模糊集重心理论在隧道瓦斯突出评价中的应用

以隧道瓦斯突出评价为研究对象。选取地质构造、煤层厚度、隧道埋深、瓦斯含量、瓦斯压力、瓦斯放散初速度和煤的坚固性系数作为指标,建立隧道瓦斯突出评价标准;用关联函数确定指标权重;结合模糊集重心理论与最短距离识别准则,构建属性识别模型,对隧道瓦斯突出进行评价。评价结果与可拓评价结果一致,从而验证了该方法的实用性。研究表明,基于模糊集重心理论的属性识别模型用于隧道瓦斯突出评价是可行的,为隧道瓦斯突出评价提供了一种新方法。     

Multiple attribute evaluation of landscape management

Economic approaches to the valuation of ecological services have several limitations. Some of these limitations can be overcome using the multiple attribute decision-making model developed in this paper. The model postulates that a private or public decision-maker selects a site/landscape management plan based on the biophysical and economic attributes of alternative management plans, the decision-maker’s preferences for attributes, and constraints on the selection of a management plan.Two cases are examined. Case A is a watershed consisting of publicly owned land that is managed at the site, management unit and landscape scales. Management is based on the philosophy of ecosystem management. Case B is a watershed composed of several privately owned units that are managed at the site scale by decision-makers whose primary motivation is economic profit. The preferred management plan in both cases is determined using a two-stage procedure. The first stage uses a stochastic programming model to identify the most efficient management plans for a site/landscape. The second stage determines which efficient management plan for a site/landscape is preferred by maximizing an expected utility function that is additive in the attributes and assumes that the decision-maker is risk neutral.Whether a land-management plan results in strongly or weakly sustainable resource conditions is evaluated. Strong sustainability requires the probability of exceeding the minimum acceptable value of an attribute to be greater than or equal to a pre-determined reliability level for each attribute. Weak sustainability requires the same condition except that it applies to a composite index of the attributes rather than each attribute. Bayes theorem is used to evaluate uncertainty about whether the state of a landscape is sustainable.     

基于熵权的属性识别模型在湖泊水质富营养化评价中的应用

针对模糊评价中对多因子赋权时因计算繁琐,工作量大,未考虑多个评价对象间联系等缺陷,提出利用熵权法对多评价因子赋权的新思路,建立了基于熵权的属性识别模型,并用此模型对福州市山仔水库的水质进行评价,比较了利用熵权法与传统的评价因子赋权的差异。此模型为湖泊水质的富营养化评价提供一种简便实用的评价方法。     

Neighborhood satisfaction,physical and perceived naturalness and openness

This study examined neighborhood satisfaction in relation to naturalness and openness. It used Geographic Information System (GIS) and Landsat satellite imagery to physically measure the environmental attributes. Through path analysis it examined the relationship among the attributes, resident ratings of those environmental attributes, their satisfaction with them, and their overall neighborhood satisfaction (n = 725). We expected overall neighborhood satisfaction to relate to the resident's ratings of the environmental attributes and to the physical measures of them. The path model showed that overall neighborhood satisfaction was associated directly with the physical measure of building density and indirectly with the physical measure of vegetation rate through perception and evaluation of them. The perceptions and evaluations of the attributes related to one another. With refinements, GIS and Landsat data geo-related to survey data can offer a powerful tool for understanding the complex nature of neighborhood satisfaction and behavior.     

基于IIAHP-Entropy-ssd的采空区遗煤自燃危险性评价模型及应用

为了能够对煤矿采空区遗煤自燃危险性进行准确判定,提出基于IIAHP-Entropy-ssd最优综合赋权模糊评价模型。首先,结合影响采空区遗煤的自燃性及环境影响因素,建立危险性评价指标体系,并确定各评价指标的分级准则;其次,利用区间数代替数值评价打分,并运用可能度互补矩阵进行修正的改进区间数层次分析法（IIAHP）,结合熵权法（Entropy）,根据现场实测数据,得出各评价指标的主、客观权重,并运用离差平方和（ssd）的最大化思想进行最优综合赋权,克服评价过程中主、客观因素对评价结果的影响,运用属性数学理论,建立各评价指标的隶属函数;最后,运用该模型对忻州窑矿8914综放工作面采空区遗煤自燃危险性进行评价,并与现场实际情况进行对比,结果表明:该模型的评价结果与实际情况基本一致,验证了该评价模型的准确性,为采空区遗煤自燃危险性评价提供参考和借鉴思路。     

属性识别理论模型二级评判法在城市总体环境质量评价中的运用

属性识别理论模型是近年来提出的一种数学模型，它已成功地用于质量评价中。现将该模型引用到城市总体环境质量评价中，提出运用二级评判来综合评价城市总体环境质量。经实例分析表明，属性识别理论模型用于城市总体环境质量评价比模糊综合二级评判法更合理实用，为城市总体环境质量综合评价提供了一种新方法。     

属性识别法在郑州市空气质量评价中的应用研究

阐述了评价环境空气质量的属性识别法,介绍了属性识别理论模型和属性权重的确定,通过将熵值法与属性识别理论相结合,建立了基于熵权的属性识别理论模型,并依据《环境空气质量标准》(GB 3095-2012),对郑州市城区2009年至2013年的环境空气质量进行了综合评价.结果表明:2009年至2013年郑州市城区的环境空气质量均为Ⅱ级.属性识别理论概念清晰,计算简单,评价结果比较客观.评价结果表明运用属性识别理论应用于环境空气质量综合评价是合理可信的.     

基于属性理论的长株潭城市群生态系统健康评价

城市生态系统是一种高度人工化的自然-社会-经济复合生态系统,其健康状况直接影响到城市的可持续发展。针对城市生态系统健康评价标准的不确定性问题,在构建评价指标体系的基础上,提出了基于属性理论的城市生态系统健康评价模型及评价方法。以长株潭城市群为研究区域,运用该模型和方法对其生态系统健康进行了综合评价。评价结果表明：长株潭城市群的生态系统现状属于一般健康类,其中自然生态子系统对区域整体健康状况有较大影响,评价结果与实际情况大体吻合。通过对各子系统层的健康度分析,识别了健康限制因素,并提出了相应的调控措施。采用属性理论方法开展城市生态系统健康评价,能较好地识别系统层综合健康状况和子系统层的健康状况,具有一定的实用价值,其评价结果为促进城市生态建设,有效实施生态系统健康管理提供了科学依据。     

无线火灾传感网络故障诊断在工业建筑的应用

本文使用粗糙集中一种改进的基于差别矩阵和属性选择的属性约简算法,对故障样本数据进行约简,得到最小约简集,结合使用新旧版本的BP神经网络,对工业建筑节点故障进行检测,仿真实验结果得到采用RS-new BP神经网络比old BP神经网络的迭代次数减少了61次,正确率提高了7.11%。     

Have a correct understanding of the attribute of geologicenvironment give full play to the role ofgeoscience in environmental protection

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