地铁施工对周围建筑物的防护技术

通过广州地铁公纪区间隧道施工实例，分析了施工对周围建筑物的影响，介绍了对地表建筑物的防护措施以及监控手段。     

烘房汽车油漆固化流程模拟

缓解这些担忧,需要找到方法能精确预测烘房里车身的温度.全球领先的涂装系统供应商杜尔(D ürr Systems)采用计算机流体动力学(CFD)模拟技术,能完全模拟汽车的烘房.经过几年的开发,杜尔已能对实车进行完整的烘烤模拟,并具有相当好的精确度. 计算机烘房模拟是通过商业化的CFD软件、ANSYS FLUENT和杜尔自主开发的用户自定义功能(UDF)代码来进行的.CFD模拟不仅能检索到车身上任何一点的温度-时间曲线,用于油漆固化评估,还能在烘房里提供一个可见的数字化气流和温度场,以便工程师能在生产制造前改进设计.与实验室的烘房测试相比,CFD模拟不需要有真正的烘房和样车,而且可以在车辆设计的早期进行.这就使制造商有机会完善用于生产的新车身设计,并在新车型发布前有更多的时间改进现有的烘房.     

车坛新霸主冉冉升起阿隆索无敌

F1是非常尖端又异常脆弱的一项运动，车队与车手之间强弱变化非常微妙，谁能领先一点点不容易，要靠全队上下齐心协力长期不懈的努力，保持领先优势就更加困难。但是一支车队失去优势因素众多，而且防不胜不胜防，简单就象吹口气一样无影无踪。可要想挽回损失却难上加难，必须再次经过长时间努力，还要遇到合适的机会 。     

Analysis of chiral non-steroidal anti-inflammatory drugs flurbiprofen, ketoprofen and etodolac binding with HSA

The protein binding of non-steroidal anti-inflammatory drugs flurbiprofen, ketoprofen and etodolac with human serum albumin （HSA） was investigated using indirect chiral high performance liquid chromatography （HPLC） and ultrafiltration techniques. S-（-）-1-（1-naphthyl）- ethylamine （S-NEA） was utilized as chiral derivatization reagent and pre-column derivatization RP-HPLC method was established for the separation and assay of the three pairs of enantiomer. The method had good linear relationship over the investigated concentration range without interference. The average extraction efficiency was higher than 85% in different systems, and the intra-day and inter-day precisions were less than 15%. In serum albumin, the protein binding of etodolac enantiomers showed significant stereoselectivity that the affinity of S-enantiomer was stronger than R-enantiomer, and the stereoselectivity ratio reached 6.06; Flurbiprofen had only weak stereoselectivity in HSA, and ketoprofen had no stereoselectivity at all. Scatchard curves showed that all the three chiral drugs had two types of binding sites in HSA.     

Implementation of Heat Treatment Process Simulation with Object-Oriented Method

IntroductionDuringheatingorcoolingprocess,metallicmaterialsundergotheevoluhonsoftemPeraturefield,phasecompositionsandstrCssfield.ThereexistseveralinteaCtionsl1-4](couPlingeffeCts)betWeenthesephenomena.TodescribeallthesephysicalprocessescorrecUyandefficientiy,thefiniteelementmethodisoftenadoPtedll'5'6].Asitiswellknown,conventionalfiniteelementanalysisprogramsarecomplicatCdanderror-Prone.ComPlexcontrolanddatastructuresassociatedwithsoftwaretendtOobscurefundamerealintenhons,maldngdevelopmen…     

Fluorescent Property of Triethylene-glycol Di （ 7-（ N, N＇-diethylamino） ）-Coumarin- 3-Carboxylate

Coumarines have been recently paid much attention for their physiological activities and fluorescent properties. They have outstanding optical properties, including high photostability, extended spectral range, high quantum yield of photoluminescence.     

氧传感器在电控汽车故障诊断中的应用

介绍了氧传感器的结构类型和功用,并对氧传感器的工作特性进行了简要分析。对氧传感器引起的故障进行了原因分析。结合实例利用动态数据流功能对电控汽车的氧传感器的工作特性出现异常进行了诊断和分析。