The traditional microwave radar can not detect beyond the horizon. So it can not meet the demands of early warning and protection of exclusive economic zones, etc. High Frequency Surface Wave Radar utilizes the principle of vertically polarized electromagnetic wave diffracting along the air-water interface. Its detection range achieve up to hundreds or even thousands
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The traditional microwave radar can not detect beyond the horizon. So it can not meet the demands of early warning and protection of exclusive economic zones, etc. High Frequency Surface Wave Radar utilizes the principle of vertically polarized electromagnetic wave diffracting along the air-water interface. Its detection range achieve up to hundreds or even thousands
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The article studies and summarizes the current technology of image-based spam filtering and the algorithm of image-based division. It also analyzes the performance of a variety of spam detection algorithms. According to the types of image-based spam, the article proposes two algorithms to locate the text range, and the final algorithm of two-rank-filtering-based image detection.
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Recently along with the development of the computer and internet technology, people can transfer any multimedia information, such as image, video, audio and text. Meanwhile many free and open-source steganography software appeared in the internet, that makes anyone can communicate secretly. If this technology was taken by the terrorist, then it will be a disaster.
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With different images of redundancy, complementarity, new image of better quality, more information can be obtained by the image fusion. As an important aspect of data fusion, image fusion with its intuitive nature of the data, visualize, win a wide range of attention and study.Image fusion is divided into three part:the pixel-level, the feature-level, and
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With the rapid development of computer hardware and software technologies and theInternet technologies, the media types used in their daily life and work time have transferredfrom simple text to text, image, audio and video. And the trend from two-dimensional tothree-dimensional becomes more and more evident. Especially in virtual reality, simulation andvirtual manufacturing and other related
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Cardiovascular disease has been known as “the first killer” to threaten human health since twenty-first Century, the heart disease incidence rate is increasing higher at current time. Timely diagnosis of heart disease as well as to improve the diagnosis rate is very important. Heart sound is produced by the vibration of heart wall and large
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About seventy percent information that is acquired and transmated by human come from visual information, but there are many uncertain factors exist in the daily life, for example rain and snow, dense fog, dust tornado. The image will be blurred by these factors. And now we should improve the quality of the original image with
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The probability of machinery failure is very big for rolling bearing damaged in mechanical equipment failure. The working conditions of the bearing will directly influence the operation of the whole machinery and equipment. Methods on rolling bearing fault diagnosis are different. With the development of science and technology, it puts forward new requirements to the
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Pulse wave signal contains a wealth of information about human physiology andpathology. Pulse detection and feature extraction can present health status of the humanand provide a possibility for the modern TCM pulse identification and classification. Thisis also the purpose of this article. Based on the pulse wave signal acquisition, signalfeature extraction and pulse recognition were
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