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等温淬火对灰铸铁组织和性能的影响

铸造 2006年第4期55卷 397-400页

作者：汪振华尹志新刘志科尹秉升广西大学机械工程学院广西南宁530004

研究了等温淬火热处理工艺对灰铸铁组织和性能的影响,并确定了860℃保温2h,然后在300℃保温1.5h的等温淬火热处理工艺,在此热处理工艺条件下可获得贝氏体基体的高性能灰铸铁。

关键词：等温淬火灰铸铁贝氏体

Actively tunable electromagnetically induced transparency in hybrid Dirac-VO2 metamaterials

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Optoelectronics Letters 2025年第1期21卷 13-20页

作者： DI ke XIE Meng XIA Huarong CHENG Anyu liu Yu DU Jiajia Department of Optoelectronic Engineering Chongqing University of Post and Telecommunications Chongqing key Laboratory of Autonomous Navigation and Microsystem Chongqing University of Posts and Telecommunications Department of Automation Chongqing University of Post and Telecommunications

In this paper, we present a metamaterial structure of Dirac and vanadium dioxide（VO2） and investigate its optical properties using the finite-difference time-domain（FDTD） technique. Using the phase transition feature of VO2, the design can realize active tuning of the plasmon induced transparency（PIT） effect at terahertz frequency, thereby converting from a single PIT to a double-PIT. When VO2is in the insulating state, the structure is symmetric to obtain a single-band PIT effect. When VO2is in the metallic state, the structure turns asymmetric to realize a dual-band PIT effect. This design provides a reference direction for the design of actively tunable metamaterials. Additionally, it is discovered that the transparent window's resonant frequency and the Fermi level in this structure have a somewhat linear relationship. In addition, the structure achieves superior refractive index sensitivity in the terahertz band, surpassing 1 THz/RIU. Consequently, the design exhibits encouraging potential for application in refractive index sensors and optical switches.

关键词： Transparency

Ultrastructure Observation of Cysticercus Pisiformis and Its Function Analysis

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Animal Husbandry and Feed Science 2012年第4期4卷 145-149,160页

作者： PAN Yao-qian ZHAO Zhen-sheng CHEN Jin-shan YIN Mei TANG Hai-rong LI Rui-zheng LI Hui-zheng liu zhi-ke ZHANG Li-jie liu Xing-you College of Animal Science Henan Institute of Science and Technology College of Animal Science and Technology Henan University of Science and Technology

[ Objective] The aim of the study was to observe the ultrastructure of Cysticercus pisiformis under different state. [ Method] The Cysti- cercus pisiformis were obtained in the procedure of slaughter inspection form meat-packing plant. The Cysticercus pisiformis was taken out by cut- ting cyst directly, or cultured with physiologic saline containing 10% bile until evagination. Then it was observed and recorded by scanning electron microscopy. [ Result] Observed from top of scolex of Cysticercus pisiformis locate in cyst, the rostellum looked like an umbrella. The cutaneous muscular columns with hamula covered the front end of scolex. Viewed from the side, a row of antlers-liking hamula adhered to the scolex. Four suckers were looked like more width and body segments less time, in which there were lots of wrinkles in their surface respectively. The Cysticercus pisiformis cultured was divided obviously into scolex, neck, body segment and zone of cyst. When cutaneous muscular column of rostellum con- tracted, the antler-liking hamula extended to periphery that the ring-liking contraction appeared in neck and the lengthways contraction in body seg- ments. [ Conclusion] The Cysticercus pisiformis under different state has distinctly dissimilar ultrastructure.

关键词： Cysticercus pisiformis Ultrastructure Rostellum Sucker Scanning electron microscope

Effect of Ti Additions on Mechanical and Thermodynamic Properties of W-Ti Alloys: A First-principles Study

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 246-257页

作者： ZHANG Jian NIE Wei HUANG Jin ZHU ke liu Ruxia ZHANG Ruizhi LUO Guoqiang SHEN Qiang State key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China

The mechanical and thermodynamic properties of W-Ti alloys(including W_(15)Ti_(1),W_(14)Ti_(2),W_(12)Ti_(4) and W_(8)Ti_(8) alloys)were investigated by the first-principles approach based on density functional *** results indicate that W-Ti alloys except W_(8)Ti_(8) are thermodynamically *** modulus and hardness of W-Ti alloys are smaller than those of pure tungsten and gradually decrease with increasing Ti ***,their B/G ratios and Poisson's ratios exceed those of pure tungsten,suggesting that the introduction of Ti decreases the mechanical strength while enhancing the ductility of W-Ti *** thermal expansion coefficients for W-Ti alloys all surpass those of pure tungsten,indicating that the introduction of titanium exacerbates the thermal expansion behavior of W-Ti ***,elevated pressure has the capacity to suppress the thermal expansion tendencies in titanium-doped tungsten *** study offers theoretical insights for the design of nuclear materials by exploring the mechanical and thermodynamic properties of W-Ti alloys.

关键词： first-principles mechanical properties thermodynamic properties tungsten-titanium alloys

电子显微术在原位金属基复合材料界面研究中的应用

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铸造技术 2005年第5期26卷 431-434页

作者：刘志科汪振华苏广才广西大学机械工程学院广西南宁530004

原位金属基复合材料的增强颗粒是在基体中原位生成,因而增强颗粒和基体间不存在界面反应,两者间为直接的原子结合。界面对原位金属基复合材料的性能有着重要的影响。本文综述了扫描电子显微镜、普通透射电子显微镜、高分辨电子显微镜和... 详细信息

原位金属基复合材料的增强颗粒是在基体中原位生成,因而增强颗粒和基体间不存在界面反应,两者间为直接的原子结合。界面对原位金属基复合材料的性能有着重要的影响。本文综述了扫描电子显微镜、普通透射电子显微镜、高分辨电子显微镜和电子能量损伤谱仪等现代电子显微技术在原位金属基复合材料界面研究中的应用及部分研究结果。利用现代电子显微技术和先进的实验方法在原子尺度上对界面的精细结构、结合方式、界面缺陷、界面稳定性及其影响因素等进行研究,从而在较深的层次上认识原位金属基复合材料的界面,对在该领域做进一步研究探讨起到促进作用。

关键词：金属基复合材料界面研究电子显微术应用高分辨电子显微镜电子显微技术扫描电子显微镜透射电子显微镜增强颗粒界面稳定性原位生成界面反应原子结合研究结果能量损伤精细结构原子尺度实验方法结合方式

Highly mass activity electrocatalysts with ultralow Pt loading on carbon black for hydrogen evolution reaction

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 182-190页

作者： Shaorou ke Yajing Zhao Xin Min Yanghong Li Ruiyu Mi Yangai liu Xiaowen Wu Minghao Fang Zhaohui Huang Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastersNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China

Pt-based nanocatalysts offer excellent prospects for various ***,the low loading of Pt with excellent performance for efficient and stable nanocatalysts still presents a considerable *** this study,nanocatalysts with ultralow Pt content,excellent performance,and carbon black as support were prepared through in-situ ***~2-nm particles uniformly and stably dispersed on carbon black because of the strong s-p-d orbital hybridizations between carbon black and Pt,which suppressed the agglomeration of Pt *** unique structure is beneficial for the hydrogen evolution *** catalysts exhibited remarkable catalytic activity for hydrogen evolution reaction,exhibiting a potential of 100 mV at 100 mA·cm^(-2),which is comparable to those of commercial Pt/C *** activity(1.61 A/mg)was four times that of a commercial Pt/C catalyst(0.37 A/mg).The ultralow Pt loading(6.84wt%)paves the way for the development of next-generation electrocatalysts.

关键词： hydrogen evolution reaction ultralow platinum in-situ synthesis ultrasound

2224例医疗损害纠纷精神损害赔偿的实证研究

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中国医院管理 2016年第6期36卷 54-57页

作者：石镁虹章桦刘可智西南医科大学护理学院四川泸州646000 西南医科大学法学院四川泸州646000 西南医科大学附属第一医院四川泸州646000

目的分析医疗损害案件中的精神损害赔偿的相关因素,构建医疗损害中精神损害赔偿模型。方法以2 224例医疗损害纠纷案件为研究对象,构建线性回归模型。结果地区、医院等级、损害结局、医院责任这4个因素对医疗损害纠纷精神损害赔偿金额有... 详细信息

目的分析医疗损害案件中的精神损害赔偿的相关因素,构建医疗损害中精神损害赔偿模型。方法以2 224例医疗损害纠纷案件为研究对象,构建线性回归模型。结果地区、医院等级、损害结局、医院责任这4个因素对医疗损害纠纷精神损害赔偿金额有影响,将4个有效因素纳入线性回归模型,构建医疗损害中的精神损害赔偿模型。结论医疗损害中的精神损害赔偿模型计算简明,可以为医患双方提供精神损害赔偿的数额参考,避免患方索赔的盲目性,合理维护医患双方权益,提高医疗纠纷的解决率,保障法律的可预期性。

关键词：医疗损害精神损害赔偿实证研究

成都市区1486名女性大、中学生进食障碍的现况调查

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中华流行病学杂志 2008年第4期29卷 321-324页

作者：梁雪梅郭兰婷刘可智四川大学华西医院心理卫生中心成都610041

目的探讨女性大、中学生进食障碍的患病率及其相关因素。方法采用最优分配分层整群随机抽样法从成都市区抽取大学6所、普通高中1所、普通中专1所、成人中专2所、职业高中1所、初中3所，共1486名女性大、中学生，采用进食障碍问卷、体像... 详细信息

目的探讨女性大、中学生进食障碍的患病率及其相关因素。方法采用最优分配分层整群随机抽样法从成都市区抽取大学6所、普通高中1所、普通中专1所、成人中专2所、职业高中1所、初中3所，共1486名女性大、中学生，采用进食障碍问卷、体像障碍量表、抑郁自评量表、贝克焦虑自评量表、自编调查问卷进行现场调查。采用t检验和logistic回归分析数据。结果成都市女性大、中学生进食障碍估计患病率3．32％；各年龄组中17岁组估计患病率最高（7．16％）；各学龄阶段中高中组最高（5．21％）。进食障碍倾向组在认识偏差（P=0．009）、期望偏差（P=0．000）方面均比非进食障碍倾向组得分高。关注减肥相关媒体宣传、童年时父母关系紧张、童年时受虐待、进食障碍问卷的不满体型因子、内感受意识因子及焦虑是进食障碍倾向的相关危险因素。结论进食障碍在女性大、中学生中估计患病率较高，应积极干预。

关键词：进食障碍神经性厌食症神经性贪食症患病率

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注浆法在山区高填路堤不均匀沉降中的应用

山西建筑 2005年第5期31卷 61-62页

作者：刘志科济源市公路管理局

结合注浆法成功处理温邵公路济源山区段部分高填路堤不均匀沉降的实例 ,就注浆法的基本原理、设计方案、施工要点等进行了阐述 ,提出了注浆法处理路基不均匀沉降的显著社会和经济效益。

关键词：注浆法高填路堤不均匀沉降