权证定价的理论模型及实证分析

给出了4种权证定价模型,并将其应用于中国证券市场上两种权证的定价中.通过对图表的分析,发现了模型间模拟精度的大小,找到了理论价格与市场价格偏差的部分来源.     

线型聚能装药射流形成及侵彻钢板的数值模拟

利用LS-DYNA对线型聚能装药射流的形成和侵彻钢板的过程进行了数值模拟,通过其结果与现有实验结果进行对比表明LS-DYNA程序可用于线型聚能装药的优化设计。     

Anthropomorphic Classification of Tactile Qualities of Woven Fabrics Based on Skin/Textile Friction-Induced Vibrations

The common method classifying tactile qualities of fabrics is indirectly based on their difference of purely mechanical and physical properties. When human skin slides across fabric surfaces, the friction interaction between fabrics and skin will occur and trigger the cutaneouS tactile receptors, which are responsible for perceived tactile sensation. By the extracted features from friction- induced vibration signals, this paper presents an anthropomorphic classification method classifying tactile qualities of fabrics. The friction-induced vibration signals are recorded by a three-axis accelerator sensor, and the entice testing procedure is conducted in an anthropomorphic way to obtain vibration signals. The fast Fourier transform （FFT） is applied to analyzing the recoded signals, and then the classification features are extracted from the FFT data by the neurophysiological properties of tactile receptors. The extracted features are used to classify fabric samples by the softness sensation and the roughness sensation, respectively, and the classification performance is checked by a comparison with those in a sensory evaluation procedure. The results showed that the anthropomorphic objective classification method was precise and efficient to clarify tactile qualities of woven fabrics.