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A new insight into LPSO phase transformation and mechanical properties uniformity of large-scale Mg-Gd-Y-Zn-Zr alloy prepared by multi-pass friction stir processing

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Journal of Magnesium and Alloys 2024年第5期12卷 2041-2056页

作者： xiaohu Guan Wen Wang Ting Zhang Pai Peng Qiang Liu Peng Han ke Qiao Jun Cai Liqiang Wang Kuaishe Wang School of Metallurgical Engineering National and Local Joint Engineering Research Center for Functional Materials ProcessingXi’an University of Architecture and TechnologyNo.13 Yanta RoadXi’anShaanxi 710055China xi’an Rare Metal Materials Institute Co.Ltd Xi’an 710016China State key Laboratory of Metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityNo.800 Dongchuan RoadShanghai 200240China

A large-scale fine-grained Mg-Gd-Y-Zn-Zr alloy plate with high strength and ductility was successfully prepared by multi-pass friction stir processing(MFSP)technology in this *** structure of grains and long period stacking ordered(LPSO)phase were characterized,and the mechanical properties uniformity was ***,a quantitative relationship between the microstructure and tensile yield strength was *** results showed that the grains in the processed zone(PZ)and interfacial zone(IZ)were refined from 50μm to 3μm and 4μm,respectively,and numerous original LPSO phases were *** IZ,some block-shaped 18R LPSO phases were transformed into needle-like 14H LPSO phases due to stacking faults and the short-range diffusion of solute *** severe shear deformation in the form of kinetic energy caused profuse stacking fault to be generated and move rapidly,greatly increasing the transformation rate of LPSO *** MFSP,the ultimate tensile strength,yield strength and elongation to failure of the large-scale plate were 367 MPa,305 MPa and 18.0% *** refinement and LPSO phase strengthening were the major strengthening mechanisms for the MFSP *** particularly,the strength of IZ was comparable to that of PZ because the strength contribution of the 14H LPSO phase offsets the lack of grain refinement strengthening in *** result opposes the widely accepted notion that IZ is a weak region in MFSP-prepared large-scale fine-grained plate.

关键词： Friction stir processing Multi-pass Mg-Gd-Y-Zn-Zr alloy LPSO phase transformation Mechanical properties

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Two-Qubit Logic Gates and Teleportation of an Entangled State of Atom-Cavity with Cavity QED

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Communications in Theoretical Physics 2007年第4X期48卷 641-644页

作者： CHEN Ai-xi HUANG ke-Lin deng Li Department of Applied Physics East China Jiaotong University Nanchang 330013 China

In this paper, a scheme is proposed for realization of two-qubit controlled-not gates and teleportation of an entangled state of atom-cavity. In this scheme, applying hyperfine levels of atom, we consider A-type three-level atom interacting resonantly or nonresonantly with cavity field that is prepared in σ- polarized. We consider the experimental feasibility of this scheme and compare our results with other schemes.

关键词： cavity QED entangled state teleportation

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SETDB1-mediated CD147-K71 di-methylation promotes cell apoptosis in non-small cell lung cancer

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Genes & Diseases 2024年第2期11卷 978-992页

作者： Ming-Yan Shi Yarong Wang Ying Shi Ruofei Tian xiaohong Chen Hai Zhang ke Wang Zhinan Chen Ruo Chen National Translational Science Center for Molecular Medicine & Department of Cell Biology Fourth Military Medical UniversityXi'anShaanxi 710032China

Protein post-translational modifications(PTMs)are at the heart status of cellular signaling events and broadly involved in tumor ***147 is a tumor biomarker with various PTMs,promoting tumor metastasis and metabolism ***,the relationship between the PTMs of CD147 and apoptosis has not been *** our study,we produced a specific anti-CD147-K71 di-methylation(CD147-K71me2)antibody by immunizing with a di-methylated peptide and observed that the level of CD147-K71me2 in non-small cell lung cancer(NSCLC)tissues were lower than that in NSCLC adjacent ***1 was identified as the methyltransferase catalyzing CD147 to generate ***-seq showed that FOSB was the most significant differentially expressed gene(DEG)between wild-type CD147(CD147-WT)and K71-mutant CD147(CD147-K71R)***,we found that CD147-K71me2 promoted the expression of FOSB by enhancing the phosphorylation of p38,leading to tumor cell *** vivo experiments showed that CD147-K71me2 significantly inhibited tumor progression by promoting cell *** together,our findings indicate the inhibitory role of CD147-K71me2 in tumor progression from the perspective of post-translational modification,which is distinct from the pro-cancer function of CD147 itself,broadening our perspective on tumor-associated antigen CD147.

关键词： CD147 di-methylation Cell apoptosis FOSB Non-small cell lung cancer SETDB1

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Revealing precipitation behavior and mechanical response of wire-arc directed energy deposited Mg-Gd-Y-Zr alloy by tailoring aging procedures

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International Journal of Extreme Manufacturing 2024年第4期6卷 176-200页

作者： xinzhi Li Xuewei Fang Zhiyan Zhang Shahid Ghafoor Ruikai Chen Yi Liu kexin Tang Kai Li Minghua Ma Jiahao Shang ke Huang State key Laboratory for Manufacturing Systems Engineering School of Mechanical EngineeringXi'an Jiaotong UniversityXi'an 710049 ShaanxiPeople's Republic of China

Mg-Gd-Y-Zr alloy,as a typical magnesium rare-earth(Mg-RE)alloy,is gaining popularity in the advanced equipment manufacturing fields owing to its noticeable age-hardening properties and high specific ***,it is extremely challenging to prepare wrought components with large dimensions and complex shapes because of the poor room-temperature processability of Mg-Gd-Y-Zr ***,we report a wire-arc directed energy deposited(DED)Mg-10.45Gd-2.27Y-0.52Zr(wt.%,GW102K)alloy with high RE content presenting a prominent combination of strength and ductility,realized by tailored nanoprecipitates through an optimized heat treatment ***,the solution-treated sample exhibits excellent ductility with an elongation(EL)of(14.6±0.1)%,while the aging-treated sample at 200°C for 58 h achieves an ultra-high ultimate tensile strength(UTS)of(371±1.5)***,the aging-treated sample at 250°C for 16 h attains a good strength-ductility synergy with a UTS of(316±2.1)MPa and a EL of(8.5±0.1)%.Particularly,the evolution mechanisms of precipitation response induced by various aging parameters and deformation behavior caused by nanoprecipitates type were also systematically *** excellent ductility resulted from coordinating localized strains facilitated by active slip *** the ultra-high strength should be ascribed to the dense nano-β'hampering dislocation ***,the shearable nano-β1 contributed to the good strength-ductility *** work thus offers insightful understanding into the nanoprecipitates manipulation and performance tailoring for the wire-arc DED preparation of large-sized Mg-Gd-Y-Zr components with complex geometries.

关键词： wire-arc directed energy deposition Mg-Gd-Y-Zr alloy precipitation response prominent strength-ductilitycombination deformation mechanism

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东北全面振兴的新质生产力实践研究

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求是学刊 2024年第5期51卷 69-78页

作者：林木西丁柯文王璐辽宁大学辽宁大学经济研究院辽宁大学东北振兴研究中心沈阳110031 辽宁大学国民经济研究院沈阳110031

2023年9月,习近平总书记在黑龙江视察提出发展新质生产力,为东北全面振兴指明了新方向。习近平总书记关注东北振兴,在三次视察东北时不断地提出东北振兴的新思路、新对策,最终聚焦到发展新质生产力,呈现出一个脉络清晰、循序渐进的振兴... 详细信息

2023年9月,习近平总书记在黑龙江视察提出发展新质生产力,为东北全面振兴指明了新方向。习近平总书记关注东北振兴,在三次视察东北时不断地提出东北振兴的新思路、新对策,最终聚焦到发展新质生产力,呈现出一个脉络清晰、循序渐进的振兴东北新路径。深刻领会习近平总书记三次视察东北重要讲话精神,可以发现东北地区发展新质生产力必须遵循的实践路径,具体要做到“四个聚焦”、完成“六大任务”、进一步夯实“五大安全”。东北地区发展新质生产力,不仅需要自身高质量发展,而且必须在全国一盘棋下发挥好发展新质生产力的功能。

关键词：新质生产力发展新动能新时代推动东北全面振兴

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儿茶酚基团改性冷水鱼皮明胶组织粘合剂的制备及性能评价

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功能材料 2024年第4期55卷 4191-4200页

作者：纪倩张可魏振宇陈曦江南大学生命科学与健康工程学院江苏无锡214122

以冷水鱼皮明胶(FSGltn)为主体材料,通过定量修饰制备儿茶酚基团(CAT)改性明胶(CAT-FSGltn),再将CAT-FSGltn与葡聚糖二醛(DDA)原位混合交联,构建在湿润环境下具有高粘附性的组织粘合剂(CAT-FSGltn/DDA)。发现CAT-FSGltn/DDA能够在60 s... 详细信息

以冷水鱼皮明胶(FSGltn)为主体材料,通过定量修饰制备儿茶酚基团(CAT)改性明胶(CAT-FSGltn),再将CAT-FSGltn与葡聚糖二醛(DDA)原位混合交联,构建在湿润环境下具有高粘附性的组织粘合剂(CAT-FSGltn/DDA)。发现CAT-FSGltn/DDA能够在60 s内成胶。充分交联的CAT-FSGltn/DDA水凝胶在PBS溶液中浸泡超过80 h后无明显质量损失。将CAT-FSGltn/DDA粘附在模拟组织膜的橡胶薄膜上,当薄膜被拉伸至原长度的两倍时,水凝胶仍未断裂。利用体外模型评价组织粘合剂的耐压强度,结果显示CAT-FSGltn/DDA的耐压强度可达到105.7 mmHg,大于人体舒张压,表明CAT-FSGltn/DDA具有较强的内聚力和粘附力。组织切片显示固化30 min的CAT-FSGltn/DDA与肠衣表面贴合紧密,水凝胶/肠衣的界面在水流冲击后保持完好。细胞实验结果显示L929细胞的存活率在80%以上,CAT-FSGltn/DDA水凝胶的生物相容性良好。

关键词：冷水鱼皮明胶儿茶酚葡聚糖组织粘合剂水凝胶

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High-power compact continuous-wave Fe:ZnSe laser at 4μm with>50%overall conversion efficiency

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Chinese Optics Letters 2024年第8期22卷 87-92页

作者： Yanlong Shen Yingchao Wan Feng Zhu Tongxing Chai Yousheng Wang ke HuangState key Laboratory of Laser Interaction with Matter Northwest Institute of Nuclear TechnologyXi’an 710024China

We report on a compact,high-efficiency mid-infrared continuous-wave(CW)Fe:ZnSe laser pumped by a 2.9μm fiber laser under liquid nitrogen cooling.A maximum output power of 5.5 W and a slope efficiency of up to 66.3%with respect to the launched pump power were *** overall optical-to-optical(OTO)conversion efficiency,calculated from the output of the 2.9μm fiber laser to the 4μm laser,was as high as~54.5%.The OTO efficiency and the slope efficiency are,to the best of our knowledge,the highest ever reported in Fe:ZnSe lasers.A rate-equation-based numerical model of CW operation was established,and the simulation agreed well with the experiment,identifying the routes used in the experiment for such high efficiency.

关键词： Fe:ZnSe mid-infrared laser high efficiency solid-state laser

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基于句法规则与情感词的隐式特征提取

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计算机工程与设计 2024年第3期45卷 740-747页

作者：陈可嘉柯永诚林鸿熙福州大学经济与管理学院福建福州350108 莆田学院商学院福建莆田351100

针对当前句法关系研究存在过多考虑主谓关系、情感词识别能力有限、忽视隐式特征提取等方面的不足,提出一种基于句法规则与情感词的隐式特征提取方法。借助中文情感词典资源,基于外部语料与实验语料训练的词向量分别构建混合情感词典和... 详细信息

针对当前句法关系研究存在过多考虑主谓关系、情感词识别能力有限、忽视隐式特征提取等方面的不足,提出一种基于句法规则与情感词的隐式特征提取方法。借助中文情感词典资源,基于外部语料与实验语料训练的词向量分别构建混合情感词典和产品特征词典,通过词典和定义的句法规则提取显式特征及情感词,根据其共现关系提取隐式特征。在相机评论语料集上进行实验并与现有方法进行对比,实验结果表明,该方法能有效提取显式及隐式特征,在获取全面特征信息上具有较好的性能。

关键词：隐式特征显式特征句法规则情感词词向量共现分析产品评论

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Surface doping effect on the optoelectronic performance of 2D organic crystals based on cyano-substituted perylene diimides

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Chinese Chemical Letters 2024年第9期35卷 193-197页

作者： Jaeyong Ahn Zhenping Li Zhiwei Wang ke Gao Huagui Zhuo Wanuk Choi Gang Chang xiaobo Shang Joon Hak Oh School of Chemical and Biological Engineering Institute of Chemical ProcessesSeoul National UniversitySeoul 08826South Korea State key Laboratory for Mechanical Behavior of Materials Shaanxi International Research Center for Soft MatterSchool of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China Center for Ordered Nanoporous Materials Synthesis School of Environmental Science and EngineeringPohang University of Science and TechnologyGyeongbuk 37673South Korea Instrumental Analysis Center of xi’an Jiaotong University Xi’an 710049China

Compared to organic thin films,organic single crystals offer significant potential in organic phototransistors(OPTs)due to their enhanced charge transport,large surface area,and defect-free ***,the development of n-type semiconductors has lagged behind p-type *** enhance semiconductor device performance,a doping process can be employed,which typically involves the introduction of charged impurities into the crystalline semiconducting *** aim is to reduce the Ohmic losses,increase carrier density,improve transport capabilities,and facilitate effective carrier injection,ultimately enhancing the electrical properties of the *** doping processes,however,often pose a risk of damaging the structure of single *** this study,we have synthesized novel cyanosubstituted chiral perylene diimides,which self-assemble into two-dimensional single crystals that can be used for n-type semiconductor *** have employed a surface doping strategy using diethylamine vapor without disrupting the crystal *** fabricated devices exhibit significantly higher charge transport properties after doping,achieving a maximum electron mobility of 0.14 cm^(2)V^(-1)s^(-1),representing an improvement of over ***,the optoelectronic performance of the doped devices has significantly improved,with the external quantum efficiency increased by over 9 times and the significantly improved response *** results suggest that our surface doping technology is a promising way for enhancing the performance of 2D organic single-crystal OPTs.

关键词： Doping effect Phototransistors Perylene diimides Organic crystals Cyano substitution

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基于卷积神经网络的近红外光谱多组分定量分析模型研究

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分析化学 2024年第5期52卷 695-705页

作者：于水宦克为王磊刘小溪韩雪艳长春理工大学物理学院山东鼎夏智能科技有限公司吉林省科学技术信息研究所

近红外光谱分析技术已成为食品、农业和医药等领域中质量监控的重要分析手段。本研究提出了一种基于卷积神经网络的近红外光谱多组分定量分析模型(MulCoSpecNet)，此模型由1个编码解码模块、1个专家模块、1个门控模块、1个多组分定量预... 详细信息

近红外光谱分析技术已成为食品、农业和医药等领域中质量监控的重要分析手段。本研究提出了一种基于卷积神经网络的近红外光谱多组分定量分析模型(MulCoSpecNet)，此模型由1个编码解码模块、1个专家模块、1个门控模块、1个多组分定量预测模块和1个超参数优化器组成。编码解码模块通过上采样和下采样方式降低光谱噪声以及随机误差，提高光谱信噪比；专家模块和门控模块利用不同权重构建不同子光谱；多组分定量预测模块采用卷积和池化等操作提高模型的预测精度和泛化能力；超参数优化器在超参数空间中同步优化超参数。本研究以公共的谷物和玉米近红外光谱数据为例，将MulCoSpecNet预测结果与偏最小二乘法(PLS)、极限学习机(ELM)、支持向量回归法(SVM)和神经网络(BP)结果进行比较。结果表明，与PLS相比，MulCoSpecNet在谷物和玉米数据集上预测精度分别提高了25.5%～45.2%和10.0%～35.7%；与ELM相比，MulCoSpecNet预测精度分别提高了17.8%～38.6%和18.2%～37.2%；与SVM相比，MulCoSpecNet预测精度分别提高了33.6%～47.0%和31.3%～50.7%；与BP相比，MulCoSpecNet预测精度分别提高了2.0%～58.5%和29.6%～48.6%。基于卷积神经网络的MulCoSpecNet近红外光谱多组分预测模型有效地解决了预测精度低以及泛化能力差等问题，为建立无损高精度的近红外光谱多组分定量分析模型提供了理论基础。

关键词：近红外光谱深度学习卷积神经网络多组分定量分析

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