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The Correlation between Density and Low-Temperature Creep Property of Asphalt

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China Petroleum Processing & Petrochemical Technology 2012年第2期14卷 31-38页

作者： Zhang Xiaoying Xu chuanjie State Key Laboratory of Heavy Oil China University of PetroleumDongying 257061 Shtar Science&Technology Group China University of PetroleumDongying 257061

The density of asphalt was measured with the pycnometer and densitometer. Creep properties of the asphalt were investigated with the bending beam rheometer at temperatures ranging from 0 ~C to -36 ~C. The asphalt density data used to correlate with the creep properties were calculated from the regression equation of density and temperature. The asphalt sample used to determine the creep property was aged by the standard RTFOT test and the PAV test. The test results showed that the asphalt density had a linear relationship with temperature changes. The logarithm of the creep stiffness and the slope of the logarithm of the stiffness at 60 seconds all demonstrated a linear relationship with the density, and the regression coefficient of these data was around 0.99. The creep stiffness and the slope of the creep stiffness can be calculated from the asphalt density at the same temperature.

关键词： asphalt density creep stiffness low-temperature property

The Mechanism of Asphalt modification by Crumb Rubber

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China Petroleum Processing & Petrochemical Technology 2012年第3期14卷 39-43页

作者： Zhang Xiaoying Xu chuanjie State Key Laboratory of Heavy Oil China University of Petroleum Shtar Science&Technology Group China University of Petroleum

To investigate the mechanism of asphalt modification by crumb rubber,the interactions between FCC slurry and rubber particles were evaluated at different temperatures and *** rules of the change in mass of SARA composition in FCC slurry were obtained before and after its interaction with rubber particles,which showed that crumb rubber not only absorbed saturates and aromatics but also *** promoted the desulfurization or degradation of crumb rubber during the interaction between asphalt and crumb rubber.

关键词： asphalt crumb rubber mechanism modification SARA composition

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长江口新增太仓险工段成因及应对措施初探

长江技术经济 2024年第4期8卷 1-7页

作者：刘传杰张朝阳长江水利委员会水文局长江口水文水资源勘测局上海200136

近年来,长江口河段局部河床出现强烈冲刷,太仓河段南支新太海汽渡至七丫口段升级为新的险工段,预警级别为最高级。通过对长江口太仓险工段水文资料、多频次高精度原型实测地形数据的初步探究,发现新险工段近岸段河床演变呈现出深槽南逼... 详细信息

近年来,长江口河段局部河床出现强烈冲刷,太仓河段南支新太海汽渡至七丫口段升级为新的险工段,预警级别为最高级。通过对长江口太仓险工段水文资料、多频次高精度原型实测地形数据的初步探究,发现新险工段近岸段河床演变呈现出深槽南逼、陡坡加剧、冲刷强度增大、最大冲刷区上移等特点,险工段成因主要包括上游河势调整、上游来沙减少、近岸流速流向变化等。针对险工段成因,提出了应对策略。

关键词：长江口新险工段冲刷成因太仓河段

掺WO_(3)对碲酸盐玻璃热稳定性改善和Er^(3+)/Yb^(3+)掺杂碲钨酸盐玻璃光谱性能的研究

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量子电子学报 2024年第2期41卷 378-387页

作者：陈安民马飞云崔令江张鹏王传杰威海长和光导科技有限公司威海市光纤预制棒工程技术研究中心山东威海264200 哈尔滨工业大学(威海)材料科学与工程学院山东威海264209 宏安集团有限公司技术部山东威海264200

为得到热稳定性能良好且高强度发光的碲酸盐玻璃,通过在TeO_(2)-ZnO-Na_(2)O系统中掺入WO_(3),以提高玻璃的抗析晶和热稳定性能。研究结果表明,碲酸盐玻璃的ΔT从不掺WO_(3)的110℃增加到了WO_(3)含量为20 mol%时的142℃。在热稳定性研... 详细信息

为得到热稳定性能良好且高强度发光的碲酸盐玻璃,通过在TeO_(2)-ZnO-Na_(2)O系统中掺入WO_(3),以提高玻璃的抗析晶和热稳定性能。研究结果表明,碲酸盐玻璃的ΔT从不掺WO_(3)的110℃增加到了WO_(3)含量为20 mol%时的142℃。在热稳定性研究的基础上,进一步分别研究了单掺Er^(3+)和Er^(3+)/Yb^(3+)共掺的碲钨酸盐玻璃的光谱性质。研究结果表明,在Er^(3+)/Yb^(3+)共掺条件下,Er^(3+)/Yb^(3+)之间的能量传递提高了Er^(3+)离子对980 nm泵浦光的吸收效率,增强了1.5μm波段发光强度,最终得到了具有高强度1.5μm波段发光的Er^(3+)/Yb^(3+)共掺碲钨酸盐玻璃,初步证明共掺方式是实现1.5μm波段高强度发光的有效方法。

关键词：光通信碲钨酸盐玻璃光谱性能能量传递热稳定性

维普期刊数据库博看期刊

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角布鲁斯特效应

Science Bulletin 2024年第14期69卷 2170-2173页

作者：薛淑雯陈浩杰王笑凡胡传捷殷玉杭朱杉陈焕阳 Institute of Electromagnetics and Acoustics and Department of Physics College of Physical Science and TechnologyXiamen UniversityXiamen 361005China Department of Physics Xiamen University MalaysiaSepang 439000Malaysia Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area Shenzhen 518000China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore

The Brewster reflectionless effect stands out as one of the simplest yet pivotal discoveries in manipulating waves[1,2].Initial investigations were limited to isotropic materials,but later,thanks to the advent of metamaterials,the phenomenon was found to expand into anisotropic *** anomalous Brewster effect has been recently demonstrated in metamaterials with rotation angle,thus increasing the number of degrees of freedom[3].In materials without magnetic responses,the Brewster effect exclusively applies to transverse-magnetic(TM,or p-wave polarization)waves[4].

关键词： materials 布鲁斯 effect

Structure and formation of the South Yellow Sea water mass in the spring of 2007

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Journal of Oceanology and Limnology 2022年第1期40卷 55-65页

作者： Xinyuan DIAO Guangcheng SI chuanjie WEI Fei YU Institute of Oceanology Chinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Key Laboratory of Ocean Circulation and Waves Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Laboratory for Ocean and Climate Dynamics Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

Data obtained from over 250 CTD stations in December 2006 and April 2007 were used to analyze the temperature and salinity structure of the water masses of the South Yellow Sea in *** basic water masses were identifi ed:the Southwest Yellow Sea Coastal Water Mass(SWYSCWM),Southwest Yellow Sea Local Water Mass(SWYSLWM),Qingdao Cold Water Mass(QDCWM),Yellow Sea Warm Current Water Mass(YSWCWM),Inchon Cold Water Mass(ICWM),and Subei Coastal Water Mass(SBCWM).The mechanisms of formation of these water masses are very diff *** SWYSCWM is aff ected by continental water,whereas the SWYSLWM and SBCWM are local water masses that are less aff ected by other *** QDCWM derives from cold northern *** YSWCWM exists from winter to *** of the limited data coverage,the mechanism of formation of the ICWM remains unclear.

关键词： Yellow Sea spring water mass formation

膜分离技术在中药现代化中的应用:进展、难点及发展方向

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应用化工 2024年第9期53卷 2134-2138,2144页

作者：褚琴丹王建宇方传杰朱利平浙江大学绍兴研究院大健康材料分中心浙江绍兴312000 浙江大学膜与水处理技术教育部工程研究中心浙江杭州310030 浙江大学高分子科学与工程学系浙江杭州310030

综述了膜技术在中药现代化进程中包括有效成分的提取和浓缩、中药制剂的制备等方面的应用,探讨了膜技术在中药制药中面临的挑战,基于膜污染与使用寿命、规模化应用等提出了解决思路。针对目前膜技术在中药现代化中的应用多数仍处于实验... 详细信息

综述了膜技术在中药现代化进程中包括有效成分的提取和浓缩、中药制剂的制备等方面的应用,探讨了膜技术在中药制药中面临的挑战,基于膜污染与使用寿命、规模化应用等提出了解决思路。针对目前膜技术在中药现代化中的应用多数仍处于实验探索研究阶段这一现状,从膜材料创新等角度结合可持续发展、绿色制药等理念对未来的发展方向作了展望。

关键词：中药现代化膜分离技术药物活性成分精准医疗绿色智造

玉米秸秆生物炭电极用于微生物燃料电池脱硫反硝化性能

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环境工程学报 2024年第3期18卷 718-726页

作者：闫佳丽张铭川陈熙陈传杰徐新阳蒋绍妍东北大学资源与土木工程学院沈阳110819 辽宁生态工程职业学院林学院沈阳110101

研究了玉米秸秆生物炭作为微生物燃料电池电极的性能。阳极以S2-为单一电子供体,阴极以NO3-为电子受体,以碳毡为对照电极,考察玉米秸秆生物炭电极用于生物燃料电池同步脱硫反硝化的电化学性能、产电性能以及污染物去除能力,分析了不同... 详细信息

研究了玉米秸秆生物炭作为微生物燃料电池电极的性能。阳极以S2-为单一电子供体,阴极以NO3-为电子受体,以碳毡为对照电极,考察玉米秸秆生物炭电极用于生物燃料电池同步脱硫反硝化的电化学性能、产电性能以及污染物去除能力,分析了不同硫氮质量浓度比对生物炭电极微生物燃料电池脱氮除硫效率以及输出电能的影响。结果表明,玉米秸秆生物炭电极微生物燃料电池实现了更高的交换电流密度(22.42×10^(-3)A·cm^(-2))和更低的电荷转移电阻(4.24Ω)。与碳毡电极相比,玉米秸秆生物炭电极微生物燃料电池最大输出电压和最大功率密度分别提升了18.91%和16.67%。当硫氮比为5:4时,反应器脱硫反硝化和产电能力最佳。阳极室S2-出水质量浓度由120 mg·L^(-1)降至1.08 mg·L^(-1),去除率为99.1%,其中76.52%转化为SO_(4)^(2-)-S,阴极室NO_(3)^(-)-N去除率为94.5%。此时反应器输出电压和功率密度也达到最大值,分别为450.68 mV和1.03 W·m^(-2)。

关键词：微生物燃料电池生物炭脱硫反硝化电催化

Spatial and temporal variability of turbulent mixing in the near-field of the Changjiang River

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Journal of Oceanology and Limnology 2020年第4期38卷 1138-1152页

作者： WANG Jianfeng YU Fei REN Qiang WEI chuanjie CAS Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Pilot National Laboratory for Marine Science and Technology(Qingdao) Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China

Based on field hydrological,microstructural,and shipboard Acoustic Doppler Current Profiler data,we quantified the spatial and temporal variability of turbulent mixing in the near-field Changjiang(Yangtze)River *** surface dissipation rate(ε)changed by three orders of magnitude from near-field(10^-4 W/kg)to far-field(10^-7 W/kg)plumes,indicating a decrease with distance from the river *** the river plume,εchanged with depth to 10^-8 W/kg,and increased to 10^-6 W/kg at the layer where the Taiwan Warm Current(TWC)***,εin the near-field plume showed three layers:surface layer in the river plume,middle layer,and lower TWC *** the river plume,the strongestεand turbulent diffusivity(Kz)were greater than 10^-4 W/kg and 10^-2 m^2/s,respectively,during strong ebb tides.A three-orders-of-magnitude change inεand Kz was observed in the tidal *** depth of the halocline changed with tidal cycles,and stratification(N 2)varied by one order of *** in the TWC layer followed the distribution of the halocline,which is opposite to the dissipation *** currents led to intrusion and turbulent mixing in the TWC *** ebb tides,εand Kz were as strong as those measured in the river plume,but did not last as *** structure of the velocity shear was similar to the dissipation rate in both the river plume and TWC layer,whereas the velocity shear in the TWC layer did not match the stratification *** the high dissipation rate area,the gradient Richardson number was smaller than the critical value(Ri g<1/4).The Ri g structure was consistent with shear and dissipation distributions,indicating that turbulent mixing in the near-field plume was controlled by a combination of shear induced by the discharged river flow and tidal current.

关键词： Changjiang River near-field plume turbulent mixing observation microstructure