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This paper described one differential measurement method by using a lock-in amplifier as null detector, which can directly compare one high-purity sinusoidal [HPS] produced by a commercial precision calibrator with one stepwise-approximated sine wave [SASW] generated by programmable Josephson voltage standard [PJVS] in fundamental root-mean-square [FRMS] values at NIM. The preliminary results show...
Flow cytometry has wide applications in cell biology and medicine. Compared with conventional fluorescence labeling, light scattering can be adopted as a label-free cytometric method. Integration of optics with microfluidics, the optofluidic technology may help for the advancement of the next generation miniaturized label-free cytometry. Optofluidic label-free cytometry that can obtain two dimensional...
In previous work we developed a support vector machine (SVM) approach for detection of microcalcifications (MCs) in mammogram images, which was demonstrated to outperform several existing methods for MC detection in the literature. In this work, we explore whether we can further improve the performance of the SVM detector by exploiting the fact that MCs are inherently invariant to their spatial orientation...
Localizing license plate in an image enables vehicle detection and identification. Processing at high-definition (HD) image allows a better access of visual information but also enhances the necessity of multi-resolution analysis because license plates may appear in various sizes and shapes. A great computational burden is accompanied by processing the great number of candidate windows during multi-resolution...
Robotics has been paid a lot attentions because of its wide applications, like explore unknown planet or rescue people after earthquake or fire. In a group of mobile robots, robots are usually weak and are easy to get crash, especially working in dangerous or harsh environment. Unfortunately, to the best of our knowledge, only a few studies address on robot failure, especially transient failure. Therefore,...
In this paper, we give a survey on fault tolerant issue in distributed systems. More specially speaking, we talk about one important and basic component called failure detection, which is to detect the failure of the process quickly and accurately. Thus, a good failure detection method will avoid the further system lost due to process crash. This survey provides the related research results and also...
Consider a system composed of mobile robots (mobile sensors) that move on the plane, each of which independently executing its own instance of an algorithm. Given a desired geometric pattern, the flocking problem consists in ensuring that the robots form this pattern and maintain it while moving together on the plane. In this paper, we look at the flocking problem in the presence of faulty robots,...
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