检索结果-南通市图书馆

Science China(Technological Sciences) 2012年第9期55卷 2416-2419页

作者： FAN XingDu men he MA AiBin SheN BaoLong College of Mechanics and Materials Hohai UniversityNanjing 210098China Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Material Technology&EngineeringChinese Academy of SciencesNingbo 315201China

In this study, the soft magnetic properties and crystallization behavior of Fes3B10C6-xSixCul （x=0-4） nanocrystalline alloys prepared by annealing the melt-spun amorphous ribbons have been investigated. It is found that in the Fe83B10C6-xSixCU1 alloy system, the coercivity （Hc） decreases slightly with increasing Si addition and exhibits a minimum value with composition of x = 2, while the effective permeability （Ue） shows an opposite variation trend. The saturation magnetic flux density （Bs） shows a slightly decreasing trend owing to the decreasing volume fraction of nanocrystalline phase. The Fe83B10CaSi2Cu1 nanocrystalline alloy exhibits excellent soft magnetic properties with a high Bs of 1.78 T, high ue of 13 600 and low Hc of 4 A/m.

关键词： soft magnetic alloy Fe-based nanocrystalline alloy high saturation magnetic flux density low coercivity

FePCCu nanocrystalline alloys with excellent soft magnetic properties

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Science China(Technological Sciences) 2012年第12期55卷 3419-3424页

作者： JIN YunLong FAN XingDu men he LIU XinCai SheN BaoLong Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Material Technology&EngineeringChinese Academy of SciencesNingbo 315201China The School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315201China

The effect of Cu addition on crystallization behavior and soft magnetic properties of Fe84-xP10C6Cux （x = 0-1.15） alloys was investigated. Low-cost FePCCu nanocrystalline alloys dispersed with ct-Fe phase with an average grain size of 15-35 nm were obtained by appropriately annealing the melt-spun ribbons at 683 K for 5 min. The Fe83.25P10C6Cu0.75 nanocrystalline alloy ex- hibits a high Bs of 1.65 T, low Hc of 3.3 A/m and high μc at 1 kHz of 21 100, which is superior to the traditional FePC soft magnetic alloys. The core loss is as low as 0.32 W/kg at 1.0 T and 50 Hz, which is 60% that of nonoriented Fe 6.5 mass% Si-steel. It is encouraging to synthesize this Fe-based nanocrystalline alloy with excellent soft-magnetic properties even using commercially industry-grade raw materials, which is promising for the future industrial applications.

关键词： soft magnetic ahoy Fe-based nanocrystalline alloy soft magnetic properties low core loss

Effect of Ni addition on the glass-forming ability and soft-magnetic properties of FeNiBPNb metallic glasses

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Chinese Science Bulletin 2011年第36期56卷 3932-3936页

作者： WANG AnDing ZHANG MingXiao ZHANG JianHua men he SheN BaoLong PANG ShuJie ZHANG Tao Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology ＆ Engineering Chinese Academy of Sciences Ningbo 315201 China School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China

The effect of Ni addition on the glass-forming ability (GFA) and soft-magnetic properties of an (Fe1-xNix)75.5B14.5P7Nb3 (x=0-0.6) alloy system were investigated. We found that the addition of Ni was effective in allowing the alloy to approach a eutectic point as well as increasing the thermal stability of the supercooled liquid. By increasing the amount of Ni,the supercooled liquid region (ΔTx),the reduced glass transition temperature Trg (Tg/Tl) and the Y parameter [Tx/(Tg+Tl)] increased from 49 to 75 K,0.540 to 0.594 and 0.373 to 0.405,respectively. As a result,novel (Fe1-xNix)75.5B14.5P7Nb3 bulk metallic glass (BMG) rods with a maximum diameter of 1 mm were synthesized with a composition of x=0.5 and x=0.6 by copper mold casting. These metallic glasses have a moderate saturation magnetization of 0.37-1.20 T with good soft-magnetic properties,i.e. a low coercivity of 1.4-3.3 A/m and a high effective permeability of 13100-20900 at 1 kHz. The simultaneous achievement of a high GFA and good soft-magnetic properties for the FeNi-based alloy system is promising for the future development of BMGs.

关键词：大块金属玻璃玻璃形成能力软磁性能玻璃化转变温度合金系统饱和磁化强度过冷液相区有效渗透率

Interactions of Shear Bands in a Ductile Metallic Glass

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Journal of Iron and Steel Research International 2016年第1期23卷 48-52页

作者： Li-shan HUO Jun-qiang WANG Jun-tao HUO Yuan-yun ZHAO he men Chun-tao CHANG Xin-min WANG Run-wei LI Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology & EngineeringChinese Academy of Sciences Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology & EngineeringChinese Academy of Sciences

Shear bands play a key role in the plastic deformation of metallic glasses（MGs）.Even though there are extensive studies on the initiation and propagation of shear bands,the interactions among them have not been systematically studied *** interactions between the primary shear bands（PSBs）and secondary shear bands（SSBs）in a ductile Zr-based MG were *** residual stress near PSBs can deflect the propagation direction and reduce the propagation velocity of SSBs,which contributes to the plasticity and toughness of the *** was demonstrated that the probability and strength of the interactions between PSBs and SSBs would become stronger for MGs with larger Young′s modulus and smaller shear modulus,i.e.,larger Poisson′s *** results are valuable in understanding the plastic deformation of MGs and may be helpful in designing new MGs with desirable mechanical properties.

关键词： bulk metallic glass shear band interaction plasticity serration

USE OF CATION EXCHANGE RESIN IN SYNTheSIS OF N-SUBSTITUTED-1-AMINOALKANEPHOSPHONATE AND-PHOSPHINIC ACIDS

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Chinese Chemical Letters 1993年第3期4卷 203-204页

作者： Yue Hua ZHANG Wen Qiang HUANG Ai Ju men Bing Lin he Institute of Polymer Chemistry,Nankai University,Tianjin,300071

Strongly acidic cation exchange resin(1x1,H form)has been successfully used as a catalyst in synthesis of diphenyl N-benzyloxycarbonyl-1-aminobenzylphosphonate, N-benzyloxycarbonyl-1-aminobenzylphenylphosphinic acid a... 详细信息

关键词： Chen USE OF CATION EXCHANGE RESIN IN SYNTheSIS OF N-SUBSTITUTED-1-AMINOALKANEPHOSPHONATE AND-PHOSPHINIC ACIDS

Synthesis and Anion Recognition of A Novel Tetraamides Calix [4 ] (aza) crown

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有机化学 2003年第Z1期23卷 269-269页

作者： MEI Gong-Xiong men Ling-Zhi he Yong-Bing Department of Chemistry Wuhan University Wuhan 430072 Department of Chemistry Wuhan University Wuhan 430072 Department of Chemistry Wuhan University Wuhan 430072

　　Anion recognitions have attracted considerable attention in supramolecular chemistry because of its possible ap plication in the field of biology and environment. [1] In recent years, considerable efforts have bee... 详细信息

关键词： supramolecular chemistry

维普期刊数据库评论

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对图书馆自动化的反思

图书馆论坛 2005年第5期25卷 101-103,128页

作者：魏洛军三门峡市图书馆河南三门峡472000

以计算机为代表的自动化技术在图书馆的应用已是大势所趋,但在实践中也产生了一些负面效应,如片面强调技术的作用,忽视图书馆学基础理论的研究,甚至出现了“以技术代学术的倾向”。文章反思的并非是自动化本身, 而是“唯技术论”给图... 详细信息

以计算机为代表的自动化技术在图书馆的应用已是大势所趋,但在实践中也产生了一些负面效应,如片面强调技术的作用,忽视图书馆学基础理论的研究,甚至出现了“以技术代学术的倾向”。文章反思的并非是自动化本身, 而是“唯技术论”给图书馆学研究、图书馆工作可能带来的危害。

关键词：图书馆学自动化技术计算机

基于一维卷积神经网络和拉曼光谱的肺炎支原体菌株分类

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光谱学与光谱分析 2022年第5期42卷 1439-1444页

作者：赵勇何梦园王泊林赵荣孟宗燕山大学电气工程学院河北省测试计量技术及仪器重点实验室河北秦皇岛066004 燕山大学信息科学与工程学院河北省特种光纤与光纤传感重点实验室河北秦皇岛066004

肺炎支原体是造成人类呼吸系统疾病的主要原因。临床中,患者感染不同肺炎支原体症状极为相似,很难根据症状判别肺炎支原体类型并对症给药。因此,准确判别肺炎支原体菌株类型对于发病机理和疾病流行病学研究以及临床精准治疗具有重要意... 详细信息

肺炎支原体是造成人类呼吸系统疾病的主要原因。临床中,患者感染不同肺炎支原体症状极为相似,很难根据症状判别肺炎支原体类型并对症给药。因此,准确判别肺炎支原体菌株类型对于发病机理和疾病流行病学研究以及临床精准治疗具有重要意义。拉曼光谱具有快速、高效、无污染等优点,在生物医学领域逐渐得到越来越多研究者们的关注。一维卷积神经网络(1D-CNN)是一类包含卷积运算且具有深度结构的前反馈网络,在语音信号和振动信号分析等方面取得成功应用。提出一维卷积神经网络与拉曼光谱技术结合,针对肺炎支原体主要基因型M129型和FH型样本的拉曼光谱数据集,实现肺炎支原体菌株分类。利用光谱数据增强方法扩充原光谱数据集作为模型输入,训练一维卷积神经网络模型,解决由于小样本导致卷积神经网络数据饥渴问题;为了得到最好的肺炎支原体分类效果并加速学习过程,优化模型结构并确定最佳模型参数;拉曼光谱测量时常混有高斯噪声、泊松噪声和乘性噪声,为优化模型抗噪能力,将原光谱分别叠加高斯噪声、泊松噪声和乘性噪声,训练一维卷积神经网络模型并和LDA,KNN和SVM等传统算法进行比较。实验结果表明基于1D-CNN方法,对于叠加高斯噪声的光谱数据所建模型分类正确率为98.0%,叠加泊松噪声的光谱数据分类正确率为97.0%,叠加乘性噪声的光谱数据分类正确率为97.0%,分类正确率远高于基于LDA,KNN和SVM等传统算法所建模型分类正确率;同时构造叠加5,15,25,35,45和55 dBW不同强度噪声的光谱数据集,当噪声达到55 dBW时,1D-CNN模型仍能取得92.5%的分类正确率。因此,一维卷积神经网络结合拉曼光谱技术应用于肺炎支原体菌株类型分类是可行的,具有抗噪声能力强和分类正确率高的优点,该研究为肺炎支原体肺炎快速诊断提供新思路。

关键词：肺炎支原体拉曼光谱定性分类一维卷积神经网络

Synthesis and Anion Recognition of A Novel Tetraamides Calix [4] （aza） crown

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Synthesis and Anion Recognition of A Novel Tetraamides Calix...

第三届全国有机化学学术会议

作者： MEI, Gong-Xiong men, Ling-Zhi he, Yong-Bing ( Department of Chemistry , Wuhan University, Wuhan 430072 )

＜正＞ Anion recognitions have attracted considerable attention in supramolecular chemistry because of its possible application in the field of biology and environment . In recent years, considerable efforts have been devoted to the development of anion fluorescent and colorimetric *** have been proved to be useful building blocks for the design of artifical molecular receptors. Calixarenes bearing amide and urea have been demonstrat-

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综合方法在地热勘查中的应用

地质与勘探 2004年第Z1期40卷 41-44页

作者：何俊美何门贵广东省地质测量院广州510080 广东省地质物探工程勘察院广州510800

在广东沙田地热勘查中,采用地质测量、水文地质测量等方法基本查明了区内地质构造、水文地质特征,利用物探中电法、浅孔测温方法的成果结合地质构造和水文地质条件,比较全面地了解了区内地热赋存条件,对区内寻找地下热水有了新的认识.

关键词：地热勘查综合方法电法浅孔测温