农用地膜自然老化与人工老化相关性的研究

[目的]研究分析人工加速光老化与自然气候暴露老化试验两者的相关性.[方法]以乌鲁木齐天山区南端农田自然老化试验田和人工加速光老化试验箱作为检测地膜老化试验手段,对A、B、C三种不同配方的农用地膜进行老化前后力学性能分析,并研究了辐照强度、温度、老化时间对农用地膜老化寿命的影响.[结果]自然老化和人工老化试验都表明B膜抗老化性相对其它2个膜样较好.[结论]人工老化与自然老化拉伸强度和断裂伸长率变化规律非常吻合.说明用340 nm荧光紫外灯辐照度控制在0.68 W/m2、黑板温度为60℃、冷凝温度为60℃、光照3 h、冷凝3 h试验条件下,可模拟出人工加速光老化试验的老化速率是自然气候环境下暴露试验的10倍.     

佳多频振式杀虫灯监测刚竹毒蛾

应用佳多频振式杀虫灯开展刚竹毒蛾成虫监测试验,结果表明:该虫在永安1年发生3代,世代明显,各代成虫历期41～49d,而盛期只有12～16d,羽化时间较为集中。3代成虫夜间活动规律均不相同:无月光夜晚,越冬代和第1代成虫均产生两个明显高峰值,而第2代仅出现1个高峰期;在有月光的条件下,越冬代成虫亦只形成1个显著的高峰。     

The influence of fluorescent lamps with different color temperatures and luminance levels on discrimination

Short-term memory measurement is an important method to determine study fatigue as it pertains to learning outcome. This project examines the impact of classroom-lighting on circadian rhythm. A learning-recognition model using two-character Chinese word cards formed the basis of this study. Utilizing the discriminating ability in Signal Detection Theory as an index, students’ brain fag (mental exhaustion and fatigue), short-term memory and recognition ability are tested and analyzed. The subjects are placed under T5 fluorescent lamps of 3 typical colour temperatures and with 4 luminance levels. Within a certain length of time, students’ brain fag and recognition ability of short-term memory differs under different spectrum conditions and luminance levels. Low colour temperature and low luminance has a wake-up effect that improves short-term memory. Medium colour temperature is the optimum that can keep brain function appropriately excited. Under high luminance level, brain fag is more serious and learning efficiency is lower. Brain fatigue is most pronounced under high colour temperature. Obviously longer exposure time to the Chinese characters will result in higher recognition ability. This study has important implications in how to improve learning through properly designed lighting conditions.     

保育猪舍三种局部供暖措施效果比较研究

为探讨不同局部供暖措施对保育猪局部热环境的影响及其在不同高度上的温湿度变化,对电地暖供暖、红外保温灯供暖和顶板电热板供暖三种局部供暖状况进行了对比分析.试验分析了三种局部供暖所在区域1.0 m高处的温湿度情况和每种局部供暖不同高度(地面、0.3 m、0.7 m和1.1 m)的温湿度变化情况.结果表明,在猪舍整体环境CO...     

建筑照明节能设计的探讨

作者提出了电气节能设计中照明节能设计的必要性,从照明节能光源、高效灯具的选择、建筑电气设计、照明控制等方面,阐述了如何实现照明节能设计的新理念.     

补光光源对AM真菌生长发育的影响

温室条件下,研究不同补光光源对丛枝菌根(Arbuscular mycorrhizae,AM)真菌Glomus mosseae生长发育的影响。结果表明：不同补光光源的光谱不同,对菌根共生体生长发育的影响不同,以农艺钠灯作为补光光源处理的宿主植物的光合速率及可溶性糖含量高于其它两种光源处理,综合比较菌根长度、根外菌丝量及孢子数三项指标,以农艺钠灯作为补充光源对真菌G. mosseae的生长发育最为有利。金属卤灯、荧光灯两处理宿主植物中氮、磷浓度高于农艺钠灯处理,可能对菌根真菌的生长发育有不利影响。因此,工厂化AM菌剂生产中,如果需要补充光照,应以农艺钠灯作为补光光源。     

Productivity and Physiological Response of Students Subjected to Fluorescent Lamps With Different Colour Temperatures and Luminance Level〖JP〗

The influence of luminance level on students’ productivity, asthenopia (an eye strain), and brainfag (a mental exhaustion and depressive disorder) was studied with three typical colour temperatures of T5 fluorescent lamps. The changing rate of productivity and asthenopia were measured by using anomalistic distance determination and Анфимов alphabet test method and the changing rate of productivity was regarded as the brainfag index. It is found that medium colour temperature fluorescent lamps with appropriate exposure time can produce desirable consequences, stimulate the subjects’ cognitive ability and enhance their productivity. However, some lamps with lower or higher colour temperature produced undesirable consequences. The optimal luminances levels were thus variable and correspond to the colour temperature of lamps. The worst combination of colour temperature & luminance was identifies and should be avoided in classroom lighting design.     

黄光灯矩阵灯光防治棉田盲蝽效果研究

黄光灯矩阵灯光防治棉田盲蝽效果研究结果表明,矩阵黄光灯诱杀到6种盲蝽,诱杀效果高于原色灯对照2.86倍,提升黄光单灯诱杀效果2.70倍;与原色灯相比,棉盲蝽发生时间减少50%,虫口量减少4头/百株,棉幼蕾被害率减少0.75倍,与农药常规防治相比,棉盲蝽发生时间减少25%,虫口量减少4头/百株,棉幼蕾被害率减少0.41倍,表明矩阵黄色光具棉盲蝽防治专用性特点和避免误杀其他有益昆虫优势。