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Strengthening and control of second-phase particle precipitation in ferritic/austenitic/martensitic heat-resistant alloys:a review

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Journal of Iron and Steel Research International 2024年第1期31卷 3-23页

作者： Xue-cheng Peng Han-jie guo Xin-fang Zhang yi-wa Luo Ye Sun Jing guo Rong-guang Yang Xiao-dan Zheng School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing100083China Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials University of Science and Technology Beijing(USTB)Beijing100083China Beijing Shougang gitane New MATERIALS Co. Ltd.Beijing102206China

Heat-resistant alloys with excellent mechanical properties are widely used in various fields,and further improvement in their properties is essential to meet the requirements in new-generation advanced supercritical boilers,nuclear reactors,superheaters,and other new materials *** effectively enhance the comprehensive performance of heat-resistant alloys,second-phase particle strengthening has been widely studied,and in the face of different service envi-ronments of advanced heat-resistant steels,the selection of suitable second-phase particles is essential to maximize the performance of these *** this end,three major types of reinforcing phases in heat-resistant alloys such as carbides,rare earth oxides,and intermetallic compounds are summarized.A comparative analysis of the precipitation behavior of the reinforcing phases with different types as well as the risks and means of controlling their use in service,is *** parameters for the application of various types of second-phase particles in heat-resistant alloys are provided to support the design and preparation of new ultrahigh-performance heat-resistant alloys.

关键词： Heat-resistant alloy Second-phase particle Carbide Rare earth oxide Intermetallic compound Strengthening

Diagnostic role of microRNA-125b for hepatocellular carcinoma

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Hepatobiliary & Pancreatic Diseases International 2019年第4期18卷 395-397页

作者： Feng Li Quan-wa Bao Liu-yi-Qi Jiang Qi-Lin Huang Xu Zhang Ju-Xiang Chen Department of Neurosurgery Changzheng HospitalSecond Military Medical University415 Fengyang RoadShanghai200003China State Key Laboratory of genetic Engineering School of Life SciencesFudan University2005 Songhu RoadShanghai 200433China

It is estimated that there was 841 0 0 0 new cases of liver cancer and 782 0 0 0 associated deaths worldwide in 2018,ranking as the sixth most common cancer and the fourth leading cause of cancer-related deaths[1].With approximately 90%of total cases,hepatocellular carcinoma(HCC)is the most frequent type of primary liver cancer,and is a major public global health challenge at present[1].The majority of HCC patients are usually at advanced stages when diagnosed,which misses the optimal treatment and prognosis is ***-fetoprotein(AFP)is the most widely applied diagnostic serum biomarker to detect HCC at present;however,the diagnostic accuracy of AFP is unsatisfactory,with sensitivity of 53%and specificity of 90%for early stage HCC[2].Recently,plenty of studies reported that microRNA-125b(miR-125b)might function as potential diagnostic biomarker in HCC[3–8].miR-125 family,consisting of miR-125a,miR-125b-1,and miR-125b-2,is closely associated with differentiation,proliferation,invasion,and metastasis of cancer ***,the diagnostic accuracy of miR-125b remains inconsistent.

关键词： hepatocellular invasion specificity

Sol-gel Template Synthesis and Photoluminescence Properties of (Pb_(0.5)Sr_(0.5))TiO_(3) Nanotube Arrays

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Chinese Physics Letters 2011年第7期28卷 278-281页

作者： JIANg Yan-Ping wa.g Yu CHAN Lai wa Helen TANg Xin-gui ZHOU yi-Chun Key Laboratory of Low-Dimensional Materials and Application Technology Xiangtan UniversityXiangtan 411105 Department of Applied Physics and Materials Research Centre Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina School of Physics&Optoelectric Engineering and Guangzhou Higher Education Mega CenterGuangdong University of TechnologyGuangzhou 510006

Lead strontium titanate(Pb_(0.5)Sr_(0.5))TiO_(3)(PST)nanotube arrays are prepared by a sol-gel and spin-coating process using an anodic aluminium oxide *** structure and morphology of the as-prepared sample are characterized by x-ray diffraction,scanning electron microscopy and transmission electron *** results show that the as-prepared PST sample possesses a perovskite structure with a relatively uniform diameter of about 200 ***(PL)spectrum of the sample shows emission bands centered at about 2.87 eV at room temperature,which consists of three intense emission sub-bands at 3.02,2.87 and 2.76 eV,*** energy corresponding to the central PL peak is lower than the band-gap energy(3.2 eV)of PST bulk materials,which may originate from the size effect of the PST nanotube *** multi-peaks in the PL spectrum may be attributed to the radiative recombination of trapped electrons and holes in tail and gap states induced by local defect and oxygen *** Raman scattering spectrum of the PST nanotube arrays,which are obviously broadened in comparison with the bulk materials,show that their phonon modes are in agreement with those allowed in the tetragonal phase.

关键词： template perovskite bands

Chinese social media reaction to the MERS-CoV and avian influenza A(H7N9) outbreaks

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Infectious Diseases of Poverty 2013年第1期2卷 259-269,258页

作者： Isaac Chun-Hai Fung King-wa Fu Yuchen ying Braydon Schaible yi Hao Chung-Hong Chan Zion Tsz-Ho Tse Department of Epidemiology Jiann-Ping Hsu College of Public HealthGeorgia Southern UniversityStatesboroGeorgiaUSA Journalism and Media Studies Center The University of Hong KongHong Kong Special Administrative RegionChina Department of Computer Science The University of GeorgiaAthensGeorgiaUSA Department of Biostatistics Jiann-Ping Hsu College of Public HealthGeorgia Southern UniversityStatesboroGeorgiaUSA College of Engineering The University of GeorgiaAthensGeorgiaUSA

Background:As internet and social media use have skyrocketed,epidemiologists have begun to use online data such as google query data and Twitter trends to track the activity levels of influenza and other infectious *** China,Weibo is an extremely popular microblogging site that is equivalent to *** on the wealth of public opinion data contained in posts on Weibo,this study used Weibo as a measure of the Chinese people’s reactions to two different outbreaks:the 2012 Middle East Respiratory Syndrome Coronavirus(MERS-CoV)outbreak,and the 2013 outbreak of human infection of avian influenza A(H7N9)in ***:Keyword searches were performed in Weibo data collected by The University of Hong Kong’s Weiboscope *** values were determined for each keyword and reaction values per million posts in the days after outbreak information was released to the ***:The results show that the Chinese people reacted significantly to both outbreaks online,where their social media reaction was two orders of magnitude stronger to the H7N9 influenza outbreak that happened in China than the MERS-CoV outbreak that was far away from ***:These results demonstrate that social media could be a useful measure of public awareness and reaction to disease outbreak information released by health authorities.

关键词： H7N9 logging Middle

Cellphone application rehabilitation management and evaluations of cardiopulmonary function and motor development in infants with congenital heart disease:a pilot study

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World Journal of Pediatrics 2023年第8期19卷 805-812页

作者： ge-Jing-wa Zhao Zhi-Qiang Li Yang Ma Yao-Bin Zhu Nan Ding Han-Lu yi Shi-Jie Li Dao-Le Yan Jin-Rui Zhang Department of Cardiovascular Surgery II Beijing Children’s HospitalCapital Medical UniversityNational Center for Children’s Health56th Nan Lishi RdBeijing100045China Department of Healthcare Beijing Children’s HospitalCapital Medical UniversityNational Center for Children’s HealthBeijingChina

Congenital heart disease(CHD)has an estimated prevalence of 0.9%,with 0.3%requiring interventional or surgical intervention very early in ***,CHD surgery tends to be performed at a younger *** continued management of the condition is dependent on postoperative care and rehabilitation since the success rate of surgery has significantly increased[1,2].According to American Heart Association guidelines published in 2012.

关键词： surgery congenital younger

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论西南民族档案资源集成管理的战略构建

广西民族大学学报（哲学社会科学版） 2017年第2期39卷 177-184页

作者：杨毅何瓦特云南大学历史档案学院

构建并实现西南民族档案资源的集成管理是时代的诉求,也是历史发展的必然。其最终目标就是依据国家统一的业务规则和数据标准,构建西南民族档案资源集成管理的开放平台,让人们共享西南民族档案资源。这是一项伟大的系统工程,既要从长计... 详细信息

构建并实现西南民族档案资源的集成管理是时代的诉求,也是历史发展的必然。其最终目标就是依据国家统一的业务规则和数据标准,构建西南民族档案资源集成管理的开放平台,让人们共享西南民族档案资源。这是一项伟大的系统工程,既要从长计议,又必须抓住当下有利的发展机遇,尽快在总体谋划的基础上有策略的着力推进。

关键词：民族档案资源西南向度集成管理战略构建

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当下西南民族档案资源管理的路径探索

云南师范大学学报（哲学社会科学版） 2017年第6期49卷 56-63页

作者：杨毅何瓦特云南大学历史与档案学院云南昆明650091

运用档案学、民族学和政治学的原理,将西南民族档案管理置于国家建设发展的视野中,深入探讨以集成控制、集成归档、集成服务为业务工作主线的西南民族档案资源管理平台的主体框架及核心内容。这是突破传统西南民族档案研究的方法,直面... 详细信息

运用档案学、民族学和政治学的原理,将西南民族档案管理置于国家建设发展的视野中,深入探讨以集成控制、集成归档、集成服务为业务工作主线的西南民族档案资源管理平台的主体框架及核心内容。这是突破传统西南民族档案研究的方法,直面与把握西南民族档案管理现实问题的思维转换;也是力求实现民族档案内生潜力和国家建设的政策动力有机结合的颇具时代意义的理性探索。

关键词：民族档案集成管理国家视域西南地区路径

Random Weighting Estimation Method for Dynamic Navigation Positioning

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Chinese Journal of Aeronautics 2011年第3期24卷 318-323页

作者： gAO Shesheng gAO yi ZHONg Yongmin WEI Wenhui School of Automation Northwestern Polytechnical University Xi 'an 710072 China Department of Mechanical Engineering Curtin University WA6845 Australia

This paper presents a new random weighting estimation method for dynamic navigation positioning. This method adopts the concept of random weighting estimation to estimate the covariance matrices of system state noises and observation noises for controlling the disturbances of singular observations and the kinematic model errors. It satisfies the practical requirements of the residual vector and innovation vector to sufficiently utilize observation information, thus weakening the disturbing effect of the kinematic model error and observation model error on the state parameter estimation. Theories and algorithms of random weighting estimation are established for estimating the covariance matrices of observation residual vectors and innovation vec- tors. This random weighting estimation method provides an effective solution for improving the positioning accuracy in dynamic navigation. Experimental results show that compared with the Kalman filtering, the extended Kalman filtering and the adaptive windowing filtering, the proposed method can adaptively determine the covariance matrices of observation error and state error, effectively resist the disturbances caused by system error and observation error, and significantly improve the positioning accu- racy for dynamic navigation.

关键词： estimation navigation error random weighting estimation dynamic navigation positioning covariance matrix kinematic model error observation model error

Distribution pattern of axonal cytoskeleton proteins in the human optic nerve head

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Neural Regeneration Research 2015年第8期10卷 1198-1200页

作者： Min Hye Kang Dao-yi Yu Centre for Ophthalmology and Visual Science The University of Western Australia Nedlands WA Australia Lions Eye Institute 2 Verdun Street Nedlands WA Australia

glaucoma is one of the leading causes of blindness in the developed *** is a progressive optic neuropathy where structural loss of retinal ganglion cell（RgC）axons corresponds with functional visual field *** is distinguished from other optic neuropathies by its selective loss of RgC *** and inferior peripheral nerve sectors are found to be most vulnerable to pressure induced injury whereas the inner temporal sector is most resilient（Quigley et al.,1988）.

关键词： axonal optic cytoskeleton distinguished sector neuropathy inferior progressive ganglion glaucoma