聚乙烯基木塑复合材料动态弹性模量预测模型1）

以PE基木塑复合材料的动态弹性模量预测模型为研究对象,利用无损检测的方法对PE基木塑复合材料的动态弹性模量进行检测。将制备方式与实验结果分别利用回归预测模型与灰色理论系统的GM（1,N）／GM（1,N,X（0））模型进行拟合预测,结果表明灰色GM（1,N,X（0））模型对PE基木塑复合材料的动态弹性模量有比较好的拟合能力和相对高的预测精度。     

一个高效实现灰色关联分析的R程序

灰色关联分析模型是一种广泛应用于各个科研领域的重要的统计模型,但其数据处理过程计算量很大。R是一门高级统计计算编程语言,可以在通用公共许可(GPL)规则下从互联网免费获取。该研究基于灰色关联分析方法设计了一个可快速自动计算邓氏关联度的R程序,通过成功应用于实例,验证了本程序的可行性和高效性。     

不同类型大豆性状间的灰色关联度分析

应用灰色关联度方法对春、夏、秋三种类型大豆各性状间的相互关系作了分析，结果表明：分枝数、总荚数与出苗－开花日数关系密切，单株粒重、百粒重、种子蛋白质含量与开花－成熟日数关系密切，株高、节数与全生育日数关系密切；单株产量与节数和分枝数有关．与毛色、粒形密切相关；种子蛋白质含量与种子大小、节数、毛色、粒形、粒色及植株含氮量紧密相关．     

灰色关联度分析在玉米品种评价中的应用

采用灰色关联度分析法,对2005年重庆市玉米区域试验平丘A组中的9个参试品种(组合)的13个性状进行了分析。综合评价结果表明,沈鸿一号综合性状最好(r=0.873 1),华试301(r=0.862 6)、沈鸿三号(r=0.791 0)综合性状较差。     

三种分析方法对小麦新品种的综合评判

为对小麦新品种进行综合评价，以10个小麦新品系的主要性状为指标，采用相同的原始数据和权重系数，运用模糊综合评判、DTOPSIS法、灰色关联度分析对其进行综合评判。结果表明，采用DTOPSIS法评判结果为E、A、D三品系综合性状最好，J、F品系最差；灰色关联度分析评判结果为E、D、C、A品系综合性状最好，I、F品系最差；模糊综合评判结果为E、C、D品系为优良品系，H、F品系最差。三种综合评判小麦新品种优劣的顺序虽存在一定的差异，但变化总趋势基本一致，其中综合评判E、D为优良品系，F品系最劣，这与品系的实际表现相一致。     

Assessment of the accuracy of testicular dysfunction detection in male donkey (Equus asinus) with the aid of colour-spectral Doppler in relation to plasma testosterone and serum nitric oxide levels

This study aimed to determine the usefulness of colour and pulsed Doppler modes for the accurate diagnosis of donkeys suffering from subfertility to determine whether testicular vascularity assessment could be an indicator for sperm functionality. The study sample was composed of 10 male donkeys with normospermia (control group) and 10 donkeys with hypospermia. Animals underwent scrotal circumference measurement, testicular Doppler examination, seminal evaluation, blood sampling and hormonal assay. Semen volume and concentration were significantly (p ≤ .05) lower in the subfertile group (30.25 ± 1.22 ml and 89.44 ± 2.55 × 10⁶/ml) as compared with the control group (82.76 ± 1.65 ml and 452.78 ± 1.25 × 10⁶/ml), and total sperm/ejaculation was significantly (p ≤ .05) higher in the normal donkeys (28.30 ± 2.32 × 10⁹/total ejaculated) as compared with the subfertile group. Intratesticular coloured area showed a marked decline in the hypospermic males. There was no significant difference between the two groups in testosterone level, although the normal group showed an increase in nitric oxide metabolites. Both Doppler indices of the three branches of the testicular artery were elevated significantly (p ≤ .05) in abnormal donkeys, whereas Doppler peak systolic and end-diastolic velocities were increased in the normal group. Male donkeys with subfertility demonstrated lower arterial vascularity parameters in the form of intratesticular coloured area and blood flow rate; therefore, the most optimal parameters for differentiating subfertile hypospermic from normospermic donkeys were found to be the two Doppler indices, velocities parameters, testicular blood flow rate and nitric oxide levels.     

Diagnostic orientation values for ACTH and other parameters for clinically healthy donkeys and mules (insulin,triglycerides, glucose,fructosamines, and ɣ-GT)

Pituitary pars intermedia dysfunction is the most prevalent endocrine disease in horses. Although donkeys and mules may also be affected, only a few data have been published. Reference values for diagnostic parameters, such as adrenocorticotropic hormone (ACTH), are especially scarce or even lacking. Therefore, in the present study, available data from the literature have been verified and completed to facilitate a reliable diagnosis. Clinical inspections and haematological and biochemical examinations were carried out four times in a three-month interval (February to November) in 44 donkeys and 31 mules. Data from clinically healthy animals were used as an orientation. Plasma ACTH concentrations showed seasonal changes in both animal groups. However, it was generally higher in donkeys than mules. Although blood glucose (EDTA plasma) showed no difference between groups, serum insulin concentrations were consistently higher in donkeys. Serum fructosamine levels were slightly higher in mules, whereas, in some cases, serum triglyceride levels were considerably higher in donkeys. Serum gamma-glutamyltransferase showed a striking peak in mules in August, whereas the remaining gamma-glutamyltransferase values were lower compared to donkeys. By comparing donkeys and mules, the present work reveals differences in various blood parameters which should be considered for diagnoses and future studies.     

六安市淠河水质时空变异研究

应用改进的灰色关联分析法对2001~2007年六安市淠河水质进行全面评价与分析,不仅采用"中心化"方法进行数列的无量纲化处理,还运用点到区间距离法计算关联系数,克服了传统灰色关联分析法的不足,使评价结果更为合理和可行。结果表明,2001年水质级别为Ⅲ类,轻度污染;2002年和2004年的水质较清洁,水质级别为Ⅱ类,其中2002年比2004年的水质好;2003年、2005年和2006年的水质清洁,水质级别均为Ⅰ类,其中2003年比2005年、2006年的水质好;2007年水质级别为Ⅲ类,轻度污染。2001~2007年水质均能达规划目标,2001~2006年水质逐渐变好,但2007年水质有反弹趋势。2007年度,窑岗嘴大桥和大店岗断面的水质均为Ⅰ类,光华厂渡口和新安渡口断面的水质级别均为Ⅱ类,各断面水质较清洁。同时在2007年度,枯水期、丰水期、平水期淠河水质依次属于Ⅰ、Ⅱ、Ⅲ级,总体水质较清洁,但平水期水质受轻度污染。     

动态指标序列聚类分析技术及其应用

提出一种基于动态指标序列灰关联度的聚类分析方法，并将它用于全国各地区木材生产企业经营效果的综合评价。     

Excel在油菜菌核病灰色预测模型构建中的应用

灰色系统理论，为病虫害预测预报提供了新的途径与方法。灰色预测模型的计算，其中关键是计算微分方程^AX（1）（K 1)=(x^(0)(1)-u/a)e^-ak u/a的解。利用Excel计算求解，具有操作方法简便易行，结果准确可靠、实用性强的优点。本文根据洞庭湖区1980～1992年油菜菌核病发病资料，利用Microsoft Excel 200进行计算，建立灰色GM(1，1)长期预测模型，经检验该模型精确度高，预测结果可靠。