shear-wave velocity ( ) is an important parameter used for site characterization in geotechnical engineering. however, dispersion curve inversion is challenging for most inversion methods due to its high non-linearity and mix-determined trait. in order to overcome these problems, in this study, a joint inversion strategy is proposed based on the particle swarm optimization (pso) algorithm. the ...

[1] Over the decade 1996–2006, acoustic sources located off central California (1996– 1999) and north of Kauai (1997–1999, 2002–2006) transmitted to receivers distributed throughout the northeast and north central Pacific. The acoustic travel times are inherently spatially integrating, which suppresses mesoscale variability and provides a precise measure of ray-averaged temperature. Daily avera...

Accurate and real-time travel time information for buses can help passengers better plan their trips and minimize waiting times. A dynamic travel time prediction model for buses addressing the cases on road with multiple bus routes is proposed in this paper, based on support vector machines (SVMs) and Kalman filtering-based algorithm. In the proposed model, the well-trained SVM model predicts t...

Prediction of travel times is a vital function of many advanced traveler information systems. In this study, an experimental analysis of the relationship between instantaneous travel time and real travel time is carried out and a method to predict freeway travel times using a linear model is proposed. The proposed method is applied to a data set of the Hanshin Expressway. The implementation pro...

Modelling access to services, using cost path analysis and distance decay models, can be improved if travel time rather than just distance is taken into account. If just straight line distance is used then traffic congestion in urban areas and rough bendy rural roads are not considered in the analysis and the results are subsequently distorted. An accurate road network layer that shows travel s...

In this model it is supposed that shocks contributing additively to the amount of damage occur at random points of time. Common assumptions are that the sequence of shock amounts and the process N (t), say counting their number are stochastically independent and that the shock amounts ε1 , ε2...(Where εi is the increment of the damage caused by the i-th shock) are independent and identically di...

A police car, manned round the clock by two officers, costs at least $300,000 annually. With efficient management of this resource, police services can be improved without raising taxes. This ArcView extension allows police planners to design patrol districts and to evaluate them by displaying various performance measures. The extension uses a spatially distributed queuing system (the Larson Hy...