计算机数据采集的风扇试验装置研制

本文介绍了一种采用传感器技术与计算机数据采集的风冷柴油机风扇试验台架 .该台架不但能完成风扇性能试验的各试验数据的自动采集 ,而且具备对所测试的数据进行数值处理与数据库管理功能 .通过与传统的风扇试验台架进行试验对比表明 ,该台架精度高 ,测试效果好 ,达到了设计的要求 .     

The Four (or Five?... or Six?... or Seven?...) Children’s Books of Graham Greene

An account of the publishing history of four picturebooks with texts by the major 20th century British author, Graham Greene, and illustrations by Dorothy Craigie and, later, by Edward Ardizzone. concluding section questions whether the texts of three other books, nominally by Dorothy—or “David”—Craigie, ought more accurately to be ascribed to Graham Greene. Brian Alderson is a distinguished critic, bibliographer and author of children's books. He has curated many exhibitions and is involved in sundry organisations, such as the Beatrix Potter Society and the Children's Books History Society. He is children's book consultant to The Times Newspaper. He lives in Richmond, North Yorkshire, in the United Kingdom.     

三维引擎中人体动画的研究

针对项目中对三维引擎的要求对骨骼动画进行了研究。提出了一种实现动画共享的方法,通过运用顶点索引法,大大降低了运算量。结果证明,所用的方法有良好的准确性和较好的实时性。     

以昂尼斯气体为工质的斯特林热机循环效率

以昂尼斯气体为工质,推导出斯特林热机循环的回热损失、输出功及效率的表达式.经过验证,以理想气体、范德瓦尔斯气体、Redlich-Kwong气体和Dieterici气体为工质时,斯特林循环的回热损失、输出功及效率均可由以昂尼斯气体为工质时的形式得出.     

The influence of serial feeding of drinks at different temperatures on thermoregulatory responses during cycling

Abstract

In this study, we examined thermoregulatory responses to ingestion of separate aliquots of drinks at different temperatures during low-intensity exercise in conditions of moderate heat stress. Eight men cycled at 50% (s = 3) of their peak oxygen uptake ([Vdot]O_2peak) for 90 min (dry bulb temperature: 25.3°C, s = 0.5; relative humidity: 60%, s = 5). Four 400-ml aliquots of flavoured water at 10°C (cold), 37°C (warm) or 50°C (hot) were ingested after 30, 45, 60, and 75 min of exercise. Immediately after the 90 min of exercise, participants cycled at 95%[Vdot]O_2peak to exhaustion to assess exercise capacity. There were no differences between trials in rectal temperature at the end of the 90 min of exercise (cold: 38.11°C, s = 0.30; warm: 38.10°C, s = 0.33; hot: 38.21°C, s = 0.30; P = 0.765). Mean skin temperature between 30 and 90 min tended to be influenced by drink temperature (cold: 34.49°C, s = 0.64; warm: 34.53°C, s = 0.69; hot: 34.71°C, s = 0.48; P = 0.091). Mean heart rate from 30 to 90 min was higher in the hot trial (129 beats · min^?1, s = 7; P < 0.05) than on the cold (124 beats · min^?1, s = 9) and warm trials (126 beats · min^?1, s = 8). Ratings of thermal sensation were higher on the hot trial than on the cold trial at 35 and 50 min (P < 0.05). Exercise capacity was similar between trials (P = 0.963). The heat load and debt induced by periodic drinking resulted in similar body temperatures during low-intensity exercise in conditions of moderate heat stress due to appropriate thermoregulatory reflexes.     

智能搜索引擎在数字图书馆中的应用

随着互联网络的发展以及现代科学技术的不断创新,传统搜索引擎已经不能适应时代的需要,如何有效地利用智能搜索引擎,特别是将它应用于数字图书馆中是我们面临的重要问题。     

祛银方联合雷公藤多甙片治疗寻常型银屑病疗效观察

目的:观察祛银方联合雷公藤多甙片治疗寻常型银屑病临床疗效及安全性。方法:74例寻常型银屑病血热证患者随机分为祛银方联合雷公藤多甙片治疗组和雷公藤多甙片对照组。治疗4周后,评价治疗前后患者临床疗效、生活质量指数(DLQI)评分、中医临床症候症状等方面的改变,同时观察不良反应。结果:治疗后治疗组、对照组临床总有效率分别为87%、73%;两组生活质量指数(DLQI)均低于治疗前(P0.01),治疗后两组的DLQI评分有显著性差异(P0.01);治疗组中医症候均有显著性差异(P0.01);对照组除瘙痒症候治疗有显著性差异外(P0.01),余均无显著性差异(P0.05)。结论:祛银方联合雷公藤多甙片治疗寻常型银屑病具有良好的临床效果,尤其在改善中医症状如瘙痒、口渴等方面效果显著,能有效减轻雷公藤的毒副作用,起到减毒增效的作用。     

亚温淬火对T217钢性能的影响

通过对亚共析钢T217钢分别采取淬火＋回火和淬火＋亚温淬火＋回火处理,探讨这两种工艺和亚温淬火的温度和保温时间对亚共析钢T217钢性能的影响,最后找出T217钢最佳亚温淬火热处理工艺。本文对于T217钢类似的钢种亚温淬火热处理工艺的制定具有一定的指导意义。     

运动影响免疫细胞机能的热休克蛋白途径

作为交感—肾上腺皮质/髓质系统等传统应激信号系统以外的信号分子,热休克蛋白在免疫机能调节中发挥重要的作用。本文从细胞信号传导的角度,综述热休克蛋白在运动应激下免疫机能的反应和适应过程中的作用。     

有氧训练及热应激对运动大鼠肾脏组织NO、NOS及自由基代谢的影响

目的：探讨有氧耐力训练对运动热应激大鼠肾脏组织NO、NOS及自由基代谢的影响。方法：对大鼠进行为期6w的递增负荷运动训练,并在运动末次施加热应激,测定大鼠肾脏组织NO、NOS、MDA和SOD含量或活性。结果：（1）运动加热应激使大鼠肾脏组织NO、NOS、iNOS和MDA显著高于安静组和急性运动组,SOD和SOD／MDA显著低于安静组和急性运动组;（2）训练安静组与安静对照组相比,MDA均显著下降,NO、NOS均显著上升;（3）训练后运动热应激大鼠肾脏组织NO、NOS、iNOS、MDA显著下降,SOD显著上升。结论：（1）在热环境下运动,机体NO、NOS和自由基代谢增加,抗氧化酶活性下降;（2）在常温下进行有氧耐力训练练,可以适当提高机体的耐热性,降低运动热应激对机体的损伤。