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Search Results: 1 - 10 of 41959 matches for " 何亚东 "
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评估航空铝合金剥蚀性能新方法的研究
建平,亚东,樊蔚勋
腐蚀科学与防护技术 , 2003,
Abstract: 提出了一种新的评估航空铝合金剥蚀性能的电阻法,并结合LC4CS铝合金剥蚀性能和腐蚀电位的研究,进一步说明这种方法的可行性.
湖泊碳库效应及校正方法
王宗礼, 建华,亚东
中国沙漠 , 2014, DOI: 10.7522/j.issn.1000-694X.2014.00025
Abstract: 湖泊作为过去环境变化的信息载体,可以很好地提供高分辨率的连续记录,因此常被用来进行定年研究。湖泊沉积物放射性碳定年由于缺乏陆源植物残体、碳屑等可靠的定年材料,多选用其他材料(如全样有机质、水生残体及各类壳体),但是这些材料通常受到“碳库效应”(Thereservoireffect)的影响,而使得年代结果失真,导致难以建立高精度的年代框架,成为这一领域研究放射性碳年代应用的瓶颈。因此,如何对湖相沉积物14C年代结果进行有效的碳库效应校正,对高精度年代序列的建立具有重要意义。本文综览了近几十年来针对湖泊碳库效应进行研究所取得的一系列研究成果,详细总结了影响湖泊碳库效应的各种因素,讨论了碳库效应对湖泊沉积物定年结果的影响;分析了目前对湖泊碳库的各类校正方法,包括使用同一测年手段、不同测年材料建立点上碳库大小以及采用不同测年手段对碳库的校正等。本文为湖泊沉积物高精度年代序列的建立提供了一定的参考。
重庆码头大直径深嵌岩短桩水平承载力试验研究
春林,龚成中,亚东
工业建筑 , 2014, DOI: 10.13204/j.gyjz201409021
Abstract: 在码头建设过程中,由于山区场地条件的限制,大直径深嵌岩短桩在工程中得到了使用,但是在水平荷载作用下,相应的原位试验研究还比较缺乏。通过采用对顶法对重庆码头大直径深嵌岩短桩的水平承载特性进行测试,分析包括桩顶的荷载-位移曲线、水平位移分布规律以及桩身弯矩及剪力的分布情况。研究结果表明大直径深嵌岩短桩水平荷载与位移关系基本呈直线分布,增加桩长对改善其水平受力性能较为有利;从桩土的侧向变形来看,变形主要发生在上部填土处,表层处土体的密实度及桩径大小对侧向变形影响较大;从桩身的内力分布来看,桩身弯矩在距离地表6m处最大,最大剪力主要分布在地表附近。
面向产品创新设计的广义专家群体知识获取
赵锋,卫平,秦忠宝,亚东
计算机集成制造系统 , 2009,
Abstract: 为更好地从互联网获取适用的知识,以激发创新灵感,提出了一种面向产品创新设计的广义专家群体知识获取的思路及方法。首先对普通专家提供的知识样本进行分析,并提取样本特征。然后,针对产品创新设计知识的特点,构建了融入感性语义词汇的领域本体。基于领域本体,对专家知识样本特征词汇进行了扩展。在此基础上,通过搜索和过滤,获得了来自互联网的特殊专家的知识文本。进而运用知识元抽取技术,构建了广义专家群体知识库。最后,通过实例说明了特殊专家知识获取及过滤的效果,以及广义专家群体知识库的构建形式及结果。
某尾矿坝渗流场数值模拟及坝体稳定性分析
亚东,巨能攀,朝阳,游昆骏
人民黄河 , 2015,
Abstract: ?尾矿坝坝体加高会改变库体堆填物的渗流特性,影响坝体的安全性。综合运用钻孔勘探成果和室内渗透试验所得渗透系数,建立了尾矿坝渗流分析模型,应用二维有限元数值计算软件geo-seep,对某尾矿坝加高后的渗流场进行了计算分析。分析结果表明,天然工况下,加高后尾矿坝库区浸润线偏高,不利于尾矿坝的安全稳定运行。为此在优化加高方案中提出了加强排渗设施的初步方案,数值模拟结果表明,该方案能较好地降低坝体浸润线,提高坝体稳定性。在尾矿坝排渗设施布置时,通过渗流模拟可以检验排渗方案的合理性。
热塑性聚氨酯熔体粘弹性对发泡的影响研究
臧萌,信春玲,亚东,闫宝瑞
- , 2018, DOI: 10.13543/j.bhxbzr.2018.02.007
Abstract: 采用旋转流变仪和差示扫描量热仪系统测试了3种结构不同热塑性聚氨酯(TPU)的动态流变性能和非等温结晶曲线,并结合间歇发泡实验探讨了TPU熔体粘弹性对发泡倍率和泡孔结构的影响。结果表明:3种TPU均表现出线性分子链特征;具有高的零切黏度及低频区储能模量的TPU表现出更大的熔体强度和更好的熔体弹性,有利于获得发泡倍率高、泡孔均匀的发泡材料。
Abstract:The dynamic rheological properties and non-isothermal crystallization curves of three thermoplastic polyurethane(TPU) samples have been tested using a dynamic rheometer and a differential scanning calorimeter. Batch foaming experiments were carried out in order to investigate the effect of the viscoelasticity of TPU on the expansion ratio and the cell structure. The results showed that the three TPU samples all exhibited linear molecular chain characteristics. The TPU sample with the highest zero shear viscosity and storage modulus in the low frequency range showed the highest melt strength and melt elasticity, making it easier to obtain a material with high foaming ratio and uniform cell structure.
环氧基低聚物改性聚对苯二甲酸乙二醇酯的流变性能和发泡性能
杨兆平,信春玲,亚东
- , 2017, DOI: 10.13543/j.bhxbzr.2017.06.008
Abstract: 为了提高聚对苯二甲酸乙二醇酯(PET)的流变性能和发泡性能,采用环氧基扩链剂(ADR)对PET进行反应挤出改性,并利用动态旋转流变仪和单轴拉伸黏度仪对PET的流变性能进行系统表征,同时通过快速降压法研究了改性PET的发泡性能。流变测试结果表明:与未改性PET相比,ADR改性PET具有更高的复数黏度和低频区储能模量、更低的损耗角正切,呈现出明显的应变硬化现象;当ADR质量分数超过0.5%时,改性PET表现出凝胶结构的流变特性。采用间歇发泡工艺得到了发泡倍率为30倍、泡孔均匀细密的PET发泡材料,说明改性PET具有优异的可发泡性能。
Abstract:An epoxy-based chain extender (ADR) has been used to improve the rheological behavior and foaming properties of polyethylene terephthalate (PET) obtained by a reactive extrusion process. The rheological behavior of PETs was characterized by using a dynamic rheometer and a uniaxial stretching viscometer. In addition, a rapid depressurization method was used to investigate the foaming properties of the modified PETs. Rheological results showed that PETs modified with ADR had higher complex viscosity and storage modulus, and lower loss tangent than the neat PETs. Furthermore, the modified PETs exhibited obvious strain hardening. When the ADR content exceeded 0.5 wt%, a gel structure appeared in the modified PETs. The modified PETs exhibited obvious strain hardening during tensile rheological tests. PET foam, with an expansion ratio of 30 and a fine cell structure, was obtained by using a batch foaming process, indicating the excellent foaming performance of the modified PETs.
基于复杂网络的投送保障网络模型构建
Delivery Support Network Model Building Based on Complex Network

松柏,康凯,亚东,陈琪
- , 2017, DOI: 10.11784/tdxbz201611031
Abstract: 针对投送保障网络研究缺乏系统科学的分析和形象化的网络建模方法等问题, 借鉴复杂网络理论, 首先从节点、边、数学描述3个方面对投送保障网络进行了规范化描述.以此为基础, 结合投送保障网络实际要求, 构建了投送保障网络拓扑结构模型, 并从微观、中观、宏观3个方面度量分析了投送保障网络拓扑结构.结果表明, 该模型可以有效反映所构建的投送保障网络的规模、层次、跨度及连接程度等特征, 为投送保障网络的研究提供了形象直观的描述方法与建模途径.对于了解投送保障网络发展规律, 促进投送保障力量建设, 提高投送保障整体效益具有重要的理论价值和实践意义.
The current research on delivery support network is in lack of scientific analysis and visualizing network modeling method. This paper used the theory of complex networks to solve those problems. Firstly,the delivery support network obtained a normalized description from three aspects including the node,edge and mathematical description. Secondly,a topology structure model of the delivery support network was built combined with the actual requirements of delivery support network. Thirdly,the topology structure characteristics of the delivery support network were analyzed from three aspects including micro,meso and macro. The results show that the model could effectively reflect the characteristics of the established delivery support network such as scale,level,span,connection degree etc. It provides visual description method and modeling approach for research of delivery support network. It has important theoretical value and practical significance in finding out the development rule of delivery support network,promoting construction of delivery support power and improving overall efficiency of delivery support
我国“十一五”期间的节能效果分析—基于完全因素分解模型的实证研究
Analysis of China’s Energy-Saving Effect during the 11th Five-Year-Plan Period—Based on the Empirical Study of Complete Decomposition Model
 [PDF]

亚东, 丁涛
Sustainable Energy (SE) , 2013, DOI: 10.12677/SE.2013.33009
Abstract: “十一五”期间,我国能源消费强度下降了19.06%,基本实现了“降低20%”的总体目标。本文将我国的能源消费划分为产业和居民生活消费两部分,运用完全因素分解法分别对产业部门的经济因素、结构因素和效率因素以及居民生活消费部门的人口因素、收入因素和效用因素的节能效果进行了分析。结果表明,在“十一五”期间,经济因素是拉动产业部门能源消费量增长的主要原因。产业部门节能主要是通过效率因素实现的,结构因素并没有实现节能。收入因素是居民生活消费部门能源消费量增长的主要原因,居民生活消费部门的节能主要是通过效用因素实现的。
During the 11th Five-Year-Plan period, energy consumption intensity reduced by 19.06%, which was very close to a reduction of 20% in the main target. In this paper, China’s energy consumption was divided into industry sector and household sector. Based on a complete decomposition model, the energy consumption change of industry and household sectors were studied. The effect on the energy consumption change of industry sector was decomposed into economy factor, structure factor and efficiency factor. And the effect on the energy consumption change of household sector was decomposed into population factor, economy factor and utility factor. The results showed that ever- increasing energy consumption of industry sector was mainly attributed by the economy factor. The energy savings of industry sector was mainly achieved by efficiency factor, while the structure factor did not realize energy-saving. In household sector, income factor contributed to the energy consumption increase, and the utility factor was the main reason to achieve energy savings.
热喷涂LDPE/n-SiO2复合涂层非等温结晶动力学
亚东,朱忠诚,张晓静,领好,张忠厚
化工学报 , 2011,
Abstract: 采用火焰喷涂法制备了低密度聚乙烯(LDPE)涂层和LDPE/纳米二氧化硅(n-SiO2)复合涂层。利用差示扫描量热法(DSC)对涂层的非等温结晶行为进行研究,并用Jeziorny法和Mo法进行处理。结果表明,Jeziorny法和Mo法处理涂层的非等温结晶过程比较合理;Jeziorny法得到的结晶速率常数和Avrami指数均随冷却速率的增加而增加,且n-SiO2的加入使复合涂层的结晶速率常数和Avrami指数略有升高、半结晶时间降低,结晶速率增大,表明n-SiO2服务把本文推荐给朋友低密度聚乙烯;纳米氧化硅;非等温结晶动力学;复合”几篇好文章,特向您推荐。请点击下面的网址:"name="neirong">加入引用管理器E-mailAlertRSS作者相关文章
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