直列4缸内燃机双轴平衡系统设计

直列4缸平面布置曲轴内燃机存在不平衡的二阶往复惯性力,采用兰氏双轴平衡系统,可以平衡二阶往复惯性力,使内燃机的噪声和振动明显下降。     

基于Java的温室远程控制系统的研究

主要介绍了一套温室智能控制系统,利用上下位机的通信将温室环境因子以及设备运行状态传递给数据库,然后通过Java Web的开发,使得身处异地的管理者能够观测,并控制温室的运行状态,从而实现异地办公。     

镉胁迫对水稻的影响及其调控技术研究进展

为了防治稻田镉污染并为选育与栽培低镉积累水稻新品种提供参考,本研究综述了重金属元素镉(Cd)对水稻糙米与精米及营养器官镉含量、水稻种子萌发及幼苗生长、水稻根系生长与生理生化性状、水稻营养代谢、水稻生长发育与产量及米质、水稻细胞遗传等的影响;最后提出了水稻镉胁迫的调控措施和技术,如土壤调控技术、育种技术。     

油茶根腐病发生规律和综合防治研究

油茶根腐病是油茶林的新病害，植株自发病至死亡为２～３年，其病菌为根际土壤习居菌，喜酸性和较低温度，病菌侵入植株的途径主要是伤口，潜育期２０ｄ左右．防治本病的关键是保护幼树根颈部及主根不受伤害，加强管理，增强树势．此外，用熟石灰在根际处与表土层拌匀覆盖和用多菌灵、退菌特等杀菌剂及时进行防治，并辅以营林技术措施治理，可收到良好的防治效果．     

二行程双向旋转小型汽油发动机的研究

通过对作者的专利技术“二行程双向旋转小型汽油发动机”（专利号：９５２０２４２８．４）的力学计算及实验测试,进一步阐明了这种新型动力机械的先进性及可行性,并推断出其使用寿命可比原单向旋转的同型号的发动机延长６０％．     

Sampling for adults of the planthopper Myndus crudus a vector of lethal yellowing of palms 1

Abstract

Tests were made using coloured sticky traps to determine trap efficacy in catching adult Myndus crudus Van Duzee (Homoptera, Cixiidae) under field conditions. Blue traps caught more M. crudus adults than any of the other colour traps tested. Blue traps caught adults of both sexes during the day and night although significantly more adults were caught during the day. A sampling bias was shown in that blue traps caught significantly more males than expected from the field population. Blue sticky traps were more effective at sampling adult M. crudus populations than previous sampling techniques based on host plant attractiveness and should be considered for use in future sampling.     

Immunocytochemical localization of the Bacillus sphaericus binary toxin components in Culex quinquefasciatus (Diptera: Culicidae) larvae midgut

This study describes the immunocytochemical localization of the Bacillus sphaericus 2362 binary toxin components, BinA and BinB, in Culex quinquefasciatus larvae that had been intoxicated with this entomopathogen. Ultrathin sections of C. quinquefasciatus larvae midgut embedded in the hydrophilic resin L.R. White were incubated with the antibodies anti-BinA or anti-BinB and then revealed with goat anti-rabbit IgG coupled to gold particles. Immunocytochemical detection demonstrated the presence of specific labeling in ultra-thin sections that had been incubated with the BinA antiserum. Gold particles were detected on the apical areas of cell membranes and inside the epithelial cell cytoplasm, particularly the mitochondria, of cells from the gastric caeca and posterior stomach in larvae exposed during 2 or 24 h to the entomopathogen. A similar labeling pattern was observed in ultrathin sections from both midgut regions when incubated with BinB antiserum.     

鞭角华扁叶蜂防治研究

对鞭角华扁叶蜂进行5年防治试验,在幼虫危害盛期用1:3000～2000倍20％氰戊菊酯乳油、1:1000倍50％甲胺磷乳油喷雾防治,幼虫越冬期的当年11月～次年2月对受害林地进行深翻,成虫羽化高峰期用1:1500倍50％甲胺磷乳油和80％敌敌畏乳油混合液喷雾防治均能达防治目的。     

棉花虫害诊断系统的设计与Web实现

为了推广棉花虫害诊断知识,满足更多棉农对领域专家诊断的需求,该文利用Java和Web技术,并以SQL Server2000为数据库开发工具,设计了一套网络化的棉花虫害诊断系统,实现了借助互联网对棉花虫害进行远程诊断的目标。该系统引入了模糊推理与案例相结合的方法,对棉花虫害的诊断及原有知识获取方法进行改进,提高了棉花虫害诊断的准确度和效率,弥补了单纯运用案例检索方法诊断的不足;系统不仅提供了知识浏览、案例查询、专家咨询等功能,可为棉农提供快速、方便、准确的智能查询服务,而且可通过专家咨询功能,向棉农提供在线远程会诊服务。