猪淋巴肉瘤病理形态学观察

笔者在肉品卫生检验中,发现猪全身性淋巴肉瘤,经形态学和组织学观察,证实淋巴肉瘤的细胞是大量淋巴样细胞聚集,且多数为未成熟和正发育的淋巴细胞.     

Awareness of the structure and meaning of morphologically complex words: Impact on reading

Many new words middle school children encounter in books they read are relatively transparent derived forms whose meanings might be figured out through analysis of the word parts. Of importance is whether students can not only read and recognize the structure of morphologically complex words but also determine their meanings. This issue was addressed by investigating the relationship of third and fifth graders' awareness of the structure and meanings of derived words and the relationship of these forms of morphological awareness to word reading and reading comprehension. The results showed that awareness of structure was significantly related to the ability to define morphologically complex words; some aspects were also significantly related to the reading of derived words. The three morphology tasks accounted for significant variance in reading comprehension at both grade levels, but the contribution was stronger for the fifth than the third grade. It may be educationally noteworthy that morphological analysis contributed significantly to reading comprehension for the third graders because they are presumably just beginning to learn to read and understand morphologically complex words.     

形态学算子在图像处理中的应用

将腐蚀、膨胀算子经过有效组合,形成了一个性能优良的滤波算子,同时介绍了在冲击噪声的去噪中表现出显著效果的Extrema killer算子。提出了一种基于数学形态学的边缘检测算法,该算法先用一个较小尺度的结构元素进行腐蚀,后用一个较大尺度结构元素进行膨胀,用（fθB1） B2-f作为边缘检测算子。实验证明用所给算法进行图像边缘检测,能较好地保持图像的细节特征,同时能有效的抑制噪声。     

我国东北胡枝子属及其近缘属的花粉形态和分类研究

 The pollen morphology of 11 species and 1 variety in the genus Lespedeza and its allied genera (Campylotropis, Kummerowia) from NE China was examined under light and scanning electron microscopes.      1.  Lespedeza Michx. (plate 1:1-6; 2:1-6; 3:1-6; 4:1-2)      Pollen grains prolate, rarely subprolate or spheroidal, elliptic or rarely suborbicular in equa- torial view, 3-lobed-rounded in polar view, tricolporate, colpus margins smooth or jagged.  Polar axis 20.7-33.1μm long, equatorial axis 15.4-20.9 μm long.  Exine reticulate or foveolate, lu- mina verrucose or smooth under SEM.      2.  Campylotropis Bge. (plate 4:3-4)      One species in NE China, C. macrocarpa (Bge.) Rehd.  Pollen grains prolate, elliptic in equatorial view, 3-lobed-rounded in polar view, 3-colporate, colpus linear, 25.1μm long, 1.79μm broad, colpus margins jagged, with a series of verrucae equal in size along one side visible under SEM.  Polar axis 19.7μm long, equatorial axis 14.6μm long.  Exine reticulate, lumina nearly rounded, verrucose at periphery under SEM.       3.  Kummerowia Schindl. (plate 4:5-6)       Pollen grains spheroidal, oblate or prolate, elliptic in equatorial view, obtuse-triangular in polar view, tricolporate, colups linear, 25.1μm long, 2.01μm  broad,  colpus margins sinuate. Polar axis 24.7-27.9μm long, equatorial axis 19.7-26.6μm long.  Exine reticulate or subreti- culate, lumina nearly rounded, with verrocae visible under SEM.       According to the pollen morphology of Lespedeza and its allied genera, the division of Lespedeza (s. lat.) into Lespedeza (S. str.), Campylotropis and Kummarowia by Schindler (1912) is reasonable.  The subdivision of Lespedeza (s. str.) into Sect.  Macrolespedeza and Sect. Lespe- deza by many botanists, and the treatment of Lespedeze juncea  (L. f.) Pers. var. inschanica Maxim. as an independent species (i.e. Lespedeza inschanics (Maxim). Schindl.) are also suppor- ted by the pollen morphology shown in the present work.     

世界优秀男子110m栏运动员身体形态特征与运动成绩分析

通过对世界优秀男子l10m栏运动员速度、时间参数的统计处理与分析。表明最大栏间速度是决定成绩的关键因素;世界优秀110m栏运动员具有发挥速度快,加速能力强的特点:栏间速度变化均匀,节奏平稳是世界优秀运动员的一个显著特点;从分段时间看,影响成绩的关键区域是第2和第3跑段。     

二语英语中屈折词缀缺失研究及其对外语教学的启示

英语二语学习者在使用英语时,经常会缺失动词的表示一致关系或时态的屈折后缀。本文探讨了目前对此问题的研究及其对英语学习和教学的启示。文章首先呈现英语二语学习者使用英语时丢失屈折后缀的证据,然后介绍了分布形态学和双机制理论对此问题的解释,在剖析英语二语学习者丢失屈折后缀的原因后,探讨了该研究对英语学习和教学以及测试的意义和启示。     

葡萄属植物花粉形态的研究

 利用扫描电子显微镜对葡萄属Vitis L．37个类群(包括32种、1亚种和4变种)以及其近缘属麝香 葡萄属Muscadinia(Planch．)Small一种植物的花粉进行了观察,结果表明,葡萄属植物的花粉形态特征 在区别并鉴定属下的种类时有较大价值,但对种以上的分类以及研究系统演化无多大意义。葡萄属植 物的花粉形态特征可以分为4类：(1)花粉粒扁球形或圆球形(P/E值为O.97-1.08),沟较宽,可见被有 较密颗粒状突起的沟膜,属于该类的有紫葛V．coignetiae Pull．ex Planch．;(2)花粉粒长球形至近长圆球 形(P/E值为1.25～1.76),沟较宽,可见有较疏颗粒状突起的沟膜,该类型包括了庐山葡萄V．hui Cheng 等共10种1亚种3变种;(3)花粉粒长圆球形(P/E值为1.87～2.1),沟边缘紧靠合呈直线状,但在赤道 轴萌发孔处沟边缘分开呈菱形,该类型有秋葡萄V．romanetii Roman du Caill．ex Planch．和锈毛刺葡萄V． davidii(Roman du Caill．)Foex．var．ferruginea Merr．et Chun等1种1变种;(4)花粉粒长球形或超长球形 (P/E值为1.30～2.0),沟边缘紧靠成直线状,麝香葡萄Muscadinia rotundifolia(Michx .)Small等21种的花粉属于此类型。