球墨铸铁管在DN2000输水线中的选用

结合黄河水源太原市城市给水工程和平北路DN2000输水线工程实例,对球墨铸铁管、钢管、灰铸管从安全可靠性、输水能力、施工维护三个方面进行分析、比较,最终确定球墨铸铁管为和平北路DN2000输水线的管材,并将球墨铸铁管的特性及其敷设中的管处理、管道借转角度的控制、支墩的设置做了初浅的分析和总结。同时,对球墨铸铁管的广泛应用提出了几点建议。     

天津某环岛交叉口的改建方案

在天津黄海路与第二大街环岛交叉口改建工程中,根据交通状况和限制条件,提出了几种提高交叉口通行能力的方法。经综合比较,推荐采用不破坏环岛形式并通过信号灯控制的交叉口设计方案,达到了提高交叉口通行能力的目的。     

Developing a modified typical meteorological year weather file for Hong Kong taking into account the urban heat island effect

Building energy computer simulation software is a useful tool for achieving sophisticated design and evaluation of the thermal performance of buildings. For successful thermal and energy simulation of buildings, it requires hourly weather data such as dry bulb air temperature, relative humidity, solar radiation, wind speed, etc. Nowadays, an urban city faces a problem of an urban heat island which causes the urban area to have a higher air temperature than the rural region. Since the currently available weather dataset used in building simulation software mainly comes from weather stations located in remote and rural areas, the impact of the urban heat island on thermal and energy performance of buildings may not be effectively reflected. This paper reports an approach to construct a modified typical meteorological weather file, taking into account the urban heat island effect in the summer season. Field measurements have been carried out in the summer months and the corresponding urban heat island intensities were then determined. With a morphing algorithm, an existing typical meteorological year weather file was modified. An office building and a typical residential flat were modeled with a renowned building energy simulation program EnergyPlus. Computer simulations were conducted using the existing and modified typical meteorological year weather files. It was found that there was around a 10% increase in air-conditioning demand caused by the urban heat island effect in both cases. The implications of this and further work will also be discussed in this paper.     

光伏发电技术在海岛供电中的应用探讨

针对常用光伏容量计算方法的不足,论文提出了一种优化的光伏容量计算方法,探讨了海岛太阳能光伏利用的方式,并结合海岛自身特征就海岛光伏利用可能存在的问题给出了一些对策。     

Facing the Sea,with Spring Blossoms

<正>To live on the island for a year, the first things I need to prepare are a variety of vegetable seeds, such as millet, celery and spinach. Planting flowers, such as magnolias, osmanthuses (桂花),sun flowers, butterfly orchids and pomegranate (石榴) flowers, is also a good idea. To feel the germination (发芽) of seeds and blossom of flowers on the island is the most wonderful thing!     

温州汤家桥路—机场大道交叉口交通组织方案

温州市汤家桥路—机场大道交叉口为5条主干路相交形成的五叉路口,采用环岛组织交通。由于交通量不断增加,交叉口车流冲突不断,存在严重的交通隐患。文章在对交叉口的交通状况分析的基础上,详细介绍了利用环岛加信号灯控制的方法进行交通组织,降低了交叉口混乱程度,大大提高了环行交叉口的通行能力。     

Influences of some factors on the formaldehyde content of particleboard

In this study, effects of specific gravity (SG), shelling ratio, wood species, and pressure on the formaldehyde content, physical (SG and thickness swelling (TS)), and mechanical properties (modulus of rupture (MOR), modulus of elasticity (MOE), and internal bond (IB) strength) of particleboard were examined. The best manufacturing parameters were determined for E₁ grade particleboard manufacturing from urea formaldehyde (UF) adhesive. Based on the findings of this study, increasing of SG, shelling ratio, and pressure increased the formaldehyde content. Particleboard made from particles consisting higher amount of beech particles had lower formaldehyde content than that of panel from particles consisting higher amount of pine particles.     

适用于岛礁地区的珊瑚集料砌块热工性能分析

近年来,我国正大力发展海洋岛礁地区的工程建设,但原材料运输成本高故提出一种就地取材的新型珊瑚集料空心砌块。用热线法和DSC法分别测得珊瑚集料的导热系数与比热容,并计算了砌块的热阻、传热系数及热惰性等热工参数,与普通墙体材料进行对比分析。结果表明,珊瑚集料砌体的传热系数比普通墙体材料小,保温性能好;热惰性比普通墙体材料大,热稳定性好。在相同的墙体构造中,珊瑚集料砌体墙的热工性能衰减度和延迟时间均大于普通材料砌体墙,抵抗温度变化的能力比较强。根据06J908—2《公共建筑节能构造(夏热冬冷和夏热冬暖地区)》图集,推荐了4种珊瑚集料砌块墙体用于海岛建筑,可节省运输成本,减少墙体的盐雾侵蚀,提高建筑耐久性和节能效果。     

生态旅游岛控制性详细规划控制体系探析——以福州市马尾新城琅岐岛控制性详细规划为例

本文从生态旅游岛的特点出发,在对城市控制性详细规划控制要素比较分析的基础上,对生态旅游岛控制性详细规划的控制要素构成做了必要的调整和扩展,提出土地使用控制、环境容量控制、建筑风貌控制、配套设施控制、非建设用地控制、行为控制和其他控制等七大主题的控制体系,并以福州市马尾新城琅岐岛控制性详细规划为例,对生态旅游岛的控规的控制体系进行进一步的规划探索。     

Relationship between earthquake disturbance,tropical rainstorms and debris movement: an overview from Taiwan

The tectonically active island of Taiwan experiences numerous earthquakes and some four major typhoons each year. The paper considers the development of debris movements, especially those associated with Typhoon Toraji which passed over the island in 2001, 2 years after the M_L 7.3 Chi-Chi earthquake. The ratio of new and reactivated landslides before and after the Chi-Chi earthquake is discussed and an explanation put forward for the movement of very large blocks down the river valleys.     

雨量变化对珊瑚岛礁淡水透镜体的影响

为探索雨量变化对珊瑚岛礁淡水透镜体的影响，应用质量守恒、Darcy定律和Ghyben-Herzberg比率，推导了珊瑚岛礁淡水透镜体的数学模型。根据西沙地区1989年-1998年10年的月均降雨量及最高、最低年降雨量，用有限差分法计算了永兴岛淡水透镜体的外型和贮水量的变化。结果表明，永兴岛淡水贮量4月最小，10月最大，相差值为4月贮水量的10．5％，而10年间降雨量最大和最小年淡水透镜体贮量与平水年相比，分别多16．8％乖少7．2％，这一结果可用于制定淡水透镜体的开采战略，实现淡水资源的安全、科学、持续开发利用。     

南京江东路道路改造设计理念的综合应用

结合南京市江东路道路改造实例,通过横断面设计、交叉口渠化、交通岛设置、公交专用道、人行横道、主线绿波交通、绿化景观等设计理念的综合应用,极大地提高了城市道路的服务水平。道路预计通行能力由2103pcu/h提高到3450pcu/h;公交运营速度增加;大大提高了交通安全性;良好的景观效果得到了一致好评。     

Market and regulatory factors influencing smart-grid investment in Europe: Evidence from pilot projects and implications for reform

Electricity distribution system operators (DSOs) are expected to invest heavily in system innovation in the form of smart grids (SG) in order to help achieve energy policy goals. In this context, regulatory reforms to spur DSOs investments are considered a policy priority. Based on a review of the European regulatory status and using a dataset of 459 innovative SG projects, this study focuses on market and regulatory factors and performs a series of statistical tests to investigate how the different factor levels affecting SG investments in Europe. The results show that (1) lower market concentration in the electricity distribution sector (2) the use of incentive-based regulatory schemes; and (3) the adoption of innovation-stimulus mechanisms are key enablers of SG investments.     

崇明岛水系改造对水资源的影响初探

崇明岛是我国第三大岛,也是上海21世纪可持续发展的重要战略空间。崇明岛生态型水系改造将进一步提高水资源综合调控能力,促进水资源优化配置,提高全岛淡水资源保证率,减轻咸潮入侵威胁,改善岛内河网水质,为建设崇明生态岛奠定良好的基础。     

浅谈管桩新旧标准对比

对比分析了10G409《预应力混凝土管桩》与03SG409《预应力混凝土管桩》和GB13476-2009《先张法预应力混凝土管桩》与GB13476-1999《先张法预应力混凝土管桩》新旧标准之间的差异;并以管桩400(95)AB桩型为例,采用新标准详细计算了混凝土管桩的有效预压应力、抗裂弯矩、抗裂剪力、桩身轴心受压承载力、桩身轴心受拉承载力。     

劈山填海造地超高填方地基桩基施工技术

在舟山蚂蚁岛进行劈山填海造地以建造船厂,最大填方石块粒径愈1m,在淤泥土上形成了厚度达22m的高填方层。由于填土层极不稳定且基础施工工期短,基础类型选用高强度预应力管桩。施工时采用引孔植入技术以顺利穿透碎石填方层,进入持力层。为保证引孔植入桩的承载力,采用在现场监测数据指导下的信息化施工方案,针对沉桩挤土对高填方地基的影响,及时作出相应处理。     

Neubau der nördlichen Monbijoubrücke über die Spree in Berlin‐Mitte

Reconstruction of the northern Monbijoubridge across the river Spree in central Berlin. The Bodemuseum, situated on the historical museum island in central Berlin, was reopened in October 2006 after 6 years of reconstruction. The island is connected at the northern end to the adjacent city district “Spandauer Vorstadt” by the Monbijoubridge, which crosses the River Spree. The original two span arch bridge was destroyed in World War II. As a result, a new bridge was built, designed as a single span arch bridge with natural stone cladding. During the final design, the low bearing capacity of the soil at the northern bank and the natural stone cladding required careful design and construction. The new bridge was finished after 14 months of construction on time for the reopening of the Bodemuseum on 12 October 2006.     

Evaluating Algibon adsorbent and adsorption kinetics for launderette water treatment: towards sustainable water management

Grey water from commercial laundry facility was used for treatment to substitute the conventional water sources. Algibon, A800 derived from mesoporous alginic acid and Starbon S300, carbonaceous mesoporous polysaccharide‐derived materials, silica gel (SG) and activated carbon (AC) were used for the treatment of wastewater. The optimum adsorbent dosing and pH value for each adsorption system are defined. The adsorption efficiency are in the order of A800 > SG > AC > S300 and the removal rate reached to 91% when A800 was used. Furthermore, the reaction followed the second‐order kinetic model and the rate constant is high when A800 adsorbent is applied.     

地形因子影响下的涠洲岛传统聚落 景观特征研究

地形地貌条件是决定人类对地表景观开发的关键因 素，以土地开发时序为主要脉络是探究聚落形成机制的关键。 基于涠洲岛地形地貌，通过多次田野调查、文献查阅、历史卫 星地图收集等研究方法，以土地开发为时间轴线，总结归纳 出受涠洲岛地形地貌影响下的聚落景观特征：1)土地开发历 程围绕该岛各个地貌单元展开，聚落选址与各地貌单元关系紧 密；2)南、北聚落分布高程与坡度值的不同，导致人口承载 力存在差异，在移民人口增加的情况下，呈现聚落斑块北大南 小、聚落密度北低南高的景观差异；3)具有抵御风灾的多层 级防灾景观特征；4)海岛资源限制下，利用特有的石材建造 民居景观。通过涠洲岛这一小型热带海岛聚落景观的研究，试 图挖掘小型海岛的开发历史，在中国建设以岛屿为“海洋第二 经济带”的时代背景下，具有重要意义。     

缓解热岛效应的居住区环境绿化探讨

城市热岛效应是伴随城市建设发展出现的一种负面现象,居住区环境绿化可解决在有限的城市空间提高绿地效率、缓解热岛效应的问题。文章从城市热岛效应出发,对缓解热岛效应的居住区环境绿化布局模式、方法及相关技术研究进展等方面进行了探讨。