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Effects of molybdenum on the microstructure and mechanical properties of Ti(C,N)-based cermets with low Ni

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Rare Metals 2006年第1期25卷 90-95页

作者： WANG Saiyu XIONG Weihao YAN Mingshuang FAN Chou The Stale Key Laboratory for Die ＆ Mould Technology Huazhong University of Science and Technology Wuhan 430074 China huangshi Institute of Technology Huangshi 435003 China

The effects of Mo on the microstructure and mechanical properties of Ti（C,N）-based cermets with low Ni have been studied systematically. Different contents of Mo （4-12 wt.%） were added into Tl（C,N）-based cermets. Specimens were fabricated by conventional powder metallurgy and vacuum sintered at temperatures of 1440, 1450, and 1460℃ individually. The microstructure and fracture morphology were investigated by scanning electron microscope, and the mechanical properties such as transverse strength and hardness were measured. The results show that the microstructure is uniform and the thickness of rim phase is moderate when the content of Mo is 8 wt.%; the mechanical properties of the specimens sintered at 1450℃ are better than those sintered at 1440 and 1460℃. The integrated properties of transverse strength and hardness are the best when the content of Mo is 8 wt.% and the sintering temperature is 1450℃.

关键词： Ti(C,N)-based cermets microstructttre mechanical properties Mo content

On the Structure of Cyclic Codes over F_q+uF_q+vF_q+uvF_q

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Wuhan University Journal of Natural Sciences 2011年第5期16卷 457-460页

作者： XU Xiaofang LIU Xiusheng School of Mathematics and Physics Huangshi Institute ofTechnology Huangshi 435003HubeiChina

In this paper, cyclic codes over the ring R = F ＋ uF ＋ vF ＋ uvF are discussed where the ring R is not a finite chain ring. By studying the polynomial ring Kn = （F ＋ uF ＋ vF ＋ uvF ）[x] / （x^n -1）and using the corresponding relationship between the cyclic codes in R and the ideals in Kn , cyclic codes over the ring R are characterized. Finally, a Gray-map is obtained and the image of cyclic codes in R is characterized.

关键词： cyclic codes gray-map quasi-cyclic code

Application of Fourier Slice Theorem in Wigner Operator Theory and New Complete Representation

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Communications in Theoretical Physics 2009年第11期52卷 829-831页

作者： WANG Tong-Tong~1 and FAN Hong-Yi~(2,3)1 School of Mathematics and Physics, huangshi Institute of Technology, huangshi 435003, China2 Department of Material Science and Engineering, University of Science and Technology of China, Hefei 230026, China3 Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, China School of Mathematics and Physics Huangshi Institute of Technology Huangshi 435003 China Department of Material Science and Engineering University of Science and Technology of China Hefei 230026 China Department of Physics Shanghai Jiao Tong University Shanghai 200030 China

By applying the Fourier slice theorem,S;（λ）=∫;P;（t）e;=F（λcosθ,λsinθ）,where P;（t）is aprojection of f（x,p）=（?）F（u,v）e;dudv along lines of constant,to the Wigner operator we are naturally led toa projection operator（pure state）,which results in a new complete *** Weyl orderimg formalism of theWigner operator is used in the derivation.

关键词： Wigner operator Fourier slice theorem new complete representation

Synthesis and Crystal Structure of 1,6:3,4-Bis(1,2-xylyiene) tetrahydro-imidazo[4,5-d]imidazole-2,5(1H,3H)-dione

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Semiconductor Photonics and Technology 2010年第4期16卷 162-166页

作者： LIU Hongxia, CAI Wei, LI Qiong (School of Environmental Science and Engineering, huangshi Institute of Technology, huangshi 435003, CHN) School of Environmental Science and Engineering Huangshi Institute of Technology Huangshi 435003

The compound 1,6∶3,4-Bis(1,2-xylyiene)tetrahydro-imidazo[4,5-d]imidazole-2,5(1H,3H)-dione(C20H18N4O2, Mr=346.38) has been synthesized for the first time. Complete assignments were achieved by 1H NMR, IR, EI-MS, elemental analysis and single-crystal X-ray diffraction technique. The crystal belongs to monoclinic, space group P2(1)/n with a=10.266 0(16), b=11.298 5(18), c=1.452 20(20) nm, β=97.923(3), V=1.668 4(5) nm3, Z=4, Dc=1.379 g/cm3, μ(MoKα)=0.092 mm-1, F(000)=728, R=0.053 2 and wR=0.112 3 for 3632 observed reflections with I>2σ(I). X-ray analysis reveals dimeric aggregates are formed through hydrogen bond and offset π-π stacking. In addition, the compound assembles to a three-dimensional networking structure by other hydrogen bond.

关键词： crystal structure glycoluril synthesis

Effect of Annealing Temperature on the Ferroelectric Properties of BiFeO_3 Thin Films Prepared by Sol-gel Process

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Journal of Wuhan University of Technology(Materials Science) 2010年第3期25卷 384-387页

作者：王秀章 Hubei Key Laboratory of Pollutant Analysis & Reuse Technology School of Computer Science and Technology Huangshi Institue of Technology

Sol-gel process was adopted to prepare BiFeO3 ***3 films were deposited on LaNiO3 coated Si（100） substrates annealed at 500 and 550 ℃,*** X-ray diffraction results reveal that BiFeO3 film has a rhombohedrally distorted perovskite structure with space group *** film annealed at 500 ℃ has larger remnant polarization（Pr） of 35.3 μC/*** the film annealed at 550 ℃,smaller remnant polarization of Pr=4.8 μC/cm^2 is observed for its low breakdown electric *** leakage conduction is observed in the film annealed at 500 ℃ at low applied field.

关键词： multiferroics BiFeO3 thin film sol-gel method ferroelectricity dielectric property

Fabrication and Thermally Sensitive Properties of VOx Thin Films by Sol-Gel Method

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稀有金属材料与工程 2006年第S3期 559-560页

作者： Shenglin Jiang~1 Bowu Yan~(1,2) Dongxiang Zhou~1 Meidong Liu~1 (1.Department of Electronic Science & Technology,Huazhong University of Science & Technology,Wuhan 430074,China) (2.huangshi Institute of Technology,huangshi 435003,China)

For the high temperature coefficient of resistivity （TCR） of VOxthin films,the preparation process including the heat-treating and the application of seed layer,has been *** the films were prepared without a seed layer, heated in air for 2 h,and then in N2for 2 h at 470℃,the TCR of about 1.07% K-1(3.75% K-1at 45℃～65℃) was *** R20℃/R100℃was about 28.75,while the R20℃/R100℃of the thin films prepared on a seed layer was *** X-ray diffraction （XRD） showed that better heating conditions led to less phase compositions and higher V2O5diffraction peak,which led to higher *** experiment results showed that the optimum heating condition was at 470℃for 4 h.

关键词： VO_x thin films sol-gel method TCR

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矩阵代数的稳定子范数

山西大学学报(自然科学版) 2010年第1期33卷 37-40页

作者：刘修生黄石理工学院数理学院

设f是矩阵代数Fn×n(F为复数域C或实数域R)的非空子集S的子范数.如果满足A∈S存在正常数σ,使得f(Am)≤σf(A)m,m=1,2,…,则称f为S上的一个稳定子范数.借助S上的子范数f的特性,给出了与f的表达式有关的子范数g的稳定性的三个定理.

关键词：子范数稳定子范数幂提升

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铸人象神与三星堆文化的张扬之美

武汉大学学报（人文科学版） 2009年第5期62卷 582-586页

作者：李社教黄石理工学院武汉大学

三星堆文化中最能引起轰动效应的、最有地域文化特征的是其风貌独特的"人像群",目前研究者认为它是出于巫术祭祀的宗教目的、服务于神人交通的主题的看法并未揭示其更深层次的意蕴。从其表现内容、表现形式等方面考察,"人像群"还意味着... 详细信息

三星堆文化中最能引起轰动效应的、最有地域文化特征的是其风貌独特的"人像群",目前研究者认为它是出于巫术祭祀的宗教目的、服务于神人交通的主题的看法并未揭示其更深层次的意蕴。从其表现内容、表现形式等方面考察,"人像群"还意味着古蜀人的自我意识开始觉醒,是古蜀人用人的尺度建构艺术世界,通过人物造型的艺术符号借神扬人的尝试。人的张扬是潜藏于"人像群"中的理性内核,使之在审美风貌上表现为"张扬之美"。

关键词：三星堆文化人像造型

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投标施工组织设计编制方法初探

施工技术 2007年第S1期36卷 463-464页

作者：石国林黄石理工学院湖北黄石435003

投标施工组织设计是工程投标文件中的一项关键内容,对竞标人能否在竞争中胜出至关重要。作者根据多年参与竞标工作的实践经验,阐述了编制投标施工组织设计的方法和要点。

关键词：投标施工组织设计编制方法