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Structural and fractal characterization of adsorption pores of middle–high rank coal reservoirs in western Yunnan and eastern Guizhou: An experimental study of coals from the Panguan syncline and Laochang anticline
Chongtao Wei,Gaoyuan Yan,Guanwen Lu,Junjian Zhang
- , 2019, DOI: 10.1177/0144598718790319
Abstract: To better understand the structural characteristic of adsorption pores (pore diameter？<？100 nm) of coal reservoirs around the coalbed methane production areas of western Yunnan and eastern Guizhou, we analyzed the structural and fractal characteristics of pore size range of 0.40–2.0 nm and 2–100 nm in middle–high rank coals (Ro,max？=？0.93–3.20%) by combining low-temperature N2/CO2 adsorption tests and surface/volume fractal theory. The results show that the coal reservoirs can be divided into three categories: type A (Ro,max？<？2.15%), type B (2.15%？<？Ro,max <2.50%), and type C (Ro,max？>？2.15%). The structural parameters of pores in the range from 2 to 100 nm are influenced by the degree of coal metamorphism and the compositional parameters (e.g., ash and volatile matter). The dominant diameters of the specific surface areas are 10–50 nm, 2–50 nm, and 2–10 nm, respectively. The pores in the range from <2 nm provide the largest proportion of total specific surface area (97.22%–99.96%) of the coal reservoir, and the CO2-specific surface area and CO2-total pore volume relationships show a positive linear correlation. The metamorphic degree has a much greater control on the pores (pore diameter less than 2 nm) structural parameters than those of the pore diameter ranges from 2 to 100 nm. Dv1 and Dv2 can characterize the structure of 2–100 nm adsorption pores, and Dv1 (volume heterogeneity) has a positive correlation with the pore structural parameters such as N2-specific surface area and N2-total pore volume. This parameter can be used to characterize volume heterogeneity of 2–10 nm pores. Dv2 (surface heterogeneity) showed type A？>？type B？>？type C and was mainly affected by the metamorphism degree. Ds2 can be used to characterize the pore surface heterogeneity of micropores in the range of 0.62–1.50 nm. This parameter has a good correlation with the pore parameters (CO2-total pore volume, CO2-specific surface area, and average pore size) and is expressed as type C？<？type B？<？type A. In conclusion, the heterogeneity of the micropores is less than that of the meso- and macropores (2–100 nm). Dv1, Dv2, and Ds2 can be used as effective parameters to characterize the pore structure of adsorption pores. This result can provide a theoretical basis for studying the pore structure compatibility of coal reservoirs in the region
低-中煤级构造煤纳米孔分形模型适用性及分形特征
Applicability of Fractal Models and Nano-Scale Pores Fractal Characteristics for Low-Middle Rank Tectonic Deformed Coals
宋昱,姜波,李凤丽,闫高原,么玉鹏
Song Yu, Jiang Bo, Li Fengli, Yan Gaoyuan, Yao Yupeng
地球科学(中国地质大学学报) , 2018, DOI: 10.3799/dqkx.2018.566
Abstract: 构造煤纳米孔非均质性研究对于揭示煤层气赋存状态和传输特性具有重要意义.选取低-中煤级典型序列构造煤样品，基于高压压汞和低温液氮相结合的方法计算了构造煤基质压缩系数，并分析了Menger、热力学、Sierpinski和FHH分形模型对构造煤的适用性，进一步揭示了孔隙分形特征，糜棱煤的Menger分形曲线呈现三段式分布，而对于原生煤、碎裂煤、片状煤、鳞片煤和揉皱煤而言，Sierpinski模型、Menger模型、热力学模型以及FHH模型分段点分别为100nm、72nm、72596nm和8nm.Menger模型分形维数大于3且拟合偏差较大，不适合表征构造煤的孔隙非均质性.Sierpinski模型适合于描述构造煤的纳米孔分形特征；FHH模型适合于表征原生煤及构造煤8～100nm的孔隙非均质性.Sierpinski模型微米孔(>100nm)的分形维数(Ds1)随着构造变形的增强先升高，而后降低，在片状煤中达到最高；Sierpinski模型纳米孔(<100nm，Ds2c)和FHH模型<8nm的孔隙的非均质性随构造变形的增强逐渐升高.原生煤和脆性变形煤中，Ds1>Ds2c，表明为微米孔非均质性强于纳米孔；鳞片煤中，Ds1接近于Ds2c；揉皱煤中，Ds1<Ds2c，表明纳米孔的非均质性强于微米孔.
The investigations of nanoporous heterogeneity in tectonically deformed coals are of significance for the study of occurrence state and transmission characteristics of coalbed methane (CBM). The lowmiddle rank tectonic deformed coals were screened out firstly in this study and then the matrix compressibility and the applicabilities of Menger, thermodynamics, Sierpinski, and FHH of tectonic deformed coals, as well as the fractal characteristics, were analyzed based on highpressure mercury intrusion and lowpressure gas adsorption.The fractal curves of Menger model for mylonitic coals can be divided into three stages. However, for primary coals,cataclastic coals, schistose coals, scaly coals, and wrinkle coals, the fractal curves of Sierpinski, Menger, thermodynamics, and FHH can be obviously divided into two stages and the piecewise points locates at 100nm, 72nm, 72596nm, and 8nm respectively. The fractal dimensions of Menger model are >3 and have a fitting deviation, so it is not suitable to characterize the pore heterogeneity. The Sierpinski model is suitable to characterize the fractal characteristics of the nanopore of the tectonic deformed coals whereas the FHH model is for the pores of 8-100nm in primary coals and various tectonic deformed coals. The fractal dimension (Ds1) of micron pores at Sierpinski fractal curve (>100nm) increases firstly and then decreases with the increase of tectonic deformation, reaching the highest values in schistose coals. The heterogeneity of both nanopores at Sierpinski fractal curve (<100nm，Ds2c) and that of pores of 8-100nm at FHH fractal curve increase with the enhancement of the tectonic deformation. In primary coals and brittle deformed coals, Ds1>Ds2c, indicating that the heterogeneity of micron pores are stronger than that of nanopores. In scaly coals, Ds1is close to Ds2c. In wrinkle coals, Ds1< Ds2c, indicating that the heterogeneity of nanopores is stronger than that of micron pores
The uncertain optimization algorithm to suppress vibration of the crankshaft system with random
Gaoyuan Yu,Jun Li,Liming Qin
- , 2019, DOI: 10.1177/1687814019833898
Abstract: This study proposes a new uncertain optimization algorithm to suppress vibration of the crankshaft system. In this new algorithm, the interval expression with random-interval hybrid variables is obtained by the confidence level. In addition, the interval order relation, interval probability, radial basis function neural network technology, and multi-objective genetic algorithm are applied to construct uncertain optimization algorithm with random-interval hybrid variables. Moreover, typical examples are used to demonstrate the effectiveness of the proposed algorithm. To suppress vibration of the crankshaft system, the optimization–Latin hypercube sampling design is used to obtain the experimental scheme and the data sampling is performed by multi-body system simulation of the vibration performance. Then, the radial basis function neural network is built considering the torsional displacement and transient stress of the crankshaft. Finally, the uncertain optimization algorithm is operated on the crankshaft structure design of the high-power reciprocating compressor. The results demonstrate that the robustness of the vibration performance and strength property is improved through the uncertain optimization algorithm, compared with that through deterministic optimization. The uncertain optimization algorithm to suppress vibration of the crankshaft system with random-interval hybrid variables is an efficient and effective approach, which is finally proved by the prototype test
Tectonic affinity of Zhongba terrane: Evidences from the detrital zircon geochronology and Hf isotopes
仲巴地体的板块亲缘性:来自碎屑锆石U-Pb年代学和Hf同位素的证据
SUN GaoYuan,HU XiuMian,
孙高远,胡修棉
岩石学报 , 2012,
Abstract: 仲巴地体位于青藏高原西南部,其南北两侧均为雅鲁藏布蛇绿岩或蛇绿混杂岩。仲巴地体主要由一套断续出露的前寒武系构造基底、古生代和三叠系地层组成,岩性主要包括石英砂岩、含白云母石英岩、泥质石英粉砂岩,白云母方解石片岩和大理岩等。岩相学揭示这套地层总体上为滨浅海-陆棚-外陆棚环境。碎屑锆石U-Pb年代学和Hf同位素分析表明,锆石年龄出现特征年龄峰值530Ma和950Ma,与西羌塘、特提斯喜马拉雅以及高喜马拉雅地体非常类似,并且950Ma左右的碎屑锆石群具有与上述地体上报道的同期碎屑锆石群相似的εHf(t)值和地壳模式年龄。这种碎屑锆石年龄和Hf同位素组成特征明显区别于拉萨地体,后者以出现约1170Ma的特殊年龄群为特征。基于碎屑锆石特征和沉积学研究,本文认为仲巴地体属于西羌塘-大印度-特提斯喜马拉雅构造体系,与拉萨地体具有不同的板块构造亲缘性。
Comparative Transcriptomes Profiling of Photoperiod-sensitive Male Sterile Rice Nongken 58S During the Male Sterility Transition between Short-day and Long-day
Wei Wang, Zhenwei Liu, Zhibin Guo, Gaoyuan Song, Qin Cheng, Daiming Jiang, Yingguo Zhu, Daichang Yang
BMC Genomics , 2011, DOI: 10.1186/1471-2164-12-462
Abstract: To investigate the transcriptome during the male sterility transition in PGMS rice, the transcriptome of Nongken 58S under short-day (SD) and long-day (LD) at the glume primordium differentiation and pistil/stamen primordium forming stages was compared. Seventy-three and 128 differentially expressed genes (DEGs) were identified at the glume primordium differentiation and pistil/stamen primordium forming stages, respectively. Five and 22 genes were markedly up-regulated (≥ 5-fold), and two and five genes were considerably down-regulated (≥ 5-fold) under SD during the male sterility transition. Gene ontology annotation and pathway analysis revealed that four biological processes and the circadian rhythms and the flowering pathways coordinately regulated the male sterility transition. Further quantitative PCR analysis demonstrated that the circadian rhythms of OsPRR1, OsPRR37, OsGI, Hd1, OsLHY and OsDof in leaves were obviously different between Nongken 58S and Nongken 58 under LD conditions. Moreover, both OsPRR37 and Hd1 in the inflorescence displayed differences between Nongken 58S and Nongken 58 under both LD and SD conditions.The results presented here indicate that the transcriptome in Nongken 58S was significantly suppressed under LD conditions. Among these DEGs, the circadian rhythm and the flowering pathway were involved in the male sterility transition. Furthermore, these pathways were coordinately involved in the male sterility transition in PGMS rice.Photoperiod-sensitive genic male sterile (PGMS) rice, Nongken 58S, was discovered as a spontaneous mutant in the japonica rice cultivar Nongken 58 (Oryza sativa ssp. japonica) grown in Hubei Province, China in 1973 [1]. It has since been used for production of hybrid rice, and during the past two decades, great achievements have been made in improving rice yields in China using two-line hybrid rice. Several important features of Nongken 58S have been characterised. Its fertility is highly regulated by day lengt
Enhanced hydrogen evolution from CuOx-C/TiO2 with multiple electron transport pathways
Gaoyuan Long,Meng Zhang,Runze Sun,Weirong Zhao,Xiuying Huang,Yifan Liu
- , 2019, DOI: 10.1371/journal.pone.0215339
Abstract:
Influence of mesophilic and thermophilic conditions on the anaerobic digestion of food waste: Focus on the microbial activity and removal of long chain fatty acids
Gaoyuan Shang,Guotao Sun,Kang Kang,Ling Qiu,Xiaohui Guo,Xiunan Yu
- , 2018, DOI: 10.1177/0734242X18801195
Abstract: The mesophilic reactor (MR) exhibited advantages in biogas production and performance stability over thermophilic reactor (TR) during the long-term anaerobic digestion (AD) of food waste (FW) with stepwise organic loading rate elevating. It was interesting to explore the mechanism causing the divergences in performances between these two reactors. The microbial activity was compared on day 110 when TR began to deteriorate. The results show that MR had significantly higher specific acetoclastic methanogenic activities (SAMA) and specific propionate and butyrate oxidative activities (SPOA and SBOA) than TR. The SAMA, SPOA and SBOA in TR were only 50.3%, 18.6% and 46.4% of those values in MR, respectively. Remarkably, the specific hydrogenotrophic methanogenic activity of 15.5±2.1, 15.7±4.6 mmol CH4·L？1 original slurry·d？1 in MR and TR was comparative with insignificant difference, which indicates that the microbial activity in TR had been inhibited widely apart from the hydrogenotrophic methanogenesis. Additionally, many particles with the diameters of 1–2 mm were observed to form in MR and identified as complexes of calcium and long chain fatty acids (LCFAs). The formation of calcium crystallization might alleviate the inhibition of LCFAs during AD of FW, which further supports the better performance in MR than TR
p53 dynamics orchestrates with binding affinity to target genes for cell fate decision
Baoqiang Chen,Chang Shao,Gaoyuan Lu,Guangji Wang,Haiping Hao,Hui Ye,Mengqiu Wu,Yuyu Yang,Zhiyuan Tang
- , 2017, DOI: 10.1038/cddis.2017.492
Abstract:
In Vitro Effects of Hollow Gold Nanoshells on Human Aortic Endothelial Cells
Chunrong Gu,Di Yang,Gaoyuan Ge,Hengfang Wu,Hua Lu,Jindan Xu,Xiangjian Chen,Xiongzhi Li,Zhiping Bian,Zhirui Guo
- , 2016, DOI: 10.1186/s11671-016-1620-5
Abstract: Gold nanoparticles are emerging as promising biomedical tools due to their unique nanoscale characteristics. Our purpose was to synthesize a hollow-shaped gold nanoparticle and to investigate its effect on human aortic endothelial cells (HAECs) in vitro. Hollow gold nanoshells with average 35-nm diameters and 10-nm shell thickness were obtained by galvanic replacement using quasi-spherical nanosilver as sacrifice-template. Our results showed that hollow gold nanoshells in the culture medium could be internalized into the cytoplasm of HAECs. No cytotoxicity effect of hollow gold nanoshells on HAECs was observed within the test concentrations (0–0.8 μg/mL) and test exposure period (0–72 h) by tetrazolium dye assay. Meanwhile, the release of cell injury biomarker, lactate dehydrogenase, was not significantly higher than that from control cells (without hollow gold nanoshells). The concentrations of vasodilators, nitric oxide, and prostacyclin I-2 were not changed, but the vasoconstrictor endothelin-1 was decreased by hollow gold nanoshells treatment in HAECs. HAECs exposed to hollow gold nanoshells resulted in suppressing expressions of genes involved in apoptosis and activating expressions of genes of adhesion molecules. Moreover, we demonstrated by in vitro endothelial tube formation that hollow gold nanoshells (0.8 μg/mL) could not inhibit angiogenesis by the HAECs. Altogether, these results indicate that the structure and major function of HAECs would not be disrupted by hollow gold nanoshell treatment
Synthetic lethal short hairpin RNA screening reveals that ring finger protein 183 confers resistance to trametinib in colorectal cancer cells
Chen Yao,Gaoyuan Wang,Jiangxue Wu,Jiaxin Lin,Lin Qiu,Ranyi Liu,Rong Geng,Shuai Chen,Wei Shi,Wenlin Huang,Xin Tan,Zhixiang Zuo,Zhizhong Pan
- , 2017, DOI: 10.1186/s40880-017-0228-1
Abstract: The online version of this article (doi:10.1186/s40880-017-0228-1) contains supplementary material, which is available to authorized users
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