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冲裁断面质量对外缘翻边开裂影响的试验研究

锻压技术 2025年第1期50卷 108-112页

作者：李慧远宋建新黄赓宋霄鹰张坤龙广州JFE钢板有限公司

针对某DP980超高强钢汽车零件在正常冲压生产一段时间后出现的翻边开裂的问题，通过对冲裁模具刃口打磨再次实现正常生产，针对此现象，开展冲裁断面质量对外缘翻边开裂影响的试验研究。通过外形精度、断面轮廓和断面形貌等对比试验发... 详细信息

针对某DP980超高强钢汽车零件在正常冲压生产一段时间后出现的翻边开裂的问题，通过对冲裁模具刃口打磨再次实现正常生产，针对此现象，开展冲裁断面质量对外缘翻边开裂影响的试验研究。通过外形精度、断面轮廓和断面形貌等对比试验发现，发生翻边开裂的冲裁件的断面质量比翻边正常的冲裁件差，表明冲裁断面质量不好是造成翻边开裂的直接原因。采用研磨机对开裂批次的冲裁试样进行打磨，然后进行冲压测试，发现不再出现翻边开裂问题，再次证明提高冲裁断面质量可以解决翻边开裂问题。研究对车用超高强钢零件冲压厂具有一定的实践指导意义。

关键词： DP980超高强钢冲裁断面质量外缘翻边开裂

Study on Performance of Wireless Multihop Networks Using MIMO MRC and MIMO MRT

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China Communications 2007年第2期4卷 64-68页

作者： Ye Xinrong song jianxin Nanjing Univ Posts & Telecommun Coll Telecommun & Informat Engn Nanjing 210003 Peoples R China

This paper presents the concepts of completely connected network,mean path length and cluster for analysis performance of wireless multihop network,where matrix are used to express topology of network and use a new algorithm to compute the number of cluster in the ***-input/multiple-output(MIMO) communication promises performance enhancement over conventional single-input/single-output(SISO) technology for the same radiated power,if leveraged in multihop network,MIMO may be able to provide significant network performance improvement in network robustness and in power consumption,this paper analyzes three types of multihop networks employing SISO, MIMO with maximum ratio combining(MRC) and MIMO with maximum ratio transmission(MRT) as link model respectively,and get that using MIMO link model can increase robust,decrease mean path length by simulation.

关键词： multiple-input/multiple-output(MIMO) wireless multihop network maximum ratio combining(MRC) maximum ratio transmission(MRT) single-input/single-output(SISO)

Synthetic porphyrin chemistry in China

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Science China Chemistry 2018年第5期61卷 511-514页

作者： Chengjie Li Junlong Zhang jianxin song Yongshu Xie Jianzhuang Jiang Key Laboratory for Advanced Materials and Institute of Fine Chemicals Shanghai Key Laboratory of Functional Materials Chemistry School of Chemistry & Molecular Engineering East China University of Science & Technology Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular Engineering Peking University Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) Key Laboratory of Application and Assemble of Organic Functional Molecules Hunan Normal University Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials Department of Chemistry University of Science and Technology Beijing

Porphyrins are a class of heterocyclic macrocycles,containing four pyrrolic subunits interconnected at theα-positions with four methine（=CH-）groups.

关键词： In Figure Synthetic porphyrin chemistry in China NIR OC DDQ

Mg-induced g-C_(3)N_(4) synthesis of nitrogen-doped graphitic carbon for effective activation of peroxymonosulfate to degrade organic contaminants

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Chinese Chemical Letters 2022年第6期33卷 3113-3118页

作者： Jihong Xu jianxin song Yulin Min Qunjie Xu Penghui Shi Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power Shanghai University of Electric PowerShanghai 200090China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200090China

The nitrogen-doped carbon derived from graphitic carbon nitride(g-C_(3)N_(4))has been widely deployed in activating peroxymonosulfate(PMS)to remove organic ***,the instability of g-C_(3)N_(4)at high temperature brings challenges to the preparation of *** nitrogen-doped graphitic carbon nanosheets(N-GC750)were synthesized by magnesium thermal *** undergoes the displacement reaction with small molecules produced by the pyrolysis of g-C_(3)N_(4),thereby effectively fixing carbon on the in-situ template of Mg_(3)N_(2)and avoiding direct product volatilization.N-GC750 exhibited excellent performance during the PMS activation process and bisphenol A(BPA,0.2 g/L)could be thoroughly removed in 30 min.A wide range of pH(3–11),temperature(10–40℃)and common anions were employed in studying the impact on ***,N-GC750 showed satisfactory reusability in cycle tests and promising applicability in real water *** experiments and electron paramagnetic resonance(EPR)measurements indicated that singlet oxygen was the main active species coupled with partial electron transfer in N-GC750/PMS ***,the oxidation products were identified,and their ecotoxicity was *** work is expected to provide a reference for the feasibility of preparing g-C_(3)N_(4)derived carbon materials and meaningful for PMS activation.

关键词： Mg-induced Graphene PMS activation Nonradical process Bisphenol A Toxicity

β to β Terpyridylene-bridged porphyrin nanorings

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Chinese Chemical Letters 2018年第1期29卷 99-101页

作者： Bangshao Yin Xu Liang Weihua Zhu Ling Xu Mingbo Zhou jianxin song Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) Key Laboratory of the Assembly and Application of Organic Functional Molecules Hunan Normal University School of Chemistry and Chemical Engineering Jiangsu University

6,6＂-Terpyridylene bridged cyclic porphyrin dimer 2Ni, trimer 3Ni, tetramer 4Ni and pentamer 5Ni were obtained through Suzuki-Miyaura coupling reaction of/~,jB＇-diboryl Ni（II） porphyrin with 6,6＂-dibromo- 2,2＇：6＇,2＂-terpyridine. Free base porphyrin nanorings 2H-SH were obtained by demetallation of 2Ni-SNi with sulfuric acid in CHCI3 and then were converted into 2Zn-SZn upon treatment with Zn（OAc）2 in quantitative yields, respectively. All of these newly synthesized porphyrin nanorings were characterized by high-resolution mass spectrometry and 1H NMR spectroscopy. The photophysical properties of porphyrin nanoring were examined by UV-vis and fluorescence spectra. The electrochemical properties of 2Ni-SNi were investigated by cyclic voltammetry and differential pulse voltammetry. The UV-vis absorption spectra and fluorescence spectra of these cyclic porphyrin arrays indicate that there exist unique electronic interactions between the constituent porphyrin units in each ring. Electrochemical analysis shows that the trimer 3Ni exhibit different redox behavior, which indicate that the porphyrin units in 3Ni are presumably more coplanar than in other cyclic oorohvrin arrays.

关键词： Crossing-couplingTerpyridineNanoringPorphyrinPhotophysical properties

Nitrogen-bridged Ni(Ⅱ)porphyrinoid trimers with a central quinodiimine unit

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Chinese Chemical Letters 2022年第10期33卷 4545-4548页

作者： Kaisheng Wang Boyu Xiao Ling Xu Mingbo Zhou Takayuki Tanaka Atsuhiro Osuka jianxin song College of Chemistry and Chemical Engineering Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research(Ministry of Education of China)Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceHunan Normal UniversityChangsha 410081China Department of Chemistry Graduate School of Science Kyoto UniversityKyoto 606-8502Japan

Buchwald-Hartwig amination of 5,15-dibromo and 5,10-dibromo Ni(Ⅱ)porphyrins with 5-amino Ni(Ⅱ)porphyrin gave linear and bent trimers 4Ni and 5Ni with a central quinodiimine-type Ni(Ⅱ)*** structures of 4Ni and 5Ni have been confirmed by X-ray diffraction analysis in both *** formation of unusual products 4Ni and 5Ni has been ascribed to facile oxidation of 5,15-and 5,10-amino Ni(Ⅱ)porphyrin *** of 4Ni and 5Ni under proper conditions gave NH-bridged Ni(Ⅱ)porphyrin trimers 4Ni-2H and 5Ni-2H in high *** 4Ni and 5Ni exhibit the lowest energy band as compared with 4Ni-2H and *** the bent trimer 5Ni exhibits a broad absorption tail beyond 1400 nm.

关键词： Porphyrinoid trimer Aminoporphyrins Buchwald-Hartwig amination Reduction Charge transfer

Multi-(phenylthio)porphyrinato Ni(Ⅱ) compounds: Synthesis,structures and properties

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Chinese Chemical Letters 2021年第8期32卷 2562-2566页

作者： Peipei Jiang Tingting Zhao Jian Rong Bangshao Yin Yutao Rao Mingbo Zhou Ling Xu jianxin song College of Chemistry and Chemical Engineering Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research(Ministry of Education of China)Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceHunan Normal UniversityChangsha 410081China

A series of multi-(phe nylthio)porphyrinato Ni(Ⅱ) compounds were synthesized without the participation of transition metal *** of these products were well characterized by 1 H NMR,13C NMR and *** of three typical compounds were further confirmed by X-ray single crystal *** red shifts were observed in UV-vis absorption spectra of multi-(phenylthio)porphyrinato Ni(Ⅱ) compounds which meet well with the electrochemical *** calculation indicates that the phenylthio groups have strong effects on the frontier orbitals of these *** order of a_(1u)-like and a_(2u)-like orbitals mainly distributed in porphyrin moiety is often inversed in energy when multiphenylthio groups are attached.

关键词： Phenylthio Porphyrin SNAr reaction a1u/a2u orbital

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某车型防火墙总成隔声性能的优化改进

汽车工艺与材料 2025年第2期 47-52页

作者：刘秀影王宇黄忠华宋建新朱琳赵飞北汽福田汽车股份有限公司工程研究总院北京102206

前围内隔音垫是汽车防火墙总成的重要隔音部件,研究了不同的前围内隔音垫材料、覆盖率、软层厚度分布、过孔本体隔声、附件安装工艺特征等对防火墙总成隔声性能的影响。通过选取合适的材料组成及软层厚度、提高隔音垫覆盖率、提高过孔... 详细信息

前围内隔音垫是汽车防火墙总成的重要隔音部件,研究了不同的前围内隔音垫材料、覆盖率、软层厚度分布、过孔本体隔声、附件安装工艺特征等对防火墙总成隔声性能的影响。通过选取合适的材料组成及软层厚度、提高隔音垫覆盖率、提高过孔本体隔声、降低泄漏量等手段实现对某车型防火墙总成隔声性能的优化改进。

关键词：防火墙总成隔声量前围内隔音垫

Ligustrazini Inhibits Endotoxin Induced PAI-1 Expression in Human Umbilical Vein Endothelial Cells

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2001年第1期21卷 6-7,16页

作者：阮秋蓉邓仲端宋建新 Department of Pathology School of Basic Medical Sciences Tongji Medical CollegeHuazhong University of Science and Technology Department of Infectious Disease Tongji Hospital Tongji Medical College Huazhong University of Science and Technology

Plasminogen activator inhibitor 1 (PAI 1) is one of important coagulant factors. Endotoxin lipopolysaccharide (LPS) induces thrombosis by stimulating PAI 1 secretion of vascular cells (EC). Using sandwich enzyme linked immunosorbent assay (ELISA) and Northern blot, was investigated the effects of Chinese medicine ligustrazini on PAI 1 expression in EC and LPS stimulated EC. The results showed that ligustrazini inhibited both basal and LPS induced PAI 1 mRNA expression in EC. The effect of ligustrazini on LPS induced PAI 1 secretion worked in a dose dependent manner. This study provided theoretic and experimental evidence for use of ligustrazini against septic shock and cardiovascular diseases.

关键词： ligustrazini PAI 1 lipopolysaccharide endothelial cells shock