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70篇 您的检索式:作者名="LIU DaMeng"
    题名 作者 年代 出处 被引量
1Advanced characterization of pores and fractures in coals by nuclear magnetic resonance and X-ray computed tomography显示文摘This paper demonstrates capabilities of low-field nuclear magnetic resonance (NMR) and microfocus X-ray computed tomography (μCT) in advanced, nondestructive, and quantitative characterization of pore types, producible porosity, pore structure, and spatial disposition of pore-fractures in coals. Results show that the NMR transverse relaxation time (T2) at 0.5–2.5, 20–50, and >100 ms correspond to pores of <0.1 μm, >0.1 μm, and fractures, respectively. A much higher T2 spectrum peak reflects a much better development of pores (or fractures) corresponding to the T2, and vice versa. Three basic components in coals, i.e., the pores (or fractures), coal matrix, and minerals have their distinctive range of CT numbers. Among these, the CT number of pores is commonly less than 600 HU. The producible porosity, which is a determination of permeability, can be calculated by T2 cutoff value (T2C) of coal NMR. The coal pore structure can be efficiently estimated by the newly proposed 'T2C based model'. Finally, μCT scan was proven capable of modeling and spatial visualization of pores and fractures.YAO YanBin, LIU DaMeng, CAI YiDong & LI JunQian School of Energy Resources, China University of Geosciences, Beijing 100083, China 2010Science China Earth Sciences2010,53,6:61
2A Comprehensive Model for Evaluating Coalbed Methane Reservoirs in China显示文摘摘要:Coalbed 甲烷水库(CBMR ) 评估为为 coalbed 甲烷探索和生产选择未来的目标区域是重要的。这研究瞄准识别典型参数和方法评估 CBMR。基于地质的调查,实验室大小和领域工作,为 CBMR 评估的一个四水平的分析层次过程(AHP ) 模型被建议。在这个模型,不同重量根据三个主要标准被优先考虑并且分配(包括水库物理性质,存储能力和地质的特征) , 15 亚标准,和 18 种技术选择;哪个以后详细被讨论。模型被使用在 Qinshui 盆评估 Permo 含碳的煤的 CBMR,诺思中国。这个官方补给底的模糊 AHP 全面模型能被用于中等高度的等级的 CBMR 的评估(吝啬的最大的 vitrinite 反射 >0.5%) 在中国的煤区域。YAO Yanbin LIU Dameng TANG Dazhen HUANG Wenhui TANG Shuheng CHE Yao 2008Acta Geologica Sinica(English Edition)2008,82,6:19
3Microvesicle-delivery miR-150 promotes tumorigenesis by up-regulating VEGF,and the neutralization of miR-150 attenuate tumor development显示文摘Tumor-associated macrophages(TAMs)mostly exhibit M2-like(alternatively activated)properties and play posi-tive roles in angiogenesis and tumorigenesis.Vascular en-dothelial growth factor(VEGF)is a key angiogenic factor.During tumor development,TAMs secrete VEGF and other factors to promote angiogenesis;thus,anti-treatment against TAMs and VEGF can repress cancer development,which has been demonstrated in clinical trials and on an experimental level.In the present work,we show that miR-150 is an oncomir because of its promotional effect on VEGF.MiR-150 targets TAMs to up-regulate their secre-tion of VEGF in vitro.With the utilization of cell-derived vesicles,named microvesicles(MVs),we transferred an-tisense RNA targeted to miR-150 into mice and found that the neutralization of miR-150 down-regulates miR-150 and VEGF levels in vivo and attenuates angiogenesis.There-fore,we proposed the therapeutic potential of neutralizing miR-150 to treat cancer and demonstrated a novel,natu-ral,microvesicle-based method for the transfer of nucleic acids.Yuchen Liu Luming Zhao Dameng Li Yuan Yin Chen-Yu Zhang Jing Li Yujing Zhang 2013Protein & Cell2013,4,12:18
4Microstructure and mechanical properties of Ti Al Si N nano-composite coatings deposited by ion beam assisted deposition显示文摘TiAlSiN nano-composite coatings with Silicon contents from 4.1 to 23.9 at.% were deposited on Silicon wafers. The nanohardness, microstructure, and adhesion force of the coatings were deeply affected by Silicon contents. The TiAlSiN with 9.0 at.% Silicon has a maximum hardness of 40.9 GPa, a highest adhesion force of 67 N and a lowest friction coefficient of 0.5. Microstructures show that Silicon doping increases the hardness of coating due to solid solution hardening effect and grain boundary enhancement effect. The amorphous Si3N4 matrix, which contains(Ti,Al)N nano-crystals, is formed as the Silicon content is increased. The matrix contributes to the nano-hardness and helps to resist surface oxidization. Especially, the matrix induces low surface roughness and decreases the friction coefficient.SU Kang LIU DaMeng SHAO TianMin 2015Science China(Technological Sciences)2015,58,10:10
5Small non-coding RNAs transfer through mammalian placenta and directly regulate fetal gene expression显示文摘Jing Li Yujing Zhang Dameng Li Yuchen Liu Danping Chu Xiaohong Jiang Dongxia Hou Ke Zen Chen-Yu zhang 2015Protein & Cell2015,6,6:9
6Maturity Control on the Patterns of Hydrocarbon Regeneration from Coal显示文摘Rock-Eval pyrolysis and Py-GC experiments on naturally and artificially matured coal samples were carried out. The results suggest that both depolymerization and defuctionalization exist during the maturation and evolution of coal. The patterns of hydrocarbon regeneration are diverse at different stages of the maturation and evolution. When the vitrinite reflectance (R0) is 0.7%-0.9%, bitumen is the richest in coal while activation energy is the minimum, and the temperature of peak yield is lower than that of primary hydrocarbon generation. However, if reflectance is greater than 0.9%, defunctionalization predominates and the temperature of peak regeneration is shown in lagging compared with the primary hydrocarbon generation. When reflectance is out of the 'oil window', the peak temperature of hydrocarbon regeneration and that of the primary hydrocarbon generation seems to be continuous.ZOU Yanrong YANG Qi LIU Dameng KANG Xidong TANG Dazhen 2000Acta Geologica Sinica(English Edition)2000,74,2:6
7Pore structure of selected Chinese coals with heating and pressurization treatments显示文摘Pore structure of Chinese coals with heating and pressurization treatments was studied using small angle X-ray scattering(SAXS),N2adsorption/desorption isotherms and scanning electron microscope(SEM).SAXS was performed for some samples after heat treatment at seven elevated temperatures from 25 to 250°C at 0 MPa and for other samples with hydrostatic pressure treatment at 0,5,10,15 and 20 MPa at the room temperature.The results show that N2adsorption isotherm together with SAXS could be a comprehensive method to evaluate the pore shape and the pore size distribution:the pore shapes are generally spherical for low rank coal and they are mainly ellipsoidal for high rank coal.All these measurements were then interpreted using the fractal theory to reveal relationship between surface fractals and coal rank,and the evolution of surface fractals under heating and pressurization treatments.The results show that surface fractal dimension(Ds)changes with different treating temperature and pressure and maximum vitrinite reflectance(Ro,m).Especially in the bituminous stage,Ds shows an increasing trend with Ro,m under varied temperatures.Moreover,Ds shows an increasing trend with increasing temperature before 200°C,and a decreasing trend after 200°C.Furthermore,the results show that Ds has a more complex relationship with Ro,m under varied treating temperature than that under varied treating pressure.CAI YiDong LIU DaMeng PAN ZheJun YAO YanBin LI JunQian QIU YongKai 2014Science China Earth Sciences2014,57,7:5
8Coal petrology and genesis of Jurassic coal in the Ordos Basin,China显示文摘简单结构和浅埋葬深度描绘的厚煤床的多重集合在 Ordos 盆的早、中间的侏罗记阶层被开发,西北的中国。这高质量的煤的巨大的储备有高商业的价值。我们学习了煤岩石学的特征和它的 maceral 分发到决定 macerals 贡献到油和气体的产生。结果证明因为主要是在上面的河的系统的一系列高看台的沼泽地的盆唯一的 depositional 环境,在 Ordos 盆的侏罗记煤有特殊 petrological 特征。这些 petrographic 特征是一些沙身体被移植河形成的典型内陆湖的发展的结果。在埋葬以后,泥炭继续经历氧化条件,产生广泛的更高的 inertinite 在煤满足的这个过程和 vitrinite 部件被改变到 semi-vitrinite。这些侏罗记煤的宏观的 petrographic 类型主要是半迟钝的煤,迟钝的煤, semilustrous 和有光泽的煤。半迟钝的煤和迟钝的煤的比例在盆边缘是更高的,特别在北边缘附近的区域。semilustrous 和有光泽的煤的数字向南并且向中央盆增加。这种状况显示不同形成煤的沼泽地环境让学生在煤部件上控制效果。另一观察是在 Ordos 煤序列,特别在更低的部分,一些沙岩床是厚的,直到有一种粗糙的谷物尺寸的 20 m。在 macerals 的更高的 fusinite 内容与更多的完全、常规的植物房间结构伴随一个更高的 semi-vitrinite 内容。fusinite 结构清楚、很好保存。在埋葬以后,房顶和地板岩石的岩性学能继续影响煤岩石学的进化。在房顶和地板的沙身体展出好物理条件以便毛孔水能维持氧化,循环和连接的一个长期的状态到煤。煤部件因此很长时间留在氧化环境。在盆中心,在埋葬和随后的煤床很快进入了减少的环境以后,相反地,开发的湖的外形和泥炭被 mudstone 很快盖住。作为结果,丰富的胶凝化作用发生了, vitrinite 内容增加了。Exinite 经常在煤床上在一个特定的位置积累了。尽管平均 exinite 内容不总体上高,它显著地确实贡献全部的烃产生。exinite 内容被低估了,特别非结晶的沥青的液体和它的重要性这里被强调。原因是液体容易流进有强壮的刚硬的 fusinite,或流进一些裂缝,在它通常被忽视的地方。Weihua Ao Wenhui Huang Chengmin Weng Xiuling Xiao Dameng Liu Xiuyi Tang Ping Chen Zhigen Zhao Huan Wan Robert B.Finkelman 2012Geoscience Frontiers2012,3,1:3
9Coal reservoir characteristics and coalbed methane resource assessment in Huainan and Huaibei coalfields, Southern North China显示文摘Dameng Liu Yanbin Yao Dazhen Tang Shuheng Tang Yao Che Wenhui Huang 2009International Journal of Coal Geology2009,,3:3
10Pore structure and its impact on CH 4 adsorption capacity and flow capability of bituminous and subbituminous coals from Northeast China显示文摘Yidong Cai Dameng Liu Zhejun Pan Yanbin Yao Junqian Li Yongkai Qiu 2013Fuel2013,,:2
11Petrophysical characterization of coals by low-field nuclear magnetic resonance (NMR)显示文摘Yanbin Yao Dameng Liu Yao Che Dazhen Tang Shuheng Tang Wenhui Huang 2009Fuel2009,,7:2
12Rapid thin-layer WS_(2) detection based on monochromatic illumination photographs显示文摘The thickness of two-dimensional(2D)nanomaterials shows a significant effect on their optical and electrical properties.Therefore,a rapid and automatic detection technology of 2D nanomaterials with desired layer-number is required to extend their practical application in optoelectronic devices.In this paper,an image recognition technology was proposed for rapid and reliable identification of thin-layer WS_(2) samples,which combining a layer-thickness identification criterion and a novel image segmentation algorithm.The criterion stemmed from optical contrast study of monochromatic illumination photographs,and the algorithm was based on Canny operator and edge connection iteration.This optical identification method can seek out thin-layer WS_(2) samples on complex surfaces,which provides a promising approach for automatic search of thin-layer nanomaterials.Xiangmin Hu Cuicui Qiu Dameng Liu 2021Nano Research2021,14,3:2
13Preliminary evaluation of the coalbed methane production potential and its geological controls in the Weibei Coalfield, Southeastern Ordos Basin, China 显示文摘YAO Yanbing LIU Dameng TANG Dazhen 2009International Journal of Coal Geology2009,78,1:1
14Fractalcharacterization of adsorption–pores of coals from North China:aninvestigation on CH4 adsorption capacity of coals显示文摘YAO Yanbing LIU Dameng TANG Dazhen 2008InternationalJournal of Coal Geology2008,73,1:1
15Fractal Characterization of Adsorption-pores of Coals from North China:an Investigation on CH4 Adsorption Capacity of Coals显示文摘Yao Yanbin Liu Dameng Tang Dazhen 2008International Journal of Coat Geology2008,73,:1
16Microscopic characteristics of microfractures in coals:an investigation into permeability of coal显示文摘Yao Yanbin Liu Dameng 2009Procedia Earth and Planetary Science2009,1,1:1
17Non-destructive characterization of coal samples from China using microfocus X-ray computed tomography显示文摘Yao Yanbin Liu Dameng Che Yao 2009International Journal of Coal Geology2009,80,2:1
18Fraetal characterization of adsorption-pores of coals from North China:An investigation on CH4 adsorption capacity 显示文摘Yao Yanbin Liu Dameng Tang Dazhen 2008International Journal of Coal Geology2008,73,:1
19Petrophysical characterization of coals by low-field nuclear magnetic resonance (NMR)显示文摘Yao Yanbin Liu Dameng Che Yao 2010Fuel2010,89,7:1
20Stady on coalbed methane accumulation characteristics and favorable areas in the Binchang area, southwestern Ordos Basin, China 显示文摘Xu Hao Tang Dazhen Liu Dameng 2012International Journal of Geology2012,95,:1
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