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Fatigue driving easily causes traffic accidents. drowsiness is an important hint of Fatigue. A novel drowsiness detection algorithms based on eyelid movement is proposed in the paper. The cascaded classifiers algorithm is used to detect driver's face and the diamond searching algorithm used to trace the face. A simple feature is then extracted from temporal difference image and used to analyze rules...
The selection for the number of hidden nodes for a neural network is of critical importance. This paper proposes a novel algorithm to determine the number of hidden nodes of a neural network and optimize it. In the method, the number of hidden nodes H is first computed by empirical formulas, and the range of H is determined according to computed result. Then, the "three points search" is...
Vegetation reflectance spectra in field with spectrometer to be tested in this study, used eight kinds of spectral parameters to analysis spectral of vegetation, six kinds of heavy metal content in plant leaves to be measured, then the regression model from the spectral characteristic parameters to the heavy metal content can be built, according to this can inverse heavy metal content with spectral...
A novel face recognition method is proposed in this paper to alleviate the "Small Sample Size" problem of the conventional Linear Discriminant Analysis (LDA). This method is based on the feature extraction of global odd and even face image representation, and a dimension reduction process via Symmetrical 2D Partial Least Square Analysis (2DPLS) by two sizes. The low-dimensional features...
Cognitive Diagnosis is more and more important for education and has been a research focus. Tatsuoka's Q-matrix theory has been widely used in Cognitive Diagnosis, in which Reduced Q-matrix (Qr matrix) plays an important role. Two methods generate Qr matrix are considered. One is Tatsuoka's method, another is augment algorithm. Based on augment algorithm, a stepwise augment algorithm is proposed....
The steam generation mechanism is the key technology of the domestic steam cleaner. Not only the weight and price of a steam cleaner but also the performance of a steam generation mechanism must be considered to improve the competitive power of the products. In this study, a new steam generator which using a cartridge heater was recommended for compensating the drawback of the spray boiling steam...
Network scalability and energy efficiency in wireless sensor networks should be supported by elaborate topology control. Clustering algorithms are useful topology management approach to reduce communication overhead and exploit data aggregation in wireless sensor networks. A clustering algorithm based on cell combination is presented in the paper for the networks where sensor nodes are distributed...
Behavior evaluation is an important research topic in trustworthy network. Up to now, most effect focuses on the validity of host's and user's identity, such as integrity measurement and access control, which could not guarantee the trustworthiness of valid user's behavior. In this paper, we proposed an unsupervised method for evaluating user's network behavior and trustworthiness grades in a local...
After represent the deformation as a field of discrete displacements, nonrigid image registration problem can be considered as a maximum a posteriori inference problem in Markov random field, which can be optimized using pairwise Gibbs energy minimization technique. To find a minimum, we model the registration problem as a game among pixels, propose a novel approach for nonrigid image registration...
Character segmentation and recognition is the research hotspot of vehicle license plate recognition technology. A new method is presented in this paper. Based on the vehicle license location, the segment method of vertical projection information with prior knowledge is used to slit characters, and extract the statistical features. Then the RBF neural network is used to recognize characters with the...
Character segmentation and recognition are important steps in the automatic license plate recognition (ALPR) system. The skew license plate has a great influence on the accurate character segmentation and recognition. To solve the problem, an efficient approach for skew correction of license plate is proposed. First, the plate image is divided into a set of 5??5 non-overlapping blocks. The local orientation...
In this paper, we introduced an automated essay scoring system for CET4 (College English Test band 4, national English level test in the People's Republic of China). We give score on several components including some surface features, grammar checking, sentences and whether the essay is off-topic. For the surface feature, we used the number of words, number of sentence, average word length, average...
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 article mentioned an integral projection algorithm basing on narrowing region, and this algorithm can focus face characters from video picture sequence, so it supplies precision guarantee for face pose estimate. This article realized face pose estimate based on face ellipse circle and feature points. The basic thought is that establish the mapping relationship between position parameters and...
Based on characteristics of ultrasound CT images and principles of segmentation, the largest gray value of pixels in flaw areas is taken as seed points in order to meet the pixel proximity for the criterion of region growing. Through changing segmentation direction, a new segmentation method can be obtained. The experiment verified that the method has achieved above 95% to integrity and accuracy of...
Key agreement protocols are essential for secure communications in open and distributed environment. The study of tripartite key agreement has great theoretical and practical significance. Shim and Woo pointed out that the four tripartite authenticated key agreement protocols proposed by Al-Riyami and Paterson were insecure. Modifying the communication messages, an active adversary is able to calculate...
1H NMR spectroscopy was utilized to distinguish the brands of rapeseed oils. As there are more than four hundreds of NMR variables, uninformative variables should be eliminated to improve model's discrimination ability and save the calculation time. A hybrid variable selection which is combined with uninformation variable elimination (UVE) and successive projections algorithm (SPA), was used to achieve...
The emphases of this study are Web log data preprocessing and collaborative filtering. Aiming at user session identification in the process of data preprocessing and analyzing existing algorithms, this paper established a Web log data preprocessing algorithm based on collaborative filtering. Detailed steps of algorithm and an experimental simulation were carried out. The results of the experiment...
Blind signature allows the user to obtain a signature of a message in a way that the signer learns neither the message nor the resulting signature. At present, many electronic voting systems(E-voting) based on the blind signature scheme have been proposed. In this paper, we introduce a novel identity-based blind signature scheme. This signature scheme is constructed in the standard model and achieves...
Thermoforming is one of the most versatile and economical processes available for shaping polymer products. To improve the competitive power of the products, the manufacturing fee should be continuously reduced. But, the required heat can not be freely reduced because of the temperature difference between surface and center of the sheets. In this paper, an optimal design using NURBS and RSM was carried...
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