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Dirac Clouds around Dilatonic Black Holes

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Research 2022年第2期2022卷 371-378页

作者： yang huang Hongsheng Zhang School of Physics and Technology University of linan336West Road of Nan XinzhuangJinan250022 ShandongChina

Dirac dloud is in absence in general relativity since the superradiance mechanism fails to work for Dirac *** the first time,we find a novel mechanism to support Dirac clouds,which is independent on superradiance *** study quasibound states of Dirac particles around a charged spherial black hole in dilatonic *** find that the quasibound states become real bound states when the central black hole becomes *** make an intensive study of the energy spectrum of the stationary clouds for different fine structure constant pμM and reveal the existence condition of these *** result strongly implies that extreme dilatonic black holes behave as elementary particles.

关键词： mechanism. Dirac black

Geochemical Characteristics of Zoned Chromites in Peridotites from the Proterozoic Miaowan Ophiolitic Complex, yangtze Craton: Implications for Element Mobility and Tectonic Setting

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Journal of Earth Science 2020年第2期31卷 223-236页

作者： yang huang Hao Deng State Key Laboratory of Geological Processes and Mineral Resources Center for Global TectonicsSchool of Earth SciencesChina University of GeosciencesWuhan 430074China

The chrome spinel(chromite)in mantle peridotites from ophiolites can shed light on the formation and evolution process of *** chromites were found in the Late Proterozoic Miaowan ophiolitic complex(MOC),yangtze *** to the metamorphism and intense deformation,most chromite grains in the MOC peridotites show typical chemical zoning(core-rim texture).The values of major and trace elements largely vary from core to rim within chromite grains,indicating that the chromites have undergone strong alteration and element *** and trace elements in the core parts of chromites are used to infer the tectonic origins and evolution of mantle peridotites in the *** chromites from the MOC peridotites have higher Cr#values and lower Ni and Ga contents with respect to those from Phanero-zoic mantle peridotites,indicating a higher degree of ***-situ major and trace elements(e.g.,Ga)characteristics of podiform chromites in the MOC show that chromites from both harzburgites and dunites have strong subduction-related signatures,indicating that the MOC has formed in a supra-subduction setting which is consistent with the geological and geochemical data presented in previous studies.

关键词： podiform chromite Miaowan ophiolitic complex trace elements Precambrian yangtze Craton

Tailoring edge and interface states in topological metastructures exhibiting the acoustic valley Hall effect

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Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 82-92页

作者： Jiao Wang yang huang WeiQiu Chen Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Department of Engineering MechanicsZhejiang UniversityHangzhou 310027China State Key Lab of CAD&CG Zhejiang UniversityHangzhou 310058China Soft Matter Research Center Zhejiang UniversityHangzhou 310027China

In this study, we investigate the acoustic topological insulator or topological metastructure, where an acoustic wave can exist only in an edge or interface state instead of propagating in bulk. Breaking the structural symmetry enables the opening of the Dirac cone in the band structure and the generation of a new band gap, wherein a topological edge or interface state ***, we systematically analyze two types of topological states that stem from the acoustic valley Hall effect mechanism;one type is confined to the boundary, whereas the other type can be observed at the interface between two topologically different structures. Results denote that the selection of different boundaries along with appropriately designed interfaces provides the acoustic waves in the band gap range with abilities of one-way propagation, dual-channel propagation, immunity from backscattering at sharp corners, and/or transition between propagation at interfaces and boundaries. Furthermore, we show that the acoustic wave propagation paths can be tailored in diverse and arbitrary ways by combing the two aforementioned types of topological states.

关键词： acoustic crystals valley Hall effect edge states interface states Dirac cone

A Numerical-analytic Method for Quickly Predicting Springback of Numerical Control Bending of Thin-walled Tube

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Journal of Materials Science & Technology 2006年第5期22卷 713-720页

作者： Mei ZHAN He yang Liang huang College of Materials Science and Engineering Northwestern Polytechnical University Xi＇an 710072 China

Springback is one of important factors influencing the forming quality of numerical control （NC） bending of thin-walled tube. In this paper, a numerical-analytic method for springback angle prediction of the process was put forward. The method is based on springback angle model derived using analytic method and simulation results from three-dimensional （3D） rigid-plastic finite element method （FEM）. The method is validated through comparison with experimental results. The features of the method are as follows：（1） The method is high in efficiency because it combines advantages of rigid-plastic FEM and analytic method. （2） The method is satisfactory in accuracy, since the field variables used in the model is resulting from 3D rigid-plastic FEM solution, and the effects both of axial force and strain neutral axis shift have been included. （3） Research on multi-factor effects can be carried out using the method due to its advantage inheriting from rigid-plastic FEM. The method described here is also of general significance to other bending processes.

关键词： Thin-walled tube Numerical control bending Springback Numerical-analytic method 3D rigid-plastic FEM

Response mechanism of Chlamydomonas reinhardtii to nanoscale bismuth oxyiodide(nano-BiOI):Integrating analysis of mineral nutrient metabolism and metabolomics

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Journal of Environmental Sciences 2022年第11期34卷 13-24页

作者： Yan huang Jinlong Lai yang huang Xuegang Luo Xu yang Zewei Liu Yue Duan Chen Li School of Life Sciences Southwest University of Science and TechnologyMianyang 621010China College of Environment and Resources Southwest University of Science and TechnologyMianyang 621010China Laboratory of Solid Waste Treatment and Resource Recycle Ministry of EducationMianyang 621010China College of Chemical and Environment Science Shaanxi University of TechnologyHanzhong 723000China

Nanoscale bismuth oxyiodide(nano-BiOI) is widely studied and applied in environmental applications and biomedical fields, with the consequence that it may be deposited into aquatic environments. However, the impact of nano-Bi OI on aquatic ecosystems, especially freshwater microalga, remains limited. Herein, the nano-Bi OI was synthesized and its response mechanism towards microalga Chlamydomonas reinhardtii was evaluated. Results showed that a low concentration of nano-Bi OI(5 mg/L) could stimulate algal growth at the early stage of stress. With the increase in concentration, the growth rate of algal cells was inhibited and showed a dose effect. Intracellular reactive oxygen species(ROS) were significantly induced and accompanied by enhanced lipid peroxidation, decreased nonspecific esterase activity, and significantly upregulated glutathione S-transferase activity(GST) activity. Mineral nutrient metabolism analysis showed that nano-Bi OI significantly interfered with the mineral nutrients of the algae. Non-targeted metabolomics identified 35 different metabolites(DEMs, 22 upregulated, and 13 downregulated) under 100 mg/L Bi OI *** pathway analysis demonstrated that a high concentration of nano-Bi OI significantly induced metabolic pathways related to amino acid biosynthesis, lipid biosynthesis,and glutathione biosynthesis, and significantly inhibited the sterol biosynthesis *** finding will contribute to understanding the toxicological mechanisms of nano-Bi OI on C. reinhardtii.

关键词： Chlamydomonas reinhardtii Nano-BiOI Mineral nutrient Metabolomics

Joint Subcarrier and Power Allocation for Multi-UAV Systems

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China Communications 2019年第1期16卷 47-56页

作者： Xin Guan yang huang Qingjiang Shi College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space(NUAA) Ministry of Industry and Information Technology School of Software Engineering Tongji University

This paper investigates subcarrier and power allocation in a multi-UAV OFDM *** study considers a practical scenario,where certain subcarriers are unavailable for dynamic subcarrier allocation,on account of pre-allocation for burst *** first propose a novel iterative algorithm to jointly optimize subcarrier and power allocation,so as to maximize the sum rate of the uplink transmission in the multiUAV OFDM *** key idea behind our solution is converting the nontrivial allocation problem into a weighted mean square error(MSE) *** this means,the allocation problem can be solved by the alternating optimization ***,aiming at a lower-complexity solution,we propose a heuristic allocation scheme,where subcarrier allocation and transmit power allocation are separately *** the heuristic scheme,closedform solution can be obtained for power *** results demonstrate that in the presence of stretched subcarrier resource,the proposed iterative joint optimization algorithm can significantly outperform the heuristic scheme,offering a higher sum rate.

关键词： Multi-UAV OFDM subcarrier allocation power allocation alternating optimization weighted MSE

Theoretical studies of C_(36) encapsulated in zigzag single-wall carbon nanotubes

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Chinese Science Bulletin 2006年第1期51卷 25-30页

作者： yang Baohua WANG yang huang Yuanhe Department of Chemistry Beijing Normal University Beijing 100875China

The one-dimensional hybrid structures of C36 encapsulated in zigzag single-wall carbon nanotubes (C36@(n,0)) have been investigated using ab initio self-consistent-field crystal orbital method based on the density functional theory. The research focuses on the change of geometric and band struc- tures for the nanotubes upon C36 encapsulation. The obtained results show that the introduction of C36 can modify the electronic properties of CNT. The diameter of carbon nanotube plays an important role in the geometric and electronic properties of the peapod structures.

关键词：碳纳米管理论研究制备密度功能理论

A near-vision chart for children aged 3-5 years old:new designs and clinical applications

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International Journal of Ophthalmology(English edition) 2014年第3期7卷 457-462页

作者： yang-Qing huang He huang Rong-Zhi huang Biomedical Engineering Institute of Xi'an Jiaotong University Yijishan Hospital of Wannan Medical College Department of Ophthalmology the Second People's Hospital of Anqing

AIM:To introduce a new near-vision chart for children aged 3-5 years old and its clinical ***:Thenewnear-visionchartwhichcombined the Bailey-Lovie layout with a newly devised set of symmetry symbols was designed based on WeberFechner *** consists of 15 rows of symmetry symbols,corresponding to a visual acuity range from 1.3 to *** optotypes were red against a white background and were specially shaped four basic geometric symbols:circle,square,triangle,and cross,which matched the preschool children’s cognitive level.A regular geometric progression of the optotype sizes and distribution was employed to arrange in 15 *** progression rate of the optotype size between two lines was 1.2589 and two smaller groups of optotypes ranging from 0.7 to-0.1 logMAR were included for repetitive testing.A near visual acuity was recorded in logMAR or decimal,and the testing distance was 25 ***:This new near-vision chart with pediatric acuity test optotypes which consists of 4 different symbols(triangle,square,cross,and circle)met the national and international eye chart design *** performing the near visual acuity assessment in preschoolers(3-5y old).It overcame an inability to recognize the letters of the alphabet and difficulties in designating the direction of black abstract symbols such as the tumbling’E’or Landolt’C’,which the subjects were prone to lose interest *** vision may be recorded in different notations:decimal acuity and *** two notations can be easily convertedeach other in the new near-vision *** measurements of this new chart not only showed a significant correlation and a good consistency with the Chinese national standard logarithmic near-vision chart(r=0.932,P<0.01),but also indicated good test-retest reliability(89%of retest scores were within 0.1 logMAR units of the initial test score)and a high response ***:The results of this study support the validity and reliability of

关键词： preschool children Weber-Fechner law Chinese national standard logarithmic near-vision chart

A new specialized visual acuity chart for amblyopic children aged 3-5 years old:development and its clinical applications

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International Journal of Ophthalmology(English edition) 2013年第6期6卷 844-850页

AIM:To Introduce a new specialized visual acuity chart for amblyopic children aged 3-5 years old and its clinical ***:The new visual acuity chart and notations were designed based on Weber-Fechner *** optotypes were red against a white background and were specially shaped four basic geometric symbols:circle,square,triangle,and cross.A regular geometric progression of the optotype sizes and distribution was employed to arrange in 14 *** progression rate of the optotype size between two lines was 1.2589 and the testing distance was *** acuity score could be recorded as logMAR notation or decimal *** diagnostic criteria for amblyopia established by consensus statement on diagnosis of amblyopia(2011)among members of the Strabismus and Pediatric Ophthalmology Group,Ophthalmology Society,Chinese Medical Association(SPOGOSCMA)were illustrated in the new visual acuity ***:When assessing visual acuity in children aged 3-5 years old,this new visual acuity chart that consists of four symmetrical shapes(triangle,square,cross,and circle)overcame an inability to recognize the letters of the alphabet and difficulties in designating the direction of black abstract symbols such as the tumbling’E’or Landolt’C’,which the subjects were prone to lose interest *** visual acuity score may be recorded indifferent notations:decimal acuity and *** two notations can be easily converted each other in the new eye *** measurements of this new chart not only showed a significant correlation and a good consistency with the international standard logarithmic visual acuity chart(r=0.932,P<0.01),but also indicated a high test-retest reliability(89%of retest scores were within 0.1 logMAR units of the initial test score).CONCLUSION:The results of this study support the validity and reliability of distance visual acuity measurements using the new eye chart in children aged3 to 5 years over a wide range of visual acuities,

关键词： amblyopic children Weber-Fechner law international standard logarithmic visual acuity chart