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Leaf stage-associated resistance is correlated with phytohormones in a pathosystem-dependen manner

Journal of Integrative Plant Biology 2018年第8期60卷 703-722页

作者： You-ping xu Lin-Hui Lv Ya-jing xu Juan Yang Jia-Yi Cao Xin-Zhong Cai State Key Laboratory of Rice Biology Institute of Biotechnology College of Agriculture and Biotechnology Zhejiang University 866 Yu Hang Tang Road Hangzhou 310058 China Centre of Analysis and Measurement Zhejiang University 866 Yu Hang Tang Road Hangzhou 310058 China

It has been reported in several pathosystems that disease resistance can vary in leaves at different stages. However, how general this leaf stage-associated resistance is, and the molecular mechanism（s） underly- ing it, remain largely unknown. Here, we investigated the effect of leaf stage on basal resistance, effector- triggered immunity （ETI） and nonhost resistance, using eight pathosystems involving the hosts Arabidopsis thaliana, Nicotiana tabacum, and N. benthamiana and the pathogens Sclerotinia sclerotiorum, Pseudomonas syringae pv. tabaci, P. syringae pv. tomato DC3000, and Xanthomonas oryzae pv. oryzae （Xoo）. We show evidence that leaf stage-associated resistance exists ubiquitously in plants, but with varying intensity at different stages in diverse pathosystems. Microarray expression profiling assays demonstrated that hundreds of genes involved indefense responses, phytohormone biosynthesis and signaling, and calcium signaling, were differentially expressed between leaves at different stages. The Arabidopsis mutants sid1, sid2-3, ein2, jar1-1, abal and aao3 lost leaf stage-associated resistance to S. sclerotiorum, and the mutants abal and sid2-3 were affected in leaf stage-associated RPS2/AvrRpt2＋-con- ferred ETI, whereas only the mutant sid2-3 influenced leaf stage-associated nonhost resistance to Xoo. Our results reveal that the phytohormones salicylic acid, ethylene, jasmonic acid and abscisic acid likely play an essential, but pathosystem-dependent, role in leaf stage- associated resistance.

关键词： Xoo Figure Leaf stage-associated resistance is correlated with phytohormones in a pathosystem-dependen manner

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Challenges and prospects for room temperature solid-state sodiumsulfur batteries

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Nano Research 2024年第3期17卷 1402-1426页

作者： Yashuang Qiu jing xu Research Center of Grid Energy Storage and Battery Application School of Electrical and Information EngineeringZhengzhou UniversityZhengzhou 450001China

Room temperature sodium-sulfur(Na-S)batteries,known for their high energy density and low cost,are one of the most promising next-generation energy storage ***,the polysulfide shuttling and uncontrollable Na dendrite growth as well as safety issues caused by the use of organic liquid electrolytes in Na-S cells,have severely hindered their ***-state electrolytes instead of liquid electrolytes are considered to be the most direct and effective solution to solve the above ***,its practical application is still greatly challenged due to the poor interfacial compatibility between the all-solid-state electrolytes and the anode/cathode,ionic conductivity,and the shuttle effect caused by the presence of liquid phase in the quasi-solid-state *** paper presents a comprehensive review of solid-state Na-S batteries from the perspective of regulating interfacial compatibility and improving ionic conductivity as well as suppressing polysulfide *** to different components,solid-state electrolytes were divided into five categories:solid inorganic electrolytes,solid polymer electrolytes,polymer/inorganic solid hybrid electrolytes,gel polymer electrolytes,and liquid–solid inorganic hybrid ***,the prospect of developing high performance solid-state electrolytes to improve the cycling stability of room temperature Na-S cells is envisaged.

关键词： sodium-sulfur batteries solid-state electrolytes ionic conductivity polysulfide shuttling interfacial compatibility

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Mechanism Interpretation of the Biological Brain Cooling and Its Inspiration on Bionic Engineering

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Journal of Bionic Engineering 2011年第3期8卷 207-222页

作者： xu xue jing Liu Key Lab of Cryogenics Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China Department of Biomedical Engineering School of Medicine Tsinghua University Beijing 100084 P. R. China

The brain is one of the most important organs in a biological body which can only work in a relatively stable temperature range. However, many environmental factors in biosphere would cause cerebral temperature fluctuations. To sustain and regulate the brain temperature, many mechanisms of biological brain cooling have been evolved, including Selective Brain Cooling （SBC）, cooling through surface water evaporation, respiration, behavior response and using special anatomical ap- pendages. This article is dedicated to present a summarization and systematic interpretation on brain cooling strategies devel- oped in animals by classifying and comparatively analyzing each typical biological brain cooling mechanism from the per- spective of bio-heat transfer. Meanwhile, inspirations from such cooling in nature were proposed for developing advanced bionic engineering technologies especially with two focuses on therapeutic hypothermia and computer chip cooling areas. It is expected that many innovations can be achieved along this way to find out new cooling methodologies for a wide variety of industrial applications which will be highly efficient, energy saving, flexible or even intelligent.

关键词： brain cooling mechanism bionic engineering biolheat transfer thermal window therapeutic hypothermia techniques chip cooling

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COLLABORATIVE DESIGN OF RFID SYSTEMS FOR MULTI-PURPOSE SUPPLY CHAIN APPLICATIONS

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Journal of Systems Science and Systems Engineering 2013年第2期22卷 152-170页

作者： Hongyan DAI jing xu School of Business Central University of Finance and Economics Department of Industrial Engineering Tsinghua University

One of the key challenges for implementing RFID systems in supply chain management is the difficulty in economic justification. Such difficulty is further amplified by its public participation nature as multiple self-interest beneficiaries may receive diverse paybacks, and their incentives to join the system are difficult to align. This paper aims to address these problems by a collaborative design from two aspects. First, we propose to introduce a centralized planning mechanism in the chain to facilitate the participation, so that the cost of the overall system can be minimized. Second, we propose to analyze the multi-facet economic return from multi-purpose applications to achieve the full potential of RFID systems. To illustrate our approach, its application for inventory inaccuracy and product recall in RFID system is presented.

关键词： RFID collaborative design economic justification centralized planning

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Fast algorithms for singular value decomposition and the inverse of nearly low-rank matrices

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National Science Review 2023年第6期10卷 24-27页

作者： Chen xu Weiwei xu Kaili jing Department of Mathematics and Statistics University of Ottawa School of Mathematics and Statistics Xi'an Jiao Tong University School of Mathematics and Statistics Nanjing University of Information Science and Technology

PROBLEM Matrix computation is a fundamental task in science and engineering;it is recognized as one of the seven computational’giants’of massive data analysis [1],analogous to the seven’dwarfs’in highperformance *** recent years,as the scale of datasets rapidly grows,analysts and engineers frequently need to deal with big matrices with a nearly lowrank *** big size of a matrix brings great numerical hurdles to matrix *** this work,we focus on two typical tasks in matrix computation:singular value decomposition (SVD) and matrix inverse on nearly low-rank matrices that are potentially of big sizes.

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A New Functor from D_5-Mod to E_6-Mod

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Acta Mathematica Sinica,English Series 2016年第8期32卷 867-892页

作者： Xiao ping xu Hua Loo-Keng Key Mathematical Laboratory Institute of MathematicsAcademy of Mathematics & System SciencesChinese Academy of Sciences

We find a new representation of the simple Lie algebra of type E6 on the polynomial algebra in 16 variables, which gives a fractional representation of the corresponding Lie group on 16-dimensional space. Using this representation and Shen＇s idea of mixed product, we construct a new functor from Ds-Mod to E6-Mod. A condition for the functor to map a finite-dimensional irreducible Ds-module to an infinite-dimensional irreducible E6-module is obtained. Our results yield explicit constructions of certain infinite-dimensional irreducible weight E6-modules with finite-dimensional weight subspaces. In our approach, the idea of Kostant＇s characteristic identities plays a key role.

关键词： Simple Lie algebra of type E6 simple Lie algebra of type Ds module category functor,irreducibility

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New Algebraic Approaches to Classical Boundary Layer Problems

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Acta Mathematica Sinica,English Series 2011年第6期27卷 1023-1070页

作者： Xiao ping xu Hua Loo-Keng Mathematical Laboratory Institute of MathematicsAcademy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 P. R. China

Classical non-steady boundary layer equations are fundamental nonlinear partial differential equations in the boundary layer theory of fluid dynamics. In this paper, we introduce various schemes with multiple parameter functions to solve these equations and obtain many families of new explicit exact solutions with multiple parameter functions. Moreover, symmetry transformations are used to simplify our arguments. The technique of moving frame is applied in the three-dimensional case in order to capture the rotational properties of the fluid. In particular, we obtain a family of solutions singular on any moving surface, which may be used to study turbulence. Many other solutions are analytic related to trigonometric and hyperbolic functions, which reflect various wave characteristics of the fluid. Our solutions may also help engineers to develop more effective algorithms to find physical numeric solutions to practical models.

关键词： Boundary layer equation symmetry transformation moving frame exponential approach,trigonometric approach hyperbolic approach rational approach

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Mechanical alloying behavior of Nb–Ti–Si-based alloy made from elemental powders by ball milling process

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Rare Metals 2017年第3期36卷 174-182页

作者： Li-jing Zhang Xi-ping Guo State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China

Nb-Ti-Si-based alloy powders were prepared by mechanical alloying （MA） of elemental *** evolutions of morphology,size,phase constituents,crystallite size,lattice strain,composition and internal microstructure,etc.,of the alloy powders were analyzed by X-ray diffraction （XRD）,scanning electron microscopy （SEM）,energy-dispersive spectroscopy （EDS）,laser particle size analyzer and transmission electron microscope （TEM） *** alloy particles are gradually refined and their shapes become globular with the increase in milling *** diffraction peaks of Nb solid solution （Nbss） phase shift toward lower 2θ angles during ball milling from 2 to 5 h,and after that Nbss diffraction peaks shift toward higher 2θ angles with the increase in milling time from 5 to 70 h,which is mainly attributed to the alteration of the lattice parameter of Nbss powders due to the solution of the alloying element atoms into Nb lattice to form *** ball milling process,the decrease in crystallite size and increase in lattice strain of Nbss powders lead to continuous broadening of their diffraction peaks.A typical lamellar microstructure is formed inside the powder particles after ball milling for 5 h and becomes more refined and homogenized with the increase in milling *** 40-h-ball milling,the typical lamellar microstructure disappears and a very homogeneous microstructure is formed *** homogeneous microstmcture is proved to be composed of only supersaturated Nbss phase.

关键词： Mechanical alloying Nb-Ti-Si-based alloy Powder morphology Phase constituents MicrostructureSupersaturated Nb solid solution

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Challenging anticoagulation therapy for multiple primary malignant tumors combined with thrombosis:A case report and review of literature

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World Journal of Clinical Cases 2024年第9期12卷 1704-1711页

作者： Jia-Xin Chen Ling-Ling xu jing-ping Cheng xun-Hua xu Department of Gerontology China Resources and Wisco General HospitalWuhan University of Science and TechnologyWuhan 430080Hubei ProvinceChina Medical College Wuhan University of Science and TechnologyWuhan 430065Hubei ProvinceChina Department of Gerontology China Resources and Wisco General HospitalWuhan 430080Hubei ProvinceChina Department of Radiology China Resources and Wisco General HospitalWuhan 430080Hubei ProvinceChina

BACKGROUND Venous thromboembolism significantly contributes to patient deterioration and *** of its etiology and anticoagulation treatment is intricate,necessitating a comprehensive consideration of various factors,including the bleeding risk,dosage,specific anticoagulant medications,and duration of ***,a case of lower extremity thrombosis with multiple primary malignant tumors and high risk of bleeding was reviewed to summarize the shortcomings of treatment and prudent anticoagulation *** SUMMARY An 83-year-old female patient was admitted to the hospital due to a 2-wk history of left lower extremity edema that had worsened over 2 *** her medical history and relevant post-admission investigations,it was determined that the development of left lower extremity venous thrombosis and pulmonary embolism in this case could be attributed to a combination of factors,including multiple primary malignant tumors,iliac venous compression syndrome,previous novel coronavirus infection,and inadequate treatment for prior thrombotic ***,the selection of appropriate anticoagulant medications,determination of optimal drug dosages,and establishment of an appropriate duration of anticoagulation therapy were important because of concurrent thrombocytopenia,decreased quantitative fibrinogen levels,and renal *** Anticoagulant prophylaxis should be promptly initiated in cases of high-risk *** anticoagulation therapy is required for complex thrombosis.

关键词： Venous thromboembolism Cancer-associated thrombosis Anticoagulation therapy iliac vein compression syndrome COVID-19 Thrombocytopenia Case report

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Partial Differential Equation Approach to E_7

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Acta Mathematica Sinica,English Series 2015年第2期31卷 177-200页

作者： Xiao ping xu Hua Loo-Keng Mathematical Laboratory Institute of Mathematics Academy of Mathematics & System Sciences Chinese Academy of Sciences

By solving certain partial differential equations, we find the explicit decomposition of the polynomial algebra over the 56-dimensional basic irreducible module of the simple Lie algebra E7 into a sum of irreducible submodules. This essentially gives a partial differential equation proof of a combinatorial identity on the dimensions of certain irreducible modules of E7. We also determine two three-parameter families of irreducible submodules in the solution space of Cartan＇s well-known fourth-order Ez-invariant partial differential equation.

关键词： Simple Lie algebra E7 partial differential equation irreducible module decomposition,combinatorial identity

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