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Integration of root architecture,root nitrogen metabolism,and photosynthesis of‘Hanfu’apple trees under the cross-talk between glucose and IAA

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Horticultural Plant Journal 2023年第4期9卷 631-644页

作者： Bianbin Qi xin Zhang Zhiquan Mao Sijun Qin Deguo lv College of Horticulture Shenyang Agricultural UniversityShenyangLiaoning 110866China College of Horticultural Science and Engineering Shandong Agricultural UniversityTaianShandong 271018China

Sugars and auxin have important effects on almost all phases of plant life cycle,which are so fundamental to plants and regulate similar ***,little is known about the effect of cross-talk between glucose and indole-3-acetic acid(IAA)on growth and development of apple *** examine the potential roles of glucose and IAA in root architecture,root nitrogen(N)metabolism and photosynthetic capacity in‘Hanfu’(Malus domestica),a total of five treatments was established:single application of glucose,IAA,and auxin polar transport inhibitor(2,3,5-triiodobenzoic acid,TIBA),combined application of glucose with TIBA and that of glucose with *** combined application of glucose with IAA improved root topology system and endogenous IAA content by altering the mRNA levels of several genes involved in root growth,auxin transport and ***,the increased N metabolism enzyme activities and levels of genes expression related to N in roots may suggest higher rates of transformation of nitrate(NO3--N)into amino acids application of glucose and ***,single application of TIBA decreased the expression levels of auxin transport gene,hindered root growth and decreased endogenous IAA *** combined with TIBA application effectively attenuated TIBA-induced reductions in root topology structure,photosynthesis and N metabolism activity,and mRNA expression levels involved in auxin biosynthesis and *** together,glucose application probably changes the expression level of auxin synthesis and transport genes,and induce the allocation of endogenous IAA in root,and thus improves root architecture and N metabolism of root in soil with deficit carbon.

关键词： Malus Cross-talk between glucose and IAA Root morphology Nitrogen metabolism Photosynthesis

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Is It Easy to Recognize Baby's Age and Gender?

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Journal of Computer Science & Technology 2021年第3期36卷 508-519页

作者： Yang Liu Ruili He Xiaoqian lv Wei Wang xin Sun Shengping Zhang School of Computer Science and Technology Harbin Institute of TechnologyWeihai 264209China

Face analysis tasks,e.g.,estimating gender or age from a face image,have been attracting increasing interest in recent ***,most existing studies focus mainly on analyzing an adult's face and ignore an interesting question:is it easy to estimate gender and age from a baby's face?In this paper,we explore this interesting *** first collect a new face image dataset for our research,named BabyFace,which contains 15528 images from 5872 babies younger than two years *** gender,each face image is annotated with age in months from 0 to *** addition,we propose new age estimation and gender recognition *** particular,based on SSR-Net backbone,we introduce the attention mechanism module to solve the age estimation problem on the BabyFace dataset,named *** the part of gender recognition,inspired by the age estimation method,we also use a two-stream structure,named Two-Steam SE-block with Augment(TSSEAug).We extensively evaluate the performance of the proposed methods against the state-of-the-art methods on *** age estimation model achieves very appealing performance with an estimation error of less than two *** proposed gender recognition method obtains the best accuracy among all compared *** the best of our knowledge,we are the first to study age estimation and gender recognition from a baby's face image,which is complementary to existing adult gender and age estimation methods and can shed some light on exploring baby face analysis.

关键词： age estimation gender recognition baby face convolutional neural network(CNN) attention mechanism

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From nanoparticles to single atoms for Pt/CeO2:Synthetic strategies,characterizations and applications

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Journal of Rare Earths 2020年第8期38卷 850-862,I0002页

作者： Ying xin Nana Zhang Yanan lv Jin Wang Qian Li Zhaoliang Zhang Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials School of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China

Pt/CeO2 catalysts with unitary Pt species,nanoparticles,clusters or single atoms,often exhibit excellent activity and unique selectivity in many catalytic reactions benefiting from their small size,abundant unsaturated active sites,and unique electro nic *** recent years,a tre mendous number of related articles have provided great inspiration to future research and development of Pt/CeO2 *** this review,the state-of-the-art evolution of Pt nanoparticles to Pt single atoms on CeO2 is reviewed with the emphasis on synthetic strategies,advanced characterization techniques(allowing one to clarify the single atoms from clusters),the catalytic applications and mechanisms from the viewpoint of theoretical ***,the critical outlooks and the challenges faced in developing the single-atom Pt/CeO2 catalysts are highlighted.

关键词： Pt/CeO2 Single atoms Cluster Synthetic strategy Characterization Application

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A new high-pressure die casting Mg-Gd-Sm-Al alloy with high strength-ductility synergy

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Journal of Rare Earths 2024年第12期42卷 2239-2248,I0002页

作者： Shuhui lv youwei Cheng Bo Deng Tao Xu xin Qiu Qiang Yang School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun130022China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China Kashui International Holdings Limited Shenzhen518111China

A high-pressure die casting(HPDC)Mg-5Gd-1.5Sm-0.7Al alloy was newly developed and exhibits outstanding strength-ductility synergy,with the yield strength and the tensile elongation to fracture being approximately 200 MPa and 8.5%,*** alloy has two types of a-Mg grains:coarse a_(1)-Mg((46±18)μm)and fine a_(2)-Mg((9.2±2.3)μm)grains,and various Al-GS(GS=Gd and Sm)particles located at grain boundaries while clear solute-atom segregation near grain boundaries with limited or free intermetallic *** using Cs-corrected high-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM)indicate the crystal structures of Al-GS *** aging,denseβ'precipitates and chain-shapedβ''-like structures precipitated near grain boundaries while a high density of ultrafineβ''-(Mg,Al)3Sm precipitates and Al-GS clusters formed in grain *** fine grains,Al-GS primary particles,solute-atom segregation near grain boundaries,and/or multiple precipitates contribute to the high strength of the studied alloy,while the multi-scale a-Mg grains,variety of intermetallic particles but discontinuous skeleton,and the multi-typed precipitated lead to its satisfactory ductility.

关键词： Magnesium alloys Strength-ductility synergy Intermetallic phases Scanning/transmission electron microscopy (STEM)Precipitate Rare earths

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Leaf recognition using BP-RBF hybrid neural network

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Journal of Forestry Research 2022年第2期33卷 579-589页

作者： xin Yang Haiming Ni Jingkui Li Jialuo lv Hongbo Mu Dawei Qi College of Science Northeast Forestry UniversityHarbin 150040People’s Republic of China

Plant recognition has great potential in forestry research and management.A new method combined back propagation neural network and radial basis function neural network to identify tree species using a few features and *** process was carried out in three steps:image pretreatment,feature extraction,and leaf *** the image pretreatment processing,an image segmentation method based on hue,saturation and value color space and connected component labeling was presented,which can obtain the complete leaf image without veins and *** BP-RBF hybrid neural network was used to test the influence of shape and texture on species *** recognition accuracy of different classifiers was used to compare classification *** accuracy of the BP-RBF hybrid neural network using nine dimensional features was 96.2%,highest among all the classifiers.

关键词： Leaf recognition BP-RBF neural network Image processing Feature extraction Machine learning

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Aggregate Engineering in Supramolecular Polymers via Extensive Non-covalent Networks

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Chinese Journal of Polymer Science 2021年第10期39卷 1310-1318,I0007页

作者： xin Huang Dong lv Li-Qing Ai Shuk Han Cheng Xi Yao Department of Biomedical Sciences City University of Hong KongHong Kong 999077China City University of Hong Kong Shenzhen Research InstituteShenzhen 518075China

Aggregate engineering of non-covalent networks endows supramolecular polymers with thermo-mechanical versatility,stimuli-responsive phase transitions and intrinsic damage-healing ***,most non-covalent networks are vulnerable at elevated temperatures,which suppresses the robustness of supramolecular ***,ureidocytosine(UCy)motifs,which are capable of forming extensive non-covalent networks and thus robust molecular aggregates via multivalent hydrogen bonds and aromatic stackings,are proposed to enable precise programming of the thermo-mechanical *** simulations reveal that the enthalpic contributions from the UCy aggregates play dominant roles to compensate the entropic loss from the redistributions of polymeric spacers and stabilize the non-covalent networks over wide temperature *** aggregate-level strategy offers prospects for applications which require thermo-mechanical versatility of supramolecular polymers,such as 3D printing,microfabrication and damage-healing coating.

关键词： Aggregate engineering Damage-healing Extensive non-covalent network Ureidocytosine Supramolecular polymers

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Environmental hazards and comprehensive utilization of solid waste coal gangue

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Progress in Natural Science:Materials International 2024年第2期34卷 223-239页

作者： Qinwen Zheng Yi Zhou xin Liu Meng Liu Libing Liao Guocheng lv Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Material Sciences and Technology China University of Geosciences

Coal mining and washing is accompanied by the production of large amounts of coal gangue, which exerts a notable influence on the natural environment. However, as a form of solid waste, coal gangue exhibits a wide range of potential applications in the field of recycling. Nowadays, 'the utilization rate and quality of coal gangue are inadequate, and the disposal capacity and scale of coal gangue obviously cannot meet the current global lowcarbon environmental protection requirements. The paper presents an overview of the present state of coal gangue production and utilization, and investigates the environmental impact caused by the practice of stacking coal gangue. We emphasize the current research status of gangue in various high-value application fields,including environmental materials, agricultural production, construction materials, recovery and extraction of valuable elements, and energy generation. It highlights the significance of pre-treatment methods like activation,modification, and innocuousness for the comprehensive utilization of gangue. Additionally, we briefly introduce and discusses the future directions of research and development in this area. Nevertheless, with regard to the environmental impact of secondary contamination and the efficiency of gangue utilization, there remain numerous obstacles and unresolved matters that merit further investigation. It is believed that this review can offer valuable insights into the utilization of gangue development methods, and expedite the successful implementation and practical application of large-scale treatment and disposal of solid waste.

关键词： Coal gangue Comprehensive utilization Environmental effect Mineral material Solid waste recycling

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High-pressure polymorphs of LiPN2： A first-principles study

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Frontiers of physics 2018年第5期13卷 147-152页

作者： Jian lv xin Yang Dan Xu Yu-xin Huang Hong-Bo Wang Hui Wang College of Materials Science and Engineering Jilin University Changchun 130012 China State Key Lab of Superhard Materials College of Physics Jilin University Changchun 130012 China College of Basic Science Changchun University of Technology Changchun 130012 China

In this work, high-pressure phase behavior of LiPN2 within 0-300 GPa was studied by using an unbiased structure searching method in combination with first-principles calculations. Three pressure- induced phase transitions were predicted, as tI16 →hR4 →cF64 → oP8 at 44, 136, and 259 GPa, respectively. The six-fold coordination environments were found for all high-pressure polymorphs, which are substantially different from the four-fold coordination environments observed in the tI16 structure. The hR4 and cF64 structures consist of close-packed PN6 and LiN6 octahedra connected by edge-sharing, whereas the oP8 structure is built up from edge- and face-sharing PN6 and LiN6 octahedra with N lying in the center of the trigonal prisms. The electronic structure analysis reveals that LiPN2 is a semiconductor within the pressure range studied and P-N and Li-N bonds are covalent and ionic, respectively. The results obtained are expected to provide insight and guidance for future experiments on LiPN2 and other alkali metal nitridophosphates.

关键词： lithium nitridophosphates phase transition high pressure first principles

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CO hydrogenation combined with water-gas-shift reaction for synthetic natural gas production:a thermodynamic and experimental study

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International Journal of Coal Science & Technology 2018年第4期5卷 439-451页

作者： Fanhui Meng xin Li Xiaoyang lv Zhong Li Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province Institute of Coal Chemical EngineeringTaiyuan University of TechnologyNo.79 West Yingze StreetTaiyuan 030024ShanxiChina

The hydrogenation of CO to synthetic natural gas (SNG) needs a high molar ratio of H2/CO (usually large than 3.0 in industry), which consumes a large abundant of hydrogen. The reverse dry reforming reaction (RDR, 2H2 + 2CO←→CH4 + CO2), combining CO methanation with water-gas-shift reaction, can significantly decrease the H2/CO molar ratio to 1 for SNG production. A detailed thermodynamic analysis of RDR reaction was carried out based on the Gibbs free energy minimization method. The effect of temperature, pressure. H2/CO ratio and the addition of H2O, CH4, CO2, O2 and C2H4 into the feed gas on CO conversion, CH4 and CO2 selectivity, as well as CH4 and carbon yield, are discussed. Experimental results obtained on homemade impregnated Ni/Al2O3 catalyst are compared with the calculations. The results demonstrate that low temperature (200-500 °C), high pressure (1-5 MPa) and high H2/CO ratio (at least 1) promote CO conversion and CH4 selectivity and decrease carbon yield. Steam and CO2 in the feed gas decrease the CH4 selectivity and carb on yield, and enhance the CO2 con tent. Extra CH4 elevates the CH4 content in the products, but leads to more carbon formation at high temperatures. O2 significantly decreases the CH4 selectivity and C2H4 results in the generation of carbon.

关键词： Synthetic natural gas Reverse dry reforming of methane Gibbs free energy minimization Experimental study CO conversion

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L2-LBMT:A Layered Load Balance Routing Protocol for Underwater Multimedia Data Transmission

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Journal of Ocean University of China 2017年第6期16卷 1018-1026页

作者： lv Ze TANG Ruichun TAO Ye SUN xin XU Xiaowei College of Information Science and Engineering Ocean University of China Department of Information Technology Qingdao University of Science and Technology

Providing highly efficient underwater transmission of mass multimedia data is challenging due to the particularities of the underwater environment. Although there are many schemes proposed to optimize the underwater acoustic network communication protocols, from physical layer, data link layer, network layer to transport layer, the existing routing protocols for underwater wireless sensor network(UWSN) still cannot well deal with the problems in transmitting multimedia data because of the difficulties involved in high energy consumption, low transmission reliability or high transmission delay. It prevents us from applying underwater multimedia data to real-time monitoring of marine environment in practical application, especially in emergency search, rescue operation and military field. Therefore, the inefficient transmission of marine multimedia data has become a serious problem that needs to be solved urgently. In this paper, A Layered Load Balance Routing Protocol(L2-LBMT) is proposed for underwater multimedia data transmission. In L2-LBMT, we use layered and load-balance Ad Hoc Network to transmit data, and adopt segmented data reliable transfer(SDRT) protocol to improve the data transport reliability. And a 3-node variant of tornado(3-VT) code is also combined with the Ad Hoc Network to transmit little emergency data more quickly. The simulation results show that the proposed protocol can balance energy consumption of each node, effectively prolong the network lifetime and reduce transmission delay of marine multimedia data.

关键词： underwater wireless multicast multimedia data transmission load balance

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