高层建筑疏散计划

1简介发生在高层建筑中的火灾或其他紧急事件给消防部门带来了致命的挑战。许多消防专业人士考虑到商住高层建筑中的大量人员、建筑性质以及典型构造给灭火救援带来了无法接受的风险。实际上,消防部门对于着火层以上的超出消防云梯车救援高度的区域没有太多的办法。所以,如果在这种情况下发生火灾,后果完全取决于建筑内部的安全机制。建筑内部安全机制之一就是制定疏散计划。2什么是高层建筑?大部分建筑规范定义高层建筑为那些建筑高度超过了当地消防云梯车所能达到的高度的建筑。通常认为7层或7层以上的建筑为高层建筑。虽然高层建筑的设计…     

管井降水技术在多种含水介质基坑工程中的应用

结合蚌埠城市中心广场会展中心工程，介绍了管井降水技术在多种含水介质的复杂地质环境下的应用。     

Thermal degradation behavior and gas phase flame‐retardant mechanism of polylactide/PCPP blends

The thermal degradation behavior of the blend based on polylactide (PLA) and poly(1,2‐propanediol 2‐carboxyethyl phenyl phosphinate) (PCPP) was investigated by the thermogravimetric analysis (TGA). Thermal degradation activation energies (E_a) of neat PLA and PLA/15% PCPP blend were calculated via the Flynn–Wall–Ozawa method. The E_a of the blends increased with the addition of PCPP increasing when the conversion was higher than 10%. In addition, the appropriate conversion models for the thermal degradation process of PLA and PLA/15% PCPP were studied via the Criado method. At the same time, the main gaseous decomposition products of PLA and its blend were identified by TGA/infrared spectrometry (TGA–FTIR) analysis. And it revealed that the PCPP improved the flame‐retardant property of PLA via altering the release of the flammable gas and nonflammable gas. Moreover, the PCPP improved the flame‐retardant property of PLA by inhibiting exothermic oxidation reactions in the combustion, which was further proved by pyrolysis–gas chromatography–mass spectrometry analysis. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40480.     

Formation of self-organized Zircaloy-4 oxide nanotubes in organic viscous electrolyte via anodization

This work reports the formation of self-organized Zircaloy-4 (Zr-4) oxide nanotubes in viscous organic ethylene glycol (EG) electrolyte containing a small amount of fluoride salt and deionized (DI) water via an electrochemical anodization. The structure, morphology, and composition of the Zr-4 oxide nanotubes were studied using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), EDX, and XPS. SEM results showed that the length of the nanotubes is approximately 13 μm, and TEM results showed that the inner diameter of the Zr-4 oxide nanotubes is approximately 20 nm with average wall thickness of approximately 7 nm. XRD and selected area electron diffraction pattern (SAED) results confirmed that the as-anodized Zr-4 oxide nanotubes have cubic crystalline structure. Both cubic and monoclinic phases were found after annealing of Zr-4 oxide nanotubes. The tubular structure morphology of Zr-4 oxide nanotubes did not remain intact after annealing which is attributed to the elimination of F species from the annealed nanotubes.     

聚四氟乙烯未烧结带的分类及应用

介绍了聚四氟乙烯分散树脂及未烧结带的特点,综述了聚四氟乙烯未烧结带的分类和应用,指出了其存在的问题,并对未来的发展进行了展望。     

Pharmacokinetic Comparison of Berberine in Rat Plasma after Oral Administration of Berberine Hydrochloride in Normal and Post Inflammation Irritable Bowel Syndrome Rats

In the present study, post inflammation irritable bowel syndrome (PI-IBS) rats were firstly established by intracolonic instillation of acetic acid with restraint stress. Then the pharmacokinetics of berberine in the rat plasma were compared after oral administration of berberine hydrochloride (25 mg/kg) to normal rats and PI-IBS rats. Quantification of berberine in the rat plasma was achieved by using a sensitive and rapid UPLC-MS/MS method. Plasma samples were collected at 15 different points in time and the pharmacokinetic parameters were analyzed by WinNonlin software. Compared with the normal group, area under the plasma concentration vs. time curve from zero to last sampling time (AUC_0–t) and total body clearance (CL/F) in the model group significantly increased or decreased, (2039.49 ± 492.24 vs. 2763.43 ± 203.14; 4999.34 ± 1198.79 vs. 3270.57 ± 58.32) respectively. The results indicated that the pharmacokinetic process of berberine could be altered in PI-IBS pathological conditions.     

浅析传统聚落中的场所精神

本文介绍了建筑场所现象学的相关理论思想,梳理了场所精神的营建方式,进而将此研究方法与传统聚落的研究结合起来,从更为本质和贴近人们生活的层面进行聚落场所精神的营建,追溯场所的认同感与归属感。     

优化建筑装修施工技术管理的重要性分析

随着社会经济的不断发展,我国的建筑装修行业施工技术水平也有了较大的进步。这一跨越式的发展成就主要得益于国家经济政策的大力支持和建筑施工技术管理水平的不断优化,但是其还有一定的进步空间。     

新型溴化聚醚PBrMEO的合成及表征

以1,4-丁二醇为起始剂,三氟化硼乙醚络合物为催化剂,3-溴甲基-3-乙基氧杂环丁烷为单体,二氯甲烷为溶剂,按阳离子开环聚合机理,首次合成出新型溴化聚醚(PBrMEO),用IR、1HNMR、GPC、TGA、DSC等测试方法对合成产物进行了表征.结果表明,制备出的PBrMEO均聚物Mn为3000,相对分子质量分布为1.243～1.301,Tg为32.36℃,熔程为118.96～132.84℃,热分解温度为337℃.