道歉言语行为范畴的原型效应

原型范畴理论是认知语言学中重要的范畴理论之一,对语言各个层面的研究都产生了深远的影响。道歉言语行为是一种重要的施为性言语行为,也同样具有家族相似的特征,并表现出范畴的原型效应。以原型范畴为理论框架对汉语中"道歉"言语行为的实例一范畴进行分析,能有效把握其显示出的原型特点。     

论网络媒体和传统媒体的角色差异——郭德刚事件舆论传播解读

郭德刚事件由公众人物与媒体之间的司法纠纷演变成一场有关公共道德和社会风气的大讨论.传统媒体在事件中大都持批评郭德刚的立场,网络舆论则经历了由"倒郭"到"挺郭"的转变,造成传统媒体和网民立场差异的根源是公众对传统媒体舆论监督的越位及公权力介入公共讨论的不满,以及网络舆论的"反沉默螺旋"效应.郭德刚事件凸显了权力与公众冲突时传统媒体与网络媒体的角色差异.     

高职院校课程生态教学改革的探索——以CorelDRAW为例

在创建生态校园的背景下,从教育生态学的视角下,运用生态位原理,限制因子定律、花盆效应来指导高职院校中CorelDRAW的课程教学改革,力图为高职院校的课程改革提供新的思路,创建新的可持续发展的教学模式。     

纵向数据线性混合模型中M估计的渐近正态性

对纵向数据的线性混合模型yk=Xkβ＋Ckτk＋ek用Fisher得分迭代法得到了参数的M估计（稳健估计）,并在一系列的正则条件下,证明了参数M估计的渐近性质．     

从伯克的"语言四维度"看"印象系列"的修辞效果

在<语言是象征行动>中,伯克明确提出语言四个基本维度:诗学、逻辑与语法、修辞以及伦理学.这四个维度几乎覆盖了语言的所有范围:诗学语言在富有情感的同时也含有理性的成分;逻辑语言并不仅仅局限于语法及逻辑思维,更应与理性相结合,指导行动;修辞语言贵在用劝说、劝勉的语气达到合作竞争的目的;伦理语言,要求我们真实准确地表达人格品...     

传统文化在广告中的运用

传统文化是一个动态概念,是文明演化而汇集成的一种反映民族特质和风貌的历史产物,是历史上各种思想文化、观念形态的总体表征.而植根于传统文化之中的广告在主题选择,广告语运用,表达方式等方面必然受其影响.因此,清楚了解传统文化在广告中的作用,努力寻找传统文化与广告的结合点,做到两者的平衡与协调对现代商家广告理想效果的取得尤为...     

政府补贴对制造业企业绩效的影响 ——基于高技术产业和一般制造业中介效用比较研究

现有研究对于政府对制造业补贴能否提高制造业绩效存有争议。通过理论分析认为,研发投入是提高制造业绩效的有效途径,而且相比于一般制造业研发投入对高技术产业的绩效提高效果更为明显。同时研发投入需要大量资金,如果一味增加研发投入,可能挤占其他部门资金。因此,政府补贴能够通过提高企业的研发投入促进企业绩效提升,而且对于高技术产业企业绩效提升的正面影响要大于对一般制造业;并通过A股上市企业的数据进行实证研究,证明以上研究结论。这意味着政府应该对企业进行补贴,而且应该重点补贴高技术产业。     

Anisotropic fluoride nanocrystals modulated by facet-specific passivation and their disordered surfaces

Rutile-type fluorides have been proven to be active components in the context of emerging antiferr-omagnetic devices. However, controlled synthesis of low-dimensional, in particular two-dimensional (2D), fluorides in a predictable and deterministic manner remains unrealized because of a lack of efficient anisotropic control, which impedes their further development in reduced dimensions. We report here that altered passivation of {110} growing facets can direct the synthesis of rutile-type fluoride nanocrystals into well-defined zero-dimensional (0D) particulates, one-dimensional (1D) rods and 2D sheets in a colloidal approach. The obtained nanocrystals show positive exchange bias and enhanced magnetic transition temperature from the coexistence of long-range antiferromagnetic order and disordered surface spins, making them strong alternatives for flexible magnetic devices and sensors.     

Superconductivity in chromium nitrides Pr3Cr10-xN11 with strong electron correlations

Exploration of superconductivity in Cr-based compounds has attracted considerable interest because only a few Cr-based superconductors (CrAs, A₂Cr₃As₃ and ACr₃As₃ (A = K, Rb, Cs, Na)) have been discovered so far and they show an unconventional pairing mechanism. We report the discovery of bulk superconductivity at 5.25 K in chromium nitride in Pr₃Cr_10-xN₁₁ with a cubic lattice structure. A relatively large upper critical field of H_c2(0) ∼ 12.6 T is determined, which is larger than the estimated Pauli-paramagnetic pair-breaking magnetic field. The material has a large electronic specific-heat coefficient of 170 mJ K⁻² mol⁻¹—about 10 times larger than that estimated by the electronic structure calculation, which suggests that correlations between 3d electrons are very strong in Pr₃Cr_10-xN₁₁, and thus quantum fluctuations might be involved. Electronic structure calculations show that the density of states at the Fermi energy are contributed predominantly by Cr 3d electrons, implying that the superconductivity results mainly from the condensation of Cr 3d electrons. Pr₃Cr_10-xN₁₁ represents a rare example of possible unconventional superconductivity emerging in a 3D system with strong electron correlations. Nevertheless, clarification of the specific pairing symmetry needs more investigation.     

Local and teleconnected temperature effects of afforestation and vegetation greening in China

Afforestation in China provides carbon sequestration and prevents soil erosion, but its remote impacts on climate in other regions via the coupling of forest energy fluxes with atmospheric circulation are largely unknown. Here, we prescribe inventory-based forest cover change and satellite-observed leaf area index from 1982 to 2011 in a coupled land-atmosphere model to simulate their biophysical climate effects. Both local and global surface air temperatures show a seasonal contrast in response to past vegetation cover expansion over China: a phenomenon we primarily attribute to a variation of seasonality of vegetation greening. A large cooling in spring results in concurrent decreases in geopotential height over China and zonal wind over Mongolia, causing a dipole structure in the upper troposphere over the Arctic. This accounts for ∼58% of simulated spring warming over the Russian Arctic and ∼61% of simulated spring cooling over the Canadian Artic. Our results imply that spring vegetation dynamics in China may affect climate in northern high latitudes.