Intersexual plasticity in aspects of the biology of the mudskipper Periophthalmus barbarus (Gobhdae) in the mangrove swamps of IMO Estuary, Nigeria

Between April 1992 and March 1993,intersexual plasticity in aspects of the biology of the mudskipper,Periophthalmus barbarus was studied.Sec was differentiated on the basis of the genital papillae,it was broader in females than males.Sexually active females were slightly heavier than similarly-sized males.Sex ratio was strongly female-biased.Length-weight relationship of the sexes was isometric.There was no significant difference in the feeding intensity of both sexes;uniformity was also apparent in diet breadth.There was no named sex-based difference in hepatosometic index but condition index was higher in males than females.the uniformity in intersexual plasticity of P.barbarus is consequent upon homogeneity of the mangrove ecosystem,which can only be altered anthropogenically.     

城市环境系统的权重分配--多目标二级决策法

本文将多目标二级决策法用于城市环境系统的权重分配 ,对城市环境系统各要素及各要素的表征参数进行客观自动赋权 ,克服了环境质量评价中权重分配的主观随意性。该方法物理意义清晰 ,算法简便 ,具有较好的应用价值     

集对分析用于污水处理厂的综合评价

应用集对分析方法，建立了综合评价污水处理厂的定量模型。该模型综合考虑了与污水处理厂有关的技术、经济、管理及环境效益等方面的诸多因素，根据加权同一度对各厂的综合效益进行了优劣排序，并以实例说明了该方法的应用，具有概念明确、计算简便和实用的特点。     

序列综合—专家咨询：生态农业综合排序评价法的应用

本文论述了利用专家咨询—序列综合法确定指标内涵性权重和数据结构性权重，利用指数叠加模型进行生态农业综合排序评价的原理和方法。通过对１１个生态农业试点的实际评价和实践应用，证明了这种评价方法的可行性。当时多于５个生态农业试点进行一般性评价时，该方法具有科学、实用、简便和易于推广等特点。     

城市生活垃圾的工程特性

通过对江苏省泰州市生活垃圾的物理成分、物理特性的调查分析,得出泰州市生活垃圾不适于焚烧和堆肥处理,可以采用填埋方法的处理结论,为今后我国城市生活垃圾卫生填埋场的设计提供理论依据,并为废弃物减量化、无害化与资源化提供选择措施。     

模糊评价模型的改进及其在水质评价中的应用

通过将熵值赋权与模糊评价模型相结合，建立一种新的综合评价模型——熵权模糊评价模型，其运用熵值来确定权重系数，避免了传统评价模型主观赋权的局限性，并应用这种新方法对闽江的魁岐等4个断面进行水质评价。     

Studies on the enzymatic and fungal degradation of cross-linked gelatin and its graft copolymers

Glutaraldehyde cross-linked gelatin was graft copolymerized with acrylic acid, acrylamide, vinyl acetate, methyl acrylate, and methyl methacrylate either individually or in combination. The enzymatic and fungal degradation of these graft copolymers with trypsin, pepsin, and mixed cultures ofAspergillus niger, Penicillium ochrochloron, Penicillium funiculosum, andTrichoderma viride was studied for short and extended periods. The weight loss suffered by the samples, the weight of biomass formed, the nitrogen content, and the pH of the culture medium were determined. With the help of these data, the extent of utilization of graft copolymers by fungi as a sole source of carbon was estimated. The samples with less than 100% grafting and with a ratio of polymethyl methacrylate content (L) to polyacrylic acid (H) content (L/H values) lower than 1.0 were readily and extensively degraded.IICT Communication No. 3375.