区域环境质量综合评价的一种方法——Fuzzy概率法

本文应用Fuzzy概率原理,在对区域环境内各单项污染指标进行分级评价的基础上,考虑各单项污染指标在总体中的权重,并综合各单项污染指标的作用,给出区域环境内环境“总”质量的综合评价。     

Eco-environmental information system of Tianjin City─Design, implementation and applications

Ｅｃｏ－ｅｎｖｉｒｏｎｍｅｎｔａｌｉｎｆｏｒｍａｔｉｏｎｓｙｓｔｅｍｏｆＴｉａｎｊｉｎＣｉｔｙ─Ｄｅｓｉｇｎ，ｉｍｐｌｅｍｅｎｔａｔｉｏｎａｎｄａｐｐｌｉｃａｔｉｏｎｓＨｕＸｉａｏｌｉｎ；ＹａｎｇＢａｎｇｊｉｅ；ＺｏｎｇＹａｏｇｕａｎｇ；ＬｕＬｉ（Ｒ...     

Influence of different inoculation densities of black soldier fly larvae (Hermetia illucens) on heavy metal immobilization in swine manure

The disposal of organic waste by the biocomposting of black soldier fly larvae (BSFL) has drawn broad attention. However, the discrepancies in heavy metal immobilization between BSFL biocomposting with different inoculation densities and aerobic composting need to be further researched. In this study, BSFL with inoculation densities of 0.08%, 0.24% and 0.40% was added to swine manure to investigate its influence on heavy metal bioaccumulation and bioavailability. The physicochemical properties, BSFL growth performance and amino acid contents were measured. The results showed that the germination index, total prepupal yield and bioavailable fraction removal rate (%) of Cr and Pb at an inoculation density of 0.40% of BSFL were the highest among all of the BSFL biocomposting groups. Although the bioaccumulation factor and heavy metal (Cd, Cr, Cu and Zn) concentrations of the BSFL body from swine manure with inoculation densities of 0.24% and 0.40% of BSFL were similar, the BSFL inoculation density of 0.40% had the best absorption effect on these heavy metals in terms of total prepupal yield. Therefore, this study provides a basis for exploring the optimal inoculation density of BSFL biocomposting to reduce the harmful effects of heavy metals in swine manure.

     

An interactive simulation model of urban ecosystem and its implementation

An interactive simulation model is established based on the methodology of "sensitivity model" (SM) during the cooperative research process between the founders of SM and the authors. And the conceptual framework of SM is developed into the interactively qualitative and quantitative simulation model presented in this paper, which makes it possible to break down a complex urban ecosystem into simple and visual quantitative or qualitative relationships between the factors. By studying the dynamic responses of the system to the changes of the inputs and parameters of the model, future trends in urban development can be predicted and strategies formulated. The whole process is realized on micro-computer in the course of man-computer interaction. Its potential use is shown in a case of Tianjin City.     

塔机起重作业夜间照明工效的BIM辅助优化研究*

为提升塔式起重机施工作业的夜间照明工效水平,采用数学模型和BIM技术相结合的方法,以灯源的光通量及入射角为光学驱动参数,模拟眩光值、照度及其均匀度等光学变量,建立照明工效的光度学BIM辅助优化模型,优化起重作业照明灯源光学参数。研究结果表明:对塔式起重机施工作业区照明灯源光学参数进行组合优化后,夜间起重作业面照度及其均匀度显著提升,眩光值满足起重作业视觉环境条件。研究结果可为塔式起重机夜间起重作业照明方案设计提供科学依据。     

入渗条件下土壤中磷离子迁移的数值模拟

针对土壤非均质，边界条件复杂、土壤水分动态变化而且溶质与土壤存在吸持反应的情况，建立了土壤二维对流－弥散溶质迁移的有限元模型，编写了计算机模拟程序。作为模型的初步应用，对４种不同性质的土壤，ＫＨ２ＰＯ４溶液一维水平入渗条件下的迁移进行了数值模拟。结果表明，模拟结果能够很好地与室内土柱实验结果吻合，该模型可以用于研究伴有吸持情况下土壤溶质的迁移规律。另外模拟与实验结果均表明，对于象磷这种与土壤强吸附     

正确处理国土开发整治与防灾减灾的关系

正确处理国土开发整治与自然灾害防治的关系,可以避免不合理的国土开发整治导致自然灾害的发生和灾情的扩大,通过科学的国土开发整治促进防灾减灾,同时以灾害防治保障国土开发建设.为此,本文提出国土开发整治与灾害防治统一规划,同步实施,保证投资,合理运用,对区域规划和开发建设项目进行灾害影响评价等措施,实现二者相互促进,相互保障。