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The possible electromagnetic counterparts of the first high-probability NSBH merger LIGO/Virgo S190814bv

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Communications in Theoretical Physics 2020年第6期72卷 89-96页

作者： hao wei Minzi Feng School of Physics Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

LIGO/Virgo S190814 bv is the first high-probability neutron star–black hole(NSBH)merger candidate,whose gravitational waves(GWs)triggered LIGO/Virgo detectors at21:10:39.012957 UT,14 August *** has a probability>99%of being an NSBH merger,with a low false alarm rate(FAR)of one per 1.559 e+25 *** an NSBH merger,electromagnetic counterparts(especially short gamma-ray bursts(GRBs))are generally ***,no electromagnetic counterpart has been found in the extensive follow-up observing *** the present work,we propose a novel explanation for this null *** our scenario,LIGO/Virgo S190814 bv is just a GW mirror image of the real NSBH merger which should have been detected before 14 September 2015,but at that time we had no ability to detect its GW *** electromagnetic counterparts associated with the real NSBH merger should be found in the archive data before 14 September *** this work,we indeed find nine short GRBs that are possibly electromagnetic counterparts.

关键词： gravitational wave electromagnetic counterpart gamma-ray burst neutron star black hole mirror image

Non-parametric reconstruction of growth index via Gaussian processes

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Science China(Physics,Mechanics & Astronomy) 2019年第9期62卷 110-119页

作者： Zhao-Yu Yin hao wei School of Physics Beijing Institute of Technology

The accelerated cosmic expansion could be due to dark energy within general relativity(GR), or modified gravity. Differentiating between them using both the expansion history and growth history has attracted considerable attention. In the literature, the growth index γ has been found useful to distinguish these two scenarios. This work aims to consider the non-parametric reconstruction of the growth index γ as a function of redshift z from the latest observational data as of July 2018 via Gaussian processes. We found that f(R) theories and dark energy models within GR(especially ΛCDM) are inconsistent with the results in the moderate redshift range far beyond 3σ confidence level. A modified gravity scenario different from f(R) theories is favored. However, these results can also be due to other non-trivial possibilities in which dark energy models within GR(especially ΛCDM) and f(R) theories may still survive. In all cases, our results suggest that new physics is required.

关键词： cosmology dark energy modified gravity growth index Gaussian processes

Thick and hard anodized aluminum film with large pores for surface composites

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中国有色金属学会会刊：英文版 2004年第z1期14卷 166-169页

作者： WANG Hui WANG hao-wei State Key Laboratory of Metal Matrix Composites Shanghai Jiaotong UniversityShanghai 200030 China State Key Laboratory of Metal Matrix Composites Shanghai Jiaotong UniversityShanghai 200030 China

Al-base surface self-lubricating composites need thick and hard alumina membranes with large pores to add lubricants easily. This kind of porous alumina layer was fabricated in additive-containing, phosphoric acid-based solution. The effects of additive containing organic carboxylic acid and Ce salt on the properties of the oxide film and mechanism were investigated in detail with SEM and EDAX analyses. The results show that the pore diameter is about 100 nm, the film thickness increases by 4 -5 times, and the Vickers hardness improves by about 50% through adding some amount of organic carboxylic acid and Ce salt. Such an improvement in properties is explained in terms of a lower film dissolving velocity and better film quality in compound solution.

关键词： anodization organic carboxylic acid Ce salt thickness hardness large pores

Multi-channel blind deconvolution algorithm for multiple-input multiple-output DS/CDMA system

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Journal of Systems Engineering and Electronics 2007年第3期18卷 454-461页

作者： Cheng hao Guo wei Jiang Yi National Key Lab of Communication Univ. of Electronic Science and Technology Chengdu 610054 P. R. China

Direct sequence spread spectrum transmission can be realized at low SNR, and has low probabilityof detection. It is aly problem how to obtain the original users＇ signal in a non-cooperative context. In practicality, the DS/CDMA sources received are linear convolute mixing. A more complex multichannel blind deconvolution MBD algorithm is required to achieve better source separation. An improved MBD algorithm for separating linear convolved mixtures of signals in CDMA system is proposed. This algorithm is based on minimizing the average squared cross-output-channel-correlation. The mixture coefficients are totally unknown, while some knowledge about temporal model exists. Results show that the proposed algorithm can bring about the exactness and low computational complexity.

关键词： DS/CDMA signal non-cooperative MBD stochastic gradient algorithms for MBD.

Solutions for hydrodynamics of 5-and 10-fold symmetry quasicrystals

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Applied Mathematics and Mechanics(English Edition) 2016年第10期37卷 1393-1404页

作者： Hui CHENG Tianyou FAN hao wei School of Physics Beijing Institute of TechnologyBeijing 100081China School of Science Hebei Engineering UniversityHandan 056038Hebei ProvinceChina

This study carries out a complete analysis of time-space solution of hy- drodynamics of pentagonal/decagonal quasicrystals. The behaviors of wave propagation for phonons and diffusion for phasons and coupling between phonon-phason fields are explored explicitly. Comprehensive discussion on physical time-space variations of all hydrodynamic field variables of the alloy quasicrystals is given. The computational spec- imen is simple, convenient in testing computational results, and provides a possibility that is easy to test experimentally. The quantitative results of mass density, viscosity ve- locities, phonon displacements, phason displacements, phonon stresses, phason stresses, viscosity stresses, and their time-space variations help us understand the motion of solid quasicrystals in a hydrodynamic condition （long-wavelength and low-frequency）. The analysis presented in this paper can be used for octagonal and dodecagonal quasicrys- tals and is easily extended to other two-dimensional quasicrystals and three-dimensional icosahedral quasicrystals. Some problems explored by the computational results are also discussed.

关键词： quasicrystal hydrodynamics mathematical solution finite difference method

KIFC3 promotes proliferation, migration and invasion of esophageal squamous cell carcinoma cells by activating EMT and β-catenin signaling

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World Journal of Gastrointestinal Oncology 2022年第7期14卷 1239-1251页

作者： wei-wei hao Feng Xu Department of Gastroenterology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina

BACKGROUND Esophageal squamous cell carcinoma(ESCC)is one of the most common malignancies.A total of 45 kinesin superfamily proteins(KIFs)have been identified in humans,among which several family members have demonstrated varied functions in tumor pathobiology via different mechanisms,including regulation of cell cycle progression and ***3 has microtubule motor activity and is involved in cancer cell invasion and migration,as well as ***,the role of KIFC3 in ESCC is still *** To evaluate the role of KIFC3 in ESCC and the underlying *** Expression of KIFC3 was evaluated in ESCC tissues and adjacent normal esophageal *** prognostic value of KIFC3 was analyzed using Kaplan-Meier *** formation,EdU assays,cell cycle analysis,Transwell assay,immunofluorescence,and western blotting were performed in ESCC cell lines after transfection with pLVX-Puro-KIFC3-shRNA-and pLVX-Puro-KIFC3-expressing lentiviruses.A xenograft tumor model in nude mice was used to evaluate the role of KIFC3 in *** ofβ-catenin,XAV-939,was used to clarify the mechanism of KIFC3 in *** analyze the differences between groups,t test and nonparametric tests were used.P<0.05 was considered statistically *** Immunohistochemical staining indicated that KIFC3 was upregulated in ESCC tissues compared with adjacent normal ***-Meier Plotter revealed that overexpressed KIFC3 was associated with poor prognosis in ESCC *** formation and EdU assay showed that KIFC3 overexpression promoted cell proliferation,while KIFC3 knockdown inhibited cell proliferation in ESCC cell *** addition,cell cycle analysis showed that KIFC3 overexpression promoted cell cycle ***3 knockdown suppressed ESCC tumorigenesis in *** assay and western blotting revealed that KIFC3 overexpression promoted cell migration and invasion,as well as epithelial-mesenchymal transition(EMT),while KIFC3

关键词： Esophageal squamous cell carcinoma KIFC3 β-catenin Cell proliferation Cell migration Cell invasion

Rapid changes in the near-bottom temperature of the bottom aquaculture area around the Zhangzi Island in summer

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Acta Oceanologica Sinica 2020年第5期39卷 46-54页

作者： Xueliang Nan hao wei Renfu Fan wei Yang School of Marine Science and Technology Tianjin UniversityTianjin 300072China

Rapid changes in the near-bottom water temperature are important environmental factors that can significantly affect the growth and development of species in the bottom *** object of this research is to investigate the mechanism causing these rapid changes within a bottom culture area near the Zhangzi *** hydrographic transects observations in the North Yellow Sea(NYS)suggest that our mooring station is very close to the tidal mixing *** horizontal advection of the tidal front has induced the observed tidal change of bottom temperature at the mooring *** of the mooring near-bottom temperature and current measurements show that the angle between the tidal current horizontal advection and the swing of the tidal front is crucial in determining the variation trend of *** the angle equals 90°,the horizontal tidal current advects along the isotherms so the temperature remains the *** the angle is between 0°and 90°,the seawater moves from deep water to the warmer coastal zone and the temperature *** contrast,the horizontal tidal advection moves the coastal warm water to the mooring station and the water temperature increases when the angle is between 90°and 180°.The amplitude of the temperature change is proportional to the magnitude of the horizontal temperature gradient and the tidal excursion in the direction of the temperature *** study may facilitate the choice of culture area in order to have a good aquaculture production.

关键词： near-bottom temperature horizontal advection tidal mixing front bottom culture area Zhangzi Island

Toward understanding genetic mechanisms of complex traits in rice

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Journal of Genetics and Genomics 2010年第10期37卷 653-666页

作者： wei hao Hong-Xuan Li National Key Laboratory of Plant Molecular Genetics Shanghai Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 China

Rice is the primary carbohydrate staple cereal feeding the world population. Many genes, known as quantitative trait loci （QTLs）, con- trol most of the agronomically important traits in rice. The identification of QTLs controlling agricultural traits is vital to increase yield and meet the needs of the increasing human population, but the progress met with challenges due to complex QTL inheritance. To date, many QTLs have been detected in rice, including those responsible for yield and grain quality; salt, drought and submergence tolerance; disease and insect resistance; and nutrient utilization efficiency. Map-based cloning techniques have enabled scientists to successfully fine map and clone approximately seventeen QTLs for several traits. Additional in-depth functional analyses and characterizations of these genes will provide valuable assistance in rice molecular breeding.

关键词： rice quantitative trait loci (QTLs) mapping populations marker-assisted selection (MAS) map-based cloning

Smooth interpolation on homogeneous matrix groups for computer animation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第7期7卷 1168-1177页

作者： LI Jun hao Peng-wei Center for Information Science Peking University Beijing 100081 China Department of Computer Science Queen Mary University of London London E1 4NS UK

Homogeneous matrices are widely used to represent geometric transformations in computer graphics, with interpo- lation between those matrices being of high interest for computer animation. Many approaches have been proposed to address this problem, including computing matrix curves from curves in Euclidean space by registration, representing one-parameter curves on manifold by rational representations, changing subdivisional methods generating curves in Euclidean space to corresponding methods working for matrix curve generation, and variational methods. In this paper, we propose a scheme to generate rational one-parameter matrix curves based on exponential map for interpolation, and demonstrate how to obtain higher smoothness from existing curves. We also give an iterative technique for rapid computing of these curves. We take the computation as solving an ordinary differential equation on manifold numerically by a generalized Euler method. Furthermore, we give this algorithm’s bound of the error and prove that the bound is proportional to the shift length when the shift length is sufficiently small. Compared to direct computation of the matrix functions, our Euler solution is faster.

关键词： Computer animation Spline and piecewise polynomial approximation