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Shape Memory Effect Induced by Stress-induced α' Martensite in a Metastable Fe–Cr–Ni Austenitic Stainless Steel

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Acta Metallurgica Sinica(English Letters) 2017年第6期30卷 513-520页

作者： Yong-Ning Wang Jie Chen hua-bei Peng Yu-hua Wen School of Manufacturing Science and Engineering Sichuan UniversityChengdu 610065China School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China

It is not clear whether a shape memory effect （SME） can be realized by stress-induced α＇ martensite in metastable austenitic stainless steels although the stress-induced ε martensite in these materials can result in the SME. To clarify this problem, the relationship between the shape recovery and the reverse transformation of the stress-induced ε and α＇ martensite in a 304 stainless steel was investigated. The results show that the stress-induced α＇ martensite can result in the SME when heating above 773 K. After deformation at 77 K and step heating or directly holding at 1073 K, two-stage shape recoveries below 440 K and above 773 K can be obtained due to the reverse transformation of the stress-induced ε martensite and α＇ martensite, respectively. After deformation at room temperature, the α＇ martensite produced can result in the SME only when directly holding at 1073 K. The intrusion of more dislocations before the formation of the α＇ martensite at room temperature than at 77 K is the reason that the α＇ martensite induced at room temperature cannot result in the SME in the case of slow heating. The recovered strains resulting from the stress-induced ε and α＇ martensite are proportional to the amounts of their reverse transformation, respectively.

关键词： Austenitic stainless steel Shape memory effect Alpha prime martensite Epsilon martensite Two-stage recoveries

Improvement on a Michelson interferometer for bunch length measurement of a femtosecond accelerator

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Nuclear Science and Techniques 2009年第1期20卷 1-4页

作者： LIN Xuling ZHANG Jianbing bei hua DAI Zhimin Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China Graduate School of Chinese Academy of Sciences Beijing 100049 China

Based on the femtosecond accelerator facility at Shanghai Institute of Applied Physics (SINAP), a conventional far-infrared Michelson interferometer was built to measure the bunch length by means of optical autocorrelation. However, according to the preliminary experiment result, the resolution of interferometer is not good enough, because the mirror-driving mechanism makes the moving mirror tend to tilt or wobble as it retards. Considering of the allowable errors, we calculate the maximum allowable titling angle of the moving mirror, and discuss the alignment plan in this paper.

关键词：辐射原子核超热电子固体靶输运过程放射性

Wideband frequency-dependent dielectric properties of rat tissues exposed to low-intensity focused ultrasound in the microwave frequency range

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Chinese Physics B 2023年第3期32卷 340-347页

作者：王雪 Shi-Xie Jiang 黄林迟子惠吴丹 hua-bei Jiang School of Optoelectronic Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Electronic Science and Engineering(National Exemplary School of Microelectronics) University of Electronic Science and Technology of ChinaChengdu 611731China Department of Psychiatry&Behavioral Neurosciences University of South FloridaTampa 33613USA Department of Medical Engineering University of South FloridaTampa 33620USA

Tissue dielectric properties can vary upon the incident of an acoustic *** goal of this study is to quantify this change due to the acoustoelectric effect(AE),and to obtain the frequency-dependent dielectric properties of tissues exposed to low-intensity focused ultrasound(LIFU).The dielectric properties of the blood,brain,chest muscle,heart,kidney,leg muscle,liver,lung,pancreas,and spleen of rats were measured by an open-ended coaxial probe *** acoustic intensity of LIFU focus was 2.97 MPa(67.6 W/cm^(2)),3.95 MPa(120 W/cm^(2)),and 5.17 MPa(204 W/cm^(2)),respectively,and the measurement frequency band was 0.1–7.08 *** measurement results show that with the LIFU modulation,the conductivity and dielectric constant decreased in the high-frequency band,and on the contrary,they increased in the lowfrequency band,and the larger the acoustic intensity was,the more obvious the phenomenon *** work contributes to a better understanding of the mechanisms by which ultrasound acts on the dielectric properties of biological *** is expected that the findings from this study will provide a basis that the response of tissue to LIFU modulation can be monitored by noninvasive techniques such as microwave-induced thermoacoustic imaging(MTI)and microwave imaging,present a new idea for improving the endogenous contrast between different biological tissues in MTI and acoustoelectric imaging,and possibly lead to the development of a new imaging method based on the relaxation time of tissue after LIFU modulation.

关键词： dielectric property rat tissues low-intensity focused ultrasound

Simulation of coherent spontaneous emission in a FEL with a groove guide

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Nuclear Science and Techniques 2009年第6期20卷 321-324页

作者： LUO Feng bei hua LIN Xuling DAI Zhimin Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China Graduate School of Chinese Academy of Sciences Beijing 100049 China

Based on a femtosecond linear accelerator, here we present a study of the use of a groove guide as the FEL interaction structure for high power FEL experiment. The transmission and attenuation characteristics of the dominant mode in the groove guide are discussed. And the coherent spontaneous emission in the FEL is simulated by Gover theory.

关键词：自由电子激光自发辐射指南模拟相干凹槽直线加速器激光实验

The design and processing of SONG library

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Nuclear Science and Techniques 2016年第4期27卷 96-103页

作者： hua bei Jin-Kun Zhao Qi-Chang Chen Sheng-Yi Si Shanghai Nuclear Engineering Research and Design Institute Shanghai 200233 China

Multi-group cross section library is the basic condition for lattice calculation, which provides the necessary nuclear data parameters. The multi-functional lattice code SONG(Si et al. in Nucl Power Eng 35:111–115,2014. doi:10.13832/***.2014.S2.0112; Chen et al. in Nucl Power Eng 35:127–130, 2014. doi:10.13832/***.2014.S2.0127) is developed to adapt to the research demands of different types of new reactors, especially the fourth generation(GEN-IV) reactors(Cerullo and Lomonaco in Nucl Fuel Cycle Sci Eng, 2012. doi:10.1533/9780857096388.3.333; Giorgio et al. in Energy Policy61:1503–1520, 2013. doi:10.1016/***.2013.06.101).The corresponding multi-group cross section library of SONG(SONGLIB) is well designed with much effort considering the next generation reactors' new feature in material, spectrum, burnup depth, etc. Therefore, the burnup chain(Maria and Jaakko in Nucl Sci Eng164:140–150, 2010. doi:10.13182/NSE09-14), energy group structure(Tholakele et al. in Ann Nucl Energy80:279–292, 2015. doi:10.1016/***.2015.01.038),and reaction path should be specially considered. The library SONGLIB is processed with the Evaluated Nuclear Data File(ENDF), nuclide data auxiliary processing code NJOYBAT(Si et al. 2014), and library management code MANLIB(Si et al. 2014). A series of verification work of SONGLIB is then carried out, and the calculated results are satisfied.

关键词：设计歌曲库核动力工程多群截面库音乐计算结果关键词核燃料循环

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深度次临界工况下的控制棒价值测量技术研究

核技术 2025年第1期48卷 153-161页

作者：司胜义卑华陈伦寿钱仲悠杜超高明敏杨高升核电运行研究(上海)有限公司上海200126 三门核电有限公司三门317100

与传统控制棒价值测量技术不同,深度次临界工况下的控制棒价值测量(以下简称次临界刻棒),依托达临界试验的提棒过程,在全插棒至全提棒的大跨度临界区间进行控制棒价值测量。作为一种全新的控制棒价值测量方法,其棒价值的计算和分析与传... 详细信息

与传统控制棒价值测量技术不同,深度次临界工况下的控制棒价值测量(以下简称次临界刻棒),依托达临界试验的提棒过程,在全插棒至全提棒的大跨度临界区间进行控制棒价值测量。作为一种全新的控制棒价值测量方法,其棒价值的计算和分析与传统的方法有较大的差异,需要开展相关研究。深度次临界工况下,堆芯中子源强的空间分布显著不均匀,传统的基于点堆模型的临界外推公式不再适用,须对源量程中子计数率进行相应的空间修正,确保修正后的源量程探测器的计数率倒数比与反应堆次临界度维持良好的线性关系,从而能够精确预测反应堆的次临界度,并通过拟合的方式给出不同棒组的价值。为了对次临界刻棒系统进行验证,在三门核电厂AP1000机型上开展了两次验证试验,各组棒价值均满足验收准则。验证结果表明,开发的次临界刻棒系统具有一定的可靠性,能够满足次临界刻棒试验的要求。

关键词：次临界度控制棒价值测量源量程探测器计数率倒数比空间修正因子

THz spatial power distribution from the femtosecond linac-undulator system at SINAP

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Nuclear Science and Techniques 2009年第4期20卷 193-196页

作者： LIN Xuling ZHANG Jianbing bei hua LUO Feng DAI Zhimin Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

The generation and observation of coherent THz undulator radiation from femtosecond electron bunches in Shanghai Institute of Applied Physics Femtosecond Accelerator device is *** this paper the experiment setup and f... 详细信息

关键词：加速器应用物理学放射线实验

Microwave-induced thermoacoustic imaging of joints

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Journal of Electronic Science and Technology 2023年第2期21卷 1-13页

作者： Zi-Hui Chi Shuang Du Yang Wang Lin huang Dan Wu hua-bei Jiang School of Optoelectronic Engineering Chongqing University of Posts and TelecommunicationsChongqing400065China School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu611731China Department of Medical Engineering University of South FloridaTampaFL33620USA

Due to the complexity of joint structures and the diversity of disorders in the joints,the diagnosis of joint diseases is *** clinical diagnostic techniques for evaluating joint diseases,such as arthritis,have strengths and *** imaging techniques need to be developed for the diagnosis or auxiliary diagnosis of *** an emerging nonintrusive low-cost imaging method,microwave-induced thermoacoustic imaging(TAI)can present tissue morphology while providing the tissue microwave energy absorption density distribution related to dielectric *** is currently in development to potentially visualize joint anatomic structures and to detect ***,we offer a mini review to summarize the status of research on TAI of joints and present an outlook to the future development of TAI in the detection of joint diseases.

关键词： Arthritis detection Joint structures Thermoacoustic imaging(TAI)

Sodium tanshinone IIA sulfonate attenuates cardiac dysfunction and improves survival of rats with cecal ligation and puncture-induced sepsis

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Chinese Journal of Natural Medicines 2018年第11期16卷 846-855页

作者： MENG Zheng-Jie WANG Chao MENG Ling-Tong BAO bei-hua WU Jin-Hui HU Yi-Qiao College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University State Key Laboratory of Pharmaceutical Biotechnology Medical School Nanjing University School of Pharmaceutical Sciences Nanjing Tech University Jiangsu Key Laboratory for High Technology of Traditional Chinese Medicine Formulae Research College of Pharmacy Nanjing University of Chinese Medicine

Cardiac dysfunction, a common consequence of sepsis, is the major contribution to morbidity and mortality in patients. Sodium tanshinone IIA sulfonate(STS) is a water-soluble derivative of Tanshinone IIA(TA), a main active component of Salvia miltiorrhiza Bunge, which has been widely used in China for the treatment of cardiovascular and cerebral system diseases. In the present study, the effect of STS on sepsis-induced cardiac dysfunction was investigated and its effect on survival rate of rats with sepsis was also evaluated. STS treatment could significantly decrease the serum levels of C-reactive protein(CRP), procalcitonin(PCT), cardiac troponin Ⅰ(cTn-Ⅰ), cardiac troponin T(cTn-T), and brain natriuretic peptide(BNP) in cecal ligation and puncture(CLP)-induced) septic rats and improve left ventricular function, particularly at 48 and 72 h after CLP. As the pathogenesis of septic myocardial dysfunction is attributable to dysregulated systemic inflammatory responses, several key cytokines, including tumor necrosis factor-α(TNF-α), interleukin-1β(IL-1β), interleukin-6(IL-6), interleukin-10(IL-10) and high mobility group protein B1(HMGB1), were detected to reveal the possible mechanism of attenuation of septic myocardial dysfunction after being treated by STS. Our study showed that STS, especially at a high dose(15 mg×kg–1), could efficiently suppress inflammatory responses in myocardium and reduce myocardial necrosis through markedly reducing production of myocardial TNF-α, IL-6 and HMGB1. STS significantly improved the 18-day survival rate of rats with sepsis from 0% to 30%(P < 0.05). Therefore, STS could suppress inflammatory responses and improve left ventricular function in rats with sepsis, suggesting that it may be developed for the treatment of sepsis.

关键词： Sodium tanshinone II A sulfonate Sepsis Cardiac dysfunction Cytokine Cecal ligation and puncture model