中文摘要：

在这个工作，一个电子鼻子被用来评估不同栽培变种和甜瓜的成熟阶段，以便建立一个科学方法精确地区分甜瓜的成熟和变化。主要部件分析(PCA ) 和线性判别式分析(LDA ) 证明不成熟的甜瓜能很好用电子鼻子与成熟甜瓜被区分开来。VVhen PCA 方法习惯于分析，电子鼻子能完全分类并且识别甜瓜的成熟。同时，电子鼻子能与高辨别价值区分甜瓜的不同变化。在切割或没有切割条件下面的样品的风味将稍微变化，导致在不同变化之中的辨别价值的变化。有在没有切割条件下面的类似的风味的样品能通过切模式被分析。研究造了一个快速、精确的方法判定甜瓜的成熟而不是人感觉。

英文摘要：

In this work,an electronic nose was used to evaluate the different cultivars and mature stages of melons,so as to establish a scientific method to accurately distinguish the maturity and varieties of melons. Principal component analysis （PCA） and linear discriminant analysis （LDA ） showed that immature melons could be well distinguished from mature melons using electronic nose. When PCA method was used to analyze,electronic nose could completely classify and identify the maturity of melons. Meanwhile,the electronic nose could distinguish different varieties of melons with high discrimination value. The flavor of samples under cut or no cut conditions would slightly change,leading to the variation of discrimination value among different varieties. The samples with similar flavor under no cut condition could be analyzed through cutting mode. The research built a rapid and accurate method to judge the maturity of melons instead of man sense.