教学课程资源库 更多>>

关键词： 大数据   创新   创业  

摘要： 伴随着我国建设创新型国家的进程,具有创新能力和创业实力的双创型人才成为教育培养的新目标。同时在大数据背景下,数据资源愈发凸显其重要性。作为研究数据的学科,统计学专业也面临新的要求和挑战。本文提出教学内容、方法、目标的“三新”教学改革思路,通过课内调整课程结构,引入项目驱动,优化教学内容,课外引入实践平台,系统培养学生统计思维能力,使其具备适应大数据时代的数据分析能力,使学生成为掌握大数据处理能力的应用型新型统计人才。

关键词： 地质统计学反演   致密砂岩   储层预测  

摘要： 鄂尔多斯盆地东缘A区为典型黄土垣地貌,地形起伏变化剧烈,沟壑纵横。在地震采集时,黄土层对地震信号的衰减作用较强,地震品质较差。另外,井径垮塌使声波和密度测井失真,进而影响了井震标定以及反演结果的准确性。针对这种“双低”的地震资料,本文提出了一套相控叠前地质统计学反演储层预测方法,即首先通过分角度叠加合成记录进行精细的井震标定,然后开展叠前确定性反演加深地质认识,并利用该结果作为地震相约束地质统计学反演,细划岩相,调整弹性参数,迭代反演结果,最终实现有效储层的边界刻画。结果表明,厚度2m以上的砂体预测符合率达到80%,取得了较好的效果。

关键词： Angler apps   Recreational fisheries   Survey   Participation   Pandemic  

摘要： From 11 March to end of May 2020 a lockdown was imposed in Denmark due to the Covid-19 outbreak. Concurrently a 20% increase in sales of mandatory national angling licenses was reported in Denmark, suggesting an increase in angling participation. Here, we use data collected from a citizen science platform for recreational anglers to a) explore whether the increase in participation affected multiple characteristics of the anglers that registered to the citizen science platform in spring 2020, and b) explore changes in angling effort and catch patterns during the lockdown as reported to the platform. The results indicate that the platform was able to detect changes in the characteristics of the participants in the Danish recreational angling during the Covid-19 lockdown, i.e. participants were younger, more likely to live in urban areas, less experienced, stated angling as a less important hobby, and less likely to be from outside of Denmark. The spring 2020 participants did not conduct more fishing trips compared to previous years, but their effort patterns differed. The effort patterns revealed a shift in fishing activity from weekend to weekday and, during the day, a shift in fishing activity from midday to early evening. These changes most likely reflect the extraordinary conditions that most Danes experienced during the lockdown. We found relatively lower catch rates and a trend towards retaining more fish, among the participants that registered in spring 2020. The results are discussed in relation to biological implications and lessons learned about data collection from citizen science platforms.

关键词： Intracranial aneurysms   Epidemiology   Survey  

摘要： Study design. - Observational retrospective survey-based study. Introduction. - Intracranial aneurysms (IA) can be treated with microsurgery or by endovascular treatments (EVT). EVT have taken an increasingly important part in IA management;the ability of neurosurgical teams to perform such surgery as well as the quality of their training is being questioned. We therefore wanted to assess the proportion of IA treated by microsurgery in France, the demography and caseload of surgeons trained in vascular neurosurgery. Methodology. - A 60-question survey was sent to the 34 French neurosurgical centers treating IA. Twenty-seven questions dealt with the demography of neurovascular surgeons and caseload. Descriptive data are reported here. Results. - Twenty-seven centers answered, giving us a response rate of 79.4%. A total of 209 neurosurgeons worked in these centers. Forty-six neurosurgeons were designated as referents in vascular neurosurgery, 47% of them were under 45 years old. Among the centers, 96.3% had at least one surgeon that was a referent in neurovascular surgery. A total of 88 surgeons performed IA surgery, but only 11 operated more than 20 IA per year. Two thousand four hundred and thirty seven unruptured IA were treated every year in these centers, 25% of which by microsurgery. A total of 2727 ruptured IA were treated in these centers, of which 15% were treated by microsurgery. The most common indications for microsurgical treatment of IA were: middle cerebral artery aneurysms, wide-neck intracranial aneurysms, and giant intracranial aneurysms, as well as aneurysms associated with a hematoma for the ruptured ones. Conclusion. - Demography of vascular neurosurgeons remains favorable, with a referent neurosurgeon in most centers, who, in half of the cases, is a young practitioner. The percentage of microsurgery in the treatment of IA is low, especially for ruptured ones. The most frequently operated types of intracranial aneurysm correspond to good practice

关键词： chasmogamy   cleistogamy   Danthonia californica   Festuca roemeri   Hygrocybe   Pyrenophora   seed endophytes   Sistotrema  

摘要： Demographic studies measure drivers of plant fecundity including seed production and survival, but few address both abiotic and biotic drivers of germination such as variation in climate among sites, population density, maternal plants, seed type and fungal pathogen abundance. We examined germination and microbial communities of seeds of Danthonia californica, which are either chasmogamous (external, wind-pollinated) or cleistogamous (internal, self-fertilized) and Festuca roemeri, which are solely chasmogamous. Seed populations were sourced across environmental gradients. We tested germination and used high-throughput sequencing to characterize seed fungal community structure. For F. roemeri, maternal plants significantly influenced germination as did climate and pathogens;germination increased from wetter, cooler sites. For D. californica, the main drivers of germination were maternal plant, seed type and pathogens;on average, more chasmogamous seeds germinated. Fungal communities depended largely on seed type, with fewer fungi associated with cleistogamous seeds, but the communities also depended on site factors such as vapor pressure deficit, plant density and whether the seeds had germinated. Putative pathogens that were negatively correlated with germination were more abundant for both D. californica and F. roemeri chasmogamous seeds than D. californica cleistogamous seeds. In D. californica, cleistogamous and chasmogamous seeds contain vastly different fungal communities.

关键词： 大数据时代   统计学   机遇与挑战   具体措施  

摘要： 二十一世纪以来,科学技术取得了长足进步,尤其在信息技术领域,以云技术和物联网为代表的一批尖端科技不断涌现,给人们的生活带来了前所未有的变革。同时,网络上的数据量成倍增长,使社会加速进入了大数据时代。统计学作为一门与数据息息相关的学科,在大数据时代发挥着重要的作用,同时也遇到了各种机遇与挑战。如何把握大数据时代的机遇,更好地迎接大数据时代的挑战,是统计学领域需要深入思考的一项重要问题。

关键词： 统计学   教与学   实践  

摘要： 随着国家创新类型的发展,统计创新引起了相关部门的关注,统计创新包括统计实践创新和统计教育创新。统计教育的创新是统计创新的基础,没有统计教育的创新,统计实践就不会创新。在统计学的基本发展趋势中,我们将探讨当前统计学教育的改革方向。

关键词： 混合式教学   统计学   教学模式  

摘要： 统计学是一门多学科相交叉的边缘学科,应用性极强。为提升统计学课程的教学质量,满足新时代社会对人才的需求,本文针对传统统计学教学中的局限,分析和实践基于混合式教学模式在统计学教学中的应用策略和方法。实践表明,通过混合式教学,能激发学生学习的兴趣与动力,丰富统计学的教学形式与内容,促进统计学教学质量的提升。

关键词： 全人育人   统计学   教学模式  

摘要： 全人教育是人类历史上出现的一个重要的教育流派,它着眼于全面的人的理论研究和实践探索,学界强调人的全面、整体、均衡发展的观点和信念称之为全人教育理念。因此,本文在分析大数据背景下《统计学基础》课程存在的问题、解决问题的方法思考以及大数据背景下基于全人育人的统计学教学模式思考。

关键词： 统计学   统计学发展   统计教育改革  

摘要： 根据国家社会经济发展的趋势来看,统计学的教育改革已经提上日程,本文将详细介绍统计学发展趋势及统计教育改革所涉及的层面与内容。对于统计学的创新主要涉及:其一是统计实践的改革;其二是统计教育的改革。教育是实践的基础,科学的预测统计学的发展方向与趋势,进而帮助教师培养出适合现今社会发展的高端人才。