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Constitutive behavior and processing maps of low-expansion GH909 superalloy

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International Journal of Minerals,Metallurgy and Materials 2017年第4期24卷 432-443页

作者： Zhi-hao Yao Shao-cong Wu Jian-xin Dong qiu-ying yu Mai-cang Zhang Guang-wei Han School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China The Fu Foundation School of Engineering and Applied Science Columbia University New York 10027 USA Beijing Institute of Aeronautical Materials Beijing 100095 China Department of High Temperature Materials Research Central Iron and Steel Research Institute Beijing 100081 China

The hot deformation behavior of GH909 superalloy was studied systematically using isothermal hot compression tests in a temperature range of 960 to 1040°C and at strain rates from 0.02 to 10 s−1with a height reduction as large as 70%. The relations considering flow stress, temperature, and strain rate were evaluated via power-law, hyperbolic sine, and exponential constitutive equations under different strain conditions. An exponential equation was found to be the most appropriate for process modeling. The processing maps for the superalloy were constructed for strains of 0.2, 0.4, 0.6, and 0.8 on the basis of the dynamic material model, and a total processing map that includes all the investigated strains was proposed. Metallurgical instabilities in the instability domain mainly located at higher strain rates manifested as adiabatic shear bands and cracking. The stability domain occurred at 960–1040°C and at strain rates less than 0.2 s−1; these conditions are recommended for optimum hot working of GH909 superalloy. © 2017, University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg.

关键词： Compression testing Constitutive equations Deformation Hot working Microstructural evolution Shear bands Strain Superalloys

Photogenerated singlet oxygen over zeolite-confined carbon dots for shape selective catalysis

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Science China Chemistry 2019年第4期62卷 434-439页

作者： qiu-ying yu Guang-Yao Zhai Tian-Lu Cui Hui Su Zhong-Hua Xue Jun-Jun Zhang Peter J.Pauzauskie Shin-ichi Hirano Xin-Hao Li Jie-Sheng Chen School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Department of Materials Science & Engineering University of Washington Hirano Institute for Materials Innovation Shanghai Jiao Tong University

Singlet oxygen as an activated oxygen species played an important role in organic synthesis. Suitable catalyst for converting ubiquitous oxygen molecule to singlet oxygen under mild conditions has attracted a wide range of attention. Herein, carbon dots have been confined into mesopores of silicalite-1 nanocrystals framework and acted as active sites for generation of singlet oxygen. The high oxygen-adsorption capacity of zeolite nanocrystals facilitated the photocatalytic generation rate of singlet oxygen, outpacing the free-standing carbon dots for 14-fold. The integrated carbon dot-zeolite nanocrystal hybrid also exhibited a special size-dependent selectivity for organic synthesis by using the in situ formed and confined singlet oxygen as active oxygen species.

关键词： zeolite photocatalysis singlet oxygen carbon dots shape-selective

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基于MCU的简易测氡仪研制

核电子学与探测技术 2007年第1期27卷 145-146,153页

作者：杜根远邱颖豫张江许昌学院计算机科学与技术学院河南许昌461000 成都理工大学应用核技术与自动化工程学院成都610059

介绍了基于MCU的测氡仪的内部组成与实际电路原理。选用PHILIPS公司P89C58单片机作仪器的微控制器,实现了对输入脉冲的定时计数、数据处理、显示、键盘接口、通信等功能。仪器具有功耗较低、集成度与微机化程度较高等特点,适于用于野外... 详细信息

介绍了基于MCU的测氡仪的内部组成与实际电路原理。选用PHILIPS公司P89C58单片机作仪器的微控制器,实现了对输入脉冲的定时计数、数据处理、显示、键盘接口、通信等功能。仪器具有功耗较低、集成度与微机化程度较高等特点,适于用于野外工作。

关键词：测氡仪单片机单道脉冲幅度分析器串口通信

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竹炭纤维舒适功能针织产品的开发

上海纺织科技 2011年第2期39卷 18-19,25页

作者：裘玉英嘉兴学院设计学院浙江嘉兴314001

根据竹炭纤维与棉纤维混纺纱线的特点设计了不同的针织物组织,确定了合适的染前处理和染色工艺,并通过测试不同组织针织物的各项服用性能,包括悬垂性、透气性、吸湿排汗性和顶破强力,比较后认为,纬平针组织具有良好的透气性和悬垂性,其... 详细信息

根据竹炭纤维与棉纤维混纺纱线的特点设计了不同的针织物组织,确定了合适的染前处理和染色工艺,并通过测试不同组织针织物的各项服用性能,包括悬垂性、透气性、吸湿排汗性和顶破强力,比较后认为,纬平针组织具有良好的透气性和悬垂性,其他性能也符合规定要求,由此开发出了具有良好负离子释放功能以及穿着舒适的针织产品。

关键词：针织物竹炭纤维染色整理负离子

服装快速报价系统的建立与应用——影响服装企业接单能力的因素分析

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丝绸 2006年第2期43卷 36-37,41页

作者：裘玉英嘉兴学院服装与艺术设计学院浙江嘉兴314001

影响服装企业接单能力的因素主要是企业的加工能力和竞争能力两方面。通过对流水加工线上的三项能力参数的讨论,对企业的定单加工能力作了评估;同时讨论了加工费用的价格形成,提出了简单实用的计算方法,评估了企业的竞争能力。

关键词：服装外贸报价系统接单能力竞争力

Epidemiology of eye injuries sustained by military personnel in China

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Chinese Journal of Traumatology 2011年第6期14卷 359-362页

作者： XIAO Jian-he ZHANG Mao-nian JIANG Cai-hui ZHANG ying qiu Huai-yu Department of Ophthalmology General Hospital of Chinese PLA Beijing 100853 China

Objective： To investigate the epidemiological characteristics of eye injuries sustained by military personnel in Chinese army. Methods： Eleven military evacuation hospitals located in different regions were selected for this study. We reviewed all the medical records of eye injuries sustained by military personnel between January 2005 and December 2009. Patients＇ information was collected. All data were put into database and analyzed statistically. Results： Totally there were 415 inpatients with eye injuries （442 eyes） and their mean age was 24.40 years. Eye injury accounts for 13.51% of all eye diseases in this study. From 2006 to 2009, the number of eye injury increased gradually. Among them, 175 （42.17%） were injured in leisure time, and 145 （34.94%） in working time. Twenty-two （5.30%） patients had an eye surgery or history of eye disease before injury. In all, 246 patients （59.28%） were sent to evacuation hospital within 24 hours and 64 （56.64%） underwent surgeries in 24 hours after injury. There were 389 patients （93.73%） hospitalized for 1 time. Visual acuities of 187 eyes （42.31%） were grade 1 （≥ 20/40） after injury. When discharge, 349 eyes （78.96%） obtained a visual acuity of grade 1. Conclusion： Eye injury has a very frequent incidence in Chinese army and much more attention should be paid to prevent it.

关键词： Epidemiology Eye injuries Militaryhygiene Military personnel

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基于MCU氡室数据采集系统的谱测量电路

核电子学与探测技术 2008年第3期28卷 580-582,607页

作者：邱颖豫杜根远张江许昌学院计算机科学与技术学院河南许昌461000 电子科技大学生命科学与技术学院四川成都610059

谱测量电路是氡室数据采集系统非常重要的部分。介绍了氡室谱数据采集系统的谱测量电路的整体结构,较以往这方面文章不同之处在于具体阐述了实际谱测量电路中的峰值甄别电路,峰值展宽,A/D转换系统,控制电路与微控制器等硬件电路组成与... 详细信息

谱测量电路是氡室数据采集系统非常重要的部分。介绍了氡室谱数据采集系统的谱测量电路的整体结构,较以往这方面文章不同之处在于具体阐述了实际谱测量电路中的峰值甄别电路,峰值展宽,A/D转换系统,控制电路与微控制器等硬件电路组成与工作原理,并给出了电路的具体元器件型号参数。该方案设计的氡室谱测量电路具有微机化程度较高、系统运行稳定可靠等特点。

关键词：氡室谱测量电路 MCU

β2-肾上腺素能受体多态性／单倍型与支气管哮喘表型的相关性

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中华结核和呼吸杂志 2008年第3期31卷 201-205页

作者：邱玉英殷凯生南京医科大学第一附属医院呼吸科 210029

目的研究β2-肾上腺素能受体基因的多态性／单倍型与支气管舒张剂的反应性及血清免疫球蛋白E的负对数（lgIgE）间的关系。方法2006年2月至2007年2月采用DNA测序法测定了201例哮喘患者（哮喘组）和276名健康对照者（健康对照组）的β2-A... 详细信息

目的研究β2-肾上腺素能受体基因的多态性／单倍型与支气管舒张剂的反应性及血清免疫球蛋白E的负对数（lgIgE）间的关系。方法2006年2月至2007年2月采用DNA测序法测定了201例哮喘患者（哮喘组）和276名健康对照者（健康对照组）的β2-AR基因5个位点（-47、-20、46、79、252）的基因型并确定其单倍型。统计学处理采用SPSS 11．5软件。以拟和优度的χ^2检验计算各位点基因型频率是否符合Hardy-Weinberg平衡。5个位点基因型的频率比较采用卡方检验，位点间的连锁不平衡采用确切概率法，不同基因型及单倍型与定量指标间的比较采用方差分析。如果方差分析有统计学意义，则用LSD方法对各组间的值进行两两比较。结果哮喘组中Arg16Arg16基因型患者的支气管舒张剂反应性为（13±4）L，与Arg16Gly16基因型[（7±3）L]及Gly16Gly16基因型[（7±3）L]比较差异有统计学意义（F=81．55，P〈0．01）；在哮喘组6种单倍型中，单倍型Arg16Gln27／Arg16Gln27的△FEV1最高[（13．4±3．5）L]，与其他种单倍型[Gly16Gln27／Gly16Gln27（6．4±0．6）L、Gly16Glu27／Gly16Glu27（7．6±3．1）L、Gly16Gln27／Gly16Glu27（6．9±3．5）L、Gly16Gln27／Arg16Gln27（7．2±3．3）L及Gly16Glu27／Arg16Gln27（7．9±2．7）L]比较差异有统计学意义（F=32．55，P〈0．01）；哮喘组中Gln27Gln27基因型患者的血清lgIgE为（2．51±0．33）IU／L，与Gln27Glu27基因型患者的血清lgIgE[（2．30±0．82）IU／L]比较差异有统计学意义（F=3．89，P〈0．05）；哮喘组中单倍型Gly16Glu27／Arg16Gln27的血清lgIgE最低[（2．13±0．15）IU／L]，与其他4种单倍型[Arg16Gln27／Arg16Gln27为（2．56±0．14）IU／L、Gly16Glu27／Gly16Glu27为（2．40±0．16）IU／L、Gly16Gln27／Gly16Glu27为（2．54±1．26）IU／L、Gly16Gln27／Arg16Gln27为（2．48±0．48）IU／L]比较差异有统计学意义（F=3．56，P〈0．01）。结论依据所研究的哮喘表型，无论是β2-AR基因的多态性，还是单倍型均可能影响疾病的表现。

关键词： β2-AR基因哮喘单倍型多态性

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Broadband and perfect terahertz absorber based on multilayer metamaterial with cross-ring patterned structures

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Optoelectronics Letters 2025年第1期21卷 1-6页

作者： WEN Jin LIU Zhanzhi WU Zhengwei PAN yu ZHANG ying School of Science Xi'an Shiyou University Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells

Broadband and perfect terahertz absorber based on multilayer metamaterial using cross-ring patterned structures is proposed and investigated. The structure of the absorber is double absorption layers consisting of a chromium cross ring and eight isosceles right triangles. The unique structure of the double absorbing layers excites the electric dipole multimode resonance, giving rise to high absorption performance. Meanwhile, the influence of construal parameters on absorber behavior is also discussed. The numerical results show that the absorption achieves over 90% ranging from 2.45 THz to 6.25 THz and 99% absorption in the range of 3.7—5.3 THz. The realization of broadband and perfect absorber is described using the impedance matching principle. It is obviously found that the absorber is insensitive to the high angle of incidence for both transverse electric(TE) and transverse magnetic(TM) polarizations. Compared with the former reports, this absorber has remarkable improved absorption efficiency and smaller period. The terahertz absorber may be found applications in the fields of energy capture and thermal detection.

关键词： Metamaterials