新建多校区高校图书馆面临的问题及对策     

翟文礼 《台州学院学报》2011,33(1):92-96

以台州学院为例,分析了一校多区格局下,新建地方性高等院校图书馆在运行机制、资源配置以及读者服务等方面所面临的主要问题。提出只有确立综合性大学综合性管理理念,理顺管理运行机制,优化资源配置,创新服务体系,提升服务水平,多校区图书馆的建设才能适应学校快速发展的步伐,更好地服务于教学、科研和社会服务。  相似文献   

构建零售业服务链战略理论框架的研究     

翟金芝 《黄山学院学报》2011,13(1):53-56

零售业服务链战略理论框架的构建是从价值链管理理论与零售理论相结合的角度出发的,其内容包括零售轮转理论、辩证进程学说、手风琴学说、自然选择学说和价值链理论等几个部分.它以顾客需求为诉求点,把顾客需求信息传递给零售企业,再由零售企业传递给供应商、分销商,从而实现把满足顾客需要的产品及相关服务投放市场这一战略目的.  相似文献   

钢琴伴奏艺术在声乐表现艺术中的魅力     

翟鑫 《南昌教育学院学报》2011,26(3):55+75-55,75

钢琴作为乐器之王,其可以为人声,或是对任何一种乐器进行伴奏,尤其钢琴伴奏在声乐表现中承担了渲染及补充音乐情绪的重要作用。本文首先简述了钢琴伴奏在声乐表演艺术中的地位,进而对钢琴伴奏在声乐表演艺术中的作用进行了探讨,最后总结了在钢琴伴奏与声乐的完美配合上需要注意的几个方面。  相似文献   

Rapid phenotypic evolution with shallow genomic differentiation during early stages of high elevation adaptation in Eurasian Tree Sparrows     

Yanhua Qu  Chunhai Chen  Ying Xiong  Huishang She  Yong E Zhang  Yalin Cheng  Shane DuBay  Dongming Li  Per G P Ericson  Yan Hao  Hongyuan Wang  Hongfeng Zhao  Gang Song  Hailin Zhang  Ting Yang  Chi Zhang  Liping Liang  Tianyu Wu  Jinyang Zhao  Qiang Gao  Weiwei Zhai  Fumin Lei 《国家科学评论(英文版)》2020,7(1):113

Known as the ‘third polar region’, the Qinghai-Tibet Plateau represents one of the harshest highland environments in the world and yet a number of organisms thrive there. Previous studies of birds, animals and humans have focused on well-differentiated populations in later stages of phenotypic divergence. The adaptive processes during the initial phase of highland adaptation remain poorly understood. We studied a human commensal, the Eurasian Tree Sparrow, which has followed human agriculture to the Qinghai-Tibet Plateau. Despite strong phenotypic differentiation at multiple levels, in particular in muscle-related phenotypes, highland and lowland populations show shallow genomic divergence and the colonization event occurred within the past few thousand years. In a one-month acclimation experiment investigating phenotypic plasticity, we exposed adult lowland tree sparrows to a hypoxic environment and did not observe muscle changes. Through population genetic analyses, we identified a signature of polygenic adaptation, whereby shifts in allele frequencies are spread across multiple loci, many of which are associated with muscle-related processes. Our results reveal a case of positive selection in which polygenic adaptation appears to drive rapid phenotypic evolution, shedding light on early stages of adaptive evolution to a novel environment.  相似文献   

Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing     

Cong Liu  Feng An  Paria S M Gharavi  Qinwen Lu  Junkun Zha  Chao Chen  Liming Wang  Xiaozhi Zhan  Zedong Xu  Yuan Zhang  Ke Qu  Junxiang Yao  Yun Ou  Zhiming Zhao  Xiangli Zhong  Dongwen Zhang  Nagarajan Valanoor  Lang Chen  Tao Zhu  Deyang Chen  Xiaofang Zhai  Peng Gao  Tingting Jia  Shuhong Xie  Gaokuo Zhong  Jiangyu Li 《国家科学评论(英文版)》2020,7(1):84

Complex oxides with tunable structures have many fascinating properties, though high-quality complex oxide epitaxy with precisely controlled composition is still out of reach. Here we have successfully developed solution-based single-crystalline epitaxy for multiferroic (1-x)BiTi_(1-y)/2Fe_yMg_(1-y)/2O₃–(x)CaTiO₃ (BTFM–CTO) solid solution in large area, confirming its ferroelectricity at the atomic scale with strong spontaneous polarization. Careful compositional tuning leads to a bulk magnetization of 0.07 ± 0.035 μ_B/Fe at room temperature, enabling magnetically induced polarization switching exhibiting a large magnetoelectric coefficient of 2.7–3.0 × 10⁻⁷ s/m. This work demonstrates the great potential of solution processing in large-scale complex oxide epitaxy and establishes novel room-temperature magnetoelectric coupling in epitaxial BTFM–CTO film, making it possible to explore a much wider space of composition, phase, and structure that can be easily scaled up for industrial applications.  相似文献   

Understanding human influence on climate change in China     

Ying Sun  Xuebin Zhang  Yihui Ding  Deliang Chen  Dahe Qin  Panmao Zhai 《国家科学评论(英文版)》2022,9(3)

China''s climate has been warming since the 1950s, with surface air temperature increasing at a rate higher than the global average. Changes in climate have exerted substantial impacts on water resources, agriculture, ecosystems and human health. Attributing past changes to causes provides a scientific foundation for national and international climate policies. Here, we review recent progress in attributing the observed climate changes over past decades in China. Anthropogenic forcings, dominated by greenhouse gas emissions, are the main drivers for observed increases in mean and extreme temperatures. Evidence of the effect of anthropogenic forcings on precipitation is emerging. Human influence has increased the probability of extreme heat events, and has likely changed the occurrence probabilities for some heavy precipitation events. The way a specific attribution question is posed and the conditions under which the question is addressed present persistent challenges for appropriately communicating attribution results to non-specialists.  相似文献   

教育均衡发展:理论、指标及测算方法   总被引：56，自引：0，他引：56  

翟博 《教育研究》2006,27(3):16-28

教育均衡实质上是指在教育公平思想和教育平等原则的支配下,教育机构和受教育者在教育活动中有平等待遇的理想和确保其实际操作的教育政策和法律制度。教育均衡发展的本质是追求教育平等,实现教育公平。教育均衡发展从宏观层面分析是教育供给与需求的均衡,从中观层面分析是教育资源配置的均衡,从微观层面分析是学校教育过程包括内部课程教学资源配置的均衡、教育结果的均衡以及教育评价的均衡。教育均衡发展是一个历史范畴,按其实现程度可分为四个阶段。建立适应我国国情的基础教育特别是义务教育均衡发展指数,科学地选择基础教育均衡发展的要素,明确基础教育均衡发展的目标,具有重要的现实意义。数据分析表明,我国基础教育从整体上看正在趋向均衡。  相似文献   

超高含水原油混合流动及初始沉积特性     

邢晓凯  吕朝旭  刘珈铨 《中国科学院大学学报》2020,37(2):228-233

使用自行设计的实验装置,对超高含水原油的流动特性和初始沉积过程进行探究。系统研究实验温度、混合流速和体积含水率对超高含水原油初始沉积过程的影响,分析不同温度下原油的运动形态和初始沉积方式。初始沉积过程可分为蔓延沉积过程和粘连沉积过程,根据沉积特点和压降曲线的变化趋势将初始沉积过程分为3个阶段：沉积诱导期、快速沉积期和沉积动态平衡期。通过对沉积物碳数分布的分析,得知超高含水原油初始沉积过程中,同时存在剪切剥离作用、胶凝作用和分子扩散作用。实验温度和体积含水率主要通过改变胶凝作用和分子扩散来影响初始沉积过程,混合流速通过改变剪切剥离强度来影响初始沉积过程。  相似文献   

南京新旧探空系统资料差异分析     

黄文杰  赵美  翟伶俐  魏晓奕 《科技通报》2013,29(2):19-21

通过对新旧探空系统(即L波段探空系统和59-701探空系统)中GST1型数字式电子探空仪和59型机械式探空仪所探测到的探空资料,采用标准差和平均差的方法比较分析了南京站同步高空观测的一个月资料,分别从探空温度、探空高度、探空湿度等方面作了详细地差异分析,对比了两种高空探测系统所获得资料的差异及其所产生差异的原因分析.结果表明:L波段探空系统比59-701探空系统所测得的高空探测温度和探测高度资料更加稳定、离散率更小;所测得的湿度,59-701探测系统有较高的稳定性,而L波段探测系统则有更高的灵敏度,两套探测系统的湿度都是随探空高度的增大而差值变大.通过对新旧探空系统地分析,以便更好地利用和改进现有的高空探测系统.  相似文献   

基于产品评论挖掘的竞争产品优势分析     

翟东升  徐颖  黄鲁成  赵京 《情报杂志》2013,(2):45-51,66

如今网络已经成为信息交换的工具,网络中出现了大量的用户评论信息,利用产品评论挖掘技术获取竞争产品的情报数据,对于企业和用户都具有重要意义。利用已有的研究成果,将产品评论挖掘应用于竞争产品的优势分析之中。并以手机为例,以iPhone4和N8作为研究对象,经过数据采集、预处理、建立产品特征集合和评论观点集合、评论观点的极性与强度判断等工作,量化用户观点,以4种图表形式显示结果,并根据图表分析竞争产品的优势及需要改进的方向。  相似文献