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| 1 | Effect of cooling rate upon the microstructure and mechanical properties of in-situ TiC reinforced high entropy alloy CoCrFeNi显示文摘Three types of in-situ TiC(5 vol%,10 vol%and 15 vol%)reinforced high entropy alloy CoCrFeNi matrix composites were produced by vacuum induction smelting.The effect of two extreme cooling conditions(i.e.,slow cooling in fu rnace and rapid cooling in copper crucible)upon the microstructure and mechanical properties was examined.In the case of slow cooling in the furnace,TiC was found to form mostly along the grain boundaries for the 5 vol%samples.With the increase of TiC reinforcements,fibrous TiC appeared and extended into the matrix,leading to an increase in hardness.The ultimate tensile strength of the composites shows a marked variation with increasing TiC content;that is,425.6 MPa(matrix),372.8 MPa(5 vol%),550.4 MPa(10 vol%)and 334.3 MPa(15 vol%),while the elongation-to-failure(i.e.,ductility)decreases.The fracture pattern was found to transit from the ductile to cleavage fracture,as the TiC content increased.When the samples cooled rapidly in copper crucible,the TiC particles formed both along the grain boundaries and within the grains.With the increase of TiC volume fraction,both the hardness and ultimate tensile strength of the resulting composites improved steadily while the elongation-to-failure declined.Therefore,the fast cooling can be used to drastically improve the strength of in-situ TiC reinforced CoCrFeNi.For example,for the 15 vol%TiC/CoCrFeNi composite cooled in the copper crucible,the hardness and ultimate tensile strength can reach as high as 595 HV and 941.7 MPa,respectively. | Jifeng Zhang Ting Jia Huan Qiu Heguo Zhu Zonghan Xie | 2020 | Journal of Materials Science & Technology2020，42，7： | 6 |
| 2 | The automorphism group of a generalized extraspecial p-group显示文摘In this paper, the automorphism group of a generalized extraspecial p-group G is determined, where p is a prime number. Assume that |G| = p 2n+m and |ζG| = p m , where n 1 and m 2. (1) When p is odd, let Aut G G = {α∈ AutG | α acts trivially on G }. Then Aut G G⊿AutG and AutG/Aut G G≌Z p-1 . Furthermore, (i) If G is of exponent p m , then Aut G G/InnG≌Sp(2n, p) × Z p m-1 . (ii) If G is of exponent p m+1 , then Aut G G/InnG≌ (K Sp(2n-2, p))×Z p m-1 , where K is an extraspecial p-group of order p 2n-1 . In particular, Aut G G/InnG≌ Z p × Z p m-1 when n = 1. (2) When p = 2, then, (i) If G is of exponent 2 m , then AutG≌ Sp(2n, 2) × Z 2 × Z 2 m-2 . In particular, when n = 1, |AutG| = 3 · 2 m+2 . None of the Sylow subgroups of AutG is normal, and each of the Sylow 2-subgroups of AutG is isomorphic to H K, where H = Z 2 × Z 2 × Z 2 × Z 2 m-2 , K = Z 2 . (ii) If G is of exponent 2 m+1 , then AutG≌ (I Sp(2n-2, 2)) × Z 2 × Z 2 m-2 , where I is an elementary abelian 2-group of order 2 2n-1 . In particular, when n = 1, |AutG| = 2 m+2 and AutG≌ H K, where H = Z 2 × Z 2 × Z 2 m-1 , K = Z 2 . | Liu HeGuo Wang YuLei | 2010 | Science China Mathematics2010，53，2： | 6 |
| 3 | Characterization of β-defensin 42 expressed in principal cells at the initial segment of the rat epididymis显示文摘优先地在男繁殖的道表示的 -defensins, 特别地在有区域特定的模式的睾丸和 epididymis,在天生的免疫和精子富饶起一个重要作用。在 epididymis 的头区域表示了, -defensins 被知道了贡献天生的免疫,精子活动性开始,和维护。然而,起始的区域遗体到的 -defensins 是 uncharacterized。在这研究,老鼠 -defensin (Defb42 ) 42 被揭示只在老鼠 epididymis 和它的精子的 acrosome 的起始的片断位于主要房间。而且, Defb42 的表示依赖于钠阴囊的因素和发展阶段。recombinant Defb42 是主要不对 Candida albicans,但是对 Escherichia coli 和葡萄球菌 aureus 的抗菌剂。把调查结果基于这些, Defb42 被建议在老鼠 epididymis 在精子富饶和主人防卫起一个双作用。 | Aijie Xin Yue Zhao Heguo Yu Huijuan Shi Hua Diao Yonglian Zhang | 2015 | Acta Biochimica et Biophysica Sinica2015，47，11： | 2 |
| 4 | A MICROPAYMENT SCHEME BASED ON WEIGHTED MULTI-DIMENSIONAL HASH CHAIN显示文摘Hash chain and its generalization—Multi-Dimensional Hash Chain (MDHC) have been widely used in the design of micropayment due to its simplicity and efficiency. In this letter, a more efficient variant of MDHC, called WMDHC, which endows in the structure of MDHC a weight value for each hash value through a well-defined mapping, is proposed. The average hash operation number of WMDHC is log(2 m / t ),which is better than log( m )of MDHC when the parameter t is typically suggested as t = 7. | Liu Yining Hu Lei Liu Heguo | 2006 | Journal of Electronics(China)2006，23，5： | 2 |
| 5 | Lightweight Body-In-White Design Driven by Optimization Technology显示文摘Structural optimization technologies are increasingly applied to lightweight automotive structural design.In a body-inwhite(BIW)development project,optimization technologies are applied in three steps that are seamlessly integrated into engineering practice.By following a design-driven approach,an innovative design that was 50.65 kg lighter than the base design was achieved.First,topology optimization was used to investigate the optimal material distribution in a given design space,and helped in extracting the main load path,while considering crashworthiness,NVH,and static stiffness performance requirements.In the second step,the effective design of a beam cross-section and feasible joints was carried out based on optimization technology and expert knowledge.In this step,the deep involvement of manufacturing process experts on stamping and joint connection feasibility analysis increased the chance of success remarkably.The sensitivity analysis,topography optimization,and gauge optimization of the created draft 3D BIW frame comprised the last step before finalizing the initial design.The new design was validated by full load case simulations,including full vehicle crashworthiness analysis,mode frequency,and body mount point dynamic stiffness analysis,and BIW stiffness and component attachment stiffness analysis.The validation results indicate that the new BIW design achieves the performance goal,while being 13.3%lighter than the base design. | Heguo Ou Xiaodong Tang Jieping Xiao Yuanbo Wang Zhongmin Ma | 2018 | Automotive Innovation2018，1，3： | 2 |
| 6 | The maximal Merrifield-Simmons indices and minimal Hosoya indices of uaicyclic graphs显示文摘 | Zheng YAN Huiqingg LIU Heguo LIU | | 0，，01： | 1 |
| 7 | Wear properties of the composites fabricated by exothermic dispersion reaction synthesis in an Al-TiO2-B2O3 system显示文摘 | Zhu Heguo Wang Hengzhi | 2008 | Wear2008，264，： | 1 |
| 8 | Automorphism Groups of Some Finite p-Groups显示文摘 | Heguo Liu Yulei Wang | 2016 | Algebra Colloquium2016，23，4： | 1 |
| 9 | Soluble fusion expression, characterization and localization of humanβ-defensin 6显示文摘 | Aijie Xin Yue Zhao Heguo Yu Huijuan Shi Haiyan Liu Hua Diao Yonglian Zhang | 2014 | Molecular Medicine Reports2014，，1： | 1 |
| 10 | fabricated from A1-Ni2 03 system through microwave synthesis 显示文摘 | Zhu Heguo Guo Guanhong Cui Tao | 2015 | Mater Chem Phys2015，153，： | 1 |
| 11 | Automorphism groups of semidirect products显示文摘 | Zhou Fang Liu Heguo | | 0，，： | 1 |
| 12 | Study of the microstructure and mechanical properties of composites fabricated by the reaction method in an Al–TiO 2 –B 2 O 3 system显示文摘 | Heguo Zhu Hengzhi Wang Liangqi Ge Wenjuan Xu Yunzhan Yuan | 2007 | Materials Science & Engineering A2007，，： | 1 |
| 13 | Wearable membranes from zirconium-oxo clusters cross-linked polymer networks for ultrafast chemical warfare agents decontamination显示文摘The urgent need for immediate personal protection against chemical warfare agents(CWAs)spurs the requirement on robust and highly efficient catalytic systems that can be conveniently integrated to wearable devices.Herein,as a new concept for CWA decontamination catalyst design,sub-nanoscale,catalytically active zirconium-oxo molecular clusters are covalently integrated in flexible polymer network as crosslinkers for the full exposure of catalytic sites as well as robust framework structures.The obtained membrane catalysts exhibit high swelling ratio with aqueous content as 84 wt%and therefore,demonstrate quasi-homogeneous catalytic activity toward the rapid hydrolysis of both CWA,soman(GD)(t_(1/2)=5.0 min)and CWA simulant,methyl paraoxon(DMNP)(t_(1/2)=8.9 min).Meanwhile,due to the covalent nature of cross-linkages and the high flexibility of polymer strands,the membranes possess promising mechanical strength and toughness that can stand the impact of high gas pressures and show high permeation for both CO_(2)and O_(2),enabling their extended applications in the field of collective/personal protective materials with body comfort. | Litao Ma Jiamin Xie Xiaoshan Yan Zhiwei Fan Heguo Li Lin Lu Likun Chen Yi Xin Panchao Yin | 2022 | Chinese Chemical Letters2022，33，6： | 1 |
| 14 | In-situ synthe?sis and characterization of a hierarchically structured Al, 03 / AbTi composite显示文摘 | Zhu Heguo Jiang Yalin Yao Yinqun | 2013 | J Mater Sci2013，48，： | 1 |
| 15 | Reaction path?ways, activation energies and mechanical properties of hy?brid composites synthesized in-situ from A显示文摘 | Zhu Heguo Jiang Yalin Yao Yinqun | 2012 | Mater Chem Phys2012，137，2： | 1 |
| 16 | Microstructure and high temperature wear of the aluminum matrix composites fabricated by reaction from Al–ZrO 2 –B elemental powders显示文摘 | Heguo Zhu Cuicui Jia Jianliang Li Jun Zhao Jinzhu Song Yinqun Yao Zonghan Xie | 2011 | Powder Technology2011，，： | 1 |
| 17 | Influence of B/ZrO 2 molar ratios on the ambient temperature wear properties of composites made by an Al–ZrO 2 –B system显示文摘 | Heguo Zhu Jing Min Jianliang Li Jie Chen Jun Zhao Yinqun Yao | 2011 | Wear2011，，5： | 1 |
| 18 | Study on the reaction mechanism and mechanical properties of aluminum matrix composites fabricated in an Al–ZrO 2 –B system显示文摘 | Heguo Zhu Yanqun Yao Jianliang Li Shi Chen Jun Zhao Hengzhi Wang | 2011 | Materials Chemistry and Physics2011，，1： | 1 |
| 19 | Reaction mechanisms of the Ti C/Fe composite fabricated by exothermic dispersion from Fe-Ti-C element system显示文摘 | Zhu Heguo Dong Kang Wang Huan | 2013 | Powder Technology2013，246，： | 1 |
| 20 | In situ fabrication of (α-Al 2 O 3 +Al 3 Zr)/Al composites in an Al–ZrO 2 system显示文摘 | Heguo Zhu Jing Min Jianliang Li Yinglu Ai Liangqi Ge Hengzhi Wang | 2010 | Composites Science and Technology2010，，15： | 1 |
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