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| 1 | Development and validation of THM coupling model of methane-containing coal显示文摘Based on nine necessary basic assumptions for THM coupling model,this research comprehensively applied the theories of elastic mechanics,seepage mechanics and heat transfer,and established a real three-field and two-way coupled mathematical model to reveal the connections among seepage field,deformation field and temperature field within the system of methane-containing coal.In comparison between numerical and analytical solutions,the coupling modeling for THM of methane-containing coal was proved to be correct by model application in the physical simulation experiment of coal and gas outburst.The model established in this paper was the improvement of traditional seepage theory of methane-containing coal and fluid-solid coupled model theory,which can be widely used in prevention of coal and gas outburst as well as exploitation of coal bed methane. | Tao Yunqi Xu Jiang Liu Dong Liang Yongqing | 2012 | International Journal of Mining Science and Technology2012，22，6： | 2 |
| 2 | Rapid and high precision measurement of opto-thermal relaxation with pump-probe method显示文摘Opto-thermal relaxation is one of the most important properties of nonlinear optical materials.Rapid and high precision measurement of this parameter is vital in both fundamental research and applications.Current measurement uses either complicated structure with poor precision or high power heating source with low efficiency.Here,we propose a pump-probe method(PPM) to optically measure the thermal relaxation using whispering gallery mode(WGM) microcavities.When the pump laser shines on a microcavity,the materials absorb the input power resonantly and heat up.Then the heat dissipates from the cavities to the surroundings.The opto-thermal effect induces a refractive index change reflected in the signal light transmission spectra.By analyzing the curve character of the transmission spectra of the signal response in the spontaneous relaxation process,the thermal relaxation time can be rapidly measured with high precision.Additionally,we systematically verify the PPM using microtoroids under various pump powers and at various locking points of the signal laser mode.The small rate of refractive index changes($10à8) can be discerned with an input pump power as low as 11.816 l W.Hence,the PPM can be used to detect refractive index perturbation,like gas or liquid sensing,temperature fluctuations with ultra-high sensitivity and be applied to optical materials analysis efficiently. | Tao Wang Xiao-Fei Liu Yunqi Hu Guoqing Qin Dong Ruan Gui-Lu Long | 2018 | Science Bulletin2018，63，5： | 2 |
| 3 | Briarane-type diterpenoids from the China gorgonian coral Subergorgia reticulate显示文摘 | JIN Yang ZHANG Si QIA Shuhua PAN Yunqi TAO Shuhong YIN Hao LI Qingxin | 2007 | Biochem Syst Ecol2007，35，11： | 1 |
| 4 | Acoustic emission charac- teristic during rock fatigue damage and failure 显示文摘 | Xu Jiang Li Shuchun Tao Yunqi | 2009 | Procedia Earth and Planetary Science2009，，9： | 1 |
| 5 | Acoustic emission char- acteristic during rock fatigue damage and failure 显示文摘 | Xu Jiang Li Shuchun Tao Yunqi | 2009 | Procedia Earth and Planetary Science2009，1，： | 1 |
| 6 | The marriage of dual-acceptor strategy and C-H activation polymerization:naphthalene diimide-based n-type polymers with adjustable molar mass and decent performance显示文摘The development of readily accessible high-mobility n-type semiconducting polymers is in great demand for realizing highperformance p-n junction-based organic electronics.In this study,we demonstrate that with the combination of dual-acceptor strategy and C-H direct arylation polymerization(DAr P),unipolar n-type semiconducting polymers can be conveniently synthesized.By tuning the monomer concentration,three dual-acceptor polymers,namely,poly(naphthalene diimide-alt-dithiophenyl pyrrolopyrrole-dione)(PNDI-DPP),poly(naphthalene diimide-alt-dithiophenyl isoindigo)(PNDI-IID),and poly(naphthalene diimide-alt-dithiophenyl bezothiadiazole)(PNDI-BT)can be obtained via C-H activation with decent number average molecular weight of~10 to 30 kg mol^(-1)and relatively narrow polydispersity index of~2.In addition,these polymers are defect-free in nature as evidenced by the nuclear magnetic resonance.Moreover,we attribute the different molar masses of the three copolymers under the same DAr P condition to the differentα-C-H acidity,which may stem from different electronwithdrawing capability of the hydrogenated acceptor units.Furthermore,the influence of the hydrogenated acceptor monomers on the optical,electrochemical and charge transporting properties is comprehensively studied.Among the three dual-acceptor polymers,PNDI-BT demonstrates the highest electron mobilities of up to 0.6 cm^(2)V^(-1)s^(-1)in unipolar n-type organic transistors because of its relatively planar backbone,larger overlaps of the lowest unoccupied molecular orbital and strong H-aggregation.Note that the transistor performance of PNDI-BT synthesized via C-H activation in this study is at least comparable to the one made by conventional C(sp^(2))-C(sp^(2))Stille or Suzuki cross-coupling polymerization.This study demonstrates the presented protocol can be a useful platform for sustainable and convenient synthesis of high-performance n-type semiconducting polymers. | Ying-Han Zhao Wenhao Li Tao Shen Yan Zhao Yunqi Liu Yang Wang | 2023 | Science China Chemistry2023，66，2： | 0 |
| 7 | Space-time evolution rules study on acoustic emission location in rock under cyclic loading显示文摘An acoustic emission(AE)location experiment was performed on sandstone using an advanced AE test system.The space-time evolution rule regarding damage was analyzed under cyclic loading as well as AE.The results show that AE on static loading process is consistent with the damage evolution rule of compression and the elastic-plastic deformation phase;at the beginning of cyclic loading with low duration time and energy,AE events came from a small crack.The location result showed that most events occurred in the core zone forming at the static loading process,and the location points changed slowly.AE energy changed little during the metaphase of cyclic process.There was a modest increase of location points in every cycle.The tendency of steady development could be predicted from the AE location events.At the end of each cyclic loading,the quantity of AE events and energy increased quite rapidly,reaching a maximum at the last cycle.AE events had high energy and duration time.Location events changed quite rapidly and assembled and linked continuously in the core zone.At the same time,they expanded to the top of specimen.A macroscopic crack finally formed.In the postfailure process,some AE events still existed due to fracturing of gliding friction.Owing to the inner stress balance of rock even after loading stopped,minor AE events still occurred. | Jiang XU Xiaojun TANG Shuchun LI Yunqi TAO Yongdong JIANG | 2009 | Frontiers of Structural and Civil Engineering2009，3，4： | 0 |
| 8 | Redistribution process of precipitation in ecological restoration activity of Pinus sylvestris var.mongolica in Mu Us Sandy Land,China显示文摘Precipitation is the most important water resource in semi-arid regions of China.The redistribution of precipitation among atmospheric water,soil water and groundwater are related to the land surface afforested ecological system.The study took widely replanted Pinus sylvestris var.Mongolica(PSM)in Mu Us Sandy Land(MUSL)as a research object and monitored precipitation,soil moisture,sap flow,and deep soil recharge(DSR)to find out moisture distribution in shallow soil layers.Results showed that the restoration process of PSM in MUSL changed the distribution of precipitation,with part of it infltrating downward as DsR and part of it being stored in the shallow soil.Consequently,evapotranspiration increased and DsR significantly decreased,resulting in up to 466.9 mm of precipitation returning to the atmosphere through evapotranspiration in 2016.Vegetation increased soil water storage(SwS)capacity,with maximum SWS in PSM plot and bare sandy land(BSL)being 260 mm and 197 mm per unit horizontal area,respectively in 2016.DSR decreased from 54%of precipitation in the BSL plot to 0.2%of precipitation in the PSM plot in 2016.A great portion of infiltrated water was stored in the PSM ecosystem,resulting in a time lag of infiltration to reach the deep soil layer,and the infiltration rate in the BSL plot was 11 times of that in the PSM plot.SWS decreased 16 mm and 7.6 mm per unit horizontal area over a one-year period(from March to October,non-freezing time)in 2017 and 2019,respectively.The PSM annual sap flow was maintained at a relatively constant level of 154 mm/yr.Through in-situ measurement and comparative analysis of the precipitation redistribution of the BSL plot and the PSM plot,we find that PSM can significantly reduce the shallow soil water storage and DSR.However,substantial reduction of shallow soil water storage and DsR is detrimental for the long-term development of PSM forest.Therefore,it is necessary to reduce PSM density to cut the water consumption by PSM per unit area,thus to augment the shallow SWS and DSR,which will be beneficial for the PSM to survive under extreme drought conditions in the future.This study helps us understand the role of precipitationinduced groundwater recharge in the process of vegetation restoration in semi-arid regions and explains thepossiblecauses of PSM forest degradation. | Yiben Cheng Hongbin Zhan Wenbin Yang Wei Feng Qi Lu Yunqi Wang Qunou Jiang Bin Wang Mingchang Shi Tao Wang Zhiming Xin Ruifang Hao | 2023 | International Soil and Water Conservation Research2023，11，3： | 0 |
| 9 | Research progress and application of deep in-situ condition preserved coring and testing显示文摘With the depletion of shallow resources,the exploration of deep earth resources has become a global strategy.The study of the different patterns in the physical mechanical properties of rocks at different occurrence depths is the basis for exploring deep into the earth,with the core and premise being the acquisition and testing of deep in-situ core specimens.Based on the original idea of deep in-situ condition preserved coring(ICP-Coring)and testing,combined with theoretical modeling,numerical analysis,test platform development,indoor testing and engineering application,the principles and technologies of deep ICP-Coring are developed.This principle and technology consists of five parts:in-situ pressurepreserved coring(IPP-Coring),in-situ substance-preserved coring(ISP-Coring),in-situ temperaturepreserved coring(ITP-Coring),in-situ light-preserved coring(ILP-Coring),and in-situ moisturepreserved coring(IMP-Coring).The theory and technology of temperature and pressure reconstruction at different occurrence depths and in different environments are proposed,and prototype trial production was completed by following the principle of displacement and tests based on the in-situ reconstructed environment.The notable advances are as follows:(1)Deep in-situ coring system:A pressure-preserved controller with an ultimate bearing capacity greater than 140 MPa,highperformance(temperature-resistant,pressure-resistant,and low thermally conductive)temperaturepreserved materials,an active temperature control system,and high-barrier quality-preserved membrane materials were developed;a deep ICP-Coring capacity calibration platform was independently developed,a deep in-situ coring technology system was developed,and the acquisition of deep in-situ cores was realized.(2)In-situ storage displacement system:Following the dual-circuit hydraulic design idea,a single-drive source push-pull composite grabbing mechanism was designed;the design of the overall structure for the deep in-situ displacement storage system and ultrahigh pressure cabin structure was completed,which could realize docking the coring device and core displacement in the in-situ reconstructed environment.(3)Test analysis system:A noncontact acoustic-electric-magnetic test system was developed under the in-situ reconstructed environment,and the errors between the test results and traditional contact test results were mostly less than 10%;a detachable deep in-situ core true triaxial test system was developed,which could perform loading tests for deep in-situ cores.The relevant technological achievements were successfully applied to the exploration and development of deep resources,such as deep mines,deep-sea natural gas hydrates,and deep oil and gas.The research results provide technical and equipment support for the construction of a theoretical system for deep in-situ rock mechanics,the development of deep earth resources and energy,and the scientific exploration of different layers and occurrence depths(deep and ultradeep)of the Earth. | Heping Xie Yunqi Hu Mingzhong Gao Ling Chen Ru Zhang Tao Liu Feng Gao Hongwei Zhou Xiaobo Peng Xiongjun Li Jianbo Zhu Cunbao Li Ruidong Peng Yanan Gao Cong Li Jianan Li Zhiqiang He | 2023 | International Journal of Mining Science and Technology2023，33，11： | 0 |
| 10 | Biocompatible and breathable healthcare electronics with sensing performances and photothermal antibacterial effect for motion-detecting显示文摘With the booming development of smart wearable devices,flexible multifunctional composites with high sensitivity and well health therapy have evoked great interest for next-generation healthcare electronics.However,the weak biocompatibility,low breathability,and narrow sensing range greatly hinder the development of healthcare sensors.Herein,a porous,flexible and conductive MXene/Polydimethylsiloxane/Polydopamine/Polyurethane Sponge(MXene/PDMS/PDA/PU)nanocomposite is developed as a promising motion-detecting device with good flexibility,breathability,sensing performance,photothermal therapy and antibacterial activity.Benefiting from the porous structure and biocompatible surface,this multifunctional sensor is further fabricated into a diagnostic and therapeutic system for monitoring human body motion and performing hot therapy/antibacterial treatment in the application of sports injury site.Moreover,both the wireless smart insole and cushion are constructed to gait monitoring and sit position detecting.This multifunctional hybrid sponge not only demonstrates great potential for motion monitoring sensors but also exhibits wide potential in wearable medical assistive and therapeutic systems. | Xinyi Wang Yan Tao Shaoshan Pan Xue Fang Congcong Lou Yunqi Xu Jianpeng Wu Min Sang Liang Lu Xinglong Gong Tianzhi Luo Shouhu Xuan | 2022 | npj Flexible Electronics2022，6，1： | 0 |
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