从中国留学生在英国的学习表现看我国教育存在的问题及对策

近年来,越来越多的中国学生选择在国外高校学习深造,中国学生在国际化教育背景下的表现彰显了现阶段我国教育中存在的问题。借鉴国外院校优秀的教育理念和模式,结合我国教育自身的特点,寻找解决教育问题的对策,是当前提高我国教学质量、加强学生素质培养的有效途径。     

中法战争时期张之洞的军事方略

中法战争时期,张之洞根据形势的变化,提出了积极防御、周密部署、借用民众力量、持久作战等军事方略,并以此为依据,开展了一系列的军事实践,取得了一定的效果,为中法战争的胜利奠定了良好的基础。     

小学生数学语言表述能力现状调查分析和提升策略

基于崇仁师范附属小学高年级小学生数学语言表述能力现状进行调查,在此基础上,提出其提升策略。     

Surface superconductivity in the type II Weyl semimetal TaIrTe4

The search for unconventional superconductivity in Weyl semimetal materials is currently an exciting pursuit, since such superconducting phases could potentially be topologically non-trivial and host exotic Majorana modes. The layered material TaIrTe₄ is a newly predicted time-reversal invariant type II Weyl semimetal with the minimum number of Weyl points. Here, we report the discovery of surface superconductivity in Weyl semimetal TaIrTe₄. Our scanning tunneling microscopy/spectroscopy (STM/STS) visualizes Fermi arc surface states of TaIrTe₄ that are consistent with the previous angle-resolved photoemission spectroscopy results. By a systematic study based on STS at ultralow temperature, we observe uniform superconducting gaps on the sample surface. The superconductivity is further confirmed by electrical transport measurements at ultralow temperature, with an onset transition temperature (T_c) up to 1.54 K being observed. The normalized upper critical field h*(T/T_c) behavior and the stability of the superconductivity against the ferromagnet indicate that the discovered superconductivity is unconventional with the p-wave pairing. The systematic STS, and thickness- and angular-dependent transport measurements reveal that the detected superconductivity is quasi-1D and occurs in the surface states. The discovery of the surface superconductivity in TaIrTe₄ provides a new novel platform to explore topological superconductivity and Majorana modes.     

基于因子分析法的农业上市公司财务状况评价研究

通过对农业板块上市公司的财务指标进行分析,建立了农业上市公司财务状况的综合评价指标体系,并根据多元统计的因子分析法构建了我国农业类上市公司财务状况的因子分析模型。在此基础上对上市公司综合得分进行排名,科学、合理地评价了财务状况。     

图书馆学学科知识地图的构建

简要介绍了知识地图的概念及构建方法,通过对CSSCI2003-2005年数据的统计分析,构建了图书馆学关键词关联图、学科专家知识地图、学科交叉图等学科知识地图,并提出了应用聚类分析来构建图书馆学关键词聚类树状图的方法。     

基于整合能力的供应链伙伴关系与企业竞争优势研究

激烈的市场竞争使得越来越多的企业期望通过建立供应链伙伴关系来获取竞争优势,但多数效果并不明显,不少经营者对此倍感困惑。本文在理论分析的基础上,采用问卷调查的方式探讨伙伴关系、供应链整合能力与企业竞争优势之间的关系。研究结果显示:透过供应链内部和外部整合力,伙伴关系对竞争优势的间接影响高于其直接影响,整合能力是企业利用伙伴关系获取竞争优势的关键。     

基于差异沉降控制的桩基优化设计

为解决传统桩基承载力低的问题,基于差异沉降控制优化设计桩基.分析桩基设计存在的问题,主要包括:桩基支承刚度设定误差高、桩基差异沉降大、桩基结构设计不合理,通过设定桩基支承刚度,控制桩基差异沉降,采用桩基塌孔承桩断裂结构,实现对桩基的优化设计.设计实例分析,结果表明,设计的桩基承载力明显高于对照组,能够解决传统桩基承载力...     

Genomic diversity and post-admixture adaptation in the Uyghurs

Population admixture results in genome-wide combinations of genetic variants derived from different ancestral populations of distinct ancestry, thus providing a unique opportunity for understanding the genetic determinants of phenotypic variation in humans. Here, we used whole-genome sequencing of 92 individuals with high coverage (30–60×) to systematically investigate genomic diversity in the Uyghurs living in Xinjiang, China (XJU), an admixed population of both European-like and East-Asian-like ancestry. The XJU population shows greater genetic diversity, especially a higher proportion of rare variants, compared with their ancestral source populations, corresponding to greater phenotypic diversity of XJU. Admixture-induced functional variants in EDAR were associated with the diversity of facial morphology in XJU. Interestingly, the interaction of functional variants between SLC24A5 and OCA2 likely influences the diversity of skin pigmentation. Notably, selection has seemingly been relaxed or canceled in several genes with significantly biased ancestry, such as HERC2–OCA2. Moreover, signatures of post-admixture adaptation in XJU were identified, including genes related to metabolism (e.g. CYP2D6), digestion (e.g. COL11A1), olfactory perception (e.g. ANO2) and immunity (e.g. HLA). Our results demonstrated population admixture as a driving force, locally or globally, in shaping human genetic and phenotypic diversity as well as in adaptive evolution.     

论长三角城市群空间演进中的竞争策略

在经济全球化、区域一体化、地方行政力量调整和可持续发展的外部背景下,长三角城市群空间格局正经历着变革性的演变,城市群竞争力的塑造也面临着诸如行政力量变动、基础设施消长、生态控制等突出的问题。而从国外城市群空间开发和竞争力提升的经验来看,空间结构扁平化、空间联系多向性和城市群空间特性服务于地域综合开发的趋势是竞争力得以获得的途径所在。因此,未来的长三角城市群在借鉴国外经验解决自身发展障碍、参与全球竞争时的具体策略在于制度整合国际化、经济发展空间均衡化、竞争永续性和核心边缘地区统筹化。