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Crowd motion segmentation problem is a hot issue in crowd behavior analysis and action recognition. A number of methods have been proposed to tackle this problem. Among the existing methods, most used flow dynamics to model the crowd motion, with only a few taking the collective property into consideration. In this paper, we proposed a crowd motion segmentation approach based on streak flow and crowd...
Flower pollination algorithm (FPA) is a new meta-heuristic optimization algorithm that mimics the real life processes of the flower pollination. In this study, visual tracking is regard as a process of optimal reproduction of flowering plants. An FPA-based tracking architecture is proposed and its tracking accuracy and speed are compared with particle filter and mean shift. Comparative results indicate...
In the kinematic calibration of robots, an essential step is to develop an error model. Recently, the product of exponentials (POE) due to its singularity-free property has been widely used in the calibration. However, the previous error models based on POE are of linear kind. In this paper, to investigate the applicability of the liner model, a second order error model is established. Based on the...
To appropriately meet increasingly diverse customer needs, services are committed to certain configuration in a paradigm similar with product mass customization. This paper presents a hybrid approach based on ontologies and rules to achieve representing, acquiring and reasoning service configuration knowledge. Structural knowledge is represented by ontology and formalized by OWL, resulting in well-defined...
At the present, tactile sensor technology can be found many applications in many industrial and medical areas, and is still attracting more and more research attention. In this paper, a new tactile sensor, focusing on the characterization of different tissues, is designed. Tissue characterization plays an important role in minimally invasive surgery which lacks the force feedback. Consider a compatible...
To respond to diverse customer needs, services are customized and committed to certain configuration in a paradigm similar with product mass customization. In order to achieve efficient and effective service configuration in a sharable and reusable way, a hybrid approach based on ontologies and rules for representing and reasoning service configuration knowledge is presented in this paper. Structural...
Piezoelectric fuel injectors provide a means to lower emissions, noise and fuel consumption in advanced IC engines by enabling complex injection rate profiles - referred to a “rate shaping”. However, consideration of the flow rate non-linearity, piezostack hysteresis, and hydro-mechanical dynamics is required to achieve precise control of rate shaping. The goal of the effort described here is to develop,...
Piezoelectric fuel injectors provide a means to reduce fuel consumption, noise and emissions in modern IC engines. This paper summarizes an effort resulting in within-a-cycle estimation of injected fuel for “rate shaped” profile. A reduced order model is introduced by simplifying a physically-based, experimentally-validated simulation model. The estimation algorithm is derived from the model, implemented...
Abstract: In view of using symmetrical normalization for smaller deviation than standard normalization for the multi-tau photon correlator in the whole delay time range but need more monitor channels. We suggest employing symmetrical normalization when the lag time larger than 16384 and standard normalization smaller than 16384. Deviation of symmetrical normalization and standard normalization was...
The current paper presents a miniaturized tactile sensor which can be used in robotic-assisted surgery for mitral valve repair. The tactile sensor can localize the position of mitral annulus among the surrounding tissues, leaflet and atrium. The tactile sensor is miniaturized and fabricated on the extremity of a catheter. A test setup is also prepared by using an elastomeric phantom of mitral valve...
The determination of particle size distribution (PSD) deals with ill-posed problems in dynamic light scattering (DLS) technique and small perturbation in measured data will cause serious errors in recovered PSD. In this paper, we proposed a modified technique which solves the second order correlation function directly. Simulated results show that this technique significantly reduced the inversion...
Manufacturers are combining products and services to provide greater value to the customers. The bundling of physical products and product extension services (PESs) is the strategy adopted by manufacturers most frequently. To enhance customer value, the variety of PESs significantly increases to respond to different kinds of customer needs, which inevitably results in the configuration problem. In...
In dynamic light scattering experiments, the light intensity scattered by brownian colloidal particles is regarded as a stationary stochastic process. According to the theory of stationary stochastic process, a method for generating the light scattering signal is proposed. This method establishes an auto-regressive (AR) model by the autocorrelation function (ACF) of scattered light signal. When white...
A new type of pole-climbing Robot mechanism is proposed, the configuration and characteristics of the mechanism are introduced. The Robot mechanism action of hold pole, put pole, main move, process of climbing pole, fixed to the pole, and across barriers are analysed. The principal theory which is used in the pole-climbing Robot is elaborated, the control system of pole-climbing robot is designed...
Attendance check is important in the work of students management. In this paper a students attendance check and personal identification system design based on fingerprint Sensor FPS200 and wireless communication module nRF903 is proposed. It is included fingerprint identification terminal equipment, floor relay station, building relay station and control center. We design a mix star network topologic...
The interharmonics monitoring system of power network was developed based on virtual instrument. The system consists of sensors, signal conditioning circuits, data acquisitions and computers. Within the system, the method of multiple signal classification(MUSIC) method was applied to virtual instrument by using the MATLAB script node in LabVIEW, the parameters of interharmonics are identified, some...
A feature-based image mosaic method is introduced in this paper. Fast image mosaic has been realized by using the Harris arithmetic operators to withdraw the vertex features, using the Local Area Correlation Coefficient (LACC) method to match the vertex characteristic, and using the overlap area linear transition method to fuse images to eliminate obvious edge seam. The experiment proved that the...
In order to realize auto focus during CD-SEM imaging process, the structure of image and scanning model is explained. The principle and the performance of image sharpness evaluation function, such as pixel gray variance function, gradient function, gray entropy function and SMD function, are analyzed in this paper. The experiment shows that all listed methods can evaluate the image sharpness correctly...
A length measurement device in plastic film production line is designed in this paper. The device controlled by the main subordinate micro-controller consists of photoelectric detection, inkjet printing code, stepper motor drive, voice prompt and fault alarm, etc. Color scale sensor ZLS, XJ128-type nozzle of UK XAAR Company and single IC PMM8713 are employed in photoelectric detection, inkjet printing...
The process of photon correlator used in the Photon Correlation Spectroscopy technique is described. Because of the restriction of hardware resource, linear correlator with limited channels cannot resolve the contradiction between time resolution and dynamic range. To overcome the shortcoming of linear correlator, the architecture of non-linear correlator is investigated. To implement such a construction...
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