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Needle insertion is critical in many clinical medicine procedures, such as biopsy, brachytherapy, and injection therapy. A platform with two degrees of freedom was set up to study the effect of vibration frequency on needle insertion force. The gel phantom deformation at the needle cutting edge and the Voigt model are utilized to develop a dynamic model to explain the relationship between the insertion...
The design of adaptive test paper composition algorithm based on the item response theory is proposed and the ultimate goal of adaptive test is to measure the candidates' potential accurately. According to the item response theory, candidates' testing behavior is the reflection of their potential language ability and a potential of a candidate can be estimated directly by his/her item response together...
There is an improved algorithm of the matching of prefix and suffix BM strings is proposed. The algorithm becomes more efficient by combining the prefix and the location information of the next character of the current window, trying more location movements with the existing information. Experiments show that this algorithm is better than BM algorithm. Furthermore, an algorithm of subjective items...
Wavelet technology is applied to direct the traffic of Olympic Games to locate and identify various vehicles. License plate recognition algorithm is always on the basis of Fourier transform theory. However, when expressing signal through Fourier, all frequencies it contains can be determined but when they appear cannot be determined. Apply wavelet transform theory to the whole process of license plate...
For the traditional expert system problems, combined with service-oriented architecture (SOA) and soft-bus idea, proposed a expert system design under a new architecture. And taking the medical expert system for example, clarify the advantages of the design, which has great significance for achieving the integration of expert system, interface standardization and system scalability.
To efficiently exploit the broadcast feature of wireless channels, a opportunistic routing protocol based on random linear network coding is proposed for wireless sensor networks. The protocol requires each node except for destination in network to transmit the random linear combination created by all packets in buffer, and confirms the expected number of transmissions according to node's credit value...
This dissertation also used BP network to recognize the characters of the vehicle plates. However, BP network has inherent defects and, by improving it with network learning method, this dissertation proved the possibility of an increased network learning efficiency, effectively solving the low-speed and local minimum problems of the neural network constringency. Furthermore, it introduced the variable...
In current license plate recognition, there are many problems because of the complex, irregular motion and blur license plate. This paper presents a license tilt detection method, and to improve overall system performance and reliability, proposes some detection algorithms: gravity center method, Hough transform, the method of put vertexes into a line. Simply described their processes, at the same...
Most methods of the tradition character reorganization are based on JPEG and the classifier and then matching with the templates. Due to the environmental of plate with large noise plate and interference factors, the accuracy of this method is relatively low. In this paper, based on the analysis of the traditional method of the character recognition, it uses wavelet processing for image pre-processing,...
This paper discuses the application of wavelet analysis and invariant movements on automatic vehicle recognition. The wavelet analysis was used to get multi-scale edge images, and the invariant moments were used to anti-tilt and anti-interference, and to correct the vehicles of the images. Then we can compare similarity through the Euclidean distance between two images' normalized moment vectors....
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