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Elastic Properties and Stacking Fault energies of Borides, Carbides and Nitrides from First-Principles Calculations

Acta Metallurgica Sinica(English Letters) 2019年第9期32卷 1099-1110页

作者： Yong Zhang Zi-Ran Liu Ding-Wang Yuan Qin Shao Jiang-Hua Chen Cui-Lan Wu Zao-Li Zhang Center for High-Resolution Electron Microscopy College of Materials Science and EngineeringHunan UniversityChangsha 410082China Department of Physics Key Laboratory for Low-Dimensional Structures and Quantum Manipulation(Ministry of Education)Hunan Normal UniversityChangsha 410086China Erich Schmid Institute of Materials Science Austrian Academy of SciencesJahnstraBe 128700 LeobenAustria

Owing to the excellent elastic properties and chemical stability,binary metal or light element borides,carbides and nitrides have been extensively applied as hard and low-compressible *** are searching for harder materials all the ***,the successful fabrication of nano-twinned cubic BN(Tian et *** 493:385–388,2013)and diamond(Huang et *** 510:250–253,2014)exhibiting superior properties than their twin-free counterparts allows an efficient way to be *** this point of view,the borides,carbides and nitrides may be stronger by introducing twins,whose formation tendency can be measured using stacking fault energies(SFEs).The lower the SFEs,the easier the formation of *** the present study,by means of first-principles calculations,we first calculated the fundamental elastic constants of forty-two borides,seventeen carbides and thirty-one nitrides,and their moduli,elastic anisotropy factors and bonding characters were accordingly ***,the SFEs of the{111}glide system of twenty-seven compounds with the space group F43 m or Fm3m were *** on the obtained elastic properties and SFEs,we find that(1)light element compounds usually exhibit superior elastic properties over the metal borides,carbides or nitrides;(2)the 5 d transitionmetal compounds(ReB2,WB,OsC,RuC,WC,OsN2,TaN and WN)possess comparable bulk modulus(B)with that of cBN(B=363 GPa);(3)twins may form in ZrB,HfN,PtN,VN and ZrN,since their SFEs are lower or slightly higher than that of diamond(SFE=277 mJ/m^2).Our work can be used as a valuable database to compare these compounds.

关键词： Inorganic compounds Elastic properties Stacking fault energies First-principles calculations

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Rapidity Losses in Heavy-Ion Collisions from AGS to RHIC energies

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Chinese Physics Letters 2010年第5期27卷 65-68页

作者：周凤雏殷中宝周代翠 Institute of Particle Physics Huazhong Normal University Wuhan 430079 Key Laboratory of Quark & Lepton Physics (Ministy of Education) Huzhong Normal University Wuhan 430079

We study the rapidity losses in central heavy-ion collisions from ACS to RHIC encrgolcs with the mean rapidity determined from the projectile net-baryon distribution after collisions. The projectile net-baryon distribution in the full rapidity range is obtained by phenomenologically removing the target contribution at the forward rapidity region from the experimental net-baryon measurements and taking into account the projectile contribution in the backward rapidity region. Based on the full projectile net-baryon distributions, calculations show that the rapidity loss stops increasing from the SPS top energy to RHIC energies, indicating that baryon transport does not depend strongly on energy at high energies.

关键词： rapidity loss RHIC energies energies

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Improved eikonal approach for charge exchange reactions at intermediate energies

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Chinese Physics C 2019年第12期43卷 83-89页

作者： Jing-Jing Li Dan-Yang Pang Yan-Lin Ye Jian-Ling Lou Xiao-Fei Yang Yang Liu Biao Yang School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China School of Physics and Nuclear Energy Engineering Beihang UniversityBeijing 100191China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China

In order to describe charge exchange reactions at intermediate energies,we implemented as a first step the formulation of the normal eikonal *** calculated differential cross-sections based on this approach deviated significantly from the conventional DWBA calculations for CE reactions at 140 MeV/***,improvements were made in the application of the eikonal approximation so as to keep a strict three-dimensional form *** results obtained with the improved eikonal approach are in good agreement with the DWBA calculations and with the experimental *** the improved eikonal approach can be formulated in a microscopic way,it is easy to apply to CE reactions at higher energies,where the phenomenological DWBA is a priori difficult to use due to the lack,in most cases,of the required phenomenological potentials.

关键词： eikonal approximation Improved Eikonal Approach intermediate energies charge exchange reactions DWBA

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Physical energies to the rescue of damaged tissues

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World Journal of Stem Cells 2019年第6期11卷 297-321页

作者： Federica Facchin Silvia Canaider Riccardo Tassinari Chiara Zannini Eva Bianconi Valentina Taglioli Elena Olivi Claudia Cavallini Marco Tausel Carlo Ventura Department of Experimental Diagnostic and Specialty Medicine (DIMES)School of MedicineUniversity of BolognaBologna 40100Italy National Laboratory of Molecular Biology and Stem Cell Engineering National Institute of Biostructures and BiosystemsCNRBologna 40100Italy iB3 SA Lugano 6900Switzerland

Rhythmic oscillatory patterns sustain cellular dynamics, driving the concerted action of regulatory molecules, microtubules, and molecular motors. We describe cellular microtubules as oscillators capable of synchronization and swarming, generating mechanical and electric patterns that impact biomolecular recognition. We consider the biological relevance of seeing the inside of cells populated by a network of molecules that behave as bioelectronic circuits and chromophores. We discuss the novel perspectives disclosed by mechanobiology, bioelectromagnetism, and photobiomodulation, both in term of fundamental basic science and in light of the biomedical implication of using physical energies to govern (stem) cell fate. We focus on the feasibility of exploiting atomic force microscopy and hyperspectral imaging to detect signatures of nanomotions and electromagnetic radiation (light), respectively, generated by the stem cells across the specification of their multilineage repertoire. The chance is reported of using these signatures and the diffusive features of physical waves to direct specifically the differentiation program of stem cells in situ, where they already are resident in all the tissues of the human body. We discuss how this strategy may pave the way to a regenerative and precision medicine without the needs for (stem) cell or tissue transplantation. We describe a novel paradigm based upon boosting our inherent ability for self-healing.

关键词： Stem cells Physical energies Mechanical forces Electric fields Electromagnetic fields Electromagnetic radiation Photobiomodulation Damaged tissues

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MODELS FOR π-π INTERACRIONS IN “MOLECULAR METALS” IONIZATION energies, ELECTRONIC STRUCTURE AND THROVGH-SPACE/THROUGH-BOND INTERACTIONS IN [2,2] PARACYCLOPHANE

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Chinese Chemical Letters 1994年第3期5卷 221-224页

作者： Han Xing LIU (Anvanced Materials Research Institute, Wuhan University of Technology, Wuban, 430070)Chia Chung SUN(Institute of Theoretical Chemistry, Jilin University, Cbangchun, 130021)

The through-space and through-bond interactions of molecular orbitals in [2,2] paracyclophane are studied by the approved MS-X. method with overlapping atomic-sphere. The calculation results show the through-space interactions are exponential flareout with increasing of the distance of two orbitals, *** through-space interactions and through-bond interactions are sizable but those two interactions oppose each other causing the net splitting to be small. Transition-state procedure was used to calculate ionization potentials, the results are in agreement with the PE-spectra.

关键词： SPACE INTERACTIONS ELECTRONIC energies FOR AND INTERACroNS IONIZATION MODELS PARACYCLOPHANE

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Calculation of the Zeeman-Fine energies and the Spectrum with Doppler-Shift Correction of Atomic Lithium

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Journal of Modern Physics 2011年第7期2卷 752-758页

作者： Laila Babsail Leda Bousiakou Salwa Alsaleh Mesude Saglam 不详

We have calculated the Zeeman-fine energies of atomic Lithium (Li) by using the varying effective Landé g-factor method. We take the principle quantum number in the range;(2 ≤n ≤10 ). For this range we find 26 different energy values and 325 wavelengths some of which are the same. The Doppler shift is found to be Δλ=±0.004λ. The Doppler shift-corrected wavelengths are in perfect agreement with the observed (NIST) values for atomic Li.

关键词： Hydrogen-Like Atoms Effective Landé G-Factor Quantum Entanglement Zeeman-Fine energies Photonic Transitions Quantum Flux Of Photon

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Application of Renewable energies in the Construction of New Rural Residences

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Journal of Landscape Research 2012年第1期4卷 42-43,48页

作者：唐泉宣蔚合肥工业大学建筑设计研究院安徽合肥230009 合肥工业大学建筑与艺术学院安徽合肥230009

Based on the significance of renewable resources in relieving energy crisis,application of renewable resources for reducing energy consumption of rural housings and carbon emission of traditional energies are believed as an inevitable choice for the construction of a conservation-minded *** easily-acquired and low-cost solar energy,biomass energy and rainwater for example,strategies of applying renewable resources in rural housings are *** the research focuses on the application of solar energy PV Power System and solar energy photo-thermal power system in rural residence,significance of power system such as methane and waste reusing for the integrated utilization of biomass energy and residence,and also recycling and cooling effects of intermediate water.

关键词： Renewable energies New rural housings Energy saving Technology

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Analysis of Activation energies &Experimental Evidence for Energetic Phase Separation in Ge<sub>x</sub>Se<sub>1-x</sub>Glassy System

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New Journal of Glass and Ceramics 2014年第2期4卷 38-41页

作者： Deepak Sharma Anand Mohan Awasthi Applied Science Department SCRIET CCS University Meerut India UGC-DAE Consortium for Scientific Research Indore India

Glass science reveals peculiar properties due to the lack of long range order and presence of heterogeneity in Chalcogenide glasses. In thermal studies, structural relaxation at the glass transition region is governed by the activation energy of the cooperative unit (zU). In the cooperative molecular dynamics, we are considering the analysis of three activation energies, namely activation energy per BMS (U), activation energy of the cooperative unit (zU) and the apparent activation energy (z2U). From the energetic dynamics of activation energy analysis across the GexSe1-x glass series, data represent three-phase segregation. From our data, we also observed that the value of UCRR/RTg across the GexSe1-x glass series is nominally changed from 34.343 to 36.19.

关键词： Activation energies Chalcogenide Glasses Glass Transition Heterogeneity Molecular Dynamics Structural Relaxation

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2-2 Complete and Incomplete Fusion of 9Be + 169Tm, 187Re at Near-barrier energies

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IMP & HIRFL Annual Report 2014年第1期 31-32页

作者： Fang Yongde Zhang Ningtao Li Guangshun Liu Minliang Wang Jianguo Guo Song Qiang Yunhua Zhou Xiaohong Zhang Yuhu Lei Xiangguo Zheng Yong Gao Bingshui He Xiaofeng Wang Kailong Ding Bing 不详

Fusion cross sections with weakly bound nuclei have been a subject of great interest in the last few years[1;2]. Inthis field, the basic question is whether complete fusion (CF) is enhanced or suppressed due to diffused density andhigh probability of breakup. The answer to this question depends on the energy regime (above or below Coulombbarrier) and on different target mass regions. Therefore, one important approach to investigate this subject is tostudy the systematic behavior of the CF suppression as a function of the target mass or *** fusion induced by 9Be, there are some reported works on the CF on different targets, ranging from 89Y to209Bi[2], but the suppression factor of the CF at near barrier energies does not follow a systematic behavior. Forlighter targets, like 27Al and 64Zn [3;4] and for 238U[5], only total fusion (TF) cross sections were measured. Inorder to contribute to the investigation of the fusion of 9Be, we performed experiments to measure complete andincomplete fusion (ICF) of 9Be on the 187Re and 169Tm targets at energies close to the Coulomb barrier.

关键词： Near-barrier energies Incomplete

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1-3 In-medium and Isospin Effects on Pion Production in Heavy-ion Collisions Near Threshold energies

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IMP & HIRFL Annual Report 2015年第1期 5-7页

作者： Feng Zhaoqing 不详

Properties of hadrons in nuclear medium is interest in studying the Quantum Chromodynamics (QCD) structure in dense matter, in particular related to the chiral symmetry restoration, phase-transition from quark-gluon plasma to hadrons, dynamics of hypernucleus formation, nuclear equation of state (EoS), etc. High energy heavy-ion collisions in terrestrial laboratory provide a unique possibility to study the in-medium properties of hadrons in dense nuclear matter and to extract the high-density behavior of the nuclear symmetry energy (isospin asymmetri part of EoS). The dynamics of pseudoscalar mesons in heavy-ion collisions and the in-medium properties in dense nuclear matter have been investigated with the Lanzhou quantum molecular dynamics (LQMD) transport model[1].

关键词： Isospin Production Threshold energies

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