综合性医院电气设计浅析

本文结合具体的工程,对综合性医院电气设计的特点进行归纳和总结,主要从电源的可靠性、人的安全性和照明的舒适性3个方面来阐述和探讨,并交流了笔者的设计体会。     

刨花模压工业托盘的特点及主要物理力学性能

托盘是货物储运应用极其广泛的产品,用低质木质材料资源如小径木及其加工剩余物为原料,经高温高压并用环保型的、对人体无毒害的树脂生产出模压刨花托盘,可替代实木托盘.模压刨花托盘重量只有实木托盘的50 %.主要介绍刨花模压工业托盘的尺寸、吸水膨胀率、吸水率、托盘密度、托盘抗弯强度、支脚抗压强度和加强筋抗压强度等主要物理力学性能.     

免防腐耐候钢的焊接性分析与研究

常规输电线路铁塔焊接加工后需要采用热浸镀锌工艺进行防腐处理,文中所谓的耐候钢是焊接加工后不进行做任何处理,该钢在大气腐蚀下产生氧化膜,且耐候结构钢的使用时间越长,其氧化膜越厚,耐腐蚀性能越强。通过对免防腐耐候钢焊接性分析,选择与之匹配的焊接材料,对耐候钢与不同钢种间焊接接头进行了低温抗裂性、力学性能、耐大气腐蚀性能和焊接工艺性等试验,得出适合耐候钢焊接的工艺,提出了防止耐候钢焊接冷、热裂纹的处理措施,确定了耐腐蚀的焊接材料、焊接主要参数及道间温度最高值,保证了焊缝的耐腐蚀性能。     

刨花模压工业托盘的特点及主要物理力学性能

托盘是货物储运应用极其广泛的产品，用低质木质材料资源如小径木及其加工剩余物为原料。经高温高压并用环保型的、对人体无毒害的树脂生产出模压刨花托盘，可替代实木托盘。模压刨花托盘重量只有实木托盘的50％。主要介绍刨花模压工业托盘的尺寸、吸水膨胀率、吸水率、托盘密度、托盘抗弯强度、支脚抗压强度和加强筋抗压强度等主要物理力学性能。     

3种食品天然植物包材的抗氧化活性成分对比研究

The antioxidant components and antioxidant functions of three commonly used natural food packaging materials, including Indocalamus leaves, reed leaves and lotus leaves were investigated. The active components were extracted by ultrasonic extraction. The contents of total phenols and total flavonoids, the hydroxyl radical scavenging activity, superoxide radicals scavenging activity, DPPH free radical scavenging activity, ABTS+ free radical scavenging activity, total antioxidant activity and reducing power of plant extracts were determined. The relation between antioxidant functions and antioxidant active ingredients was tested. The results indicated that the contents of total phenols and total flavonoids in lotus leave were higher than these of Indocalamus leaves and reed leaves, and the difference was significant (P<0.05). The total phenol content of three plants was extremely significantly correlated with the hydroxyl radical scavenging activity, superoxide radicals scavenging activity, DPPH radical scavenging activity, ABTS+ scavenging activity, total antioxidant and reducing power (P<0.01). The total flavonoid content was extremely significantly correlated with the total antioxidant and reducing power (P<0.01), and significantly correlated with the ABTS+ free radical scavenging ability (P<0.05). The content of isoquercitrin was high in Indocalamus leaves, and reed leaves and the content of luteolin-6-c-glucoside was high in reed leaves and lotus leaves. These ingredients contained the 4-carbonyl group, 2, 3-double bond and o-dihydroxy group of B ring. In summary, Indocalamus leaf, reed leaf and lotus leaf contained many kinds of polyphenols, which have strong free radicals scavenging activity and other antioxidant function.     

浅谈煤矿机械设备自动化技术应用

机械自动化是目前先进科学技术的核心和工业现代化的标志。由于煤炭行业具有自身的特殊性,煤炭是不可再生资源,每个煤矿的地质状况等条件不尽相同,其开采工作是一个系统的工程。阳煤集团的煤矿机械设备在不断提升产品性能和质量的同时,与自动化技术的结合越来越紧密。本文拟从以下几个方面进行分析,浅析在矿机械行业内关于自动化技术的应用。     

人工智能背景下计算机专业职业教育发展探究

人工智能的发展已经成为我国国家战略与未来趋势。面对人工智能发展的浪潮与需求,职业教育应主动变革,人工智能时代的到来为计算机专业提供了新的发展空间。本文主要是对人工智能时代下计算机专业职业教育改革进行了研究,各职业院校则应主动对接人工智能需求,改革师资、教学等模式与内容。     

特高压高颈法兰焊接技术

高颈法兰是一项新的焊接结构形式,对提高钢管塔加工产能以及产品质量起到了至关重要的作用。如何保证焊接质量及焊接效率成为一大技术难题,文中简要介绍了特高压高颈法兰的结构形式及焊接技术。这种结构形式及文中推荐的3种焊接工艺的应用使产品总体质量较好,各项关键质量指标满足钢管塔生产技术要求,但在工艺细节等方面还需固化。     

铁路站台钢雨棚装配式柱脚节点试验研究

铁路客站站台钢结构雨棚面大量广,且标准化程度高,极具大规模推行装配式建造的前景,然而常规的埋入式和外露式柱脚则无法在保证安全的前提下实现雨棚的“零焊接”装配,本文根据雨棚柱脚的受力特点,提出了采用预应力锚栓外露式柱脚的可能性,并对柱脚节点开展了低周往复足尺试验,结果表明通过对锚栓施加合适的预拉力,可以使柱脚底板在罕遇地震下不发生消压,且柱脚不发生滑移,从而得到较好的刚度和强度。鉴于该柱脚良好的安全性和可装配性,认为其可用于铁路站钢结构雨棚装配式建造,并提出设计建议。