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Internal friction behavior of Ni_(50.5)Mni_(25)Ga_(24.5)alloy with cellular microstructure

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Rare Metals 2023年第5期42卷 1706-1711页

作者： Jun-Yi liu Jing-Min Wang Cheng-Bao Jiang hui-Bin Xu zhi-Song Xiao School of Materials Science and Engineering Beihang UniversityBeijing100191China School of Physics and Nuclear Energy Engineering Beihang UniversityBeijing100191China

Ni_(50.5)Mn_(25)Ga_(24.5)alloy with cellular microstructure was *** effect of the cellular microstructure on the internal friction(IF)behavior associated with martensitic transformation(MT),premartensitic transformation(PMT)and twin boundary motion(TBM)was *** with conventional NiMn-Ga alloys,the temperature span of the IF_(MT)peak is significantly expanded,the IF_(PMT)is weakened,and no IF_(TBM)is *** IF_(MT)and IF_(PMT)in the cellular microstructure exhibit unique frequency dispersion feature which has never been observed in conventional Ni-Mn-Ga *** effect of point defects associated with the cellular microstructure is considered to understand the observed results.

关键词： Martensitic transformations Internal friction Microstructure Point defects

Effect of w(MgO)/w(Al_(2)O_(3)) ratio and basicity on microstructure and metallurgical properties of blast furnace slag

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Journal of Iron and Steel Research International 2021年第10期28卷 1223-1232页

作者： Wei-guo Kong Ji-hui liu Yao-wei Yu Xin-mei Hou zhi-jun He School of Materials and Metallurgy University of Science and Technology LiaoningAnshan114051LiaoningChina State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai UniversityShanghai200444China

The CaO–SiO_(2)–Al_(2)O_(3)–MgO system is the main component unit in the slag formation process in blast furnace *** structural changes directly affect the high-temperature metallurgical properties of *** dynamics simulations were thus conducted to analyze the microstructure changes of the quaternary slag system under different basicities and w(MgO)/w(Al_(2)O_(3))*** changes in w(MgO)/w(Al_(2)O_(3))ratio and basicity could affect the stability of each *** the basicity and w(MgO)/w(Al_(2)O_(3))ratio,the average coordination number of O surrounding Si atom only changed a little and remained approximately 4,indicating that Si exists as a stable structure of the[SiO4]4−tetrahedron in the slag structure,while the average coordination number of O surrounding Al atom changed greatly from 4 to 6,which indicated that the Al existence form could be transformed from[AlO_(4)]^(5−) tetrahedron to[AlO_(5)]^(7−) pentahedron and[AlO_(6)]^(9−) ***,the diffusion rate of ions was accelerated with the increase in w(MgO)/w(Al_(2)O_(3))ratio and ***,the self-diffusion coefficients of each ion were obtained,and the magnitudes were observed to be in the following order:Mg^(2+)>Ca^(2+)>Al^(3+)>Si^(4+).The calculation and analysis of the slag viscosity and activation energy of viscous flow under different basicities and w(MgO)/w(Al_(2)O_(3))ratios revealed that the metallurgical properties of slag at high temperature depend on the flow-unit diffusivity and the microstructure stability,simultaneously,the basicity should be controlled between 1.0 and 1.2,and the w(MgO)/w(Al_(2)O_(3))ratio could be controlled between 0.45 and 0.55.

关键词： Blast furnace slag Microstructure Basicity w(MgO)/w(Al_(2)O_(3))ratio Molecular dynamics

Covariance of Floral and Vegetative Traits in Four Species of Ranunculaceae:A Comparison between Specialized and Generalized Pollination Systems

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Journal of Integrative Plant Biology 2008年第9期50卷 1161-1170页

作者： Jin-liu Meng Xian-hui Zhou zhi-Gang Zhao Guo-Zhen Du Key Laboratory of Arid and Grassland Ecology of Ministry of Education at Lanzhou University Lanzhou 730000 China College of Life Sciences Wuhan University Wuhan 430072 China

Theory predicts that tighter correlation between floral traits and weaker relationship between floral and vegetative traits more likely occur in specialized flowers than generalized flowers, favoring by precise fit with pollinators. However, traits and trait correlations frequently vary under different environments. Through detecting spatiotemporal variation in phenotypic traits （floral organ size and vegetative size） and trait correlations in four Ranunculaceae species, we examined four predictions. Overall, our results supported these predictions to a certain degree. The mean coefficient of variation （CV） of floral traits in two specialized species （Delphinium kamaonense and Aconitum gymnandrum） was marginally significantly lower than that of another two generalized species （Trollius ranunculoides and Anemone obtusiloba）. The two specialized species also showed marginally significantly smaller CV in floral traits than vegetative size across the two species. The absolute mean correlation between floral and vegetative traits, or that between floral traits in species with specialized flowers was not significantly lower, or higher than that in generalized plants, weakly supporting the predictions. Furthermore, we documented a large variation in trait correlations of four species among different seasons and populations. Study of covariance of floral and vegetative traits will benefit from the contrast of results obtained from generalized and specialized pollination systems.

关键词： coefficient of variation floral traits generalized flower Ranunculaceae specialized flower trait correlation vegetative traits.

Performance of a serial-connection multi-chamber piezoelectric micropump

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光学精密工程 2005年第5期13卷 535-541页

作者： KAN Jun-wu XUAN Ming liu Guo-jun YANG zhi-gang WU Yi-hui College of Mechanical Science and Engineering J ilin University Changchun 130025 China Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130025 China

The concept and structure of serial-connection multi-chamber (SCMC) micropumps with cantilever valves is introduced. The SCMC micropump, which can be manufactured using conventional production techniques and materials, has a multi-layer circular planar structure. The border-upon piezoelectric actuators of a SCMC micropump work in anti-phase, as a result the pumping performance is similar to that of several single-chamber pumps running in series. The theoretical analysis shows that the pumping performance of a SCMC micropump depends not only on the characteristic and geometrical parameters of the piezoelectric actuators, but also on the number of pump chambers. Both flowrate and pressure of a SCMC pump can be enhanced to a certain extent. Four piezoelectric micropumps with different chambers were fabricated and tested. The testing results show that the enhancing extents of the flowrate and pressure of a SCMC piezoelectric micropump are different. The maximum flowrate and pressure of the four-chamber pump achieved are 2.5 times and 3.6 times those of the single-chamber pump achieved.

关键词： SCMC 微电子系统 MEMS PZT 压电泵

Design of a node architecture for logic-calculation Nased all-optical network coding scheme

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The Journal of China Universities of Posts and Telecommunications 2013年第5期20卷 110-116,128页

作者： QU zhi-jian XIE Yin-bao WANG Ju-hui liu Xiao-hong School of Computer Science and Technology Shandong University of Technology

Network coding brings many benefits for multicast networks. It is necessary to introduce network coding into optical networks. Nevertheless, the traditional network coding scheme is hard to be implemented in optical networks because of the weak operation capability in photonic domain. In the paper, we focused on realizing two-channel network coding in all-optical multicast networks. An optical network coding scheme which can be realized via logic shift and logic XOR operations in photonic domain was proposed. Moreover, to perform the network coding scheme the coding node structure was designed and the operation principle and processes were illustrated in detail. In the end of the paper, the performance and the cost of different all-optical multicast mode were compared and analyzed.

关键词： network coding optical logic calculation coding node all-optical multicast

Nanometer Stripe Microstructure of Supersaturated Solid Solution in Fe-Cu Alloy

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Journal of Iron and Steel Research International 2007年第1期14卷 64-68页

作者： REN hui-ping WANG Hai-yan liu Zong-chang AN zhi-guo College of Material and Metallurgy Engineering Inner Mongolia University of Science and TechnologyBaotou 014010 Inner Mongolia China

Strengthening due to precipitation of Cu in the a-Fe matrix is an important phenomenon utilized in the design of HSLA steels. In the present work, the microstructure of supersaturated solid solution in Fe-1.18%Cu binary alloy was investigated by means of high resolution electron microscopy. The results indicated that the solid solution was heterogeneous, there were lots of Cu atom clusters, which consisted of diffractive stripe microstructure similar to twin crystal. Orientation deviation was observed between two （110）o planes in diffractive stripes, which results in light and shade contrast. Furthermore, formation mechanisms of the nanometre stripe microstructure were discussed in terms of the interaction of Cu and Fe atoms in the Fe-Cu binary alloys.

关键词： Fe-Cu alloy supersaturated solid solution Cu-rich cluster nanometer stripe microstructure high resolution electron microscopy

Effect of SiO_(2) Aerogel-cement Mortar Coating on Strength of Self-Compacting Concrete after Simulated Tunnel Fire

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Journal of Wuhan University of Technology(Materials Science) 2021年第5期36卷 672-681页

作者： WANG Xinjie JIA zhi ZHU Pinghua liu hui CHEN Chunhong DONG Yanlong Department of Civil Engineering Changzhou UniversityChangzhou 213164China Railway 19th Bureau Group Sixth Engineering Co.Ltd Wuxi 214000Chinaa

In order to facilitate self-compacting concrete to be better used in tunnel linings that can resist fires,a SiO_(2) aerogel-cement mortar coating was *** on the HC curve,a self compacting concrete cube specimens coated and uncoated with SiO_(2) aerogel-cement mortar(SiO_(2)-ACM)were heated to simulate tunnel fire for 0.5,1,1.5,2,2.5,3 and 4 h,*** residual compressive strength was tested after the specimens were cooled to room temperature by natural cooling and water *** results show that,the damages of specimens become more serious as fire time goes on,but the residual strength of specimens coated with SiO_(2)-ACM is always higher than that of uncoated with SiO_(2)-*** addition,the residual strength of specimens cooled by water cooling is lower than that of natural ***,for the specimens coated with SiO_(2)-ACM,the adverse effects of water cooling are *** the increase of fire time,the protective effect of SiO_(2)-ACM is still gradually ***,a formula was established to predict the residual 150 mm cube compressive strength of specimens protected by SiO_(2)-ACM after a simulated tunnel fire.

关键词： self-compacting concrete SiO_(2)aerogel-cement mortar simulated tunnel fire residual compressive strength natural cooling water cooling

Isolation and Characterization of an Antimicrobial Polypeptide from Loach

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Chinese Chemical Letters 2003年第1期14卷 54-57页

作者： Xian zhi DONG hui Bi XU Kai Xun HUANG Qiong liu Department of Chemistry Huazhong University of Science and TechnologyWuhan 430074

A novel antimicrobial polypeptide was isolated and characterized from loach, Misgurnus anguillicaudatus. The polypeptide, named MAPP, is a single-chain polypeptide with Mw about 9,800 Dalton and pI about 4.78; the N-tag of MAPP was CFGWN. MAPP showed good inhibition against various bacteria including Bacillus subtilis, Escherichia coli and Staphylococcus aureus. MAPP could be used as a lead compound in antibiotics drug discovery.

关键词： Misgurnus anguillicaudatus isolation characterization.

Poorly controlled type II diabetes mellitus significantly enhances postoperative chemoresistance in patients with stage III colon cancer

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World Journal of Gastroenterology 2025年第3期31卷 29-41页

作者： Ruo-Yu Guan Jia-Wei Wu Zi-Yun Yuan zhi-Yuan liu Zi-Zhu liu zhi-Cong Xiao Jing-hui Li Cheng-zhi Huang Jun-Jiang Wang Xue-Qing Yao Guangdong Cardiovascular Institute Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesSouthern Medical UniversityGuangzhou 510080Guangdong ProvinceChina Department of Gastrointestinal Surgery Department of General SurgeryGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou 510080Guangdong ProvinceChina Department of General Surgery Guangdong Provincial People’s Hospital Ganzhou Hospital(Ganzhou Municipal Hospital)Ganzhou 341000Jiangxi ProvinceChina Shantou University Medical College Shantou 515041Guangdong ProvinceChina School of Medicine South China University of TechnologyGuangzhou 510006Guangdong ProvinceChina Gannan Medical University Ganzhou 341000Jiangxi ProvinceChina

BACKGROUND Type II diabetes mellitus(T2DM)has been associated with increased risk of colon cancer(CC)and worse prognosis in patients with *** effects of T2DM on postoperative chemoresistance rate(CRR)and long-term disease-free survival(DFS)and overall survival(OS)in patients with stage III CC who receive curative resection remain *** To investigate whether T2DM or glycemic control is associated with worse postoperative survival outcomes in stage III *** This retrospective cohort study included 278 patients aged 40-75 years who underwent surgery for stage III CC from 2018 to *** on preoperative T2DM history,the patients were categorized into non-DM(n=160)and DM groups(n=118).The latter was further divided into well-controlled(n=73)and poorly controlled(n=45)groups depending on the status of glycemic ***,OS,and CRR were compared between the groups and Cox regression analysis was used to identify risk *** Patients in the DM and non-DM groups demonstrated similar DFS,OS,and CRR(DFS:72.03%vs 78.75%,P=0.178;OS:81.36%vs 83.12%,P=0.638;CRR:14.41%vs 7.5%,P=0.063).Poorly controlled DM was associated with a significantly worse prognosis and higher CRR than well-controlled DM(DFS:62.22%vs 78.07%,P=0.021;OS:71.11%vs 87.67%,P=0.011;CRR:24.40%vs 8.22%,P=0.015).High preoperative fasting plasma glucose[DFS:Hazard ratio(HR)=2.684,P<0.001;OS:HR=2.105,P=0.019;CRR:HR=2.214,P=0.005]and glycosylated hemoglobin levels(DFS:HR=2.344,P=0.006;OS:HR=2.119,P=0.021;CRR:HR=2.449,P=0.009)indicated significantly poor prognosis and high CRR,while T2DM history did not(DFS:HR=1.178,P=0.327;OS:HR=0.933,P=0.739;CRR:HR=0.997,P=0.581).CONCLUSION Increased preoperative fasting plasma glucose and glycosylated hemoglobin levels,but not T2DM history,were identified as risk factors associated with poor postoperative outcomes and high CRR in patients with stage III CC.

关键词： Colon cancer Chemoresistance Diabetes mellitus Prognosis Type II diabetes mellitus