含硫天然气井口橇装LNG装置胺液发泡分析

通过对潼深4井胺液的发泡现象进行分析,分别对新胺液(未使用的胺液)、旧胺液(贫液泵进口的贫液)、压裂液残留物进行发泡试验。得出贫液中的固体颗粒、贫液中的油污、压裂液残留物是造成胺液发泡的原因。提出胺液发泡应对措施和建议。     

液阻、液客对开关阀流量特性影响的仿真研究

开关阀的应用越来越广泛,而液阻、液容的存在严重影响了开关阀的流量特性.对液阻、液容进行了分析,并建立了液阻和液容理论模型,给出了其理论计算公式及仿真模块图.对液阻、液容和开关阀组成的液压系统进行模型分析,建立了考虑液阻、液容的开关阀动态模型,并利用Matlab/Simulink建立了液压系统仿真模块图,通过设置不同参数对开关阀液压系统进行仿真,定性地分析了液阻、液容对开关阀流量特性的影响.仿真结果可以为开关阀的应用提供相关参考.     

液阻、液容对开关阀流量特性影响的仿真研究

开关阀的应用越来越广泛,而液阻、液容的存在严重影响了开关阀的流量特性。对液阻、液容进行了分析,并建立了液阻和液容理论模型,给出了其理论计算公式及仿真模块图。对液阻、液容和开关阀组成的液压系统进行模型分析,建立了考虑液阻、液容的开关阀动态模型,并利用Matlab/Simulink建立了液压系统仿真模块图,通过设置不同参数对开关阀液压系统进行仿真,定性地分析了液阻、液容对开关阀流量特性的影响。仿真结果可以为开关阀的应用提供相关参考。     

正渗透去除单宁酸的影响因素分析

以单宁酸溶液作为原料液、NaCl溶液作为汲取液,在不同的膜朝向、汲取液和原料液浓度、膜面流速、原料液温度、pH值条件下,研究正渗透膜对单宁酸的去除效果。结果表明,汲取液浓度越高、原料液浓度越低、原料液温度越高、错流流速越大、膜活性层朝向汲取液运行模式均有助于提高膜通量,盐通量与膜通量呈正相关;不同影响因素条件下,正渗透膜对单宁酸的截留率均在97%以上,而在膜活性层朝向原料液模式下运行,对单宁酸的截留率更高。     

不同类型混凝土贮液结构液-固耦合弹塑性地震响应

为了获得不同型式混凝土贮液结构的液-固耦合地震响应,利用有限元软件ADINA分别建立壁板厚度、液体高度完全相同的矩形和圆形混凝土贮液结构,考虑混凝土弹塑性特性及液体重力波影响,应用液-固耦合求解器模拟了不同类型混凝土贮液结构的地震响应。结果表明:在不同烈度的双向地震作用下,矩形与圆形贮液结构的壁板位移、液体晃动波高、等效应力峰值均随地震烈度的增大而不断增大;矩形贮液结构的壁板位移峰值均大于圆形贮液结构的壁板位移峰值,即圆形贮液结构的抗震性能较强于矩形贮液结构;矩形贮液结构内的液体晃动幅度均大于圆形贮液结构,但矩形贮液结构的等效应力峰值均小于圆形贮液结构的等效应力峰值。     

微生物对生化需氧量测定结果的影响

水中有机物性质及微生物活性是影响生化反应的关键因素。在水质条件一定的情况下,探讨不同接种液带来的微生物差异对生化需氧量（BOD）的影响。测定了空白样、废水驯化接种液、河流污水接种液、土壤浸出液接种液4组样品,实验结果显示3种不同接种液接种同种稀释水,测得BOD5的差距较大,而同一种接种液所测得的BOD5差距非常小;测定了空白样、河流污水接种液、土壤浸出液接种液BOD5,结果表明河流污水的微生物比土壤浸出液的微生物更具有可生化性。     

采用数学解法求土的液限塑限

介绍用液限塑限联合测定法来测定土的液限、塑限,并在图解法基础上用数学解法求土的液限、塑限,同时编制成电脑软件,使液限、塑限计算变得既准确又快捷。     

微波加热金属液体的实验研究

研究微波加热液态金属的升温特征,在MobileLab-W-R型微波工作站中进行了微波直接加热铜液和铁液的实验研究,实现了微波直接加热铜液和铁液实验,对比研究了微波直接加热和间接加热铜液与铁液的加热效果,并研究了微波功率、金属液质量、温度等对微波直接加热效果的影响,探讨了微波直接加热金属液体的机理.结果表明,微波可以以较快的升温速度直接加热铜液和铁液,且升温速率与微波加热功率呈近似线性递增关系;在相同微波直接加热条件下,同等质量的铜液和铁液的升温速度相近,但不同质量铁液加热时,由于其表面积、微波场强分布等因素的影响,铁液质量对微波加热效果的影响没有明显的线性关系.理论分析认为,铜和铁在熔化后电阻率增大,磁导率明显下降,导致微波在铜液和铁液内部的趋肤深度显著大于固态铜和铁;电导损耗是实现微波直接加热液态金属的主要机制,液态金属可通过电子与原子核碰撞、表面快速更新、内部缺陷阻碍电子运动、原子运动及碰撞等形式吸收微波,将微波能量转化为自身热量.     

水基液污染度分析及滤油器的选择

本文介绍了水基液在动力换档变速箱上的应用、水基液杂质的产生、污染度及水基液滤油器的选择。     

抗溶泡沫液黏度对比例混合装置混合比影响的研究

针对一些工程使用抗溶泡沫液时泡沫灭火系统无法足量抽吸泡沫液的问题,采用6%型和3%型抗溶水成膜泡沫液、3%型低黏度抗溶氟蛋白泡沫液,对泡沫液泵和囊式压力比例混合装置进行试验,研究泡沫液泵在输送抗溶泡沫液时的压力-流量特性及黏度对囊式压力比例混合装置混合比的影响。结果表明,泡沫液泵对不同黏度的泡沫液可完成输送,但输送高黏度泡沫液时,泵的流量会低于额定值,建议考虑一定的裕量;囊式压力比例混合装置使用高黏度泡沫液时,在低流量的情况下,混合比会出现低于额定值的情况。选用添加黄原胶的蛋白类抗溶泡沫液时,建议泡沫液的储存温度不低于15℃,泡沫液泵的抽真空能力不小于0.06 MPa。     

广州人民公园使用状况评价报告

从使用者的角度出发,采用相关文献收集、现场观察、绘制草图、分析功能分区、收集管理部门的信息、记录使用者的活动和痕迹、对典型使用者进行访谈、数据整理等方法,对人民公园的使用做出系统评价,包括位置、尺度、视觉、使用和活动、微气候、入口和边界、交通、种植材料、场地家具等,从中归纳总结出广州人民公园改建使用后的状况.并在分析使用状况的基础上找出公园存在的问题和矛盾,就每个问题提出适当的设计或管理的改进意见并提交意向设计方案.     

谈贯标中企业如何做好检验和试验工作

根据在贯彻GB／T 19001－ISO9000族标准过程中的实际工作经验,从贯彻中为什么要抓好检验和试验工作入手,对检验和试验依据的管理,检验和试验设计的控制,检验和试验人员的培训,检验和试验记录的填写,保存和分析四个方面进行了论述,阐述了检验和试验工作在贯标中的重要性。     

专访沃纳·奥克斯林 ——论历史学家之天职

本文完整呈现对沃纳·奥克斯林(Werner Oechslin)教授的专访,内容涉及图书馆运营、善待知识之方式、知识的后起生命、历史与历史性、历史理论批评之本质、术语翻译与学术立场、历史与设计之关系、何谓之美、现代建筑的理想模型、史学家生命之意义等十个方面,通过绵密而细致的对谈呈现奥克斯林教授对历史学家之天职的理解。     

Global Challenges,Local Solutions: The City as an Ecosystem of Events

In a time of global challenges, cities are critical not only as vehicles for progress, but also as centers of diversity and resilience. Confronted with intensifying climates, and social, ecological, and economic issues, McGregor Coxall focuses on the stories people tell in making their cities. Our projects accept and challenge these stories which underpin city-making: the engine of economic progress, the marketplace of cultural production, and the myth of our separation from “nature.” The success of contemporary city is built on a paradoxical relationship with two pressures: global development and environmental impacts. To address these crises, McGregor Coxall works at two scales, simultaneously, on all of our projects: in the large-scale realm of regional economic development and ecosystemic operations, and at the scale of the person, the street, and the neighbourhood. The systemic understanding provides the contextual basis by which projects perform, economically and environmentally, while our understanding of communities makes each project a genuine product of its time, place, and culture.     

City in transition: Podgorica,Europe's youngest capital city

Podgorica, known as the “city under the mountain,” rests at the intersection of five riversand is Europe's youngest capital. Over a 2000-year-long history, Podgorica has experienced turbu-lence. The city has suffered conquests, wars, nearly complete destruction in WWII, associated with war-related conflicts in the 1990s, and gained its independence at the beginning of the 21st century. Today, Podgorica is a vibrant, dynamic, and rapidly growing city, with current developments that reflect the consequences of post-socialist economic, institutional, social, and cultural transition. In this case study, the development of the built environment of Podgorica is presented in six stages: Roman, Ottoman, Principality of Montenegro and Kingdom of Yugoslavia, socialist, transitional, and contemporary. The study shows the influence of each period in the development of the city and highlights two major challenges of present-day architecture, that is, growing into a modern-day metropolis and the challenge of juxtaposing contemporary Podgorica with Titograd and old Podgorica.     

成兰铁路某地质灾害点崩塌及边坡特征分析

为了查明成兰铁路沿线茂县曲谷沟小学后山崩塌地质灾害的类型、结构形态、规模、变形特征及成因机制,对该崩塌地质灾害开展了工程地质应急勘查工作,采用地面测绘、探井、原位测试等多种勘查手段,查明该崩塌、教学楼的不稳定斜坡(陡坎)成因、类型、规模、范围、稳定状态及危害性,并分析其变形机制,表明:崩塌危岩体规模级别属中型,危害对象等级为一级,勘查地质条件类型为复杂,该灾害体治理工程等级为Ⅰ级。得到的结果可为进一步的评估防治工程提供参考。     

Stormwater control measure (SCM) maintenance considerations to ensure designed functionality

Great investment is made in the design and installation of stormwater control measures (SCMs). Substantial research investment, too, is made to optimise the performance of SCMs. However, once installed, SCMs often suffer from lack of maintenance or even outright neglect. Key maintenance needs for wet ponds, constructed stormwater wetlands, bioretention, infiltration practices, permeable pavement, swales, and rainwater harvesting systems are reviewed with many tasks, such as the cleaning of pre-treatment areas and the preservation of infiltration surfaces, being common maintenance themes among SCMs. Consequences of lacking maintenance are illustrated (mainly insufficient function or failure). Probable reasons for neglect include insufficient communication, unclear responsibilities, lack of knowledge, financial barriers, and decentralised measures. In future designs and research, maintenance (and lack thereof) should be considered. Assessing the performance of SCMs conservatively and including safety factors may prevent consequences of under-maintenance; and requiring regular inspection may help to enforce sufficient maintenance.     

预应力锚索应力测量误差的试验研究与对策

了解锚索应力状态时,锚力计示值与千斤顶示值之间普遍存在着较严重的不匹配现象,通过室内外试验和工程数据分析的汇总分析,得到这种不匹配现象主要由仪器设备使用错误及数据错误、测量仪器误差、构件误差及安装误差等施工误差、锚索张拉及锁定时应力损失等原因造成。把千斤顶示值和锚力计示值有机结合,通过现场试验建立两者示值之间的对应关系,能够对锚索的真实应力状况有个较为全面的、准确的了解。     

A sustainability assessment framework for bridges – a case study: Victoria and Champlain Bridges,Montreal

This paper deals with the development of a framework for assessment of sustainability of bridges, including related technical, economic, environmental and social issues. Sustainable infrastructure assets require diligent conception and design of facilities (with diligent choice of materials and construction techniques), high quality construction, and operations, involving routine maintenance, with optimised life-cycle performance and costs, and minimum impact on the environment over a stipulated long service life and beyond. Partial details of design, construction, maintenance and rehabilitation/renovation of the four versions of the 3-km long Victoria Bridge (1859, 1898, 1958 and 1988) are summarised, along with the partial details of design, construction, severe deterioration and subsequent rehabilitation of the nearly 6-km long, 6-lane Champlain Bridge. Sustainability of both bridges was assessed by implementing the proposed sustainability framework developed in this research programme, along with the use of the analytical hierarchy process which involved evaluation of pairwise comparison of the various categories to assist with evaluation of the sustainability scores. These scores indicate that all four forms of Victoria Bridge (1859, 1898, 1958 and 1988) are partially sustainable, or sustainable, while the Champlain Bridge is unsustainable. This framework can be appropriately adapted for assessing the sustainability of other infrastructure assets.     

吴忠宾馆整体平移工程设计与实施

由于城市规划的需要,吴忠宾馆需要移位。介绍了高53.7m的宁夏吴忠宾馆的平移设计与实施,包括工程特点与难点、移位方式选择、下滑梁及基础、反力系统设计、托盘梁系设计、墙柱切割、平移工程、工程监测、PLC液压同步控制技术、到位连接、工程实施情况、沉降问题、平移总经济效益及社会效益情况等。吴忠宾馆成功平移为高层建筑保护提供了新的选择,积累了经验。