Prediction of water temperature heterogeneity of braided rivers using very high resolution thermal infrared (TIR) images

Braided rivers exhibit high spatial thermal heterogeneity that is difficult to understand using only in situ measurements. In this summer study, we used a drone and a powered paraglider to acquire very high spatial resolution (14–27 cm) thermal infrared (TIR) images of nine braided reaches located in the French Alps. We applied atmospheric corrections to TIR images and calibrated them based on in situ data. To characterize spatial and temporal thermal patterns, three temporal approaches were applied. A single survey of each site was performed to comparatively explore the nine braided reaches. Three reaches were imaged twice, in 2010 and 2011, to explore inter-annual variability. Finally, two reaches were selected for an intra-day survey for which four and three flights, respectively, were realized within one day. We reported two types of thermal patterns in braided reaches, the first showing very low thermal variability throughout the day. This low variability was linked to the low diversity found in the aquatic habitat, notably due to proglacial regimes with high summer flows which homogenize water temperatures. The second type exhibited a higher thermal variability with changes during the day. The temperature of flowing channels changed during the daytime according to air temperature. In contrast, the temperature of channels downstream connected to the main network exhibited smaller changes, which created thermal variability over space and time associated with hyporheic or phreatic flows. Non-proglacial and proglacial reaches behaved differently according to air temperature. Proglacial reaches were colder and less sensitive to air temperature in comparison with non-proglacial reaches. These findings allow for a prediction of habitat diversity from temperature heterogeneity based on time and the proportion of ponds, alluvial, and groundwater channels.     

管带式热交换器真空钎焊工艺及影响钎焊质量的因素

主要介绍了铝热交换真空钎焊工艺，铝及铝合金真空钎焊的去膜机理，管带式热交换器常用材料和制造工艺。并结合本公司的生产实际情况，详细探讨了影响真空钎焊质量的因素。     

The use of two-dimensional electrophoresis in the characterization of the water-soluble protein fraction of commercial flat fish species

 The water-soluble proteins of nine flat fish species of high commercial value, belonging to the Pleuronectidae, Scophtalmidae, and Soleidae families, were analyzed by two-dimensional (2D) electrophoresis, this being carried out by nondenaturing isoelectric focusing (IEF) in the 3.5–9.5 pH range and gradient SDS-PAGE in the 12–14% range. Most of the major proteins fell in the 3.5–6.9 pH range. From these, the most specific proteins were in the acidic fraction (pI<5.2; MW<16 kDa). Species-specific 2D protein patterns were observed in all the nine species, and more than 25 proteins could be individualized. The combination of nondenaturing IEF and gradient SDS-PAGE, both in the absence of urea, allowed detailed characterization of both the isoelectric points and molecular weights of the major water-soluble proteins and proved to be a valuable tool for the differential characterization of the flat fish species studied.     

铅、银对活性碳分离富集-原子吸收法测金的干扰及消除

本文针对电鲜阳极泥、冰铜、铅、锌精矿、炉砖四种含金样品中铅银对活性碳富集－AAS测Au的干扰，提出了消除干扰的具体措施，提高了分析结果的准确性。     

注射模浇口切断结构设计

对注射模的二次顶出机构和浇口设计进行分析,以塑料圆环注射模为例,介绍一种带有二次顶出机构和流道推板的浇口切断结构。该结构实现了塑件与流道凝料的自动分开,减少注射生产过程中修剪流道凝料的工序,减轻工人劳动强度,提高了注射生产的自动化程度和生产效率。     

钙铁锌复合强化食醋的研究

本文对钙铁锌复合强化陈醋进行初步研究。结果表明，适宜的钙强化剂为氯化钙和醋酸钙；适宜的铁强化剂为柠檬酸铁铵和乳酸亚铁；多种锌强化剂适合陈醋的锌强化。氯化钙、柠檬酸铁铵和氯化锌对陈醋进行钙铁锌复合强化，可取得较好的效果，此时其强化量分别咪100mgCa/100ml,25mgFe/100ml和40mgZn/100ml陈醋。     

Parametric investigation on anhydrous sodium metaborate (NaBO2) synthesis from concentrated tincal

In this study, anhydrous sodium metaborate (NaBO₂), an industrial and technologically important boron compound, synthesis from concentrated tincal (CT) was carried out. Experiments with different temperature and time were performed in the parametric investigation to map out the reaction mechanism. Crystalline phase characterization of metaborates products indicates that anhydrous NaBO₂ synthesis from CT occurred at 400 °C with 5 h of reaction conditions. At the end of synthesis, the obtained anhydrous NaBO₂ product can be used in many fields without having the calcination step due to the advantages of this method.     

锚杆检测技术在某水电工程中的应用

贵阳勘测设计院工程物探测试分院利用物探检测方法对某水电站工程锚杆施工质量进行检测，是通过已知模拟锚杆测试、未知模拟锚杆考核到实际工程锚杆考核合格后确定的。本文详细介绍了锚杆检测技术的原理和计算方法，并通过实例阐述了该方法的可靠性及其实际效果。     

对炼油厂H2S气体检测防护的探讨

介绍了H2S气体的性状和危害，对其泄漏的可能性以及相关的预防措施进行了分析。探讨了近年来H2S检测原理的更新及特点，对比了国内外的各种有毒气体的监控方式，并对气体泄漏后的处理以及有毒气体防护的管理进行了分析，探讨切实可行的防护方法。     

岳阳市农业节水灌溉示范页目设计探讨

节水灌溉是调整农业产业结构,实现水土资源合理利用,改善生态环境,促进当地经济发展和增产增收的重要举措.文章介绍了新墙镇示范区的农业节水灌溉设计,力求以点带面,发挥示范作用,从而推进岳阳市农业节水灌溉事业的发展.