-documented hydrogen bond. Both the electron density and the Laplacian of electron density at the XBCP have been shown to correlate well with the interaction energy, which indicates that the topological parameters at the XBCP can be treated as a good measure of the halogen bond strength In addition, an excellent linear relationship between the interatomic distance d（X…N） and the logarithm of Pb has been established.     

Uniform convergence of Galerkin‐multigrid methods for nonconforming finite elements for second‐order problems with less than full elliptic regularity

In this article we prove uniform convergence estimates for the recently developed Galerkin‐multigrid methods for nonconforming finite elements for second‐order problems with less than full elliptic regularity. These multigrid methods are defined in terms of the “Galerkin approach,” where quadratic forms over coarse grids are constructed using the quadratic form on the finest grid and iterated coarse‐to‐fine intergrid transfer operators. Previously, uniform estimates were obtained for problems with full elliptic regularity, whereas these estimates are derived with less than full elliptic regularity here. Applications to the nonconforming P₁, rotated Q₁, and Wilson finite elements are analyzed. The result applies to the mixed method based on finite elements that are equivalent to these nonconforming elements. © 2002 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 18: 203–217, 2002; DOI 10.1002/num.10004     

“广西建设科技成果数据库”的特点及其应用

从数据库的构成、文献的标引著录、硬件配置及软件程序设计等方面对数据库所具备的各个特点，作了较详细的分析介绍。并列出检索应用实例。