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Oxygen and Nitrogen Effects on MC Carbide in K465 Nickel-Base Superalloy

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稀有金属材料与工程 2009年第A03期38卷 13-16页

作者： Wang L N zheng q Sun X F Guan H R hu z q Institute of Metals Research Chinese Academy of Sciences Shenyang 110015 China

Effects of oxygen and nitrogen on MC carbide in nickel-base superalloy K465 were investigated, because neither of the two gas elements was found to decide MC carbide morphology monotonically. The morphology of MC carbide under alloy solidified in conventional investment casting condition was observed to transform from script-type to block-type with the total oxygen and nitrogen content (gas content) in samples rising up from 1.2×10-6 mol/g to 2.6×10-6 mol/g. The area fraction and composition of the MC carbide also varied with increase of gas content. However, the morphology of MC carbide kept to be script-type even when gas content was up to 3.4×10-6 mol/g in samples solidified with a much higher cooling rate. These results indicate that effects of gas content on formation of MC carbide can be observed in specimens solidified with low cooling rate, but such changes in MC carbide cannot be found when the cooling rate is high.

关键词：氧碳化物氮含量物理性能碳化物

MICROSTRVCTURE SIMULATION AND PROCESS OPTIMIzATION OF TURBINE BLADE CASTINGS

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Acta Metallurgica Sinica(English Letters) 1998年第5期11卷 383-390页

作者： D.z.Li z.Y.hu q.Li Y.Y.Li Inst of Metal Research The Chinese Acad of Sciences Shenyang China

The probabilistic modeling is applied to calculate microstructural features of the thin complex smprolloy turbine blades cast by the vacuum investment process. The random distribution, orientation and physical mechanism of the nucleation, the growth kinetics of dendrites and the columnar-to-equiaxed transition (CET) are *** on these simulating schemes, the comprehensive influence of key process variables on the scale and uniformity of grains has been involved quantitatively. The validity of the modeling is confirmed by selection of the optimum process variables.

关键词： Probabilistic modeling microstructure process optimization

智能时代的红树林知识服务展望:从植物图谱到知识图谱

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中国科学:地球科学 2025年第1期55卷 111-125页

作者：侯志伟荆文龙秦承志杨骥夏清尹小玲广东省科学院广州地理研究所广东省遥感与地理信息系统应用重点实验室广东省地理时空大数据工程实验室广州510070 南方海洋科学与工程广东省实验室(广州) 广州511458 中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室北京100101 中国科学院大学资源与环境学院北京100049 长沙理工大学交通运输工程学院长沙410114

红树林关乎地球生态安全和人类福祉,其管理、保护与修复离不开生物、生态等多学科领域知识与时空信息的支撑.植物图谱等传统知识服务可以提供图文并茂的红树林知识.然而,这种面向信息检索的服务方式,无法有效挖掘和利用多源异构数据中... 详细信息

红树林关乎地球生态安全和人类福祉,其管理、保护与修复离不开生物、生态等多学科领域知识与时空信息的支撑.植物图谱等传统知识服务可以提供图文并茂的红树林知识.然而,这种面向信息检索的服务方式,无法有效挖掘和利用多源异构数据中的碎片化知识,面临“数据海量、知识难求”困境.知识图谱可将海量数据中蕴含的知识,提取、组织、融合为计算机可理解、可计算的语义网络,为实现智能知识服务提供了解决方案.本文聚焦红树林知识获取、形式化表达及智能服务的迫切需求,提出了红树林知识图谱和知识服务构想.首先分析了不同领域图谱概念的异同,认为红树林知识图谱是以红树林生态系统为核心,融合了多领域知识和时空信息的大规模知识库;然后提出了红树林知识服务的研究框架,该框架可实现多模态数据到智能知识服务的转变,包括泛在数据感知与汇聚、知识组织与图谱构建、智能知识服务等多个层次;接着重点介绍了红树林知识图谱的构建方法与流程;最后探讨了目前红树林知识服务面临的挑战,提出在人工智能时代,构建融合领域特色与时空特征的红树林知识体系,探索大模型支持下的知识抽取与融合方法,并研发面向典型场景的智能知识应用,是红树林知识服务的主要发展方向.

关键词：红树林图谱知识图谱多模态知识服务

STUDY ON THE SHOCK WAVE CRYSTALLIzATION OF AMORPHOUS ALLOYS BY DSC

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Acta Metallurgica Sinica(English Letters) 2002年第5期15卷 431-438页

作者： H. Y. zhao, H. Wang, q.J. Liu, J.D. Kan and z.q. LiuDepartment of Materials Science and Engineering, Yunnan University, Kunming 650091, China Department of Materials Science and Engineering Yunnan University

Shock wave and annealing crystallization of amorphous alloys FeSiB, FeMoSiB and FeCuNbSiB were studied by isothermal and non-isothermal DSC technique. It was found that the shock wave crystallization is very perfect, the fraction crystallized is very close to 100%, though the period of crystallization is very short, only about 10-4-10-6s. Their produced phases differ from the parent phase in structure and composition. The high velocity of the transformation is very difficult to explain by the diffusion theory of solid state phase transition.

关键词： amorphous alloy nano-crystallization shock wave crystalliza-tion

Lattice-mismatch-induced formation of defect-rich Pd-Cu alloy nanocages for enhanced formic acid oxidation activity

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Science China Chemistry 2025年第2期68卷 481-491页

作者： zhaojun Liu zhengyan Wang zhaoyu Wang Hao Yuan Yuke Bai Xiaoxiao Wang zerui Mu Chunxia Wu Kai Liu zhun hu Chuanbo Gao Sate Key Laboratory of Multiphase Flow in Power Engineering Frontier Institute of Science and TechnologyXi’an Jiaotong UniversityXi’an 710049China Institute of Industrial Catalysis School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an 710049China

Crystallographic defects in noble metal nanocrystals are recognized as highly active catalytic sites,significantly enhancing activities in many important *** their importance,synthesizing noble metal nanocrystals with a high density of defects poses a considerable synthetic ***,we present a novel lattice mismatch-induced formation mechanism to create high-density defects in noble metal *** approach takes advantage of lattice mismatch to enable nonepitaxial nucleation and growth of a noble metal on a foreign metal substrate,forming abundant noble metal crystallites with random lattice orientations not dictated by the substrate *** these crystallites grow extensively,they merge,forming numerous grain boundaries and yielding defect-rich noble metal ***-rich alloy nanocrystals can also be synthesized through a subsequent vacancy-diffusion alloying *** take defective PdCu alloy nanocages as an example and demonstrate the effectiveness of crystallographic defects in enhancing catalytic performance of noble metal *** nanocages exhibit superior activity in the electrocatalytic formic acid oxidation reaction,which is 1.6 times greater than their defect-free *** strategy offers a new avenue for creating defect-rich noble metal nanocrystals as highly efficient catalysts for a wide array of catalytic applications.

关键词： noble metal nanocrystals defects non-epitaxial growth electrocatalysis formic acid oxidation reaction

Rational design of AgGaS/znS/znS quantum dots with a near-unity photoluminescence quantum yield via double shelling scheme

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Journal of Materials Science & Technology 2024年第2期169卷 235-242页

作者： H.X.Lu H.Liu z.z.Fu Y.Y.Chen H.q.Dai z.hu W.L.zhang R.q.Guo Institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China Institute of Future Lighting Academy for Engineering and TechnologyFudan UniversityShanghai 200433China Yiwu Research Institute of Fudan University YiwuZhejiang 322000China zhongshan-Fudan Joint Innovation Center Zhongshan 528437China

In this study,a two-step method was used to synthesize highly luminescent AgGaS/znS/znS quantum dots(qDs).In the first step,an inner znS shell was formed via a one-pot method,which resulted in a smaller lattice mismatch between the AgGaS core and the outer znS shell,thereby facilitating the formation of a thick outer *** the two-step shelling process,the synthesized AgGaS/znS/znS qDs showed an excellent photoluminescence quantum yield(PLqY)of 96.4%with a peak wavelength of 508 nm,repre-senting the highest PLqY reported thus far for AgGaS ***,the effect of halogen ions in zn precursors on the shelling process was *** was proposed that the capacity of halogen ions to coordinate with the qDs influenced the balance between zn cation diffusion and znS shelling ***,the znS shelling reaction was dominant when znCl_(2)was employed,while zn cation diffusion was the dominant process under the I^(−)-rich *** work provides insights into the interfacial restructuring during the znS shelling and offers a clear map for the tailored synthesis of core/shell qDs.

关键词： AgGaS quantum dots Photoluminescence Core/shell Alloyed core/shell interface

MODELING OF DYNAMIC RECRYSTALLIzATION OF Ti6A14V ALLOY USING A CELLULAR AUTOMATON APPROACH

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Acta Metallurgica Sinica(English Letters) 2008年第4期21卷 260-268页

作者： J.W. zhao H. Ding W.J. zhao F.R. Cao H.L. Hou z.q. Li School of Materials and Metallurgy Northeastern University Shenyang 110004 China Beijing Aeronautical Manufacturing Technology Research Institute Beijing 100024 China

A cellular automaton （CA） model is established to simulate dynamic recrystallization （DRX） in the β single-phase field of Ti6Al4 V alloy, and the kinetics during DRX processing has been analyzed. The model employed considers the influences of dynamic recovery, nucleation rate, strain rate and dislocation density on DRX, and practical deformation parameters, such as temperature, strain and strain rate on DRX have been considered in the simulation. The simulated DRX grain size and DRX grain shape agree well with the experimental results, which shows the availability and lea- sibility of the cellular automaton method for the simulation of DRX. The result of kinetics analysis of DRX reveals that the Avrami exponent is variable ranging from 2.4 to 2.9, which increases with the increase of strain rate.

关键词： Ti6A4 V alloyi Dynamic recrystallization Kinetics Modeling Cellular automaton

MICROSTRUCTURE AND MECHANICAL PROPERTIES OF Mg-Li ALLOY WITH Ca ADDITION

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Acta Metallurgica Sinica(English Letters) 2006年第5期19卷 355-361页

作者： H.B. Li G. C. Yao z.q. Guo Y.H. Liu H.J. Yu H.B. Ji School of Materials ＆ Metallurgy Northeastern University Shenyang 110004 China

Mg-9wt%Li-2wt%zn alloy was prepared and studied in this article. The addition of Ca to the alloy from 0.1wt% to 1wt% can refine the α-Mg and the best effect of refinement occurs when Ca content is 0.4wt%-0.5wt%. The billets can be rolled to thin sheets at room temperature, from which it is obvious that the addition of Ca improves alloys ormalin. while it decreases with the excess addition of Ca. The results also show that the ultimate tensile strength （UTS） and yield strength （YS） of the alloy with lwt% Ca may rise by 28% and 25%, respectively, however, the elongation decreases. It is clarified that the adsorption of proper Ca on the grain boundaries refines α-Mg and improves the tensile properties, but the presence of excess Ca and stable Ca2Mg6zn3phase worsens the elongation.

关键词： calcium Mg-Li-zn alloy cold rolling microstructure tensile property

Advancements in proteogenomics for preclinical targeted cancer therapy research

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生物物理学报（英文） 2025年第1期11卷 56-76页

作者： Yuying Suo Yuanli Song Yuqiu Wang qian Liu Henry Rodriguez hu zhou Department of Analytical Chemistry State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai 201203 China University of Chinese Academy of Sciences Beijing 100049 China Department of Otolaryngology Eye & ENT Hospital Fudan University Shanghai 200031 China Office of Cancer Clinical Proteomics Research National Cancer Institute National Institutes of Health Rockville MD 20850 USA

Advancements in molecular characterization technologies have accelerated targeted cancer therapy research at unprecedented resolution and dimensionality. Integrating comprehensive multi-omic molecular profiling of a tumor, proteogenomics, marks a transformative milestone for preclinical cancer research. In this paper, we initially provided an overview of proteogenomics in cancer research, spanning genomics, transcriptomics, and proteomics. Subsequently, the applications were introduced and examined from different perspectives, including but not limited to genetic alterations, molecular quantifications, single-cell patterns, different post-translational modification levels, subtype signatures, and immune landscape. We also paid attention to the combined multi-omics data analysis and pan-cancer analysis. This paper highlights the crucial role of proteogenomics in preclinical targeted cancer therapy research, including but not limited to elucidating the mechanisms of tumorigenesis, discovering effective therapeutic targets and promising biomarkers, and developing subtype-specific therapies.

关键词： Proteogenomics Targeted cancer therapy Integrated omics analysis