一类二元非乘积型Meyer-knig-Zeller概率算子的饱和定理

借助二元抛物线引理,探讨一类二元非乘积型Meyer-knig and Zeller概率算子的饱和性,得到了一个点态饱和定理.     

Anatomical societies find new ways to come together in a post-Covid world

The world has been turned upside down by a global health emergency caused by the Covid-19. Given the high contagiousness of the virus and the need to contain its spread, social distancing rules, self-isolation policies, and geographical lockdowns have been enforced globally. Over the pandemic emergency the majority of the planned in-person meetings and congresses of national and international anatomical societies have been postponed or canceled. It is unclear what the future holds, but times of crisis often present possibilities for re-thinking old ways to achieve a more critical approach. It has become increasingly clear that traditional in-person congress formats of scientific societies need to be reevaluated. Over the past year and a half, two types of congressional modalities have been trialed to address the challenge of the pandemic as far as scientific meetings are concerned: the fully virtual congress, in which case the conference program is live streamed to all of the attendees, and the hybrid congress, in which case some of the attendees physically participate at the congress's venue while others interact via a virtual platform. The current study set out to investigate the technical difficulties, social challenges, costs and sustainability, logistics and management issues linked to holding various types of congresses in the post-Covid world. Anatomical societies throughout the world are actively striving to reshape their response to the current global emergency and to uncover new types of conference modalities in the effort to keep scientific exchange alive and flourishing in the post-Covid era.     

2CUL Slavic: The View So Far

In fall 2016, the Columbia-Cornell collaboration in the area of Slavic & East European resource coordination and sharing celebrated its sixth year. The author reviews particulars of the development, implementation, and function of this program as well as some of the challenges that face such cross-institutional efforts.     

发电企业防范知识型员工流失的管理策略

随着国内电力市场化改革的逐步深入,知识型员工作为掌握专业技术知识的人才,日益成为企业间争夺的对象.本文探讨了知识型员工的特点,并由此入手分析了知识型员工流失的原因,提出了一套变管理为服务的制度以及防范该类员工流失可能对企业造成损失的措施.     

Science Letters:Discovery of ultrahigh-T spinel-garnet granulite with pure CO_2 fluid inclusions from the Altay orogenic belt, NW China

We first report discovery of the spinel-garnet-orthopyroxene granulite with pure CO2 fluid inclusions from the Fuyun region of the late Paleozoic Altay orogenic belt in Central Asia, NW China. The rock is characterized by an assemblage of garnet, orthopyroxene, spinel, cordierite, biotite, plagioclase and quartz. Symplectites of orthopyroxene and spinel, and orthopyroxene and cordierite indicate decompression under UHT conditions. Mineral chemistry shows that the or-thopyroxenes have high XMg and A12O3 contents (up to 9.23 wt%). Biotites are enriched in TiO2 and XMg and are stable under granulite facies conditions. The garnet and quartz from the rock carry monophase fluid inclusions which show peak melting temperatures of around -56.7℃, indicating a pure CO2 species being presented during the ultrahigh-T metamorphism in the Altay orogenic belt. The inclusions homogenize into a liquid phase at temperatures around 15.3-23.8℃ translating into CO2 densities of the order of 0.86-0.88 g/cm3. Based on prelim     

笛卡尔积的几个公式

本文通过集合论的方法得出笛卡尔积的内域,闭包,导集的三个公式,并由此确定了笛卡尔积的集合类型.     

浅谈在政治课教学中如何培养创新人才

创新教育是以培养人的创新精神和创新能力为目的的.政治课作为基础教育的一门重要课程,它应如何体现创新教育,如何培养学生的创新意识和创新能力,以实现创新教育的目的,这是政治课教改的一个重要内容.     

论古诗词中的"鸿雁"意象

意象是诗词意境的重要构成单位,在古诗词中有着特殊位置。意象既不是物本身,亦不是心自体,而是二者互孕共生的产物,是主观情意与客观物象的完美融合。"鸿雁"是中国古诗词中常见意象,作为客观物的鸿雁,经过诗人独特的人文体验与刻意营造,具有了丰富的意蕴。本文试从建构类型上将古诗词中的"鸿雁"意象进行分类,并分析探讨其各自蕴含的丰富寓意。     

一类Riccati型方程的可积判据

对一类Riccati微分方程引入特征方程的概念，给出了该类方程一个实用的可积充分判撮，从而得到了Riccati地方程的一个新的可积类．     

认清形势深化高校体育教育改革

进入新世纪 ,我国高校体育的教学内容、教学方法将更具多样性 ,教育目标将从单纯的身体教育观发展到终身体育观 ,对高校体育教师也提出更高、更全面的要求。