纯棉体系矿棉吸声板浅析

矿棉吸声板由于具备良好的降噪性能和防火性能,广泛用于各种建筑吊顶、贴壁的室内装修。本文简述了纯棉体系矿棉吸声板的装饰性、吸声性和防火性三方面性能,通过简单的对比,论述了两种体系产品性能的差异。     

掺超细活性硅微粉混凝土的抗冻、抗碳化及抗氯离子渗透性能研究

通过掺入量分别为10%、15%和20%超细活性硅微粉混凝土抗碳化试验、冻融性试验及抗氯离子渗透试验,研究了超细活性硅微粉对混凝土耐久性能的影响。试验研究表明:掺入一定量的超细活性硅微粉可提高混凝土抗碳化性能,但掺入量超过15%后抗碳化性能逐渐减弱;掺入超细活性硅微粉可增强混凝土抗冻性能,提高混凝土抗氯离子渗透性,且随着超细活性硅微粉掺入量的增加,混凝土抗冻性能以及抗氯离子渗透性逐渐增强。     

PVC地板性能评价标准现状研究

介绍了PVC地板性能评价标准的现状,对产品部分重要性能参数如耐磨性、燃烧性能、防滑性、抗菌性、防静电性能及隔声降噪性能的测试方法及评价标准进行了探讨,为PVC地板产品标准修订和制定提出了建议。     

水性氟(碳)树脂的制备及应用研究

介绍水性氟(碳)树脂的制备方法和基本性能,讨论乳化剂、反应温度、搅拌速度对聚合过程和产品性能的影响。检测结果表明,用水性氟(碳)树脂制备的水性氟(碳)涂料具有超耐候性、耐沾污性等优异性能。     

无螺母高强螺栓与端板连接的拉拔性能研究

为研究无螺母高强螺栓与端板连接的拉拔性能,进行了33组连接件的静力拉拔试验,分析了高强螺栓直径、材性、长度以及端板材性、厚度对连接件拉拔性能的影响,提出了反映无螺母高强螺栓与端板连接拉拔性能的三折线理论分析模型。结果表明:螺栓本身的直径、材性、长度等对拉拔性能的影响十分明显;端板厚度、材性等对拉拔性能的影响较小;将通过理论分析模型得出的反映连接件拉拔性能的荷载-位移曲线与试验曲线进行比较,两者吻合良好。     

肋环型劲性支撑穹顶结构静力性能研究

给出劲性支撑穹顶结构静力分析时的基本假设和非线性有限元方程。探讨劲性支撑穹顶结构索垂度的影响,对比分析该结构与索穹顶结构的静力性能,最后讨论初始预应力、跨度、矢高和环向等分数等参数对结构静力性能的影响。算例分析表明,索垂度对劲性支撑穹顶结构静力性能的影响可忽略不计。劲性支撑穹顶结构的整体刚度比索穹顶结构大,脊索的受力性能更能得到充分的发挥。     

TLA/SBR复合改性沥青与混合料性能研究

基于复合改性沥青针入度体系评价指标和接触角粘附性试验,评价TLA/SBR改性沥青的高低温性能、离析及施工和易性,通过室内路用性能和悬臂梁疲劳试验验证TLA/SBR改性沥青混合料的路用性能与抗疲劳性能。结果表明,掺加TLA可显著提升SBR改性沥青的软化点、黏度、表面能,改善复合改性沥青的粘附性,掺加SBR可改善改性沥青的低温延展性;掺加TLA可显著改善SBR改性沥青混合料的高温性能和水稳定性,SBR可弥补TLA改性沥青混合料的低温性缺陷,TLA/SBR复合改性沥青混合料具有优异的路用性能和抗疲劳性能。TLA的适宜掺量为20%～30%,SBR的适宜掺量为3.5%～4.5%。     

SMA沥青混合料均匀性和路用性能研究

选用木质素纤维、矿物棉纤维和短切矿物纤维,通过室内试验,对比分析了掺加以上三种不同纤维的SMA沥青混合料的均匀性及路用性能,对比试验结果表明:掺加矿物棉纤维和木质素纤维后,SMA混合料表现出良好的均匀性;掺加短切矿物纤维的SMA混合料的高温稳定性能较好,水稳性能较差;纤维沥青混合料的均匀性在一定程度上影响其路用性能。     

尾矿砂石混凝土耐久性的试验研究

通过对天然砂石混凝土和尾矿砂石混凝土耐久性能的系统试验研究,对比了两者的抗冻性、抗氯离子渗透性和抗碳化性等性能,研究分析表明,尾矿砂石混凝土的抗冻性与天然砂石混凝土的基本接近;对于所配制的C30混凝土,尾矿砂石混凝土的抗氯离子渗透能力不如天然砂石混凝土的好;尾矿砂石混凝土的抗碳化性能高于天然砂石混凝土的抗碳化性能.     

改性聚酯纤维混凝土的性能研究及其在机场道面中的应用分析

改性聚酯纤维掺入到混凝土中,可有效阻止和减少混凝土早期塑性裂缝的产生,提高混凝土的力学性能,改善混凝土的抗冲击性能及抗渗性能等耐久性能。将改性聚酯纤维应用到机场道面中,能够增强道面混凝土的早期抗裂能力,改善道面混凝土的抗冲击性、抗渗性、抗冻性等耐久性能以及使用性能,延长道面使用寿命,创造巨大的经济效益和社会效益。     

Development and applications of trenchless technology in China

Trenchless technology has developed for almost 10 years in China since the first symposium on trenchless technology was held in Beijing (Peking) in 1996 and the China Society for Trenchless Technology-CSTT was established in 1998. Driven by the dramatically increased demand for underground pipeline installation throughout the nation, China has made significant progress in research and development in trenchless technology in the past 10 years. For example, there are more than 200 contractors engaged in trenchless construction, using more than 2000 horizontal directional drilling machines, among which approximately 700 have been introduced in the last year, and the biggest HDD rig in the world is now in China. In addition, China has made many achievements in education, research, and new products development and has accomplished many challenging projects in terms of complexity, diameter and distance in this field. There is a huge market potential for trenchless technology in mainland China.This paper presents the latest research, education, training, marketing and technical status of trenchless technology in China, and discusses the potential market, trends and factors that will influence trenchless technology in the next decade in China.     

建筑监管:理论透视·模式选择·操作优化

为使监管更有效、合理、优化,梳理引入市场监管的一般认知和市场行为、履约能力、治理结构、动态综合四种监管模式;指出建筑监管对经济制导、信息披露、经营风险防控、危机处理和市场退出等重大问题,认识不足与手段欠缺、力度不够与方式不多、注重日常管控与忽视系统制衡、注重行为规制与轻慢市场自治并存;简论引入多方互动形式、推行新型监管范式、培育利益制衡主体、采取竞争促进举措、发展履约效能评估和建立危机应对管道等优化监管操作的具体策略;分期设计走向动态综合监管模式的内容;得出理论认知与实践解释结合较好的结论。     

Survey of contamination of estrogenic chemicals in Japanese and Korean coastal waters using the wild grey mullet (Mugil cephalus)

We monitored the contamination by environmental estrogens (EEs) of coastal areas in Korea and Japan using the wild grey mullet. The grey mullet were collected from Ansan, Jeju, Yeosu, Tongyeong, and Busan in Korea and Nagasaki, Omuta, and Fukuoka in Japan. Contamination by EEs was determined by measuring vitellogenin (VTG) levels in serum and identifying gonadal abnormalities histologically (i.e., testis-ova). In four sites in Korea (Ansan, Yeosu, Tongyeong, and Busan) and two sites in Japan (Nagasaki and Fukuoka), serum VTG in immature and male grey mullet was detected at levels greater than 1.0 μg/ml, which is considered to be an abnormal level. Although, testis-ova were observed in some individuals collected in Ansan, Tongyeong, and Busan in Korea and Omuta in Japan, there was no correlation between individuals with testis-ova and individuals with abnormal levels of VTG. Furthermore, in Japan, serum VTG levels of fish collected from Nagasaki and Fukuoka were also greater than 1.0 μg/ml. Although individuals with testis-ova were found in Omuta, these fish expressed normal levels of serum VTG. Our results suggest that the grey mullets living in these coastal areas are influenced by EEs in the environment. Furthermore, it appears that the production of VTG and the occurrence of testis-ova are caused by different mechanisms.     

Health assessment of artisanal gold miners in Indonesia

Small scale miners use mercury to extract gold from ore in many countries. An environmental and health assessment was performed in Indonesia in two regions, Galangan in Central Kalimantan and Talawaan in Northern Sulawesi. The environmental assessment showed severe mercury contamination of the sediments, and increased mercury levels in local fish. For the health investigation 281 volunteers were recruited and examined by a standardized questionnaire, a neurological examination and neuro-psychological tests. A medical score was used consisting of significant factors of mercury intoxication. Mercury exposed workers showed typical symptoms of mercury intoxication, such as movement disorders (ataxia, tremor, dysdiadochokinesia, etc.). Blood, urine and hair samples were taken from any participant and analyzed for mercury. The mercury concentration in the biomonitors was high, partly extreme high in the working population, increased in the population living in the same habitat and low in the control group. By a standard protocol which includes a combination of threshold values of mercury in the biomonitors and a medical sum score the diagnosis of chronic mercury intoxication was made for highly burdened workers (amalgam smelters) in 55% in Sulawesi and in 62% in Kalimantan. Less exposed mineral processors and the general population in the mining areas were also intoxicated to a high percentage.     

天津中国大戏院建筑研究

20世纪20年代-30年代,是中国近代剧院建筑繁荣发展的阶段,上海、天津、北京等许多大城市在这一时期新建了一批高水平的剧院.这些剧院的建筑设计、技术设备和施工质量都已接近当时国际上的先进水平.天津的中国大戏院就是这些剧院中的典型代表,在当时具有较大影响,反映了20世纪初天津现代建筑的设计、技术水平和艺术风格.该戏院现保存完好,在1997年被公布为天津市文物保护单位.该文在现场调查和文献收集的基础上,分析了中国大戏院的背景和历史、选址和区位、风格和立面、平面和流线、结构和剖面、装饰和门窗等.     

Metamorphism in culture and housing desing: Turkey as an example

Lawrence maintains about all architectural environments and housing that, they are both in a relationship with culture and they are a total configuration of social, demographical, psychological, human behavioral and environmental structure. Moreover, in analyzing this complex structure, he emphasizes to examine it within two perspectives: design-meaning and use. Consequently, the basic components, which affect housing design, are classified in three main topics: cultural, social, and psychological. In the light of Lawrence's ideas, under the topic of the role of culture and tradition in the development of housing, this paper aims to define the basic Turkish traditional housing principles with slogans and important examples. In this content, cultural, social and psychological components in traditional Turkish houses are held under the heading of the development of traditional Turkish house. The organization rules, the effects of the basic psycho-social components…etc., and the presence of these principles are criticized with Turkish housing examples before and after 1980. The chosen period in this study is not coincidental. The aim of choosing the periods before and after 1980 has a special meaning in Turkey's economic, politic and social life. Choosing these two basic periods, will not only point out the changes—like a metamorphism—in cultural life, but in architectural needs in Turkish houses. Therefore, in the aim of analyzing cultural changes and their effects on housing design, the architectural meanings in the elements of Turkish houses are put forward in details, in order to make some estimation for the future of changing Turkish architectural life.     

MS—2型聚酯路标涂料

以不饱和聚酯树脂和水泥为成膜物质,掺入一定量的填料、助剂和颜料经充分搅拌混和、研磨而制成的聚酯路标涂料,综合了树脂和水泥的优良性能,具有良好的标志性和优异的耐磨、耐候性,且附着力强,配制简单,施工方便,干燥迅速,成本较低。     

岩石爆炸动力学的若干进展

 论述岩石爆炸动力学原理及其工程应用研究近年来的若干进展,主要内容包括爆炸空腔范围以及各类破坏区范围的理论确定方法,地下爆炸近区的“短波”和“弱波”理论,爆炸远区——弹性区的运动和力学参数以及地下爆炸时岩石破碎等理论研究成果。同时还介绍了实验室条件下均匀介质中爆炸效应的规律和地应力、裂隙、浅埋时等不均匀、不连续性影响因素的实验室模拟爆炸试验研究。在相关研究的基础上,给出实际岩体中的爆炸效应试验,包括近区破坏效应、远区地震效应、不可逆变形区以及地下爆炸和浅埋(抛掷和定向)爆炸中相似关系的最新成果。此外,简要介绍岩石爆炸动力学在不同领域中的工程应用,并就今后岩石爆炸动力学研究的展望阐述一点认识。     

Urban environmental mercury in Changchun, a metropolitan city in Northeastern China: source, cycle, and fate

Mercury concentrations in each environmental compartment in Changchun City had obvious spatial and temporal trends. Particulate Hg (HgP) and total gaseous mercury (TGM) concentrations in air, total Hg (HgT) concentrations in precipitation and ratios of HgP to HgT (total Hg in air) in the atmosphere in heating season were higher than those in non-heating season, which resulted from civil heating. In contrast, reactive Hg (HgR) concentrations in precipitation were higher in non-heating season than those in heating season. TGM and SO2 in air had good agreement. HgP concentrations in the atmosphere were correlated with HgT concentrations in precipitation. Based on Hg concentrations in each environmental compartment, Hg exchange fluxes between environmental interfaces were estimated. Only 11.6% of Hg, emitted from coal combustion, deposited into land surface in urban district and the rest part participated in regional or global cycle, so urban district was the source of Hg global and regional cycle. Net fluxes of Hg into land surface and water were 34.26 kg year(-1) and 0.051 kg year(-1), respectively, which were clearly accumulated in the water and soil. Therefore considering urban local Hg cycle, each environmental compartment of urban ecosystem (water, air and soil) was the sink of Hg.     

Cell phones for the spirits: ancestor worship and ritual economies in vietnam and its diasporas

Religion has been thriving in the Socialist Republic of Vietnam since ??i m?i, the onset of market reforms in the late 1980s. Votive paper offerings, part of spiritual and economic well-being, play a crucial role in performing religious practices in the socialist country as well as among diasporic Vietnamese. In urban Hanoi, material objects made from paper are traded in marketplaces and later burned in the streets, in temples and pagodas, in private yards and other places on special occasions in order to be transmitted to the ancestors. In the past few years, the range of votive paper offerings produced, traded, and sent to the deceased has expanded to include new forms and references to new media. Drawing on recent debates in the role of media in religion and in particular on technologies of mediation, I focus on the use of votive paper offerings in the sociocultural context of the Vietnamese spirit world. I explore how new media and media technologies are embedded in multilayered processes of mediation in Vietnam and its diasporas. Taking religious practices of burning votive paper offerings as an ethnographic example, this essay aims to contribute to ongoing debates on popular religion and the sacred life of material goods in late socialist Vietnam, on its transnational ties, and on the entanglements between religion, media and materiality.