农村土地整理决策信息系统的构建

为从更高的宏观管理层次对农用地进行规划利用,给管理决策者提供一种客观科学的决策工具,以适应土地整理工作的未来发展.通过对国内外土地整理成功经验的总结分析,依据研究区现状及未来规划,借鉴已有的土地整理模式,结合GIS技术,建立了农村土地整理决策信息系统,并应用于具体区域.     

应用综合分析法优化大气环境监测布点

尝试应用聚类分析法距离-密切度优化楚雄市老建成区的大气环境监测布点,通过大气功能区划分,以及气象、空间等综合分析,提出新建城区大气环境监测布点, 在不增     

钢渣在污水治理中的应用

钢渣作为钢铁生产的主要固体废弃物,由于产生量大,成分复杂,直接排放将对环境造成严重影响,加强钢渣综合利用的研究对消除其环境污染具有积极的意义。本文通过总结近年来钢渣在污水治理方面的研究发展情况,为环境管理部门和环境保护工作者提供有益的参考。     

A CFD-based approach for gas detectors allocation

Accidental gas releases are detected by allocating sensors in optimal places to prevent escalation of the incident. Gas release effects are typically assessed based on calculating the dispersion from releasing points. In this work, a CFD-based approach is proposed to estimate gas dispersion and then to obtain optimal gas sensors allocation. The Ansys-Fluent commercial package is used to estimate concentrations in the open air by solving the governing equations of continuity, momentum, energy and species convection-diffusion combined with the realizable κ-ε model for turbulence viscosity effects. CFD dynamic simulations are carried out for potential gas leaks, assuming worst-case scenarios with F-stability and 2 m/s wind speed during a 4 min releasing period and considering 8 wind directions. The result is a scenario-based methodology to allocate gas sensors supported on fluid dynamics models. The three x–y–z geographical coordinates for the sensor allocation are included in this analysis. To highlight the methodology, a case study considers releases from a large container surrounded by different types of geometric units including sections with high obstacles, low obstacles, and no obstacles. A non-redundant set of perfect sensors are firstly allocated to cover completely the detection for all simulations releases. The benefits of redundant detection via a MooN voting arranging scheme is also discussed. Numerical results demonstrate the capabilities of CFD simulations for this application and highlight the dispersion effects through obstacles with different sizes.     

Analysis of Soil and Water Balance on the Land Arrangement Function

The natural supply of land resources is limited, but the economic supply may change along with social and economic development, and its size is decided bye nature and social and economic body conditions. When the supplying ability of land resources threatens the development of society and the conflict between people and land becomes tense, it forced people to im- prove land utilization and to increase the effective supply of land resources. The paper made an overall consideration on the characteristics of the irrigated farming and the frail ecological environment in Fuhai County, Altay Area, Xinjiang Uigur Autonomous Region and explored land arrangement planning as well as water resource planning and environmental protection. The paper evaluated natural resources, land utilization and water resource of the case study areas and focused on the spatio-temporal balance between the utilization of water and land resources. In the end the paper a feasible plan was made out for the land arrangement project.     

过滤吸附装置人字形布置公式浅谈

过滤吸附装置是有机废气过滤吸附箱的核心部件，其人（之）字形布置公式系根据工程实践总结出来的计算公式。本文介绍了活性炭纤维吸附装置布置公式的提出背景、推导过程和应用验证，以及采用本公式的优点。     

农牧交错地带的生态评估对土地整理的启示

开展农牧交错地带的生态评估,不仅能够保障区域内的粮食安全和生态安全,更能启示未来的土地整理工作。利用1986、1996和2000年的3期Landsat数据,应用转移矩阵、生态服务功能分析和景观格局分析等研究方法,对地处典型农牧交错带的镇赉县的土地利用变化、土地利用格局和功能进行研究,结果表明:耕地和草地是研究区域中最主要的土地利用类型;1986～1996年间土地整理工作的重点是耕地与未利用地之间的转变,1996～2000年间土地整理工作的重点是耕地与草地之间的转变。土地形态整理必然引起生态系统服务功能价值的变化,随着研究区域生态环境的退化,对于土地整理过程中不可控制单元(如湿地和水域)的微小变化,必然造成生态系统服务功能价值大幅变动。因此,系统维护与保育整个生态系统,实现整个区域的生态型土地整理,是今后土地整理工作的重点和难点。