 This work was supported by the National Natural Science Foundation of China under Grant 61179045. Abstract Motion history image (MHI) and motion energy image(MEI) can recognize simple actions effectively, but they can’t represent the velocity information of the actions. Sometimes in the behavior recognition, we must take the speed into account. For example, touching a person, fierce and frien...

doppler ultrasound can provide important information about vascular problems through the analysis of blood flow wave-form. the purpose of this study was obtaining the normal images of color doppler and estimation of blood flow velocity parameters of femoral artery in rabbits. left and right femoral arteries of 8 healthy adult new zealand rabbits were evaluated. color and spectral doppler images...

One step towards understanding the structure of a flow involves describing the behavior of orbits near selected invariant sets ; particularly that behavior common to all nearby flows. The invariant set chosen is often an isolated invariant set, which means it is the largest invariant set in some (closed) neighborhood of itself, (cf. [1]) A typical example is a hyperbolic (elementary) rest point...

crosslinked poly(acrylic acid)s were prepared using two types of crosslinker by precipitation polymerization method in a binary organic solvent. n,n’-methylenebisacrylamide (mba) and polyethylene glycol dimethacrylate (pegdma-330) were used as low-molecular weight and long-chain crosslinkers, respectively. the effect of various types of crosslinkers on polymer characteristics (i.e., gel content...

One of the classic research topics in adaptive behavior is the collective displacement of groups of organisms such as flocks of birds, schools of fish, herds of mammals and crowds of people. However, most agent-based simulations of group behavior do not provide a quantitative index for determining the point at which the flock emerges. We have developed an index of the aggregation of moving indi...

[1] Dynamical behavior of the one minute resolution Polar Cap (PC) index was studied by using the 1995–2000 data sets. It was found that the probability distribution functions (PDFs) of the PC-index increments display a strong non-Gaussian shape in both positive and negative time intervals, depending on the time of an increment. This indicates that PC-index is not characterized by a global time...

gas motion within the cylinder is one of the major factors that control the combustion process in spark ignition engine. it also has significant impact on heat transfer. both the bulk gas motion and the turbulence characteristics of the flow are important and governing the overall behavior of the flow. an arrangement for obtaining a stratified charge, using port injection, is proposed for a cur...

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