Computation Method and for Thermal Transmittance of Glass Curtain walls Appllcation     

Lei Ke  Wu Jie  Zhang Qilin  Pang Shaohua 《保鲜与加工》2013,(2):66-72

The heat conduction characteristic of glass curtain wall was investigated. Based on one dimensional steady heat conduction theory, the numerical calculation model of glass system thermal transmittance was set up by using insulating glass as an example. Based on two dimensional steady heat conduction theory and finite element method, both the thermal transfer matrix and temperature load array of 3 DOFs triangular element were derived. Then the revised formulas about the heat transfer matrix and temperature load array under the boundary conditions of constant heat flux, heat convective, radiation and coupled of them were also derived. Then the numerical calculation models of glass curtain wall frame and linear thermal transmittance were set up. The program TJCW based on the Visual C++ and ObjectARX was developed for calculating the thermal transmittance of glass curtain wall and was validated by contrast with the results calculated by thermal software LBNL. Finally, TJCW program was used to calculate and check the thermal transmittance of glass curtain wall in a practical project. The results indicate that the thermal transmittance of glass curtain wall can be calculated correctly by adopting the presented model, and the program based on this model can be used in energy conservation calculation and analysis in the actual projects.  相似文献   

泡沫玻璃节能装饰复合墙体动态传热特性研究     

姜硕  吕留根  王珊美  赵子文  杨飞鸿  陈佳琦  余露露  魏明辉 《绿色科技》2019,(6):155-156,160

指出了常见的泡沫玻璃复合墙体有粘锚式和干挂式两种,建立了两种泡沫玻璃复合墙体的传热计算模型,计算了其传热特性,并对非稳态工况下两种复合墙体的传热特性进行了研究,得出了相应的结论。  相似文献   

Movement behaviour of large female yellow European eel (Anguilla anguilla L.) in a freshwater polder area          下载免费PDF全文

Pieterjan Verhelst  Jan Reubens  Ine Pauwels  David Buysse  Bart Aelterman  Stijn Van Hoey  Peter Goethals  Tom Moens  Johan Coeck  Ans Mouton 《Ecology of Freshwater Fish》2018,27(1):471-480

Due to a recruitment decline of more than 90% in 30 years, the European eel (Anguilla anguilla L.) has been classified by IUCN as critically endangered. Although the species has been studied intensively to obtain knowledge to improve management, studies about the resident yellow stage are relatively scarce. In this study, 52 large female yellow eels were tagged with acoustic transmitters in a Belgian polder system and tracked by a network of 23 automatic listening stations. We studied both circadian and seasonal movement patterns and the effect of environmental variables on these patterns. Large female yellow eels were most active at night in late summer and early autumn. A generalised linear mixed model showed that their movement is only slightly influenced by environmental variables. Moreover, as yellow eels show high site fidelity (i.e., the majority was detected only in the habitat type of their catch‐release location), they do not encounter many human‐induced connectivity problems in polder systems, which makes these systems highly suitable as eel growth habitat. These results can contribute to an effective eel management regarding habitat protection and restoration.  相似文献   

Behaviour of endangered European eels in proximity to a dam during downstream migration: Novel insights using high accuracy 3D acoustic telemetry     

Thomas Trancart  Alexandre Carpentier  Anthony Acou  Valentin Danet  Sophie Elliott  Éric Feunteun 《Ecology of Freshwater Fish》2020,29(2):266-279

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Clinical features of canine pulmonary veno‐occlusive disease and pulmonary capillary hemangiomatosis     

Carol R. Reinero  L. Ari Jutkowitz  Nathan Nelson  Isabelle Masseau  Samuel Jennings  Kurt Williams 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2019,33(1):114-123

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益生素在欧鳗养殖中的应用试验   总被引：1，自引：1，他引：0  

曹建民  胡玫 《兽药与饲料添加剂》1999,4(3):6-7

在欧鳗日粮中添加2‰益生素饲料添加剂,其增重率试验组比空白对照组高出9个百分点,饲料效率试验组比空白对照组高出7个百分点。  相似文献   

甲胺磷、90-消毒剂对欧洲鳗仔鳗的急性毒性作用     

房迎春  廖城珍  潘连德 《水产科技情报》1999,26(4):155-158

采用静水实验法进行甲胺磷乳剂,９０－消毒剂对欧洲鳗仔鳗急性毒性试验研究。结果表明：在试验浓度３２－５６ｍｇ／Ｌ范围内,欧洲鳗仔鳗中毒死亡发生在３０－４４ｈ,对甲胺磷乳剂急性中毒死亡的时间集中且持续短促;甲胺磷乳剂对欧洲鳗仔鳗的半致死浓度为３５．９ｍｇ／Ｌ,安全浓度为３．６ｍｇ／Ｌ。  相似文献   

玻璃化转变温度对层压板性能的影响     

刘涛 《浙江林学院学报》1999,16(3):297-302

探求层压板的玻璃化转变温度（ｔｇ）对层压板性能的影响,对研制开发层压板新产品和选择适用层压板制作印刷电路板有重要的理论意义和实际意义。对不同ｔｇ的层压板的耐热性、抗弯强度和热膨胀性等８项性能进行了比较。结果表明层压板的ｔｇ升高,层压板的机械和电气性能明显提高。  相似文献   

First identification and characterization of Tenacibaculum dicentrarchi isolated from Chilean red conger eel (Genypterus chilensis,Guichenot 1848)          下载免费PDF全文

R Irgang  R González‐Luna  J Gutiérrez  M Poblete‐Morales  V Rojas  D Tapia‐Cammas  R Avendaño‐Herrera 《Journal of fish diseases》2017,40(12):1915-1920

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Anthropogenic spreading of anguillid herpesvirus 1 by stocking of infected farmed European eels,Anguilla anguilla (L.), in the Schlei fjord in northern Germany          下载免费PDF全文

B Kullmann  M Adamek  D Steinhagen  R Thiel 《Journal of fish diseases》2017,40(11):1695-1706

The Schlei fjord in northern Germany is the recipient water of a comprehensive eel, Anguilla anguilla (L.), stocking programme. Since 2015, stocked eels become alizarin red S marked, but to date no control mechanism is implemented in this stock enhancement measure to prevent anthropogenic spreading of diseases. Consequentially, it was possible that farmed stocking cohorts of 2015 and 2016 (in total ca. 1040 kg) were subsequently tested positive for anguillid herpesvirus 1 (AngHV 1). For this study, 100 eels [total length (TL) 24.3–72.9 cm, age ca. 1–6 years] were caught in 2016 and investigated with regard to AngHV 1 infection, parasite load (Anguillicoloides crassus) and body conditions. 68% of the eels were found to be virus positive while larger specimens were more often infected. In addition, a fitted generalized linear model (area under the curve = 0.741) demonstrated that an increase in individual TL is accompanied with an increased risk of clinically relevant virus loads. Anguillicoloides crassus turned out to be an important stressor for eels, because parasite and virus load revealed a significant positive correlation. The results of this study evidently show the urgent need of a disease containment strategy for eel stocking programmes.  相似文献