西安犬展

、了l、﹃"八叶气才乃价,了尹八刁‘今﹄︶、以一甘西安犬展@王然 @西安宠秀~~     

竹浆纤维抗菌性研究

采用抑菌环与AATCC100法对竹浆纤维及其织物的抗菌性进行实验,结果显示未经处理的竹浆纤维中存在抗菌物质,具有良好的抑菌效果;但竹浆织物和经过95%酒精浸泡过的纤维无抗菌性能表现。分析表明抗菌物质不属于纤维组成成分,竹浆纤维自身无抗菌性。     

赛场纵横 手把手教你看秀场(下)

鲁迅曾经说过:“这个世界上本来没有路,走的人多了就自然有了路。”于是在犬展的赛场上也出现了这样的路,它或是直线,或是折返,或是绕场一周。走的人和狗多了,这也就成了一条不平凡的路,而变成了一条荣誉之路。     

声学法重建炉内三维温度场的算法概述

为了实现炉内温度场的实时在线监测,基于声学理论构建了数学模型。从算法的角度,将重建算法分为确定性方法和蒙特卡洛法。介绍了最小二乘法、ART算法等几种算法的基本原理,给出了重建三维温度场的基本公式,阐述了重建三维温度场的具体计算步骤。研究表明,这些算法可以用于求解三维温度场重建模型,但其对于不同温度场的适用性和精度还需仿真和实验验证。     

污泥固体停留时间对实时控制生物脱氮SBR中亚硝酸盐积累的影响

In this study,four sequencing batch reactors(SBR),with the sludge retention time(SRT)of 5,10,20 and 40 d,were used to treat domestic wastewater,and the effect of SRT on nitrite accumulation in the biological nitrogen removal SBR was investigated.The real-time control strategy based on online parameters,such as pH,dissolved oxygen(DO)and oxidation reduction potential(ORP),was used to regulate the nitrite accumulation in SBR. The model-based simulation and experimental results showed that with the increase of SRT,longer time was needed to achieve high level of nitritation.In addition,the nitrite accumulation rate(NAR)was higher when the SRT was relatively shorter during a 112-day operation.When the SRT was 5 d,the system was unstable with the mixed liquor suspended solids(MLSS)decreased day after day.When the SRT was 40 d,the nitrification process was significantly inhibited.SRT of 10 to 20 d was more suitable in this study.The real-time control strategy combined with SRT control in SBR is an effective method for biological nitrogen removal via nitrite from wastewater.     

面向多管路的立体流量分配单元研究

为了克服液体系统中的管路流量分配装置对工作环境要求的局限性,提高其鲁棒性,提出了一种面向多管路的立体流量分配单元,该单元在每个出口对应设置一凸轮机构,利用机械控制,实现多支路控制多节点的精确控制.该装置结构稳定,可靠性高,具有良好的推广价值.     

计算机教学跨学科人才培养势在必行

跨学科人才培养是适应现代科学技术发展趋势和社会经济发展需要的一种重要的教育理念与模式,其目的是培养具有复合型的知识、能力和素质的创新型人才。我们从三个方面阐述计算机教学跨学科人才培养的必要性。     

Tunable thermo-optic switch based on fluid-filled photonic crystal fibers

A tunable thermo-optic intensity-modulated switch is investigated theoretically and numerically.It is based on the infiltra-tion of temperature-sensitive mixture liquids into index-guiding photonic crystal fibers(PCFs).The switching function attributes to the thermo-optic effect of the effective refractive index of the cladding.The simulation illustrates that the switch presents a tunable transition point according to the concentration of the mixture liquids,and the on-off switching functionality can be realized within a narrow temperature range of 2 oC.The switches have wide application for innovative all-in-fiber optical communication and logic devices.     

φ650 mm 70Cr3Mo钢支承辊的一种低成本最终热处理工艺参数的制订

对φ650mm 70Cr3Mo支承辊不透烧加热淬火工艺进行了可行性研究,并结合目前国内大量的台车热处理生产设备,提出具体的工艺方法.结果表明,经该工艺热处理后可以达到支承辊外硬里韧及辊身、辊颈不同硬度的目的,而且经济效益好、实用性强.     

降低排烟温度减轻低温腐蚀方法研究

本文探讨了降低锅炉排烟温度,减轻低温腐蚀的有效措施,并提出了采用流化床换热器回收排烟预热的技术方案。