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Journal of Iron and Steel Research International 2022年第10期29卷 1683-1693页

作者： Ming-ming Wang xiu-hua Gao Li-ying Song ch.ng-lin Zhu Lin-xiu Du Raja Devesh Kumar Misra State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819LiaoningChina Laboratory for Excellence in Advanced Steel Research Department of MetallurgicalMaterials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX79968USA

Hydrogen trapping behavior of V–n microalloyed X80 pipeline steels was studied by means of hydrogen permeation and hydrogen induced cracking(HIC)*** addition,the electrochemical performance of the steels in 3.5 wt.%naCl solution was *** indicated that the microstructure of experimental steels mainly consisted of acicular ferrite and polygonal ferrite(PF).When the fraction of PF was 9.1%and 30.4%,hydrogen effective diffusion coefficient was 1.624×10^(−6) and 3.121×10^(−6) cm^(2)/s,*** pipeline steels were not susceptible to *** potential hydrogen traps distributed in homogeneous dispersion were conducive to high HIC *** increasing the fraction of PF from 9.1%to 30.4%,the corrosion current density increased from 5.39×10^(−6) to 9.49×10^(−6) A cm^(−2),the corrosion potential decreased from−0.48 to−0.57 V,and the charge transfer resistance decreased from 2301 to 2068Ωcm^(2),*** fraction of PF was disadvantageous for corrosion resistance because of galvanic corrosion.

关键词： Pipeline steel V-n microalloying Hydrogen induced cracking susceptibility Hydrogen permeation Electrochemical corrosion

Structure of Metal Aluminophosphates:Al_(9-x)M_xP_(12)O_(48)(TREn)_4·ynH_4·zH_2O [TREn=n(ch_2ch_2nH_3)H_m,M=Mn,Co]

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chemical Research in ch.nese Universities 2006年第1期22卷 1-5页

作者： XU Yao-hua LI Yong-xiu FEnG Shou-hua ch.n Xiao-feng JIn Hai-ying PAnG Wen-qin DUAn ch.n-ying YOU Xiao-zeng Coordination chemistry Institute State Key Laboratory of Coordination Chemistry Nanjing University Nanjing 210093 P. R. China College of chemistry Jilin University Changchun 130023 P. R. China Department of chemistry Nanchang University Nanchang 330047 P. R. China

Two large-pore metal-doped aluminophosphates, Mn4Al5（PO4 ）12[n（ C2H4nH3）3]3 [ n（C2H4nH3）2·（C2H4nH2）]（nH4）2·14H=O（Mn4-nJU） and Co4Al5（PO4）12[n（C2H,nH3）3][n（C2H4nH3）2（C2H4nH2）]3· （ nH4 ）4· 13H2O （ Co4-nJU） , which have the same open framework structures, were hydrothermally synthesized. The structures of these compounds consist of TO4 tetrahedra, which are linked together by corner-sharing to form an open framework with unique intersecting twelve-membered ring ch.nnels in three dimensions. The compounds crystallize in cubic space group I（-4）3m with α= 1. 6795（2） nm and V=4. 7374（9） nm^3 for Mn4-nJU, and a=1. 67372（19） nm and V = 4. 6887 （9） nm^3 for Co4-nJU, respectively. Single crystal structure analyses show that the protruding O atoms of the frameworks of the compounds are linked to protonated 4-（ 2-aminoethyl ）diethylenetriamine （TREn, C6H18n4 ） ions in the windows by means of hydrogen-bonding under the hydrothermal condition. It is also found that the components inside the super cages of the compounds are ch.ngeable, and the metal ions M^2＋（M = Mn, Co） and Al^3＋ disorderedly occupy the same crystallographic positions.

关键词： Phosphate TREn Transition metal Aluminophosphates Hydrothermal Synthesis

Application of Mix Optimization Scheduling Approach for Steelmaking Continuous Casting Process Based on Actual Steelmaking Industry

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Journal of Iron and Steel Research International 2013年第10期20卷 1-9页

作者： SUn Liang-liang WAnG xiu-ying State Key Laboratory of Synthetical Automation for Process Industries Northeastern University

The models, algorithms and implementation results of a computerized scheduling system were introduced for the steelmaking-continuous casting process （SCCP） of a steel plant in ch.na. The scheduling of SCCP in this plant required that each cast plan should be processed on time, the charges in the same cast should be processed con- tinuously on the same caster, and the waiting time of the charges which are in front of each caster cannot exceed the given threshold. At the same time, the processing time of charges cannot be conflicted mutually in the same convert- ers or refining furnaces. Based on the research background, a hybrid optimal scheduling approach and its application were discussed. Aiming at the main equipment scheduling, an optimal scheduling method was proposed which con- sisted of equipment assignment algorithm based on dynamic program （DP） technique and conflict elimination algo rithm based on linear program （LP） technique. The approach guarantees that the charges are continuously processed on the same caster. Meanwhile, the requirement for high temperature ladle can also be satisfied due to the ladle match.ng function. numerical results demonstrate solution quality, computational efficiency, and values of the mod els and algorithm.

关键词： schedule steelmaking process continuous casting process dynamic programming ladle scheduling

A new Approach to Ethyl 1-Aroyl/Aroylmethyl-5-methyl-3- methylthiopyrazole-4-carboxylates: High Regioselectivity in Alkylation and Acylation Reactions between n-1 and n-2 of a Pyrazole Derivative

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ch.nese chemical Letters 2005年第9期16卷 1161-1164页

作者： Li Rong WEn Gui Long ZHAO Ming LI Wen ying QI xiu Li ZHAnG Hua Zheng YAnG College of chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 State Key Laboratory of Elemento-organic chemistry Institute of Elemento-Organic Chemistry Nankai University Tianjin 300071 Ocean Food and Drug Institute Ocean University of China Qingdao 266003

Two series, totalizing twelve, of new compounds, ethyl 1-aroyl/aroylmethyl-5-methyl-3- methylthiopyrazole-4-carboxylates 5/6, have been synthesized via highly regioselective acylation and alkylation of ethyl 3-methyl-5-methylthio-1H- pyrazole-4-carboxylate 2a with aroyl chloride 3 and alpha-tosyloxysubstitutedacetophenones 4. Unexpected structures of the product have been unambiguously determined by both X-ray crystallographic analysis and 2D nMR.

关键词： Pyrazole regioselectivity X-ray crystallographic analysis 2D nMR

On the Convergence of Products _sh_1h_n in the Adams Spectral Sequence

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Acta Mathematica Sinica,English Series 2007年第6期23卷 1025-1032页

作者： xiu Gui LIU School of Mathematical Sciences and LPMC Nankai University Tianjin 300071 P.R. China

Abstract Let A be the mod p Steenrod algebra and S the sphere spectrum localized at p, where p is an odd prime. In 2001 Lin detected a new family in the stable homotopy of spheres which is represented by （b0hn-h1bn-1）∈ ExtA^3,（p^n＋p）q（Zp,Zp） in the Adams spectral sequence. At the same time, he proved that i.（hlhn） ∈ExtA^2,（p^n＋P）q（H^＊M, Zp） is a permanent cycle in the Adams spectral sequence and converges to a nontrivial element ξn∈π（p^n＋p）q-2M. In this paper, with Lin＇s results, we make use of the Adams spectral sequence and the May spectral sequence to detect a new nontrivial family of homotopy elements jj′j^-γsi^-i′ξn in the stable homotopy groups of spheres. The new one is of degree p^nq ＋ sp^2q ＋ spq ＋（s - 2）q ＋ s - 6 and is represented up to a nonzero scalar by hlhnγ-s in the E2^s＋2,＊-term of the Adams spectral sequence, where p ≥ 7, q = 2（p - 1）, n ≥ 4 and 3 ≤ s 〈 p.

关键词： stable homotopy groups of spheres Adams spectral sequence May spectral sequence

Development of a real-time RT-PCR method for the detection of newly emerged highly pathogenic H7n9 influenza viruses

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Journal of Integrative Agriculture 2017年第9期16卷 2055-2061页

作者： WAnG xiu-rong GU Lin-lin SHI Jian-zhong XU Hai-feng ZHAnG ying ZEnG Xian-ying DEnG Guo-hua LI ch.ng-jun ch.n Hua-lan State Key Laboratory of Veterinary Biotechnology Harbin Veterinary Research InstituteChinese Academy of Agricultural SciencesHarbin 150069P.R.China

In 2013, a human influenza outbreak caused by a novel H7n9 virus occurred in ch.na. Recently, the H7n9 virus acquired multiple basic amino acids at its hemagglutinin（HA） cleavage site, leading to the emergence of a highly pathogenic virus. The development of an effective diagnostic method is imperative for the prevention and control of highly pathogenic H7n9 influenza. Here, we designed and synthesized three pairs of primers based on the nucleotide sequence at the HA cleavage site of the newly emerged highly pathogenic H7n9 influenza virus. One of the primer pairs and the corresponding probe displayed a high level of amplification efficiency on which a real-time RT-PCR method was established. Amplification using this method resulted in a fluorescent signal for only the highly pathogenic H7n9 virus, and not for any of the H1–H15 subtype reference strains, thus demonstrating high specificity. The method detected as low as 39.1 copies of HA-positive plasmid and exhibited similar sensitivity to the virus isolation method using embryonated chicken eggs. Importantly, the real-time RT-PCR method exhibited 100% consistency with the virus isolation method in the diagnosis of field samples. Collectively, our data demonstrate that this real-time RT-PCR assay is a rapid, sensitive and specific method, and the application will greatly aid the surveillance, prevention, and control of highly pathogenic H7n9 influenza viruses.

关键词： H7n9 highly pathogenic influenza virus real-time RT-PCR

A note on the Mean Value of numbers of the Solutions of x~α=1(mod n)

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Acta Mathematica Sinica,English Series 2004年第6期20卷 1095-1102页

作者： xiu Yuan YU Department of Mathematics Hangzhou Teachers' College Department of Mathematics Quzhou College

Let T=T(p,q,α) be the number of solutions of the congruence x~α≡1 (rood p^nq~θ).Let A and B be sets of primes satisfying x_1nd y_1n value estimation of (?)∑_(p∈A)∑_(q∈B) logT... 详细信息

Let T=T(p,q,α) be the number of solutions of the congruence x~α≡1 (rood p^nq~θ).Let A and B be sets of primes satisfying x_1nd y_1n value estimation of (?)∑_(p∈A)∑_(q∈B) logT (p,q,α) is given.

关键词： Congruence number of solutions Mean value

Synthesis and Crystal Structure of a Co(Ⅱ) Complex with Taurine-5-methyl-2-hydroxyisophthalaldehyde Schiff Bases [Co(C_(13)H_(16)n_2O_7S_2)(H_2O)_3]_2·H_2O

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ch.nese Journal of Structural chemistry 2008年第2期27卷 205-209页

作者： QIn xiu-ying JIAnG Yi-Min ZHAnG Shu-Hua MO Qian-Qun College of chemistry and chemical Engineering Guangxi Normal University Guilin Guangxi 541004 China College of Pharmacy Guilin Medical College Guilin Guangxi 541004 China

The title complex [CoL（H20）3]2·H2O （C26H46n4O21S4CO2）, where L = taurine-5- methyl-2-hydroxyisophthalaldehydes, has been synthesized and characterized by IR and X-ray diffraction analysis. The crystal of the complex belongs to the triclinic system, space group P1, with a = 11.197（4）, b = 13.309（5）, c = 14.486（5） ]A, a = 78.827（13）,β = 70.547（11）, γ = 81.058（13）°, Mr = 996.77, S = 1.08, V= 1987.2（13） A3, Z = 2, Dc = 1.666 g/cm3, F（000） = 1032,μ = 1.131 mm^-1, R = 0.0633 and wR = 0.1293. According to the structural analysis, the Co（ Ⅱ ） ion adopts a slightly distorted six-coordinated octahedral geometry. One n atom of the Schiff base of each molecule was hydrogenated to form hydrogen bond with O atom. Two coterminous molecules packed in one crystal water molecule are linked by intermolecular hydrogen bonds, thus generating an infinite chain constructed by hydrogen bonds.

关键词： cobalt(Ⅱ) complex taurine-5-methyl-2-hydroxyisophthalaldehydes crystal structure

Synthesis and in vitro activities on anti-platelet aggregation of n,n'-di(2-substituted-phenyl)-4-methoxyisophthalamides and benzene- 1,3-disulfonamides

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ch.nese chemical Letters 2011年第10期22卷 1139-1142页

作者： xiu Jie Liu Xin He ch.ng Ling Shi Jie Meng ying Lu Shao Hong Qiang Si Tao Hu The College of chemistry and chemical Engineering Tianjin University of Technology Tianjin 300384 China The College of Pharmaceutical Engineering Shenyang Pharmaceutical University Shenyang 110016 China

On the propose of search.ng for the SAR and obtaining novel antiplatelet aggregating drugs,we have described the synthesis procedure and the activities in vitro on antiplatelet aggregation of two series of derivatives,which contain both 18 n.n＇-di（2- substitutedphenyl）-4-methoxyisophthalamides（2a-2r） of the 2 series and nine n,n＇-di（2-substitutedphenyl）-4-methoxybenzene- 1,3-disulfonamides（3a-3i） of the 3 *** results showed that three compounds 2e,2i and 3g emerged as significant activities of antiplatelet aggregation,superior to two reference drugs picotamide and aspirin,and eight compounds 2j,2k,21,2o,2p,2q,2r and 3i merely superior to *** preliminary SAR shows that it is favorable for the 2 series to increase the activities via the steric hindrance substituents attached to the two side chain benzene rings at *** the arylamides of the 2 series have better the activity values than the arylsulfonamides of the 3 series respective except for 3b and *** the contrary,electrostatic factors would not contribute evidently to the activities of the two *** structures of 15 compounds newly synthesized have been established by MS and ~1H nMR and been first reported in this paper.

关键词： Synthesis Anti-platelet aggregating Isophthalamides Benzene-1 3-Disulfonamides

On hot deformation behavior and workability characteristic of 42CrMo4 steel based on microstructure and processing map

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Journal of Iron and Steel Research International 2023年第3期30卷 537-547页

作者： Min Qi Hong-yan Wu ying Dong Lin-xiu Du State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819LiaoningChina

In order to determine the safe region of 42CrMo4 steel during hot working and obtain excellent workability,the hot deformation behavior at the temperatures of 850-1150℃and the strain rates of 0.01-10 s^(-1)was investigated through single-pass compression test of *** observing and analyzing the true stress-strain curves,the conclusion may be drawn that the flow stress value increases with the decrease in deformation temperature and the increase in strain *** temperature and reducing strain rate are conductive to dynamic recrystallization(DRX)nucleating and growing,but adiabatic heating caused by higher strain rate can also promote *** the Zener-Hollomon(Z)value and dynamic recrystallized grain size(D_(DRX))have completely opposite trends with deformation condition parameters,the expression of Z value and DDRX can be determined as:D_(DRx)=15,567.645Z^(-02174).The processing map and instability map constructed at a strain of 0.9 show that the suitable window for hot working with a true strain of 0.9 is in the temperature range of 970-1150℃and strain rate range of 0.01-0.25 s^(-1),as well as at the temperature of 1150℃ and strain rate range of 0.25-10 s^(-1).The instability phenomenon appears in the process interval of 850-1096℃ and 0.22-10 s^(-1).

关键词： Hot deformation behavior Dynamic recrystallization Microstructure evolution Constitutive relationship Processing map