汽车变速箱嵌入式诊断系统设计与实现

根据大跨度中承式拱桥的三维空间结构形式及主拱风荷载相互干扰的特点,提出了抖振响应的非线性时域分析方法.通过节段模型风洞试验,确定了前后拱在相互干扰下的静力三分力系数.结合试验得出的两榀拱的抖振力时程数据,求出前后拱在相互干扰下的脉动风速功率谱.采用谐波合成法模拟大跨度中承式拱桥的三维风场,通过FFT变换、功率谱插值等技术提高了模拟效率.以重庆菜园坝长江大桥为工程实例,进行了考虑几何非线性的时域抖振分析,计算结果与风洞试验结果吻合较好.     

甘蓝型黄籽油菜产量性状的遗传分析

利用加性-显性-母体的遗传模型,分析了7个不同遗传来源甘蓝型黄籽油菜品系所配制的完全双列杂交资料。结果表明,产量性状主要受加性和显性效应共同控制,环境对产量性状有一定的影响而母体效应影响很小。基因效应分析发现y4单株粒重有极显著的加性效应,y3×y4单株粒重有极显著的显性效应     

油桐无性系生产力判别评级与预测研究

根据选自福建、浙江等５个油桐主产省（区）７６个油桐优良单株无性系在金华试验点的生长表现，按照其中已测定含油率、产果量和其它性状的６５个油桐无性系样本，建立了生产力评级的Ｆｉｓｈｅｒ判别模型，该模型对分属Ⅰ、Ⅱ、Ⅲ、Ⅳ４个产油量水平的各无性系的回判正判率分别达到了１００％、１００％、８２％、１００％。进而应用该模型预测了未进行气干果含油率测定的其它１１个无性的生产力等级。据此，从７６个无性系中筛选出４４、４８、５４、５６号４个高产优良无性系。     

《草业学报》引文统计与分析

对《草业学报》从创刊到１９９６年发表论文的引文数量、引文语种、引文类型、自引率、衰减系数等进行了统计和分析，结果表明，《草业学报》的引文率为８．４６条／篇，引文语种：中文占５８．２０％，英文占４０．９１％，此两项测度值均较高；自引率为２．７６％，衰减系数为３３．９６％，均较低；引文类型主要为期刊，占６７．８６％，其次为图书占２８．４９％。上述统计与分析，可供作者、读者和编者全面了解、评价和改进《草业学报》质量作为参考。     

Effect of suckling intensity on human growth hormone binding, biochemical composition and histological characteristics of ovine mammary glands

Suckling both, or only one contralateral mammary gland during 15 days postpartum was utilized to study lactogenic hormone binding to mammary microsomal membranes and quantitative mammary morphology in ewes. Binding of radiolabeled human growth hormone was specific for lactogenic hormones. Non-radiolabeled human growth hormone, ovine and bovine prolactin and human placental lactogen effectively competed with radiolabeled human growth hormone for binding sites but ovine and bovine growth hormone were completely ineffective. Specific binding of radiolabeled human growth hormone to 600 μg of membrane protein averaged 23 ± 3% in all lactating glands. Neither days postpartum nor treatment of contralateral mammary glands substantially altered hormone binding in lactating glands. Specific human growth hormone binding (6 ± 0.5%) in non-suckled glands (15 days postpartum both udder halves) was significantly lower (P<0.01) than in lactating tissue but only a moderate and variable reduction in specific binding was measured in membranes from glands non-suckled for 15 days but contralateral to a suckled gland (14 ± 4%). Specific binding was approximately doubled in assays with 600 compared with 300 μg of membrane protein and the pattern of binding among variously suckled glands was not changed by treatment of membranes with 4 M MgCl₂ prior to assay. Most secretory cells from all lactating glands had rounded, basally displaced nuclei, apical fat globules, secretory vesicles and abundant densely stained basal cytoplasm (ergastoplasm). Alveolar lumenal area was maximal (50% of tissue area) and stromal tissue area was minimal. After 15 days of non-suckling (both udder halves) mammary cells were engorged with lipid, ergastoplasm was reduced and nuclei were irregularly shaped and randomly displaced compared with lactating tissue. In addition, lumenal area was reduced and stromal tissue more evident. Lack of suckling for 5 days had little apparent effect on mammary cytology. Like lactogenic hormone binding, mammary tissue morphology was only moderately altered by 15 days of non-suckling when the remaining gland was suckled. RNA concentration was lowest (2.1 ± 0.3 mg/g) in mammary tissue from ewes in which neither gland was suckled for 15 days postpartum but non-suckling interval had no significant effect when contralateral glands were suckled. DNA concentration was not significantly influenced by suckling treatments. Relative lactogenic hormone binding closely corresponded to changes in cytological and biochemical indices of secretory cell function.     

吉林地区淫羊藿理化分析和有机氯类农药残留量分析

目的：了解淫羊藿中淫羊藿苷含量及在种植过程中有机氯类农药残留量。方法：采用2005年版《中国药典》一部中方法对不同产地的6批淫羊藿药材进行理化分析，以高效液相色谱法分析淫羊藿苷含量，以气相色谱法测定有机氯类农药残留量。结果：不同产地的6批药材中总黄酮含量均在7．4％以上，淫羊藿苷含量在0．20％．-0．29％之间。结论：淫羊藿苷的含量偏低     

大口径埋地塑料排水管的应用前景

结合塑料排水管材的自身特点及目前这一管材在市政排水领域的应用现状，通过多年的工程实践，从国家相关的法律法规及经济技术比较等角度出发，笔者认为大口径埋地塑料排水管替代传统的钢筋混凝土排水管将成为市政工程管网建设中的新趋势。     

博爱县农田林网永续经营技术及效益分析

分析了博爱县农田林网形成后在生态、经济、社会等方面所产生的显著效益。总结了实现农田林网永续经营的具体方法。为平原地区农田林网的经营与管理提供了很好的依据。     

SPSS在林业生产和科学研究中的应用实例解析

SPSS作为统计分析工具,具有数据管理、统计分析、趋势研究、制表绘图、文字处理等功能。本文从科技推广角度出发,结合典型实例介绍SPSS统计软件在林业生产和科学研究中的应用。     

近43年黄河上游来水来沙变化特点

选取黄河头道拐站实测水沙序列(1960-2002年)资料,对水沙序列进行了多时间尺度和趋势识别的小波分析。结果表明:①黄河上游来水来沙量汛期所占比例减少,而非汛期所占比例增加;在年际变化上,水沙量逐年减少;同时,水沙相关关系具有一定的变化;②黄河上游水沙序列具有相同的多时间尺度(准周期)变化,但同一尺度下,水沙所处的丰枯变化并不一致;③年水沙序列趋势变化基本一致,20世纪80年代以来,两者存在明显减少趋势;但在非汛期,两者的趋势变化有较大区别。