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1.
依据循环经济项目的定量评估系统,选取13项公共指标及2项选评指标,对厦门市狐尾山污水林地生态处理工程项目进行示范性评估.根据循环经济的特点,该项目属于减排型和循环再利用型.即能达到污水零排放和污水100%的循环再利用,削减进入厦门海域的污水排放量,有利于裸露山体绿化改造,还能产生一定的经济效益.对所选择的指标进行打分和评估,并使用加权平均法,计算狐尾山污水处理生态工程循环经济综合评价值,该工程的综合评价值为89.6分,表明项目具有较高的循环经济示范性,发展潜力大.  相似文献   

2.
城市循环经济发展水平评价实证研究   总被引:2,自引:0,他引:2  
定量地测度循环经济发展水平,是当今循环经济研究的方向之一,也是制定循环经济发展对策的主要依据.在综述了国内外循环经济指标体系构建和定量评价的基础上,依据3R原则、整体性原则、区域性原则、可比性原则、可操作性原则等5大原则,采用层次分析法,构建了城市循环经济发展水平评价的指标体系,该指标体系由目标层、控制层、指标层3个层次,经济系统、资源系统、环境系统、再利用系统4个系统,15个指标构成.提出了城市循环经济发展水平的评价模型,采用2种原始数据的标准化处理方法,并分别对2003年~2007年江西省抚州市循环经济的发展水平进行了综合评价,2种方法虽然有差异,但得出的综合评价结果总的发展趋势是相同的.  相似文献   

3.
装备制造企业绿色度评估的测评指标建立与权重分配是评估的关键问题,基于已经设计出的装备制造业绿色度评估指标体系和综合评价数学模型,研发了评估系统维护和权重录入计算系统软件,设计了定性与定量相结合的权重模糊录入与计算方法,供决策者们实时调整测评指标数目、修改指标名称、调整权重级差,能够适应不同类型企业的要求.设计了评估技术...  相似文献   

4.
循环经济是21世纪国际社会推进可持续发展新的实践模式。建立循环经济评价指标体系是循环经济研究的重要内容。从确定指标权重以及指标基准值的角度入手,探讨了循环经济评价指标体系的设计原则、构建思路;给出了铝工业企业清洁生产评价指标的考核评分的计算方法,得出了铝行业企业的生产系统评价指数、企业综合评价指数;构建了电解铝行业循环经济的评价指标体系,并详细分析每个指标,为铝行业发展循环经济提供了参考依据和理论借鉴。  相似文献   

5.
隧道施工风险人-机-环境系统综合评估   总被引:1,自引:0,他引:1  
借鉴人机工程学原理,对隧道施工风险的多指标人机环境系统综合评估进行探讨.在分析人子系统、机子系统和环境子系统各自内涵的基础上,结合相关规范、专家法和隧道实际施工技术,构建开放式的评价指标体系,即指标数目可根据具体隧道增加或减少,确立评估流程—首先考虑学术背景、职称和从事专业时间等因素量化专家自身的权重,根据专家法确定指标层的值,在熵度法计算指标层权重、层次分析法和专家法计算准则层权重的基础上,评估指标层风险、各子系统风险和人机环境系统的综合风险.将该模型应用到某隧道施工风险评价中,根据评估值提出了具体的改善措施,结果表明该模型是合理可行的.  相似文献   

6.
对无人机协同作战进行效能评估能够有效分析系统性能好坏,对提升系统作战能力有积极意义。针对无人机作战编队,使用DoDAF构建无人协同作战体系框架,分析作战活动与能力之间的关系,建立协同作战能力指标体系;对于不同类型的指标进行差异化处理,分别采用尺度标度法、概率计算法与聚合法处理量纲类指标、定量型概率类指标与定性型概率类指标;使用ADC模型,扩展系统能力向量,将生存能力、电子对抗能力等综合性指标考虑在内,突破单项指标的局限性;最后以对地作战典型任务下的无人机协同作战为场景,使用该方法对不同作战方案进行效能评估,计算结果验证了该方法的有效性。  相似文献   

7.
建立高职院校内涵建设评估指标体系,该体系涉及人才培养、办学条件、师资队伍建设、科研水平和社会服务五个方面,共21个指标.选取了福建省11所示范性高职院校作为评估样本,采用灰色系统理论中的灰色关联度分析,对其内涵建设相关指标进行关联度测算,得到11所院校内涵建设的排名情况,再应用模糊聚类分析进行动态分类,绘出不同置信水平λ下11所高职院校内涵建设情况的动态聚类谱系图,最后对评估结果进行分析.  相似文献   

8.
针对在线评测系统中缺少对学习者编程能力的客观反馈和评估指标权重难以确定的问题,建立遗传算法(genetic al-gorithm,GA)优化反向传播(back propagation,BP)(GA-BP)神经网络的编程能力评估模型.通过对在线评测系统的数据进行挖掘,提取编程能力评估指标,采用双参数平衡熵权法和离差最大化法的客观组合赋权方法确定指标权重以及编程能力评估值,将评估值作为GA-BP神经网络的期望输出,并与单一BP神经网络确定的编程能力评估结果进行比较.研究结果表明,利用该模型能够实现对学习者编程能力的评估且评估结果更准确.  相似文献   

9.
针对精准扶贫绩效评估这一实际问题,先构建了评估指标体系,在各指标属性值为模糊数直觉模糊数的的情况下,定义了模糊数直觉模糊数得分函数,然后利用熵权法确定各指标权重,再根据模糊综合评估值对各扶贫地区进行绩效得分排序,最后通过数值算例对该评估方法的计算过程及有效性进行了说明.  相似文献   

10.
随机森林在企业信用评估指标体系确定中的应用   总被引:3,自引:0,他引:3  
评估指标体系的确定是企业信用评估的一个关键环节,指标体系选取的好坏直接影响模型的预测准确率.本文引进组合学习算法的新方法随机森林(Random Forest,RF)来选择指标,使得到的指标体系更加客观,更加符合机器学习的特点.实验证明,该方法确定的指标体系能更有效地体现企业的信用状况,使用该指标体系建立的随机森林评估模型具有更高的预测准确率.  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

15.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

16.
以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.  相似文献   

17.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

18.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

19.
Quality traits in wheat (Triticum aestirum L.) were studied by quantitative trait locus (QTL) analysis in a recombinant inbred line (RIL) population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross (ChSh). Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.  相似文献   

20.
赵英华 《科技信息》2008,(12):219-220
0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation's behavior in their social life throughout the long history is beyond list.  相似文献   

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