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Research on Mechanical Model of Material during Twin Roll Strip Casting Process

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Journal of Iron and Steel Research International 2003年第1期10卷 20-23页

作者： MIAO Yu-chuan ZHANG Xiao-ming DI Hong-shuang WANG Guo-dong LIU Xiang-hua baoshan Iron and Steel Company Northeastern university

The prototype, basic parameters, composition and structure of computer simulation system of stretch reducing mill for tubes were introduced. The software has an obvious style of object-oriented programming, and the modules were integrated in the simulation system. The system can optimize pass design, and it can automatically classify pass series according to the product syllabus, formulate the rolling table and simulate the rolling parameters in stretch reducing process. The simulation results were compared with the detailed technical data (used as experimental data) provided by Baotou Iron and Steel Company, and the comparison gave a clear proof of the precision of the models.

关键词： tube stretch reducing mill pass design force parameter simulation

Unraveling the oxygen evolution activity of biomass-derived porous carbon plate as self-supported metal-free electrocatalyst for water splitting

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Progress in Natural Science:Materials International 2024年第5期34卷 967-976页

作者： Xinghe Zhang Yujie Wang Jin Zou Sushan Zhao Hongbo Hou Wenhua Yao Huaipeng Wang College of Resource and Environment Baoshan University School of Integrated Circuits Tsinghua University

Developing the efficient and low-cost electrocatalysts derived from biomass is a desired solution to address economy and sustainability challenges of hydrogen production from water electrolysis due to utilizing metalbased catalysts. Herein, the peeled cornstalk-derived porous carbon plates synthesized by salt template-assisted high-temperature pyrolysis are utilized as self-supported metal-free electrocatalysts to unravel the oxygen evolution activity for alkaline water splitting. The resultant PC-700-10 honeycomb carbon catalyst exhibits the superior electrocatalysis for oxygen evolution owning to its high specific surface area of 52.0 m2g-1, suitable microand meso-pores, electron-withdrawing pyridinic-N moiety and appropriate balance between hydrophilicity and electroconductivity. Theoretical calculations reveal that the largest energy barrier of forming *OOH limits the OER rate and *OH oxidation generates the energetically more favorable epoxide intermediate. This finding opens the way to construct the hopeful metal-free OER electrocatalysts via regulating their intrinsic structure, and inspires the applications of waste biomass in the energy-correlated fields.

关键词： Cornstalk Hierarchical pore Oxygen evolution reaction Pyridinic-N Self-supported

Charmonium dissociation in collisions with φ mesons in hadronic matter

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Chinese Physics C 2017年第2期41卷 105-111页

作者：季石涛许晓明 Department of Physics Shanghai University Baoshan Shanghai 200444 China

The φ-charmonium dissociation reactions in hadronic matter are *** cross sections for ФJ/ψ → Ds^-Ds^＋, ФJ/ψ →Ds^＊-Ds^＋ or Ds^-Ds^＊＋, ФJ/ψ →Ds^＊-Ds^＊＋, Фψ′→Ds^＊-Ds^＋, Фψ′→ Ds^＊-Ds^＋ or Ds^-Ds^＊＋,Фψ′→Ds^＊-Ds^＊＋,Фχc →Ds^-Ds^＋, Фχc→Ds^＊-Ds^＋ or Ds^-Ds^＊＋ and Фχc → Ds^＊-Ds^＊＋ are calculated in the Born approximation,in the quark-interchange mechanism and with a temperature-dependent quark *** potential leads to remarkable temperature dependence of the cross *** the cross sections and the Ф distribution function we calculate the dissociation rates of the charmonia in interactions with the Ф meson in hadronic *** dependence of the rates on temperature and charmonium momentum is relevant to the influence of Ф mesons on charmonium suppression.

关键词： charmonium dissociation cross sections quark-interchange mechanism dissociation rate

Cross sections for inelastic K+ϕscattering

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Chinese Physics C 2023年第8期47卷 54-63页

作者：潘奕豪许晓明 Department of Physics Shanghai UniversityBaoshanShanghai 200444China

In the first Born approximation,we study the reactions Kφ→πK,ρK,πK*,and ρK*with quark-antiquark annihilation and *** amplitudes are derived with the development in the spherical harmonics of the relative-motion wave functions of two initial mesons and two final mesons so that parity is conserved and the total angular momentum of the final mesons equals that of the initial *** cross sections are calculated from the transition amplitudes that also contain mesonic quark-antiquark relative-motion wave functions and transition potentials for quark-antiquark annihilation and *** notable temperature dependence of the cross sections is *** cross sections for Kφ→ρK,Kφ→K*,and Kφ→ρK*may be of the millibarn scale,whereas the cross section for Kφ→πK is small.

关键词： meson-meson scattering quark-antiquark annihilation and creation quark potential model

Influence of Screw Design on Burden Descending Velocity and Particle Segregation in COREX Shaft Furnace

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Journal of Iron and Steel Research International 2016年第6期23卷 516-524页

作者： Hai-feng LI Heng ZHOU Tao ZHANG Yang YOU Zong-shu ZOU Wan-ren XU School of Metallurgy Northeastern University baoshan Iron and Steel Co. Ltd.

COREX shaft furnace（SF）is an industrial system that employs screw feeders;thus,the burden descending velocity and particle segregation in the SF can be directly affected by the design of screw.A three-dimensional actual size model of COREX-3000 SF was established using the discrete element *** types of burdens,including pellet,ore,flux and coke,were considered in this *** this consideration,the effect of screw design on solid flow was *** showed that,in the base case,burdens fell primarily down from the first flight of the *** burden descending velocities were nearly uniform in the peripheral direction and decreased along the radial *** addition,the normalized particle size increased in the center area and decreased in the wall *** the flight diameter of screw benefited an even flow pattern and restrained the rolling tendency of burden from the edge to center *** optimized case was also proposed,in which a uniform solid flow profile could be obtained and the evenness of descending velocity along the radius could be greatly improved.

关键词： screw COREX descending burden normalized radius Velocity segregation torque pellet

Segmentation-Free Recognition Algorithm Based on Deep Learning for Handwritten Text Image

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Journal of Artificial Intelligence and Technology 2024年第2期4卷 169-178页

作者： Ge Peng School of Big Data Baoshan UniversityBaoshanYunnan 678000China

Segmentation-based offline handwritten character recognition algorithms suffered from the segmenting difficulty of interleaving and touching in handwritten *** tackle the problem,a segmentation-free recognition algorithm based on deep learning network is proposed in this *** network consists of four neural layers,including input layer for image preprocessing,convolutional neural networks(CNNs)layer for feature extraction,bidirectional long-short term network(BDLSTM)layer for sequence prediction,and connectionist temporal classification(CTC)layer for text sequence alignment and ***,a novel data processing method is performed for data length *** on this,groups of experiments,based on six typical databases,involved in evaluation indicators of character correct rate,training time cost,storage space cost,and testing time cost are carried *** experimental results show that the proposed algorithm has better performances in accuracy and efficiency than other classical algorithms.

关键词： deep learning image processing segmentation-free handwritten image recognition sequence labeling

Primary biliary cirrhosis degree assessment by acoustic radiation force impulse imaging and hepatic fibrosis indicators

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World Journal of Gastroenterology 2016年第22期22卷 5276-5284页

作者： Hai-Chun Zhang Rong-Fei Hu Ting Zhu Ling Tong Qiu-Qin Zhang Department of Ultrasound Huashan Hospital Baoshan Branch Affiliated to Fudan University Department of Gastroenterology Huashan Hospital Baoshan Branch Affiliated to Fudan University

AIM: To evaluate the assessment of primary biliary cirrhosis degree by acoustic radiation force impulse imaging (ARFI) and hepatic fibrosis indicators. METHODS: One hundred and twenty patients who developed liver cirrhosis secondary to primary biliary cirrhosis were selected as the observation group, with the degree of patient liver cirrhosis graded by Child-Pugh (CP) score. Sixty healthy individuals were selected as the control group. The four indicators of hepatic fibrosis were detected in all research objects, including hyaluronic acid (HA), laminin (LN), type III collagen (PC III), and type IV collagen (IV-C). The liver parenchyma hardness value (LS) was then measured by ARFI technique. LS and the four indicators of liver fibrosis (HA, LN, PC III, and IV-C) were observed in different grade CP scores. The diagnostic value of LS and the four indicators of liver fibrosis in determining liver cirrhosis degree with PBC, whether used alone or in combination, were analyzed by receiver operating characteristic (ROC) curve. RESULTS: LS and the four indicators of liver fibrosis within the three classes (A, B, and C) of CP scores in the observation group were higher than in the control group, with C class > B class > A class; the differences were statistically significant (P < 0.01). Although AUC values of LS within the three classes of CP scores were higher than in the four indicators of liver fibrosis, sensitivity and specificity were unstable. The ROC curves of LS combined with the four indicators of liver fibrosis revealed that: AUC and sensitivity in all indicators combined in the A class of CP score were higher than in LS alone, albeit with slightly decreased specificity; AUC and specificity in all indicators combined in the B class of CP score were higher than in LS alone, with unchanged sensitivity; AUC values (0.967), sensitivity (97.4%), and specificity (90%) of all indicators combined in the C class of CP score were higher than in LS alone (0.936, 92.1%, 83.3%).

关键词： Acoustic radiation force imaging technology Hepatic fibrosis index Primary biliary cirrhosis Diagnostic value

MIXED COMPATIBLE ELEMENT AND MIXED HYBRID INCOMPATIBLE ELEMENT VARIATIONAL METHODS IN DYNAMICS OF VISCOUS BAROTROPIC FLUIDS

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Applied Mathematics and Mechanics(English Edition) 1994年第6期15卷 561-569页

作者：沈孝明 1. baoshan Branch of Shanghai TV university Shanghai

This paper presents and proves the mixed compatible finite element variationalprinciples in dynamics of viscous barotropic fluids. When the principles are proved, itis found that the compatibility conditions of stress can be naturally satisfied. The gene-rallzed variational principles with mixed hybrid incompatible finite elements are alsopresented and proved, and they can reduce the computation of incompatible elements indynamics of viscous barotropic flows.

关键词： mechanics of viscous fluids computational fluid mechanics vari-ational principle finite element method mixed compatible el-ement mixed hybrid incompatible element

Flavone from Zhongjiefeng(Herba Sarcandrae Glabrae) inhibits platelet apoptosis in immune-induced bone marrow failure through mitochondrial pathway

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Journal of Traditional Chinese Medicine 2017年第5期37卷 643-649页

作者： Jiang Yiling Zheng Qin Zhang Aiping Cui Lele Xia Lemin Luo Meihong Department of Hematology Shanghai Baoshan Hospital of Integrated Traditional Chinese and Western Medicine Department of Hematology Baoshan Branch of Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine

OBjECTIVE: To investigate the effect of Flavone from Zhongjiefeng(Herba Sarcandrae Glabrae) on the platelet number in immune-induced bone marrow failure(BMF) and its mechanism of mitochondrial apoptotic ***: Immune-induced BMF model, established in mice, was randomly divided into four groups: normal control group without BMF, BMF control group, cyclosporine(CSA) group and flavone group(n = 10 in each group). Mice were given0.027 g/kg cyclosporine or 0.2 g/kg flavone lavage daily in either the cyclosporine or flavone group respectively. Platelet count, mitochondrial transmembrane potential(ΔΨm), cytochrome C(Cyt C), phosphatidylserine(PS), changes of calcium ion(Ca^(2+)),and protein expression of mitochondrial apoptotic pathway including B-cell lymphoma-2(bcl-2) Homologous Antagonist-Killer Protein(Bak), bcl-2-associated X protein(Bax), caspase-3, caspase-8, and caspase-9 were examined and ***: Compared with the normal control group, the BMF group had significantly lower levels of platelet count, ΔΨm, and expressions of caspase family proteins as well as higher levels of Cyt C, PS,Ca^(2+), and expressions of Bak and Bax(all P < 0.05).Compared with the BMF group, the CSA and flavone groups had significantly higher ΔΨm and expressions of caspase family proteins(all P < 0.05)whereas the levels of Cyt C, PS, Ca^(2+), and expressions of Bak and Bax were reduced(all P < 0.05).More importantly, the flavone group had higher levels of Cyt C, Ca^(2+)and expressions of Bak and Bax compared with the CSA group(all P < 0.05), while the levels of PS and caspase family proteins were reduced(all P < 0.05).CONCLUSION: Flavone from Zhongjiefeng(Herba Sarcandrae Glabrae) significantly increases the platelet number and prevents its apoptosis through mitochondrial pathway.

关键词： Flavone Herba Sarcandrae Mitochondria Apoptosis regulatory proteins