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Effect of process parameters on steel tube roundness in straightening process

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Journal of Iron and Steel Research International 2020年第11期27卷 1270-1283页

作者： Li-dong Ma Yu-kang Du Zhi-juan Meng Li-feng Ma zi-jian liu Pei-yu liu Coordinative Innovation Center of Taiyuan Heavy Machinery Equipment Taiyuan University of Science and TechnologyTaiyuan 030024ShanxiChina School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan 030024ShanxiChina School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024ShanxiChina School of Applied Science Taiyuan University of Science and TechnologyTaiyuan 030024ShanxiChina

The inclined six-roll tube straightener is an important equipment for the finishing *** can not only straighten the steel pipe,but also finish the ovality of the cross *** the actual straightening process,the cross section of the tube is prone to deform,that is,the round ness is not *** flatteni ng displacement is an import a nt parameter to control cross-section forming of *** to the established mechanical model,the analytical calculation equations of the flattening force and the flattening displacement were derived using the energy *** on the finite element simulation data,the ratios of the finite element results of the什attening force to the analytical ones were *** correlation coefficient after fitting is greater than 99%,and the fitting effect is *** flattening experiment was carried out on tubes of different materials and different specifications,and the setting method of the optimal flattening displacement during straightening process was *** the actual straightening process,using this flattening displacement,the ovality of straightened steel tube is less than 0.3%.Therefore,the proposed method can provide a reference for the flattening displacement in the actual straightening process.

关键词： Straightening Tube Energy method Flattening force Flattening displacement Finite element method

Hepatitis B Virus X Protein Upregulates Intracellular Calcium Signaling by Binding C-terminal of Orai1 Protein

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2018年第1期38卷 26-34页

作者： Jing-hong YAO zi-jian liu jian-hua YI Jun WANG Ya-nan liu Department of Infectious Diseases Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of Anatomy School of Basic Medical SciencesTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Gastroenterology the Central Hospital of WuhanTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430014China

Hepatitis B virus X(HBx)protein plays a pivotal role in the development of hepatitis B virus(HBV)-associated hepatocellular *** regulation of cytosolic calcium is essential for HBV replication and is mediated by HBx protein,the mechanism of HBx protein regulating intracellular calcium level remains poorly *** present study examined whether HBx protein elevated the intracellular calcium through interacting with storeoperated calcium entry(SOCE)components,Orai1 and stromal interaction molecule 1,and then identified the targets of HBx protein,with an attempt to understand the mechanism of HBx protein upsetting intracellular calcium *** employing co-immunoprecipitation and GST-pull-down assay,we found that Orai1 protein interacted with HBx protein,and the C-terminus of Orai1 was implicated in the *** microscopy also revealed that HBx protein could co-localize with full-length Orai1 protein in HEK293 ***,live cell calcium imaging exhibited that HBx protein elevated intracellular calcium,possibly by binding to SOCE *** results suggest that HBx protein binds to STIM1-Orai1 complexes to positively regulate the activity of plasma membrane store-operated calcium channels.

关键词： HBx protein store-operated calcium entry Orai 1 stromal interaction molecule 1 intracellular calcium

Synthesis and in vitro antitumor activity of novel diaryl urea derivatives

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Chinese Chemical Letters 2013年第5期24卷 386-388页

作者： Yan-Fang Zhao zi-jian liu Xin Zhai Dan-Dan Ge Qiang Huang Ping Gong Key Lab of New Drugs Design and Discovery of Liaoning Province School of Pharmaceutical EngineeringShenyang Pharmaceutical University

A series of novel diaryl ureas containing 4-[（2-amino-6-trifluromethyl）pyrimidine-4-yl]piperazine-l-yl group were synthesized and evaluated for their cytotoxic activities in a panel of human cancer cell lines. Compared with the reference drug Sorafenib,some compounds showed more potent and a broader spectrum of anti-cancer *** them,compound 2p demonstrated significant inhibitory activities against MDA-MB-231,HT-29 and MCF-7 cell lines with IC_（50） values of 0.016,0.63,0.001μmol/L, respectively.

关键词： Diaryl ureas Synthesis Antitumor activity in vitro

Influence of REV and ALV-J Co-Infection on Immunologic Function of T Lymphocytes and Histopathology in Broiler Chickens

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Agricultural Sciences in China 2010年第11期9卷 1667-1676页

作者： GUO Hui-jun, LI Hong-mei, CHENG zi-qiang , liu jian-zhu and CUI Zhi-zhong Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Veternary Medicine, Shandong Agricultural University, Tai’an 271018, P.R.China Key Laboratory of Animal Biotechnology and Disease Control and Prevention College of Veternary Medicine Shandong Agricultural University Tai'an 271018 P.R. China

The aim of present investigation is to study the effect of single- and co-infection with REV and ALV-J on T lymphocytes bioactivities and histopathology in broiler chickens. The bioactivities of blood and spleen T lymphocytes including lymphoproliferation responses, cytotoxicitic responses, and histopathology of spleen were detected in broiler chickens singly- or co-infected with REV and ALV-J at different days post inoculation and the virus expressions in spleen of infected broiler chickens were detected with immunofluorescence assay （IFA）. The results indicated that blood and spleen T lymphocytes proliferation responses and cytotoxicity in broilers infected with REV or/and ALV-J were inhibited in the whole observed period compared with controls. In the co-infected chickens they were highly inhibited than in the single-infected. The histopathology of spleen in infected chickens at 17 and 37 d post inoculation （dpi） indicated that cell interium increased, the numbers of lymphocytes decreased, and the regrowth were destroyed or decreased, especially more significantly at 17 than at 37 dpi. The different numbers of virus were detected in spleen lymphocytes in REV- infected and/or ALV-J-infected chickens. In the spleen of co-infected chicken, both REV and ALV-J were detected and the total numbers of viruses were more than in chickens singly-infected with REV or ALV-J. Thus, the co-effect of REV and ALV-J caused more immunosuppression on T lymphocytes bioactivities in broiler chickens than single-effect of ALV-J or REV, which contributed to the sever histopathology and the product of tumor cells. This study will be helpful for understanding the effect of co-infection with many viruses and control them in poultry.

关键词： reticuloendotheliosis virus (REV) J subgroup of avian leukosis virus (ALV-J) T lymphocyte activity,histopathology commercial broiler chickens

Spin-glass behavior in the competing CoCrGaO_(4)cubic spinel system

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Nano Research 2025年第1期18卷 501-507页

作者： Jiyu Hu jiangli Ni Zhenfa zi Chaocheng liu School of Physics and Materials Engineering Hefei Normal UniversityHefei 230009China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026China

Spin glasses(SGs),generally defined as disordered systems with randomized competing interactions,are widely investigated complex *** the ground states of spin glasses is crucial for understanding the nature of disordered magnets and many other physical manifestations,while also helping to solve some hard combinatorial optimization problems across multiple ***,the intrinsic cause of SG has always been elusive,especially in spinel oxide ***,we report the SG behavior observed in the cubic spinel oxides CoCrGaO_(4),and provide a comprehensive understanding of its intrinsic *** results indicate a frustrated state under multi-magnetic competition,and the features of SG are confirmed by susceptibility *** fitting parameters ofτ0,T0,and zv of isothermal remanent magnetization further reveal the relaxation behavior and strong spin ***,the varying exchange coupling under different temperatures and magnetic fields is unveiled,which should be responsible for the disordered *** studies unravel the underlying mechanism responsible for doping-induced magnetic frustration and introduce CoCrGaO_(4)as a potential platform for investigating spin glass behavior,thereby advancing fundamental research on frustrated magnetism within the spinel system.

关键词： spin glass(SG) magnetic frustration magnetic competition spinel ferrites

北京松山天然油松林土壤有机碳分布及其影响因素

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生态学杂志 2016年第10期35卷 2707-2713页

作者：高杰郭子健刘艳红北京林业大学森林培育与保护省部共建教育部重点实验室北京100083

随着全球气候的变化,森林土壤有机碳作为碳库的重要组成部分,成为森林碳循环研究的重点之一。以北京松山8块不同林龄天然油松林样地为研究对象,通过方差分析及方差分解的方法分析不同林龄土壤有机碳、碳密度的分布特征及影响因素,结果表... 详细信息

随着全球气候的变化,森林土壤有机碳作为碳库的重要组成部分,成为森林碳循环研究的重点之一。以北京松山8块不同林龄天然油松林样地为研究对象,通过方差分析及方差分解的方法分析不同林龄土壤有机碳、碳密度的分布特征及影响因素,结果表明:(1)该地区油松林土壤碳含量平均值为20.61 g·kg^(-1);土壤碳密度为153.67 t·hm^(-2),低于中国森林生态系统平均值(193.55 t·hm^(-2))。同一林龄土壤有机碳含量随土壤深度的增加而显著降低(P<0.05)。(2)在0~50 cm土层,不同林龄土壤有机碳含量普遍存在显著差异性(P<0.05),在50~100 cm层差异不显著。随着林龄增大,土壤碳密度显著增加(P<0.05)。各土层土壤碳密度与土壤碳含量随林龄变化趋势并不一致。中龄林、近熟林、成熟林、过熟林土壤有机碳均集中分布在较浅表层(0~30 cm),分别占总土层有机碳含量的81.1%、83.6%、82.5%、81.7%。(3)土壤各层碳含量、碳密度与土壤含水量呈显著相关(P<0.001,P<0.05),各层土壤碳含量与土壤容重呈显著负相关(P<0.05)。各样地土壤平均碳含量(ACC)、碳密度(ACD)与地形因子、林分特征因子以及土壤因子之间普遍存在显著关联。地形模型、林分特征模型、土壤模型对ACC、ACD方差的解释程度具有一定的差异性。总体而言,林分特征模型能较好地解释ACD方差,地形因子模型、土壤因子模型对结果解释程度相对偏低。林分特征模型和土壤模型结合起来能较好地解释ACC方差,地形因子模型对结果解释程度不高。

关键词：天然油松林土壤碳含量土壤碳密度林龄方差分解

Assembly molecular architectures through structural variance of metalloligand [Cu(PySal)2]

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Assembly molecular architectures through structural variance...

Influence of REV and ALV-J Co-infection on Immunologic Function of T Lymphocytes and Histopathological in Broiler Chickens

中国化学会第五届全国结构化学学术会议

作者： Xiu-jian Wang Hong-Xia jian zi-Ping liu Qing-Ling Ni liu-Cheng Gui Lian-Hua Tang School of Chemistry and Chemical Engineering,Guangxi Normal University,Guilin 541004,Guangxi,

A versatile metalloligand [Cu(PySal)]1,contains mobile components of freely rotating pyridyl groups and labile coordination geometry of Cu between square planar and *** 1 as a synthetic precursor,we have selectively p...

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Influence of REV and ALV-J Co-infection on Immunologic Funct...

Observation of topological charge transformations in acoustic vortex using passive periodic systems

全国动物生理生化第十一次学术交流会

作者： GUO Hun-jun,LI Hong-mei,CHENG zi-qiang,liu jian-zhu,CUI Zhi-zhong~* (College of Veternary Medicine,Shandong Agricultural University,Tai''an City,China)

＜正＞[Objective]To study the effect of single- and co-infection with REV and ALV-J on T lymphocytes bioactivities and histopathology in broiler chickens.[Method]Blood and spleen T lymphocytes bioactivities including lymphoproliferation responses and cytotoxicitic responses and pathological histopathology of spleen were detected in broiler chickens singl- or co-infected with REV and ALV-J at different days post inoculation,the viruses’ expression in infected broiler’s spleen were detected with immunofluorescence assay（IFA）.[Result]The results indicate that,blood and spleen T lymphocytes proliferate responses and cytotoxicity in broilers infected with REV or/and ALV-J were inhibited in the whole observed period compared with controls,in the co-infected chickens they were inhibited more severely than in the *** histopathology of spleen in infected chickens at 17 and 37 days post inoculation indicated that cell interium increased,the numbers of lymphocytes decreased and the regrowth were destroyed or decreased,especially more significiant at 17dpi than at 37 *** different numbers of virus were detected in spleen lymphocytes in REV-infected and/or ALV-J-infected chickens,*** co-infected chickens’ spleen,both REV and ALV-J were detected and the total numbers of viruses were more than in chickens single-infected with REV or ALV-J.[Conclusion]It can be concluded that co-effect of REV and ALV-J can cause more immunosuppression on T lymphocytes bioactivities in broiler chickens than single-effect of ALV-J or REV,which contribute to the sever histopathology and the product of tumor *** will be helpful for understanding of the effect of co- or dulpti-infection with many viruses and control them in poultry.

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 140-147页

作者： Di-Chao Chen Xie liu Changqing Xu Da-jian Wu Ying Cheng Xiao-Jun liu School of Physics and Technology Nanjing Normal University Key Laboratory of Modern Acoustics School of Physics Nanjing University

Vortex transmutation utilizes a periodic system, which not only enables the alteration of the topological charge(TC) of unstable input vortices but also facilitates their transformation into stable structures. This approach is crucial for investigating the characteristics of vortices in various wave systems. Here, we achieve acoustic vortex TC transmutation by employing a welldesigned dual-structured plate external system(DPES). The interactions between the acoustic vortex and the finite-order discrete rotational symmetry lead to the transformation of its topological charge when complete rotational symmetry is broken to Nthorder discrete symmetry. Our results experimentally demonstrate the acoustic vortex TC transmutation based on passive artificial structures, enabling numerous applications in particle manipulation and information multiplexing as well as advancing our understanding and control over free-space acoustic vortices.

关键词： acoustic vortex topological charge transformation artificial structure