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Dwarfi ng apple rootstock responses to elevated temperatures: A study on plant physiological features and transcription level of related genes

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Journal of Integrative Agriculture 2016年第5期15卷 1025-1033页

作者： ZHOU Bei-bei SUN Jian LIU Song-zhong jin Wan-mei ZHANG Qiang WEI qin-ping Institute of Forestry & Pomology Beijing Academy of Agriculture & Forestry Sciences/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (North China) Ministry of Agriculture

The aim of this study was to investigate the impact of heat stress on physiological features, together with endogenous hormones and the transcription level of related genes, to estimate the heat resistance ability and stress injury mechanism of different dwarfing apple rootstocks. Among the six rootstocks, the rootstocks of native Shao series（SH series） showed better heat stress resistance than those of Budagovski 9（B9）, Cornell-Geneva 24（CG24）, and Malling 26（M26） from abroad. Among SH series rootstocks, SH1 and SH6 showed higher heat stress resistance than SH40. M26 demonstrated the lowest adaption ability to heat stress, showing higher leaf conductivity and lower liquid water content（LWC） with the increase in temperature. Heat stress also resulted in the suppression of photosynthesis, which showed no significant restoration after 7-day recovery. It should be noted that although a higher temperature led to a lower LWC and photosynthetic efficiency（P_n） of CG24, there was no significant increase in leaf conductivity, and 7 days after the treatment, the P_n of CG24 recovered. The extremely high temperature tolerance of SH series rootstocks could be related to the greater osmotic adjustment（OA）, which was reflected by smaller reductions in leaf relative water content（RWC） and higher turgor potentials and leaf gas exchange compared with the other rootstocks. Determination of hormones indicated multivariate regulation, and it is presumed that a relatively stable expression levels of functional genes under high-temperature stress is necessary for heat stress resistance of rootstocks.

关键词： dwarfing apple rootstock SH series rootstocks heat stress physiological features

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Receding horizon H_∞ control for constrained time-delay systems

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Journal of Systems Engineering and Electronics 2009年第2期20卷 363-370页

作者： Lu mei jin Chengbo Shao Huihe Inst. of Automation Shanghai Jiaotong Univ. Shanghai 200240 P. R. China Dept. of Fieldbus Shanghai Automation Instrument Co. Ltd. Shanghai 200233 P. R. China Dept. of Product Design Shanghai Gaoke Valve Manufactory Co. Ltd. Shanghai 200092 P. R. China

A receding horizon Hoo control algorithm is presented for linear discrete time-delay system in the presence of constrained input and disturbances. Disturbance attenuation level is optimized at each time instant, and the receding optimization problem includes several linear matrix inequality constraints. When the convex hull is applied to denote the saturating input, the algorithm has better performance. The numerical example can verify this result.

关键词： receding horizon control Hoo control time-delay constrained input

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Rational construction of a cellular memory inverter

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Science China(Information Sciences) 2015年第1期58卷 99-106页

作者： CHEN mei ZHANG Lu XU jin School of Information Engineering Minzu University of China Institute of Software School of Electronics Engineering and Computer ScienceKey Laboratory for High Confidence Software Technologies of Ministry of EducationPeking University

Robust and reliable biological memory computing systems are lacking, although many biological computing systems are implemented. We successfully designed, constructed, and tested a cellular memory inverter in the bacterium Escherichia coli in a predictable way. We selected isopropyl-D-1-thiogalactopyranoside(IPTG) as the input and green fluorescent protein(GFP) as the output. We selected negative regulation of lac operon and excision function of Cre recombinase as computing tools. The GFP can express and produce output without IPTG. The input, IPTG, can induce the expression of Cre recombinase. The Cre recombinase can excise the GFP gene between site lox71 and site lox66, and hence turn off the output. We also selected ordinary differential equations(ODEs) to predict the dynamic behaviors for the precise design and implementation of the inverter. We used sodium dodecyl sulfate polyacrylamide gel electrophoresis(SDS-PAGE), colony Polymerase Chain Reaction(PCR), and fluorescent quantitative analysis techniques to verify the function of our *** study provides a new biological memory computing system. The Cre recombinase functions used here should be useful in the construction of biological memory computing systems.

关键词： cellular memory inverter lac operon cre recombinase ordinary differential equation(ODE) biological computing system

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Modeling and Analysis of Matthew Effect Under Switching Social Networks via Distributed Competition

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IEEE/CAA Journal of Automatica Sinica 2022年第7期9卷 1311-1314页

作者： mei Liu Suibing Li Long jin School of Information Science and Engineering Lanzhou UniversityLanzhou 730000 State Key Laboratory of Tibetan Intelligent Information Processing and Application Xining 810016China IEEE

Dear editor,This letter models and analyzes the Matthew effect under switching social networks via distributed competition.A competitive strategy is leveraged to trace the evolution of individuals in social systems under the Matthew *** addition,a consensus filter is utilized to decentralize the model with undirected graphs used to describe the interactions among individuals in social ***,a term is added to the dynamic consensus filter to compensate for the influence of the switching of communication networks on the *** this letter,the convergence of the proposed Matthew effect model is theoretically proved,and simulative experiments are conducted to verify the availability of the *** particular,this letter points out the state and evolution of each individual in social systems with distributed competition,and the influence of the social environment on the development of individuals is also intuitively displayed.

关键词： effect. letter intuitive

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Isolation, Crystal Structure and Cytotoxic Activity of Natural Maistemonine and Comparison with the Synthetic Compound

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Chinese Journal of Structural Chemistry 2020年第7期39卷 1277-1282页

作者： WU Yia YE qing-mei qin Shu-qin JIANG Ren-Wang Zhongshan Torch Polytechnic Zhongshan 528436China Department of Pharmacy Hainan General HospitalHaikou 570311China Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of EducationJinan UniversityGuangzhou 510632China

The title compound maistemonine(1)was isolated from the total alkaloid fraction of the 95%ethanol extract of the roots of Stemona japonica,followed by preparative HPLC and recrystallization from a mixture of n-hexane and ethyl *** crystal structure of 1,C23H29NO)6,was determined by single-crystal X-ray diffraction *** crystal belongs to orthorhombic system,space group P212121 with a=8.5698(6),b=14.0460(11),c=17.8815(17)?,V=2152.4(3)?3,Z=4,Mr=415.47,Dc=1.282 g/cm3,λ=0.71079?,μ=0.092 cm^–1,F(000)=888,S=0.995,R=0.0535 and wR=0.1067.A total of 5136 unique reflections were collected,of which 3523 were observed(Ⅰ>2σ(Ⅰ)).The absolute configuration of 1 could be assigned by referring to the conserved configuration of the methyl groups at C(2).Compound 1 shows mild cytotoxic activity against the prostate cancer cells LNCaP and PC3 with the IC50 values of 29.4±2.3 and 46.6±3.1 mM,*** is noteworthy that the natural maistemonine(1)is different from the synthetic compound which was a racemic with the triclinic space group *** lactone rings E from the natural and synthetic 1 are almost perpendicular to each other when overlapping the remaining parts of the molecules.

关键词： maistemonine isolation crystal structure cytotoxic comparison synthesis

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New Families of Soliton and Periodic Solutions of Bose-Einstein Condensation in Linear Magnetic Field and Time-Dependent Laser Field

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Communications in Theoretical Physics 2005年第2X期44卷 209-212页

作者： mei Jian-qin ZHANG Hong-qing Department of Applied Mathematics Dalian University of Technology Dalian 116024 China

By using a new generally projective Riccati equation method and with the help of symbolic computation,we consider a nonlinear Gross-Pitaevskii equation with weak bias magnetic and time-dependent laser fields. As a res... 详细信息

关键词： Bose-Einstein condensation Gross-Pitaevskii equation soliton solution periodic solution

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Zr_(55)Al_(10)Ni_(5)Cu_(30)amorphous alloy film prepared by magnetron sputtering method

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Rare Metals 2021年第8期40卷 2237-2243页

作者： Dong-mei Mi Sheng-Li Zhu Yan-qin Liang Zhao-Yang Li Zhen-Duo Cui Xian-jin Yang Akihisa Inoue School of Materials Science and Engineering Tianjin UniversityTianjin300072China Tianjin Key Laboratory of Composite and Functional Materials Tianjin300072China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin300072China Department of Physics Kings Abudulaziz UniversityJeddah22254Saudi Arabia

In this work,amorphous Zr_(55)Al_(10)Ni_(5)Cu_(30)alloy thin film was prepared on D36 steel substrate by magnetron sputtering *** film was characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),atomic force microscopy(AFM),hardness tester and nano *** behavior of the film was investigated in 3.5%NaCl aqueous solutions by an electrochemical *** room temperature,the amorphous alloy film was formed completely after sputtering for 5 *** surface morphology of the amorphous alloy film was uniform and *** of the amorphous alloy film improved the microhardness and corrosion resistance of the D36 *** amorphous alloy film(prepared at room temperature for 5 h)exhibited good adhesion strength with the *** as-sputtered sample exhibited a crevice corrosion trend when the sputtering time was too short(1 h)or too long(10 h).

关键词： Magnetron sputtering Amorphous alloy Thin film Corrosion resistance Zr_(55)Al_(10)Ni_(5)Cu_(30)

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Robust exponential stability analysis of a larger class of discrete-time recurrent neural networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第12期8卷 1912-1920页

作者： ZHANG Jian-hai ZHANG Sen-lin LIU mei-qin Department of System Science ＆ Engineering School of Electrical Engineering Zhejiang University Hangzhou 310027 China

The robust exponential stability of a larger class of discrete-time recurrent neural networks (RNNs) is explored in this paper. A novel neural network model, named standard neural network model (SNNM), is introduced to provide a general framework for stability analysis of RNNs. Most of the existing RNNs can be transformed into SNNMs to be analyzed in a unified way. Applying Lyapunov stability theory method and S-Procedure technique, two useful criteria of robust exponential stability for the discrete-time SNNMs are derived. The conditions presented are formulated as linear matrix inequalities (LMIs) to be easily solved using existing efficient convex optimization techniques. An example is presented to demonstrate the transformation procedure and the effectiveness of the results.

关键词： Standard neural network model (SNNM) Robust exponential stability Recurrent neural networks (RNNs) Discrete-time Time-delay system Linear matrix inequality (LMI)

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Energy-efficient localization and target tracking via underwater mobile sensor networks

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Frontiers of Information Technology & Electronic Engineering 2018年第8期19卷 999-1012页

作者： Hua-yan CHEN mei-qin LIU Sen-lin ZHANG State Key Laboratory of Industrial Control Technology Zhejiang University College of Electrical Engineering Zhejiang University

Underwater mobile sensor networks(UMSNs) with free-floating sensors are more suitable for understanding the immense underwater environment. Target tracking, whose performance depends on sensor localization accuracy, is one of the broad applications of UMSNs. However, in UMSNs, sensors move with environmental forces,so their positions change continuously, which poses a challenge on the accuracy of sensor localization and target tracking. We propose a high-accuracy localization with mobility prediction(HLMP) algorithm to acquire relatively accurate sensor location estimates. The HLMP algorithm exploits sensor mobility characteristics and the multistep Levinson-Durbin algorithm to predict future positions. Furthermore, we present a simultaneous localization and target tracking(SLAT) algorithm to update sensor locations based on measurements during the process of target tracking. Simulation results demonstrate that the HLMP algorithm can improve localization accuracy significantly with low energy consumption and that the SLAT algorithm can further decrease the sensor localization error. In addition, results prove that a better localization accuracy will synchronously improve the target tracking performance.

关键词： Underwater mobile sensor networks Energy-efficient Sensor localization Target tracking

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Ubiquitination modification:critical regulation of IRF family stability and activity

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Science China(Life Sciences) 2021年第6期64卷 957-965页

作者： Bao-qin Liu jin jin Yi-yuan Li Key Laboratory for Developmental Genes and Human Disease Ministry of EducationInstitute of Life SciencesJiangsu Province High-Tech Key Laboratory for Bio-Medical ResearchSoutheast UniversityNanjing 210096China MOE Laboratory of Biosystem Homeostasis and Protection and Life Sciences InstituteZhejiang UniversityHangzhou 310058China Sir Run Run Shaw Hospital College of Medicine Zhejiang UniversityHangzhou 310016China

Interferon regulatory factors(IRFs)play pivotal and critical roles in innate and adaptive immune responses;thus,precise and stringent regulation of the stability and activation of IRFs in physiological processes is *** stability and activities of IRFs are directly or indirectly targeted by endogenous and exogenous proteins in an ubiquitin-dependent ***,few reviews have summarized how host E3 ligases/DUBs or viral proteins regulate IRF stability and ***,with recent technological developments,details about the ubiquitination of IRFs have been continuously *** knowledge of how these proteins function and interact with IRFs may facilitate a better understanding of the regulation of IRFs in immune responses or other biological processes,we summarized current studies on the direct ubiquitination of IRFs,with an emphasis on how these proteins interact with IRFs and affect their activities,which may provide exciting targets for drug development by regulating the functions of specific E3 ligases.

关键词： IRFs ubiquitination E3 ubiquitin ligase viral proteins activation degradation

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