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Ectopic Expression of the Pttknl Gene Induces Alterations in the Morphology of the Leaves and Flowers in Petunia hybrida Vilm.

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Journal of Integrative Plant Biology 2005年第10期47卷 1153-1158页

作者： Xin HU Qing-feng WU Ya-Hong XIE Hong ru feng XIE Xin-Yu wang Chong-Ying WAN School of Life Sciences Lanzhou University Lanzhou 730000 China Xi＇an Institute of Gardens Xi＇an 710065 China

A novel knottedl-like homeobox （knox） gene, Pttknl （Populus tremulaxtremuloides knottedl）, isolated from the cambial region of hybrid aspen, was introduced into Petunia hybrida Vilm. using the leafdisc method mediated by Agrobacterium. A series of novel phenotypes was observed in transgenic petunia plants, including the formation of ectopic spikes on the adaxial surface of corollas and small petals on the abaxial surface of corollas, fusion of floral organs, shortening of corolla midribs, the formation of tumor-like knots along the midrib on the abaxial surface and serrated lobs of corolla margins, and alterations in petal color; except for changes in the leaves and plant architecture, RT-PCR showed that the Pttknl gene was expressed in the leaves of different petunia transgenic plants, whereas no signal was detected in wild-type plants. The possible function of Pttknl in leaf and flower development is discussed.

关键词： ectopic expression knox gene novel phenotypes Petunia hybrida Pttknl gene RT-PCR.

Underground Pipeline Surveillance with an Algorithm Based on Statistical Time-Frequency Acoustic Features

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Tsinghua Science and Technology 2022年第2期27卷 358-371页

作者： Tianlei wang Jiuwen Cao ru Xu Jianzhong wang the Artificial Intelligence Institute and also with the Key Lab for IoT and Information Fusion Technology of ZhejiangHangzhou Dianzi UniversityHangzhou 310018China Zhejiang Sanhua Automotive Components Co.Ltd. Hangzhou 310008China

Underground pipeline networks suffer from severe damage by earth-moving devices due to rapid ***,designing a round-the-clock intelligent surveillance system has become crucial and *** this study,we develop an acoustic signal-based excavation device recognition system for underground pipeline *** front-end hardware system is equipped with an acoustic sensor array,an Analog-to-Digital Converter(ADC)module(ADS1274),and an industrial processor Advanced RISC Machine(ARM)cortex-A8 for signal collection and algorithm ***,a novel Statistical Time-Frequency acoustic Feature(STFF)is proposed,and a fast Extreme Learning Machine(ELM)is adopted as the *** on real recorded data show that the proposed STFF achieves better discriminative capability than the conventional acoustic cepstrum *** addition,the surveillance platform is applicable for encountering big data owing to the fast learning speed of ELM.

关键词： underground pipeline surveillance time-frequency feature excavation device recognition Extreme Learning Machine(ELM)

Effect of Thermomechanical Controlled Processing Parameters on Microstructure and Properties of Q460q Steel

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Journal of Iron and Steel Research International 2010年第1期17卷 38-43页

作者： wang Lei GAO Cai-ru wang Yan-feng JIN Wen-zhong ZHAO De-wen LIU Xiang-hua State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China Shougang Research Institute of Technology Beijing 100041 China Shanghai Shenhua AcousticsEquipment Co Ltd Shanghai 201709 China

With tensile test, impact test, and optical microscopy, the effect of thermomechanical controlled processing （TMCP） parameters on the microstructure and properties of Q460 steel was studied and analyzed. The TMCP parameters for Q460q steel were optimized by laboratory experiments, and then, industrial trial was carried out. The result indicated that the microstructure and properties of the Q460q steel in industrial trial were in agreement with the results obtained in laboratory experiments and could meet the national standard of Q460q steel.

关键词： TMCP mechanical property M/A constituent Q460q steel

Characterization of a Novel Plantain Asr Gene,MpAsr,that is Regulated in Response to Infection of Fusarium oxysporum f. sp. cubense and Abiotic Stresses

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Journal of Integrative Plant Biology 2010年第3期52卷 315-323页

作者： Hai-Yan Liu Jin-Ran Dai Dong-ru feng Bing Liu Hong-Bin wang Jin-Fa wang The State Key Laboratory of Biocontrol and The Key Laborat-ory of Gene Engineering of Ministry of Education School of Life Sciences Sun Yat-sen University Guangzhou 510275 China

Asr （abscisic acid, stress, ripening induced） genes are typically upregulated by a wide range of factors, including drought, cold, salt, abscisic acid （ABA） and injury; in addition to plant responses to developmental and environmental signals. We isolated an Asr gene, MpAsr, from a suppression subtractive hybridization （SSH） cDNA library of cold induced plantain （Musa paradisiaca） leaves. MpAsr expression was upregulated in Fusarium oxysporum f. sp. cubense infected plantain leaves, peels and roots, suggesting that MpAsr plays a role in plantain pathogen response. In addition, a 581-bp putative promoter region of MpAsr was isolated via genome walking and cis-elements involved in abioUc stress and pathogen-related responses were detected in this same region. Furthermore, the MpAsr promoter demonstrated positive activity and inducibility in tobacco under F. oxysporum f. sp. cubense infection and ABA, cold, dehydration and high salt concentration treatments. Interestingly, transgenic Arabidopsis plants overexpressing MpAsr exhibited higher drought tolerance, but showed no significant decreased sensitivity to F. oxysporum f. sp. cubense. These results suggest that MpAsr might be involved in plant responses to both abiotic stress and pathogen attack.

关键词： ABSCISIC acid AQUIFER storage recovery FUSARIUM oxysporum GENE expression TOBACCO PATHOGENIC microorganisms

Hydrothermal Synthesis of H_3PW_(12)O_(40)/TiO_2 Nanometer Photocatalyst and Its Catalytic Performance for Methyl Orange

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Chemical Research in Chinese Universities 2012年第3期28卷 366-370页

作者： feng Chang-gen SHANG Hai-ru State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081P.R.China

H3PW12O40/TiO2 nanometer photocatalyst was prepared by one step hydrothermal synthesis from H3PW12O40·nH20 and Ti（OBu）4, simultaneously realizing the load and modification of H3PW12O40. The catalyst was characterized by Fourier transform infrared spectroscopy（FTIR）, powder X-ray diffraction（XRD）, nitrogen adsorp- tion-desorption analysis and scanning electron microscopy（SEM）. The results show that the catalyst is Keggin struc- ture and crystallized in anatase structure, the diameter and specific area of the prepared catalyst are 3.8 nm and 177.9 m^2/g, respectively, and its dispersity is better. The photocatalytic properties were compared for TiO2H3PW12O40/TiO2 prepared by impregnation and H3PW12O40/TiO2 prepared by hydrothermal method with methyl orange as a probe. The effects of H3PW12O40 loadings, crystallization method, initial pH and concentration of dye solution on the degradation of methyl orange were investigated.

关键词： H3PWt2O40/TiO2 Hydrothermal synthesis Photocatalytic performance Degradation Methyl orange

Systemic regulation of photosynthetic function in maize plants at graining stage under a vertically heterogeneous light environment

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Journal of Integrative Agriculture 2022年第3期21卷 666-676页

作者： WU Han-yu QIAO Mei-yu ZHANG wang-feng wang Ke-ru LI Shao-kun JIANG Chuang-dao Key Laboratory of Plant Resources Institute of BotanyChinese Academy of SciencesBeijing 100093P.R.China Key Laboratory of Oasis Eco-Agriculture Xinjiang Production and Construction Corps/College of AgronomyShihezi UniversityShihezi 832003P.R.China Institute of Crop Sciences Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and EcologyMinistry of Agriculture and Rural AffairsBeijing 100081P.R.China

To cope with a highly heterogeneous light environment,photosynthesis in plants can be regulated ***,the majority of studies are carried out with various plants during the vegetative growth *** the reproductive sink improves photosynthesis,we wondered how photosynthesis is systemically regulated at the reproductive stage under a vertically heterogeneous light environment in the ***,changes of light intensity within canopy,chlorophyll content,gas exchange,and chlorophyll a fluorescence transient were carefully investigated at the graining stage of maize under various planting *** this study,a high planting density of maize drastically reduced the light intensities in the lower canopy,and increased the difference in vertical light distribution within the *** the increase of vertical heterogeneity,chlorophyll content,light-saturated photosynthetic rate and the quantum yield of electron transport in the ear leaf(EL) and the fourth leaf below the ear(FLBE) were decreased gradually,and the ranges of declines in these parameters were larger at FLBE than those at *** in the lower canopy were shaded artificially to further test these *** shading(PS) resulted in a vertically heterogeneous light environment and enhanced the differences in photosynthetic characteristics between EL and *** the tassel and top leaves(RTL) not only improved the vertical light distribution within the canopy,but also reduced the differences in photosynthetic characteristics between the two *** together,these results demonstrated that maize plants could enhance the vertical heterogeneity of their photosynthetic function to adapt to their light environment;slight changes of the photosynthetic function in EL at the graining stage under a vertically heterogeneous light environment indicated that the systemic regulation of photosynthesis is weak at the graining stage.

关键词： light environment photosynthesis gas exchange chlorophyll a fluorescence transient reproductive growth

Photoinduced radical sulfur dioxide insertion with asymmetric cyclization of alkenes: accessing β-chiral sulfones bearing S-stereocentric cyclic sulfinamides

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Science China Chemistry 2025年第01期 257-263页

作者： Jiapian Huang Chenxin wang Xu wang Xiaoyu Zhou Wei Xiao Jie Wu School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies Taizhou University State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences School of Chemistry and Chemical Engineering Henan Normal University

The generation of various β-chiral sulfones bearing chiral cyclic sulfinamides through photoredox-catalyzed sulfur dioxide insertion with asymmetric radical cyclization is described. This method features a broad substrate scope and excellent stereospecificity. Computational studies reveal that the dispersion interaction between sulfinyl group and CH2SO2Ph group plays a crucial role in the stereoselectivity control.

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Analysis on MAV/UAV cooperative combat based on complex network

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Defence Technology（防务技术） 2020年第1期16卷 150-157页

作者： Jie-ru Fan Dong-guang Li ru-peng Li Yue wang Beijing Institute of Technology BeijingChina Beijing Electro-mechanical Engineering Institute BeijingChina Beijing Institute of Electronic System Engineering BeijingChina

A formation model of manned/unmanned aerial vehicle(MAV/UAV) collaborative combat can qualitatively and quantitatively analyze the synergistic ***,there is currently no effective and appropriate model construction method or theory,and research in the field of collaborative capability evaluation is basically *** to the actual conditions of cooperative operations,a new MAV/UAV collaborative combat network model construction method based on a complex network is *** analyzing the characteristic parameters of the abstract network,the index system and complex network are ***,a method for evaluating the synergistic effect of the cooperative combat network is *** method provides assistance for the verification and evaluation of MAV/UAV collaborative combat.

关键词： Complex network Stochastic network MAV/UAV collaborative combat Evaluation

Criteria for assessing carbon emissions peaks at provincial level in China

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Advances in Climate Change Research 2022年第1期13卷 131-137页

作者： Min wang Peng wang Liang WU ru-Pu YANG Xiang-Zhao feng Meng-Xue ZHAO Xiao-Lin DU Yu-Jia wang Department of Energy and Environmental Policy Research Policy Research Center for Environment and EconomyMinistry of Ecology and EnvironmentBeijing 100029China Research Center for Environmental&Ecology Strategic Planning and Regional Development Policy Research Center for Environment and Economy.Ministry of Ecology and EnvironmentBeijing 100029China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China College of Environment Science and Engineering Nankai UniversityTianjin 300350China

China has pledged to peak carbon emissions by 2030 and neutralize emissions by *** is an urgent need to develop a comprehensive and reliable methodology to judge whether a region has reached its carbon emissions peak(CEP),as well as to schedule and prioritize mitigation activities for different *** this study,we developed an approach for identifying the CEP status of 30 provincial areas in China,considering both the carbon emissions trends and the main socioeconomic factors that influence these *** to the results of the Mann-Kendall(MK)tests,changes in carbon emissions for the 30 provincial areas can be grouped inlo four clusters:those with significant reductions,marginal reductions,marginal increases,and significant ***,total energy consumption(TEC),the proportion of coal consumption(PCC),the proportion of the urban population(PUP),the proportion of secondary industry(PASP),and per capita GDP(PGDP)were further identified as the main factors influencing carbon emissions,by applying Redundancy analysis(RDA)and Monte Carlo permutation *** balance efficacy with fairness,we assigned scores from 1 to 4 to trends in carbon emissions,and the Group Analysis results of the main influencing factors above except for TEC;for TEC,main basis is the relevant assessment *** finally,according to the actual condition of total scores,provincial areas were assigned to the first,second,third and fourth stage of progress toward CEP,using the method of Natural Breaks(Jenks).Based on the method,differentiated plans should be adopted from the perspective of fair development and emissions reduction efficiency,in accordance with the basic principles of Doing the Best within Capacity and Common but Differentiated *** classification method can also be adopted by other developing countries which have not yet achieved CEP.

关键词： Carbon emission peak(CEP) Influencing factors Determination methods Stage classification Provincial level