Estimating posterior inference quality of the relational infinite latent feature model for overlapping community detection

Overlapping community detection has become a very hot research topic in recent decades, and a plethora of methods have been proposed. But, a common challenge in many existing overlapping community detection approaches is that the number of communities K must be predefinedmanually. We propose a flexible nonparametric Bayesian generative model for count-value networks, which can allow K to increase as more and more data are encountered instead of to be fixed in advance. The Indian buffet process was used to model the community assignment matrix Z, and an uncollapsed Gibbs sampler has been derived.However, as the community assignment matrix Z is a structured multi-variable parameter, how to summarize the posterior inference results and estimate the inference quality about Z, is still a considerable challenge in the literature. In this paper, a graph convolutional neural network based graph classifier was utilized to help to summarize the results and to estimate the inference quality about Z. We conduct extensive experiments on synthetic data and real data, and find that empirically, the traditional posterior summarization strategy is reliable.     

Eight-node conforming straight-side quadrilateral element with high-order completeness (QH8-C1)

A new eight-node conforming quadrilateral element with high-order completeness, denoted as QH8-C1, is proposed in this article. First, expressions for the interpolation displacement function satisfying the requirements for high-order completeness in the global coordinate system are constructed. Second, the displacement function expression in global coordinates is transformed into isoparametric coordinates, and the relationships between the two series of coefficients for the two kinds of displacement function expressions are found. Third, the displacement function expression is modified to satisfy the requirements of nodal freedom and interelement boundary continuity. The key to the new element construction is the derivation of the linear relationship expressions among 12 coefficients of element displacement interpolation polynomials in the global and isoparametric coordinate systems. As a result, the relationship between quadratic completeness and interelement continuity is explicitly given, and a proof of the completeness and the continuity was conducted to theoretically guarantee the validity of the derivation results. Furthermore, in order to verify the correctness of the theoretical work, nine numerical examples were performed. The computation results from these examples demonstrate that QH8-C1 exhibited excellent performance, including high simulation accuracy, fast convergence, insensitivity to mesh distortion, and monotonic convergence.     

基于熵权和灰色关联分析的评判方法优选油气田增产措施

采用基于熵权和灰关联分析的多因素综合评判方法对油气田增产措施进行优选,以熵权代替灰色关联分析中的权重,克服了人为赋值的主观性。文中首先对油气田增产措施的评价指标进行了分析,然后建立了相应的多因素综合评判理论模型,最后结合具体实例对该评判方法进行了检验。结果表明:该方法是切实可行的,具有很高的应用价值。     

多目标性能需求的C50混凝土配合比优化设计方法

针对工程用混凝土的多目标性能(工作性能、抗裂性能、力学性能和耐久性能)需求,提出了一种客观权重赋予-灰色关联度分析的混凝土配合比优化设计新方法.采用正交试验法研究了水胶比、砂率、胶凝材料总量、矿物掺和料用量和粉煤灰-矿粉质量比等因素对C50混凝土工作性能、抗裂性能、力学性能和耐久性能的影响,利用客观权重赋予技术确定了各项性能的客观权重,实现了C50高抗裂高性能混凝土配合比的优化设计,得到了最佳配合比,并结合试验数据验证了其综合性能.结果表明:客观权重赋予-灰色关联度分析方法可实现基于多目标性能需求的C50混凝土配合比优化设计,在一定试验条件下,C50高抗裂高性能混凝土最佳配合比参数为:水胶比0.30,砂率35%,胶凝材料总量420kg/m~3,矿物掺和料用量30%,粉煤灰与矿粉质量比2∶1.经验证,该配合比的混凝土满足多目标性能需求.     

基于FG-MCGDM的水利工程施工进度方案优化

针对水利工程施工进度的多准则群决策问题,提出了一种新的模糊灰色多准则决策模型。该模型基于模糊集理论、灰色关联分析和折衷解的理论方法,将各决策属性和决策者权重的语言变量转化为梯形模糊数;采用改进的 GRA-VIKOR方法对模糊信息群体决策问题进行求解,并对各决策者的群体效益值和个体遗憾值进行聚合;通过折衷解对施工进度方案进行排序,获得最优方案。该模型有效地避免了信息的扭曲和丢失,确保了决策信息的完备性。通过在某水利工程施工进度方案优选的案例分析与计算,证明了该模型的有效性和实用性。     

基于关系治理的EPC项目管理绩效影响因素研究

现阶段,EPC 模式在我国工程领域得到日益广泛应用。针对 EPC 模式下如何从业主与总承包商关系治理角度改善项目管理绩效的问题,采用结构方程模型,通过对 309 个 EPC 项目有关数据进行检验,以关系行为中“合作”作为中介变量,探讨并验证了关系治理多因素对项目管理绩效的影响程度和改善机理。研究表明,关系治理中信任、承诺、沟通和惯例4 个关键要素可有效促进双方合作,从而改善 EPC 项目管理绩效。进一步明确了 EPC 模式下“关系治理—合作—项目管理绩效”的关联路径。关系治理理论及方法在 EPC 项目中合理使用,将对我国工程领域大力推广 EPC 模式具有现实意义。     

电测式十字板剪切试验的研究与应用

十字板剪切试验能够明显地提高饱和软粘性土力学指标的准确度,适合沿海等软土分布地区,适用于求算地基承载力、软粘土的灵敏度等重要的地基力学参数。根据电测式十字板剪切试验的原理、标定方法,结合东营沿海软土分布区地基土的建筑经验进行系统地总结和归纳,提出了该地区十字板剪切试验指标应用的相应关系式。     

浅析建设工程施工合同中几个条款

对比FID IC施工合同条件,指出了我国建设工程施工合同示范文本中几个条款中的不足,并提出了改进的相应建议。改进后的合同更加完备,将有利于减少合同履行中纠纷的出现。     

建筑路径的关联化

当代城市中的建筑尺度越来越大,越来越多的城市功能被纳入建筑,建筑内的路径也越来越长,并且越显重要。然而,当今一部分建筑内的路径被处理为消极的纯交通体,忽视了对人性的关怀。本文提到的关联化是对这一现象的回应。希望通过对建筑内路径的分析研究,探讨如何在有条件的情况下将路径设计得更具人性。     

不同采收期水冬瓜叶的主成分分析及抗炎镇痛谱效关系研究

为筛选水冬瓜叶抗炎镇痛活性成分,采用高效液相色谱(HPLC)建立不同采收期10批次水冬瓜叶药材指纹图谱,对其进行主成分分析,并基于皮尔逊相关分析法探讨不同采收期水冬瓜叶药材抗炎镇痛的谱效关系。结果显示,不同采收期水冬瓜叶药材HPLC指纹图谱中有17个共有峰,10批次药材的相似度为0.875~0.973。聚类分析将不同采收期水冬瓜叶药材分为3类。主成分分析共得到3个主成分。经皮尔逊相关分析,峰17、峰14、峰12、峰15、峰13、峰5、峰16和峰4可能为水冬瓜叶药材镇痛作用的物质基础,峰6、峰8(异槲皮苷)、峰11、峰7(金丝桃苷)、峰5、峰3、峰4、峰13、峰9和峰1可能为水冬瓜叶药材抗炎作用的物质基础。