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Joined AZ31B Magnesium Alloys with Ag Interlayer by Ultrasonic-Induced Transient Liquid Phase Bond.ng in Air

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Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1177-1185页

作者： Qian Wang Peng yu Haoran Lin Chongzhi Guo Xiaoqiang Hu Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou341119China School of Rare Earths University of Science and Technology of ChinaHefei230026China Shenyang 7d New Materials Equipment Co.LTd. Shenyang110076China Shenyang National Laboratory of Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

AZ31B magnesium alloys are commonly used in lightweight structures of automobile and aerospace *** this work,the ultrasonic-induced transient liquid phase bond.ng technique is deployed to joint AZ31B magnesium alloys at 490℃ with Ag interlayer in the *** effect of ultrasonic vibration on microstructure and mechanical properties of weld.ng seam is *** vibration duration increases,the width of the weld.ng seam increases firstly and then *** the ultrasound vibration sustained for one second,the eutectic reaction occurred in the contacting interface between Ag interlayer and the base metal AZ31B,resulting in formation of liquid phase and metallurgical *** the ultrasound vibration sustained for seven second,the width of the weld.ng seam increased to a maximum of about 303.1μm and the average shear bond strength of the weld.ng joint attained the peak value of about 66.87 *** the ultrasound vibration sustained over seven seconds,the liquid phase is gradually squeezed out and the width of the weld.ng seam decreases.α-Mg and AgMg_(3) can be observed in the weld.ng *** analysis shows thatα-Mg has a certain strengthening *** whole process of appearance,growth and integration ofα-Mg is analyzed.

关键词： Ultrasonic bond.ng Magnesium alloy Silver Microstructure Intermetallic compound

科技人员流动情况及比较研究——以江苏省常州市、扬州市和徐州市为例

维普期刊数据库评论

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维普期刊数据库

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华东经济管理 2011年第9期25卷 25-30页

作者：郭际吴先华郭雨南京信息工程大学经济管理学院经济管理学院教务处江苏南京210044

科技人员的合理流动是科技知识交流的重要途径。为客观、全面地了解科技人员的流动情况,课题组调查了江苏省常州、扬州和徐州三市的科技人员,首先对调研所得数据进行描述统计,然后通过单因素方差分析,研究了地区、性别和年龄等七个背景... 详细信息

科技人员的合理流动是科技知识交流的重要途径。为客观、全面地了解科技人员的流动情况,课题组调查了江苏省常州、扬州和徐州三市的科技人员,首先对调研所得数据进行描述统计,然后通过单因素方差分析,研究了地区、性别和年龄等七个背景因素对科技人员流动的影响,得到了一系列富有启示意义的结论,进而提出了相应的对策措施。

关键词：科技人员流动情况比较研究

主体异质性、复杂网络与网络效应下的标准竞争——基于计算经济学的研究

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系统管理学报 2008年第2期17卷 225-234页

作者：鲜于波梅琳中山大学岭南学院广州510275

分析了Agent的网络效应异质性和预期异质性对网络效应下标准竞争和扩散的影响。采用复杂网络"小世界效应"模型和基于Agent的计算机建模技术,并结合行为博弈学习理论EWA算法,由此对复杂网络下标准竞争过程中的主体异质性对标准扩散的影... 详细信息

分析了Agent的网络效应异质性和预期异质性对网络效应下标准竞争和扩散的影响。采用复杂网络"小世界效应"模型和基于Agent的计算机建模技术,并结合行为博弈学习理论EWA算法,由此对复杂网络下标准竞争过程中的主体异质性对标准扩散的影响进行计算机建模研究。基于异质性个体在局部网络中的交互作用和Agent行为的学习演化与预期调整,通过计算机仿真,发现网络效应异质性对标准扩散有正面促进作用。本文研究也发现预期的强度和预期调整因子的取值大小对标准竞争扩散的速度和结果有非常明显的影响。在一定情况下,异质性的预期能够克服先发优势;Agent的异质性预期也能帮助实现新旧技术的转换。

关键词：网络效应标准竞争复杂网络计算经济学 Agent异质性

N×N optical switch based on cascaded microring reso-nators

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Optoelectronics Letters 2018年第3期14卷 175-179页

作者： LI Jing-sen LU Huan-yu ZHAO yu-lin Chengdu Aeronautic Polytechnic Chengdu 610110 China School of Astronautics & Aeronautics University of Electronic Science and Technology of China Chengdu 611731China

An N×N optical switch based on cascaded microring resonators on chip is *** an example,the 4×4 optical switch is further *** is successfully demonstrated that its insertion loss is relatively low as 2.2 d B,the crosstalk is negligible,and the extinction ratio(ER)is as large as 130 d *** tuning is employed to make the microrings be in resonance or not,which leads to a response time of several hundred ***,doping the desired waveguide regions with p-type or n-type dopants is able to achieve a better response time of several *** proposed design is easily integrated to a large scale with less microring resonators,which ensures the compact size and the low power consumption.

关键词： microring reso-nators N×N optical switch

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混合电力市场下碳排放流的分配

电网技术 2016年第6期40卷 1683-1688页

作者：陈达鲜文军吴涛余秀月郭瑞鹏浙江大学电气工程学院浙江省杭州市310027 国网青海省电力公司青海省西宁市810008 国网冀北电力科学研究院北京市西城区100045 国网福建省电力公司福建省福州市350003

从消费角度分析了碳排放对制定相应的二氧化碳减排政策具有的重要参考价值。结合电力系统的特点,提出了碳排放流的概念,并将其应用于电力负荷的碳排放计算。针对联营交易与双边交易共存的混合电力市场,提出了一种基于交易的碳排放流计... 详细信息

从消费角度分析了碳排放对制定相应的二氧化碳减排政策具有的重要参考价值。结合电力系统的特点,提出了碳排放流的概念,并将其应用于电力负荷的碳排放计算。针对联营交易与双边交易共存的混合电力市场,提出了一种基于交易的碳排放流计算模型。该模型考虑了负荷所参与电力交易方式的差异。首先,根据各交易对支路潮流的使用份额,将对应于网络损耗的碳排放分配给所有电力交易。然后,将网络损耗从原始有损网络中移去,实现联营交易与双边交易的解耦。最后,将双边电力交易继续从网络中减去,得到只存在联营交易的无损网络。在新网络中,应用潮流追踪将相应的碳排放分配给联营交易内部的各子交易。将上述计算过程合并,即可得到对应负荷电力消费的碳排放。所得结果可向负荷提供与其电力消费有关的碳排放信息,这将可能影响负荷的消费行为并有助于低碳电力的发展。最后,以简单节点系统为算例,验证了所提计算模型的有效性。

关键词：碳排放流混合电力市场网损分摊低碳电力

Fn、TPO基因修饰对人骨髓间充质干细胞的影响

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中华血液学杂志 2007年第12期28卷 832-836页

作者：张磊于洁莫姝杨光李欣宪莹金先庆重庆医科大学附属儿童医院血液科 400014 重庆医科大学附属儿童医院儿科研究所 400014

目的观察纤维连接蛋白(Fn)、血小板生成素(TPO)融合基因修饰对人骨髓间充质干细胞(MSC)的影响。方法构建携带 Fn-TPO 融合基因的重组逆转录病毒载体,并以其对骨髓 MSC进行基因修饰;观察 Fn-TPO 基因在骨髓 MSC 中的表达,以及基因修饰后... 详细信息

目的观察纤维连接蛋白(Fn)、血小板生成素(TPO)融合基因修饰对人骨髓间充质干细胞(MSC)的影响。方法构建携带 Fn-TPO 融合基因的重组逆转录病毒载体,并以其对骨髓 MSC进行基因修饰;观察 Fn-TPO 基因在骨髓 MSC 中的表达,以及基因修饰后骨髓 MSC 的体外增殖、黏附造血细胞和分泌 TPO 的能力;并将脐血 Cd34^+细胞接种到基因修饰后骨髓 MSC 形成的滋养层,培养7d 观察修饰后骨髓 MSC 对造血细胞体外扩增和集落形成能力的影响。结果成功构建携带 Fn-TPO基因的重组逆转录病毒载体且以该逆转录病毒载体对骨髓 MSC 进行体外基因修饰;Fn、TPO 基因在骨髓 MSC 内能够正常转录;基凶修饰后的骨髓 MSC 体外增殖能力[(6.92±0.77)×10~4/ml]与对照组[(7.18±0.89)×10~4/ml]比较差异无统计学意义(P>0.05);基冈修饰组和对照组黏附造血细胞能力分别为0.188±0.018和0.167±0.017(Png/ml 和(5.58±0.37)ng/ml(Pd34^+造血干/祖细胞经基因修饰后骨髓 MSC 联合必要细胞因子体外扩增7 d,有核细胞数、Cd34^+细胞比例、BFU-E、CFU-GM 及 CFU-GEMM 分别为(29.9±2.7)×10~4、(33.3±2.8)%、109.3±4.1/1×10~4 Cd34^+细胞、163.7±7.1/1×10~4 Cd34^+细胞、13.3±1.5/1×10~4 Cd34^+细胞,较对照组明显增加(Pd34^+细胞扩增的能力。

关键词：骨髓间充质干细胞造血干细胞纤维连接蛋白血小板生成素基因修饰

Microstructures and microhardness for sheets and TIG welded joints of TA15 alloy using friction stir spot processing

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Transactions of Nonferrous Metals Society of China 2018年第1期28卷 55-65页

作者： Xia-wei YAng Wen-ya LI Hong-yu LI Shuo-tian YAO Yi-xuan SUN Yi-xian SUN Lu MEI State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi’an 710072 China Shaanxi Key Laboratory of Friction Weld.ng Technologies Xi’an 710072 China

Effects of friction stir spot processing(FSSP)on the microstructures and microhardness of tungsten inert gas(TIG)welded TA15titanium alloy joints were *** macro/micro structural observation and microhardness evaluation of the TA15alloy sheets and TA15TIG welded joints were carried out using optical microscope and microhardness *** results show that FSSP effectively improves the microstructure and increases the microhardness of the *** for the TIG welded joints,FSSP also effectively improves the microstructure of *** the average microhardness value in weld nugget zone is improved significantly,while a small increase of this value in heat affected zone is *** hardness in stirring zone is significantly higher than that in the base *** peak values of hardness appear along the width direction in stirring *** FSSP,the average hardness of the weld zone of TA15TIG welded joint is significantly higher than that before *** the present process parameters,both the surface oxidation in TA15sheets and in TIG welded joints after FSSP are not evident,while the surface forms the bright white layer,which is composed of a great multitude of fine grains.

关键词： friction stir spot processing TA15 titanium alloy TIG welded joint microstructure microhardness

Silver salt composites with enhanced photocatalytic activity

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Silver salt composites with enhanced photocatalytic activity

Force-induced Caspase-1-dependent pyroptosis regulates orthodontic tooth movement

中国化学会第七届全国结构化学学术会议

作者： xian-Wen Wei Chao d.ng yu Hu Kong-Lin Wu Min Ling Chao Song College of Chemical and Engineering Anhui University of Technology College of Chemistry and Materials Science Key Laboratory of Functional Molecular Solids The Ministry of Education Anhui Laboratory of Molecular-Based Materials Anhui Normal University

AgCO has attracted considerable attention as a potential visible light photocatalyst with a band gap of 2.08–2.46 e *** based composite photocatalysts obtained by coupling AgCO with other materials have been achieved with high photocatalytic activity and *** AgCO–WO composites with different weight ratios of AgCO to WO were successfully

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来源： cnki会议评论

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cnki会议

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International Journal of Oral Science 2024年第2期16卷 238-250页

作者： Liyuan Chen Huajie yu Zixin Li yu Wang Shanshan Jin Min yu Lisha Zhu Chengye d.ng Xiaolan Wu Tianhao Wu Chunlei Xun Yanheng Zhou danqing He Yan Liu department of Orthodontics Central LaboratoryPeking University School and Hospital for Stomatology&National Center for Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Research Center of Oral Biomaterials and Digital Medical Devices&Beijing Key Laboratory of Digital Stomatology&Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health&NMPA Key Laboratory for Dental Materials&National Engineering Research Center of Oral Biomaterials and Digital Medical DevicesBeijingChina Peking University Hospital of Stomatology Fourth division BeijingChina

Pyroptosis,an inflammatory caspase-dependent programmed cell death,plays a vital role in maintaining tissue homeostasis and activating inflammatory *** tooth movement(OTM)is an aseptic force-induced inflammatory bone remodeling process mediated by the activation of periodontal ligament(PdL)progenitor ***,whether and how force induces PdL progenitor cell pyroptosis,thereby influencing OTM and alveolar bone remodeling remains *** this study,we found that mechanical force induced the expression of pyroptosis-related markers in rat OTM and alveolar bone remodeling *** or enhancing pyroptosis level could suppress or promote OTM and alveolar bone remodeling *** Caspase-1^(−/−)mice,we further demonstrated that the functional role of the force-induced pyroptosis in PdL progenitor cells depended on ***,mechanical force could also induce pyroptosis in human ex-vivo force-treated PdL progenitor cells and in compressive force-loaded PdL progenitor cells in vitro,which influenced ***,transient receptor potential subfamily V member 4 signaling was involved in force-induced Caspase-1-dependent pyroptosis in PdL progenitor ***,this study suggested a novel mechanism contributing to the modulation of osteoclastogenesis and alveolar bone remodeling under mechanical stimuli,indicating a promising approach to accelerate OTM by targeting Caspase-1.

关键词： homeostasis movement thereby