A study shows that people have more gum diseases today than they did 2，000 years ago. The study， from London’s King’s Co......

本研究借助计算机技术，初步探讨鼠类头骨自动分科的识别模型。研究选择4个科的8种鼠的成年组作为研究对象，用BugshapeV1.0提取数学形......

观察了24例实验恒河猴(Macaca mulatta)完整头骨的近100项非测量性状.结果表明,颅形以楔形为主(41.67%),其次为盾形(29.17%);眶形......