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International Journal of Mining science and Technology 2015年第5期25卷 755-760页

作者： Liu Jian Liu Zegong Xue Junhua Gao Kui Zhou Wei State Key Laboratory of deep Coal Mining & Environmental Protection School of Energy and Safety Anhui University of Science & Technology Key Laboratory of Safety and High-efficiency Coal Mining Ministry of EducationAnhui University of Science & Technology

In order to solve the problems of top-coal inadequate destruction and large amounts of gas emission in mining extra thick and hard coal seam,this study investigated the pre-splitting for deep borehole blasting and gas pre-draining technologies on top *** mechanism of the technologies was systematically expounded based on hard top-coal cracks development obtained by numerical simulation and theoretical *** results show that explosive blasting in the hard rock results in a large number of cracks and large displacement in the rock mass due to the effect of explosion ***,the thick top-coal caves,and desorbing gas flows along the cracks improve gas ***,the pre-splitting for deep borehole blasting and gas pre-draining technologies was applied in No.3802 working face of Shui Liandong Coal Mine,which increases monthly output in the face to 67.34 kt and the drained gas concentration to 86.2%.The drained gas average concentration from each borehole reaches 40%,and the effect is remarkable.

关键词： deep borehole blasting Fully mechanized mining Hard thick coal seam Top-coal pre-splitting Gas extraction

Li,Na,and Cs-based metal-organic frameworks for room temperature phosphorescence applications

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science China Chemistry 2025年

作者： Jiaqi Ma Rui Feng Yanyuan Jia Mingshi Zhang Shuo Guo College of Chemistry and Chemical Engineering Inner Mongolia University School of Materials science and Engineering Smart Sensing Interdisciplinary Science Center Nankai University & TKL of Metal and Molecule Based Material Chemistry Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University Department of Chemistry and Biochemistry University of California San Diego

The conventional design of metal-organic frameworks (MOFs) with room-temperature phosphorescence (RTP) mostly relies on using heavy metals,as the heavy atom effect can effectively increase the efficiency of intersystem crossing (ISC) to get a better phosphorescence *** the first time,we reported the highly efficient RTP of a lithium-based MOF IMU-101 with a lifetime (τ) of 299 ms and a quantum yield (QY) of 4.91%.In addition,MOFs IMU-102 and IMU-103,with sodium and cesium as metal nodes,were successfully *** phosphorescence properties of this series of alkali metal MOFs were systematically studied and *** crystallography and computational calculation show that the mechanism for achieving RTP for this material lies in the ultrashort coordination bond of Li,which enables the reduction of non-radiative ***-101,as a cheap and environmentally friendly room-temperature phosphorescent material,has been further developed into composite polymer inks and bulk *** makes them promising for applications in anti-counterfeiting and information encryption.

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Metal-organic frameworks (MOFs) in aqueous batteries (ABs):unlocking potential through innovative materials design

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science China Chemistry 2025年

作者： Bo Han Erhai Hu Bei-Er Jia Ziyang Liu Shuen Tso Afriyanti Sumboja Ivandini T.Anggraningrum Anne Zulfia Syahrial Qingyu Yan SCARCE Laboratory Energy Research Institute NTU (ERIN) Nanyang Technological University School of Materials science and Engineering Nanyang Technological University Material science and Engineering Research Group Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Department of Chemistry University of Indonesia Metallurgical & Materials Engineering Department Fakultas Teknik Universitas Indonesia

Metal-organic frameworks (MOFs) represent a revolutionary class of materials in the field of energy storage,particularly for aqueous batteries (ABs).Distinguished by their large surface area,tuneable porosity,and adaptable chemical activity,MOFs offer significant advantages over conventional materials in battery *** article provides a thorough analysis of the crucial role that MOFs play in improving the efficiency of *** includes a concise review of the current research progress,emphasizing the fundamental processes by which MOFs enhance electrochemical ***,the review examines the synthesis and design strategies for the structure of MOFs to maximize ion transport,improve conductivity,and enhance *** structural advantages,chemical versatility,stability,durability and functionalization potential of MOFs are comprehensively ***,we explore the distinct advantages of MOFs in overcoming common challenges encountered in ABs,such as declining capacity,inadequate cycling stability,and limited energy *** paper also highlights the future research directions needed to fully harness their *** goal is to develop a fundamental understanding and stimulate further progress in the use of MOFs for advanced energy storage solutions.

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Mixing processes and patterns of fluids in alkane-CO_(2)-water systems under high temperature and high pressure——Microscopic visual physical thermal simulations and molecular dynamics simulations

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science China Earth sciences 2023年第7期66卷 1622-1646页

作者： Guanghui YUAN Shuqi WU Yingchang CAO Zihao JIN Keyu LIU Yanzhong WANG National Key Laboratory of deep Oil and Gas China University of PetroleumQingdao 266580China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China

Various types of geofluids exist in deep and ultra-deep layers in petroliferous *** geofluids are much more active under high-temperature and high-pressure(HTHP)conditions,but their properties are *** simulated the mixing of different fluids in CH_(4)/C_(3)H_(8)/C_(6)H_(14)/C_(8)H_(18)-water systems and C_(6)H_(14)/C_(8)H_(18)-CO_(2)-H_(2)O systems at temperatures of 25℃ to 425℃ and pressures of 5 MPa to 105 MPa,using an in-situ micron quartz capillary tube thermal simulation system and molecular dynamics numerical simulation *** mixing processes,patterns,and mechanisms of various fluids were analyzed at microscale under increasing temperature and pressure *** results show that the miscibility of fluids in the different alkane-H_(2)O and alkane-CO_(2)-H_(2)O systems is not instantaneous,but the miscibility degree between different fluid phases increases as the temperature and pressure rise during the *** physical thermal experiments(PTEs)show that the mixing process can be divided into three stages:initial miscibility,segmented dynamic miscibility,and complete *** molecular dynamics numerical simulations(MDNSs)indicate that the mixing process of fluids in the alkane-H_(2)O and alkane CO_(2)-H_(2)O systems can be divided into seven and eight stages,*** carbon number affects the miscibility of alkanes and water,and the temperature and pressure required to reach the same miscibility stage with water increase with the carbon number(C_(3)H_(8),C_(6)H_(14),CH_(4),C_(8)H_(18)).CO_(2) has a critical bridge role in the miscibility of alkanes and water,and its presence significantly reduces the temperatures required to reach the initial,dynamic,and complete miscibility of alkanes and *** results are of great significance for analyzing and understanding the miscibility of geofluids in deep and ultra-deep HTHP systems.

关键词： High temperature high pressure(HTHP) Alkane-H_(2)O-CO_(2)system Mixing of geofluids In-situ visualization thermal experiments Molecular dynamics numerical simulation

The low-latitude sodium layer:comparative data from lidar observations at Hainan,China and São Paulo,Brazil

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Earth and Planetary Physics 2025年第1期9卷 39-53页

作者： Fang Wu Jing Jiao GuoTao Yang LiFang Du ZhengKuan Liu HaoRan Zheng JiXin Guo ShaoHua Gong YaJun Zhu State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China Hainan National Field science Observation and Research Observatory for Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China University of Chinese Academy of sciences Beijing 100049China China-Brazil Joint Laboratory for Space Weather NSSC/INPESão Josédos Campos 12227-010Brazil School of Physics and Electronics Engineering Hainan Normal UniversityHaikou 571158China

Physical and chemical processes observed in the mesosphere and thermosphere above the Earth’s low latitudes are complex and highly interrelated to activity in the low-latitude *** sodium detected by lidar can yield clues to dynamic and chemical processes in these spatial layers above the Earth’s *** paper is based on sodium layer data collected at two low-latitude stations,one in the northern hemisphere and one in the *** low-latitude sodium layer exhibits conspicuous seasonal variations in shape,density,and altitude;these variations are similar between Earth’s hemispheres:sodium layer density at both stations reaches its seasonal maximum in autumn and minimum in ***,maximal Na density over Brazil is greater than that over *** variations of Na density above the two low-latitude stations are also similar;at both,maxima are observed before *** variations of the Na layer over Brazil that differ from those observed in the northern hemisphere may be related to the South Atlantic Magnetic Anomaly(SAMA)or fountain *** suggest that low-latitude Na layer data may provide useful additional evidence that could significantly improve the low-latitude part of the WACCM-Na model.

关键词： metallic sodium layer seasonal variation nocturnal variation lidar

State of the art review of the large deformation rock bolts

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Underground Space 2022年第3期7卷 465-482页

作者： Qiru Sui Manchao He Pengfei He Min Xia Zhigang Tao State Key Laboratory for GeoMechanics and deep Underground Engineering China University of Mining and Technology(Beijing)Beijing 100083China Institute for deep Underground science and Engineering China University of Mining and Technology(Beijing)Beijing 100083China School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing 100083China

Rock bolting technique is an important reinforcement measure in the geotechnical engineering *** rock bolts have been continuously emerging through the development of rock supporting *** conditions,such as high crustal stress,extremely soft rock,and strong mining disturbance often occur in the deep mining,resulting in large deformation of the surrounding rock *** the deformation of traditional rock bolts is generally below 200 mm,failure often occurs to the rock bolts because of insufficient *** effectively control the large deformation of surrounding rock masses caused by complex conditions,it is necessary to develop large deformation rock bolts with high constant resistance,also called energy-absorbing *** paper systematically reviews the development of large deformation rock bolts and the structure,energy absorption mechanism,anchorage performance,and mechanical properties of several typical large deformation rock *** advantages and disadvantages of existing large deformation rock bolts are compared and the concept of constant resistance large deformation support is introduced.

关键词： Rock bolt Energy absorbing Constant resistance Large deformation

Effects of prebiotics on the fermentation of traditional suancai of Northeast China

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Food science and Human Wellness 2024年第3期13卷 1358-1367页

作者： Mingwei Zhao Xinying Cao Yuzheng Wu Sibo Zou Zhigao Li Xinping Lin Chaofan Ji Liang Dong Sufang Zhang Chenxu Yu Huipeng Liang National Engineering Research Center of Seafood Collaborative Innovation Center of Provincial and Ministerial Co-construction for Deep ProcessingCollaborative Innovation Center of Seafood Deep ProcessingSchool of Food Science and TechnologyDalian Polytechnic UniversityDalian 116034China Department of Agricultural and Biosystems Engineering Iowa State UniversityIA 50011USA

Suancai is a traditional fermented vegetable widely consumed in Northeast *** this study,different prebiotics were used to improve the quality of *** prebiotics(inulin(INU),xylooligosaccharide(XO S),galactooligosaccharide(GOS),and stachyose(STA))were shown to reduce the pH value and increase the content of total titratable acidity(TTA)in suancai,while the contents of most organic acids were also *** addition of prebiotics had significant effects on the bacterial microbiota during the suancai fermentation *** prebiotics were shown to contribute to the growth of *** suancai sample with fructooligosaccharides(FOS)had the highest relative abundance of ***,INU and XOS could increase the abundance of *** evaluate the quality of suancai fermented with prebiotics,profiles of volatile flavor compounds(VOCs)and free amino acids(FAA)were *** prebiotics affected the VOCs and FAA profiles via transforming the bacterial *** addition,the addition of prebiotics also changed the taste profiles of the suancai *** study is among the first attempts to reveal the effects of different prebiotics on suancai fermentation,and the findings provide a foundation to develop new ways for improving the quality of suancai.

关键词： Bacterial microbiota Lactic acid bacteria Flavor Amino acid Taste

Numerical simulation of the temperature field within new type of monolayer freezing-shaft lining

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Mining science and Technology 2010年第2期20卷 198-203页

作者： CHEN, Xiaoxiang YANG, Weihao school of energy science and engineering henan polytechnic universityjiaozuo 454000china state key laboratory of geomechanics and deep underground engineering china university of mining & technology state key laboratory of geomechanics and deep underground engineering china university of mining & technologyxuzhou 221008china

Numerical simulation was used to estimate the temperature field within a poured concrete,mono-layer freezing-shaft *** affects from various factors were *** maximum temperature within the lining increases as the lining thickness increases,decreases as the soil-side wall temperature decreases,decreases as the air temperature inside the shaft decreases and decreases as the air velocity inside the shaft *** compression speed of an insulating foam layer affects the maximum temperature difference between the interior and the *** maximum temperature difference between the interior and the sidewalls approaches or exceeds the maximum allowable for the curing of poured concrete *** should be paid to the question of the lining cracking during the curing *** temperature gradient in the vertical direction may be minimized by preventing air contact against the steel connection board supporting the base of the freshly poured section.

关键词： new type monolayer freezing shaft lining temperature field numerical simulation

Mass transport deposits and processes in the north slope of the Xisha Trough,northern South China Sea

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Acta Oceanologica Sinica 2015年第9期34卷 117-125页

作者： QIN Zhiliang WU Shiguo WANG Dawei LI Wei GONG Shaojun MI Lijun SPENCE George Tianjin Research Institute for Water Transport Engineering Ministry of Transport Laboratory of Marine Geophysics and deep Sea Georesource Sanya Institute of Deep-sea Science and EngineeringChinese Academy of Sciences Tianjin Exploration Center of Marine Geology Department of Exploration China National Offshore Oil Corporation School Earth & Ocean sciences University of Victoria

Triple mass-transport deposits （MTDs） with areas of 625, 494 and 902 km^2, respectively, have been identified on the north slope of the Xisha Trough, northern South China Sea margin. Based on high-resolution seismic reflection data and multi-beam bathymetric data, the Quaternary MTDs are characterized by typical geometric shapes and internal structures. Results of slope analysis showed that they are developed in a steep slope ranging from 5° to 35°. The head wall scarps of the MTDs arrived to 50 km in length （from headwall to termination）. Their inner structures include well developed basal shear surface, growth faults, stepping lateral scarps, erosion grooves, and frontal thrust deformation. From seismic images, the central deepwater channel system of the Xisha Trough has been filled by interbedded channel-levee deposits and thick MTDs. Therefore, we inferred that the MTDs in the deepwater channel system could be dominated by far-travelled slope failure deposits even though there are local collapses of the trough walls. And then, we drew the two-dimensional process model and three- dimensional structure model diagram af the MTDs. Combined with the regional geological setting and previous studies, we discussed the trigger mechanisms of the triple MTDs.

关键词： South China Sea mass transport deposits submarine slides gravity flow deepwater channel system

Scattering Law Analysis Based on Hapke and Lommel-Seeliger Models for Asteroidal Taxonomy

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Research in Astronomy and Astrophysics 2017年第10期17卷 83-90页

作者： Xiang-Jie Huang Xiao-Ping Lu Jian-Yang Li Bao Mei Chih-Hao Hsia Hai-Bin Zhao Macao University of science and Technology Lunar and Planetary science Laboratory Macao University of Science and Technology - Partner Laboratory of Key Laboratory of Lunar and Deep Space Exploration Chinese Academy of Sciences Key Laboratory of Planetary sciences Chinese Academy of Sciences Planetary science Institute Purple Mountain Observatory Chinese Academy of Sciences

In deriving the physical properties of asteroids from their photometric data, the scattering law plays an important role, although the shape variations of asteroids result in the main variations in lightcurves. By following the physical behaviors of light reflections, Hapke et al. deduced complex functions to represent the scattering process, however, it is very hard to accurately simulate the surface scattering law in reality. For simplicity, other numerical scattering models are presented for efficiently calculating the physical properties of asteroids, such as the Lommel-Seeliger （LS） model. In this article, these two models are compared numerically. It is found that in some numerical applications the LS model in simple form with four parameters can be exploited to replace the Hapke model in complex form with five parameters. Furthermore, the generated synthetic lightcurves by the Cellinoid shape model also show that the LS model can perform as well as the Hapke model in the inversion process. Finally, by applying the Principal Component Analysis （PCA） technique to the parameters of the LS model, we present an efficient method to classify C and S type asteroids, instead of the conventional method using the parameters of the Hapke model.

关键词： scattering -- techniques: photometric -- minor planets -- asteroids: general