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Aging Precipitates and Strengthening Mechanism of T122 Boiler Steel

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Journal of Iron and Steel Research International 2010年第2期17卷 67-73页

作者： bao han-sheng CHENG Shi-chang LIU Zheng-dong TAN Shu-ping Institute of Structure Materials Central Iron and Steel Research Institute Beijing 100081 China School of Astronautics Harbin Institute of Technology Harbin 150001 Heilongjiang China

T122 steel has been used to produce superheater or reheater of ultra supercritical boilers. With the help of chemical phase extraction and mierostructure characterization, the performance of aging precipitates of T122 steel, such as M23C6 carbide, Laves phase and MX phase was investigated, the strengthening mechanism of the steel was discussed, and the thermal yield stress of lath substructure, dislocations and precipitates of the steel were calculated. It was found that lath substructure and dislocations dominated the strengthening attribution and precipitation hardening went second to the strengthening attribution.

关键词： T122 heat resistant steel strengthening precipitate substructure dislocation

Cylindrical spiral triboelectric nanogenerator

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Nano Research 2015年第10期8卷 3197-3204页

作者： Xiao Hui Li Chang bao han Li Min Zhang Zhong Lin Wang BeijingInstituteofNanoenergyandNanosystems ChineseAcademyofSciencesBeijing100083China SchoolofMaterialScienceandEngineering GeorgiaInstituteofTechnologyAtlantaGeorgia30332USA

In recent years, triboelectric nanogenerators have attracted much attention because of their unique potential in self-powered nanosensors and nanosystems. In this paper, we report a cylindrical spiral tdboelectric nanogenerator （S-TENG）, which not only can produce high electric output to power display devices, but also can be used as a self-powered displacement sensor integrated on a measurement ruler. At a sliding speed of 2.5 m/s, S-TENG can generate a short-circuit current （Isc） of 30 μA and an open-circuit voltage （Voc） of 40 V. As the power source, we fabricate a transparent and flexible hand-driven S-TENG. Furthermore, we demonstrate a self-powered S-TENG-based measuring tapeline that can accurately measure and display the pulled-out distance without the need for an extra battery. The results obtained indicate that TENG-based devices have good potential for application in self-powered measurement systems.

关键词： triboelectricnanogenerator self-powering displacement sensor

《港口工程荷载规范》船舶水流力计算公式的修正方法

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中国港湾建设 2024年第9期44卷 1-7,87页

作者：刘军其戈龙仔李焱陈汉宝中交一航局第一工程有限公司天津300456 交通运输部天津水运工程科学研究所港口水工建筑技术国家工程实验室天津300456

随着船舶大型化和停泊水域动力环境复杂化,利用现行JTS 144-1—2010《港口工程荷载规范》附录F计算船舶水流力时,发现公式中存在诸多缺陷,主要为:1)相对水深适用范围窄;2)水流流向角分区段计算方法不统一;3)纵、横向水流分力的作用点不... 详细信息

随着船舶大型化和停泊水域动力环境复杂化,利用现行JTS 144-1—2010《港口工程荷载规范》附录F计算船舶水流力时,发现公式中存在诸多缺陷,主要为:1)相对水深适用范围窄;2)水流流向角分区段计算方法不统一;3)纵、横向水流分力的作用点不明确;4)引用相关数据缺陷等。严重制约标准规范的推广应用。因此,基于标准修正专项的研究,通过收集比对国外标准和规范等资料,以及结合笔者前期所开展大量船舶物理模型试验结果等方法,得到了将现行规范水流力计算公式中相对水深适用条件由1.5扩大至6.0;提出了以船舶中心为力作用点的新坐标系下,采用横向分力、纵向分力和偏心力矩3部分组成的水流力计算修正方法,满足了规范修正目的。

关键词：船舶水流力相对水深水流力系数计算方法

肝胆管囊腺瘤和囊腺癌的CT、MRI表现及其与病理对照分析

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中国CT和MRI杂志 2024年第3期22卷 106-108页

作者：陈天忠刘艳萍黄宝晗广西壮族自治区脑科医院放射科广西柳州545000

目的探讨肝胆管囊腺瘤和囊腺癌的CT及MRI表现,并与病理对照分析,以提高对该病的术前影像诊断准确性及鉴别诊断水平。方法回顾性分析经手术病理证实的11例肝胆管囊腺瘤及囊腺癌患者的影像学征象及病理学特点,其中9例均行CT平扫及三期... 详细信息

目的探讨肝胆管囊腺瘤和囊腺癌的CT及MRI表现,并与病理对照分析,以提高对该病的术前影像诊断准确性及鉴别诊断水平。方法回顾性分析经手术病理证实的11例肝胆管囊腺瘤及囊腺癌患者的影像学征象及病理学特点,其中9例均行CT平扫及三期增强扫描,5例同时行MRI平扫及动态增强扫描。结果在11例患者中,囊腺瘤8例,囊腺癌3例:11例均为单发,肝左叶7例,右叶3例,肝多叶受累1例;1例囊腺瘤为单囊性病灶,囊壁光整,CT见囊内主要表现为水样密度;1例囊腺癌以实性成为主,其余9例囊腺瘤及囊腺癌呈多发囊状,5例囊腺瘤囊壁光整,厚薄一致,部分分隔均匀增厚,增强扫描无强化或轻度强化;2例囊腺瘤有囊壁钙化;2例囊腺癌囊壁及其内分隔厚薄不一,增强扫描可见实性结节强化,门静脉期强化减退,呈“结节”状或“菜花状”,部分断面锯齿状改变。结论肝胆管囊腺瘤及囊腺癌的CT、MRI表现,充分反映其病理学特点,注意病变的一些影像学特征性表现,如分隔不均匀增厚,囊壁“结节”或“菜花样”突起及伴有粗大钙化,在囊腺瘤及囊腺癌的鉴别诊断上具有重要意义。

关键词：胆管肿瘤囊腺瘤囊腺癌体层摄影术 X线计算机磁共振成像

Integrative square-grid triboelectric nanogenerator as a vibrational energy harvester and impulsive force sensor

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Nano Research 2018年第2期11卷 1157-1164页

作者： Chuan He Weijun Zhu Guang Qin Gu Tao Jiang Liang Xu bao Dong Chen Chang bao han Dichen Li Zhong Lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing China CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology (NCNST) Beijing China State Key Laboratory of Manufacturing Systems Engineering Xi’an Jiaotong University Xi’an China Collaborative Innovation Center of High-End Manufacturing Equipment Xi’an Jiaotong University Xi’an China University of Chinese Academy of Sciences Beijing China School of Materials Science and Engineering Georgia Institute of Technology Atlanta USA

A square-grid triboelectric nanogenerator （SG-TENG） is demonstrated for harvesting vibrational energy and sensing impulsive forces. Each square of the three-dimensional （3D）-printed square grid is filled with an aluminum （A1） ball. The grid structure allows the SG-TENG to harvest vibrational energy over a broad bandwidth and operate at different vibrational angles. The most striking feature of the SG-TENG is its ability of being scaled and integrated. After connecting two SG-TENGs in parallel, the open-circuit voltage and short-circuit current are significantly increased over the full vibrational frequency range. Being integrated with a table tennis racket, the SG-TENG can harvest the vibrational energy from hitting a ping pong ball using the racket, where a direct hit by the racket generates an average output voltage of 10,9 ~ 0.6 V and an average output current of 0.09 ± 0.02 boA. Moreover, the SG-TENG integrated into a focus mitt can be used in various combat sports, such as boxing and taekwondo, to monitor the frequency and magnitude of the punches or kicks from boxers and other practitioners. The collected data allow athletes to monitor their status and improve their performance skills. This work demonstrates the enormous potential of the SG-TENG in energy harvesting and sensing applications.

关键词： square grid triboelectric nanogenerator vibration sensor

Evaluation of the Resistance of Different Tea Cultivars to Tea Aphids by EPG Technique

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Journal of Integrative Agriculture 2012年第12期11卷 2028-2034页

作者： Liang Li-yun Liu Li-fang Yu Xiao-ping han bao-yu College of Tea & Food Science and Technology Anhui Agricultural University Zhejiang Provinvial Key Laboratory of Bio-Metrology and Inspection & Quarantine China Jiliang University

In order to investigate the resistance of tea plant to tea aphid, the feeding behavior of tea aphids on six different tea cultivars was monitored by （EPG） technique. The result showed that the duration of El, E2 as well as （E I＋E2） which was feeding waveforrns of Toxoptera aurantii （Boyer） in tea phloem was significantly different by variance analysis （P〈0.05） and so did the duration of the probing of T. aurantii in all the tea tissues. And the six tea cultivars were classified into three groups with cluster analysis, based on the six major parameters which were durations of np, C, El, E2, F, and G waveforms, then the six major parameters of these three groups were detected by variance analysis, and the rank of six different tea cultivars＇ resistance to T. aurantii from strong to weak was Zhongcha 108, Sucha 1, Anjibaicha, Longjing 43, Xicha 5, and Sucha 120. As this result was in accord with the investigation into the tea field, we concluded that EPG technique was one of the most important means to examine tea plant resistance to T. aurantii and the durations of waveform El, E2 and （El＋E2） were important parameters for evaluating resistance of tea plants to tea aphids.

关键词： Toxoptera aurantii EPG parameters cluster analysis tea plant resistance

Nanotip-induced ultrahigh pressure-sensitive cement-based composite and its pressure-sensitive characteristic model

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Nanotip-induced ultrahigh pressure-sensitive cement-based co...

第八届中国功能材料及其应用学术会议

作者： han bao-guo SUN Sheng-wei OU Jin-ping School of Civil Engineering Dalian University of Technology School of Civil Engineering Harbin Institute of Technology

ISBN: (纸本)9783037859698

A smart composite is fabricated from cement-matrix and spiky spherical nickel *** electrical resistivityof such composite decreases69.00%under uniaxial *** gage factor of this composite ishigherthan 895.45 within the elastic *** ultrahigh pressure-sensitivityis attributed to the unique needle-like surface morphology of nickel *** the normal smooth spherical nickel particles,the needle-like features of spiky spherical nickel particles can induce field emission and tunneling effects,which leads tohighly sensitive responses to strain.A constitutive model relating the change in electrical resistivity to strainof thecomposite is built within the elastic *** model incorporates the field emission effect and the interparticle separation change of nickel powders in *** model is used to predict the pressure-sensitive characteristic behavior of the *** predicted result is compared with the experimental data obtained on the composite,and good agreement is obtained.

关键词： Cement-based composite Spiky spherical nickel powder Pressure-sensitivity Field emission effect Tunneling effect Pressure-sensitive characteristic model

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三维打印光敏树脂牙列模型的形态稳定性

口腔医学研究 2024年第2期40卷 142-146页

作者：吴峻青吴斌刘京京史学明包涵曹丹严斌南京医科大学附属口腔医院正畸科江苏南京210029 江苏省口腔疾病研究重点实验室江苏南京210029 江苏省口腔转化医学工程研究中心江苏南京210029 南京林业大学机械电子工程学院江苏南京210037

目的:研究放置时间及材料对三维打印光敏树脂牙列模型形态稳定性的影响。方法:两种常用光敏树脂材料(FHD1400、E-Model-Light)分别打印10副牙列模型,在完成打印即刻及放置1、3、7、14、28、60 d扫描成数字化三维模型,重叠生成不同时间... 详细信息

目的:研究放置时间及材料对三维打印光敏树脂牙列模型形态稳定性的影响。方法:两种常用光敏树脂材料(FHD1400、E-Model-Light)分别打印10副牙列模型,在完成打印即刻及放置1、3、7、14、28、60 d扫描成数字化三维模型,重叠生成不同时间点模型重叠热力图,测算平均偏差及变形百分比,测量牙弓前、中、后段宽度及长度随时间的变化量。结果:牙列模型随放置时间延长收缩变形加剧,平均偏差、变形百分比及牙弓长宽收缩量在14 d内迅速增加,14 d时牙弓后段宽度收缩大于0.2 mm,超过临床允许误差范围。所有时间点FHD1400组模型平均偏差及变形百分比显著大于E-Model-Light组(P<0.05)。结论:两种临床常用光敏树脂材料牙列模型形态稳定性欠佳,E-Model-Light组稳定性优于FHD1400组,牙列模型从打印到使用不应超过14 d。

关键词：三维打印光敏树脂牙列模型形态稳定性

Formation of Multi-branched Domains in Magnetic Garnet Bubble Films

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Chinese Physics Letters 2000年第1期17卷 52-54页

作者： ZHOU Yan ZHENG De-Juan LI Dan han bao-Shan State Key Laboratory of Magnetism Institute of PhysicsChinese Academy of SciencesBeijing 100080 Cryogenic Laboratory Chinese Academy of SciencesBeijing 100080

A “low-bias-Held method”,for the formation of multi-branched domains(MED's)in garnet bubble films has been *** using this method,only a single MBD can be formed each time inside a pancake coil with an inner diameter of 1 *** formation of MBD's is associated with the nucleettion of vertical-Bloch-lines in their ***,with the decrease of the bias field H_(b) from the "critical static bias field for multi-branched expansion" D[d],the patterns of MBD's become more and more complex,accompanying with the successive formation of three types of hard *** typical photos and the static properties of MBD's are presented.

关键词： walls MBD method