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Convergence of the Interior Penalty Integral Equation Domain Decomposition Method

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Journal of Electronic Science and Technology 2019年第2期17卷 152-160页

作者： bo mi Yu Hu Zhang Liu Ling Qin School of Information Science and Engineering Chongqing Jiaotong University Chongqing 400074 China College of Physics and Engineering Chengdu Normal University Chengdu 611130 China

To solve electrically large scattering problems with limited memory, a Gauss-Seidel iteration scheme is applied to solve the interior penalty integral equation domain decomposition method. Since the original stabilization parameter in this method is frequency-dependent, the convergence of stationary iterations shows obvious dependence on frequency and slow convergence can be observed in some frequency bands. To avoid this dependence and obtain fast convergence in a wide frequency band, a frequency-independent stabilization parameter is introduced. This parameter is chosen proportionally to the average mesh length and inversely proportionally to the wavelength. Numerical examples are proposed to verify the effectiveness of the proposed approach.

关键词： Domain decomposition electromagnetic scattering interior penalty perfect electrically conducting

Quantitative HRTEM and its application in the study of oxide materials

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Chinese Physics B 2018年第5期27卷 22-32页

作者： Chun-Lin Jia[[ Shao-bo mi Lei Jin Ernst Ruska-Centre (ER-C) for microscopy and Spectroscopy with Electrons Forschungszentrum Julich GmbH 52425 Julich Germany School of microelectronics Xi'an Jiaotong University Xi'an 710049 China State Key Laboratory for Mechanical Behaviour of Materials Xi'an Jiaotong University Xi'an 710049 China

On the basis of a state-of-the-art aberration-corrected transmission electron microscope, the spherical aberration coefficient CSof the objective lens can be tuned to either a positive or a negative value. The use of a negative value of CS combined with an overfocus setting of the objective lens leads to the development of the negative CSimaging（NCSI） technique. Images obtained using the NCSI technique show superior contrast and signal intensity at atomic column positions than the corresponding positive CSimages, especially for weakly scattering oxygen columns that are in close proximity to strongly scattering cation columns in oxides. Based on the images obtained under the NCSI condition, quantification of the image contrast allows measurements of the atom positions with a precision of a few picometers and the local chemistry on atomic scale. In the present review, we discuss firstly the benefits of the NCSI technique in studies of oxide materials,and then show a procedure for quantitative analysis of the image based on the absolute value of contrast. In the last part,examples are given for the application of the quantitative high-resolution transmission electron microscopy（HRTEM） to the study of electric dipoles of oxide ferroelectrics and atomic-scale chemistry of interfaces.

关键词： quantitative high-resolution transmission electron microscopy (HRTEM) negative Cs imaging(NCSI) aberration-correction functional oxides

A Novel PoW Scheme Implemented by Probabilistic Signature for Blockchain

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Computer Systems Science & Engineering 2021年第11期39卷 265-274页

作者： bo mi Yuan Weng Darong Huang Yang Liu Yuqing Gan Institute of Information Science and Engineering Chongqing Jiaotong UniversityChongqing400074China Electrical and Electronics Engineering Department The University of SheffieldSheffieldS102TTUnited Kingdom

PoW(Proof of Work)plays a significant role in most blockchain systems to grant an accounting right over decentralized participants and ensure tamper *** hash functions are generally exploited for PoW due to their merits on summering,anti-collision,and irreversibility,they cannot certify that the bookkeeper is exactly the ***,such insistence may lead to abuse or even embezzlement of computing power for the benefit of malicious *** preserve the functionality of PoW but also bind the miners’signing keys with their works,we build a post-quantum PoW scheme by changing the approximate closest vector norm for probabilistic *** from the schemes based on hash functions,our scheme takes signing as the proof of work where signature verification is just the evidence of block *** also presented a method to adjust the difficulty of signing by modifying the probability of generating a correct *** performance of our scheme is also analyzed theoretically and experimentally,which implies its practicability and advantages.

关键词： Proof of work NTRUSign Burr distribution blockchain

Tunable electronic structure and magnetic coupling in strained two-dimensional semiconductor MnPSe3

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Frontiers of physics 2018年第4期13卷 167-174页

作者： Qi Pei Xiao-Cha Wang Ji-Jun ZOU Wen-bo mi Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology School of Science Tianjin University Tianjin 300354 China School of Electrical and Electronic Engineering Tianjin University of Technology Tianjin 300384 China Key Laboratory for Green Chemical Technology of the ministry of Education School of Chemical Engineering and Technology Tianjin University Tianjin 300354 China

The electronic structures and magnetic properties of strained monolayer MnPSe3 are investigated sys- tematically via first-principles calculations. It is found that the magnetic ground state of monolayer MnPSe3 can be significantly affected by biaxial strain engineering, while the semiconducting char- acteristics are well-preserved. Owing to the sensitivity of the magnetic coupling towards structural deformation, a biaxial tensile strain of approximately 13% can lead to an antiferromagnetic （AFM）- ferromagnetic （FM） transition. The strain-dependent magnetic stability is mainly attributed to the competition of the direct AFM interaction and indirect FM superexchange interaction between the two nearest-neighbor Mn atoms. In addition, we find that FM MnPSe3 is an intrinsic half semiconductor with large spin exchange splitting in the conduction bands, which is crucial for the spin-polarized carrier injection and detection. The sensitive interdependence among the external stimuli, electronic structure, and magnetic coupling makes monolayer MnPSe3 a promising candidate for spintronics.

关键词： two-dimensional semiconductor MnPSe3 strain engineering electronic structure magnetic coupling

Genomic organization and transcriptional modulation in response to endocrine disrupting chemicals of three vitellogenin genes in the self-fertilizing fish Kryptolebias marmoratus

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Journal of Environmental Sciences 2016年第4期28卷 187-195页

作者： bo-mi Kim min Chul Lee Hye-min Kang Jae-Sung Rhee Jae-Seong Lee Department of Biological Science College of ScienceSungkyunkwan University Department of Marine Science College of Natural SciencesIncheon National University

Vitellogenin（Vtg）is the precursor of egg yolk proteins,and its expression has been used as a reliable biomarker for estrogenic contamination in the aquatic *** examine the biomarker potential of the self-fertilizing killifish Kryptolebias marmoratus Vtgs（Km-Vtgs）,full genomic DNAs of Km-Vtgs-Aa,Km-Vtgs-Ab,and Km-Vtgs-C were cloned,sequenced,and *** Vtg genes in *** are tandemly placed in a550 kb section of the same *** silico analysis of promoter regions revealed that both the Km-Vtgs-Aa and Km-Vtgs-Ab genes had an estrogen response element（ERE）,but the Km-Vtgs-C gene did ***,all three Km-Vtgs genes had several ERE-half sites in their promoter *** analysis demonstrated that the three deduced amino acid residues were highly conserved with conventional Vtgs protein,forming distinctive clades within teleost *** tissue showed the highest expression of Km-Vtg transcripts in all tested tissues（brain/pituitary,eye,gonad,intestine,skin,and muscle）in response to endocrine disrupting chemical（EDC）-exposed ***-Vtg transcripts were significantly increased in response to 17β-estradiol（E2）,tamoxifen（TMX）,4-n-nonylphenol（NP）,bisphenol A（BPA）,and octylphenol（OP）over 24 hr *** Km-Vtg-A gene was highly expressed compared to the control in response to NP and ***-induced modulatory patterns of Km-Vtg gene expression were different depending on tissue,gender,and isoforms.

关键词： Kryptolebias marmoratus Vitellogenin Endocrine disrupting chemical

Biopsy-proven acute phosphate nephropathy:A case report

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World Journal of Clinical Cases 2020年第12期8卷 2585-2589页

作者： Kristianne Rachel Palanca Medina-Liabres bo mi Kim Sejoong Kim Department of Internal Medicine Seoul National University Bundang HospitalSeongnam-si 13620Gyeonggi-doSouth Korea

BACKGROUND Acute phosphate nephropathy(APN)is a disease that can occur when exposed to high doses of *** most common cause of APN is the use of oral sodium phosphate for bowel cleansing ***,there are other less commonly known sources of phosphate that are equally *** date,our literature search did not identify any report of excessive dietary phosphate as a cause of *** SUMMARY We report an unusual case of a 39-year-old diabetic male who presented with epigastric pain and ***-up showed elevated serum creatinine,potassium,and calcium-phosphate product,and metabolic *** patient was admitted in the intensive care unit and received emergent renal replacement *** biopsy revealed tubular cell injury with transparent crystal casts positive for Von Kossa staining,which established the diagnosis of *** This case confirmed that APN may occur with other sources of phosphorus,highlighting the importance of good history taking and kidney biopsy in patients with predisposing factors for *** awareness on the possibility of APN and its timely recognition and management is imperative so that appropriate measures can be instituted to prevent or delay its progression to end stage renal disease.

关键词： Hyperphosphatemia Nephrocalcinosis Acute phosphate nephropathy Renal insufficiency Chronic kidney disease Biopsy Case report

Sign reversal and manipulation of anomalous Hall resistivity in facing-target sputtered Pt/Mn_(4)N bilayers

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Rare Metals 2023年第2期42卷 591-601页

作者： Ze-Yu Zhang Jia-Wei Jiang Xiao-Hui Shi Xiang Liu Xia Chen Zhi-Peng Hou Wen-bo mi Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology School of ScienceTianjin UniversityTianjin300354China School of Physics and Electronic Engineering Linyi UniversityLinyi276000China College of Science Civil Aviation University of ChinaTianjin300300China Guangdong Provincial Key Laboratory of Optical Information Materials and Technology&Institute for Advanced Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China

The magnetic and electronic transport properties manipulated by spin-orbit torque have been devoted much attention as they show a great promise for future spintronic ***,the spin dependent transport properties of the facing-target sputtered Pt/Mn_(4)N bilayers on MgO(001)substrates have been investigated *** Hall resistivity of Pt/Mn_(4)N bilayers is strongly dependent on temperature,applied current intensity,Mn_(4)N and Pt layer *** temperature-dependent sign reversal of anomalous Hall resistivity appears in Pt/Mn_(4)N bilayers,which is dominated by the competition between the magnetic proximity and spin Hall ***,the magnitude of anomalous Hall resistivity can be manipulated by applied current *** critical and saturation currents are related to Mn_(4)N and Pt layer ***,a Dzyaloshinskii-Moriya interaction coefficient(D)of 5.63 mJ·m^(-2)is calculated in Pt/Mn_(4)N/MgO *** details of the anomalous Hall effects in Pt/Mn_(4)N bilayers are helpful to understand the interfacial effects between heavy metals and ferrimagnets.

关键词： Pt/Mn_(4)N bilayer Hall resistivity Magnetic proximity effect Spin Hall effect(SHE) DzyaloshinskiiMoriya interaction(Dmi)

Protective effects of Ecklonia cava extract on the toxicity and oxidative stress induced by hair dye in in-vitro and in-vivo models

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Journal of Oceanology and Limnology 2019年第3期37卷 909-917页

作者： OH Jae-Young RYU bo-mi YANG Hye-Won KIM Eun-A LEE Jung-Suck JEON You-Jin Department of Marine Life Science Jeju National UniversityJeju 63243Republic of Korea Jeju International Marine Science Center for Research & Education Korea Institute of Ocean Science and TechnologyJeju 63349Republic of Korea Research Center for Industrial Development of Seafood Gyeongsang National UniversityTongyeong 53064Republic of Korea

Oxidative hair dyes containingρ-phenylenediamine(PPD)are reported to induce an allergic reaction by promoting oxidative stress when absorbed through the *** the associated risk,these hair dyes remain popular owing to their convenience and sharpness of *** makes it important to minimize the cytotoxicity and oxidative stress induced by PPD-containing hair *** cava extract has been evaluated in different studies for its protective effects against external stress in fibroblasts and *** study was aimed at using in-vitro and in-vivo models to investigate the extract’s effects on cytotoxicity of and oxidative stress induced by PPD-containing hair *** of CIEL*a*b*Color space was first used to determine the range of *** extract that would not interfere with the coloring ability of the dye upon ***,the set ranges of *** extract(5% and 7%)were added to the hair dye and their toxicity assessed by evaluating the viability of fibroblasts and *** effects on developmental phenotypes and induction of oxidative stress by hair dye were evaluated and compared with those of hair dyes containing different contents of *** extract using an in-vivo zebrafish *** results showed that *** extract in hair dye could significantly decrease the cytotoxicity and levels of oxidative stress caused by hair dyes containing PPD in both in-vitro and in-vivo *** results suggest that the addition of 7% *** extract to 250μg/mL hair dye does not interfere with the coloring ability of the dye while showing significant protective eff ects against the hair *** study proposes that the use of *** extract as an adduct to hair dyes containing PPD reduces the cytotoxicity and oxidative stress induced by these hair dyes.

关键词： hair dye Ecklonia cava cytotoxicity oxidative stress in-vitro and in-vivo models

Arbitrary topological charge vortex beams from carbon dots random lasers

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Rare Metals 2024年第8期43卷 3844-3853页

作者： Xiang-Dong Wang Xiao-bo mi Jiu-Ru He Feng-Ying Ma Jun-Qiao Wang Li Song Yong-Qiang Zhang Si-Yu Lu Yong-Sheng Hu School of Physics and microelectronics Zhengzhou UniversityZhengzhou 450001China State Key Laboratory of Reliability and Intelligence of Electrical Equipment and Tianjin Key Laboratory of Electronic Materials and Devices School of Electronics and Information EngineeringHebei University of TechnologyTianjin 300401China Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhou450001China

Vortex beams have attracted great attention due to their promising applications in the fields of high-capacity optical communication,optical micromanipulation,and quantum information ***,we demonstrate vortex beams with flexible control of the topological charge and modes in a carbon dots random laser for the first *** beams with different types,including the Laguerre-Gaussian(LG),Bessel-Gaussian(BG),LG-superposition,and polarized vortex beams with topological charges up to 50,have been successfully ***,vortex beams can be well realized in carbon dots random lasers with different emission wavelengths covering from 465 to 612 *** work would not only enrich the types of vortex laser,especially for solution-processable lasers,but also provide a new route to realizing multicolor and wavelength-tunable vortex lasers.

关键词： Carbon dots Random lasers Vortex beam Topological charge Spatial light modulator