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- Xiaoping Tang, Ruiqi Tian, Martin D. F. Wong
- IEEE Trans. on CAD of Integrated Circuits and…
- 2000

In [1], Murata et al introduced an elegant representation of block placement called sequence pair. All block placement algorithms which are based on sequence pairs use simulated annealing where the generation and evaluation of a large number of sequence pairs is required. Therefore, a fast algorithm is needed to evaluate each generated sequence pair, i.e.… (More)

- Xiaoping Tang, Martin D. F. Wong
- ASP-DAC
- 2001

In this paper we present FAST-SP which is a fast block placement algorithm based on the sequence-pair placement representation. FAST-SP has two significant improvements over previous sequence-pair based placement algorithms: 1) FAST-SP translates each sequence pair to its corresponding block placement in O(n log log n) time based on a fast longest common… (More)

- Xiaoping Tang, Martin D. F. Wong
- ISPD
- 2000

The problem of planning the locations of large number of buffers is of utmost importance in deep submicron VLSI design. Recently, Cong et al in [1] proposed an algorithm to directly address this problem. Given a placement of circuit blocks, a key step in [1] is to use the free space between the circuit blocks for inserting as many buffers as possible. This… (More)

- Xiaoping Tang, Martin D. F. Wong
- DAC
- 2002

In this paper, we present a floorplanning algorithm based on sequence pair representation. Our floorplanner has the following important features: 1) It is explicitly designed for fixed-frame floorplanning, which is different from traditional well-researched min-area floorplanning. Moreover, we also show that it can be adapted to minimize total area. 2) It… (More)

- Hua Xiang, Xiaoping Tang, Martin D. F. Wong
- IEEE Transactions on Computer-Aided Design of…
- 2003

In this paper, we present an integrated approach to floorplanningand bus planning, i.e., bus-driven floorplanning (BDF). We are givena set of circuit blocks and the bus specifications (i.e., the net list ofblocks for the buses). A feasible BDF solution is a placement ofall circuit blocks such that each bus can be realized as a rectangularstrip (horizontal… (More)

- Xiaoping Tang, Ruiqi Tian, Martin D. F. Wong
- Proceedings of the ASP-DAC 2005. Asia and South…
- 2005

Existing floorplanning algorithms compact blocks to the left and bottom. Although the compaction obtains an optimal area, it may not be good to meet other objectives such as minimizing total wire length which is the first-order objective. It is not known in the literature how to place blocks to obtain an optimal wire length. In this paper, we first show… (More)

- Ruiqi Tian, Xiaoping Tang, Martin D. F. Wong
- IEEE Trans. on CAD of Integrated Circuits and…
- 2001

Manufacturability of a design that is processed with shallow trench isolation (STI) depends on the uniformity of the chemical-mechanical polishing (CMP) step in STI. The CMP step in STI is a dual-material polish, for which all previous studies on dummy feature placement for single-material polish [3, 11, 1] are not applicable. Based on recent semi-physical… (More)

- Xiaoping Tang, Minsik Cho
- ICCAD
- 2011

Double patterning technology (DPT) is regarded as the most practical solution for the sub-22nm lithography technology. DPT decomposes a single layout into two masks and applies double exposure to print the shapes in the layout. DPT requires accurate overlay control. Thus, the primary objective in DPT decomposition is to minimize the number of stitches… (More)

- Chen Li, Shankar Krishnan, +6 authors Zhe Yang
- 2001

This dissertation explores the theory and applications of Exact Geometric Computation (EGC), a general approach to robust geometric computing. The contributions of this thesis are organized into three parts. A fundamental task in EGC is to support exact comparison of algebraic expressions. This leads to the problem of constructive root bounds for algebraic… (More)

- Yangbo Tang, Zhihua Kou, +7 authors Xia Jin
- PloS one
- 2010

Secondary dengue infections are frequently associated with increased risk for dengue hemorrhagic fever and dengue shock syndrome. Surprisingly, we observed no dengue hemorrhagic fever cases among 353 hospitalized dengue-infected patients including 212 with primary, and 141 with secondary dengue 1 infection in China. To explore virological and immunological… (More)