不相关系数

The common method, that all strong-correlation terms of the model are eliminated, can bring the loss in the engineering application, so the new method is proposed that the identified model reserves some correlation. The augmented matrix A is constructed by the outputΔW and the matrix S. The"determinating order based on ratio of determinant"is brought out to screen the strong-correlation terms in the structure identification. The latent root estimation is improved in screening the eigenvalues and eigenvectors. Thus the estimation precision is improved greatly.The consistence check of guidance instrument error coefficients of flight test and ground test is the purpose of flight experiment. The causes of inconsistency of the two models are analyzed. The hypothesis test of linear regression model based on F statistics is proposed to check the consistence.Finally, the instability of error coefficients is probably caused by the change of the flight environments, therefore, the relation between the error coefficients and flight environment is analyzed. The approach is presented to identify SINS guidance instrument error models and compensate the error in the segmented sections corresponding to the change of vertical acceleration of aircraft.

在结构辨识中，常用的方法由于将模型中的强相关项全部剔除而给工程应用带来损失，因此，本文提出了新的有益思想，即在保留一定相关性的基础上进行辨识：将输出向量ΔW与环境函数矩阵S构成增广矩阵A，然后采用"比定阶行列式"来剔除相关向量的方法，这样既可以尽可能多地保留了对落点影响大的强相关参数，又可以对落点影响小的强相关参数给予剔除；在参数估计中，改进了特征根估计中特征根和特征向量的筛选方法，提出"近零"准则，从而大大提高了参数估计的精度；再者，鉴于天地模型"一致性"检验是飞行试验和SINS制导工具误差系数分离的主要目的，因此，本文又深入分析了造成天地模型不一致的原因，提出了采用基于F统计的线性回归模型假设检验方法来进行捷联制导工具误差模型的天地"一致性"检验；最后，鉴于飞行环境剧烈变化可能会对惯性仪表误差系数稳定性带来一定的影响，因此本文深入地分析了SINS制导工具误差系数与外界环境的关系，提出了基于过载变化大小的分段辨识和分段实时补偿的算法。

The result showed that the single correlation between the characters of weight and heart girth, chest width and circumference of cannon bone was significantly different. The correlation between weight and heart girth, chest width, circumference of cannon bone was highly positive correlation. Among seven regression models, the correlation index of six regression models was over 0.7, but that of 60 days was 0.452. The result suggested that selecting body weight was efficient through heart girth, body high, chest width and circumference of cannon bone.

对不同日龄各项体尺与体重建立的了回归方程，结果表明，60日龄回归模型的决定系数R~2=0.452，其它6个回归模型的相关指数均在0.7以上，其中方程1、5、6、7的相关指数都在0.9以上，表明这些回归方程中各项体尺指标与体重之间相关密切，根据胸围、管围、体高和胸宽对体重的选择都是有效的，具有一定的参考作用。

Some basic properties of σ- LFSR over F4 are studied, such as nonlinearity, cycle structure distribution of state graph, the largest period and counting problem related. The conclusions are as follows:The coefficient ring of σ-LFSR is isomorphic to the matrix ring over F,. The cycle structure of σ- LFSR is consistent with that of the determinant of the corresponding polynomial matrix if and only if the feedback polynomial of - LFSR does not contain nontrivial factor over F2,. The counting formula of the number of σ- LFSR with inconsistent cycle structure is also showed in that part. The period of σ-LFSR with degree n is maximum if and only if the determinant of the corresponding polynomial matrix is the primitive polynomial with order 2n over F2,.

本文研究了有限域F_4上的σ-LFSR的一些基本性质，如非奇异性、状态图的圈结构的分布、最大圈的充要条件及相关的计数问题等，得到以下结论：σ-LFSR的系数环同构于F_2上的矩阵环；σ-LFSR的状态图的圈结构与对应的多项式矩阵的行列式的圈结构一致的充要条件为σ-LFSR的反馈多项式不含有非平凡的F_2上的因式，给出了圈结构不一致的σ-LFSR的计数公式； n次σ-LFSR周期达到最大，当且仅当对应多项式矩阵的行列式为F_2上的2n次本原多项式。

The results were summarized as follows:(1) the 4-week interval retest reliability for the Decidedness, Comfort, and Reasons scales were .69,.80, and .89, respectively, and for the subscales of the Reasons scale ranged between .78 and .85;(2) the alpha coefficients for the three scales were .85,.91,.97, and for the subscales of the Reasons scale ranged between .78 and .93;(3) there was a positive correlation between the Decidedness scale and the Comfort scale, and both scales were negatively correlated with the Reasons scale;(4) career indecision was found to be correlated as expected with state-trait anxiety, career beliefs, and perceived career barriers;(5) there were no significant differences between social science group and natural science group;(6) the only significant gender difference was found on the Career Choice Importance scale of the Reasons scale; and (7) there were significant grade differences on all the CCFI scale scores, with higher school grade level students showing greater decidedness.

本量表共分三部分：定向量表，安适量表及原因量表。其中，原因量表尚包含「环境资讯」、「抉择时机」、「双趋冲突」、「焦虑犹豫」、「科系因素」、「外在阻力」及「自我认识」七个分量表。做答方式采六点计分，从「非常不符合」到「非常符合」。信度方面，间隔四周的再测信度，定向量表为。69，安适量表为。80，原因量表为。89（分量表介於。78至。85间）。Cronbach alpha系数，定向量表为。85，安适量表为。91，原因量表为。97（分量表介於。78至。93间）。在效度方面，定向量表与安适量表呈显著正相关(r=。67)；两量表与原因量表呈显著负相关(r=-。77及-。75)；原因量表各分量表的内部相关低於各分量表与总分的相关。大学生的生涯定向程度、对生涯定向状态的安适程度及生涯未定向原因的类型三者与特质焦虑、情境焦虑、生涯信念及职业抉择阻力有关。

In every period, do the following operations:# For each 8*8 block, do the discrete cosine transform, then take out direct current coefficient in each block, using the transformation above for each DC coefficient, the gold stands for the code of the spread-spectrum we use when embedding the different watermark bit in different frames, after all of the watermark information which we want to embed is embedded, then do the inverse discrete cosine transformation, and store the current frame in a new file.

于是利用DCT变换域的这点重要的几何不变性，我们可以推导出一种能够抵抗几何攻击的视频水印算法，即将所需要嵌入的水印信息以127位扩频序列作为辅助，以求和值形式嵌入到DCT变换后的每个宏块的每个DC系数当中，具体嵌入和提取算法如下：根据使用的扩频序列的长度N，基于相关的嵌入器需要选取包含N帧的视频子序列，令这N帧视频子序列作为一个嵌入周期，对于每N帧视频子序列做如下的操作，#即对于每个8×8的像素块进行DCT变换，然后取出每个DCT变换后的直流分量，对于每个DC系数，做如上所述的变换，其中gold为在第k帧中嵌入第i位水印信息时使用的扩频码字值，待将所有需要嵌入的水印信息全部嵌入后，再做反DCT变换，保存当前帧。

The CVD is an important index to indicate tree diameterdifferentiating.On basis of dynamic change and tendency of CVDamong trees in stand,three models of square CVD are proposed.i.e.,basic model,stand factor model,and thinning effects model.All threemodels are of mechanism,asymptotic characteristic,and invariance forprojection length.Futhermore,there are compatiability and extremevalues in thinning effects model for thinned and unthinned stands.

直径变动系数是描述林木直径分化的重要指标，根据林木直径变动系数的动态变化和趋势，本文提出了直径变动系数平方动态变化的三个模型：基本模型，与林分因子相关的模型，考虑间伐效应的模型，上述三个模型均具有一定的机理性、渐近性和步长不变性，特别是考虑间伐效应的模型为间伐林分和未间伐林分的相容性模型，它还具有相容性和极值性。

It is difficult to determine which of the five prevailing rheologic models is best correlated with the drilling fluids described by methods of tabulation, plotting and correlation coefficient.

在5种流行的钻井液流变模式中，哪种流变模式与所描述的钻井液相关性最好，是运用通常的作田法、列表法和相关系数法都不能很好解决的问题。

The standard deviation of factor, regerssion equation and correlation coefficient between estimated and actual leaf area all demonstrated the adequency of the model The leaf length and width were used to calculate total leaf area per plant for Phalaenopsis white hybrid grown in phytotron at various day/night temperature After 9-month experiment, plants grown at 30/25℃ increased 1.4 and 3.8 times total leaf area compared with plants grown at 25/20℃ and 20/15℃, respectively.

由於检定有共同斜率之存在，故不计大小可求得共同估值的0.825，并由常数之变异范围、叶面积估值与实际叶面积之廻归方程式及相关系数确知其适用性，以叶面积估算决比较不同温度对白花蝴蝶兰生长之影响，则不论叶幅、叶面积增加量、长叶率均以日／夜温30／25℃增加量最大，其叶面积增加量为25/20℃之1.4倍，20/15℃之3.8倍。

The following chart shows the correlation coefficients for a lead time in oil prices from zero to fifteen quarters.

首先研究的是油价变化超前于经济增长不同时长（从0到15个季度）之下的相关系数。

The higher surface energy of substrate results in higher effective viscosity and thicker ordered molecular film.

从侧面证明了有序液体模型的正确性，即薄膜润滑的成膜性能与近固体表面润滑剂分子的有序度密切相关；足够大的外电压使无序流体膜有序化，生成较高的有效粘度和较厚的油膜，并且二者随着外电压的增加，逐渐趋于稳定；外电场作用下，摩擦系数增大，切断电源后，摩擦系数减小，但不能恢复到未加电压前的摩擦系数值。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。