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Quantitative characterization of kaolinite dispersibility in styrene–butadiene rubber composites by fractal dimension 用分形维数定量表征高岭石在丁苯橡胶复合材料中的分散性
Pub Date : 2015-08-01 DOI: 10.1002/PC.23055
Yude Zhang, Qinfu Liu, R. Frost
A fractal method was introduced to quantitatively characterize the dispersibility of modified kaolinite (MK) and precipitated silica (PS) in styrene–butadiene rubber (SBR) matrix based on the lower magnification transmission electron microscopic images. The fractal dimension (FD) is greater, and the dispersion is worse. The fractal results showed that the dispersibility of MK in the latex blending sample is better than that in the mill blending samples. With the increase of kaolinite content, the FD increases from 1.713 to 1.800, and the dispersibility of kaolinite gradually decreases. There is a negative correlation between the dispersibility and loading content. With the decrease of MK and increase of PS, the FD significantly decreases from 1.735 to 1.496 and the dipersibility of kaolinite remarkably increases. The hybridization can improve the dispersibility of fillers in polymer matrix. The FD can be used to quantitatively characterize the aggregation and dispersion of kaolinite sheets in rubber matrix.
采用分形方法对改性高岭石(MK)和沉淀二氧化硅(PS)在丁苯橡胶(SBR)基体中的分散性能进行了定量表征。分形维数(FD)越大,分散性越差。分形结果表明,MK在胶乳共混样品中的分散性优于磨浆共混样品。随着高岭石含量的增加,FD从1.713增加到1.800,高岭石的分散性逐渐降低。分散性与载料含量呈负相关。随着MK的降低和PS的增加,FD从1.735显著降低到1.496,高岭石的分散性显著增加。杂化可以提高填料在聚合物基体中的分散性。FD可以定量表征高岭石片在橡胶基体中的聚集和分散。
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引用次数: 5
Patterned fen formation and development from the Great Sandy Region, south-east Queensland, Australia 澳大利亚昆士兰州东南部大沙区模式沼泽的形成和发展
Pub Date : 2015-07-31 DOI: 10.1071/MF14359
P. Moss, J. Tibby, F. Shapland, R. Fairfax, P. Stewart, C. Barr, L. Petherick, A. Gontz, C. Sloss
The Great Sandy Region (incorporating Fraser Island and the Cooloola sand-mass), south-east Queensland, contains a significant area of Ramsar-listed coastal wetlands, including the globally important patterned fen complexes. These mires form an elaborate network of pools surrounded by vegetated peat ridges and are the only known subtropical, Southern Hemisphere examples, with wetlands of this type typically located in high northern latitudes. Sedimentological, palynological and charcoal analysis from the Wathumba and Moon Point complexes on Fraser Island indicate two periods of swamp formation (that may contain patterned fens), one commencing at 12 000 years ago (Moon Point) and the other ~4300 years ago (Wathumba). Wetland formation and development is thought to be related to a combination of biological and hydrological processes with the dominant peat-forming rush, Empodisma minus, being an important component of both patterned and non-patterned mires within the region. In contrast to Northern Hemisphere paludifying systems, the patterning appears to initiate at the start of wetland development or as part of an infilling process. The wetlands dominated by E. minus are highly resilient to disturbance, particularly burning and sea level alterations, and appear to form important refuge areas for amphibians, fish and birds (both non-migratory and migratory) over thousands of years.
昆士兰东南部的大沙区(包括弗雷泽岛和库罗拉沙区)包含了拉姆萨尔名单上的大片沿海湿地,包括全球重要的图案沼泽复合体。这些沼泽形成了一个由植被覆盖的泥炭山脊环绕的复杂的水池网络,是唯一已知的亚热带,南半球的例子,这种类型的湿地通常位于北纬高纬度地区。从弗雷泽岛的Wathumba和Moon Point复合体进行的沉积学、孢粉学和木炭分析表明,沼泽形成有两个时期(可能含有图案沼泽),一个时期开始于12000年前(Moon Point),另一个时期开始于4300年前(Wathumba)。湿地的形成和发展被认为与生物和水文过程的结合有关,其中主要的泥炭形成潮Empodisma minus是该地区有图案和无图案沼泽的重要组成部分。与北半球的模糊化系统相反,这种模式似乎是在湿地发展的开始或作为填充过程的一部分开始的。以e - minus为主的湿地对干扰,特别是燃烧和海平面变化具有高度的弹性,数千年来似乎形成了两栖动物、鱼类和鸟类(包括非迁徙和迁徙)的重要避难所。
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引用次数: 13
Watermarking Capacity Control for Dynamic Payload Embedding 动态载荷嵌入的水印容量控制
Pub Date : 2015-07-02 DOI: 10.1007/978-3-319-19024-2_15
H. Nyeem, W. Boles, C. Boyd, C. Boyd
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引用次数: 9
A review of hydrothermal liquefaction bio-crude properties and prospects for upgrading to transportation fuels 水热液化生物原油的性质及其升级为运输燃料的前景
Pub Date : 2015-07-01 DOI: 10.3390/EN8076765
J. Ramirez, Richard J. Brown, T. Rainey
Hydrothermal liquefaction (HTL) presents a viable route for converting a vast range of materials into liquid fuel, without the need for pre-drying. Currently, HTL studies produce bio-crude with properties that fall short of diesel or biodiesel standards. Upgrading bio-crude improves the physical and chemical properties to produce a fuel corresponding to diesel or biodiesel. Properties such as viscosity, density, heating value, oxygen, nitrogen and sulphur content, and chemical composition can be modified towards meeting fuel standards using strategies such as solvent extraction, distillation, hydrodeoxygenation and catalytic cracking. This article presents a review of the upgrading technologies available, and how they might be used to make HTL bio-crude into a transportation fuel that meets current fuel property standards.
水热液化(HTL)提供了一种可行的途径,可以将大量材料转化为液体燃料,而无需预干燥。目前,HTL研究生产的生物原油的性能低于柴油或生物柴油的标准。对生物原油进行升级,可以改善其物理和化学性质,从而生产出与柴油或生物柴油相对应的燃料。粘度、密度、热值、氧、氮和硫含量以及化学成分等特性可以通过溶剂萃取、蒸馏、加氢脱氧和催化裂化等策略进行修改,以达到燃料标准。本文介绍了现有的升级技术,以及如何利用这些技术将HTL生物原油转化为符合当前燃料性能标准的运输燃料。
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引用次数: 192
Human Development and Democracy: Re-examining the Relationship 人类发展与民主:重新审视两者的关系
Pub Date : 2015-07-01 DOI: 10.18999/FORIDS.46.5
S. Gamlath
We explore the role of democracy in human development. Rather than viewing democracy as a prerequisite for or consequence of human development, we suggest that, like health, education, and income, democracy is also an integral part of human development. We draw on the experiences of a number of countries to reinforce this perspective, and propose a two dimensional typology of human development based on the degree of democracy prevailing in a country and “tangible” human development, as measured by the HDI and other supplementary indices. We use this typology to distinguish between four types of human development: sustainable human development, pseudo human development, emergent human development, and failed human development. We propose that such a classification can be used as a tool for the planning and evaluation of development policies.
我们探讨民主在人类发展中的作用。我们不认为民主是人类发展的先决条件或结果,而是认为民主同健康、教育和收入一样,也是人类发展的一个组成部分。我们借鉴了一些国家的经验来加强这一观点,并提出了一种基于一个国家普遍存在的民主程度和“有形”人类发展的二维人类发展类型,以人类发展指数和其他补充指数来衡量。我们用这个类型学来区分四种类型的人类发展:可持续的人类发展、伪人类发展、新兴的人类发展和失败的人类发展。我们建议,这种分类可以用作规划和评价发展政策的工具。
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引用次数: 1
Tornado damage and impacts on nuclear facilities in the United States 龙卷风对美国核设施的破坏和影响
Pub Date : 2015-07-01 DOI: 10.5359/JWE.40.91
D. Prevatt, Duzgun Agdas, A. Thompson, Y. Tamura, M. Matsui, R. Okada
This report provides an overview of the tornado impact on the safe operation and shutdown of nuclear power plants in the United States. The motivation for this review stems from the damage and failure of the Fukushima nuclear power plant on March 11, 2011. That disaster warrants comparison of the safety measures in place within the global nuclear power industry.
本报告概述了龙卷风对美国核电站安全运行和关闭的影响。这次审查的动机源于2011年3月11日福岛核电站的破坏和故障。这场灾难值得与全球核电行业采取的安全措施进行比较。
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引用次数: 4
Mathematical Modelling of Blood Perfusion and Oxygen Transport in the Cerebral Microvasculature of Ischemic Stroke 缺血性卒中脑微血管血流灌注和氧转运的数学模型
Pub Date : 2015-07-01 DOI: 10.1007/978-3-319-19452-3_8
Zhipeng Zhou, Zhen Liu, Y. Cai, Zhiyong Li
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引用次数: 0
Developer charges and housing affordabilty in Brisbane, Australia 澳大利亚布里斯班的开发商收费和住房负担能力
Pub Date : 2015-07-01 DOI: 10.15396/eres2015_294
L. Bryant
Purpose - This paper empirically examines the effect of developer charges on housing affordability in Brisbane, Australia. Developer paid fees or charges are a commonly used mechanism for local governments to pay for new urban infrastructure. Despite numerous government reports and many years of industry advocacy, there remains no empirical evidence in Australia to confirm or quantify passing on of these charges to home buyers. Design/methodology/approach - This research applies a hedonic house price model to 4,699 new and 25,053 existing house sales in Brisbane from 2005 to 2011. Findings – The findings of is research are consistent with international studies that support the proposition that developer charges are over passed. This study has provided evidence that suggest developer charges are over passed to both new and existing homes in the order of around 400%. Research limitations/implications - These findings suggest that developer charges are thus a significant contributor to increasing house prices and reduced housing affordability. Practical/Social Implications: By testing this effect on both new and existing homes, this research provides evidence in support of the proposition that not only are developer charges over passed to new home buyers but also to buyers of existing homes. Thus the price inflationary effect of these developer charges are being felt by all home buyers across the community, resulting in increased mortgage repayments of close to $1000 per month. Originality/value - This is the first study to empirically examine the impact of developer charges on house prices in Australia. These results are important as they will inform governments on the outcomes of growth management strategies on housing affordability, providing the first evidence of its kind in Australia.
目的-本文实证研究了开发商收费对澳大利亚布里斯班住房负担能力的影响。开发商付费或收费是地方政府为新的城市基础设施支付费用的一种常用机制。尽管有大量的政府报告和多年的行业倡导,澳大利亚仍然没有经验证据证实或量化将这些费用转嫁给购房者。设计/方法/方法-本研究将享乐房价模型应用于2005年至2011年布里斯班4,699套新房和25,053套现房销售。研究结果-我们的研究结果与国际研究一致,这些研究支持开发商收费被忽略的主张。这项研究提供的证据表明,开发商对新房和现房的收费都超过了400%左右。研究局限性/影响-这些发现表明,开发商收费因此是房价上涨和住房负担能力降低的重要因素。实际/社会影响:通过对新房和现房的影响进行测试,本研究提供了证据,支持开发商的收费不仅转嫁给了新房买家,也转嫁给了现房买家。因此,整个社区的所有购房者都感受到了这些开发商收费的价格通胀效应,导致每月增加近1000美元的按揭还款。原创性/价值——这是第一个实证研究开发商收费对澳大利亚房价影响的研究。这些结果很重要,因为它们将为政府提供有关住房负担能力增长管理策略的结果,为澳大利亚的此类研究提供第一个证据。
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引用次数: 0
Leaf micromorphology and anatomy of Myrceugenia rufa (Myrtaceae): An endemic coastal shrub of north-central Chile 紫金桃科紫金桃科紫金桃的叶微形态和解剖:智利中北部特有的沿海灌木
Pub Date : 2015-06-30 DOI: 10.4067/S0717-66432015000100010
Hernan A. Retamales, A. Cabello, M. Serra, T. Scharaschkin
Species of fleshy-fruited Myrtaceae are generally associated with humid environments and their vegetative anatomy is mainly mesophytic. Myrceugenia rufa is an endemic and rare species from arid zones of the coast of central Chile and there are no anatomical studies regarding its leaf anatomy and environmental adaptations. Here we describe the leaf micromorphology and anatomy of the species using standard protocols for light and scanning electron microscopy. The leaf anatomy of M. rufa matches that of other Myrtaceae, such as presence of druses, schizogenous secretory ducts and internal phloem. Leaves of M. rufa exhibit a double epidermis, thick cuticle, abundant unicellular hairs, large substomatal chambers covered by trichomes and a dense palisade parenchyma. Leaf characters of M. rufa confirm an anatomical adaptation to xerophytic environments.
肉果桃科的种类通常与潮湿环境有关,它们的营养解剖学主要是中生的。鲁法丝瓜是智利中部沿海干旱地区特有的珍稀物种,对其叶片解剖结构和环境适应性尚无解剖学研究。在这里,我们描述的叶片微观形态和解剖学的物种使用标准协议的光和扫描电子显微镜。M. rufa的叶片解剖结构与其他桃金娘科相同,如存在药物、分裂性分泌管和内部韧皮部。双表皮、厚角质层、丰富的单细胞毛、被毛状体覆盖的大的气孔下室和致密的栅栏薄壁组织。芦花的叶片特征证实了其在解剖学上对旱生环境的适应。
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引用次数: 5
Making apartments affordable: moving from speculative to deliberative development 让人们买得起公寓:从投机开发转向审慎开发
Pub Date : 2015-06-22 DOI: 10.4225/50/55875B64E8B0E
Andrea Sharam, L. Bryant, Tom Alves
Urban consolidation policies in Australia presuppose apartments as the new dominant housing type, but much of what the market has delivered is criticised as over-development, and as being generic, poorly-designed, environmentally unsustainable and unaffordable. In contrast to the usual focus on planning regulation and construction costs as the primary issues needing to be addressed in order to increase the supply of quality, affordable apartment housing this paper uses Ball’s (1983) ‘structure of provision’ approach to outline the key processes informing apartment development to reveal a substantial gap in critical understanding of how apartments are developed in Australia, and identifies economic problems not previously considered by policymakers. Using mainstream economic analysis to review the market itself, the authors found high search costs, demand risk, problems with exchange, and lack of competition present key barriers to achieving greater affordability and limit the extent to which ‘speculative’ developers can respond to the preferences of would be owner-occupiers of apartments. The existing development model, which is reliant on capturing uplift in site value, suits investors seeking rental yields in the first instance and capital gains in the second instance, and actively encourages housing price inflation. This is exacerbated by lack of density restrictions, such as have existed in inner Melbourne for many years, which permits greater yields on redevelopment sites. The price of land in the vicinity of such redevelopment sites is pushed up as landholders' expectation of future yield is raised. All too frequently existing redevelopment sites go back onto the market as vendors seek to capture the uplift in site value and exit the project in a risk free manner. The paper proposes three major reforms. Firstly, that the market for apartment development be re-designed following insights from the economic field of ‘Market Design’ (a branch of Game Theory). A two-sided matching market for new apartments is proposed, where demand-side risks can be mitigated via consumer aggregation. Secondly, consumers should be empowered through support for  ‘deliberative’, or ‘do-it-yourself’ (DYI) development models, in order to increase competition, expand access, and promote responsiveness to consumer needs and preferences. Finally, planning schemes need to impose density restrictions (in the form of height limits, floor space ratios or bedroom quotas) in localities where housing demand is high, in order to dampen speculation and de-risk development by creating certainty. However restrictions on over-development on larger infill sites needs to be offset by permitting intensification of ‘greyfield’ suburbs. Aggregating existing housing lots to enable precinct regeneration and moderate height and density increases would permit better use of airspace thus allowing design outcomes that can optimise land use while retaining amenity.
澳大利亚的城市整合政策将公寓作为新的主要住房类型,但市场提供的大部分住房都被批评为过度开发,并且是通用的,设计不良的,环境不可持续的和负担不起的。与通常关注规划法规和建筑成本作为需要解决的主要问题,以增加优质,负担得起的公寓住房的供应相反,本文使用Ball(1983)的“供应结构”方法概述了告知公寓开发的关键过程,以揭示对澳大利亚公寓开发方式的批判性理解的实质性差距,并确定了政策制定者以前未考虑的经济问题。使用主流经济分析来回顾市场本身,作者发现高搜索成本、需求风险、交换问题和缺乏竞争是实现更高负担能力的主要障碍,并限制了“投机”开发商对潜在公寓业主偏好的反应程度。现有的开发模式依赖于获取土地价值的提升,适合投资者首先寻求租金收益,其次寻求资本收益,并积极鼓励房价上涨。这种情况由于缺乏密度限制而加剧,例如墨尔本内部多年来一直存在的密度限制,这使得重建场地的收益更高。由于土地持有人对未来收益的预期提高,这些重建地点附近的土地价格被推高。现有的再开发地块往往会重新回到市场上,因为供应商寻求获得地块价值的提升,并以无风险的方式退出项目。该文件提出了三大改革。首先,根据“市场设计”(博弈论的一个分支)的经济领域的见解,重新设计公寓开发市场。提出了新建公寓的双边匹配市场,通过消费者聚集来降低需求侧风险。其次,应通过支持“审慎”或“自己动手”(DYI)开发模式赋予消费者权力,以增加竞争,扩大获取渠道,并促进对消费者需求和偏好的响应。最后,规划方案需要在住房需求高的地区实施密度限制(以高度限制、容积率或卧室配额的形式),以通过创造确定性来抑制投机和降低开发风险。然而,对大型填充点过度开发的限制需要通过允许“灰色地带”郊区的强化来抵消。整合现有住宅地块,使区域再生和适度的高度和密度增加,将允许更好地利用空域,从而使设计结果可以优化土地使用,同时保留舒适性。
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引用次数: 10
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