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Microstructure,tensile properties and thermal stability of AlMgSiScZr alloy printed by laser powder bed fusion

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Journal of Materials Science & Technology 2021年第10期69卷 200-211页

作者： Jiang Bi Zhenglong Lei yanbin Chen Xi Chen Ze Tian Nannan Lu Xikun Qin Jingwei liang State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China

The new generation of Sc and Zr modified Al alloys has been attracted wide concerns in aerospace industry,owing to the excellent mechanical performances and superior thermal stability than other normal Al *** microalloying with Sc and Zr,the Al3(Sc,Zr)particle forms as the grain refiner during the solidification,which is extremely beneficial for the laser powder bed fusion(LPBF)processed Al *** this study,a new type Al-14.1 Mg-0.47 Si-0.31 Sc-0.17 Zr alloy was additively manufactured by LPBF,and the microstructure,tensile properties and thermal stability were studied in *** using a single melt-67°scanning strategy,the LPBF-processed specimen with a relative density of 99.4%and tensile strength of 487.7 MPa was obtained at 160 W-200 mm/*** this AlMgSiScZr alloy can still exhibit an excellent tensile strength of 393.9 MPa at a moderate temperature of 473 *** the aging treatment,the tensile properties further increased due to the precipitate hardening of Mg2Si and Al3(Sc,Zr),and the maximum value(580 MPa)was reached at an aging time of 10 *** average crystal size was almost unchanged after aging treated at 325℃and 24 h,indicating this AlMgSiScZr alloy has an improved thermal *** AlMgSiScZr alloy is recommended to substitute some particular titanium alloys in aerospace field afterwards.

关键词： Laser powder bed fusion AlMgSiScZr alloy Microstructure Tensile behavior Thermal stability Phase evolution

适用于潮湿环境的聚酰亚胺复合薄膜的制备及性能研究

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绝缘材料 2019年第10期52卷 46-51页

作者：曹华燕梁延斌廖子维曲可新王雪飞徐乐马英一张明艳张文龙哈尔滨理工大学材料科学与工程学院黑龙江哈尔滨150080 扬州龙达电工材料有限公司江苏扬州225000

以水滴为模板,含氟聚酰亚胺为成膜材料,在聚酰亚胺薄膜的表面引入含氟聚酰亚胺多孔膜,制备了含多孔结构的聚酰亚胺复合薄膜,研究了多孔复合薄膜的成膜条件对其形貌和抗湿性能的影响。结果表明:聚酰亚胺多孔结构的引入使复合薄膜的接触... 详细信息

以水滴为模板,含氟聚酰亚胺为成膜材料,在聚酰亚胺薄膜的表面引入含氟聚酰亚胺多孔膜,制备了含多孔结构的聚酰亚胺复合薄膜,研究了多孔复合薄膜的成膜条件对其形貌和抗湿性能的影响。结果表明:聚酰亚胺多孔结构的引入使复合薄膜的接触角增加,疏水性增强,吸水率显著降低,在潮湿环境中介电常数的增量较小,复合薄膜的形貌和吸水性能还可通过改变成膜条件进行调节,进而满足不同领域的需求。

关键词：聚酰亚胺复合薄膜潮湿环境介电常数

A FAULT DETECTION SENSOR FOR CIRCUIT AGING USING DOUBLE-EDGE-TRIGGERED FLIP-FLOP

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Journal of Electronics(China) 2013年第1期30卷 97-103页

作者： Yan Luming liang Huaguo Huang Zhengfeng Liu yanbin School of Computer and Information Hefei University of Technology School of Electronic Science & Applied Physics Hefei University of Technology

In nanoscale technology, transistor aging is one of the most critical problems that impact on the reliability of circuits. Aging sensor is a good online way to detect the circuit aging, which performs during the operating time with no influence of the normal operation of circuits. In this paper, a Double-edge-triggered Detection Sensor for circuit Aging (DSDA) is proposed, which employs data signal of logic circuits as its clock to control the sampling process. The simulation is done by Hspice using 45 nm technology. The results show that this technique is not sensitive to the process variations. The worst case of the detection precision is more than 80% under the different process variations. It can detect aging fault effectively with the 8% power cost and 30% performance cost.

关键词：检测传感器检测电路边沿触发老化故障 Hspice 纳米技术传感器电路

Directional construction of Cu2S branch arrays for advanced oxygen evolution reaction

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Journal of Energy Chemistry 2019年第12期28卷 61-67页

作者： Shengjue Deng yanbin Shen Dong Xie Yangfan Lu Xiaolong Yu liang Yang Xiuli Wang Xinhui Xia Jiangping Tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand School of Materials Science EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Guangdong Engineering and Technology Research Center for Advanced Nanomaterials School of Environment and Civil EngineeringDongguan University of TechnologyDongguan 523808GuangdongChina State Key Laboratory of Marine Resource Utilization in South China Sea Hainan UniversityHaikou 570228HainanChina

Metal sulphide electrocatalyst is considered as one of the most promising low-cost candidates for oxygen evolution reaction(OER).In this work,we report a novel free-standing Cu2S branch array via a facile TiO2-induced electrodeposition-sulfurization ***,cross-linked Cu2S nanoflake branch is strongly anchored on the TiO2 backbone forming high-quality Cu2S/TiO2/Cu2S core-branch *** branch formation mechanism is also *** compared to the pure Cu2S nanowire arrays,the asprepared Cu2S/TiO2/Cu2S core-branch arrays show much better alkaline OER performance with lower overpotential(284 mV at 10 mA cm^-2)and smaller Tafel slope(72 dec-1)as well as enhanced longterm durability mainly due to larger exposed area and more active electrocatalytic *** work provides a new way for construction of advanced metal sulphide electrocatalysts for electrochemical energy conversion.

关键词： Copper sulphide Titanium oxide Core-branch arrays Water splitting Oxygen evolution reaction

基于灰色关联分析的齿环热精锻成形工艺参数优化

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计算机集成制造系统 2022年第4期28卷 1020-1029页

作者：梁强张贤明杜彦斌刘新重庆工商大学废油资源化技术与装备教育部工程中心重庆400067 重庆工商大学机械工程学院重庆400067 重庆大学材料科学与工程学院重庆400044

针对某铜制同步器齿环热精锻成形过程中成形缺陷、材料利用率低和成形载荷大的问题,提出一套基于灰色关联分析的齿环热精锻成形工艺参数多目标优化设计方法。采用中心复合实验方法以坯料内径、坯料高度、成形温度和下压速度为设计变量... 详细信息

针对某铜制同步器齿环热精锻成形过程中成形缺陷、材料利用率低和成形载荷大的问题,提出一套基于灰色关联分析的齿环热精锻成形工艺参数多目标优化设计方法。采用中心复合实验方法以坯料内径、坯料高度、成形温度和下压速度为设计变量进行实验设计,以锻造缺陷及充填性、内飞边体积、外飞边半径和最大成形载荷为优化目标,应用灰色关联分析和熵值法将多目标问题转化为关于灰色关联度的单目标优化问题,建立灰色关联度与各工艺参数的响应面模型。通过对模型进行寻优获得最优工艺参数组合,并进行模拟与实际验证,结果表明:该优化方法得到的工艺参数组合可以保证齿环热精锻无锻造缺陷、充填饱满,同时提高材料利用率、降低成形载荷。

关键词：齿环热精锻灰色关联分析参数优化

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陇东旱塬区复种马铃薯栽培模式筛选

中国瓜菜 2024年第3期37卷 144-150页

作者：王芳芳吕和平高彦萍梁宏杰吴雁斌杨昕宇李鹏张武甘肃省农业科学院马铃薯研究所兰州730070 甘肃省马铃薯脱毒种薯(种苗)病毒检测及安全性评价工程中心兰州730000 北薯种业(云南)有限公司云南曲靖655000

为研究陇东旱塬区冬油菜收获后复种马铃薯不同栽培模式对其产量及经济效益的影响,采用单因素试验区组设计,以陇薯7号原种马铃薯品种为试验材料,共设计8种栽培模式。通过对不同模式下马铃薯农艺性状、商品率、产量及经济效益的比较,筛选... 详细信息

为研究陇东旱塬区冬油菜收获后复种马铃薯不同栽培模式对其产量及经济效益的影响,采用单因素试验区组设计,以陇薯7号原种马铃薯品种为试验材料,共设计8种栽培模式。通过对不同模式下马铃薯农艺性状、商品率、产量及经济效益的比较,筛选出最佳的冬油菜茬复种马铃薯栽培模式。结果表明,秸秆带状覆盖、平作起垄、垄沟种植3个栽培模式表现较好,667 m^(2)产量分别为2292.81、1917.63、1655.46 kg,比对照露地平作分别增产41.27%、18.15%和2.00%。

关键词：马铃薯陇东旱塬区复种栽培模式产量

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Overexpression of N-cadherin is correlated with metastasis and worse survival in colorectal cancer patients

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Chinese Science Bulletin 2013年第28期58卷 3529-3534页

作者： ZHUO HongQing JIANG KeWei DONG LingYi ZHU Yi Lü liang Lü You ZHANG yanbin ZHANG Hui YE YingJiang WANG Shan Department of Gastrointestinall Surgery Laboratory of Surgical OncologyPeking University People's Hospital Peking University

N-cadherin is related to the progression and metastases of several solid ***,it was still unclear whether N-cadherin is overexpressed in colorectal malignant tumors that have stronger malignant *** this study,we used immunohistochemistry to detect the expression patterns of N-cadherin in both the primary tumors and their normal mucosa tissues of 120patients with colorectal *** revealed that N-cadherin was expressed in 78.3%(94/120)of colorectal tumor tissues and in only 9.2%(11/120)of paired distant normal mucosa tissues with a significant difference(P=0.000).The low,moderate,and high expression of N-cadherin protein was 42.5%,30.8%,and 26.7%,respectively.N-cadherin overexpression was associated with advanced TNM stage,lymph nodes metastasis and distant metastasis(P<0.05).Patients with N-cadherin overexpressed showed the obvious lower overall survival rate than those with moderate and low expression,and patients with low expression had a better survival rate than those with moderate and high expression(P<0.05).In conclusion,high N-cadherin expression may lead to tumor aggressiveness and metastatic potential in colorectal cancer,and may prove to be a possible prognostic factor.

关键词：大肠癌患者恶化恶性肿瘤过度表达免疫组化法表达模式肿瘤组织

Study on the SiN_x/Al rear reflectance performance of crystalline silicon solar cells

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Science China(Technological Sciences) 2010年第12期53卷 3209-3213页

作者： liang ZongCun, CHEN DaMing, ZHU yanbin & SHEN Hui Institute for Solar Energy Systems, State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China Institute for Solar Energy Systems State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-Sen University

The performance of internal rear surface reflectance of crystalline silicon solar cells is becoming more and more important with the decrease of thickness of the silicon wafers. In this paper PC1D was used to simulate the correlations between the rear surface reflectance and the electrical as well as optical properties of the solar cells. The results showed that the short circuit current, open circuit voltage and quantum efficiency were all enhanced with the increase of the rear reflectance. When the rear reflectance increased from 60% to 100%, the short circuit current, open circuit voltage and maximum output power were improved by about 0.128 A, 0.007 V, and 0.066 W, respectively. The internal quantum efficiency was improved by 39.9%, the external quantum increased by 17.4%, and the efficiency of the solar cells was enhanced by 0.4% at 1100 nm wavelength. The screen-printing was selected to prepare SiNx/Al reflector, and experimental results showed that the SiNx/Al reflector has desired characteristic of internal rear reflectance, with the reflectivity of 15% higher than that of conventional aluminum BSF at 1100 nm wavelength.

关键词： crystalline silicon solar cells rear reflectance PC1D simulation rear reflector

技能大赛背景下高职生物制药技术综合实训课程教学改革

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生物工程学报 2023年第4期39卷 1825-1837页

作者：孙艳宾梁君玲江洋董良俊张川山东药品食品职业学院山东威海264210 国网山东省电力公司威海供电公司山东威海264200

综合实训是高职学生将理论知识与生产实践有机融合的重要教学环节。本文介绍了技能大赛背景下,学院生物制药技术专业立足“以赛促教、以赛促建、以赛促学、育训结合”特色,以青霉素发酵工艺实验为例,从教学目标、教学内容、教学方法、... 详细信息

综合实训是高职学生将理论知识与生产实践有机融合的重要教学环节。本文介绍了技能大赛背景下,学院生物制药技术专业立足“以赛促教、以赛促建、以赛促学、育训结合”特色,以青霉素发酵工艺实验为例,从教学目标、教学内容、教学方法、考核等内容进行的改革与实践,将发酵设备的实践操作与虚拟仿真软件相融合,双向交互式开展课程。突破发酵过程控制的主观依赖性,建立发酵过程参数控制的量化管理和评价,更有利于实现技能大赛与实践教学的高效融合。通过近几年的改革与实践,取得良好的教学效果,为同类课程基于技能大赛的教学实践改革提供了新的思路和借鉴。

关键词：技能大赛生物制药技术综合实训教学改革