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McMYB4 improves temperature adaptation by regulating phenylpropanoid metabolism and hormone signaling in apple

Horticulture Research 2021年第1期8卷 2319-2332页

作者： Suxiao Hao Yanfen Lu Zhen Peng Enying Wang Linke Chao Silin Zhong Yuncong Yao Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing University of AgricultureBeijing 102206China Beijing Bei Nong Enterprise Management Co.Ltd Beijing 102206China Plant Science and Technology College Beijing University of AgricultureBeijing 102206China Beijing Key Laboratory for Agricultural Application and New Technique Beijing University of AgricultureBeijing 102206China College of Forestry Beijing Forestry UniversityBeijing 100083China College of Life Science The Chinese University of Hong KongHong KongChina

Temperature changes affect apple development and *** metabolism and hormone signaling play a crucial role in regulating apple growth and development in response to temperature ***,we found that McMYB4 is induced by treatment at 28℃ and 18℃,and McMYB4 overexpression results in flavonol and lignin accumulation in apple *** one-hybrid(Y1H)assays and electrophoretic mobility shift assays(EMSAs)further revealed that McMYB4 targets the promoters of the flavonol biosynthesis genes CHS and FLS and the lignin biosynthesis genes CAD and ***4 expression resulted in higher levels of flavonol and lignin biosynthesis in apple during growth at 28℃ and 18℃ than during growth at 23℃.At 28℃ and 18℃,McMYB4 also binds to the AUX/ARF and BRI/BIN promoters to activate gene expression,resulting in acceleration of the auxin and brassinolide signaling *** together,our results demonstrate that McMYB4 promotes flavonol biosynthesis and brassinolide signaling,which decreases ROS contents to improve plant resistance and promotes lignin biosynthesis and auxin signaling to regulate plant *** study suggests that McMYB4 participates in the abiotic resistance and growth of apple in response to temperature changes by regulating phenylpropanoid metabolism and hormone signaling.

关键词： phenyl acceleration metabolism

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Utilizing surface acidity/ basicity engineering for boosting the activity and chromium tolerance of oxygen electrode for reversible solid oxide cells

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Chemical Engineering Journal 2025年 519卷

作者： Xucong Liu Yitong Li Chunyan Xiong Bo Chi Jian Pu Center for Fuel Cell Innovation School of Materials Science and Engineering Huazhong University of Science & Technology Wuhan Hubei 430074 China Hubei Provincial Research Centre of Engineering & Technology for New Energy Materials Hubei Key Lab of Novel Reactor & Green Chemical Technology Key Laboratory for Green Chemical Process of Ministry of Education School of Chemical Engineering and Pharmacy Wuhan Institute of Technology Wuhan 430205 China

Cr-containing metal interconnects degrade air electrodes, substantially shortening the lifespan of Reversible Solid Oxide Cells (RSOCs) and hindering their commercialization. In this study, the electrochemical performance and chromium tolerance of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-σ (LSCF) were enhanced through the regulation of surface acidity and basicity. The applied basic oxides can effectively regulate the surface acidity/basicity of the electrodes, thereby enhanced the surface exchange kinetics of the oxygen electrode. After modification with basic oxides, LSCF attained a peak power density (PPD) of 1.9 W/cm 2 in fuel cell mode and an electrolysis current density of 1.63 A/cm 2 at 1.3 V with 50 % H 2 O + 50 % H 2 in electrolysis mode at 750 °C. Compared to pure LSCF, the LSCF modified with basic oxides exhibited excellent stability under accelerated Cr poisoning conditions both in solid oxide fuel cell (SOFC) mode and solid oxide electrolysis cell (SOEC) mode. The effect of the acidity and alkalinity of the oxide on the Cr-tolerance of the electrode was further evaluated by the d-band center and work function. The improvement in Cr-tolerance was attributed to the regulation of the surface acidity/basicity of the oxygen electrode by the applied basic oxides, restoring the surface conditions affected by acidic Cr compounds. The surface acidity/basicity engineering strategy presented in this study offers a new approach for designing and developing oxygen electrodes with exceptional catalytic activity and Cr-tolerance.

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Sulfur Doped Hollow Carbon Nanofiber Anodes for Fast-Charging Potassium-Ion Storage

SSRN

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SSRN 2022年

作者： Wang, Fei Li, Du Zhang, Guanhua Li, Jingyuan Zhang, Chengzhi Wei, Donghai Yang, Jianxiao Ye, Chong Tan, Jun Liu, Jinshui State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle Engineering Hunan University Changsha410082 China Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology College of Materials Science and Engineering Hunan University Changsha410082 China Ji Hua Laboratory Guangdong Foshan528000 China

Sulfur doping can bridge durable active sites, induce C-S electron coupling to produce unparalleled Faraday conversion, break the limitations of ion storage capacitance, and therefore is an effective way to design carbon materials with improved electrochemical performance. However, sulfur doping mechanism, especially how to design S-rich by atomic transition among carbon membered-ring structure of anodes remains a confusing topic. Herein, the linear relationship between sulfur and nitrogen content is found, and the tendency of sulfur to replace pyrrolic nitrogen is demonstrated. The sulfur replaces part of nitrogen atoms and form C-S bonds with binds covalently to carbon skeleton, where S-rich hollow carbon nanofibers (NHCFs-S) are synthesized. The introduction of high S-doping in carbon results to the improvement of conductivity, Faraday reaction activity and pseudocapacitive adsorption behavior. For potassium-ion batteries, the fabricated NHCFs-S material delivers a 369 mAh g−1 high capacity at 1.0 A g−1 after 100 cycles with 80% initial coulombic efficiency and a desirable rate capability of 261 mAh g−1 even at 5.0 A g−1. This work provides a selection for high-performance anodes design and a reference for the future research of high sulfur doped in carbon materials. © 2022, The Authors. All rights reserved.

关键词： Sulfur

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RETRACTION: Production of viable chicken by allogeneic transplantation of primordial germ cells induced from somatic cells (Retraction of Vol 12, art no 2989, 2021)

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NATURE COMMUNICATIONS 2023年第1期14卷 1-1页

作者： Zhao, Ruifeng Zuo, Qisheng Yuan, Xia Jin, Kai Jin, Jing Ding, Ying Zhang, Chen Li, Tingting Jiang, Jingyi Li, Jiancheng Zhang, Ming Shi, Xiang Sun, Hongyan Zhang, Yani Xu, Qi Chang, Guobin Zhao, Zhenhua Li, Bing Wu, Xinsheng Zhang, Yang Song, Jiuzhou Chen, Guohong Li, Bichun Key Laboratory of Animal Breeding Reproduction and Molecular Design for Jiangsu Province College of Animal Science and Technology Yangzhou University Yangzhou China Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China Yangzhou University Yangzhou China The Poultry Research Institute of Chinese Academy of Agricultural Sciences Yangzhou China Department of Animal & Avian Sciences University of Maryland College Park MD USA

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A transfer learning based geometric position-driven machining error prediction method for different working conditions*

A transfer learning based geometric position-driven machinin...

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International Conference on Mechatronics and Machine Vision in Practice (M2VIP)

作者： Teng Zhang Hao Sun Lin Zhou Shengqiang Zhao Fangyu Peng Rong Yan National NC System Engineering Research Center School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan China Wuhan Digital Design and Manufacturing Innovation Center Co. Ltd China Wuhan China State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781665431545

Machining error is one of the most important indicators to evaluate the processing quality of thin-walled parts. With the development of Data science, the data-driven methods have become popular. But the condition that the model can work accurately on a new task is that the feature space and distribution of the data are the same. A sample-based transfer learning method driven by geometric position is utilized to quickly predict the machining errors of thin-walled parts under different working conditions. This method can fully learn the knowledge related to machining errors contained in the data through model training, and can apply this knowledge to accurately and quickly forecast machining errors under new working conditions. In the experimental scenario, this method has outstanding predictive performance. The average determination coefficient of the four groups of target domain experiments reached 0.96, and the average root mean square error is less than the machining error acquisition time to 22% of the original, reducing the dependence on time-consuming and expensive measurements greatly.

关键词： Employee welfare Training Mechatronics Transfer learning Machining Predictive models Data models

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Natural Convection of a 2D Cavity with Bottom Heating: Discrete Versus Continuous Heating Distributions

SSRN

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SSRN 2023年

作者： Meng, Xinyu Bergadà, Josep M. Mellibovsky, Fernando Sang, W. Min An, Bo School of Aeronautics Northwestern Polytechnical University Xi’an China National Key Laboratory of Science and Technology On Aerodynamic Design and Research Shaanxi Xi’an710072 China Key Laboratory of Icing and Anti/De-icing China Aerodynamics Research and Development Center Sichuan Mianyang621000 China Department of Fluid Mechanics Universitat Politécnica de Catalunya Barcelona08034 Spain China Aerodynamics Research and Development Center China

We present a study on natural convection in square cavities with both continuous and discrete heating distributions by using lattice Boltzmann method. For all cases studied, the lower surface is heated, the right one is considered as a partially cooling boundary, and the rest region of the walls are defined as adiabatic. The comparison on flow and heat transfer between two different heating distributions is presented. The effects on the unit heating source length ([[EQUATION]]), the spacing (d) between two separate heating sources, and the total number of the heating sources (n) on convection are revealed. The novelty resides in the fact that we compare the flow performance differences between employing continuously and discretely distributed heating strategies, the effect of which is discussed. Besides, the thermal boundary conditions are different from the ones used other studies [1-19], being for the present study, the bottom wall partially or entirely heated, the right sidewall partially cooled and the rest of the walls are adiabatic. Moreover, the discrete distribution is employed as equi-spaced in the present study. The combined effect of three parameters [[EQUATION]], d and n on heat transfer is analyzed. For practical purpose, our conclusions lead to a more appropriate strategy for indoor heating, specifically when the budget of total heating length ([[EQUATION]]) is limited, or the cost-saving is considered. © 2023, The Authors. All rights reserved.

关键词： Natural convection

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A Global-Adaptive Discretization of Velocity Space for General Deterministic Frameworks in Predictions of Rarefied and Multi-Scale Flows

SSRN

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SSRN 2023年

作者： Chen, Jianfeng Liu, Sha Zhong, Chengwen Zhang, Rui Yang, Yanguang Zhuo, Congshan School of Aeronautics Northwestern Polytechnical University Shaanxi Xi’an710072 China Institute of Extreme Mechanics Northwestern Polytechnical University Shaanxi Xi’an710072 China National Key Laboratory of Science and Technology on Aerodynamic Design and Research Northwestern Polytechnical University Shaanxi Xi’an710072 China China Aerodynamics Research and Development Center Mianyang621000 China

The rarefied and multi-scale flows are complex systems composed by different scales and mechanics, the modeling and numerical prediction of these multiple-regime flows are very critical for the aerodynamic design of spacecraft, ultra-low orbital vehicles and plumes. By introducing a discrete velocity space (DVS), the deterministic methods, such as the discrete velocity method (DVM) and unified methods, can capture complex and non-equilibrium velocity distribution functions (VDFs) and describe flow behaviors exactly. However, a high resolution is required due to the extremely steep slope and high concentration of the gas VDFs in DVS, and the number of discrete velocity points for a Cartesian velocity space (CVS) is very large. Moreover, the amount of discrete velocity points is also increased for high Mach number since the DVS needs to cover a larger area. As a result, it is very costly for deterministic methods to describe high-speed flows with CVS. Therefore, in order for the deterministic solvers to be useful in complex rarefied and multi-scale flows, adaptive velocity space (AVS) is *** paper makes two improvements to the AVS approach, which is then incorporated into a general deterministic frameworks, such as the unified gas-kinetic scheme (UGKS). Firstly, a global velocity mesh rather than a local velocity mesh is used to maintain the program's high level of parallelism. More importantly, when the local velocity mesh is inconsistent on both sides of the physical interface, the gradient of the VDFs must be used to calculate the microscopic fluxes at the interface, which causes stability and computational issues. In contrast, the global velocity mesh does not require interpolation and is very robust. Secondly, the tree data structure is used to record the DVS and the ``consanguinity" relationship is used to reconstruct the VDFs on the new *** other words, a split child node's VDF is the same as its parent's VDF, and a merged parent's VDF is the avera

关键词： Interpolation

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High-order kinetic flow solver based on the flux reconstruction framework

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Physical Review E 2020年第4期102卷 043306-043306页

作者： Ji Li Chengwen Zhong Sha Liu National Key Laboratory of Science and Technology on Aerodynamic Design and Research Northwestern Polytechnical University Xi'an Shaanxi 710072 China

The goal of this paper is to develop a high-order numerical method based on the kinetic inviscid flux (KIF) method and flux reconstruction (FR) framework. The KIF aims to find a balance between the excellent merits of the gas-kinetic scheme (GKS) and the lower computational costs. The idea of KIF can be viewed as an inviscid-viscous splitting version of the gas-kinetic scheme, and Shu and Ohwada have made the fundamental contribution. The combination of totally thermalized transport (TTT) scheme and kinetic flux vector splitting (KFVS) method are achieved in KIF. Using a coefficient which is related to time step and averaged collision time, KIF can adjust the weights of TTT and KFVS flux in the simulation adaptively. By doing the inviscid-viscous splitting, KIF is very suitable and easy to integrate into the existing framework. The well-understood FR framework is used widely for the advantages of robustness, economical costs, and compactness. The combination of KIF and FR is originated by three motivations. The first purpose is to develop a high-order method based on the gas-kinetic theory. The second reason is to keep the advantages of GKS. The last aim is that the designed method should be more efficient. In present work, we use the KIF method to replace the Riemann flux solver applied in the interfaces of elements. The common solution at the interface is computed according to the gas-kinetic theory, which makes the combination of KIF and FR scheme more reasonable and available. The accuracy and performance of present method are validated by several numerical cases. The Taylor-Green vortex problem has been used to verify its potential to simulate turbulent flows.

关键词： Aerodynamics Boundary layers High-speed flow Turbulence

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Coupled fluid-thermal investigation on non-ablative thermal protection system with spiked body and opposing jet combined configuration

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Chinese Journal of Aeronautics 2019年第6期32卷 1390-1402页

作者： Jie HUANG Weixing YAO Xianyang SHAN State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle Nanjing University of Aeronautics and AstronauticsNanjing 210016China System Design Institute Hubei Aerospace Technology AcademyWuhan 430040China

In this paper, a Non-Ablative Thermal Protection System(NATPS) with the spiked body and the opposing jet combined configuration is proposed to reduce the aerodynamic heating of the hypersonic vehicle, and the coupled fluid-thermal numerical analysis is performed to study the thermal control performance of the NATPS. The results show that the spiked body pushes the bow shock away from the protected structure and thus reduces the shock intensity and the wall heat flux. In addition, the low temperature gas of the opposing jet separates the high temperature gas behind the shock from the nose cone of the spiked body, ensuring the non-ablative property of the spiked body. Therefore, the NATPS reduces the aerodynamic heating by the reconfiguration of the flow field, and the thermal control efficiency of the system is better than the Thermal Protection System(TPS) with the single spiked body and the single opposing jet. The influencing factors of the NATPS are analyzed. Both increasing the length of the spiked body and reducing the total temperature of the opposing jet can improve the thermal control performance of the NATPS and the nonablative property of the spiked body. However, increasing the heat conductivity coefficient of the spiked body can enhance benefit the non-ablative property of the spiked body, but has little influence on the thermal control performance of the NATPS.

关键词： Coupled method Non-ablative Opposing jet Spiked body Thermal protection system

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Realization of the Kane-Mele model in XN4-embedded graphene (X=Pt, Ir, Rh, Os)

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Physical Review B 2021年第23期104卷 235157-235157页

作者： Haonan Wang Qian Niu Zhenhua Qiao CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics and Department of Physics University of Science and Technology of China Hefei Anhui 230026 China Department of Physics Washington University in St. Louis St. Louis Missouri 63130 USA International Center for Quantum Design of Functional Materials University of Science and Technology of China Hefei Anhui 230026 China

Monolayer graphene embedded with a transition metal nitride (i.e., XN4) has been experimentally synthesized recently, where a transition metal atom together with four nitrogen atoms as a unit are embedded in graphene to form a stable planar single-atom-thick structure. We provide a systematic study on the structural, electronic, and topological properties of these XN4-embedded graphene structures by utilizing both first-principles calculations and a tight-binding model. We find that XN4-embedded graphene (X=Pt, Ir, Rh, Os) can open topologically nontrivial band gaps that host two-dimensional Z2 topological insulators. We further show that the low-energy bands near the band gaps can be perfectly captured by a modified Kane-Mele model Hamiltonian. Our work not only provides concrete two-dimensional materials that are very rare to realize two-dimensional Z2 topological insulators, but also makes the graphene system to be realistic in hosting Kane-Mele type Z2 topological insulators.

关键词： Kane-Mele model Topological insulators Topological phases of matter Density functional theory

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