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Rare Metals 2022年第7期41卷 2343-2348页

作者： ji-tao Zhang Yu-Mei Wen Ping Li Research Center of Sensors and Instruments College of Optoelectronic EngineeringChongqing UniversityChongqing 400044China Department of Smart Grids and Information Engineering College of Electric and Information EngineeringZhengzhou University of Light IndustryZhengzhou 450002China

A passive current sensor,consisting of SmFe_(2)/PZT/SmFe_(2)self-biased magnetoelectric(ME)composite and Fe_(73.5)Cu_(1)Nb_(3)Si_(13.5)B_(9)nanocrystalline flux concentrator for weak current detection at power-line frequency,was fabricated and *** magnetostrictive material of SmFe_(2)plate with large anisotropic constant provides a huge internal anisotropic field to bias the ME transducer in closed magnetic ***,the additional magnetomotive force induced by the internal field and the corresponding increased effective permeabil-ity contribute to the improvement of the *** results demonstrate that the presented sensor has a higher sensitivity of 152 mV·A^(-1)at 50 Hz with a slight nonlinearity of~0.01%full scale(FS)and matches well with the predicted *** presented current-sensing device exhibits approximately 2.3 times higher sensitivity than that of conventional ME composite with[Pb(Zr_(0.48),Ti_(0.52)O_(3)](PZT)and Terfenol-D plates serving as a key sensitive *** addition,time stabilities of the presented sensor were evaluated for a long period of 72 h and analyzed through mathematical statistics method,and favorable stabilities with an uncertainty of 0.5μV are obtained in continuous 1 h *** results provide a significant advancement toward promising application of the tri-layer self-biased ME laminate for power-line elec-tric cords monitoring.

关键词： Magnetoelectric effects Current sensor Magnetic flux concentrator Magnetostrictive rare earth iron alloys

Global Existence of Solutions for Stochastic Impulsive Differential Equations

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Acta Mathematica Sinica,English Series 2011年第4期27卷 773-780页

作者： Li Juan SHEN ji tao SUN Department of Mathematics Tongji University Shanghai 200092 P. R. China Department of Mathematics Luoyang Normal University Luoyang 471022 P. R. China

In this paper we obtain some results on the global existence of solution to It5 stochastic impulsive differential equations in u（[0,∞）,Rn）which denotes the family of Rn-valued stochastic processes x satisfying supt∈[0,∞）E｜x（t）｜2〈∞ under non-Lipschitz coefficients. The Schaefer fixed point theorem is employed to achieve the desired result. An example is provided to illustrate the obtained results.

关键词： Stochastic differential equations impulse global existence

Generalizing Lyubashevsky-Wichs trapdoor sampler for NTRU lattices

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Science China(Information Sciences) 2022年第5期65卷 273-275页

作者： Yang tao Yunfeng ji Rui ZHANG State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of Sciences School of Cyber Security University of Chinese Academy of Sciences

Dear editor,At the core of lattice-based cryptography, a linear function f（x） = Ax mod q with a random matrix A ∈ Z;and a short vector x ∈ Z;plays an essential role, especially in the lattice-based signature, identity-based encryption and attribute-based encryption. It is a one-way function introduced by Ajtai and with a proper trapdoor, the short solution x can be recovered without leaking any trapdoor information, thus a trapdoor sampler.

关键词： trapdoor sampler NTRU lattice hash-and-sign lattice-based signature post-quantum cryptography

3-restricted connectivity of graphs with given girth

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Applied Mathematics(A Journal of Chinese Universities) 2008年第3期23卷 351-358页

作者： GUO Li-tao MENG ji-xiang College of Math. and Sys. Sci. Xinjiang Univ. Xinjiang 830046 China

Let G = （V, E） be a connected graph. X belong to V（G） is a vertex set. X is a 3-restricted cut of G, if G- X is not connected and every component of G- X has at least three vertices. The 3-restricted connectivity κ3（G）（in short κ3） of G is the cardinality of a minimum 3-restricted cut of G. X is called κ3-cut, if ｜X｜ = κ3. A graph G is κ3-connected, if a 3-restricted cut exists. Let G be a graph girth g ≥ 4, κ3（G） is min{d（x）＋ d（y）＋ d（z） - 4 ： xyz is a 2-path of G}. It will be shown that κ3（G） = ξ3（G） under the condition of girth.

关键词： 3-restricted cut 3-restricted connectivity girth

The Problem of Split Convex Feasibility and Its Alternating Approximation Algorithms

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Acta Mathematica Sinica,English Series 2015年第12期31卷 1857-1871页

作者： Zhen Hua HE ji tao SUN Department of Mathematics Tongji University Department of Mathematics Honghe University

This paper studies the problem of split convex feasibility and a strong convergent alternating algorithm is *** to this algorithm,some strong convergent theorems are obtained and an affirmative answer to the question ... 详细信息

关键词： Alternating algorithm problem of split convex feasibility strong convergent theorem

Review of Fault-tolerant Control for Motor Inverter Failure with Operational Quality Considered

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CES Transactions on Electrical Machines and Systems 2024年第2期8卷 202-215页

作者： Yuxuan Du Wenxiang Zhao Yihua Hu jinghua ji tao tao IEEE School of Electrical and Information Engineering Jiangsu University Department of Engineering King’s College London

In recent years,motor drive systems have garnered increasing attention due to their high efficiency and superior control *** is especially apparent in aerospace,marine propulsion,and electric vehicles,where high performance,efficiency,and reliability are *** ability of the drive system to maintain long-term fault-tolerant control(FTC)operation after a failure is *** likelihood of inverter failures surpasses that of other components in the drive system,highlighting its critical ***-term FTC operation ensures the system retains its fundamental functions until safe repairs or replacements can be *** focus of developing a FTC strategy has shifted from basic FTC operations to enhancing the post-fault quality to accommodate the realities of prolonged operation *** paper primarily investigates FTC strategies for inverter failures in various motor drive systems over the past *** strategies are categorized into three types based on post-fault operational quality:rescue,remedy,and *** paper discusses each typical control strategy and its research focus,the strengths and weaknesses of various algorithms,and recent advancements in ***,this review summarizes effective FTC techniques for inverter failures in motor drive systems and suggests directions for future research.

关键词： Fault-tolerant Motor drive Operation quality Inverter failure

Sedimentary-tectonic interaction on the growth sequence architecture within the intraslope basins of deep-water Niger Delta Basin

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Journal of Palaeogeography 2023年第1期12卷 107-128页

作者： jia-jia Zhang Sheng-He Wu Guang-Yi Hu Da-Li Yue Cheng Chen Mei Chen ji-tao Yu Qi-Cong Xiong Li-Qiong Wang College of Geosciences State Key Laboratory of Petroleum Resource and ProspectingChina University of Petroleum(Beijing)Beijing 102249China Research Institute China National Offshore Oil CorporationBeijing 100028China The Fourth Gas Production Plant Changqing Oilfield CompanyPetroChinaOrdos 017300Inner Mongolia Autonomous RegionChina

This paper presents a 3D seismic-based case study from the deep-water Niger Delta Basin to investigate sedimentary-tectonic interaction on growth sequence architecture within the thrust-related intraslope or piggyback basins. Gravitational contraction in the lower continental slope had yielded a series of thrust faults and associated folds in the study area, which formed several piggyback basins. These basins were filled by a suite of growth sequences with varying stratigraphic architecture. Analysis of the 3D seismic data recognized three primary seismic facies types respectively as: convergent, draping and chaotic, which contain seven subtypes. These facies types are combined to form different filling successions for convergent or chaotic growth sequences. The convergent growth sequences mainly occur in the deep section of basin fills during strong gravitational deformation, and always began with convergent-baselapping strata succeeded by convergent-thinning strata, representing pond-to-bypass transition in the ponded-basin accommodation space. The chaotic growth sequences mainly occur in the shallow section of basin fills in response to weak gravitational deformation, and usually began with debris-flow deposits succeeded by channel-levee complexes, reflecting dominant erosion-bypass processes in the slope accommodation space. A dynamic fill-andspill model considering relationship between episodic sedimentation rate and structural growth rate is proposed to explain the formative mechanisms of growth strata units and associated successions. Interaction between glaciation or deglaciation and sea-level change and gravitational deformation history are suggested to be the factor which resulted in the complex stratal stacking patterns, including progradational or retrogradational stacking patterns within convergent growth sequences, and progradational stacking patterns within chaotic growth sequences.

关键词： Intraslope basin Gravitational deformation Growth sequence Stratigraphic architecture Niger Delta Basin

Effects of La addition on the microstructure and tensile properties of Al-Si-Cu-Mg casting alloys

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International Journal of Minerals,Metallurgy and Materials 2015年第4期22卷 405-410页

作者： tao Lu Ye Pan ji-li Wu Shi-wen tao Yu Chen School of Materials Science and Engineering Southeast University jiangsu Key Laboratory of Advanced Metallic Materials Southeast University

The effects of La addition on the microstructure and tensile properties of B-refmed and Sr-modified A1-1 1Si-1.5Cu-0.3Mg cast- ing alloys were investigated. With a trace addition of La （0.05wt%-0. lwt%）, the mutual poisoning effect between B and Sr can be neutral- ized by the formation of LaB6 rather than SrB6. By employing a La/B weight ratio of 2：1, uniform microstructures, which are characterized by well refined ct-A1 grains and adequately modified eutectic Si particles as well as the incorporation of precipitated strengthening intermetal- lics, are obtained and lead to appreciable tensile properties with an ultimate tensile strength of 270 MPa and elongation of 5.8%.

关键词： aluminum silicon alloys rare earth addition lanthanum microstructure tensile properties precipitates

Secretogranln-II plays a critical role in zebrafis neurovascular modeling

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Journal of Molecular Cell Biology 2018年第5期10卷 388-401页

作者： Binbin tao Hongling Hu Kimberly Mitchell ji Chen Haibo jia Zuoyan Zhu Vance L. Trudeau Wei Hu State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 China University of the Chinese Academy of Sciences Beijing 10049 China Department of Biology University of Ottawa Ottawa Ontario K1N 6N5 Canada Key Laboratory of Molecular Biophysics of Ministry of Education College of Life Science and Technology HuaZhong University of Science and Technology Wuhan 430074 China

Secretoneurin （SN） is a neuropeptide derived from specific proteolytic processing of the precursor secretogranin II （Sgll）. In zebrafish and other teleosts, there are two paralogs named sglla and sgllb. Our results showed that neurons expressing sgllb were aligned with central arteries in the hindbrain, demonstrating a close neurovascular association. Both sgllb-/- and sgllo-/-/sgllb-/- mutant embryos were defective in hindbrain central artery development due to impairment of migration and proliferation of central artery cells. Further study revealed that sgllb is non-ceU autonomous and required for central artery development. Hindbrain arterial and venous network identities were not affected in sgllb-/- mutant embryos, and the mRNA levels of Notch and VEGF pathway-related genes were not altered. However, the activation of MAPK and PI3K/AKT pathways was inhibited in sgllb-/- mutant embryos. Reactivation of MAPK or PI3K/AKT in endothelial cells could partially rescue the central artery developmental defects in the sgllb mutants. This studV provides the first in vivo evidence that sgllb ptavs a critical rote in neurovascutar modeling of the hindbrain. Targeting the Sgll system may, therefore, represent a new avenue for the treatment of vascular defects in the central nervous system.

关键词： Secretogranin-II secretoneurin TALENs neurovascular zebrafish

Infinitely Many Solutions for Schrödinger–Choquard–Kirchhoff Equations Involving the Fractional p-Laplacian

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Acta Mathematica Sinica,English Series 2021年第2期37卷 315-332页

作者： Li WANG tao HAN ji Xiu WANG College of Science East China Jiaotong UniversityNanchang 330013P.R.China School of Mathematics and Statistics Hubei University of Arts and ScienceXiangyang 441053P.R.China

In this article,we show the existence of infinitely many solutions for the fractional p-Laplacian equations of Schrödinger–Kirchhoff type equation M([u]_(s,p)^(p))(−Δ)_(p)^(s)u+V(x)|u|^(p−2)u=λ(Iα∗|u|^(p_(s,α)^(∗)))|u|^(p_(s,α)^(∗)−2)u+βk(x)|u|^(q−2)u,x∈R^(N),where(−Δ)s p is the fractional p-Laplacian operator,[u]s,p is the Gagliardo p-seminorm,0jikiya’s new version of the symmetric mountain pass lemma,we obtain the existence of infinitely many solutions which tend to zero for suitable positive parameters λ and β.

关键词： Schrödinger–Choquard–Kirchhoff type fractional p-Laplacian variational methods critical Sobolev exponent