一种对象式软件开发方法及其支持工具

提出了一种改进的对象式软件开发方法,该方法支持从概念建模、逻辑建模到实现的软件开发全过程;介绍了支持这种方法的图形化需求描述语言、形式化需求规格说明语言、由图形化向形式化的转换及由形式化向实现转换的方法和机制;简要地介绍了支持这种方法的一个软件工具的设计与实现。     

钢桥面板纵肋现场对焊接头的疲劳性能

对8个具有正交异性钢桥面板角钢纵肋现场对焊接头的试件进行了静力和疲劳试验研究,纵肋接头采用手工仰焊,考虑了纵肋对中偏差．试验结果表明纵肋对中偏差对接头的静力和疲劳性能有重要影响,经回归分析得到了疲劳强度曲线,为钢桥面板这类接头的疲劳设计提供了依据．     

乙烯基酯树脂的合成新法及其性能研究

由2,2-(4,4′-二羟乙基酚基)丙烷与甲基丙烯酸等不饱和酸的酯化产物溶解于苯乙烯中,制成了能室温固化、常压成型的BEM-3型乙烯基酯树酯。分析和探讨了树脂的结构,测定了固化树脂及玻璃钢的性能。结果表明,采用的新合成方法是成功的。该法不仅简化了生产工艺,降低了成本,开辟了合成乙烯基酯树脂的新途径,同时也提高了树脂的耐热和耐腐蚀性能。     

利它素对赤眼蜂寄主搜寻行为的影响

室内检测了赤眼蜂对其寄主的鳞片提取物(利它素)引起的滞留搜寻时间反应.结果表明广赤眼蜂对欧洲玉米螟利它素比亚洲玉米螟的滞留搜寻反应时间明显延长(P=0.0001),并表现出对寄主种类的一定选择性.     

工作状态下钻头动态特性分析

从理论上分析了工作状态下轴向切削力和扭矩对钻头类构件动态特性的影响。利用三维四面单元推导出适合任意复杂截面特性结构的有限元方程式。给出了工作载荷对钻头动态特性影响的结果。     

聚对苯二甲酸乙二醇酯切片熔体流变特性

采用毛细管流变仪和Brabender流变仪测试了聚酯切片熔体的流变特性,发现熔体的粘度对温度非常敏感,熔体切变稀的现象很明显,讨论了粘度特性对物料加工温度等参数的影响     

HMCAIC软件开发中的对象行为模型和对象交互模型的设计

:结合HMCAIC软件开发实际,论述软件中主要的对象行为模型(ObjectBehaviour Models—OBM)和对象间的交互模型(ObjectInteractive Models—OIM)的设计.通过应用OSA 方法建立对象模型,清晰地勾勒出软件模块,为软件的详细设计和程序代码实现奠定坚实的基础     

卡维地罗的示波极谱法测定

在ｐＨ＝５３０的ＫＮＯ３－ＫＨ２ＰＯ４－Ｎａ２ＨＰＯ４底液中,用单扫示波极谱法可以得到一个灵敏的卡维地罗导致还原峰,其峰电位为－１．４３Ｖ（ｖｓ．ＳＣＥ）,峰电流与卡维地罗浓度在２０－３０μｍｏｌ·Ｌ＾－１范围内呈线性关系（ｒ＝０．９９９８）检出限为０．５０μｍｏｌ·Ｌ＾－１,该法应用于模拟尿样和片剂中卡维地罗含量的测定。结果令人满意。     

Hibernation and emergence pattern of Tupinambis merianae (Squamata: Teiidae) in the Taim Ecological Station,southern Brazil

The emergence period and winter aggregations of a population of Tupinambis merianae from southern Brazil as well as some behavioural aspects from its post‐emergence period are examined. Fifty‐six individuals were captured and marked in 64 days (640 h) of field study. Most of the hibernacula identified were beneath human constructions. The first individuals emerged in August and the last active ones were observed in April. The population's emergence shows a protandric pattern, where males emerge before females, both in adults and juveniles. After emerging, males basked in aggregations of up to 13 individuals, in which individuals changed positions following audible resonant signals emitted by the lizards. Sibilated sounds were emitted in stress situations or in agonistic interactions. Future studies are necessary to elucidate behaviour patterns of the species in the natural environment, mainly related to the utilization of sound communication.     

Polyphagy and florivory prevail in a leaf-beetle community (Coleoptera: Chrysomelidae) inhabiting the canopy of a tropical lowland rainforest in southern Venezuela

ABSTRACT

Embedded within the interdisciplinary research project ‘Towards an understanding of the structure and function of a Neotropical rainforest ecosystem with special reference to its canopy’ organised by the Austrian Academy of Science, the canopy beetle fauna was surveyed by means of a 42 m tall tower crane. This paper presents results of the chrysomelid beetle fauna observed and collected at canopy trees for 1 year. A total of 1783 adult leaf beetles were collected, representing 117 morphospecies (Bruchinae are not included) including 31 singletons. The most abundant family was Galerucinae sensu stricto with 827 individuals (46% of collection). The most speciose subfamilies were Galerucinae sensu stricto followed by Alticini, Cryptocephalinae and Eumolpinae. Nineteen species collected with at least two individuals were restricted to a single tree species whereas 68 species were found to feed on several canopy host trees. Only a few species fed on leaves; these were in Cassidinae, Cryptocephalinae, Eumolpinae and Galerucinae. Strikingly, most canopy chrysomelids were collected at flowers of canopy trees, although some species fed also on extrafloral nectaries or fruits. Alticini were restricted predominantly to flowers, but Cryptocephalinae, Eumolpinae and Galerucinae revealed broader plasticity in host tissue selection. Insights into beetle seasonality, diurnal/nocturnal activity and intra-canopy migration are provided. Abundant flower-visiting species occurred on their host trees commonly over the entire flowering season, with their abundances often correlated with the number of open flowers. After termination of one tree’s flowering season, many flower-visiting leaf beetles moved to other flowering trees. Certain congeneric species of Galerucinae and Eumolpinae occurred together at their host plants within the same periods.