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| 1 | Partitioning characteristics of gas channel of coal-rock mass in mining space and gas orientation method显示文摘In order to research the influence of coal-rock mass morphology of mining space on the flow law of gas,the laboratory physical model and numerical computation methods were adopted to simulate coal mining activities.The simulation results indicate that,after coal seam mining,the loose rock accumulation body of free caving,ordered rock arrangement body of plate damage rich in longitudinal and transverse fractures and horizontal fissure body formed by rock mass deformation imbalance are formed from bottom to top in the mining space.For these three types of accumulation bodies,there are essential differences in the accumulation state,rock size and gas breakover characteristics.According to this,the coal-rock mass in the mining space is classified into gas turbulence channel area,gas transitional flow channel area and gas seepage channel area.In the turbulence channel area,the gas is distributed transversely and longitudinally and gas diffuses in the form of convection with Reynolds number R_e more than100;in the transitional flow channel area,one-way or two-way gas channels are crisscross and gas is of transitional flow regime with R,.between 10 and 100.In the seepage channel area,there are a few vertical gas channels with R,.less than 10.In this paper,the researches on the gas orientation method in different partitions were further carried out,gas orientation methods of low-level pipe burying,middle-level interception and high-level extraction were determined and an on-site industrial test was conducted,achieving the effective diversion of gas and verifying the reasonableness of gas channel partition. | Zhao Zhiqiang Ma Nianjie Jia Housheng Cheng Yuanping | 2013 | International Journal of Mining Science and Technology2013，23，6： | 8 |
| 2 | Stability Analysis of Information Spreading on SNS Based on Refined SEIR Model显示文摘Investigating the stability of information spreading over SNS helps to understand the principles inherent in the spreading behavior.This paper explores the mechanisms of information spreading including stifling mechanism,latent mechanism and forgetting mechanism,establishes a refined SEIR model,and builds the corresponding mean-field equations.The methods of the differential dynamics and the next generation matrix are used to calculate the equilibriums and the basic reproductive number,and the asymptotical stability of the network equilibriums are proved theoretically.Simulation experiments are carried out to analyze the effect of the spreading mechanisms on the information spreading process and the results support our conclusions. | WANG Chao HU Yuanping LIU Chengyuan LIU Zhihong MA Jianfeng | 2014 | China Communications2014，11，11： | 2 |
| 3 | High-order com-pact splitting multisymplectic method for the coupled non-linear Schrddinger equations 显示文摘 | Ma Yuanping Kong Linghua Hong Jialin | 2011 | Comput Math with Ap-pl2011，61，2： | 1 |
| 4 | P2HBT:Partially Policy Hidden E-Healthcare System with Black-Box Traceability显示文摘Electronic health record(EHR),as the core of the e-healthcare system,is an electronic version of patient medical history,which records personal healthrelated information.EHR embodies the value of disease monitoring through large-scale sharing via the Cloud service provider(CSP).However,the health data-centric feature makes EHR more preferable to the adversaries compared with other outsourcing data.Moreover,there may even be malicious users who deliberately leak their access privileges for benefits.An e-healthcare system with a black-box traceable and robust data security mechanism is presented for the first time.Specifically,we propose an effective P2 HBT,which can perform fine-grained access control on encrypted EHRs,prevent the leakage of privacy contained in access policies,and support tracing of traitors.Under the standard model,the scheme is proved fully secure.Performance analysis demonstrates that P2HBT can achieve the design goals and outperform existing schemes in terms of storage and computation overhead. | YING Zuobin SI Yuanping MA Jianfeng JIANG Wenjie XU Shengmin LIU Ximeng | 2021 | Chinese Journal of Electronics2021，30，2： | 0 |
| 5 | Achieving 16.68% efficiency ternary as-cast organic solar cells显示文摘State-of-the-art organic solar cells(OSCs)often require the use of high-boiling point additive or post-treatment such as temperature annealing and solvent vapor annealing to achieve the best efficiency.However,additives are not desirable in largescale industrial printing process,while post-treatment also increases the production cost.In this article,we report highly efficient ternary OSCs based on PM6:BTP-Cl Br1:BTP-2O-4Cl-C12(weight ratio=1:1:0.2),with 16.68%power conversion efficiency(PCE)for as-cast device,relatively close to its annealed counterpart(17.19%).Apart from obvious energy tuning effect and complementary absorption spectra,the improved PCE of ternary device is mainly attributed to improved morphological properties including the more favorable materials miscibility,crystallinity,domain size and vertical phase separation,which endorse suppressed recombination.The result of this work provides understanding and guidance for high-performance as-cast OSCs through the ternary strategy. | Ruijie Ma Yang Tao Yuzhong Chen Tao Liu Zhenghui Luo Yuan Guo Yiqun Xiao Jin Fang Guangye Zhang Xiaojun Li Xia Guo Yuanping Yi Maojie Zhang Xinhui Lu Yongfang Li He Yan | 2021 | Science China Chemistry2021，64，4： | 0 |
| 6 | Electronic polarization in dipolar organic molecular semiconductors:The case study of 1,2,3,4-tetrafluoro-6,7-dimethylnaphthalene crystal显示文摘Electronic polarization has an important impact on the site energies of charge carriers that play a key role in determining the charge transport in organic semiconductors.Dipolar molecules have strong intermolecular interactions and widespread applications in organic optoelectronics.Howeve r,compared with nonpolar organic semiconductors,electronic polarization for dipolar systems has been rarely studied.Here,taking 1,2,3,4-tetrafluoro-6,7-dimethylnaphthalene as representative,we have calculated the electronic polarization energies of dipolar organic molecular crystals by means of a polarizable forcefield method.Surprisingly,our results point to that the polarization energies for this dipolar system are similar to those of nonpolar systems.In addition,theπ-πstack contributes only about 30%~40%to the total polarization energy,thus the polarization effects along the three dimensions should be treated equally even for the one-dimensional stacking crystals. | Xiaoyi Ma Yuanping Yi | 2020 | Chinese Chemical Letters2020，31，3： | 0 |
| 7 | Method of Monitoring Three-dimensional Mining Surface Deformation Based on InSAR显示文摘In order to solve the problems of small monitoring range,long time and high cost of existing sedimentation observation methods,based on two-view sentinel No.1 radar images of Guqiao mining area in Huainan City from November 4,2017 to November 28,2017,surface change information was obtained in combination with D-InSAR,and the three-dimensional surface deformation was monitored by two-pass method and single line of sight D-InSAR method.The results show that during the research period of 24 d,the maximum deformation of the mining area reached 71 mm,and the southern subsidence was the most obvious,which was in line with the mining subsidence law.The maximum displacement from the north to the south was about 250 mm,while the maximum displacement from the east to the west was about 80 mm,and the maximum subsidence in the center was 110 mm.It is concluded that D-InSAR technique has a good effect on the inversion of the mining subsidence,and this method is suitable for three-dimensional surface monitoring in areas with similar geological conditions.The monitoring results have certain reference value. | Ling QUAN Zijie LONG Zongyao MA Kangda CHEN Xueliang CHEN Yuanping XU Jiale LIU | 2024 | Meteorological and Environmental Research2024，15，1： | 0 |
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