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Reconfigurable Transmitter Coil Structure for Highly Efficient and Misalignment-insensitive Wireless Power Transfer Systems in Megahertz Range

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Chinese Journal of Electrical engineering 2019年第2期5卷 56-62页

作者： Lihao wu bo Zhang School of Electric Power South China University of TechnologyGuangzhou 510641China

The structural optimization of coils is a key issue in wireless power transfer(WPT)applications owing to size *** this study,a novel planar-spiral transmitter coil(TX-coil)with an outer-tight and inner-sparse configuration is proposed to achieve a high quality factor(Q-factor)and uniform magnetic field,which ensures high efficiency and improves the misalignment tolerance for several-megahertz WPT ***,a closed-form expression for the Q-factor is provided and analyzed for coil *** using this method,a TX-coil with an outer diameter of 100 mm and a wire diameter of 1.5 mm is designed and tested at 1 *** element method simulations and experimental results demonstrate that the Q-factor is increased by about 8%in comparison with evenly spaced planar spiral coils,which is achieved while ensuring a relatively uniform magnetic field.

关键词： High quality factor planar spiral coil structure optimization uniform magnetic field wireless power transfer

Pointwise characterizations of curvature and second fundamental form on Riemannian manifolds

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Science China Mathematics 2018年第8期61卷 1407-1420页

作者： Fengyu Wang bo wu Center for Applied Mathematics Tianjin University Department of Mathematics Swansea University School of Mathematical Sciences Fudan University

Let M be a complete Riemannian manifold possibly with a boundary?*** any C^1-vector field Z,by using gradient/functional inequalities of the(reflecting)diffusion process generated by L:=?+Z,pointwise characterizations are presented for the Bakry-Emery curvature of L and the second fundamental form of?M if it *** characterizations extend and strengthen the recent results derived by Naber for the uniform norm‖RicZ‖∞on manifolds without boundaries.A key point of the present study is to apply the asymptotic formulas for these two tensors found by the first author,such that the proofs are significantly simplified.

关键词： curvature second fundamental form diffusion process path space

SIMULATIONS OF MECHANICAL BEHAVIOR OF POLYCRYSTALLINE COPPER WITH NANO-TWINS

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Acta Mechanica Solida Sinica 2008年第3期21卷 189-197页

作者： bo wu Yueguang Wei State-Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China

Mechanical behavior and microstructure evolution of polycrystalline copper with nano-twins were investigated in the present work by finite element simulations. The fracture of grain boundaries are described by a cohesive interface constitutive model based on the strain gradient plasticity theory. A systematic study of the strength and ductility for different grain sizes and twin lamellae distributions is performed. The results show that the material strength and ductility strongly depend on the grain size and the distribution of twin lamellae microstructures in the polycrystalline copper.

关键词： nanocrystalline twinned copper mechanical behavior cohesive model finite element simulation

A Note on the Perturbed Compound Poisson Risk Model with a Threshold Dividend Strategy

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Acta Mathematicae Applicatae Sinica 2009年第2期25卷 205-216页

作者： bo Li Rong wu School of Mathematical Sciences and LPMC Nankai University Tianjin 300071 China

In this paper, we consider the Perturbed Compound Poisson Risk Model with a threshold dividend strategy （PCT）. Integro-differential equations （IDE） for its Cerber-Shiu functions and dividend payments function are ... 详细信息

关键词： Gerber-Shiu function threshold dividend strategy expected discounted payments function integro-differential equation

Selection diagram of design algorithms for neutron-focusing supermirrors

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Nuclear Science and Techniques 2022年第8期33卷 106-117页

作者： Wen-bo Mo Hua-Rui wu Xue-wu Wang Department of engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle Radiation Imaging(Tsinghua University) Ministry of EducationBeijing 100084China

The neutron supermirror is an important neutron optical device that can significantly improve the efficiency of neutron transport in neutron guides and has been widely used in research neutron *** types of algorithms,including approximately ten algorithms,have been developed for designing high-efficiency supermirror *** addition to its applications in neutron guides,in recent years,the use of neutron supermirrors in neutronfocusing mirrors has been proposed to advance the development of neutron scattering and neutron imaging instruments,especially those at compact neutron *** this new application scenario,the performance of supermirrors strongly affects the instrument performance;therefore,a careful evaluation of the design algorithms is *** this study,we examine two issues:the effect of nonuniform film thickness distribution on a curved substrate and the effect of the specific neutron intensity distribution on the performance of neutron supermirrors designed using existing *** effect of film thickness nonuniformity is found to be relatively insignificant,whereas the effect of the neutron intensity distribution over Q(where Q is the magnitude of the scattering vector of incident neutrons)is *** diagrams that show the best design algorithm under different conditions are obtained from these *** the intensity distribution is not considered,empirical algorithms can obtain the highest average reflectivity,whereas discrete algorithms perform best when the intensity distribution is taken into *** reasons for the differences in performance between algorithms are also *** findings provide a reference for selecting design algorithms for supermirrors for use in neutron optical devices with unique geometries and can be very helpful for improving the performance of focusing supermirror-based instruments.

关键词： Neutron-focusing supermirror Design algorithm Thickness nonuniformity Intensity distribution over Q Selection diagram

Hearing impairment-associated KARS mutations lead to defects in aminoacylation of both cytoplasmic and mitochondrial tRNA^(Lys)

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Science China(Life Sciences) 2020年第8期63卷 1227-1239页

作者： Yong Wang Jing-bo Zhou Qi-Yu Zeng Siqi wu Mei-Qin Xue Pengfei Fang en-Duo Wang Xiao-Long Zhou State Key Laboratory of Molecular Biology CAS Center for Excellence in Molecular Cell ScienceShanghai Institute of Biochemistry and Cell BiologyChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai 200031China School of Life Science and Technology ShanghaiTech UniversityShanghai 201210China State Key Laboratory of Bioorganic and Natural Products Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Aminoacyl-tRNA synthetases(aaRSs)are ubiquitously expressed,essential enzymes,synthesizing aminoacyl-tRNAs for protein *** defects of aaRSs frequently cause various human *** KARS encodes both cytosolic and mitochondrial lysyl-tRNA synthetases(LysRSs).Previously,two mutations(c.1129 G>A and c.517 T>C)were identified that led to hearing impairment;however,the underlying biochemical mechanism is *** the present study,we found that the two mutations have no impact on the incorporation of LysRS into the multiple-synthetase complex in the cytosol,but affect the cytosolic LysRS level,its tertiary structure,and cytosolic tRNA aminoacylation in *** for mitochondrial translation,the two mutations have little effect on the steady-state level,mitochondrial targeting,and tRNA binding affinity of mitochondrial ***,they exhibit striking differences in charging mitochondrial tRNALys,with the c.517T>C mutant being completely deficient in vitro and in *** constructed two yeast genetic models,which are powerful tools to test the in vivo aminoacylation activity of KARS mutations at both the cytosolic and mitochondrial ***,our data provided biochemical insights into the potentially molecular pathological mechanism of KARS c.1129G>A and c.517T>C mutations and provided yeast genetic bases to investigate other KARS mutations in the future.

关键词： aminoacyl-tRNA synthetase tRNA aminoacylation protein synthesis

The microRNA miR-184 regulates the CYP303A1 transcript level to control molting of Locusta migratoria

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Insect Science 2021年第4期28卷 941-951页

作者： Yan-Li Wang Li-Xian wu Hui-Yong Li Xue-Qin Wen en-bo Ma Kun-Yan Zhu Jian-Zhen Zhang Research Institute of Applied Biology Shanxi UniversityTaiyuanShanxiChina College of Life Science Shanxi UniversityTaiyuanShanxiChina Department of entomology Kansas State UniversityManhattanKSUSA

Cytochrome P450 monooxygenases(CYPs)play essential physiological functions in ***303A1 is highly conserved in insect species studied to date,and shows an indispensable role for adult eclosion in both Locusta migratoria and Drosophila ***,how CYP303A1 is regulated to control insect developmental processes remains *** this study,we discovered functional binding sites for miR-184 in the coding sequence of *** luciferase reporter assay showed that miR-184 could target LmCYP303A1 and regulate its expression in ***,overexpression of miR-184 through microinjection of agomir to locusts reduced the transcripts of LmCYP303A1 and led to abnormal molting,which is similar to the phenotype of silencing LmCYP303A1 by direct injection of dsLmCYP303A1 to ***,down-regulation of miR-184 by injection of antagomir increased the LmCYP303A1 transcript and caused molting *** findings suggested that miR-184 could target LmCYP303A1 to regulate the molting process in ***,which might be considered as a novel target for pest control.

关键词： CYP303A1 gene regulation insect molting Locusta migratoria miR-184

Synthesis of Coordination Polymers Using Different Maleic Acid Ligands under Hydrothermal Conditions

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Chemical Research in Chinese Universities 2007年第3期23卷 245-249页

作者： WANG Xiao-lan WANG en-bo XU Xin-xin Institute of Polyoxometalate Chemistry School of Chemistry Northeast Normal University Changchun 130024 P. R. China Department of Chemistry Baicheng Education Normal College Baicheng 137000 P. R. China

A novel coordination polymer, [ Ni （mal）（1,10＇-phen）（ H2O） ] n （ 1 ）（ mal = malate, 1,10＇-phen = 1,10- phenanthroline） was synthesized using malic acid which was generated from maleic acid via hydrothermal reaction. Complex 1, which displays a two-dimensional supramolecular network, was formed by the addition reaction of Ni and maleic acid with water molecules. To our knowledge, several coordination polymers have been directly synthesized from malic acid, but these types of complexes have seldom been synthesized from maleic acid via hydrothermal reactions. When Ni（ Ⅱ ） ion was changed to Zn（ Ⅱ） ion under the same condition, two-dimensional covalent complex 2 [ Zn2 （fma） 2 （1,10＇-phen） 2 ] n （fma = fumatic acid） was formed. Furthermore, complex 2 exhibits intense photolumi- nescent property at room temperature.

关键词： Maleic acid Hydrothermal reaction Mixed ligands Photoluminescent property

Tolerance and chimerism and allogeneic bone marrow/stem cell transplantation in liver transplantation

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World Journal of Gastroenterology 2013年第36期19卷 5981-5987页

作者： Sheng-Li wu Cheng-en Pan Department of Hepatobiliary Surgery First Affiliated Hospital of Xi’an Jiaotong University

The liver has particular tolerogenic properties that allow its spontaneous acceptance in some animal *** structure is considered to favor a tolerogenic *** peripheral tolerance mechanisms also play a role in spontaneous tolerance to liver *** a clinical setting,the main challenge nowadays facing liver transplantation is minimization of immunosuppression with the goal of donor-specific *** involved in tolerance to transplanted organs are complex and partly unknown.A significant mechanism in tolerance induction is *** can be induced through transplantation of allogeneic donor bone marrow/stem cells under appropriate host *** review focuses on the tolerance mechanisms in liver transplantation and highlights the role of chimerism and allogeneic bone marrow/stem cell transplantation in tolerance development.

关键词： Immunotolerance Chimerism bone marrow transplantation Stem cell transplantation Liver transplantation