样本矩

Image Recognition;Small Sample;Invariant Moment;Neural Network;Support Vector Machine

图像识别；小样本；不变矩；神经网络；支持向量机

And then, adopting the same model, cyclic moment estimation statistic of different orders are constructed respectively, large sample variance expressions of the estimator through theoretic analysis are derived, as well as the constraint relation of estimator performance and noise statistical characteristic. The curve of estimation performance is obtained through Monte Carlo simulation test, which proves the related conclusion derived.

然后，论文同样以加性和乘性噪声联合干扰下的复谐波信号和复线性调频信号为观测模型，分别构造了基于不同阶次的循环矩估计量，从理论上推导出了估计量的大样本方差表达式，分析了估计量性能与噪声统计特性的约束关系，通过Monte-Carlo仿真试验得到了估计性能的曲线，验证了推导的有关结论。

The strong convergene and convergence rate of the estimators are obtained.

对于乘性和加性噪声中的谐波信号，建立了一、二、三阶循环矩样本估计的统计性质。

Thus, the purpose of this study explored the peak torque of six elite college female golf players (average ages=21.8) of the wrist joint of the dominated and undominated in 60°/s, 120°/s and 180°/s three different angular velocities and shoulder and elbow joints in 60°/s, 180°/s and 300°/s three different angular velocities. SPSS 10.0 for Windows, Paired-Samples t test analysis of the isokinetic strength of college golf players' dominated or undominated hand.

因此本研究目的为探讨国内6名优秀大专女子高尔夫选手（平均年龄21.8岁）其惯用手和非惯用手之腕关节在60°/s、120°/s和180°/s三个不同角速度下和肘关节、肩关节在60°/s、180°/s和300°/s三个不同角速度下所分别产生的峰值转矩值，且以SPSS 10.0软体，进行成对样本t考验(α=。05)检验优秀大专女子高尔夫选手惯用手及非惯用手之等速肌力差异，藉此来了解两者角色的重要性。

After the vein pattern was segmented from the vein image by an improved NiBlack method,authors obtained the vein pattern skeleton by an improved conditional thinning algorithm.On the basis,the algorithm extracted seven modified moment invariants of the vein pattern skeleton as the input vector of SVM for the recognition of vein pattern.The experiments on a database including 500 samples has achieved a recognition rate of 95.5%,and it indicates the algorithm is effective.

算法在采用修正的NiBlack算法从原始图中分割出静脉纹路，然后采用改进的条件细化算法进行细化获得静脉骨架的基础上，提取静脉骨架的7个修正的几何不变矩作为支持向量机分类器的输入进行静脉分类识别，在有500个样本的数据库上进行实验，获得了95.5%的识别率，表明了算法的有效性。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。