Search Results for author: William Zhu

Found 14 papers, 1 papers with code

Hybrid Channel Based Pedestrian Detection

no code implementations28 Dec 2019 Fiseha B. Tesema, Hong Wu, Mingjian Chen, Junpeng Lin, William Zhu, Kai-Zhu Huang

When using a more advanced RPN in our framework, our approach can be further improved and get competitive results on both benchmarks.

Pedestrian Detection

Geometric lattice structure of covering and its application to attribute reduction through matroids

no code implementations16 Dec 2013 Aiping Huang, William Zhu

Second, considering that all the closed sets of a finite matroid form a geometric lattice, we propose a dependence space through matroids and study the attribute reduction issues of the space, which realizes the application of geometric lattices to attribute reduction.

Attribute

Connectedness of graphs and its application to connected matroids through covering-based rough sets

no code implementations16 Dec 2013 Aiping Huang, William Zhu

First, we present an approach to inducing a covering by a graph, and then study the connectedness of the graph from the viewpoint of the covering approximation operators.

Connectivity for matroids based on rough sets

no code implementations5 Nov 2013 Bin Yang, William Zhu

Second, we study the connectivity for matroids by means of relation-based rough sets and some conditions under which a general matroid is connected are presented.

Relation

Rough matroids based on coverings

no code implementations2 Nov 2013 Bin Yang, Hong Zhao, William Zhu

First, we investigate some properties of the definable sets with respect to a covering.

Combinatorial Optimization

A necessary and sufficient condition for two relations to induce the same definable set family

no code implementations9 Oct 2013 Hua Yao, William Zhu

In Pawlak rough sets, the structure of the definable set families is simple and clear, but in generalizing rough sets, the structure of the definable set families is a bit more complex.

Applications of repeat degree on coverings of neighborhoods

no code implementations10 Jul 2013 Hua Yao, William Zhu

First, we investigate under what condition a covering of neighborhoods is the reduct of the covering inducing it.

Cost-Sensitive Feature Selection of Data with Errors

no code implementations13 Dec 2012 Hong Zhao, Fan Min, William Zhu

In this paper, we study the cost-sensitive feature selection problem on numerical data with measurement errors, test costs and misclassification costs.

feature selection

Minimal cost feature selection of data with normal distribution measurement errors

no code implementations12 Nov 2012 Hong Zhao, Fan Min, William Zhu

In this paper, we consider numerical data with measurement errors and study minimal cost feature selection in this model.

feature selection

Matrix approach to rough sets through vector matroids over a field

no code implementations3 Nov 2012 Aiping Huang, William Zhu

First, a matrix representation of an equivalence relation is proposed, and then a matroidal structure of rough sets over a field is presented by the matrix.

Attribute Relation

Test-cost-sensitive attribute reduction of data with normal distribution measurement errors

no code implementations29 Sep 2012 Hong Zhao, Fan Min, William Zhu

In this paper, we introduce normal distribution measurement errors to covering-based rough set model, and deal with test-cost-sensitive attribute reduction problem in this new model.

Attribute Decision Making

Closed-set lattice of regular sets based on a serial and transitive relation through matroids

no code implementations25 Sep 2012 Qingyin Li, William Zhu

Finally, we propose an approach to obtain all the closed sets of the matroid from the semimodular lattice.

Relation

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