基于模糊系统与神经网络融合的故障诊断方法

提出一种基于模糊系统（ＦＳ）与神经网络（ＮＮ）融合的系统故障诊断方法。此法把模糊系统与神经网络融合在一起,通过神经网络的学习来生成和调整模糊系统的隶属函数,充分发挥各自优点,更有效地对系统出现的故障进行诊断。对系统进行了仿真,并得出了比较满意的结果。     

长江经济带区域经济差异分析

长江经济带是与沿海经济带并列的国家一级发展轴线,自20世纪90年代以来其内部区域经济差距日趋扩大,如何缩小差距以促进长江经济带整体和谐发展是摆在当前的重要任务。基于SPSS12.0统计分析软件和历年统计数据,分析长江经济带内部三大地区及41个地市之间的区域经济差异,找出产生区域差异的主要因素,然后对这些因素进行分析,以期在此基础上找到缩小区域差异、促进可持续发展的政策建议。最后对长江经济带内部各省市经济发展进行预测,分析长江经济带各省市发展的趋势。长江经济带内部差异显著,且有拉大趋势;发展前景良好,是国家重要的经济增长轴。     

战略环境评价中的战略缺陷分析

战略环境评价的目的是消除或降低因战略缺陷造成的环境影响,从战略决策源头控制环境问题的产生。战略缺陷将通过市场结构,企业行为改变而产生环境影响,是导致环境问题的根源。战略缺陷分析是战略环境评价的重点内容,是制定战略环境影响控制,减缓措施或战略替代方案的主要依据。分析了战略缺陷的两种类型：社会经济发展战略未充分考虑其环境影响以及环境与资源战略不符合社会经济实际。重点研究了导致战略缺陷产生的原因,即内部性,决策失误,低效率,权力分配不均及政府寻租行为。提出从战略内略内容失识,战略执行失真和战略组织失效3个维度进行战略缺陷分析的方法,最后结合长春经济技术开发区战略进行实例研究,发现该战略缺陷表现在环境与社会经济发展战略不对称,投资导向政策考虑当地资源及国家有关政策不充分,产业布局规划与开发建设行动不一致以及土地利用优惠政策导致的效率偏低4个方面,其造成了一定的社会的经济及环境影响。     

Eclogites with a short-lived granulite facies overprint in the Moldanubian Zone, Czech Republic: petrology, geochemistry and diffusion modelling of garnet zoning

The petrology and geochemistry of a newly discovered suite of high-pressure garnet + clinopyroxene-bearing rocks from the Monotonous Series of the Moldanubian Zone of the Bohemian Massif, southwest Czech Republic have been investigated. Three types [common eclogites, quartz ± kyanite ± (clino)zoisite eclogites and garnet-hornblende-clinopyroxenites] are distinguished by petrography and geochemistry. All underwent a significant degree of partial breakdown under granulite and amphibolite facies conditions during exhumation. Important features include the growth of orthopyroxene in breakdown domains after garnet and omphacite and anorthite + spinel ± corundum ± exceedingly peraluminous sapphirine replacing kyanite. Garnet zoning and inclusion patterns support a prograde evolution from low pressures for at least some of the samples. The post-eclogite stage granulite facies overprint indicates that high temperatures prevailed during exhumation, but preservation of zoning in some garnets and the results of diffusion modelling suggest that this overprint took place over a very short time-scale. The geochemical and petrological results allow characteristic differences to be recognized between these eclogites and metabasites found in other tectonic units of South Bohemia and consequently the assigning of all high-pressure rocks to a single, now disrupted, tectonic unit is a gross simplification that seriously misrepresents the tectono-metamorphic history of the region.     

机械故障振动信号征兆提取方法

在机械状态监测与故障诊断中，故障征兆的提取是关键环节，本文将介绍几种效果较好的故障征兆提取方法。     

时空交互视角下淮海经济区城乡融合发展水平演化

以淮海经济区为研究对象,界定城乡融合内涵,并构建多维指标体系,测度城乡融合发展水平,并探索时空演化特征及驱动机理。（1）在空间集聚方面,淮海经济区城乡融合发展水平集聚较为明显,并且集聚性整体呈现增强趋势。（2）在时空联动方面,具有相对动态的局部空间结构和相对稳定的空间依赖方向,同时空间格局演化方面具有较强的整合性;城市自身因素对城乡融合发展水平空间结构的改变影响较大,受相邻城市城乡融合发展水平的溢出效应的影响较小。（3）要素驱动模式方面,低分位驱动和高分位驱动城市的城乡融合发展水平变化受经济发展—城镇化驱动,低分位制约类型城市的城乡融合发展水平变化受城镇就业—政府行为制约,高分位制约类型城市的城乡融合发展水平变化受产业—政府行为制约。     

港口装卸作业的安全性分析

港口装卸的安全性对物流的畅通和港口企业的经济效益都有着举足轻重的作用 ,因此 ,港口装卸作业必须确保安全。而港口装卸作业涉及面广 ,研究港口装卸的安全性 ,仅仅考虑人—机系统是不够的。笔者在人机工程的基础上 ,提出了港口装卸作业特定的人—机—货—环系统 ,并就其主要影响因素、安全信息在系统中的作用以及系统的事故模型进行了理论分析。最后 ,利用事故树分析方法 ,对港口装卸事故产生的原因及其重要度进行了分析 ,为港口进一步采取安全措施提供了理论依据。     

Variation and evaluation of coastal salt marshes

Ten intertidal salt marshes along the Rhode Island coast were sampled and compared in terms of the relative standing crop and height of tallSpartina alterniflora, density of shoots, seed production and size, fish populations, and the abundance of grass shrimp, fiddler crabs, insects, and birds. The marshes ranged from 0.49 to 52.61 hectares (1.2 to 130 acres) and included fringe marsh in dense urban developments as well as unspoiled waterfowl preserves in rural isolation. Large variation in most parameters made it impossible to separate the sites with statistical significance using either univariate or multivariate techniques. Moreover, there was little meaningful intercorrelation among the parameters. Although more intensive sampling might make it possible to separate individual marshes with statistical rigor, these results suggest that the necessary effort may be too great to allow comparative field sampling to play a practical part in wetlands evaluation programs. The results also indicate that there is little, if any, correlation between visual esthetic perceptions of a marsh and its ecological characteristics. This work suggests that the development of ecological rating systems will not provide a reliable tool for the management of coastal wetlands.     

秦皇岛旅游生态环境功能分区及评价指标体系

本文根据秦皇岛旅游生态环境的特点,对秦皇岛旅游生态环境进行了功能分区,并提出了实现秦皇岛旅游可持续发展的旅游生态环境评价指标体系。     

环境规划中植物的景观功能及其应用

本文在探讨植物的景观特点及其建造功能和观赏功能等基础上，提出了环境规划中景观规划的基本原则。结合岳阳市南湖旅游度假区的实际情况，应用景观规划的基本原则，研究了该旅游度假区的面上绿化规划和景区景点绿化规划。