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- DuyBach Bui, Daeyoung Kim
- Proceedings. 14th International Conference on…
- 2005

Existing range-based localization algorithms are superior only when a high accuracy node-to-node measured distance exists. This assumption is actually difficult to satisfy with current ranging techniques used in tiny sensor nodes. Meanwhile, range-free localization algorithms work independently of ranging error but can only produce limited node accuracy. In… (More)

- DuyBach Bui, Daeyoung Kim
- 2004

A localization algorithm is an important component in a wireless sensor network. The requirements for such an algorithm include high estimated node position accuracy and low communication overhead. In an evolvable sensor network, where some running sensor nodes exhaust after a working period and some new nodes are added to maintain the proper operation of… (More)

- DuyBach Bui, G . ChenDepartment
- 1999

We present a novel set of descriptors for recognizing complex patterns such as roadsigns, keys, aircrafts, characters, etc. Given a pattern, we rst transform it to polar coordinate (r;) using the centre of mass of the pattern as origin. We then apply the Fourier transform along the axis of polar angle and the wavelet transform along the axis of radius r.… (More)

A combination of Proper Orthogonal Decomposition (POD) and In Situ Adaptive Tabulation (ISAT) is proposed for the representation of parameter-dependent solutions of coupled partial differential equations (PDE). The accuracy of the method is easily controlled by open parameters that can be adjusted according to the users needs. The method is tested on a… (More)

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