Learn More
Spatial time–frequency distributions (STFDs) have been recently introduced as the natural means to deal with source signals that are localizable in the time–frequency domain. Previous work in the area has not provided the eigenanalysis of STFD matrices, which is key to understanding their role in solving direction finding and blind source separation(More)
Anti-noise ability and edge continuity of Sobel edge detection algorithm are poor. In order to solve these problems, an improved method of Sobel operator is given in this paper. In addition, making use of fusion technology, a kind of method combined with improved Sobel operator, wavelet transform, Canny algorithm and Prewitt operator is put forward, which(More)
Breast cancer is the most common malignancy in females. The presence of cancer stem cells (CSCs) is the main cause of local and distant tumour recurrence and is associated with poor outcome in breast cancer. However, the molecular mechanisms underlying the maintenance of CSCs remain largely unknown. This study demonstrates that prostate tumour(More)
In this paper, a framework for the automatic pronunciation scoring is presented. The system included three modules which are pronunciation parameter database , evaluation model based on artificial neural network and automatic scoring module .The Mandarin Proficiency Test to be completed by computer-aided evaluation, not only can remove the human factor to(More)
This study analyzed the effects of ecological factors on secondary metabolites of Scutellaria baicalensis using two sources: 92 individual roots of S. baicalensis from all over China, and secondary metabolites, medicinal materials and inorganic element contents obtained from the testing of 92 S. baicalensis rhizosphere soil samples. The study used(More)
Trace element levels are associated with the incidence of osteoporotic fractures, but related mechanisms remain unknown. Trace elements may interfere with growth, development and maintenance of bones. Therefore, we investigated whether plasma trace element levels are associated with bone mineral density in elderly males in Beijing. After epidemiologically(More)
Application of 3D remote sensing technology brings new research methods to railway engineering geological investigation and surveying. This paper discusses the method on railway engineering geology location based on 3D rs technology. The whole job is divided into three parts: image processing and professional interpretation,result output (for field(More)
ETHNOPHARMACOLOGICAL RELEVANCE Dendrobium. chrysotoxum Lindl is a commonly used species of medicinal Dendrobium which belongs to the family of Orchidaceae, locally known as "Shihu" or "Huangcao". D. chrysotoxum Lindl is widely known for medicinal values in traditional Chinese medicine as it possesses anti-inflammatory, anti-hyperglycemic induction,(More)