不相关系数

The results of calibration of 4He in desorption system show that the correlation coefficient is more than 0.99 and the contribution of memory effect can be ignored. The contribution of ionized atom T(superscript +) for partial pressure of m/e=3 is very little and is determined according to I+≈0.01I(subscript T2)+, so the measurement of 3He can be done without interference of T(superscript +). The relationship between gases release rate and annealing temperature can be obtained after the data are smoothed and differentiated.

研究结果表明：四极质谱计标定解吸系统内4He的分压＜350 Pa时，其相关系数R＞0.99，且记忆效应的贡献极弱；离子态氚T对m/e=3组分分压的贡献可按I+≈0.01I(下标 T2)+确定，不干扰3He的测定；将气体解吸所得的积分数据经平滑并微分处理后可准确得到气体释放速率与退火温度的关系，即热解吸谱。

The correlative coefficients of linear regression function for isochronous stress-strain curve are all higher than 0.92, and the ratio of long-term strength to instantaneous strength reaches 94.39%, which indicate that the whole creep of fine sandstone specimen is weak.

应力－应变等时曲线线性回归函数的相关系数均高于0.92，长期强度与瞬时强度之比达94.39%，证明细砂岩试样的整体蠕变特性不强。

Results: The good linear range of method was 10 to 1000μg/ml (T=0.9999) with the correlation coeffivient of 0.9999, and the limit concentration in air was 0.2 mg/m^3 with the average relative standard deviation less than 5%(n=6). The average sampling rate ranged from 96.6 to 100%, and the breakthrough capacity of l00mg activated charcoal was 4.7mg. The average desorption rate was 97.6%, and mesityl oxide absorped in activated charcoal tube was stable for 7 days and can be detected accurately with other gas coexisting in the air of workplace.

结果：异亚丙基丙酮浓度在10~1000μg/ml内呈良好线性关系，相关系数0.9999，最低检出浓度为0.2mg/立方公尺，相对标准偏差＜5%(n=6)；气体采样效率≥96.6%，100mg活性炭对异亚丙基丙酮的穿透容量为4.7mg，平均解吸效率97.6%；活性炭样品室温下可保存7天；丙酮、丁酮、异佛尔酮、苯、甲苯、二甲苯等共存物不干扰测定。

Diffusion coefficients for metol and p-benzenediol were 2.1×10 cm^2/s and 2.7×10^6 cm^2/s, respectively. The electrocatalysis mechanism has been studied. ATR-FTIR was used for the characterization of the ME/Au SAMs. The oxidation currents were linear in the range of 1.0×10^(-7)~1.0×10^(-4)mol/L for metol and 6.0×10^(-6)~6.0×10^(-4)mol/L for p-benzenediol, with the correlation coefficients of 0. 9992 and 0.9996 by differential pulse voltammetry, and detection limit 2.0×10^(-8)mol/L and 1.2×10^(-6) mol/L for metol and p-benzenediol, respectively.

采用水平衰减全反射－傅立叶变换红外光谱技术对ME/Au SAMs进行了表征，示差脉冲伏安法同时测定米吐尔和对苯二酚，不产生干扰，其氧化峰电流与相应物质的浓度分别在1.0×10^(-7)~1.0×10^(-4)mol/L和6.0×10^(-6)~6.0×10^(-4)mol/L范围内呈良好的线性关系，相关系数分别为0.9992和0.9996，检测限分别为2.0×10^(-8)和1.2×10^(-6)mol/L。

The relationship between subcritical crack velocity and stress intensity factor is obtained. And the fracture toughness is (1.508 4±0.114 3) MN·m-3/2. The multiple correlation coefficient is 0.925 4, which shows that the curve of lgKI-lgvis linear magnificently, and the high discretion of data is caused by mineral composition, separator size and mechanical property of rock itself.

得出采场矿岩亚临界裂纹扩展速度与应力强度因子之间的关系，矿岩断裂韧度为(1.508 4±0.114 3) MN·m-3/2；试验相关系数为0.925 4，表明lgKI-lgv关系曲线呈直线，数据离散性大是岩石本身的矿物成分、颗粒大小、力学性质的不均匀所致。

In this paper,with respect to the ordinal variables,the definitions of attribute reduction of dominance-based rough set approach in ordered information systems and ordered decision tables are given.Then the approach of sorting objects comprehensively using rough set theory is brought in to obtain a series of ranks.Based on these ranks,nonparametric methods to analyze correlation between two attribute subsets are introduced,and Spearman rank correlation coefficient is used as a measure of attribute correlation.Based on this measure,a new method of attribute reduction of ordered information systems and ordered decision tables is presented without changing the ordinal information of the universe.

针对有序尺度变量，给出了有序信息系统与有序决策表在优势关系下的粗糙集约简定义；利用粗糙集方法将对象综合排序，进而得到一组秩；根据这些秩，运用非参数统计的思想研究了两个属性子集之间的相关性，并将Spearman秩相关系数作为属性相关性度量；在不改变总体序信息情况下，给出了基于此度量对有序信息系统与有序决策表进行约简的新方法。

To establish the condition index curve regular, it can assess dam condition with different time, according to the result of condition index curve.

最后将所获得的渗水量数据，取其非丰水期、且水库水位和渗水量的相关系数大於0.85以上值，做为筛选出不受降雨影响的渗水量值。

The calibration curves for arsanilic,nitarsone and roxarsone were linear over the concentration ranges of 0.5-50 mg/L and their correlation

阿散酸、硝苯砷酸和洛克沙砷的定量线性范围为0.5~50 mg/L，线性相关系数均大于0.999；检出限阿散酸为0.095mg/kg、硝苯砷酸为0.18 mg/kg、洛克沙砷为0.19 mg/kg；保留时间的相对标准偏差不大于0.51%。

The result showed that:the averaged content of organic C in the vegetable field siol of solar greenhouse was 21.6 g/kg,higher than that in the open field soil by 77%.

日光温室土壤有机质、碱解氮的积累规律不明显；速效磷、速效钾、电导率、pH与棚龄间有明显的累积规律，其相关系数分别为0.7368，0.60，0.6547，-0.7206。

Moreover, the radius of attraction of memorized sample patterns is presented. A Hybrid neural network model for pattern recognition is presented. The model consists of a cascade connection of three neural networks, which are hetero—associative NN、2—D local—connected NN and classification NN respectively.

提出了一种适于模式识别的复合神经网络，它由三个小网：异联想记忆网、局域连接神经网和分类网级联而成，其输入为模式的二维自相关系数，输出为预定的编码，此网可以有效地进行平移不变模式识别，且有很好的容错性和抗噪声能力。

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。