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Morphological Change and Its Mechanism of Eutectic Silicon for Strontium-Modified Alloy A357

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Journal of Iron and Steel Research International 2004年第1期11卷 47-51页

作者： guo jian-ting DU Xing-hao Institute of Metal Research CAS

The Y 2O 3-CeO 2-ZrO 2 powders were prepared using a co-precipitation process and the corresponding coatings were prepared by plasma spraying. The results show that an optimal composition exists in Y 2O 3-doped CeO 2-ZrO 2, but not in CeO 2-doped Y 2O 3-ZrO 2. The powders mainly contain tetragonal phase and a trace amount of monoclinic phase. The homogeneity in composition, large agglomerate size, ideal particle size distribution and high flowability were obtained. The as-sprayed coatings are composed of non-transformable tetragonal phase, tz′structure, and resistant to transformation under thermal or mechanical stresses.

关键词： powder coating co-precipitation plasma spraying non-transformable tetragonal phase

Superplasticity of Directionally Solidified NiAl-15Cr Alloy at High Temperature

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Journal of Iron and Steel Research International 2006年第4期13卷 44-48页

作者： ZHANG Guang-ye ZHANG Hua ZHANG Hou-an WU Xian-ming guo jian-ting School of Electromechanism Engineering Hunan University of Science and Technology Xiangtan 411201 HunanChina Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 Liaoning China

Ni-25Al-15Cr （atomic percent, %） alloy was directionally solidified （DS） under argon atmosphere in an Al2O3-SiO2 ceramic mold by standard Bridgman method. The microstructure of the as-fabricated alloy was studied using optical microscope, X-ray diffractometer, and scanning electron microscope. The alloy consisting of dendritic β- NiAl phase, interdendritic γ/γ′ phase, and transient layer γ′ phase, has been investigated. This alloy exhibits superplastic deformation behavior at 1 273-1 373 K over an initial strain rate range of 8. 35×10 ^-4 -1. 67×10^-2s^-1. The maximum elongation of 280% with strain rate sensitivity index m= 0. 22 was obtained at the temperature of 1 323 K and an initial strain rate of 8. 35×10^-3s^-1. Transmission electron microscopy （TEM） observations indicate that the superplastic deformation stems from the balance between high resistance （by dislocation sliding） and strain softening （by dynamic recovery and recrystallization）.

关键词： intermetallics directional solidification superplasticity microstructure

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大跨度双层钢连廊同吊位连续提升技术

建筑技术 2024年第17期55卷 2056-2060页

作者：付建武徐鹏棋李刚胥浩康郭建厅中建二局第三建筑工程有限公司北京100070

为解决采用架体进行高层大跨度双层钢连廊安装时的精度把控难、工期长、风险大、施工复杂等问题,以某实验室项目4个钢连廊为例,对大跨度双层钢连廊同吊位连续提升技术进行研究和分析,从提升设备和原理、整体提升施工重难点、相关细部节... 详细信息

为解决采用架体进行高层大跨度双层钢连廊安装时的精度把控难、工期长、风险大、施工复杂等问题,以某实验室项目4个钢连廊为例,对大跨度双层钢连廊同吊位连续提升技术进行研究和分析,从提升设备和原理、整体提升施工重难点、相关细部节点构造、钢连廊拼装施工流程,以及分项工程质量管控等方面对该项目连续提升技术及关键要素进行了论述,避免了高处钢桁架散拼问题。

关键词：钢连廊同吊位整体提升

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金属间化合物NiAl的研究进展

中南大学学报（自然科学版） 2007年第6期38卷 1013-1027页

作者：郭建亭中国科学院金属研究所辽宁沈阳110016

介绍在NiAl金属间化合物方面取得的研究成果。主要成果有:NiAl合金超塑性及其机理研究;NiAl合金韧脆转变及其机理;纳米晶NiAl合金及其复合材料;内生颗粒增强NiAl基复合材料及强韧化机制;合金元素的作用以及JJ-3合金的发展。

关键词： NiAl 超塑性韧脆转变(BDT) 纳米晶NiAl NiAl基高温材料 JJ-3合金

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几种微量元素在高温合金中的作用与机理

中国有色金属学报 2011年第3期21卷 465-475页

作者：郭建亭中国科学院金属研究所沈阳110016

研究几种微量元素对高温合金力学性能和微观组织结构的影响;从晶界结合力、晶界沉淀和凝固偏析等方面对微量元素的不同作用进行讨论。结果表明:适量的B、C、Y、La、Ce、Zr和Mg明显改善高温合金的持久性能;Si和S则明显降低高温合金的持... 详细信息

研究几种微量元素对高温合金力学性能和微观组织结构的影响;从晶界结合力、晶界沉淀和凝固偏析等方面对微量元素的不同作用进行讨论。结果表明:适量的B、C、Y、La、Ce、Zr和Mg明显改善高温合金的持久性能;Si和S则明显降低高温合金的持久性能;而P对一些高温合金特别是变形高温合金表现出有益作用,而对另一些高温合金特别是铸造合金表现出有害作用。

关键词：高温合金微量元素作用机理力学性能微观组织

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自密实混凝土在厚重结构中的应用

工程建设与设计 2024年第6期 112-114页

作者：李贺龙成桂琳郭建婷丁旦斌剡江伟中核华辰建筑工程有限公司西安712000

详细论述了自密实混凝土的原理、特点以及应用范围,分析了自密实混凝土在厚重结构中的应用优势,以及厚重结构施工中自密实混凝土的相关技术参数,如水胶比、坍落度、砂率等,并针对自密实混凝土施工工序提出了具体施工要点,并以实际应用... 详细信息

详细论述了自密实混凝土的原理、特点以及应用范围,分析了自密实混凝土在厚重结构中的应用优势,以及厚重结构施工中自密实混凝土的相关技术参数,如水胶比、坍落度、砂率等,并针对自密实混凝土施工工序提出了具体施工要点,并以实际应用案例分析了自密实混凝土在厚重结构中的应用过程与效用,以此作为自密实混凝土在厚重结构中应用的参照实例,切实提高自密实混凝土在厚重结构中的应用质量。

关键词：自密实混凝土厚重结构应用实例

Translocation of a fish spike from the pharynx to the thyroid gland:A case report

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World Journal of Clinical Cases 2024年第7期12卷 1365-1370页

作者： Deng Li Wan-ting Zeng jian-guo jiang Ji-Chuan Chen Department of Otolaryngology Head and Neck Surgery Army Medical Center of PLAChongqing 400042China

BACKGROUND A fish spike stuck in the throat is a common ear,nose,and throat(ENT)***,it is very rare for a fish spike to reach the thyroid tissue through the throat,which is very dangerous and can lead to pharyngeal fistula,cervical abscess,mediastinal abscess,and thyroid *** and timely management can help reduce complications,especially in elderly *** SUMMARY In the case presented here,the causative factor was dentures,but improper management aggravated the *** the case presented here,an elderly woman with a history of accidentally swallowing fish bones for 20 d had a sensation of foreign bodies in her ***,computed tomography(CT)of the neck showed that the left side of the thyroid gland had a dense shadow in the form of a *** If a fishbone foreign body is not visible during endoscopic examination but the patient has significant symptoms,the surgeon should be aware that the fishbone may be lodged in the *** avoid a misdiagnosis,ultrasound,CT,and other tests can be used to clarify the diagnosis.T The first step in treating a fish bone in the thyroid gland is to determine the position of the foreign body and the extent of the infection,and to develop a personalized surgical plan for its *** the same time,scientific information should be made available to the general public so that people know that if a fish bone is accidentally lodged,they should not force it to be swallowed or be spit out by inducing vomiting,which are incorrect methods and may aggravate the condition or even cause it to migrate outside the cavity,leading to serious complications,as in this reported case.

关键词： Fish spike Thyroid Pharynx Foreign body migration Case report

Harnessing data using symbolic regression methods for discovering novel paradigms in physics

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 1-11页

作者： jianyang guo Wan-jian Yin College of Energy Soochow Institute for Energy and Materials Innovations(SIEMIS)Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006China Shanghai Qi Zhi Institute Shanghai 200232China Light Industry Institute of Electrochemical Power Sources Soochow UniversitySuzhou 215006China

In recent years,machine-learning methods have profoundly impacted research in the interdisciplinary fields of ***,most machine-learning models lack interpretability,and physicists doubt the credibility of their conclusions because they cannot be combined with prior physical ***,this review focuses on symbolic regression,which is an interpretable machine-learning ***,the relevant concepts of machine learning are introduced in conjunction with ***,we provide an overview of symbolic regression ***,the recent directions for the application of symbolic regression methods in different subfields of physics are outlined,and an overview of the ways in which the applications of symbolic regression have evolved in the realm of physics is *** major aim of this review is to introduce the basic principles of symbolic regression and explain its applications in the field of physics.

关键词： machine learning genetic programming symbolic regression

基于机器视觉的履带运输车智能视频监控报警方法研究

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智能建筑与智慧城市 2024年第7期 25-27页

作者：吴希凡李贺龙王辉郭建婷周宏宇陈洪生中核华辰建筑工程有限公司海能机械科技(辽宁)有限公司

为发挥履带运输车更高的效能与价值,引进机器视觉,开展履带运输车智能视频监控报警方法的设计研究。根据运输车的现场作业环境与工作需求,进行CCD工业相机的选型,确定需要采集的视频数据,设计基于机器视觉的履带运输车进行视频智能采集... 详细信息

为发挥履带运输车更高的效能与价值,引进机器视觉,开展履带运输车智能视频监控报警方法的设计研究。根据运输车的现场作业环境与工作需求,进行CCD工业相机的选型,确定需要采集的视频数据,设计基于机器视觉的履带运输车进行视频智能采集;利用集成机器视觉后履带运输车智能视频分析模块,进行监控视频干扰信息过滤处理;引进边缘算子,自动识别视频中的关键信息,以此辨识不同物体,实现视频源中价值信息的提取与事故现场定位、预警。实例应用实验结果表明:在实际应用中,设计的方法可以满足运输车智能视频监控报警需求,且报警具有较强的即时性。

关键词：机器视觉智能视频监控过滤处理报警方法履带运输车

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