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  • [外文期刊] Fan Min Qinghua Hu William Zhu 《International journal of approximate reasoning》, ISTIC EI SCI PKU CSSCI 2014 1 Pt.2
    Feature selection is an important preprocessing step in machine learning and data mining. In real-world applications, costs, including money, time and other resources, are required to acquire the featu...
    Feature selectionCost-sensitive learningConstraint satisfaction problemBacktracking algorithmHeuristic algorithmDecision-theoretic rough sets
  • [外文期刊] Shiping Wang William Zhu Qingxin Zhu Fan Min 《International journal of approximate reasoning》, ISTIC EI SCI PKU CSSCI 2013 9
    Covering is a common form of data representation, and covering-based rough sets serve as an efficient technique to process this type of data. However, many important problems such as covering reduction...
    CoveringRough setMatroidGraphRank functionMatching
  • [期刊论文] 《南昌工程学院学报》 - 2006年2期
    Rough set theory is a technique of granular computing. In this paper, we study a type of generalized rough sets based on covering. There are several literatures[ 1,40-43 ] exploring covering-based roug...
    rough setcoveringgranular computingduality
  • [外文期刊] Dirk L. van Oudheusden William Zhu 《European Journal of Operational Research》, ISTIC EI SCI PKU CSSCI 1995 3
    The public bus transit system of Bangkok is one of the largest in the world and operates in a very hectic traffic environment. The development of a specific and computerized trip frequency scheduling m...
    SchedulingBus route management
  • [外文期刊] Aiping Huang William Zhu 《Journal of applied mathematics》, 2014 Pt.1
    The reduction of covering decision systems is an important problem in data mining, and covering-based rough sets serve as an efficient technique to process the problem. Geometric lattices have been wid...
    MatroidsLatticeGeometric
  • [外文期刊] Jingqian Wang William Zhu 《Journal of applied mathematics》, 2013 Pt.7
    Rough sets provide an efficient tool for dealing with the vagueness and granularity in information systems. They are widely used in attribute reduction in data mining. There are many optimization issue...
    MatricesStructureSets
  • [外文期刊] Wenjie Li Terry L. Morkved Todd Maddux William Zhu Heinrich M.Jaeger Luping Yu 《Polymer Preprints》, ISTIC EI SCI PKU CSSCI 1997 2
    In this paper, we report the syntheses of functionalized oligo(phenylenevinylene)s (OPVs) via an orthogonal approach and their diblock-copolymers. We have a strong interest in the self-assembling prope...
  • [外文期刊] Qiang Ni William Zhu Luping Yu 《Polymer Preprints》, ISTIC EI SCI PKU CSSCI 1997 2
    The synthesis of aliphatic polyesters, such as poly-e-caprolactone (PCL), polylactides (PLA), and polyglycolide (PGA), has been attracting increasing attention over the past two decades clue to their w...
  • [外文期刊] William Zhu Wenjie Li Luping Yu 《Polymer Preprints》, ISTIC EI SCI PKU CSSCI 1997 2
    We report here variable temperature 13C NMR Ti (spin lattice relaxation time) data on OPV below and above the liquid crystalline (LC)-isotropic phase transition. Our group has reported the syntheses of...
  • [外文会议] William Zhu 2008
    Granular computing is a methodology for intelligent information processing. It uses granules such as classes, clusters, subsets, and blocks to construct an efficient computational model for complex app...
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