永昌白族先民聚居史证——永昌《栖贤山报恩梵刹记》考

永昌《栖贤山报恩梵刹记》载有捐资修寺者苏庆父子事及其寺的格局,史证了白族先民曾在隆阳区,即古代永昌府聚居的史实;而记载碑文之《南园漫录》,则史证了白族先民在此地消失的开始。     

数字语音室耳机故障分析与处理

数字语音室已在高校中普及,并且使用率很高。通过分析6个数字语音室2个学期的设备维修数据,发现耳机是最容易损坏的设备,主要的故障有麦克噪音、麦克无声、耳机无声和单声道,因此对耳机的及时维修是数字语音室有效维护的关键。     

FDI对河南省经济发展的影响研究

从河南省FDI现状及与区域GDP的比较入手,利用大量的数据资料,从产业结构、进出口贸易和劳动力就业等方面进行说明,并通过对各地市的FDI进行比较得出,FDI对河南省经济发展的影响是显著的,但它在各地的分布极不均衡。     

对分课堂模式在药用植物学与生药学教学中的应用

药用植物学与生药学是高校药学专业的核心课程。对分课堂是一种崭新的教学模式,有效融合了传统讲授式教学与讨论式教学的优点,能够提高学生学习的积极性和主动性。本文将对分课堂教学模式应用到药用植物学与生药学的教学实践中,发现该模式有效地提高了学生的课堂参与度,激发了学生的学习积极性,促进了独立思考能力和团队协作能力。     

2020春季开学第一课语文教学案例

随着疫情形势的逐渐好转,各行各业相继复工复产,各中小学校也将陆续开学。为了抚慰疫情给孩子们的心灵带来的影响,时值春季,我们选择了毛泽东的《七绝·咏蛙》作为开学后语文教学的第一课。     

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.     

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

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.     

在C++中实现运行时的多态性过程的研究

介绍了实现运行时的多态性几个重要因素——虚函数、基类和派生类。通过实例阐述了虚函数如何实现运行时的多态性的,用运行结果数据详细分析了运行时的多态性的过程。最后说明了动态绑定实现的原理。     

数字图书馆中的数字图像处理技术

随着数字化和网络技术的发展,数字图像技术在数字图书馆信息资源中具有重要的作用.介绍了数字图像处理和分析的相关技术,阐述了数字图像技术在数字图书馆中的意义.