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Particuology 2014年第2期12卷 60-65页

作者： Bin Xu ya wu Pengyi Cui Department of Environmental Engineering Tongji University State Key Laboratory of Pollution Control and Resource Reuse Tongji University

In this study, a semi-analytical model was developed to illustrate the relationship between filtration performance （filtration efficiency and pressure drop） and dust loading under two different particle deposit structures based on theoretical analysis and computational fluid dynamic （CFD） technology. Under the compact deposit structure, within the practical parameter ranges （fiber diameter, air velocity, dust loading mass）, a slight efficiency enhancement （∽10%） occurred at the most penetration particle size （MPPS） and pressure drop increased significantly （∽100%） in response to the solidity increase from 5% to 15%. However, under the dendritic particle deposit structure, both filtration efficiency （∽40%） and pressure drop （4600%） increased significantly with the same solidity increase due to the larger air velocity and swerve change between fibers.

关键词： Particle filtrationDeposition structureLiquid droplet filtrationFilter dust loading

Transcriptional Regulation of Plant Secondary Metabolism

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Journal of Integrative Plant Biology 2012年第10期54卷 703-712页

作者： Chang-Qing yang Xin Fang Xiu-Ming wu Ying-bo Mao Ling-Jian Wang Xiao-ya Chen National Key Laboratory of Plant Molecular Genetics Institute of Plant Physiology and Ecology Shanghai Institutes for BiologicalSciences the Chinese Academy of Sciences Shanghai 200032 China plant Science Research Center. Shanahai Chensh-an botanical Garden. Shanahai 201602. China

Plant secondary metabolites play critical roles in plant-environment interactions. They are synthesized in different organs or tissues at particular developmental stages, and in response to various environmental stimuli, both biotic and abiotic. Accordingly, corresponding genes are regulated at the transcriptional level by multiple transcription factors. Several families of transcription factors have been identified to participate in controlling the biosynthesis and accumulation of secondary metabolites. These regulators integrate internal （often developmental） and external signals, bind to corresponding cis-elements -- which are often in the promoter regions -- to activate or repress the expression of enzyme-coding genes, and some of them interact with other transcription factors to form a complex. In this review, we summarize recent research in these areas, with an emphasis on newly-identified transcription factors and their functions in metabolism regulation.

关键词： Alkaloid phenylpropanoid secondary metabolism terpenoid transcription factor.

Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

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Science China Chemistry 2025年第01期 288-296页

作者： Shuai Liu Wen-Qiang Xu Ying-Tong Di Man-Cheng Tang Ding-Kang Chen Ming-Ming Cao yao-Wen Chang Hong-Yu Tang Chun-Mao Yuan Jun-bo yang Zhi-Li Zuo Han Guo Zi-Fei Xu Ying Zeng Yun-Dong wu Xiao-Jiang Hao Key Laboratory of Phytochemistry and Natural Medicines (Chinese Academy of Sciences) Kunming Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen Bay Laboratory State Key Laboratory of Microbial Metabolism School of Life Sciences & Biotechnology Shanghai Jiao Tong University State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany Chinese Academy of Sciences Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany Chinese Academy of Sciences Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical Sciences

In the intricate process of natural product biosynthesis, a metabolon can enhance metabolic flux by associating sequential enzymes. A fungal metabolon, comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G, is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide B. Using notoamide E as a substance, Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation, followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium unit. Subsequently,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol rearrangement. This provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

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High-temperature wetting behavior between slag and refractory

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Journal of Iron and Steel Research International 2024年第6期31卷 1304-1319页

作者： Yong-xin Wang ya-ge Li ya-bo Gao Zhong Huang Hai-jun Zhang The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina

Slag corrosion is one of the main factors of the damage of refractory,and its primary manifestations involve the melting of refractory in slag and the slag penetration into refractory,both of which are highly related to the wetting behavior between slag and *** high-temperature wettability could be characterized by parameters including the surface tension,adhesion work,and spreading coefficient of the slag on refractory surface,and it could be suppressed by altering the slag/refractory interface,thus resulting in an improved anti-corrosion *** this,the key knowledges of the slag corrosion,theory of wetting behavior and test of high-temperature contact angle were firstly ***,the major factors influencing the high-temperature slag wetting behavior were discussed based on the aspects of slag composition,refractory composition,and surface ***,the future research direction was proposed in this field.

关键词： High-temperature wetting Refractory Slag corrosion Surface tension

Novel Adaptive Memory Event-Triggered-Based Fuzzy Robust Control for Nonlinear Networked Systems via the Differential Evolution Algorithm

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IEEE/CAA Journal of Automatica Sinica 2024年第8期11卷 1836-1848页

作者： Wei Qian yanmin wu bo Shen School of Electrical Engineering and Automation Henan Polytechnic UniversityJiaozuo 454000China College of Information Science and Technology Donghua UniversityShanghai 201620China

This article mainly investigates the fuzzy optimization robust control issue for nonlinear networked systems characterized by the interval type-2(IT2)fuzzy technique under a differential evolution *** provide a more reasonable utilization of the constrained communication channel,a novel adaptive memory event-triggered(AMET)mechanism is developed,where two event-triggered thresholds can be dynamically adjusted in the light of the current system information and the transmitted historical *** conditions with less conservative design of the fuzzy imperfect premise matching(IPM)controller are presented by introducing the Wirtinger-based integral inequality,the information of membership functions(MFs)and slack ***,under the IPM policy,a new MFs intelligent optimization technique that takes advantage of the differential evolution algorithm is first provided for IT2 TakagiSugeno(T-S)fuzzy systems to update the fuzzy controller MFs in real-time and achieve a better system control ***,simulation results demonstrate that the proposed control scheme can obtain better system performance in the case of using fewer communication resources.

关键词： Adaptive memory event-triggered(AMET) differential evolution algorithm fuzzy optimization robust control interval type-2(IT2)fuzzy technique.

C^1 conforming quadrilateral finite elements with complete secondorder derivatives on vertices and its application to Kirchhoff plates

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Science China(Technological Sciences) 2020年第6期63卷 1066-1084页

作者： wu yang XING YuFeng LIU bo Institute of Solid Mechanics Beihang UniversityBeijing 100191China

The classical problem of the construction of C^1 conforming single-patch quadrilateral finite elements has been solved in this investigation by using the blending function interpolation *** order to achieve the C^1 conformity on the interfaces of quadrilateral elements,complete second-order derivatives are used at the element vertices,and the information of geometrical mapping is also considered into the construction of shape *** is found that the shape functions and the polynomial spaces of the present elements vary with element ***,the developed quadrilateral elements are at least third order for general quadrilateral shapes and fifth order for rectangular ***,very fast convergence can be achieved.A promising feature of the present elements is that they can be used in cooperation with those high-precision rectangular and triangular *** the present elements are over conforming on element vertices,an approach for handling problems of material discontinuity is also *** examples of Kirchhoff plates are employed to demonstrate the computational performance of the present elements.

关键词： finite element method quadrilateral elements C^1 conforming Kirchhoff plates

The influence of Tethyan evolution on changes of the Earth's past environment

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Science China Earth Sciences 2023年第12期66卷 2653-2665页

作者： bo WAN Fuyuan wu Rixiang ZHU State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

Understanding changes in Earth's past can provide valuable insights into prediction of its *** example is the interactions between the internal and external spheres of *** cyclical northward breakup-drift of Gondwana,driven by the opening and closure of Proto-,Paleo-,and Neo-Tethyan oceans,facilitated the transfer of landmasses from the southern to the northern hemisphere,traversing the tropic *** have observed a compelling correlation between episodic increases in landmass area within the tropic regions(those lying at less than 20°latitude)and a subsequent temperature decrease during the three major glacial periods in the last 500 million *** phenomenon can be attributed to low latitude regions receiving more solar energy influx on Earth's surface than high latitude *** addition,an increase of landmass in tropic regions(low latitude)attenuates the net energy absorption by the Earth's surface,consequently impeding the conduction and convection of absorbed energy toward the *** result is a decrease in global surface *** tropic regions,benefiting from abundant sunlight,create an ideal environment for the proliferation of marine plankton *** species are important in the generation of organic-rich *** biological debris is therefore deposited on continental margins when a continent drifts across the tropic *** creates favorable conditions for future hydrocarbon and reservoir *** subduction of organic-rich sediments during the closure of the Tethyan oceans results in the generation of mafic arc magmas with low oxygen *** chemical environment helps the mineralization of reduced-type ore deposits such as tungsten,tin,and ***-driven plate tectonics in the Tethys realm changes the distribution of oceans and landmass,subsequently affecting the balance and distribution of solar energy across Earth's *** changes trigger consequential environmental shif

关键词： Tethyan geodynamics Earth system Change of sea-land distribution Reduced ore deposit Hydrocarbon

Modulating sparks in a pulse train for repetitive and energy efficient plasma generation

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High Voltage 2023年第6期8卷 1168-1179页

作者： bo Yin Yifei Zhu Yun wu Institute of Aero‐Engine School of Mechanical EngineeringXi'an Jiaotong UniversityXi'anChina School of Electrical Engineering Xi'an Jiaotong UniversityXi'anChina Science and Technology of Plasma Dynamics Laboratory Airforce Engineering UniversityXi'anChina

Spark is a widely studied plasma source for active species production;however,it ex-periences unstable transitions(*** a thermal arc)at high frequencies or long pulse *** this study,the sparks generated in a pulse train were studied and modulated based on a physics‐corrected deep learning *** results show that a highly repeatable and stable spark plasma source can be achieved by automatically adjusting the voltage amplitude according to the discharge frequency in a high‐frequency pulse train within the time scale of the fluid *** influences of the electron number density increasing mode and modulated driven voltage profiles on the energy efficiencies were also studied.

关键词： Spark pulse energy

The Generalized f(R) Model with Coupling in 5D Spacetime

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Chinese Physics Letters 2013年第6期30卷 241-245页

作者： wu ya-bo ZHAO Yue-Yue LU Jian-bo LI Jian ZHANG Wen-Xin CHANG Hong Department of Physics Liaoning Normal UniversityDalian 116029

The generalized f(R)gravity with coupling in five-dimensional(5D)spacetime is studied on the basis of both the 4D generalized f(R)gravity with coupling and the pure f(R)gravity without coupling in 5D ***,by assuming a hypersurface-orthogonal space-like Killing vector field in 5D spacetime,the generalization of the 4D generalized f(R)gravity to 5D can be realized,which can give the reduced 4-metric coupled with two scalar *** particular,we discuss a special class of models,i.e.,f_(1)(R)=f_(2)(R)=αRm(m≠1),and choose B(L_(m))=Lm=-ρin the homogeneous and isotropic cosmology with the 4D Friedmann–Robertson–Walker *** numerical analysis shows that the parameter m can be constrained by means of the current observations for the deceleration parameter,which implies that this generalized f(R)model with coupling in 5D spacetime can account for the present accelerated expansion of the universe.

关键词： (R) coupling parameter

A state-of-the-art review on low-frequency nonlinear vibration isolation with electromagnetic mechanisms

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Applied Mathematics and Mechanics(English Edition) 2022年第7期43卷 1045-1062页

作者： bo yaN Ning YU Chuanyu wu School of Mechanical Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China

Vibration isolation is one of the most efficient approaches to protecting host structures from harmful vibrations,especially in aerospace,mechanical,and architectural engineering,*** linear vibration isolation is hard to meet the requirements of the loading capacity and isolation band simultaneously,which limits further engineering application,especially in the low-frequency *** recent twenty years,the nonlinear vibration isolation technology has been widely investigated to broaden the vibration isolation band by exploiting beneficial *** of the most widely studied objects is the"three-spring"configured quasi-zero-stiffness(QZS)vibration isolator,which can realize the negative stiffness and high-static-low-dynamic stiffness(HSLDS)*** nonlinear vibration isolation with QZS can overcome the drawbacks of the linear one to achieve a better broadband vibration isolation *** to the characteristics of fast response,strong stroke,nonlinearities,easy control,and low-cost,the nonlinear vibration with electromagnetic mechanisms has attracted *** this review,we focus on the basic theory,design methodology,nonlinear damping mechanism,and active control of electromagnetic QZS vibration ***,we provide perspectives for further studies with electromagnetic devices to realize high-efficiency vibration isolation.

关键词： quasi-zero-stiffness(QZS) nonlinear vibration isolation low-frequency electromagnetic vibration isolation bistable