相关性

In order to improve the validity of identifi cation of digital image origin and predetermine accurately threshold of identification,a new probability density function of generalized chi square distribution is constructed within0,1 for asymmetrical distribution of noise correlation.

为了提高鉴别数字图像来源的正确性，正确设置判别阈值，针对噪声相关性的非对称分布，在0，1区间构造了一个广义chi平方分布的新函数，并提出了一种利用广义chi平方分布来描述噪声相关性的非对称分布和利用广义高斯分布来描述噪声相关性的对称分布的新方法。

1、Neural network correlated with LIFG and RIFG exists in normal subjects in resting-state,which might be the neural foundation in retaining the normal language function;2、The left fusiform gyrus,bilateral medial frontal gyrus and right anterior cingulum in aphasia patients after stroke showed low degree correlation,that might be one of the mechanisms of aphasia;3、The brain regions showed positive correlation with RIFG in aphasia patients only exist in right hemisphere in resting-state as well as which exist in bilateral hemisphere in normal subjects,suggested that RIFG is out of correlation with the left hemisphere in aphasia patients;4、The left thalamus showed positive correlation with RIFG only in normal subjects, inferred that the left thalamus might be an important mesomerism structure in the correlation of bilateral hemisphere;5、Left insula showed stronger positive correlation with RIFG in normal subjects than that in aphasia patients,suggested that dominant hemisphere insula is important in retaining in normal language function.

1、正常人在静息状态下即存在与LIFG和RIFG具有相关性的神经网络，该网络可能是维持正常语言功能的神经基础；2、脑梗死后运动性失语患者左侧梭状回、双侧额叶内侧回、右侧前扣带与LIFG的连接程度的减低可能是运动性失语的发生机制之一；3、与RIFG正相关的脑区在对照组为双侧半球分布，而在患者组仅出现在右侧半球，说明患者组RIFG与左侧半球的连接中断；4、RIFG与左侧丘脑的正相关性仅出现在正常对照组中，推测左侧丘脑可能是联系两侧半球功能区的重要中介结构；5、对照组与RIFG正相关性明显高于患者组的脑区位于左侧岛叶，说明优势半球岛叶对维持正常语言功能具有重要作用；第二部分脑梗死运动性失语患者语言恢复机制的静息态fMRI初步探讨目的：运用fMRI技术，采用种子点方法在静息状态下分析脑梗死运动性失语患者不同的恢复阶段语言功能连接方式。

On the base of Pearson correlation coefficient indicate that the connection between IBI and CQHEI is higher than IBI and ISC of Juoshuei river basin. To the section of the upper and middle reaches, we suggest choosing simple and convenient SIAM to be the standard for environment in the future. But due to the type of ecosystem has a tendency to estuary ecosystem at the lower reach of Juoshuei river basin, SIAM is more unsuitable for evaluating at the reach. The correlation between each index is not notable, so we suggest seeking other assessment method as comparative environmental standards.

由指标相关性讨论可知栖地品质与生物完整性相关性较高(r=0.649)，水质状态与生物完整性相关性则较低(r=0.267)，对於中上游河段部分，建议日后进行河川生态环境调查时可选择简便易用的SIAM模式做为标准；下游近海河段则因河川型态渐转变为河口生态系的型态，故适用於溪流生态系的SIAM在适用性上较差，各指标间相关性并不显著，建议可寻求其他评估模式做为环境品质的判断标准。

Major results were summarized as follows:(1) A total of 58 tree species from 53 genera in 36 families among which 8 species were Rosaceae, 5 species were Liliaceae, 5 species were Eriaceae, 3 species were Ranunculaceae, 3 species were Compositae, 2 species were Cupressaceae, 2 species were Caprifoliaceae, 2 species were Umblliferae, and other 28 tree species were only one receptively. These were recorded in the 8 plots of the A. georgei var. smithii forest;(2) Number of families, genera, species and Margalef index correlated negatively with altitude (P.05), with a peak at 3600 m.(3) Shannon-Wiener index correlated negatively with altitude (P.01), and maintained stable at the altitudes between 3700~4100 m, evenness with altitudes, however, this trend was insignificant.(4) Jaccard index increased sharply with increasing altitude at the altitudes between 3600~4100 m, and was lower between different vegetation types at the altitudes between 4100~4200. Cody index β(subscript c decreased with an increasing altitude, but there were 2 troughs between 4000~4100 m and 4200~4300 m.(5) Maximum tree height H(subscript max and HH(subscript max=37 mcorrelated negatively with altitude (P.05); but basal area and BA BA(subscript max=5.3m^2 correlated with altitudes, however, this trend was insignificant.

结果表明：(1)在调查的8个急尖长苞冷杉林样地内共有植物58种，分属于36科53属，其中植物较多的科有蔷薇科8种、百合科5种、杜鹃花科5种、毛茛科3种、菊科3种、柏科2种、忍冬科2种、伞形科2种，其余的28科各只有1个种；(2)物种科、属、种数、Margalef指数D(下标 M与海拔存在显著的负相关性(P.05)，在分布急尖长苞冷杉最低海拔3600m处出现物种丰富度的最大值；(3)多样性指数与海拔之间有极显著的负相关性(P.01)，并且在3700~4100m之间多样性指数保持稳定；均匀度指数与海拔梯度之间存在负相关性，但不显著；(4)Jaccard指数C(下标 j在海拔3600~4100m随海拔的升高而升高，在生境过渡带的4100~4200m之间Jaccard指数C(下标 j较低；Cody指数β(下标 c随海拔的升高呈下降的趋势，但在4000~4100m和4200~4300m 海拔区间出现2个低谷；(5)最大树高H(下标 max和最大胸径DBH(下标 max与海拔之间存在显著负相关性(P.05)；胸高断面积之和和立木密度与海拔之间存在负相关性，但不显著。

The dissipation factor tip-up D tan d , the change of capacitance D C / C 0, the maximum discharge q max and the mean discharge magnitude q mean , A compared investigation of the correlations between V min , V av and service time were compared with those between D tan d , D C / C 0, q max, q mean and respectively.

对大量的不同运行年数的线棒进行了超声波 V min 和 V av 测量，以及介质损耗角增量 D tan d 、电容变化率 D C / C 0、最大放电量 q max 和平均放电量 q mean 等电气测量试验，对比研究了超声参数( V min 和 V av )和电气测量参数( D tan d 、 D C / C 0、 q max 和 q mean )与运行年数的相关性，发现， V min 和 V av 与的相关性很强，相关系数 R 分别为0.892和0.890，而 D tan d 、 q max 和 q mean 与的相关性较弱， R 在0.55~0.60范围内， D C / C 0与几乎没有相关性， R 仅为0.310；采用线性回归分析，分别建立了 V min 和 V av 与的二阶和三阶线性函数的数学模型， R-S 分别为0.828和0.903，并分别提出了最可靠运行年数和置信度为95％的可靠运行年数的预测方法。

Theurinary IL-6 level positively correlated with density of glomerular matrix membrane, global sclerosis, fiber or fibrocellular crescents and interstitial fibrosis (p. 05). According to the degree of density of glomerular matrix membrane and interstitial fibrosis, urinary Col-IV level had better correlation than urinary TGF-betal and IL-6 levels.In IgAN, Col-IV showed increased expression in diseased renal tissue whereas the site of expression of TGF-betal was mainly localized within the cytoplasm of tubular epithelial cells. Interstial expressionwas also present but glomerular TGF-betal expression was found only in patients with heavy mesangial proliferation. There was a significant correlation between glomerular positivity for Col-IV and severity of histological damage. There was also a significant correlation between positivity for TGF-betal and Col-IV in the tubular epithelial and interstitial lesions. In contrast, there was no ralationship between glomerular positivity for TGF-betal and severity of histological damage.The urinary TGF-betal level paralleled tubular TGF-betal expression.

结果 ①IgAN患者尿TGF-β1、IL-6、Col-Ⅳ水平较健康人明显增高(P＜0.01)，该变化与血中的浓度无关(P＞0.05)；②尿TGF-β1水平与小管间质TGF-β1阳性表达呈正相关(P=0.000)，而与小球TGF-β1阳性表达无关(P＞0.05)，尿Col-Ⅳ水平与小球和小管间质Col-Ⅳ阳性表达均呈良好的相关性(P＜0.01)，还与小管间质TGF-β1阳性表达呈正相关(P＜0.05)：③小球Col-Ⅳ阳性表达与肾组织慢性病变密切相关(P＜0.05)，小管间质Col-Ⅳ和TGF-β1阳性表达均与肾小管间质病变呈良好的相关性(P＜0.01)，而小球TGF-β1阳性表达与肾组织损伤无关(P＞0.05)；④尿TGF-β1、Col-Ⅳ水平与肾小球基质基底膜面密度、小管间质病变呈正相关(P＜0.01)，与小球内细胞数呈负相关(P＜0.05)，该结果与其在组织中的表达一致；尿IL-6水平浙江大学硕士学位论文尿TGF一B一、IL一6和Col一IV在IgA肾病中的应用价值与基质基底膜面密度、球性硬化、纤维或细胞纤维新月体所占肾小球百分数及小管间质病变均有显著的相关性(F.05)；在轻度肾病理损伤时，尿'l'G卜pl、I卜6、Col一IV水平即升高，而尿Col一W在反映细胞外基质积聚和间质纤维化程度上比尿TGF一pl和IL一6有更好的相关性。

Temporal and spatialcorrelation of Soil moisture under vertical direction was affected by some factor such asmeteorology, land use and fertilization measures. All siol moisture in different layers hastemporal and spatial correlation when soil moisture fluctuates of surface layer becausestability, but influence ability of each factor is not the same. For example, meteorologyhas most strong impact on temporal and spatial correlation of soil water content.

在气象条件较稳定的情况下，不同植被覆盖和不同施肥措施下各土层含水量之间都具有较强的时空相关性，随着气象条件波动加剧，各土层土壤含水量的时间相关性和空间相关性都降低；植被因素相对气象条件对各土层含水量的时间自相关性影响较小，而对各土层土壤含水量之间的空间相关性影响较大，裸地和农田各土层土壤含水量之间的空间相关性相对林地和草地较弱；不同的施肥水平都削弱了土壤各土层含水量的时空相关性。

The results show that 42.86% topsoil samples are polluted by Cadmium, soil synthesis pollution index is moderate, Cadmium pollution degree of topsoil correlate with the environment of sampling sites. The results also show that exchangeable Cd, carbonate-bound Cd, organic-bound Cd and residual Cd are found in all soil samples except for Fe-Mn oxide-bound Cd. Furthermore, the concentration of exchangeable Cd and carbonate-bound Cd, both which have high biological validity, is high. Humus has a certain correlation with exchangeable Cd, organic-bound Cd and residual Cd, and has no obvious correlation with other chemical speciations. Any chemical speciation of Cd has no obvious correlation with pH and total Fe of soil samples. Cadmium in topsoil can be eluviated by acid solution, the quantity of Cadmium eluviated by redistilled water is little. With the rise of pH of eluviating solution, eluviated Cadmium quantity decrease. For the same soil sample, the lower pH value of eluviating solution is, the more fast the Cadmium is eluviated, and the more thequantity of Cadmium is eluviated.

研究结果表明：成都市表生土壤样中有42.86%受镉污染，镉综合污染水平达中度污染，成都市表生土壤镉污染程度与采样点周围环境表现出一定的相关性；除铁锰氧化物结合态镉在部分土壤样中未检出外，所有土壤样均含有可交换态镉、碳酸盐结合态镉、有机结合态镉、残留态镉，且生物有效性较高的可交换态镉和碳酸盐结合态镉占总镉量比例较高；成都市表生土壤中的腐殖质与可交换态镉、有机结合态镉、残留态镉有一定相关性，与碳酸盐结合态镉、铁锰氧化物结合态镉相关性不显著；各形态镉与土壤pH值和全铁的相关性均不显著；土壤中的镉可被酸溶液淋出，重蒸馏水淋出镉量十分微小；随着淋滤液pH值的升高，土壤样的镉淋出量下降，且0～5小时时段的镉淋出量占镉总淋出量比例下降，5～30小时时段的镉淋出量占镉总淋出量的比例上升，对同一土壤样而言，酸度大的淋滤液比酸度小的淋滤液淋出镉速度更快，淋出镉量更大。

The good results can be obtained with the newalgorithm; the local minimal can be avoided in some degree. In this paper, neural networks also were applied to quantitativestructure-property relationships analysis:1Studies on the toxicity of aniline, nitrobenzene and phenol derivatives and their structures.2 Studies on HEPT compounds for their anti-aids.3 Studies on nitrogen mustards and 2-formylpyridine thiosemicarbazone compounds for their anti-cancer.4 Studies on phenol and aniline derivatives for their gas chromatographic retention values.5 Studies on discrimination of tea by Self-organizing feature map network.

本论文还利用上述方法进行了一些定量结构活性相关性研究，主要内容： 1环境中有毒有害有机物的定量结构活性相关性研究。2抗艾滋病类药物定量结构活性相关性研究。3抗肿瘤类药物(氮芥子气类化合物和2-甲酸吡啶缩氨基硫脲类化合物)定量结构活性相关性研究。4苯酚和苯胺类衍生物色谱比移值预测。5将神经网络用于茶叶的分类。

The complexity of bodywork decides variety of it's error. The station and primary factor which cause error is inconstant change and using correlation analysis can find out the primary factor. With an project given, the theory of correlation analysis for dimension variation of bodywork is discussed through correlation analysis and the layer structure of the bodywork,the state in which the error happened can be found out. How to use eigenva...

车体装焊的复杂性决定了误差产生的多因素性，车体制造过程中产生误差的工位和主要因素是不断变化的，采用相关性分析方法从众多的误差根源中准确地发现最主要的误差源；结合工程实践，论述了车体尺寸波动的相关性分析方法的原理，根据测量点的相关性分析和车体焊接工艺的层次结构，可准确地找到产生车体尺寸误差的工位；讨论了如何利用相关系数矩阵的特征值和相应的特征向量判断尺寸波动的模式，指出测量数据的波动主要按最大特征值所对应的特征向量方式波动，引起这种波动的原因是车体误差产生的主要原因，应重点采取措施加以控制；提出了应用计算机进行相关性分析的解决方案。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失