This paper proposes a simulation model for analysing error propagation in buffer spatial analysis in a vector-based geographical information system. Since spatial data stored in GIS is not error-free, errors propagate and accumulate over GIS operations. Therefore, there is necessary to study error propagation in the process. The proposed model in this study measures the propagated error in buff...

We discuss error propagation in the slope-based and the difference-based wavefront estimations. The error propagation coefficient can be expressed as a function of the eigenvalues of the wavefront-estimation-related matrices, and we establish such functions for each of the basic geometries with the serial numbering scheme with which a square sampling grid array is sequentially indexed row by ro...

Location information of nodes in an ad hoc sensor network is essential to many tasks such as routing, cooperative sensing, and service delivery. Distributed node self-localization is lightweight and requires little communication overhead, but often suffers from the adverse effects of error propagation. Unlike other localization papers which focus on designing elaborate localization algorithms, ...

Group decoding receivers [1], [2] (GDRs) are an attractive way to improve performance of multiuser systems with highly correlated users. These reduced complexity receivers use jointly the coding information of a subset of users and the multiuser information. Performance of GDR for synchronous multiple-access channels is upper bounded in [2]. However, upper bounds of GDR for asynchronous multipl...

Conventional time-delay estimators exhibit dramatic performance degradations in the presence of multipath signals. This limits their application in reverberant enclosures, particularly when the signal of interest is speech and it may not possible to estimate and compensate for channel e ects prior to time-delay estimation. This paper details an alternative approach which reformulates the proble...

In this paper, we propose a novel cooperative transmission scheme based on a symbol constellation expansion over Rayleigh and Rician multipath fading channels. The proposed scheme expands the symbol constellation through a unique combination of the original symbols, thus increasing the minimum distance among the single points. We also analyze the bit error rate (BER) performance showing that th...

—Regarding to the problems of low rate of convergence and fault saturation for neural network classifier based on the algorithm of error back propagation during the signal recognition, bee colony algorithm is applied in this paper so as to extract combined feature module of signal and suggest three different algorithms including algorithm with rapidly support, super self-adaption error back pr...

The assay on anhydrous basis is a mathematically derived value from an experimental results of assay and water content tests. The results of assay and water content tests are determined, separately, on as-is basis. The industry-accepted formula for assay on anhydrous basis = (assay on as-is basisx100)/(100-%water). Statistically, the two variables involved in accepted formula are assay on as-is...