云环境下数字档案馆资源的管理过程研究

云计算技术的发展,为数字档案馆资源共享、管理和服务提供了新的路径。本文阐释了云环境下的数字档案馆资源管理的概念、特点以及管理过程和管理策略。     

电力系统通信电源设备阀控式铅酸蓄电池的状态检测与维护

针对阀控式密封铅酸蓄电池的渐变失效性,提出了目前常用的一些检测方法、日常维护及存在的问题,旨在分析存在的问题并进行矫正,为实际工作提供借鉴．     

基于云计算的数字档案馆建设研究

本文在阐明云计算概念和关于云计算近期研究的基础上,论述了云计算在数字档案馆中的应用优势,提出了基于云计算的高校数字档案馆建设模型。针对云计算技术应用过程中出现的问题,提出了解决问题的对策。     

云计算与数字资源存储问题分析

云计算技术目前已在一些商业领域中得到了初步的应用.本文探讨了云计算的相关概论,云计算技术在图书馆中的应用带来的便利,以及在应用过程中带来的瓶颈问题.     

云计算在高校图书馆应用中的机遇与挑战

在分析云计算的概念、内涵的基础上,本文重点探讨了云计算给高校图书馆带来的一些机遇,结合高校图书馆实际,分析了高校图书馆应用云计算技术面临的挑战。     

论云计算的发展及应用

本文简单介绍了云计算的概念、任务、云计算的发展方向、云计算存在的网络带宽限制、计算能力问题及、数据安全问题。     

Fluid ingestion and exercise hyperthermia: Implications for performance,thermoregulation, metabolism and the development of fatigue

The development of fatigue during exercise and the subsequent onset of exhaustion occur earlier in the heat than in cooler environments. The underlying mechanisms responsible for the premature development of fatigue in the heat have yet to be clearly identified. However, the proposed mechanisms include metabolic, cardiovascular and central nervous system perturbations, together with an elevated core temperature. Fluid ingestion is one of three strategies that have been shown to be successful in enhancing the performance of endurance exercise in the heat, with the other interventions being precooling and acclimatization. However, like the development of fatigue in the heat, the mechanisms by which fluid ingestion allows for improved exercise performance remain unclear. We propose that fluid ingestion enhances exercise performance in the heat by increasing the heat storage capacity of the body. We suggest that the thermoregulatory, metabolic and cardiovascular alterations that occur as a result of this increased heat storage capacity contribute to performance enhancement when fluid is ingested during exercise heat stress.     

Thermoregulatory responses during prolonged upper body exercise in cool and warm conditions

The thermoregulatory responses of upper-body trained athletes were examined at rest, during prolonged arm crank exercise and recovery in cool (21.5 ± 0.9°C, 43.9 ± 10.1% relative humidity; mean ± s) and warm (31.5 &± 0.6°C, 48.9 - 8.4% relative humidity) conditions. Aural temperature increased from rest by 0.7 ± 0.7°C (P ? 0.05) during exercise in cool conditions and by 1.6 ± 0.7°C during exercise in warm conditions (P ? 0.05). During exercise in cool conditions, calf skin temperature decreased (1.5 ± 1.3°C), whereas an increase was observed during exercise in warm conditions (3.0 ± 1.7°C). Lower-body skin temperatures tended to increase by greater amounts than upper-body skin temperatures during exercise in warm conditions. No differences were observed in blood lactate, heart rate or respiratory exchange ratio responses between conditions. Perceived exertion at 45 min of exercise was greater than that reported at 5 min of exercise during the cool trial (P ? 0.05), whereas during exercise in the warm trial the rating of perceived exertion increased from initial values by 30 min (P ? 0.05). Heat storage, body mass losses and fluid consumption were greater during exercise in warm conditions (7.06 ± 2.25 J·g^-1 ·°C^-1, 1.3 ± 0.5 kg and 1038 ± 356 ml, respectively) than in cool conditions (1.35 ± 0.23 J·g^-1·°C^-1, 0.8 ± 0.2 kg and 530 ± 284 ml, respectively; P ? 0.05). The results of this study indicate that the increasing thermal strain with constant thermal stress in warm conditions is due to heat storage within the lower body. These results may aid in understanding thermoregulatory control mechanisms of populations with a thermoregulatory dysfunction, such as those with spinal cord injuries.     

Improving K-12 pedagogy via a Cloud designed for education

Cloud computing offers an opportunity to improve K-12 pedagogy with services tailored to teachers’ needs in individual classrooms. The Cloud can deliver services such as remote access to learning tools in a cost effective manner to school systems struggling with reductions in local and state funding. This article explores the distinct ways that a Cloud designed specifically for education can be applied to K-12 education's academic mission. It uses observations from a case study in North Carolina rural high schools using an educational Cloud called the Virtual Computing Lab to access dynamic geometry and algebra software.     

面向高职教育的智慧课堂“云+端”平台的搭建--以“中药鉴定学”课程为例

智慧课堂作为现代信息技术与教育深度融合的新形态,该文以"中药鉴定学"课程为例,分析了针对高等职业教育特点,如何优化平台功能,搭建适于高职教育的智慧课堂"云+端"平台。