sample characteristic

The improved PCA is used to reduce the dimension first to get the optimal characteristic subspace of the original sample data set. In this process, the intra-class scatter matrix of the characteristic subspace should be ensured to be non-singular.

首先，用改进PCA算法对原样本降维，获得最优特征表示子空间；然后，在保证该子空间类内散度矩阵非奇异的基础上，作改进的线性判别分析。

Based on the craft characteristic of CCDP and the technics of expert system and soft-sensing, two kinds of flow controls are proposed which named as sample control and stabilize control of first-tack. The flow hybrid control model of the first-tack is designed in this paper.

基于连续碳酸化分解过程工艺特点，结合专家系统方法和软测量技术，提出了首槽进料量的报样控制和稳定控制，设计了首槽进料量混合控制模型；

Meanwhile, temperature characteristic and velocity of oxygen consumption are also studied by full-scale experiment. Using conversation of energy and estimation of chemical bond energy to obtain heat release of coal sample, the limit parameters of self-ignite of coal sample are made sure.

通过大煤样自然发火实验研究了煤样的升温速度特性、耗氧速度特性，采用能量守恒和化学键能估算法计算了煤样的放热强度，确定了煤样的自燃极限参数。

The local concept semantics vector from NMF has stronger clssification capacity than that of global concept semantics, because the fromer can correspond directly with the sample characteristic, which manifests each classified text respective characteristic.

由于NMF生成的局部概念语义向量能和样本的特征直接对应，体现了各个分类中文本各自的特点，因此比体现所有文本共同特征的全局概念语义向量具有更强的区分能力。

The AC resistively of sample meets the technical requirements of high characteristic liquid crystal light valve.

样品的交流电阻率满足高性能液晶光阀光电导层的要求。

RESULTS: The reference X ray diffraction Fourier fingerprint pattern and characteristic diffraction peaks of Cornu Cervi Pantotrichum were obtained by three samples of Cornu Cervi Pantotrichum and one sample of Cornu Cervi Pantotrichum.

结果：通过应用粉末X射线衍射Fourier指纹图谱鉴定法对3个马鹿茸和1个花鹿茸中药材进行分析鉴定，获得了马鹿茸的对照X射线衍射Fourier指纹图谱及特征标记峰值。