构式研究,从1995年Goldberg出版她的博士论文《Constructions:A Construction Grammar Approach to Argument Structure》到2006年发表专著《Constructions at Work:The Nature of Generalization in Language》,前后经历了十年。十年...构式研究,从1995年Goldberg出版她的博士论文《Constructions:A Construction Grammar Approach to Argument Structure》到2006年发表专著《Constructions at Work:The Nature of Generalization in Language》,前后经历了十年。十年来所经历的嬗变,首先明显地表现在对构式的规定上:从构式是不可预测的,到即使可预测但只要有充分的出现频率也是作为构式储存的。这一变化,从研究本身来说,反映了构式语法研究不满足于只关注个体认知机制的研究,而开始向着社会认知机制研究的发展趋势。展开更多
该研究结合近年来学界热门的语料库和构式研究,借助英国国家语料库(British National Corpus)检索"in+N.+of"构式,并选取其中出现频率最高的十个短语进行定量分析。研究发现,这类构式普遍出现在书面语中,口语表达中使用较少,...该研究结合近年来学界热门的语料库和构式研究,借助英国国家语料库(British National Corpus)检索"in+N.+of"构式,并选取其中出现频率最高的十个短语进行定量分析。研究发现,这类构式普遍出现在书面语中,口语表达中使用较少,并且,其普遍在非学术性文本中出现频率最高。这一研究结果对写作选词准确度的提升有一定作用,使正确的表达出现在合适的文本中,避免表达产生歧义。展开更多
Hydrodynamic and turbulent structures in the trayed bubble column with 1.2 m inner diameter have been characterized from liquid-phase velocity-time series data obtained by the hot-film anemometer. Wavelet transform an...Hydrodynamic and turbulent structures in the trayed bubble column with 1.2 m inner diameter have been characterized from liquid-phase velocity-time series data obtained by the hot-film anemometer. Wavelet transform analysis was used for denoising the measured data and also for evaluating quantifiers of turbulence, viz., local intermittency measure, intermittency index and flatness factor. These quantifiers help in detecting the passage of bubbles and reveal the hidden structures and patterns in data. Also, the wavelet scalewise analysis of the turbulence at various locations in the column and under different operating conditions could be used to build a direct relationship between the local gas holdup and flatness factor. The methodology is therefore suitable for online evaluation of the trayed bubble column performance and shows promise for developing strategies for improving process performance.展开更多
In order to study the sliding characteristics when the cable is connected with the other rods in the transmission line structures,a linear sliding cable element based on updated Lagrangian formulation and a sliding ca...In order to study the sliding characteristics when the cable is connected with the other rods in the transmission line structures,a linear sliding cable element based on updated Lagrangian formulation and a sliding catenary element considering the out-of-plane stiffness coefficient are put forward.A two-span and a three-span cable structures are taken as examples to verify the sliding cable elements.By comparing the tensions of the two proposed cable elements with the existing research results,the error is less than 1%,which proves the correctness of the proposed elements.The sliding characteristics should be considered in the practical engineering because of the significant difference between the tensions of sliding cable elements and those of cable element without considering sliding.The out-of-plane stiffness coefficient and friction characteristics do not obviously affect the cable tensions.展开更多
A series of physical modelings in which a main roof is considered as a Kirchhoff plate supported or clammed by Winkler elastic foundation were performed to simulate the fracturing process of the main roof in longwall ...A series of physical modelings in which a main roof is considered as a Kirchhoff plate supported or clammed by Winkler elastic foundation were performed to simulate the fracturing process of the main roof in longwall mining. Based on these modelings spatial structures of the main roof after its fracture are described, blocks of the fractured main roof are classified and their behaviors are analyzed in this paper. Additionally, two stability indexes of the structures are defined, and the factors affecting stability of the structures with different boundaries and geometric conditions are discussed.展开更多
Let W = {ω1,ω2,…,ωn-1} be a minimal generating transposition set of Sn. In this paper it was shown that V = （0, p）W = {（0, p）ω1, （0, p）ω2…, （0,p）ωn-1} is a minimal generating set of alternating group A...Let W = {ω1,ω2,…,ωn-1} be a minimal generating transposition set of Sn. In this paper it was shown that V = （0, p）W = {（0, p）ω1, （0, p）ω2…, （0,p）ωn-1} is a minimal generating set of alternating group An＋1, where p ∈{1, 2, …, n}. And then we investigated the automorphism groups of Cayley graphs on alternating groups with these generating sets which contain alternating group graph AGn.展开更多
文摘构式研究,从1995年Goldberg出版她的博士论文《Constructions:A Construction Grammar Approach to Argument Structure》到2006年发表专著《Constructions at Work:The Nature of Generalization in Language》,前后经历了十年。十年来所经历的嬗变,首先明显地表现在对构式的规定上:从构式是不可预测的,到即使可预测但只要有充分的出现频率也是作为构式储存的。这一变化,从研究本身来说,反映了构式语法研究不满足于只关注个体认知机制的研究,而开始向着社会认知机制研究的发展趋势。
文摘该研究结合近年来学界热门的语料库和构式研究,借助英国国家语料库(British National Corpus)检索"in+N.+of"构式,并选取其中出现频率最高的十个短语进行定量分析。研究发现,这类构式普遍出现在书面语中,口语表达中使用较少,并且,其普遍在非学术性文本中出现频率最高。这一研究结果对写作选词准确度的提升有一定作用,使正确的表达出现在合适的文本中,避免表达产生歧义。
文摘Hydrodynamic and turbulent structures in the trayed bubble column with 1.2 m inner diameter have been characterized from liquid-phase velocity-time series data obtained by the hot-film anemometer. Wavelet transform analysis was used for denoising the measured data and also for evaluating quantifiers of turbulence, viz., local intermittency measure, intermittency index and flatness factor. These quantifiers help in detecting the passage of bubbles and reveal the hidden structures and patterns in data. Also, the wavelet scalewise analysis of the turbulence at various locations in the column and under different operating conditions could be used to build a direct relationship between the local gas holdup and flatness factor. The methodology is therefore suitable for online evaluation of the trayed bubble column performance and shows promise for developing strategies for improving process performance.
基金Project(51308193)supported by the National Natural Science Foundation of ChinaProject(SGKJ[2007]116)supported by the Science and Technology Program of State Grid Corporation of China
文摘In order to study the sliding characteristics when the cable is connected with the other rods in the transmission line structures,a linear sliding cable element based on updated Lagrangian formulation and a sliding catenary element considering the out-of-plane stiffness coefficient are put forward.A two-span and a three-span cable structures are taken as examples to verify the sliding cable elements.By comparing the tensions of the two proposed cable elements with the existing research results,the error is less than 1%,which proves the correctness of the proposed elements.The sliding characteristics should be considered in the practical engineering because of the significant difference between the tensions of sliding cable elements and those of cable element without considering sliding.The out-of-plane stiffness coefficient and friction characteristics do not obviously affect the cable tensions.
文摘A series of physical modelings in which a main roof is considered as a Kirchhoff plate supported or clammed by Winkler elastic foundation were performed to simulate the fracturing process of the main roof in longwall mining. Based on these modelings spatial structures of the main roof after its fracture are described, blocks of the fractured main roof are classified and their behaviors are analyzed in this paper. Additionally, two stability indexes of the structures are defined, and the factors affecting stability of the structures with different boundaries and geometric conditions are discussed.
基金This work is supported by National Natural Science Foundation of China （10671081） Scientific and Techno- logical Project of Hubei Province （2006AA412C27） Science Foundation of Three Gorges University （604401）.
文摘Let W = {ω1,ω2,…,ωn-1} be a minimal generating transposition set of Sn. In this paper it was shown that V = （0, p）W = {（0, p）ω1, （0, p）ω2…, （0,p）ωn-1} is a minimal generating set of alternating group An＋1, where p ∈{1, 2, …, n}. And then we investigated the automorphism groups of Cayley graphs on alternating groups with these generating sets which contain alternating group graph AGn.
