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Journal of Materials Science & Technology 2020年第14期47卷 91-105页

作者： Cheng gu Colin d.Ridgeway Emre Cinkilic Yan Lu Alan A.Luo department of Materials Science and Engineering The Ohio State UniversityColumbusOH 43210USA department of Integrated Systems Engineering The Ohio State UniversityColumbusOH 43210USA

Porosity formation during solidification of aluminum-based alloys,due to hydrogen gas and alloy shrinkage,has been a major issue adversely affecting the performance of solidification products such as castings,welds or additively manufactured components.A three-dimensional cellular automaton(CA)model has been developed,for the first time,to couple the predictions of hydrogen-induced gas porosity and shrinkage porosity during solidification microstructure evolution of a binary Al-Si *** CA simulation results are validated under various cooling rates by porosity measurements in an experimental wedge die casting using X-ray micro computed tomography(XMCT)*** validated porosity moel provides a critical link in integrated computation materials engineering(ICME)design and manufacturing of solidification products.

关键词： Solidification Cellular automaton Microstructure simulation Microporosity evolution

墨鱼干碱水-纯水组合复水工艺优化及复水前后质构特性

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食品工业科技 2025年第1期46卷 181-189页

作者：顾俊浩尹明雨王锡昌上海海洋大学食品学院上海201306

目的:探究墨鱼干复水最优工艺参数及其复水前后的质构变化。方法:通过先用碱水后用纯水的组合复水方式进行处理,以复水率和蛋白损失率为优化指标进行条件优化,随后对墨鱼干复水前后的质构特性以及蛋白质二级结构、组织形态等相关指标进... 详细信息

目的:探究墨鱼干复水最优工艺参数及其复水前后的质构变化。方法:通过先用碱水后用纯水的组合复水方式进行处理,以复水率和蛋白损失率为优化指标进行条件优化,随后对墨鱼干复水前后的质构特性以及蛋白质二级结构、组织形态等相关指标进行分析。结果:碱水处理墨鱼干的最佳条件为:碳酸钠浓度0.50%、时间2.0 h、温度50℃、料液比1:20 g/mL;在此基础上,进行纯水处理的最佳条件为:时间1.0 h、温度50℃、料液比为1:20 g/mL。两步处理后,墨鱼干的复水率为261.10%±7.10%,蛋白损失率为16.80%±0.74%。复水处理使墨鱼干的硬度、胶着性和咀嚼性显著降低,而弹性则显著上升(P<0.05),并使肌原纤维蛋白的结构折叠,且肌纤维的间隙增加。结论:本研究明确墨鱼干最优复水参数并改善其质构特性,为墨鱼干的高质化加工利用提供理论参考。

关键词：墨鱼干复水工艺复水率蛋白损失率质构特性

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Constructing Pr-doped CoOOH catalytic sites for efficient electrooxidation of 5-hydroxymethylfurfural

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Journal of Energy Chemistry 2025年第1期 234-244页

作者： Botao Fan Hao Zhang Bang gu Feng Qiu Qiue Cao Wenhao Fang School of Chemical Science and Technology Yunnan University National Center for International Research on Photoelectric and Energy Materials School of Materials and Energy Yunnan University

Electrocatalytic conversion of renewable biomass is emerging as a promising route for sustainable chemical production;hence it urgently calls for developing efficient electrocatalysts with low potentials and high current ***,a Pr-doped Co（OH）2hexagonal sheet （Pr/Co=1/9,in mole） is synthesized by electrodeposition as highly performant catalyst for 5-hydroxymethylfurfural （HMF） oxidation reaction（HMFOR） to produce 2,5-furandicarboxylic acid （FdCA）.This novel and low-cost catalyst possesses a rather low onset potential of 1.05 V （***） and requires only 1.10 V （***） to reach a current density of 10 mA cm-2for HMFOR,significantly outperforming Co（OH）2benchmark (i.e.,210 mV higher to reach10 m A cm-2).The origin of Pr promotion effect as well as the evolution of CoOOH catalytic sites and HMFOR process has been deeply elucidated by physical characterizations,kinetic experiments,in situ electrochemical techniques,and theoretical *** unique Pr-ameliorated CoOOH active centers enable 100%conversion of HMF,99.6%selectivity of FdCA,and 99.7%Faraday efficiency,with a superior cycling durability toward *** can be one of the most outstanding results for Co-based HMFOR catalysts to date in the *** this work can help open up new horizons for constructing novel and efficient Co-based electrocatalysts by the utilization of lanthanide elements.

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Chemical structure of grain-boundary layer in SrTiO_3 and its segregation-induced transition: A continuum interface approach

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Chinese Physics B 2018年第6期27卷 3-12页

作者： Hui gu School of Materials Science ＆ Engineering Materials Genome Institute Shanghai University Shanghai 200444 China

Grain-boundary（GB） structures are commonly imaged as discrete atomic columns, yet the chemical modifications are gradual and extend into the adjacent lattices, notably the space charge, hence the two-dimensional defects may also be treated as continuum changes to extended interfacial structure. This review presents a spatially-resolved analysis by electron energy-loss spectroscopy of the GB chemical structures in a series of SrTiO3 bicrystals and a ceramic, using analytical electron microscopy of the pre-Cs-correction era. It has identified and separated a transient layer at the model Σ5 grain-boundaries（GBs） with characteristic chemical bonding, extending the continuum interfacial approach to redefine the GB chemical structure. This GB layer has evolved under segregation of iron dopant, starting from subtle changes in local bonds until a clear transition into a distinctive GB chemistry with substantially increased titanium concentration confined within the GB layer in 3-unit cells, heavily strained, and with less strontium. Similar segregated GB layer turns into a titania-based amorphous film in SrTiO3 ceramic, hence reaching a more stable chemical structure in equilibrium with the intergranular Ti2O3 glass also. Space charge was not found by acceptor doping in both the strained Σ5 and amorphous GBs in SrTiO3 owing to the native transient nature of the GB layer that facilitates the transitions induced by Fe segregation into novel chemical structures subject to local and global equilibria. These GB transitions may add a new dimension into the structure–property relationship of the electronic materials.

关键词： space charge layer strontium titanate bicrystal spatially-resolved electron energy-loss spec- troscopy interfacial transition

Chih-chen Wang: the social responsibility of scientists

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National Science Review 2021年第4期8卷 195-200页

作者： Chao gu the department of History of Science Technology and Medicine Peking University

Chih-chen Wang is a distinguished biochemist and molecular biologist, and an Academician of the Chinese Academy of Sciences (CAS).From 2008 to 2013, she was a vice chairperson of the National Committee of the Chinese People’s Political Consultative Conference(CPPCC). As a young researcher, Wang participated in research on insulin. Since the 1990s, she has been focusing on the study of protein folding, and has initiated a new research area of isomerase and molecular chaperones in China.

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Structural insights into the CRISPR-Cas-associated ribonuclease activity of Staphylococcus epidermidis Csm3 and Csm6: a step for the development of novel genome editing tool

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Science Bulletin 2018年第11期63卷 672-674页

作者： Feng gu School of Ophthalmology and Optometry Eye Hospital Wenzhou Medical University State Key Laboratory Cultivation Base and Key Laboratory of Vision Science Ministry of Health and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry

CRISPR-Cas systems has been developed as genome editing tools,which are originally discovered as sequence-specific defense system utilized by bacteria and archaea to fight with the invasion by foreign nucleic acids such as phages or *** to the current classification groups of CRISPR-Cas system,Type I,Type III and Type IV comprise the Class 1 systems for their function through multisubunit Cas protein complex to interference the targeted nucleic *** contrast,Class 2 systems,consisting of

关键词：编辑工具染色体葡萄球菌结构防卫系统噬菌体

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Materials creation adds new dimensions to 3d printing

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Science Bulletin 2016年第22期61卷 1718-1722页

作者： dongdong gu College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Institute of Additive Manufacturing (3d Printing) Nanjing University of Aeronautics and Astronautics

Additive manufacturing(AM),interchangeably termed as3d printing(3dP),has been defined as one of the key technologies in the national development strategies of a number of countries around the *** Makes,as the National Additive Manufacturing Innovation Institute,is the nation’s leading and collaborative partner in AM/3dP technology research,discovery,creation,and innovation,working efficiently to innovate and accelerate AM/3dP to increase America’s global manufacturing competitiveness(https://***).German

关键词： AM Materials creation adds new dimensions to 3d printing dMLS high SLA LMd

Feedback control for a class of second order hyperbolic distributed parameter systems

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Science China(Information Sciences) 2016年第9期59卷 156-164页

作者： Qin FU Weiguo gu Panpan gu Jianrong WU School of Mathematics and Physics Suzhou University of Science and Technology

This paper deals with the problem of state feedback control for a class of the distributed parameter systems with the disturbance term. And the considered distributed parameter systems are composed of the second order hyperbolic partial differential equations. Two different classes of restrictions on the disturbance term are given, one is that the disturbance term satisfies the linear growth constraint condition to the state variables of the system, and the other is that the disturbance term obeys the bound constraint under the significance of L2. Based on a variable structure method, the state feedback controllers are obtained by means of constructing appropriate Lyapunov functional. The closed-loop systems are globally asymptotically stable on W1,2（0, 1） × L2（0, 1） space under the effect of the state feedback control laws. Simulation results illustrate the effectiveness of the proposed method.

关键词： state feedback globally asymptotically stable second order hyperbolic distributed parameter sys tems variable structure method Lyapunov functional

development and validation of abiotic ligand model for nickel toxicity to wheat(Triticum aestivum)

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Journal of Environmental Sciences 2017年第12期29卷 22-30页

作者： Yang Jiang Xueyuan gu Bojing Zhu Cheng gu State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China.

A terrestrial biotic ligand model（t-BLM） was developed to predict nickel toxicity to wheat（Triticum aestivum） root elongation in hydroponic solutions. The competitive effects of five major cations（Ca^（2＋）, Mg^（2＋）, Na~＋, K~＋and H~＋） on Ni toxicity were investigated and Mg^（2＋）was found to be a strong competitor, while H＋showed less competing effect. Besides free Ni^（2＋）,the toxicity induced by the species NiHCO_3~＋ was non-neglect able at pH 〉 7 because NiHCO_3~＋ occupied a significant fraction of total Ni under such condition. Thus, a t-BLM including Ni^（2＋）, NiHCO_3~＋, Mg^（2＋）, and H＋could successfully predict the nickel toxicity to wheat root elongation and it performed better prediction than the conventional free ion activity *** addition, the model was examined with two sets of independent experiments, which contained multiple cations and low-molecular-weight organic acids to mimic the rhizosphere condition. The developed t-BLM well predicted nickel toxicity in both experiments since it can account in both complexation and competition effects, suggesting its potential to be used in a complicated matrix like soil solution. This study provides direct evidence that the t-BLM is a reliable method for the risk assessment of nickel in terrestrial system.

关键词： Model Nickel Wheat Toxicity Risk assessment

Robust design approach to the minimization of functional performance variations of products and systems

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Frontiers of Mechanical Engineering 2021年第2期16卷 379-392页

作者： J.ZHANG H.dU d.XUE P.gu Intelligent Manufacturing Key Laboratory of Ministry of Education Shantou UniversityShantou 515063 China department of Mechanical and Manufacturing Engineering University of CalgaryCalgary T2N1N4Canada School of Mechanical Engineering Tianjin UniversityTianjin 300072China

Functional performance variations of products and systems are often used to measure the qualities of products and systems considering the changes in the design parameter values caused by uncertainties.A robust design approach has been developed in this research to minimize the functional performance variations considering the design parameter uncertainties by identifying the boundaries of the functional performance variations through *** this work,a mathematical model is developed to describe the relationships among functional performance,design configurations and parameters,and design parameter uncertainties.A multi-level optimization model is established to identify:(1)The optimal design configuration,(2)the optimal values of design parameters,and(3)the boundaries of functional performance *** analysis considering the impact of parameter uncertainties on functional performance variation boundaries has also been conducted.A case study on the design of a truss system has been *** study results show that the sensitivities of functional performance variation boundaries to the design parameter uncertainties can be reduced significantly using the new robust design approach.

关键词： product design robust design design optimization uncertainties