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基于差分隐私度序列的Thurstone模型中参数估计量的渐近性理论 被引量:1
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作者 胡军浩 马晓慧 罗敬 《中南民族大学学报(自然科学版)》 CAS 北大核心 2022年第5期623-629,共7页
Thurstone模型主要用于研究成对数据比较问题的统计模型,该模型在心理测量、社交选择、推荐系统等方面有着广泛的应用.然而,由于心理学研究中常常获取包含着个人隐私的数据,直接将数据发布进行分析会带来隐私泄露的风险.为解决数据隐私... Thurstone模型主要用于研究成对数据比较问题的统计模型,该模型在心理测量、社交选择、推荐系统等方面有着广泛的应用.然而,由于心理学研究中常常获取包含着个人隐私的数据,直接将数据发布进行分析会带来隐私泄露的风险.为解决数据隐私泄露问题,通过对原始数据加入离散Laplace噪声进行加密,然后利用数理统计方法建立了带有噪声的Thurstone模型参数的渐近性理论.最后通过数值模拟验证了理论结果. 展开更多
关键词 thurstone模型 相合性 渐近正态性 差分隐私
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基于Thurstone因子分析的我国高新区绩效评价研究 被引量:3
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作者 徐嘉祺 贾金荣 《求索》 CSSCI 2013年第11期9-11,共3页
本文以Thurstone因子分析为研究工具,对全国29个省级地区的高新区绩效进行评价,实证测算显示:科研与经济因素是影响我国高新区绩效的决定性因素,我国高新区均存在不同程度的科研和经济发展不均衡,高新区科研和经济发展不均衡对其综合发... 本文以Thurstone因子分析为研究工具,对全国29个省级地区的高新区绩效进行评价,实证测算显示:科研与经济因素是影响我国高新区绩效的决定性因素,我国高新区均存在不同程度的科研和经济发展不均衡,高新区科研和经济发展不均衡对其综合发展水平存在显著影响。研究进一步显示,我国近半高新区存在科研和经济发展水平的双落后。根据研究结论,本文有针对性地为不同情况的高新区制定了相应发展策略,以求为高新区政府相关政策的制定提供理论依据和实证材料。 展开更多
关键词 thurstone因子分析 高新区绩效评价 Bartlett球形检验
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基于Thurstone因子分析的我国旅游业绩效评价研究
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作者 周俊俊 《旅游纵览(下半月)》 2019年第1期177-179,共3页
本文以Thurstone因子分析为研究工具,对全国31个省(市)地区旅游业经济绩效进行评价,实证测算结果显示:旅游经济支撑因素和旅游经济发展因素在我国旅游业经济绩效中占据主导性地位,我国部分地区旅游业存在旅游经济支撑和旅游经济发展不... 本文以Thurstone因子分析为研究工具,对全国31个省(市)地区旅游业经济绩效进行评价,实证测算结果显示:旅游经济支撑因素和旅游经济发展因素在我国旅游业经济绩效中占据主导性地位,我国部分地区旅游业存在旅游经济支撑和旅游经济发展不平衡的问题,这种不平衡对旅游业综合发展水平存在显著影响。研究进一步显示:部分地区旅游业存在旅游经济支撑和旅游经济发展水平的双落后现象。依据研究结论,本文有针对性地为不同情况、不同地区的旅游业发展制定相应策略,以期为政府旅游相关政策的制定提供理论依据和实证材料。 展开更多
关键词 旅游业 thurstone 因子分析 旅游经济发展 公因子 旅游从业人员 国际旅游收入
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新疆学业水平质量监测汉语试卷的纵向量表化实证研究
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作者 袁硕 彭恒利 《中国考试》 2014年第7期3-9,共7页
作为一种典型的增长模型,纵向量表化(Vertical Scaling,也称垂直等值、垂直标定等)方法常用于评估被试的学业或能力发展状况。本研究以新疆少数民族四至六年级学生在2011年至2013年三次学业水平质量监测汉语考试中的答题数据为样本,采... 作为一种典型的增长模型,纵向量表化(Vertical Scaling,也称垂直等值、垂直标定等)方法常用于评估被试的学业或能力发展状况。本研究以新疆少数民族四至六年级学生在2011年至2013年三次学业水平质量监测汉语考试中的答题数据为样本,采取共同题设计进行数据收集,并运用Thurstone方法和IRT同时标定的方法进行量表分数构建,最终完成了三个年级间的分数连接,实现了对新疆双语班四至六年级学生汉语学业水平增长的测量,为学业水平监测工作提供了可参考的量化指标。 展开更多
关键词 纵向量表化 thurstone方法 IRT同时标定 学业质量监测
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Empirical Research on Tourists' After-trip Perception of Landscape Preference in the Confucius Temple in Nanjing City
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作者 ZHOU Wei HUANG Zhenfang +1 位作者 GUO Wen WU Liming 《Journal of Landscape Research》 2013年第6期19-24,共6页
Thurstone’s Comparative Judgment Model was applied to measure characteristics of tourists’after-trip perception of landscape preference in the Confucius Temple,a famous historical block in Nanjing City.The results s... Thurstone’s Comparative Judgment Model was applied to measure characteristics of tourists’after-trip perception of landscape preference in the Confucius Temple,a famous historical block in Nanjing City.The results show that(a)as time goes by,the tourists’time perception differentiation has continuously sublimated from the general experience into the peak experience,and gradually evolved into the core experience element in the overall perception.In terms of content,perceptional contents of tourists decrease in sequence of the Confucian culture,the commercial culture and the culture of refined scholars.As a whole,tourists’after-trip perception differentiation has 3 sections:halo zone,sub-halo zone,and gray zone.(b)Because of tourism development,the Confucian culture is influenced by other cultures,and the commercial culture shows the trend of"over-generalization",and the culture of refined scholars has weakening carriers and modes of inheritance.Inheritance of its unique cultural connotations deserves increasing attention. 展开更多
关键词 Historical and cultural block After-trip tourist PERCEPTION thurstone’s Comparative Judgment Model(TCJM) the CONFUCIUS TEMPLE of Nanjing
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Skin Sensitive Difference of Human Body Sections under Clothing — Comparative Judging of Body Sections' Cold Sensitivity Sequence
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作者 李俊 王云仪 吴海燕 《Journal of Donghua University(English Edition)》 EI CAS 2005年第2期26-29,共4页
Skin seasitive difference of human body sections under clothing is the theoretic foundation of thermal insulation clothing design. By a new psychological & physical researching method, the subjective psychological pe... Skin seasitive difference of human body sections under clothing is the theoretic foundation of thermal insulation clothing design. By a new psychological & physical researching method, the subjective psychological perception of human body sections affected by the same cold stimulus are studied, and with Thurstone comparative judgement the main human body sections' cold sensitivity sequences are obtained. Furthermore the physiological causes for skin sensitive difference of human body sections under clothing are suggested. 展开更多
关键词 clothing comfort skin surface temperature cold sensitivity thurstone comparative judgement
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Thurston拟度量的非对称性(英文)
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作者 刘立新 《中山大学学报(自然科学版)》 CAS CSCD 北大核心 2000年第6期6-9,共4页
证明了在Teichm¨uller空间中 ,长度谱度量不拟等距于Thurston拟度量 ,证明了Thurston拟度量的非对称性 ,刻划了Thurston拟度量不对称的程度 .
关键词 长度谱 极值长度 Thurston拟度量 非对称性
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有理函数的不变图(英文)
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作者 蔡宏坚 《中国科学技术大学学报》 CAS CSCD 北大核心 2015年第3期173-185,共13页
研究了有理函数的不变图问题.主要证明了,如果f是临界有限有理函数,其post-critical集合由一个超吸性不动点以及两个Julia集中的点组成,并且Julia集为Sierpinski曲线,那么对于充分大的k,均存在一个包含post-critical集合的fk不变图.
关键词 有理函数 临界有限 不变图 Thurston映射
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具有相容辛结构的四维Thurston几何(英文)
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作者 黄红 《南开大学学报(自然科学版)》 CAS CSCD 北大核心 2005年第5期70-73,共4页
证明在11种不具有相容K ah ler结构的四维T hurston几何中只有N il3×E1,N il4和So l3×E1有相容辛结构.作为推论重新得到一些非K ah ler或非复辛流形的例子.
关键词 4维流形 Thurston几何 辛结构
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关于Teichuller度量与Thurston 拟度量的非拟等距性
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作者 刘立新 《数学年刊(A辑)》 CSCD 北大核心 1999年第1期67-70,共4页
本文证明了在 Teichmuller空间中, Thurston拟度量不拟等距于Teichmuller度量.
关键词 黎曼曲面 T度量 非拟等距性 Thurston拟度量
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关于Teichmüller空间中的长度谱度量
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作者 刘立新 《数学年刊(A辑)》 CSCD 北大核心 2001年第1期19-26,共8页
本文证明了在Teichmüller空间T(g,m,n)中,Thurston拟度量拓扑等价于Teichmüller度量.
关键词 黎曼曲面 长度谱 极值长度 Thurston拟定量 Teichumeller变量 Teichmueller空间 拓扑等价 拟共形映射
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An Alternative Manifold for Cosmology Using Seifert Fibered and Hyperbolic Spaces
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作者 Maria E.Mejía Reinaldo R.Rosa 《Applied Mathematics》 2014年第6期1013-1028,共16页
We propose a model with 3-dimensional spatial sections, constructed from hyperbolic cusp space glued to Seifert manifolds which are in this case homology spheres. The topological part of this research is based on Thur... We propose a model with 3-dimensional spatial sections, constructed from hyperbolic cusp space glued to Seifert manifolds which are in this case homology spheres. The topological part of this research is based on Thurston’s conjecture which states that any 3-dimensional manifold has a canonical decomposition into parts, each of which has a particular geometric structure. In our case, each part is either a Seifert fibered or a cusp hyperbolic space. In our construction we remove tubular neighbourhoods of singular orbits in areas of Seifert fibered manifolds using a splice operation and replace each with a cusp hyperbolic space. We thus achieve elimination of all singularities, which appear in the standard-like cosmological models, replacing them by “a torus to infinity”. From this construction, we propose an alternative manifold for cosmology with finite volume and without Friedmann-like singularities. This manifold was used for calculating coupling constants. Obtaining in this way a theoretical explanation for fundamental forces is at least in the sense of the hierarchy. 展开更多
关键词 TOPOLOGY COSMOLOGY Thurston’s Theory Singularity-Free
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Local rigidity of the Teichmüller space with the Thurston metric
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作者 Huiping Pan 《Science China Mathematics》 SCIE CSCD 2023年第8期1751-1766,共16页
We show that every R-linear surjective isometry between the cotangent spaces to the Teichmüller space equipped with the Thurston norm is induced by some isometry between the underlying hyperbolic surfaces.This is... We show that every R-linear surjective isometry between the cotangent spaces to the Teichmüller space equipped with the Thurston norm is induced by some isometry between the underlying hyperbolic surfaces.This is an analogue of Royden's theorem concerning the Teichmüller norm. 展开更多
关键词 Teichmüller space Thurston metric Royden's theorem curve complex RIGIDITY
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Cumulative effects of volcanic ash on the food preferences of two Orthopteran species
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作者 Valeria Fern&ndez-Arhex Maria E. Amadio Octavio A. Bruzzone 《Insect Science》 SCIE CAS CSCD 2017年第4期640-646,共7页
Inert dusts are an early form of insecticide which is still in use. One of the most common inert dusts is volcanic ash. In order to study the reaction ofrangeland grasshoppers, Dichroplus vittigerum (Acrididae) and ... Inert dusts are an early form of insecticide which is still in use. One of the most common inert dusts is volcanic ash. In order to study the reaction ofrangeland grasshoppers, Dichroplus vittigerum (Acrididae) and a katydid, t]wgilis mendosensis (Phaneropteridae), to the presence of volcanic ash in their food sources and how this reaction changed as a function of time, we conducted paired preference tests between clean leaves of their pre- ferred host plant and leaves exposed to volcanic ash of different grain size. The behavioral response was measured as the rating on the Thurstonian preference scale of leaves with ash in relation to clean leaves. The results showed that the avoidance of volcanic ash increased as a function of time in both species. Both species studied are occasionally exposed to vol- canic activity, and come from an area in which a volcanic eruption had recently occurred. As their populations did not decrease after the ash fall, we propose that some behavioral responses such as avoidance of places with ash, works as tolerance mechanism to inert dusts exposure. 展开更多
关键词 Burgilis mendosensis Dichroplus vittigerum inert dust preference test thurstone scale
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关于Thurston障碍的判定 献给杨乐教授80华诞
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作者 崔贵珍 彭文娟 《中国科学:数学》 CSCD 北大核心 2019年第10期1373-1376,共4页
本文利用不变图给出临界有限分歧覆盖没有Thurston障碍的一个判定条件.
关键词 临界有限分歧覆盖 Thurston障碍 不变图
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Expansion properties for finite subdivision rules I Dedicated to the Memories of William P. Thurston and Lei Tan
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作者 William J.Floyd Walter R.Parry Kevin M.Pilgrim 《Science China Mathematics》 SCIE CSCD 2018年第12期2237-2266,共30页
Among Thurston maps (orientation-preserving, postcritically finite branched coverings of the 2-sphere to itself), those that arise as subdivision maps of a finite subdivision rule form a special family. For such maps,... Among Thurston maps (orientation-preserving, postcritically finite branched coverings of the 2-sphere to itself), those that arise as subdivision maps of a finite subdivision rule form a special family. For such maps, we investigate relationships between various notions of expansion—combinatorial, dynamical, algebraic,and coarse-geometric. 展开更多
关键词 FINITE SUBDIVISION rule expanding MAP postcritically FINITE Thurston MAP
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Comparisons of Metrics on Teichmller Space
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作者 Zongliang SUN Lixin LIU 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2010年第1期71-84,共14页
For a Riemann surface X of conformally finite type (g, n), let dT, dL and dpi (i = 1, 2) be the Teichmuller metric, the length spectrum metric and Thurston's pseudometrics on the Teichmutler space T(X), respect... For a Riemann surface X of conformally finite type (g, n), let dT, dL and dpi (i = 1, 2) be the Teichmuller metric, the length spectrum metric and Thurston's pseudometrics on the Teichmutler space T(X), respectively. The authors get a description of the Teichmiiller distance in terms of the Jenkins-Strebel differential lengths of simple closed curves. Using this result, by relatively short arguments, some comparisons between dT and dL, dpi (i = 1, 2) on Tε(X) and T(X) are obtained, respectively. These comparisons improve a corresponding result of Li a little. As applications, the authors first get an alternative proof of the topological equivalence of dT to any one of dL, dp1 and dp2 on T(X). Second, a new proof of the completeness of the length spectrum metric from the viewpoint of Finsler geometry is given. Third, a simple proof of the following result of Liu-Papadopoulos is given: a sequence goes to infinity in T(X) with respect to dT if and only if it goes to infinity with respect to dL (as well as dpi (i = 1, 2)). 展开更多
关键词 Length spectrum metric Teichmuller metric Thurston's pseudo-metrics
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访问记:向W.P.Thurston提五个问题
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作者 小岛定吉 陈治中 《数学译林》 2000年第1期64-66,共3页
关键词 Thurston 数学 美国 拼接玩具 几何学
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Thurston Moore:天生的工作狂 天生的艺术家
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作者 尖儿 《音乐大观》 2007年第11期19-19,共1页
  Thurston Moore绝对就是那种传说中的工作狂--事实证明这种人确实存在,他们用永无止境的各种工作记录下自己老去的过程.……
关键词 Thurston Moore 艺术家 工作狂
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