防刺防弹复合材料的技术状况探讨

本文论述了防弹防刺复合材料的国内外发展状况、目前国内外所普遍采用的防刺防弹材料状况、防弹防刺复合材料所采用的材料状况、防弹防刺复合材料工艺状况、防弹防刺复合材料结构状况、防弹防刺复合材料的测试技术状况、防弹防刺复合材料的性能状况。     

污水排放预测的多因素灰色模型GM(1,N)及其应用

在分析污水排放数据处理的现状后,运用灰色系统理论,通过优化模型系数与背景取值,建立了多因素灰色GM(1,N)模型。该模型克服了现有GM(1,N)模型的不足,扩宽了GM(1,N)模型的应用范围．具有精度高、使用简便等特点。GM(1,2)计算实例表明,该模型简单实用,值得在污水排放预测中推广应用。     

顾及模型误差的基坑位移监测数据处理方法

由于基坑地质及观测环境的多样性和复杂性,基坑位移监测数据处理的理论模型与实际模型之间存在着模型误差。若模型误差显著,则所得位移拟合模型的精度较差,将影响后继变形分析的准确性。针对这一问题进行了深入研究,提出了顾及模型误差的最小二乘配置法,并指出在考虑观测值中可能存在粗差的情况下应进一步采用稳健估计法改善基坑监测面的拟合精度。推导了顾及基坑位移模型误差的最小二乘配置法的计算公式,说明了计算步骤。通过对多个实例的计算分析可知,该方法对基坑监测面拟合模型的精度增益能达到35%~48%,是一种比较实用的基坑位移监测数据处理方法。     

污泥自热高温好氧消化工艺及影响因素

介绍了污泥自热高温好氧消化(ATAD)技术,其具有污泥稳定与杀菌的双重功效,处理效率高,体积小、运行方便。经过消化处理后的污泥,大部分病原菌被灭活,可以作为一种富养分、高质量的肥土应用于农田。文中对ATAD的工艺原理、流程、反应器构造及影响因素等进行了探讨。     

轻苯加工中产生水污染物的研究与治理

通过对安钢焦化厂精苯车间在轻苯加工中产生的酚水、再生酸、酸焦油等水污染物的分析研究,结合安钢焦化厂的实际情况,提出了相应的治理方法,使精苯车间的生产符合当前的环保要求.     

认知心理学视角下矿工的信息加工模型研

矿工在煤矿井下的生产过程是对外界信息的加工处理过程。矿工能否正确处理外界刺激,将直接产生安全或不安全行为,影响煤矿安全生产,甚至引发重大事故。在认知心理学视角下,应用感觉、注意和记忆理论对矿工行为的形成机制进行分析,建立矿工信息加工模型,并对模型的特点和作用进行分析,同时指出该模型存在的不足。信息加工模型的建立与分析可为安全管理措施的制定及安全培训内容及环节的设计提供理论依据。     

攀钢集团钛业公司选钛尾矿的综合利用

本文研究了攀钢钛业公司选钛尾矿的物质成分,提出了尾矿综合利用的途径：一是有益成分的分离、提取,二是利用尾矿或分选出来的矿物发展建材工业     

Measuring the environmental impact of waste flow management in Brazilian apartment buildings

As biodegradable material represents approximately 70% of household waste in Brazil, any strategy to divert appreciable waste quantities from landfills of necessity has to include valorization and recycling of this material. A societal change of attitude is required to perceive this challenge. Experiments in an urban apartment building are described that produced this change of attitude with a success factor of 80%. Divided waste collection was implemented that separated at the source biodegradable from inert material. Correct collection, handling and display procedures were established. Composting of biodegradable material was carried out under the rooftop of the building as an alternative to using it as animal feed. Half of the inert material entered the reverse logistics chain and was also diverted from the landfill. Waste related material flow through the building is completely quantified, food intake and waste production are related, diversion of both biodegradable and inert waste components from the landfill is measured and the composting process is described. The landfill diversion stands at 61%, mass reduction through the composting process is 80% and matured compost is returned to residents for use in flower cages. The system has been operational for two years and stands out as a precedent in successful decentralized household waste management supported by material flow analysis. Readers should send their comments on this paper to: BhaskarNath@aol.com within 3 months of publication of this issue.     

Fungi Associated with Degradation of Wastes from Rubber Processing Industry

A study of fungi associated with wastes from a rubber processing factory was carried out. Rubber processing wastes, natural rubber waste serum (NRWS) and washing effluents were obtained from Greenpark Rubber Industries Ltd, Umutu, Delta State, Nigeria. The NRWS was collected from seepage from starks of coagulated rubber in the factory and effluents were collected from the four tanks used for washing the coagulated rubber. Three fungal species, Mucor racemous, Mucor sp. and Aspergilus niger, were isolated from the NRWS. From the effluents collected from the four wash tanks, five fungal species were isolated. Mucor recemous, Mucor sp., Aspergillus niger, Aspergillus, sp. and Rhizopus sp. Of all the species isolated, the Mucor species were found capable of utilizing NRWS as a growth substrate. Optimal growth of Mucor in NRWS was achieved at near-neutral pH of 7.1. It was also observed that as biomass of Mucor increased in NRWS, the BOD of NRWS decreased. Pollution strength of the wastes as determined by biochemical oxygen demand (BOD) and total solids were found to be highest with NRWS (440 and 4520) and wash tank (A) (370 and 3520) respectively.