试论李白的写景诗

李白写景诗的风格外观是多色调的,有神奇的美、壮丽的美,也3有清丽含蓄的美。李白写景诗的内涵是时代精神充分个性化的、形象的表现,盛唐气象通过李白的“济世”热情和飘逸个性,转化为空间时间化的动态意象。在艺术创造上,李白继承了“兴寄”和“自然”两大写景传统,在个性表现和自然生成的基础上,一方面尽量呈现对景物的原初感觉,另一方面又象征寄托着深厚的时代内容,是比兴兼得的典范。     

水面蹼泳小幅度高频率技术的力学分析

在运动训练竞赛实践的基础上，从力学的角度分析了水面蹼泳小幅度、高频率鞭水技术的合理性，并从运动员选材、训练以及比赛器材等方面提出了如何发挥水面蹼泳小幅度、高频率的鞭水技术优势的建议。     

职业技能大赛给体育高职院校实践课程改革的启示

体育高职教育的根本目的是为体育产业不断培养高素质技能型人才。而职业技能大赛做为体育高职院校自身实践教学改革的一个引导,在职业教育大环境里起到了重要的作用。通过文献研究和对比分析,从我国体育高职院校技能大赛的视角出发探讨实践课程的教学改革。技能大赛能有效刺激学生学习动力,提高教师教学效果,形成校企合作,丰富教学资源,大幅改善实践课程水平。     

信息咨询服务——图书馆改革与市场化的突破口

针对图书馆馆员将被"屠杀"这一发展必然,本文提出将信息咨询服务作为突破口,推行图书馆服务的市场化,阐述了学科服务市场化的步骤及其困境,并将人力资源管理机制引入高校图书馆。     

高校图书馆数字资源统计系统建设研究

随着资源的数字化程度不断提高,高校图书馆数字资源建设也得到逐步重视。数字资源的真实利用率一直是图书馆管理者所希望得到的数据之一。而数字资源使用率数据一般由数字资源供应商提供,真实性和准确性有待商榷。由于高校图书馆数字资源使用范围有一定的限制性,借助于这个特点,设计与建设数字资源访问统计系统,提供图书馆数字资源使用的真实信息,为图书馆资源建设提供决策基础。本文从图书馆需求入手,引入系统需求和系统技术原理,同时介绍系统实现案例部分内容,指出数字资源统计系统建设的必要性与存在的难题。     

微机串口实时通信的实现

阐述了外部中断在实时通信中的特殊地位以及WINDOWS与DOS在这方面的不同,通过一个典型的范例说明如何利用外部中断实现串口实时通信。     

Collagen-based brain microvasculature model in vitro using three-dimensional printed template

We present an engineered three-dimensional (3D) in vitro brain microvasculature system embedded within the bulk of a collagen matrix. To create a hydrogel template for the functional brain microvascular structure, we fabricated an array of microchannels made of collagen I using microneedles and a 3D printed frame. By culturing mouse brain endothelial cells (bEnd.3) on the luminal surface of cylindrical collagen microchannels, we reconstructed an array of brain microvasculature in vitro with circular cross-sections. We characterized the barrier function of our brain microvasculature by measuring transendothelial permeability of 40 kDa fluorescein isothiocyanate-dextran (Stoke''s radius of ∼4.5 nm), based on an analytical model. The transendothelial permeability decreased significantly over 3 weeks of culture. We also present the disruption of the barrier function with a hyperosmotic mannitol as well as a subsequent recovery over 4 days. Our brain microvasculature model in vitro, consisting of system-in-hydrogel combined with the widely emerging 3D printing technique, can serve as a useful tool not only for fundamental studies associated with blood-brain barrier in physiological and pathological settings but also for pharmaceutical applications.     

Introducing novel approaches for examining the variability of individuals’ physical activity

Tudor-Locke and colleagues previously assessed steps/day for 1 year. The aim of this study was to use this data set to introduce a novel approach for the investigation of whether individual’s physical activity exhibits periodicity fluctuating round a mean and, if so, the degree of fluctuation and whether the mean changes over time. Twenty-three participants wore a pedometer for 365 days, recorded steps/day and whether the day was a workday. Fourier transform of each participant’s daily steps data showed the physical activity had a periodicity of 7 days in half of the participants, matching the periodicity of the workday pattern. Activity level remained stable in half of the participants, decreased in ten participants and increased in two. In conclusion, the 7-day periodicity of activity in half of the participants and correspondence with the workday pattern suggest a social or environmental influence. The novel analytical approach introduced herein allows the determination of the periodicity of activity, the degree of variability in activity that is tolerated during day-to-day life and whether the activity level is stable. Results from the use of these methodologies in larger data sets may enable a more focused approach to the design of interventions that aim to increase activity.     

大学生方程式赛车的发动机牵引力控制与弹射起步研究

基于使FSC赛车能有最佳起步性能表现的目的,采用调节发动机的断油或断火,控制发动机的功率输出,从而控制目标滑移率和目标转速的方法,结合在多组测试数据的多次直线加速试验,得出通过实验数据选择的最优动力方案来限制引擎的功率输出(断油或断火),可以大大提高FSC赛车的起步性能的结论。