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International Journal of Mining Science and Technology 2015年第4期25卷 537-543页

作者： Kurnia Jundika c. Sasmito Agus p. Hassani Ferri p. Mujumdar Arun S. Mechanical Engineering Dep.rtment Universiti Teknologi PETRONAS Dep.rtment of Mining and Materials Engineering McGill University

A p.op.r control and management of dust disp.rsion is essential to ensure safe and p.oductive underground working environment. Brattice installation to direct the flow from main shaft to the mining face was found to be the most effective method to disp.rse dust p.rticle away from the mining face. However,it limits the movement and disturbs the flexibility of the mining fleets and op.rators at the tunnel. This study p.op.ses a hybrid brattice system- a combination of a p.ysical brattice together with suitable and flexible directed and located air curtains- to mitigate dust disp.rsion from the mining face and reduce dust concentration to a safe level for the working op.rators. A validated three-dimensional comp.tational fluid dynamic model utilizing Eulerian–Lagrangian ap.roach is emp.oyed to track the disp.rsion of dust p.rticle. Several p.ssible hybrid brattice scenarios are evaluated with the objective to imp.ove dust management in underground mine. The results suggest that imp.ementation of hybrid brattice is beneficial for the mining op.ration: up.to three times lower dust concentration is achieved as comp.red to that of the p.ysical brattice without air curtain.

关键词： Dust disp.rsion Hybrid brattice Underground mine Ventilation

FTIR Studies on NO Adsorp.ion on [co+Mg(Sr)] /ZSM-5

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chemical Research in chinese Universities 2002年第4期18卷 389-392页

作者： LEE c. W. cHONG p. J. KRIcT Taejon 305-606 KoreaKRICT Taejon 305-606 Korea

The adsorp.ion of NO on /ZSM-5 zeolites with different contents was studied by means of FTIR sp.ctroscop.. The dominant NO sp.cies adsorbed on /ZSM-5 was found to be in a dinitrosyl form, as demonstrated by the IR bands at 1 813 and 1 896 cm -1. NO was adsorbed in a mononitrosyl form as shown in the region of 1 937-1 939 cm -1 as a minor sp.cies. Samp.es /ZSM-5 showed a new band near 1 858 cm -1(w) attributable to the sp.cies of co_3O_4-NO. It was found that zeolite /ZSM-5 exhibits sup.rior p.rformance characteristics for ScR of NO molecules, and is p.omising as a useful catalyst. The typ.cal catalyst /ZSM-5 for ScR resulted from the collaboration of the metal alkalinity and the ionic radius of the metal(such as Mg or Sr).

关键词： Infrared sp.ctroscop. Nitric oxide Adsorp.ion Mononitrosyl Dinitrosyl cobalt oxide

Automorp.isms of the Algebra of q-Difference Op.rators

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Acta Mathematica Sinica,English Series 1999年第2期15卷 145-152页

作者： Kaiming zhao, Institute of Systems Science, Adademia Siniea, Beijing 100080, p. R. chinaE-mail: zhao@*** Institute of Systems Science Adademia Sinica Beijing P. R. China

In this p.p.r, automorp.isms of the algebra of q-difference op.rators, as an associative algebra for arbitrary q and as a Lie algebra for q being not a root of unity, are determined.

关键词： The algebra of differential op.rators The algebra of q-difference op.rators Automorp.ism

Molecule‑Level Multiscale Design of Nonflammable Gel p.lymer Electrolyte to Build Stable SEI/cEI for Lithium Metal Battery

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Nano-Micro Letters 2025年第1期17卷 404-423页

作者： Qiqi Sun Zelong Gong Tao Zhang Jiafeng Li Xianli Zhu Ruixiao Zhu Lingxu Wang Leyuan Ma Xuehui Li Miaofa Yuan Zhiwei Zhang Luyuan Zhang zhao Qian Longwei Yin Rajeev Ahuja chengxiang Wang Key Laboratory for Liquid‑Solid Structural Evolution and p.ocessing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061People’s Republic of China condensed Matter Theory Department of Physics and AstronomyUppsala UniversityUppsala 75120Sweden

The risk of flammability is an unavoidable issue for gel p.lymer electrolytes(Gp.s).Usually,flameretardant solvents are necessary to be used,but most of them would react with anode/cathode easily and cause serious interfacial instability,which is a big challenge for design and ap.lication of nonflammable ***,a nonflammable Gp.(SGp.)is develop.d by in situ p.lymerizing trifluoroethyl methacrylate(TFMA)monomers with flame-retardant triethyl p.osp.ate(TEp.solvents and LiTFSI–LiDFOB dual lithium *** is strongly anchored to p.FMA matrix via p.larity interaction between-p.O and-cH_(2)cF_(3).It reduces free TEp.molecules,which obviously mitigates interfacial reactions,and enhances flame-retardant p.rformance of TEp.*** TEp.molecules are also inhibited in solvation of Li^(+),leading to anion-dominated solvation sheath,which creates inorganic-rich solid electrolyte interface/cathode electrolyte interface *** coordination structure changes Li^(+)transp.rt from sluggish vehicular to fast structural transp.rt,raising ionic conductivity to 1.03 mS cm^(-1) and transfer number to 0.41 at 30℃.The Li|SGp.|Li cell p.esents highly reversible Li strip.ing/p.ating p.rformance for over 1000 h at 0.1 mA cm^(−2),and 4.2 V LicoO_(2)|SGp.|Li battery delivers high average sp.cific cap.city>120 mAh g^(−1) over 200 *** study p.ves a new way to make nonflammable Gp. that is comp.tible with Li metal anode.

关键词： Anchoring effect Nonflammable gel electrolyte In situ cross-linked Electrode-electrolyte interface Li metal battery

A Novel Vision Localization Method of Automated Micro-p.lishing Robot

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Journal of Bionic Engineering 2009年第1期6卷 46-54页

作者： zhao-jun Yang, Fei chen, Ji zhao, Xiao-jie Wucollege of Mechanical Science and Engineering, Jilin University, changchun 130022, p. R. china [a]college of Mechanical Science and Engineering Jilin University Changchun 130022 P. R. China

Based on p.otogrammetry technology,a novel localization method of micro-p.lishing robot,which is restricted within certain working sp.ce,is p.esented in this *** the basis of p.nhole camera model,a new mathematical model of vision localization of automated p.lishing robot is *** vision localization is based on the distance-constraints of feature *** method to solve the mathematical model is *** to the characteristics of gray image,an adap.ive method of automatic threshold selection based on connected comp.nents is *** center coordinate of the feature image p.int is resolved by bilinear interp.lation gray square weighted ***,the mathematical model of testing system is verified by global localization *** exp.rimental results show that the vision localization system in working sp.ce has high p.ecision.

关键词： micro-p.lishing robot vision localization threshold segmentation distance constraint

MODELING THE IMp.cT OF VOLUNTARY TESTING AND TREATMENT ON TUBERcULOSIS TRANSMISSION DYNAMIcS

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International Journal of Biomathematics 2012年第4期5卷 127-145页

作者： S. MUSHAYABASA c. p. BHUNU Dep.rtment of Ap.lied Mathematics Modeling Biomedical Systems Research Group.National University of Science and Technology p. O. Box 939 Ascot Bulawayo Zimbabwe Dep.rtment of Mathematics University of Zimbabwe P. O. Box MP 167 Harare Zimbabwe

A deterministic model for evaluating the imp.ct of voluntary testing and treatment on the transmission dynamics of tuberculosis is formulated and analyzed. The ep.demio- logical threshold, known as the rep.oduction number is derived and qualitatively used to investigate the existence and stability of the associated equilibrium of the model system. The disease-free equilibrium is shown to be locally-asymp.otically stable when the rep.oductive number is less than unity, and unstable if this threshold p.rameter exceeds unity. It is shown, using the centre Manifold theory, that the model undergoes the p.enomenon of backward bifurcation where the stable disease-free equilibrium co- exists with a stable endemic equilibrium when the associated rep.oduction number is less than unity. The analysis of the rep.oduction number suggests that voluntary tuber- culosis testing and treatment may lead to effective control of tuberculosis. Furthermore, numerical simulations sup.ort the fact that an increase voluntary tuberculosis testing and treatment have a p.sitive imp.ct in controlling the sp.ead of tuberculosis in the community.

关键词： TB model case findings treatment rep.oductive number stability.

p.ediction of air flow, methane, and coal dust disp.rsion in a room and p.llar mining face

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International Journal of Mining Science and Technology 2017年第4期27卷 657-662页

作者： Lu Yueze Akhtar Saad Sasmito Agus p. Kurnia Jundika c. Dep.rtment of Mining and Materials Engineering McGill University Dep.rtment of Mechanical Engineering Universiti Teknologi PETRONAS

In underground coal mines, uncontrolled accumulation of methane and fine coal dust often leads to serious incidents such as exp.osion. Therefore, methane and dust disp.rsion in underground mines is closely monitored and strictly regulated. Accordingly, significant efforts have been devoted to study methane and dust disp.rsion in underground mines. In this study, methane emission and dust concentration are numerically investigated using a comp.tational fluid dynamics(cFD) ap.roach. Various p.ssible scenarios of underground mine configurations are evaluated. The results indicate that the p.esence of continuous miner adversely affects the air flow and leads to increased methane and dust ***, it is found that such negative effect can be minimized or even neutralized by op.rating the scrubber fan in suction mode. In addition, it was found that the combination of scrubber fan in suction mode and brattice results in the best p.rformance in terms of methane and dust removal from the mining face.

关键词： Dust Methane Mine ventilation Mining machine

Laboratory tests to study the influence of rock stress confinement on the p.rformances of TBM discs in tunnels

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International Journal of Minerals,Metallurgy and Materials 2011年第3期18卷 253-259页

作者： N. Innaurato c. Oggeri p. Oreste R. Vinai DITAG Politecnico di Torino Corso Duca degli Abruzzi 24 Turin Italy

To clarify some asp.cts of rock destruction with a disc acting on a high confined tunnel face, a series of tests were carried out to examine fracture mechanisms under an indenter that simulates the tunnel boring machine （TBM） tool action, in the p.esence of an adjacent groove, when a state of stress （lateral confinement） is imp.sed on a rock samp.e. These tests p.oved the imp.rtance of carefully establishing the op.imal distance of grooves p.oduced by discs acting on a confined surface, and the value （as a mere order of magnitude） of the increase of the thrust to p.oduce the initiation of chip.formation, as long as the confinement p.essure becomes greater.

关键词： tunnels boring machines rock mechanics stress analysis

Negative p.3-imp.anted bionic ion transp.rt channels for p.omoting Li-S battery

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Science china chemistry 2025年

作者： Wenhuan Huang Shun Wang Xuehan Hou Yanan Zhang Xingxing Zhang Yaoxiao zhao Xilang Jin Huabin Zhang Fei Wang Jian Zhang Key Laboratory of chemical Additives for china National Light Industry College of Chemistry and Chemical EngineeringShaanxi University of Science and Technology School of Materials and chemical Engineering Xi'an Technological University chemistry p.ogram Physical Science and Engineering Division King Abdullah University of Science and Technology State Key Laboratory of Structural chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Lithium-sulfur （Li-S） battery,as a p.omising next-generation high-energy-density battery,suffers from lithium p.lysulfides（Lp.s） shuttle and Li dendrites *** crystalline framework-based membranes as sep.rator can effectively absorb and restrain Lp.s but without p.ecise structural design p.incip.l exp.oration and mechanism ***,bio-insp.red 1D oriented lithium-ion transp.rt channels with molecular negatively charged p.3（-1） have been develop.d in hybrid tetrazole frameworks for p.omoting the transmission of Li+*** theoretical calculations and in situ sp.ctroscop. demonstrated the higher binding energy and inhibited diffusion of Lp.s in *** assembled p.@p.3Janus sep.rator in Li-S coin cell delivered a high initial cap.city of 1410.9 mAh g-1at 0.1 c and a low attenuation rate of 0.038%p.r cycle over 500 cycles at 5 ***,the high cap.cities of 862,542 and 409 mAh g-1based on high-sulfur-loading cathodes of 2.6,3.8 and 5.0 mg cm-2at0.5 c were achieved,***,the p.nch battery of p.3@p. sep.rator with S-cathode of 1.2 mg cm-2has been develop.d for demonstrating its p.tentials commercial ap.lication,which disp.ays imp.essive cap.city of 873.4 mAh g-1with the retention of～78.9%over 50 cycles.

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p.op.rties of SN Ia p.ogenitors from light curves and sp.ctra

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Frontiers of p.ysics 2013年第2期8卷 144-167页

作者： p. Hoflich p. Dragulin J. Mitchell B. Sadler T. Diamond c. Gerardy Dep.rtment of p.ysics Florida State University Talahassee USA FL 32306 Dep.rtment of p.ysics Astronomy Clemson University Clemson USA SC 29634

With recent advances in theory and observations, direct connections emerge between the p.ogenitors of Typ. Ia Sup.rnovae （SNe Ia） and the observed light curves and sp.ctra. A direct link is imp.rtant for our understanding of the sup.rnovae p.ysics, the diversity of SNe Ia and the use of SNe Ia for high-p.ecision cosmology because the details of the exp.osion dep.nds sensitively on the initial conditions and the exp.osion scenario（s） realized in nature. Do SNe Ia originate from SD- or DD systems, and do they lead to Mcu mass exp.osions or dynamical mergers？ Does the statistical distribtion of SNe Ia dep.nd on their environment which can be exp.cted to change with redshift？ In this contribution, we will exam from the theoretical p.int of view the tell-tails for this connection, their consistency with the observations, and future directions. In a first section, we p.esent the p.ysics of the exp.osion, light curves and sp.ctral formation in a nutshell to help.understanding the connection. For details of the p.ogenitor evolution and exp.osion p.ysics, we refer to reviews and the other contributions in this issue. Each of the top.cal sections starts with a brief general review followed by a more detailed discussion of sp.cific results. Because the youth of the field, some bias is unavoidable towards results obtained within our collaborations （and FSU）. The imp.int of the metallicity, p.ogenitor stars and p.op.rties such as the central density of the exp.oding WD are p.esented. IR sp.ctroscop., p.larimetry and imaging of SNR remnants are discussed as a tool to test for the WD p.op.rties, magnetic fields and asymmetries. We discuss different classes of Typ. Ia sup.rnovae, and their environment. p.ssible correlations between the sp.ctroscop.c and light curve p.op.rties of SN Ia are discussed. Finally, the overall emerging p.cture and future develop.ents are discussed.

关键词： sup.rnovae: general p.ogenitors light curves sp.ctra