This paper presents an off-line optimal trajectory planning for differential-drive rover through simulation of the dynamic model. The paper starts with the model dynamics of an actual rover built in our space science and technology lab (SSTLab) and controlled by simple PD controllers. Next, the proposed optimization technique used is presented which is called Incremented Particle-Swarm Optimiza...

We present a detection scheme for nanoscale particles based on the gradient force and torque near a tightly focused laser beam. The focus affects the path of nanoparticles passing by and a quadrant detector records the particle trajectory. A feedback system continuously adjusts the laser power and thereby prevents the particles from being trapped. Particle size and shape can be assessed by eval...

Analyzing a free boundary problem for harmonic functions in an infinite planar domain, we prove that in a solitary water wave each particle is transported in the wave direction but slower than the wave speed. As the solitary wave propagates, all particles located ahead of the wave crest are lifted, while those behind it experience a downward motion, with the particle trajectory having asymptoti...

We determine the long time behavior of solutions to the Maxwell-Lorentz equations, which describe a charge coupled to the electromagnetic eld and subject to external time-independent potentials. The stationary solutions have vanishing magnetic eld and a Coulomb type electrostatic eld centered at the points of the set Z at which the external force vanishes. We prove that solutions of nite energy...

Experimental methods based on single particle tracking (SPT) are being increasingly employed in the physical and biological sciences, where nanoscale objects are visualized with high temporal and spatial resolution. SPT can probe interactions between a particle and its environment but the price to be paid is the absence of ensemble averaging and a consequent lack of statistics. Here we address ...

The motion of a charged particle in a linear electromagnetic device can often be analyzed by using the transport matrices. For an electron storage ring, this technique has been applied to yield fruitful results such as the trajectory of the particle distribution center and thebeam sizes and shapes in phase space. Coupling effects among the horizontal, vertical and longitudinal motions are inclu...

Please cite this article in press as: Z. Hu et Vis. Comput. (2008), doi:10.1016/j.imavis Motion trajectory is one of the most important cues for tracking and behavior recognition and can be widely applied to numerous fields. However, it is a difficult problem to directly model the spatio-temporal variations of trajectories due to their high dimensionality and nonlinearity. In this paper, we pro...

A linkage-based chewing device is proposed to perform standardised chewing for use in food evaluation. The linkage for chewing is firstly specified in terms of the trajectory of the first molar and the chewing force, according to the in vivo measurements of the human chewing ranging from grinding (or lateral chewing) to crunching (or vertical chewing). A fourbar linkage is synthesized to achiev...

Time-lapse imaging of cell colonies in microfluidic chambers provides time series of bioimages, i.e., biomovies. They show the behavior of cells over time under controlled conditions. One of the main remaining bottlenecks in this area of research is the analysis of experimental data and the extraction of cell growth characteristics, such as lineage information. The extraction of the cell line b...