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Journal of Iron and Steel Research International 2018年第7期25卷 700-705页

作者： Si-wei Wu xiao-guang Zhou Jia-kuang Ren guang-ming cao Zhen-yu Liu Nai-an Shi State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110819 Liaoning China Continuous Rolling Plant of No. 3 Steelmaking of Angang Co. Ltd. Anshan 114021 Liaoning China

A successful mechanical property data-driven prediction model is the core of the optimal design of hot rolling process for hot-rolled strips. However, the original industrial data, usually unbalanced, are inevitably mixed with fluctuant and abnormal values. Models established on the basis of the data without data processing can cause misleading results, which cannot be used for the optimal design of hot rolling process. Thus, a method of industrial data processing of C-Mn steel was proposed based on the data analysis. The Bayesian neural network was employed to establish the reliable mechanical property prediction models for the optimal design of hot rolling process. By using the multi-objective optimization algorithm and considering the individual requirements of costumers and the constraints of the equipment, the optimal design of hot rolling process was successfully applied to the rolling process design for Q345B steel with 0.017% Nb and 0.046% Ti content removed. The optimal process design results were in good agreement with the industrial trials results, which verify the effectiveness of the optimal design of hot rolling process.

关键词： Industrial data Data processing - Mechanical property Optimal design Hot rolling process C-Mn steel

Formation of the Fertilization Pore during Oogenesis of the Fern Ceratopteris thalictroides

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Journal of Integrative Plant Biology 2010年第6期52卷 518-527页

作者： Jian-Guo cao Quan-xi Wang Wen-Mei Bao College of Life and Environment Sciences Shanghai Normal University Shanghai 200234 China

The development of the fertilization pore during oogenesis of the fern Ceratopteris thalictroides was followed using transmission electron microscopy. The newly formed egg is appressed closely to the adjacent cells. There are well-developed plasmodesmata between the egg and the ventral canal cell, but none between the egg and the jacket cells of the archegonium. During maturation, a separation cavity is formed around the egg. However, a pore region persistently connects the egg and the ventral canal cell. The extra egg membrane is formed by deposition of sheets of endoplasmic reticulum （ER）, but no ER is deposited on the inner surface of the pore region. Thus, a fertilization pore, covered by a layer of plasmalemma, is formed. The ventral canal cell undoubtedly participates the formation of the fertilization pore, probably by absorbing the sheets of ER beneath the pore region. The functional significance of the ventral canal cell in formation of the fertilization pore is discussed. The features of the mature egg include that abundant concentric membranes and osmiophilic vesicles occur in the cytoplasm of the mature egg. The initial, round nucleus of the egg eventually becomes cup-shaped. This investigation gives some new insights about the cells participating oogenesis in ferns.

关键词： FERTILIZATION of plants OOGENESIS CERATOPTERIS thalictroides TRANSMISSION electron microscopy PLASMODESMATA ENDOPLASMIC reticulum CELL membranes CELL interaction (Biology)

Effect of volume fraction and mechanical stability of austenite on ductility of medium Mn steel

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Journal of Iron and Steel Research International 2019年第11期26卷 1209-1218页

作者： Si-lian Che Zhao-xi cao Chang Wang Chong-xiang Huang Dirk Ponge Wen-quan cao Central Iron and Steel Research Institute(CISRI) Beijing 100081China Science Faculty University of SydneySydney NSW 2006Australia School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065SichuanChina Max-Planck-Institute for Iron Research Duesseldorf 40237Germany

A hot-rolled medium Mn(0.2C5Mn)steel is annealed at 650℃ to produce an ultrafine-grained duplex microstructure with different austenite volume fractions by austenite reverted transformation(ART)annealing,and the orientation relationship strictly obeys K-S orientation relationship before *** tests are carried out in a temperature range from-196 to 400℃ to examine the effects of the austenite volume fraction and the deformation temperature on the tensile properties and the austenite *** observations reveal that the metastable austenite gradually transformed into a-martensite,which is controlled by the deformation strain,the temperature and the austenite volume *** strain hardening behavior and ductility of the studied steel are dependent on austenite volume fraction and deformation temperature *** stress-strain curves of ART-annealed 0.2C5Mn steel assume an S shape and a very large work hardening rate of about 10 GPa is obtained at liquid nitrogen deformation *** on the experimental data,a quantitative relation is proposed to describe the ductility dependence on both the austenite volume fraction and its mechanical stability.

关键词： TRIP effect Ductility Phase transformation Austenite volume fraction Mechanical stability

Ultrastructure of the Mature Egg and Fertilization in the Fern Ceratopteris thalictroides

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Journal of Integrative Plant Biology 2009年第3期51卷 243-250页

作者： Jian-Guo cao Nai-Ying Yang Quan-xi Wang College of Life and Environment Sciences Shanghai Normal University Shanghai 200234 China

The ultrastructure of the mature egg and fertilization in the fern Ceratopteris thafictroides （L.） Brongn. were observed by transmission electron microscopy. The results revealed that the mature egg possesses an obvious egg membrane at the periphery of the egg. Furthermore, a fertilization pore was identified in the upper egg membrane of the mature egg. The structure of the pore is described for the first time. The fertilization experiment indicated that spermatozoids crowd into the cavity above the egg through the neck canal of the archegonium; however, only one of these can penetrate into the egg through the fertilization pore. Immediately on penetration of the spermatozoid, the egg begins to shrink. The volume of the fertilized egg decreases to almost one-half that of the unfertilized egg. As a result, the protoplasm of the fertilized egg becomes dense and opaque, which may lead to a situation where the organelles of both the egg and the fertilizing spermatozoid become indistinguishable. Simultaneously, abundant vesicles containing concentric membranes or opaque materials appear near the fertilization pore in the cytoplasm of the fertilized egg. These vesicles are considered to act as a barrier that prevents polyspermy. The present study provides a new insight into the ultrastructure of the mature egg and the cytological mechanism of fertilization in ferns.

关键词： Ceratopteris thalictroides fern fertilization fertilization pore.

The possible KK^(*)and D^(*)bound and resonance states by solving the Schrodinger equation

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Communications in Theoretical Physics 2024年第10期76卷 85-91页

作者： Bao-xi Sun Qin-Qin cao Ying-Tai Sun School of Physics and Optoelectronic Engineering Beijing University of TechnologyBeijing 100124China School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China

The Schrodinger equation with a Yukawa type of potential is solved *** different boundary conditions are taken into account,a series of solutions are indicated as a Bessel function,the first kind of Hankel function and the second kind of Hankel function,***,the scattering processes of K^(*)and D^(*)are *** the K^(*)sector,the f_(1)(1285)particle is treated as a K^(*)bound state,therefore,the coupling constant in the K^(*)Yukawa potential can be fixed according to the binding energy of the f_(1)(1285)***,a K^(*)resonance state is generated by solving the Schrodinger equation with the outgoing wave condition,which lies at 1417-i18 MeV on the complex energy *** is reasonable to assume that the K^(*)resonance state at 1417-i18 MeV might correspond to the f_(1)(1420)particle in the review of the Particle Data *** the D^(*)sector,since the X(3872)particle is almost located at the D^(*)threshold,its binding energy is approximately equal to ***,the coupling constant in the D^(*)Yukawa potential is determined,which is related to the first zero point of the zero-order Bessel *** to the K^(*)case,four resonance states are produced as solutions of the Schrodinger equation with the outgoing wave *** is assumed that the resonance states at 3885~i1 MeV,4029-i108 MeV,4328-i191 MeV and 4772-i267 MeV might be associated with the Zc(3900),the X(3940),theχ_(c1)(4274)andχ_(c1)(4685)particles,*** is noted that all solutions are isospin degenerate.

关键词： non-Hermitian quantum mechanics Schrodinger equation meson-meson interaction one-pion exchanging potential resonance state bound state

Research of influence of the additional electrode on Hall thruster plume by particle-in-cell simulation

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Chinese Physics B 2020年第9期29卷 377-383页

作者： xi-Feng cao Hui Liu Da-Ren Yu Laboratory of Plasma Propulsion Harbin Institute of TechnologyHarbin 150001China

Hall thruster is an electric propulsion device for attitude control and position maintenance of *** discharge process of Hall thruster will produce divergent *** plume will cause erosion,static electricity,and other interference to the main components,such as solar sailboard,satellite body,and ***,reducing the divergence of the plume is an important content in the research of thruster *** additional electrode to the plume area is a way to reduce the divergence angle of the plume,but there are few related *** paper uses the particle-in-cell(PIC)simulation method to simulate the effect of the additional electrode on the discharge of the Hall thruster,and further explains the effect mechanism of the additional electrode on parameters such as the electric field and plume divergence *** simulation results show that the existence of the additional electrode can enhance the potential near the additional *** increase of the potential can effectively suppress the radial diffusion of ions,and effectively reduce the plume divergence *** simulation results show that when the additional electrode is 30 V,the half plume divergence angle can be reduced by 18.21%.However,the existence of additional electric electrode can also enhance the ion bombardment on the magnetic *** additional electrode is relatively outside,the plume divergence angle is relatively small,and it can avoid excessive ion bombardment on the magnetic *** research work of this paper can provide a reference for the beam design of Hall thruster.

关键词： Hall thruster additional electrode plume divergence

Development of a Recombinase-aided Amplification Combined With Lateral Flow Dipstick Assay for the Rapid Detection of the African Swine Fever Virus

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Biomedical and Environmental Sciences 2022年第2期35卷 133-140页

作者： LI Jiang Shuai HAO Yan Zhe HOU Mei Ling ZHANG Xuan ZHANG xiao guang cao Yu xi LI Jin Ming MA Jing ZHOU Zhi xiang Faculty of environment and life Beijing University of TechnologyBeijing 100024China State Key Laboratory for Infectious Disease Prevention and Control National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China National Institute of Viral Disease Control and Prevention Beijing 100052China China Animal Health and Epidemiology Center Qingdao 266032ShandongChina

Objective To establish a sensitive,simple and rapid detection method for African swine fever virus(ASFV)B646L *** A recombinase-aided amplification-lateral flow dipstick(RAA-LFD)assay was developed in this ***-aided amplification(RAA)is used to amplify template DNA,and lateral flow dipstick(LFD)is used to interpret the results after the amplification is *** lower limits of detection and specificity of the RAA assay were verified using recombinant plasmid and pathogenic nucleic *** addition,30 clinical samples were tested to evaluate the performance of the RAA *** The RAA-LFD assay was completed within 15 min at 37°C,including 10 min for nucleic acid amplification and 5 minutes for LFD reading *** detection limit of this assay was found to be 200 copies per *** there was no cross-reactivity with other swine *** A highly sensitive,specific,and simple RAA-LFD method was developed for the rapid detection of the ASFV.

关键词： African swine fever virus Recombinase aided amplification Lateral flow detection

Effect of Incoming Vortex on Secondary Flows in Turbine Cascades with Planar and Non-Axisymmetric Endwall

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Journal of Thermal Science 2024年第1期33卷 138-157页

作者： cao Zhiyuan WANG Chuxuan SONG Zhigao GAO xi ZHAO Wei LIU Bo School of Power and Energy Northwestern Polytechnical UniversityXi'an 710072China National Key Laboratory of Science and Technology on Aerodynamic Design and Research Northwestern Polytechnical UniversityXi'an 710072China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100080China School of Aeronautics and Astronautics University of Chinese Academy of SciencesBeijing 100080China

Non-Axisymmetric Endwall Profiling(NAEP) is commonly utilized in turbines to eliminate secondary ***,most of the NAEP methods consider a single-blade row environment without incorporating the effect of the stage *** paper aims to investigate the influence mechanism of the incoming vortex on the endwall secondary flow structures of NAEP in a highly loaded turbine *** model the incoming vortex in a stage environment,this study considers a half-delta wing as the vortex generator at the upstream of the turbine *** NAEP is then carried out for a highly loaded turbine cascade with an in-house numerical optimization design platform subject to no incoming *** simulation is also carried out under the influence of the incoming vortex for the turbine cascades with both planar and non-axisymmetric *** paper furthers investigated the pitchwise effect of the incoming vortex on the near endwall secondary *** results indicate that the NAEP effectively improves the endwall secondary flow of the turbine cascade,where the total pressure loss coefficient and the secondary kinetic energy(SKE) are reduced by 7.3%,and 45.7%,*** is further seen that with the incoming vortex,the NAEP achieves a considerable control effect on the endwall secondary flow of the turbine *** incoming vortex,the NAEP can still achieve considerable control effect on the endwall secondary flow of the turbine cascade;the averaged reductions of loss coefficient and SKE are 7.8% and 14.2%,*** some pitchwise locations,incoming vortex can suppress the convection of cross-passage flow toward the suction corner greatly and reduce the loss coefficient of the baseline *** incoming vortex at 4/7 pitch impinged right at the blade leading edge,leading to the generation of low-momentum fluid,which increased the size and the strength of the horseshoe *** all the pitchwise locations,NAEP can suppress the seco

关键词： non-axisymmetric endwall secondary flow incoming vortex passage vortex stage environment

人工智能文生视频大模型Sora对科技伦理的冲击及应对

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新疆师范大学学报（哲学社会科学版） 2025年第1期46卷 142-148页

作者：曹贤平南昌工程学院马克思主义学院江西南昌330099

Sora的推出是人类社会发展和人工智能进步的标志性事件,凸显出生成式人工智能的强大功能。Sora的爆火离不开规模化数据、先进算法和规模化算力,其内在运行机制紧扣文本输入、文本编码、视频生成和视频输出的基本逻辑,在人类社会具有广... 详细信息

Sora的推出是人类社会发展和人工智能进步的标志性事件,凸显出生成式人工智能的强大功能。Sora的爆火离不开规模化数据、先进算法和规模化算力,其内在运行机制紧扣文本输入、文本编码、视频生成和视频输出的基本逻辑,在人类社会具有广阔应用前景。但Sora在技术更迭和运用过程中可能给科技伦理带来诸如冲击人的主体性地位、导致人们认知的混乱性、冲击伦理规则的适用性、冲击数字隐私伦理并造成数字歧视等风险。因此,要坚持以人为本,运用技术手段增强Sora的数据筛选力度和敏捷治理效度,防止数据泄露和侵犯隐私,进行伦理设计实现科技伦理与时俱进,辅之必要的教育培训,以此提升全民运用人工智能技术的能力。

关键词： Sora 生成式人工智能科技伦理

Comparative Analysis of Polysaccharides from Two Ecological Types of Leymus chinensis

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Chemical Research in Chinese Universities 2012年第4期28卷 677-681页

作者： LI Jing-jing BI Hong-tao YAN Jl-hong SUN Fang FAN Sha-sha cao Gang ZHOU Yi-fa CHEN xi-guang College of Marine Life Science Ocean University of China Qingdao 266003 P. R. China Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining 810008 P. R. China Bee Research Institute Chinese Academy of Agricultural Sciences Beo'ing 100093 P. R. China School of Life Sciences Northeast Normal University Changchun 130024 P. R. China

Leymus chinensis（Trin.） Tzvel.,widely distributed at eastern Eurasian steppe and divided into gray-green type and yellow-green type,has different stress resistance to *** the present study,the water-soluble polysaccharides from two ecotypes of *** were analyzed in detail,and the differences between polysaccharides from the two ecotypes of *** in the yield,monosaccharide composition,molecular weight and structure were *** polysaccharides of *** were composed of both neutral and acidic *** neutral polysaccharides contained mannose,glucose,galactose,xylose and arabinose,and mainly consisted of β-1,4-Glcp,α-1,3-Galp and α-1,2-Xylp *** acidic polysaccharides contained mannose,rhamnose,glucuronic acid,galacturonic acid,glucose,galactose,xylose and ***,the yields,monosaccharides contents and the molecular weights of the polysaccharides from the two ecotypes of *** were ***,the resistance type（gray-green type） of *** contained a number of α-1,3-Manp and reducing end of β-Glcp residues,and much more O-methyl groups than normal type（yellow-green type） of *** differences of the polysaccharides of the two ecotypes of *** might be due to the long-term environmental adaptability of plant,and the differences of the polysaccharides might influence the stress resistance of ***.

关键词： Leymus chinensis Polysaccharide Fractionation