油井水泥抗压强度与声阻抗关系的实验研究

按国家标准浇铸油井水泥试块，养护24h后测其声阻抗及抗压强度。实验表明，水泥试块在水灰比为0．38－0．62时，水泥试块的声阻抗与抗压强度间呈非线性关系。养护时间不同，其抗压强度有明显的差异。     

霍耳效应实验分析

对霍耳效应测量磁感应强度的实验原理作了分析，讨论了外界定向干扰磁场对实验的影响。指出在实验教学中，相邻霍耳效应测量仪摆放距离宜大于等于2.5m才能有忽略相互干扰。     

空值环境下基于精集理论的知识表达研究

讨论了空值的有关问题，并在基于粗集理论的知识表达系统中引入空值，提出了知识表达系统中空值的分类处理，并给出了分类处理的算法，从而为在表示知识的元组信息不完整的情况下，充分利用空值的有用信息，为决策者处理不同层次上的参考信息提供了重要思路。     

锈色尖毛虫（Oxytricha ferruginea）的形态学重描述及与相近种的比较（纤毛门，腹毛目）

利用活体观察、蛋白银染色技术对淡水腹毛目纤毛虫－锈色尖毛虫（Oxytricha ferruginea Stein,1859)的青岛种群之活体形态学及纤毛图式做了研究。其特征如下：虫体浅黄褐色；表膜下颗粒为铁锈色，聚合成组并作纵向不规则排列。口围带平均小膜数为35。额、腹、横棘毛为典型8：5：5方式排布；尾棘毛恒为1根。背触毛5例，其中4例完整，1例不完整。伸缩泡位于体左侧前1／3处，具两根收集管。与相近种比较表明，O.ferruginea与前人所报道的另一淡水种O.aeruginosa极可能是同一种，因此本文建议将两者合并。     

数学教育及其发展趋势

阐述了数学教育发展的国际化、大众化、技术化和理论化趋势。     

人胎盘G—蛋白ab3a cDNA的克隆

为了获取全长的小分子G－蛋白Rab3a，以用于研究Rab3a与其他蛋白相互作用关系，本实验以人胎盘总cDNA为模板，PCR扩增到人Rab3a cDNA全编码区。产物回收后克隆于质粒pYESTrp2的BamHI/Xhol位点，测序结果表明，本实验获得的Rab3a cDNA包含了起始和终止密码子。与PCR引物设计的参照Rab3a比较有5个核苷酸变异，与翻译的氨基酸序列完全一致。由此表明本实验获得的Rab3a cDNA可用于进一步研究。     

Chinese Wall策略及其在多级安全中的扩展

Chinese Wall安全策略因不同于BLP的动态特性而备受人们关注，但Brewer和Nash定义的Chinese Wall策略只适用一定的应用范围， 没有考虑普遍存在的多级访问控制的限制条件。本文主要结合多级安全环境，分析研究具有多级访问控制环境的Chinese Wall策略的扩展实现。根据该环境中的Chinese Wall的利益冲突处理表现为数据聚合问题，利用数据标签的格级标定，提出一种基于历史访问库和利益冲突聚合链表的安全策略实现方法。     

Reproductive Biology and Prospects for Conservation of Caldesia parnassifolia (Alismataceae)——A Threatened Monocot in China

Caldesia parnassifolia (Bassi ex Linn.) Parl. in China has declined in number in recent years and is increasingly faced with the risk of extirpation arising from anthropogenic changes associated with rapid urbanization and expansion of both agriculture and infrastructure. To aid in provision of the data needed for effective conservation of the species, studies on the habitat, pollination ecology, and breeding system of C.parnassifolia were carried out on natural populations occurring in Southeastern China. Flowering in the study populations extended for more than eighty days beginning in early summer. Floral anthesis occurred in the morning hours and proceeded rapidly, lasting about 45 min. Flowers lasted ca.8h. Caldesia parnassifolia is self-compatible; however autogamy resulted in lower seed set than geitonogamy and xenogamy as well as free pollination. The data on pollen/ovule (P:O) ratio is consistent with a partially selfing and outcrossing mating system. Interpopulational crosses yielded similar seed set to within-population crosses. Agamospermy did not occur in the study populations. Propagation is achieved through seeds as well as through turions which commonly occur in the inflorescences. Flies (Insecta; Diptera) were the most frequent visitors to the flowers of C.parnassifolia; however bees (Insecta;Hymenoptera )composed a larger proportion of effective pollinators. The Syrphidae species Sphaerophoria indiana (Bigot) presents evidence of oligolectic foraging behavior. Recommendations are made on the immediate steps necessary for conservation of Caldesia species in China.