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Geoscience Frontiers 2014年第1期5卷 83-93页

作者： Wei ju Guiting hou School of Earth and Space Science Peking University The Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of Education

The South Tianshan Orogen and adjacent regions of Central Asia are located in the southwestern part of the Central Asian Orogenic Belt. The formation of South Tianshan Orogen was a diachronous, scissors-like process, which took place during the Palaeozoic, and its western segment was accepted as a site of the final collision between the Tarim Craton and the North Asian continent, which occurred in the late Palaeozoic. However, the post-collisional tectonic evolution of the South Tianshan Orogen and adjacent regions remains debatable. Based on previous studies and recent geochronogical data, we suggest that the final collision between the Tarim Craton and the North Asian continent occurred during the late Carboniferous. Therefore, the Permian was a period of intracontinental environment in the southern Tianshan and adjacent regions. We propose that an earlier, small-scale intraplate orogenic stage occurred in late Permian to Triassic time, which was the first intraplate process in the South Tianshan Orogen and adjacent regions. The later large- scale and well-known Neogene to Quaternary intraplate orogeny was induced by the collision between the India subcontinent and the Eurasian plate. The paper presents a new evolutionary model for the South Tianshan Orogen and adjacent regions, which includes seven stages：（I） late Ordovician-early Silurian opening of the South Tianshan Ocean; （11） middle Silurian-middle Devonian subduction of the South Tianshan Ocean beneath an active margin of the North Asian continent; （111） late Devonian-late Carboniferous closure of the South Tianshan Ocean and collision between the Kazakhstan-Yili and Tarirn continental blocks; （IV） early Permian post-collisional magmatism and rifting; （V） late Permian-Triassic the first intraplate orogeny; （Vt） jurassic-Palaeogene tectonic stagnation and （VII） Neocene-Quaternary intraplate orogeny.

关键词： Central Asian Orogenic Belt Northern Xinjiang South Tianshan Ocean Tectonics Tarim-North Asia collision

Insights into the Tectonic Fractures in the Yanchang Formation Interbedded Sandstone-Mudstone of the Ordos Basin Based on Core Data and Geomechanical Models

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Acta Geologica Sinica(English Edition) 2015年第6期89卷 1986-1997页

作者： ju Wei SUN Weifeng hou Guiting Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process Ministry of Education School of Resources and Geoscience China University of Mining and Technology School of Earth and Space Science Peking University The State Key Laboratory of Continental Tectonics and Dynamics Institute of Geology Chinese Academy of Geological Sciences PetroChina Research Institute of Petroleum Exploration and Development

The distribution and intensity of tectonic fractures within geologic units are important to hydrocarbon exploration and development. Taken the Upper Triassic Yanchang Formation interbedded sandstone-mudstone in the Ordos Basin as an example, this study used the finite element method（FEM） based on geomechanical models to study the development of tectonic fractures. The results show that the sandstones tend to generate tectonic fractures more easily than mudstones with the same layer thickness, and the highest degree of tectonic fractures will be developed when the sandstone-mudstone thickness ratio is about 5.0. A possible explanation is proposed for the tectonic fracture development based on two important factors of rock brittleness and mechanical layer thickness. Generally, larger rock brittleness and thinner layer thickness will generate more tectonic fractures. In interbedded sandstone-mudstone formations, the rock brittleness increases with the increasing mechanical layer thickness, hence, these two factors will achieve a balance for the development of tectonic fractures when the sandstone-mudstone thickness ratio reaches a specific value, and the development degree of tectonic fractures is the highest at this value.

关键词： tectonic fractures interbedded sandstone-mudstone formations sandstone-mudstonethickness ratio Yanchang Formation rock rupture value Ordos Basin

Electrochemical Determination of Reduced Glutathione at Multiwalled Carbon Nanotubes/Poly(bromocresol green) Modified Glassy Carbon Electrode

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Chemical Research in Chinese Universities 2011年第6期27卷 934-938页

作者： hou ju-ying AI Shi-yun College of Chemistry and Material Science Shandong Agricultural University Tai ＇an 271018 P. R. China

A multiwalled carbon nanotubes/poly(bromocresol green) modfied glassy carbon electrode (MWNTs-PBG/GCE) was used to investigate the electrochemical behavior of reduced glutathione(GSH). GSH showed an irreversible oxidation process on MWNTs-PBG/GCE with an oxidation peak at 0.77 V(vs. SCE) in a phosphate buffer solution(pH=4.0). The kinetic parameters of the electrochemical behavior of GSH on MWNTs-PBG/GCE were calculated. Under the optimal conditions and with the help of amperometric method, a linear relationship was obtained between the oxidation peak current and GSH concentration in the range from 2×10-7 mol/L to 5×10-6 mol/L with the detection limit as 1×10-8 mol/L(signal-to-noise ratio of 3). The current reached the steady-state current within about 5 s. The modified electrode surface had very good reproducibility and stability.

关键词： Poly(bromocresol green) Glutathione Electrode Multiwalled carbon nanotube

K/T boundary: Discussion of the platinum group elements as indicators of extraterrestrial materials

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Chinese Science Bulletin 1998年第19期43卷 1585-1593页

作者： Quanlin hou Peixue Ma Xin ju Chinese Acad Sci Inst Geol Lab Lithosphere Tecton Evolut Beijing 100029 Peoples R China Peking Univ Inst Heavy Ion Phys AMS Lab Beijing 100871 Peoples R China Chinese Acad Sci Inst High Energy Phys Beijing 100039 Peoples R China

Whether the platinum group elements (PGE) can be taken as the indicators of extraterrestrial materials is a very important and interesting scientific problem. It is discussed on the basis of systematic investigation and study of a great amount of related literature. The following conclusions can be obtained: (ⅰ) extraterrestrial impact event can cause the PGE anomaly; conversely, the PGE anomaly may not represent the existence of extraterrestrial impact event, because the PGE anomaly can be caused by many terrestrial events (e.g. volcanic activity); (ⅱ) the PGE anomaly, especially the global PGE anomaly can inspire us to think it from extraterrestrial event, but it may not be as useful as previously thought as unambiguous identifiers of large extraterrestrial impact event in the earth’s history.

关键词： platinum group elements (PGE) extraterrestrial impact event K/T boundary.

Response of Macromolecular Structure to Deformation in Tectonically Deformed Coal

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Acta Geologica Sinica(English Edition) 2013年第1期87卷 82-90页

作者： LI Xiaoshi ju Yiwen hou Quanlin FAN junjia Key Laboratory of Computational Geodynamics Chinese Academy of Sciences College of Earth Science University of Chinese Academy of Sciences PetroChina Research Institute of Petroleum Exploration and Development Key Laboratory of Basin Structure and Petroleum Accumulation

The structural evolution of tectonically deformed coals （TDC） with different deformational mechanisms and different deformational intensities are investigated in depth through X-ray diffraction （XRD） analysis on 31 samples of different metamorphic grades （R ： 0.7%-3.1%） collected from the Huaibei coalfield. The results indicated that there are different evolution characteristics between the ductile and brittle deformational coals with increasing of metamorphism and deformation. On the one hand, with the increase of metamorphism, the atomic plane spacing （d002） is decreasing at step velocity, the stacking of the BSU layer （Lc） is increasing at first and then decreasing, but the extension of the BSU layer （La） and the ratio of La/Lc are decreasing initially and then increasing. On the other hand, for the brittle deformational coal, d002 is increasing initially and then decreasing, which causes an inversion of the variation of Lc and La under the lower-middle or higher-middle metamorphism grade when the deformational intensity was increasing. In contrast, in the ductile deformational coals, d002 decreased initially and then increased, and the value of L~ decreased with the increase of deformational intensity. But the value of La increased under the lower-middle metamorphism grade and increased at first and then decreased under the higher-middle metamorphism grade. We conclude that the degradation and polycondensation of TDC macromolecular structure can be obviously impacted during the ductile deformational process, because the increase and accumulation of unit dislocation perhaps transforms the stress into strain energy. Meanwhile, the brittle deformation can transform the stress into frictional heat energy, and promote the metamorphism and degradation as well. It can be concluded that deformation is more important than metamorphism to the differential evolution of the ductile and brittle deformational coals.

关键词： tectonically deformed coal X-ray diffraction deformational mechanism deformationalintensity macromolecular structure

End Late Paleozoic tectonic stress field in the southern edge of junggar Basin

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Geoscience Frontiers 2012年第5期3卷 707-715页

作者： Wei ju Guiting hou Le Li Fangfeng Xiao The Key Laboratory of Orogenic Belts and Crustal Ew~lution Ministry of Education School of Earth and Space Science PekingUniversity Beijing 100871 China Institute of Oil and Gas Research Peking University Beijing 100871 China

This paper presents the end Late Paleozoic tectonic stress field in the southern edge of junggar Basin by interpreting stress-response structures （dykes, folds, faults with slickenside and conjugate joints）. The direction of the maximum principal stress axes is interpreted to be NW-SE （about 325°）, and the accommodated motion among plates is assigned as the driving force of this tectonic stress field. The average value of the stress index Rt is about 2.09, which indicates a variation from strike-slip to compressive tectonic stress regime in the study area during the end Late Paleozoic period. The reconstruction of the tectonic field in the southern edge of junggar Basin provides insights into the tectonic deformation processes around the southern junggar Basin and contributes to the further understanding of basin evolution and tectonic settings during the culmination of the Paleo- zoic.

关键词： Tectonic stress field junggar Basin End Late Paleozoic Stress-response structures Stress regime

Preparation and Characterization of Nano-Se/Silk Fibroin Colloids

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Chemical Research in Chinese Universities 2011年第1期27卷 158-160页

作者： hou ju-ying AI Shi-yun SHI Wei-jie College of Chemistry and Material Science Shandong Agricultural University Tai ＇an 271018 P. R. China

A solution-phase approach to the synthesis of nano-Se/silk fibroin colloids（NSeSFC） by reducing selenious acid solution with silk fibroin（SF） was proposed, and the composites were in situ prepared by macrowave method. The nanocomposites were characterized with ultraviolet-visible（UV-Vis） absorption spectrometry, resonance Rayleigh scattering（RRS） spectrometry and transmission electron microscopy（TEM）. The nano-Se（0） solution exhibited the strongest resonance Rayleigh scattering at 579 rim. Through the RRS discussion, we found the best preparation and conservation condition of NSeSFC. The TEM image shows the sizes of the Se（0） particles were about 50 nm and dispersed equably. The resulted NSeSFC exhibited good stability, and it can be kept for a long period.

关键词： Silk fibroin Red selenium nanoparticle Resonance Rayleigh scattering Transmission electron microscopy

Relationship between nano-scale deformation of coal structure and metamorphic-deformed environments

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Chinese Science Bulletin 2005年第16期50卷 1784-1795页

作者： ju Yiwen JIANG Bo hou Quanlin WANG Guiliang College of Mineral Resource and Geosciences China University of Mining and Technology Xuzhou 221008 China Laboratory of Computational Geodynamics College of Geosciences Graduate University of Chinese Academy of Sciences Beijing 100049. China

There is a more consanguineous relation be-tween nano-scale deformation of coal structure and meta-morphic-deformed environment. In different metamor-phic-deformed environments, deformation in the coal struc-ture can occur not only at micro-scale, but also at nano-scale, and even leads to the change of molecular structure and nano-scale pore (<100 nm) structure. The latter is the main space absorbing coalbed methane. Through X-ray diffraction (XRD) and liquid–nitrogen absorption methods, the charac-teristics of macromolecular and nano-scale pore structures of coals in different metamorphic-deformed environments and deformational series of coals have been studied. By combin-ing with high-resolution transmission electron microcopy (HRTEM), the macromolecular and nano-scale pore struc-tures are also directly observed. These results demonstrate that the stacking Lc of the macromolecular BSU in tectonic coals increases quickly from the metamorphic-deformed environment of low rank coals to that of high rank coals. For different deformed tectonic coals, in the same metamor-phic-deformed environment, the difference of Lc is obvious. These changes reflect chiefly the difference of different tem-perature and stress effect of nano-scale deformation in tec-tonic coals. The factor of temperature plays a greater role in the increase of macromolecular structure parameters Lc, the influence of stress factor is also important. With the stress strengthening, Lc shows an increasing trend, and La /Lc shows a decreasing trend. Therefore, Lc and La /Lc can be used as the indicator of nano-scale deformation degree of tectonic coals. With increasing temperature and pressure, especially oriented stress, the orientation of molecular structure be-comes stronger, and ordering degree of C-nets and the ar-rangement of BSU are obviously enhanced. For the deforma-tion of nano-scale pore structure, in the same metamor-phic-deformed environment, along with the strengthening of stress, the ratio of m

关键词：煤结构纳米变形大分子结构地质环境

Wind power forecasting based on improved variational mode decomposition and permutation entropy

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Clean Energy 2023年第5期7卷 1032-1045页

作者： Zhijian Qu Xinxing hou Wenbo Hu Rentao Yang Chao ju State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure East China Jiaotong University330013JiangxiChina College of Electrical and Automation Engineering East China Jiaotong University330013JiangxiChina

Due to the significant intermittent,stochastic and non-stationary nature of wind power generation,it is difficult to achieve the desired prediction ***,a wind power prediction method based on improved variational modal decomposition with permutation entropy is ***,based on the meteorological data of wind farms,the Spearman correlation coefficient method is used to filter the meteorological data that are strongly correlated with the wind power to establish the wind power prediction model data set;then the original wind power is decomposed using the improved variational modal decomposition technique to eliminate the noise in the data,and the decomposed wind power is reconstructed into a new subsequence by using the permutation entropy;with the meteorological data and the new subsequence as input variables,a stacking deeply integrated prediction model is developed;and finally the prediction results are obtained by optimizing the hyperparameters of the model algorithm through a genetic *** validity of the model is verified using a real data set from a wind farm in north-west *** results show that the mean absolute error,root mean square error and mean absolute percentage error are improved by at least 33.1%,56.1%and 54.2%compared with the autoregressive integrated moving average model,the support vector machine,long short-term memory,extreme gradient enhancement and convolutional neural networks and long short-term memory models,indicating that the method has higher prediction accuracy.

关键词： wind power prediction improved variational mode decomposition permutation entropy stacking deep learning