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Flexible manufacturing technology of controlling exact bake hardening value in continuous galvanizing line

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Journal of Iron and Steel Research International 2018年第12期25卷 1296-1302页

作者： Xiao-fei Zheng Yong-lin kang bao-yong Wang Zhi-gang Han Xin-Iong Luo School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Shougang Jingtang Iron and Steel United Co. Ltd. Tangshan 063200HebeiChina

Flexible manufacturing technology for ultra-low-carbon bake hardening (BH)steels with different solute carbon contents in the range of (6-16)× 10^-4 wt.%was systematically *** effects of soaking temperature,cooling rate and aging time on solute carbon content were *** bake hardening value in a continuous galvanizing line with an over-aging section was *** manufacturing parameters were calculated using the design of experiment to obtain the best and most flexible process *** indicate a relationship among carbon content,soaking temperature and cooling *** solute carbon is 9 × 10^-6,cooling rate is 50 ℃/s,the soaking temperature is 745 ℃,and BH value is 45 MPa,the requirements of an automobile factory can be met.

关键词： Bake hardening value Solute carbon content Aging time Soaking temperature Cooling rate

Formation of Multi-branched Domains in Magnetic Garnet Bubble Films

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Chinese Physics Letters 2000年第1期17卷 52-54页

作者： ZHOU Yan ZHENG De-juan LI Dan HAN bao-Shan State Key Laboratory of Magnetism Institute of PhysicsChinese Academy of SciencesBeijing 100080 Cryogenic Laboratory Chinese Academy of SciencesBeijing 100080

A “low-bias-Held method”,for the formation of multi-branched domains(MED's)in garnet bubble films has been *** using this method,only a single MBD can be formed each time inside a pancake coil with an inner diameter of 1 *** formation of MBD's is associated with the nucleettion of vertical-Bloch-lines in their ***,with the decrease of the bias field H_(b) from the "critical static bias field for multi-branched expansion" D[d],the patterns of MBD's become more and more complex,accompanying with the successive formation of three types of hard *** typical photos and the static properties of MBD's are presented.

关键词： walls MBD method

Design of Discrete-time Repetitive Control System Based on Two-dimensional Model

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International Journal of Automation and computing 2012年第2期9卷 165-170页

作者： Song-Gui Yuan Min Wu bao-Gang Xu Rui-juan Liu School of Information Science and Engineering Central South University Changsha 410083 PRC School of Electrical and Information Engineering Changsha University of Science and Technology Changsha 410076 PRC

This paper presents a novel design method for discrete-time repetitive control systems （RCS） based on two-dimensional （2D） discrete-time model. Firstly, the 2D model of an RCS is established by considering both the control action and the learning action in RCS. Then, through constructing a 2D state feedback controller, the design problem of the RCS is converted to the design problem of a 2D system. Then, using 2D system theory and linear matrix inequality （LMI） method, stability criterion is derived for the system without and with uncertainties, respectively. Parameters of the system can be determined by solving the LMI of the stability criterion. Finally, numerical simulations validate the effectiveness of the proposed method.

关键词： Linear systems learning control discrete-time repetitive control two-dimensional (2D) systems linear matrix inequality.

Electrochemistry and In-situ Spectroelectrochemistry Studies of Carbazole and 9-Ethylcarbazole

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Chinese Chemical Letters 2005年第12期16卷 1621-1624页

作者： Zi Pin ZHANG bao kang JIN Yu Peng TIAN Shi Jun WANG School of Chemistry and Chemical Engineering Anhui University Hefei 230039

Mechanisms of electron transfer of carbazole （CZ） and 9-ethylcarbazole （ECZ） were studied by electrochemistry and in-situ spectroelectrochemistry. The result indicated that the electrochemical reaction mechanism of ECZ was the same as that of CZ. Both of them undergo ECE process： the initial step is removal of one electron to generate very reactive cation radical, this species then proceeded by deprotonation-coupling reaction to form the corresponding dimer, which was oxidized continuously.

关键词： Carbazole in-situ spectroelectrochemistry cation radical

Turning a hot spot into a cold spot:polarization-controlled Fano-shaped local-field responses probed by a quantum dot

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Light(Science & Applications) 2020年第1期9卷 417-428页

作者： juan Xia Jianwei Tang Fanglin bao Yongcheng Sun Maodong Fang Guanjun Cao Julian Evans Sailing He Centre for Optical and Electromagnetic Research State Key Laboratory of Modern Optical InstrumentationNational Engineering Research Center for Optical InstrumentationJORCEPCollege of Optical Science and EngineeringZhejiang University310058 HangzhouChina School of Physics Huazhong University of Science and Technology430074 WuhanChina Centre for Optical and Electromagnetic Research ZJU-SCNU Joint Center of PhotonicsSouth China Academy of Advanced OptoelectronicsSouth China Normal University510006 GuangzhouChina Department of Electromagnetic Engineering School of Electrical EngineeringRoyal Institute of TechnologyS-10044 StockholmSweden

Optical nanoantennas can convert propagating light to local *** local-field responses can be engineered to exhibit nontrivial features in spatial,spectral and temporal domains,where local-field interferences play a key ***,we design nearly fully controllable local-field interferences in the nanogap of a nanoantenna,and experimentally demonstrate that in the nanogap,the spectral dispersion of the local-field response can exhibit tuneable Fano lineshapes with nearly vanishing Fano dips.A single quantum dot is precisely positioned in the nanogap to probe the spectral dispersions of the local-field *** controlling the excitation polarization,the asymmetry parameter q of the probed Fano lineshapes can be tuned from negative to positive values,and correspondingly,the Fano dips can be tuned across a broad spectral ***,at the Fano dips,the local-field intensity is strongly suppressed by up to ~50-fold,implying that the hot spot in the nanogap can be turned into a cold *** results may inspire diverse designs of local-field responses with novel spatial distributions,spectral dispersions and temporal dynamics,and expand the available toolbox for nanoscopy,spectroscopy,nano-optical quantum control and nanolithography.

关键词： quantum local dispersion

Initiation and Kinematic Process of Debris Flow with the Existence of Terraced Fields at the Sources

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Journal of Earth Science 2024年第5期35卷 1613-1625页

作者： Liang Yang Yang Wang kang Liao Longfei Zhang Aiyun Chen juan Du Faculty of Engineering China University of GeosciencesWuhan 430074China China Railway Siyuan Survey and Design Group Co. LTD.Wuhan 430063China

A debris flow,with terraced fields as the source area,broke out on June 25th,2018 in the Xiaotuga area of Yunnan Province,China,and this kind of debris flow is rarely *** purposes in this study:(1)the influence of flow drag force on slope stability;(2)back-analyze the movement process of debris ***,the geological background and movement of this debris flow were described based on a field ***,drag force,calculated by the laminar flow theory,is added to the slope stability calculation model,which elaborates the initiation process of this ***,dynamic simulation software(DAN3D)was used to simulate the kinematic process of the debris flow with a variety of combination *** study shows that the terrace area can quickly produce surface runoff and create a drag force under rainfall conditions,which is the essential reason for the initiation of debris *** addition,the use of the FVV(Frictional-Voellmy-Voellmy)model is found to provide the best performance in simulating this type of debris flow,which reveals that it lasts approximately 200 s and that the maximum velocity is 12 m/s.

关键词： debris flow initiation process kinematic process terraced fields engineering geology

Effects of cooling rate on the microstructure and properties of magnesium alloy-a review

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Journal of Magnesium and Alloys 2024年第8期12卷 3094-3114页

作者： Huisheng Cai Nannan Zhang Liang Liu juan Su Yuguang Li Yu kang Feng Guo Inner Mongolia Key Laboratory of Thin Film and Coatings School of Material Science and EngineeringInner Mongolia University of TechnologyHohhot 010051China School of Sino-German Engineering Shanghai Technical Institute of Electronics and InformationShanghai 201411China

Magnesium alloy is one of the most widely used lightweight structural materials,and the development of high strength-toughness magnesium alloy is an important research field at present and even in the *** preparation process parameters of magnesium alloy directly affect the microstructure of the magnesium alloy,and then determine the properties of the magnesium *** cooling rate has important effects on the microstructure and properties of the magnesium alloy,and is an important preparation process parameter that cannot be *** the cooling rate from liquid phase to solid phase and the cooling rate of the magnesium alloy after heat treatment will change the microstructure of the magnesium ***,the properties of magnesium alloy will be *** this paper,the effects of cooling rate on the solidification behavior,the rheological behavior,the change of microstructure(the solid solution of alloying elements in matrix,the composition,size,distribution and morphology of second phase,the diffusion and segregation of alloying elements,the grain size,the formation and morphology of dendrite,etc.),and the effects of cooling rate of magnesium alloy after heat treatment on the microstructure and stress distribution are *** reasons for the divergence about the influence of cooling rate on the microstructure of magnesium alloy are analyzed in *** effects of cooling rate on the mechanical properties,corrosion resistance and oxidation resistance of magnesium alloy are also analyzed and discussed ***,the new methods and approaches to study the effects of cooling rate on the microstructure and properties of magnesium alloy are prospected.

关键词： Magnesium alloy Cooling rate Microstructure Mechanical properties Corrosion resistance Oxidation resistance

A Combined Clinicopathologic Analysis of 658 Urothelial Carcinoma Cases of Urinary Bladder

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Chinese Medical Sciences Journal 2012年第1期27卷 24-28页

作者： Hui-zhi Zhang Chao-fu Wang juan-juan Sun bao-hua Yu Department of Pathology Fudan University Shanghai Cancer CenterDepartment of OncologyShanghai Medical CollegeFudan UniversityShanghai 200032China

Objective To study the clinicopathological features of patients with urothelial carcinoma of the urinary bladder (UCB), and analyze the association of clinicopathological characteristics with tumor recurrence and progression. Methods Altogether 658 UCB cases in Fudan University Shanghai Cancer Center were collected from January 2006 to December 2010. The histopathologic materials and the clinical records were reviewed. Univariate and multivariate analyses were preformed to detect the association. Results The mean age of the patients was 61.97±12.97 years (range, 20-90 years). Male to female ratio was about 5:1. A total of 517 cases (78.6%) were superficial at the time of diagnosis (stage Ta/T1). The mean follow-up period was 22.36±24.92 months. Twenty-five patients lacking follow-up information were excluded in calculating recurrence and progression rates, the recurrence rate was about 37.0% (234/633), and progression rate about 6.2% (39/633). Three variables (grade, tumor growth pattern, and pathological stage) were found to be significant risk factors for tumor progression in univariate and multivariate analyses (P<0.05). Conclusions Most of the newly diagnosed UCB cases may be superficial diseases. Grade, tumor growth pattern, and pathological stage are associated with tumor progression of UCB.

关键词： urinary bladder urothelial carcinoma tumor growth pattern recurrence progression

Mapping subgenomic promoter of coat protein gene of Cucumber green mottle mosaic virus

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Journal of Integrative Agriculture 2020年第1期19卷 153-163页

作者： LIU Mei LIU Li-ming WU Hui-jie kang bao-shan GU Qin-sheng Henan Provencial Key Laboratory of Fruit and Cucurbit Biology Zhengzhou Fruit Research InstituteChinese Academy of Agricultural Sciences

Many plant viruses utilize subgenomic RNA as gene expression strategy, therefore mapping subgenomic promoter(SGP) is extremely important for constructing viral vectors. Although Cucumber green mottle mosaic virus(CGMMV)-based virus vectors have been constructed, SGP of the coat protein(CP) has not yet mapped. To this end, we firstly presumed 13 nucleotides upstream of the start codon as the transcription starting site(TSS) as previous study identified by random amplification of c DNA ends(RACE). Secondly, the region from nucleotides –110 to +175 is the putative CP SGP, as predicted, a long stem loop structure by the secondary structure of RNA covering movement protein(MP) and CP. To map the CGMMV CP SGP, we further constructed a series of deletion mutants according to RNA secondary structure prediction. The deletion of TSS upstream significantly enhanced CP transcription when 105 nucleotides were retained before the CP TSS. For the downstream of CP TSS, we analyzed the expression of enhanced green fluorescent protein(EGFP) in a series of vectors with partial deletion of the CGMMV CP and found that the nucleotides from +71 to +91 played a key role in the EGFP expression at the transcription level, while EGFP showed the highest expression level when 160 nucleotides were retained downstream of the CP TSS. To confirm these results, we applied online software MEME to predict the motifs and cis-acting elements in the 466 nucleotides covering the sequences of deletion analysis. Conserved motifs and relative acting elements were in regions in which transcription levels were the highest or enhanced. To our best knowledge, this is the first mapping of CGMMV SGP.

关键词： Cucumber green mottle mosaic virus coat protein subgenomic promoter