空气信息综合管理评估系统

近年来, 重工业的快速发展加剧了空气质量下降, 环境治理变得尤为重要. 然而, 在国内外现有的空气质量评估系统大多形式单一、准确度低、评估范围有限, 并不能较精确的以多样化的形式展示空气质量情况. 本文设计实现了一套集数据收集、标准化处理及空气质量评估为一体的空气质量评估系统. 该系统采用网络爬虫从空气质量监测网站获取数据, 并对数据进行抽取、清洗、单位转化、污染物分类及多种标准化方法处理, 提高空气质量的评估精确度. 系统评估方式多样, 有按时、日、月、监测站位置及污染物种类等, 解决了大多数空气质量评估系统形式单一和评估不准确的问题. 该系统可以为用户提供实时的空气质量情况, 还可以为大气污染相关科研人员提供准确的数据预处理结果. 系统运行稳定可靠, 界面友好, 功能丰富, 能满足空气信息综合管理评估的需求.     

Predictive association of metal–organic systems in the solid-state: the molecular electrostatic potential based approach

Designing crystalline solids with improved properties or performances remains a challenging task, despite great strides that have been made within the field of crystal engineering since its birth several decades ago. Herein, we are bringing examples that illustrate recent successes in taking supramolecular synthetic guidelines from the organic crystal engineering and adjusting those to metal-containing systems, particularly to the lower-dimensional ones. The versatility of calculated molecular electrostatic potential (MEP) as a new crystal engineering tool is demonstrated.     

Recovery of phosphate ores in the modified three-product column (3PC) flotation cell

This work details the results obtained for the rougher flotation of phosphates in a modified flotation cell known as a three-product column (3PC), at both the laboratory and pilot plant scales. Results were compared to a conventional column cell-CCC. The 3PC cell separates the drained (rejected) particles from the froth zone (third product) and uses a secondary wash water system between the feed and the froth zone (II). Bench-scale studies measured the effect of the two water surface rates on mass and metallurgical recoveries and concentrate grades (P₂O₅, Fe₂O₃, and SiO₂) in all the flows. At pilot scale, the influence of wash water (J_W2) and column design on the flotation separation parameters was studied. Results showed that, compared with the conventional column cell (CCC), the 3PC yielded, in all cases, clean high-grade concentrates, with a minor concentration of impurities (Fe₂O₃ and SiO₂). Concentrate recoveries ranged from 40% to 70% for apatite and were lower when compared to CCC, but it is believed that the third product could be recycled to the fee. This drop-back product operating with J_W2 = 0.0 cm s⁻¹ might yield 5–10% extra in apatite recoveries and enhancing this J_W2 values, the apatite recovery decreased by 0.5–3% but rejection of impurities was very high. Results appear to show that the 3PC may be used as a rougher-flash or Cleaner unit with an optional recycle of the third product into the rougher or simply discarding it. Data on the influence of some cell design and gas dispersion parameters on process efficiency are reported, and the potential practical applications for this type of cell are envisaged.     

基于改进GSO的裂解炉原料切换策略研究(英文)

The scheduling process of cracking furnace feedstock is important in an ethylene plant. In this paper it is described as a constraint optimization problem. The constraints consist of the cycle of operation, maximum tube metal temperature, process time of each feedstock, and flow rate. A modified group search optimizer is pro-posed to deal with the optimization problem. Double fitness values are defined for every group. First, the factor of penalty function should be changed adaptively by the ratio of feasible and general solutions. Second, the“excel-lent”infeasible solution should be retained to guide the search. Some benchmark functions are used to evaluate the new algorithm. Final y, the proposed algorithm is used to optimize the scheduling process of cracking furnace feedstock. And the optimizing result is obtained.     

科学、价值与判断在环境影响评估架构中之整合

公共政策研拟,尤其是环境影响评估,不仅牵涉技术性科学层面,同时涵盖社会性价值评估与政策性决策判断。旨在探讨如何将科学、价值与判断等因素合理融合于环境影响评估作业过程中,并据此研拟一环境影响评估架构,作为中国台湾地区环保部门开发案审核依据之参考。本文所研拟之环境影响评估架构的理论基础包括社会选择理论、社会判断理论及多属性评估方法。通过社会选择理论分析环境政策制定的机制;通过社会判断理论解释科学与价值如何整合于政策制定及其可行性中;而通过多属性评估方法建立开发案评选的集体决策技术。以山坡地开发为例说明此架构在实践中的应用。     

台州古塔的建筑特色与人文价值

在对台州现存的22座古塔作初步调查的基础上，就古塔的外观造型、内部结构、建筑思想及其文化内涵、艺术价值等方面作出分析，并对保护和利用提出建议。     

砂土地震液化的模糊综合评判法

根据砂土液化问题具有的模糊性和不确定性，建立了一种判别砂土液化发生可能性的模糊综合评判模型。在提出的砂土液化模糊综合评判模型中，通过综合地震烈度、标贯击数、地下水位和平均粒径等影响砂土地震液化的因素，采用梯形隶属函数并分别给出各因素隶属函数的表达式。通过工程实例计算验证了该模型的可行性，计算过程简单明了，有一定的实用价值。