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High-temperature mechanical properties and deformation behavior of high Nb containing TiAl alloys fabricated by spark plasma sintering

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International Journal of Minerals,Metallurgy and Materials 2012年第4期19卷 354-359页

作者： Xin Lu li-hua Zhao Lang-ping Zhu Bin Zhang xuan-hui Qu State Key Laboratory for Advanced Metals end Materials School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China Beijing Institute of Aeronautical Materials Beijing 100095 China

A high Nb containing TiA1 alloy was prepared from the pre-alloyed powder of Ti-45Al-8.5Nb-0.2B-0.2W-0.02Y （at%） by spark plasma sintering （SPS）. Its high-temperature mechanical properties and compressive deformation behavior were investigated in a temperature range of 700 to 1050℃ and a strain rate range of 0.002 to 0.2 s 1. The results show that the high-temperature mechanical properties of the high Nb containing TiA1 alloy are sensitive to deformation temperature and strain rate, and the sensitivity to strain rate tends to rise with the deformation temperature increasing. The hot workability of the alloy is good at temperatures higher than 900℃, while fracture occurs at lower temperatures. The flow curves of the samples compressed at or above 900℃ exhibit obvious flow softening after the peak stress. Un- der the deformation condition of 900-1050℃ and 0.002-0.2 s 1, the interrelations of peak flow stress, strain rate, and deformation tempera- ture follow the Arrhenius＇ equation modified by a hyperbolic sine function with a stress exponent of 5.99 and an apparent activation energy of 441.2 ***-1.

关键词： titanium-aluminum alloys spark plasma sintering (SPS) mechanical properties deformation activation energy

First Investigation of Nonlinear Optical Oxychalcogenide with Three-Dimensional Anionic Framework and Special Windmill-like Functional Motifs

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Chinese Journal of Chemistry 2022年第20期40卷 2407-2414页

作者： Jia-Nuo li Xiao-Hui li Ying-xuan Xu Wenlong liu Sheng-ping Guo School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhouJiangsu225002 China

Oxychalcogenides have been drawn much attention to be explored as nonlinear optical(NLO)materials in recent *** date,all the NLO oxychalcogenides crystallize in low dimensional ***,a new oxysulfide K_(2)Ba_(0.5)Ga_(9)O_(2)S_(13) was obtained via three-dimensional(3D){[Ga_(9)O_(2)S_(13)]^(3-)}_(∞)polyanionic *** the first oxychalcogenide with 3D NLO-acitve polyanionic framework,K_(2)Ba_(0.5)Ga_(9)O_(2)S_(13) has a wide band gap of 3.72 eV,and exhibits a high laser-induced damage threshold(liDT,17×AgGaS_(2)).It presents moderate phase-matchable NLO response of 0.5×AgGaS_(2) at 2.1μm and 2×KH_(2)PO_(4) at 1.064μ*** theoretical calculation results indicate that the NLO response is mainly contributed from[Ga(2)S4]unit-built[Ga(2)_(3)S_(10)]windmill-like *** work may stimulate the exploration of more NLO oxychalcogenides with balanced performances.

关键词： Oxysulfide Structural chemistry Nonlinear optics Structure-activity relationships Solid-phase reactions

Gastrointestinal involvement in systemic lupus erythematosus:Insight into pathogenesis, diagnosis and treatment

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World Journal of Gastroenterology 2010年第24期16卷 2971-2977页

作者： Tian, Xin-ping Zhang, xuan Chinese Acad Med Sci Peking Union Med Coll Peking Union Med Coll Hosp Dept Rheumatol Beijing 100730 Peoples R China

Systemic lupus erythematosus (SLE) is an autoimmune inflammatory disease characterized by the presence of a plethora of autoantibodies and immune complex formation. Virtually every system and organ can be affected by SLE. Gastrointestinal symptoms are com-mon in SLE patients, and more than half of them are caused by adverse reactions to medications and viral or bacterial infections. Though not as common as lu-pus nephritis, SLE-related gastrointestinal involvement is clinically important because most cases can be life-threatening if not treated promptly. Lupus mesenteric vasculitis is the most common cause, followed by pro-tein-losing enteropathy, intestinal pseudo-obstruction, acute pancreatitis and other rare complications such as celiac disease, inflammatory bowel diseases, etc. No specific autoantibody is identified as being associated with SLE-related gastroenteropathy. Imaging studies, particularly abdominal computed tomography scans, are helpful in diagnosing some SLE-related gastroen-teropathies. Most of these complications have good therapeutic responses to corticosteroids and immu-nosuppressive agents. Supportive measures such as bowel rest, nutritional support, antibiotics and proki-netic medications are helpful in facilitating functional recovery and improving the outcome.

关键词： Systemic lupus erythematosus Systemic Vasculitis Gastroenteropathy

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粪便真空收运系统及生化技术研究

华中科技大学学报（城市科学版） 2003年第1期20卷 44-46页

作者：李冠峰周敬宣李艳萍华中科技大学环境科学与工程学院湖北武汉430074

粪便既可制为粪肥 ,但又可污染环境和传染疾病 ,对粪便进行减量化、无害化和资源化处置具有重要的现实意义 .讨论了我国粪便处置现状中的问题和真空收运系统的先进可行性。

关键词：粪便真空收运系统碱性生化粪肥

基于PSASP的多机系统PSS选址及仿真研究

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实验室科学 2017年第3期20卷 12-15页

作者：李惜玉李选平林泽锐王乾康黄睿钟俊文广东工业大学自动化学院广东广州510000

为了使PSS抑制系统低频振荡的效果达到最优,PSS安装地点的选址必须经过严格的选择。只有通过合理选址,才能有效增强对相应振荡模式的阻尼。基于PSASP对两区域四机系统进行小干扰稳定计算,对仿真得到的系统特征值及机电回路相关比等参数... 详细信息

为了使PSS抑制系统低频振荡的效果达到最优,PSS安装地点的选址必须经过严格的选择。只有通过合理选址,才能有效增强对相应振荡模式的阻尼。基于PSASP对两区域四机系统进行小干扰稳定计算,对仿真得到的系统特征值及机电回路相关比等参数分析,然后得到低频振荡模式,利用参与因子法原理选取PSS有效安装地点,仿真结果表明使低频振荡得到了很好的抑制。

关键词： PSS选址 PSASP 特征值分析参与因子法

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毛冬青对妇产科手术感染伤口疼痛的影响

黑龙江医学 2018年第4期42卷 362-363页

作者：邹清容禤丽萍吕一燕陈端吴用琼郑清秋北流市人民医院广西北流537400

目的探讨中草药毛冬青煎液对妇产科手术感染切口疼痛的影响。方法选择2014年6月—2017年6月在北流市人民医院妇产科住院手术感染性伤口(腹部手术)80例患者作为研究对象,随机分为对照组与观察组,每组各40例。所有患者感染伤口常规处理后... 详细信息

目的探讨中草药毛冬青煎液对妇产科手术感染切口疼痛的影响。方法选择2014年6月—2017年6月在北流市人民医院妇产科住院手术感染性伤口(腹部手术)80例患者作为研究对象,随机分为对照组与观察组,每组各40例。所有患者感染伤口常规处理后,对照组用3%过氧化氢清洗后用0.9%生理盐水清洗。观察组用自制毛冬青水清洗伤口并湿敷30分钟。观察两组患者伤口疼痛改善情况。结果两组患者伤口疼痛差异有统计学意义(P<0.01)。结论毛冬青煎液用于妇产科手术感染伤口换药能有效减轻疼痛,疗效满意,值得临床推广。

关键词：毛冬青妇产科手术感染伤口疼痛

Carbon steel anticorrosion performance and mechanism of sodium lignosulfonate

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Rare Metals 2024年第1期43卷 356-365页

作者： Bo-Kai liao Rui-xuan Quan ping-Xian Feng Huan Wang Wei Wang li Niu School of Chemistry and Chemical Engineering Guangzhou Key Laboratory of Sensing Materials and DevicesJoint Institute of Guangzhou University and Institute of Corrosion Science and TechnologyGuangzhou UniversityGuangzhou 510006China

lignin is a typical biological macromolecule with a three-dimensional network structure and abundant functional groups. It has excellent ionic complexation ability and amphiphilic molecular structure *** this study, the carbon steel anticorrosion performance of sodium lignosulfonate(SLS) in an acid solution was evaluated using the weight loss method, electrochemical measurements, scanning vibration electrode technique(SVET), and surface characterization methods. SLS exhibited excellent corrosion inhibition efficiency for Q235carbon steel in 1 mol·L^(-1) HCl, reaching a maximum value of 98%. A low SLS concentration of 20 mg·L^(-1) resulted in the maximum corrosion inhibition efficiency, which remained nearly constant at higher SLS *** SVET test demonstrated that the formation of an SLS adsorption film can impede corrosion. This study confirms the significance of the application of green biomass resources in the field of metal corrosion protection and green functional materials.

关键词： lignin Sodium lignosulfonate Corrosion inhibitor Carbon Steel

A comparative analysis of tissue gene expression data from high-throughput studies

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Chinese Science Bulletin 2012年第22期57卷 2920-2928页

作者： ping Jie WANG YaJun YU Yao li YiXue li xuan HAO Pei College of life Science and Biotechnology Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Systems Biology/Key Laboratory of Synthetic Biology Shanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200031China

High-throughput technologies were employed over the past decade to study the expression profiles of cells and *** are large collections of accumulated data from public databases and numerous research articles were published on these *** the current study,we performed meta-analysis on the gene expression data from human liver and kidney tissues produced from five different technologies:EST,SAGE,MPSS,microarray,and *** found RNA-Seq was the most sensitive in the number of genes it detected while SAGE and MPSS were the least *** the genes detected by all the platforms,there were generally good correlations to the measured expression levels of corresponding *** further compared detected genes to liver/kidney proteomics data from the Human Protein Atlas,and found 960 of the 8764 genes only detected by RNA-Seq were validated by proteomics *** conclusion,RNA-Seq is a more sensitive and consistent technology compared to the other four high-throughput platforms,though their results are in general *** coverage was determined to be the preferred measurement to represent gene expression levels by RNA-Seq data and will be used in future works.

关键词：基因表达数据研究组织高通量蛋白质组学基因检测肾脏组织 SAGE MPSS

从句子图到篇章图——基于抽象语义表示的篇章级共指标注体系研究

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外语学刊 2025年第1期 19-28页

作者：张艺璇李斌许智星南京师范大学文学院南京210097 南京师范大学语言大数据与计算人文研究中心南京210097

篇章级共指关系是语言学和计算语言学的研究难点之一。本文在梳理共指理论研究与趋势的基础上,回顾共指语料库的构建与自动解析方法,指出共指语料的构建主要存在以下两个问题:共指关系的标注较为粗疏,也基本不考虑与句子语义结构本身的... 详细信息

篇章级共指关系是语言学和计算语言学的研究难点之一。本文在梳理共指理论研究与趋势的基础上,回顾共指语料库的构建与自动解析方法,指出共指语料的构建主要存在以下两个问题:共指关系的标注较为粗疏,也基本不考虑与句子语义结构本身的关系。本文在句子级语义标注体系(中文抽象语义表示)的基础上,设计篇章共指的标注体系,以“概念同一性”为基本原则,从词形的异同和概念的表述角度区分9种篇章共指关系,标注了500个篇章的共指信息。与已完整标注的52种句内语义关系相结合,构建出带有篇章共指信息的篇章抽象语义图库。该语料库选自CTB新闻语料,体裁涵盖经济、体育及生活类,规模为6237句,16万词例。该语料库的构建为篇章级语义分析提供了新框架与数据资源。

关键词：篇章共指抽象语义表示概念同一性篇章语义结构语料库中文信息处理