上海地区成年女性批量定制服装号型分类研究

为确定批量定制服装合理板型数及提高合体度,以上海地区520名成年女性为研究对象,选择身高、胸围、腰围、领围为变量,提出了基于K-means聚类分析的非国标规格的号型分类方法。探讨了初始聚心的选择和最佳聚类数的确定,并以Calinski-Harabasz(CH)指标、变异系数和相对偏差为指标,对聚类效果进行评价。研究表明:以国标号型规格为初始聚心,号型被分为30类;相同CH指标时,以非国标规格号型为初始聚心,号型被分为20类,即板型数减少,且变异系数和相对偏差明显降低。     

基于改进DEC的评论文本聚类算法

针对原始深度嵌入聚类(DEC)算法中聚类层得出的初始聚类数目和聚类中心有很强的随机性,从而影响DEC算法效果的问题,提出一种基于改进DEC的评论文本聚类算法,对无类别标注的电商评论数据进行无监督聚类.首先获得融合句子嵌入向量和主题分布向量的BERT-LDA数据集向量化表示;然后改进DEC算法,通过自动编码器进行降维处理,在编码器后堆叠聚类层,其中聚类层的聚类数目基于主题连贯性选择,同时使用主题特征向量作为自定义聚类中心,再进行编码器和聚类层的联合训练以提高聚类的准确度;最后利用可视化工具直观展示聚类效果.为验证算法的有效性,将该算法与6个对比算法在无标注的产品评论数据集上进行无监督聚类训练,结果表明,该算法在轮廓系数和Calinski-Harabaz(CH)指标上取得了0.213 5和2 958.18的最佳效果,说明其可有效处理电商评论数据,反映用户对产品的关注情况.     

一种基于主题的Web文本聚类算法

设计了一种基于主题的Web文本聚类方法(HTBC):首先根据文本的标题和正文提取文本的主题词向量,然后通过训练文本集生成词聚类,并将每个主题词向量归类到其应属的词类,再将同属于一个词类的主题词向量对应的文本归并到用对应词类的名字代表的类,从而达到聚类的目的.算法分四个步骤:预处理、建立主题向量、生成词聚类和主题聚类.同时,对HTBC与STC、AHC、KMC算法从聚类的准确率和召回率上做了比较,实验结果表明,HTBC算法的准确率较STC、AHC和KMC算法要好.     

匾额文化初解

匾额是附着于中国传统建筑的一种特殊文化符号,它具有十分重要的作用,但至今缺乏整体研究.本文主要从匾额的内涵、匾额的功能、匾额的价值三个方面予以解读,认为匾额具有丰富的文化内涵,集中表现了我国古代文化的价值观和审美观.     

流砂画制作技术

流砂画又称流动山水画、魔镜,是一种立体动态风景框画匾,它以力学、美学、流体理论为指导,利用气、液、固三态物质为素材,通过两种矿砂和几种化工原料配合制作而成。由于镜内三态物质的相互作用和位置交换,使砂体自然流动形成不断变化、千姿百态的各种神奇图案,将大自然的宏伟景观展现于眼前,妙趣横生,令人心旷神怡。该画不失为一种高雅的新潮工艺品。     

大城市边缘区城镇化区位特征和发展阶段研究

基于系统聚类、空间聚类NDBI指数和监督分类分析方法,分析全中国省会城市、副省级城市和计划单列市的城市边缘区城镇化区位特征和发展阶段.研究表明:以距离大城市政府中心距离为衡量标准,研究样本区位特征可以划分为延续型(近距离)城市边缘区、毗连型(中等距离)城市边缘区以及飞地型(远距离)3种类型,3种不同类型所对应的指标存在明显的空间类型差异.在边缘区城镇化发展阶段可以划分为初期发展阶段、中期发展阶段和后期发展阶段三大类,以及中期发展阶段中的7个亚类,与其对应的人口密度和开发强度存在较大的空间差异.产业园区的发展、人口集聚的加速以及生活设施的不断完善在大城市边缘区城镇化发展过程中体现的不同区位特征和发展阶段特征方面发挥着重要的作用.     

三种典型聚类算法在职员评定中的应用

通过利用三种典型算法:Q-型模糊聚类算法、K-means算法及K-medians算法,对公司职员的年终评定进行应用分析,得到了不同的聚类结果,通过对结果的分析比较、探讨,得出结论:针对不同问题,应结合实际,有针对性地用不同算法更适合.并在此基础上,对聚类算法的聚类过程、本文后续工作进行了探讨总结.     

基于改进灰色聚类法的大气环境质量综合评价

针对灰色聚类法在环境质量评价中的不足,对其白化函数与权重确定方法进行了改进.指数型白化函数建立了样本值与各等级之间的对应关系,避免了零权重问题,修正聚类权法体现了各污染物在同一灰类之间的变化幅度.应用改进后的灰色聚类模型对福州市2004—2008年的环境空气质量进行评价.结果表明:改进后的灰色聚类法评价结果更为客观、准确.     

基于POE的寒区平原型农业小城道路节点景观评价 ——以黑龙江省绥化市为例

以寒区平原型农业小城绥化市为例,利用调查问卷法获得数据,通过使用后评价法(POE)调研和信息反馈构建评价指标体系,运用SD语义差异法、IPA图像分析法和系统聚类分析法对数据进行统计分析.结果表明:市民对绥化市道路节点景观的生态和设施功能较满意,但其艺术功能还需要进一步完善;27个道路节点景观分为生态型、文化型、生活型和...     

基于半监督学习的中文多文档子主题划分

为了能在多文档自动摘要过程中更好地划分子主题,提出了一种基于半监督学习的子主题划分方法:首先计算句子的语义相似度;然后通过层次聚类对可信度高的句子进行主题类别标记,生成少量已标记主题类别的句子集,在此基础上对所有句子进行constrained-k-means聚类,通过交叉验证的方法确定子主题的数目k;最后使用k-means聚类获得多文档的各个子主题.实验结果表明,该方法有效地提高了子主题的识别率.     

Markedness and its Interpretation in Language Use

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

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.     

低渗透非均质砂岩油藏启动压力梯度研究

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。     

On Tragic Consciousness In The Works By Ernest Hemingway

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with