Learn More
Rice restorer lines play an important role in three-line hybrid rice production. Previous research based on molecular tagging has suggested that the restorer lines used widely today have narrow genetic backgrounds. However, patterns of genetic variation at a genome-wide scale in these restorer lines remain largely unknown. The present study performed(More)
The concept of memory is due to the fact that the magnetization level of permanent magnets (PMs) in the motor can be easily regulated by a temporary dc current pulse and then be memorized automatically. By incorporating this concept into the hybrid-field doubly salient PM (DSPM) motor, the resulting dc-excited memory motor can offer effective and efficient(More)
A hybrid filtering approach is proposed for satellite attitude determination, which may furnish an optimal estimate of the state vector in the case where the measuring systems are composed of dissimilar types of multi-sensors with different sampling frequencies. Obviously, the no uniform sampling may be regarded as its special case. Then, a six-dimensional(More)
For the blindness in initialization of particle swarm optimization algorithm and the phenomenon of premature occurred in the course of evolution, a new algorithm is proposed in this paper: blind detection algorithm based on adaptive chaotic particle swarm optimization. The performance simulation shows that, using of randomness and ergodicity of chaos, the(More)
Transductive graph-based semisupervised learning methods usually build an undirected graph utilizing both labeled and unlabeled samples as vertices. Those methods propagate label information of labeled samples to neighbors through their edges in order to get the predicted labels of unlabeled samples. Most popular semi-supervised learning approaches are(More)
At present, many of China's rural farmland irrigation systems have some shortcoming. In this paper, the traditional control method of irrigation has been made some improvements. The traditional irrigation meter controller carries on the sampling to the outlet pressure of main pipe in the pipe network and adopts the traditional PID to control water pressure.(More)
By redefining multiplier associated with inequality constraint as a positive definite function of the originally-defined multiplier, u<sup>2</sup> <sub>j</sub> ,i = 1,2, ----, m, say, the nonnegative constraints imposed on inequality constraints in Karush-Kuhn-Tucker necessary conditions are removed completely. Hence it is no longer necessary to convert(More)
The classification boundary for multi-classes imbalanced dataset is difficult to judge, posing an important challenge on classification methods. Aiming at this problem, we propose an multi-classes imbalanced data classification algorithm based on sample information. The proposed algorithm applies the sample information measurement to multi-classes(More)
The segmentation of skin color region is carried on through the mathematics morphology processing, using Hough transform to locate the eyes, and then the expression image is proceeded by geometry standardization. After using wavelet transform to reduce the dimension of images, the feature extraction of facial expression can be realized with the(More)