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Tuning the near room temperature oxidation behavior of highentropy alloy nanoparticles

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Nano Research 2022年第4期15卷 3569-3574页

作者： Jing Gao jun Ding Yin zhang Ting Zhu qian Yu Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Center for Alloy Innovation and Design State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'an 710049China Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

Understanding the oxidation behavior of high-entropy alloys(HEAs)is essential to their practical *** we conducted in situ environmental transmission electron microscopy(E-TEM)observations of dynamic oxidation processes in CrMnFeCoNi and CrFeCoNiPd nanoparticles(NPs)near room *** the oxidation of CrMnFeCoNi NPs,a favorable oxidation product was MnCr_(2)O_(4)with the spinel *** surface nanoislands of MnCr_(2)O_(4)underwent dynamic reconstruction,resulting in the thickened oxide layer with less *** CrFeCoNiPd NPs,the reactive element Mn was replaced by the inert element *** a result,a favorable oxide product was CrO_(2)with the rutile ***_(2)formed on the NP surface and was a result of Cr outward diffusion through the oxide *** addition,FeO nanocrystals formed at the oxide/metal interface and were a result of O inward diffusion through the oxide *** also performed first principles calculations to provide insights into the energetics and diffusion rates related to oxide *** results reveal the non-equilibrium processes of oxidation in HEA NPs that can be strongly influenced by small particle sizes and large surface *** work underscores the high tunability of oxidation behavior in nanoscale HEAs by changing their constituent alloying elements.

关键词： In situ transmission electron microscopy(TEM) high-entropy alloy(HEA)nanoparticles(NPs) oxidation

Unified Residue Method for Design of Compact Wide-area Damping Controller Based on Power System Stabilizer

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Journal of Modern Power Systems and Clean Energy 2020年第2期8卷 367-376页

作者： jun Qi qian Wu Youbing zhang Guoqing Weng Dan Zhou the College of Information Engineering Zhejiang University of TechnologyHangzhou 310023China

A wide-area damping controller(WADC)is effective in damping inter-area low-frequency oscillation(LFO),if the time delay in a wide-area control loop can be properly *** order to simplify the WADC design and enlarge the delay adaptation range,the classic power system stabilizer(PSS)is adopted,and a new unified residue(UR)method is proposed for compact WADC *** strategy of control loop selection is also improved by modifying the relative residue index based on a few dominant oscillation *** designed PSSbased compact WADC is as simple as classic PSS with no more than two lead-lag phase compensation *** studies are carried out on an IEEE 16-machine 68-bus power *** results demonstrate that the control loop selection before the WADC design is necessary and that the proposed selection strategy can easily pick out the suitable candidate control *** addition,it is feasible for the UR method to design WADCs with different time delays in the selected control *** the designed WADCs are effective in damping inter-area LFO and robust to time delay variations under operation *** among five design methods for PSS-based WADC show that the proposed UR method is superior in delay adaptation,the conciseness of WADC structure and computation speed of parameters.

关键词： Wide-area measurement system(WAMS) time delay wide-area damping controller(WADC) power system stabilizer(PSS)

Phase engineering activation of low-cost iron-containing sulfide minerals for advanced electrocatalysis

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Journal of Materials Science & Technology 2022年第16期111卷 181-188页

作者： jun Mei qian zhang Hong Peng Ting Liao Ziqi Sun Centre for Materials Science Queensland University of Technology2 George StreetBrisbaneQLD 4000Australia School of Chemistry and Physics Queensland University of Technology2 George StreetBrisbaneQLD 4000Australia College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China School of Chemical Engineering The University of QueenslandBrisbaneQLD 4072Australia School of Mechanical Medical and Process Engineering Queensland University of Technology2 George StreetBrisbaneQLD 4000Australia

Sustainable energy conversion and storage provide feasible approaches towards green energy solutions and carbon *** high cost and complex fabrication process of advanced energy nanomaterials,however,has impeded the practical application of emerging sustainable *** direct use of earth-abundant natural minerals which contain active elements for effective catalysis and energy storage should be a promising approach to achieve affordable sustainable energy supply and green fuel ***,as typical examples of activating natural minerals for electrocatalysis,two common minerals,pyrite and chalcopyrite,are activated via a one-step phase transformation *** a facile thermal reduction process,the minerals are completely transformed into active pyrrhotite(FeS)and haycockite(Cu_(4)Fe_(5)S_(8))*** thermal reduction resulting phase transformation can lead to significant surface disordering and can contribute to the catalytic activity by offering favourable electronic structure for intermediates adsorption,abundant surficial active centres,and substantial surface redox *** activated minerals are examined for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)*** obtained haycockite phase delivers the best performance towards acidic HER and alkaline *** phase optimization is performed via loading a low percentage of iridium nanoclusters on the haycockite phase deposited onto a carbon cloth substrate,through which an overpotential as low as 310 mV for achieving 10 mA cmand a small Tafel slope of 55.6 m V dec-1are recorded for alkaline *** work demonstrates the feasibility of the direct use of cost-effective natural resources for addressing the current energy-related issues and paves a way to reach affordable practical emerging sustainable technologies.

关键词： Minerals Phase transformation Sulfides Oxygen evolution Electrocatalysis

Evaluating and Improving Linear Regression Based Profiling:On the Selection of Its Regularization

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Journal of Computer Science & Technology 2020年第5期35卷 1175-1197页

作者： Xiang-jun Lu Chi zhang Da-Wu Gu jun-Rong Liu qian Peng Hai-Feng zhang School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China ZhiXun Crypto Testing and Evaluation Technology Co.Ltd. Shanghai 200240China Department of Microelectronics and Nanoelectronics Tsinghua UniversityBeijing 100084China Beijing Smartchip Microelectronics Technology Co. Ltd.Beijing 100082China

Side-channel attacks(SCAs)play an important role in the security evaluation of cryptographic *** a form of SCAs,profiled differential power analysis(DPA)is among the most powerful and efficient by taking advantage of a profiling phase that learns features from a controlled *** regression(LR)based profiling,a special profiling method proposed by Schindler et al.,could be extended to generic-emulating DPA(differential power analysis)by on-the-fly *** formal extension was proposed by Whitnall et *** SLR-based ***,to improve SLR-based method,Wang et *** a method based on ridge ***,the constant format of L-2 penalty still limits the performance of *** this paper,we generalize the ridge-based method and propose a new strategy of using variable *** then analyze from a theoretical point of view why we should not use constant penalty format for all *** speaking,our work reveals the underlying mechanism of how different formats affect the profiling process in the context of side ***,by selecting a proper regularization,we could push the limits of LR-based ***,we conduct simulation-based and practical experiments to confirm our ***,the results of our practical experiments show that the proper formats of regularization are different among real devices.

关键词： side-channel attack(SCA) cryptography linear regression based profiling generic-emulating differential power analysis regularization

Integrating lipidomics and gut microbiota to study the anti-hyperlipidemia effect of Sargentodoxae Caulis extract

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Traditional Medicine Research 2025年第1期10卷 1-11页

作者： Xiao-Xiao zhang Li Jia Xiu-jun Zhan Charity Ngina Qing-Rui zhang Xiao-Ge Li Qi-Bao Jiang Shi Bai Miao-Miao Jiang National Key Laboratory of Chinese Medicine Modernization Tianjin University of Traditional Chinese MedicineTianjin 301617China Haihe Laboratory of Modern Chinese Medicine Tianjin 301617China School of Medicine Taizhou UniversityTaizhou 318000China.

Background:Sargentodoxae Caulis(SC)is the vine stem of Sargentodoxa Cuneata(Oliv.)Rehd.&*** in ***,and it in traditional Chinese medicine has been known for promoting blood circulation and removing blood stasis as recorded in the ancient book“Illustrated Classics of Materia Medica”.It has been used effectively to treat blood stasis too in modern clinical ***,the anti-hyperlipidemia effect of SC is not fully *** paper aims at exploring the use of SC stems to improve the balance of blood lipids in the body,and its new role in treating ***:The effects of SC extract on hyperlipidemia were explored by combining lipidomics and gut ***,we explored the potential mechanism of SC in treating hyperlipidemia by pathway ***:The results showed that the stem extract of SC could restore the physiological and biochemical indices of hyperlipidemia in mice,as well as repair the morphological and structural damage to *** to the Model group,the SC extract significantly reduced the liver index,epididymal fat index,and Lee’s *** also significantly decreased serum levels of total cholesterol,triglycerides,low-density lipoprotein cholesterol,peroxisome proliferator-activated receptor gamma(PPAR-γ),D-lactate,and free fatty acids,while significantly increasing the relative content of peroxisome proliferator-activated receptor alpha(PPAR-α).These changes were statistically ***-targeted lipidomics,based on LC-MS,were utilized to investigate the lipid metabolism characteristics in serum,liver,and epididymal fat of the *** was observed that,compared to the blank group,the Model group exhibited significant changes primarily in glycerol lipids and *** treatment group also displayed alterations in these lipids.A total of 38,81,and 27 differential lipids were identified in serum,liver,and epididymal fat samples,*** these,14 common differenti

关键词： hyperlipidemia Sargentodoxae Caulis lipidomics intestinal flora

Word-Representation-Based Method for Extracting Organizational Events from Online Media

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Journal of Electronic Science and Technology 2017年第4期15卷 407-412页

作者： jun-qiang zhang Xiong-Wen Deng Yu qian School of Management and Economics University of Electronic Science and Technology of China Chengdu 611731 China

Online social media exhibit massive organizational event relevant messages, and the well categorized event information can be useful in many real-world applications. In this paper, we propose a research framework to extract high quality event information from massive online media data. The main contributions lie in two aspects: First, we present an event-extraction and event-categorization system for online media data; second, we present a novel approach for both discovering important event categories and classifying extracted events based on word representation and clustering model. Experimental results with real dataset show that the proposed framework is effective to extract high quality event information.

关键词： Event detection social media text mining word representation

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不同属酵母胞壁可溶性蛋白的相关性研究

山地农业生物学报 1999年第6期18卷 399-402页

作者：江萍周碧君张倩张晓明张琳贵州大学生物技术学院食品科学系贵州贵阳550025

为探讨不同属酵母胞壁可溶性蛋白组分,分别提取啤酒酵母( Saccharomyces cerevisiae) 、热带假丝酵母( Candida tropicalis) 、八胞裂殖酵母(Schizosacchromyces octosporus)细胞壁可溶性蛋白,免疫家兔制取抗体,通过血清学试验,观察3 ... 详细信息

为探讨不同属酵母胞壁可溶性蛋白组分,分别提取啤酒酵母( Saccharomyces cerevisiae) 、热带假丝酵母( Candida tropicalis) 、八胞裂殖酵母(Schizosacchromyces octosporus)细胞壁可溶性蛋白,免疫家兔制取抗体,通过血清学试验,观察3 种不同属的酵母胞壁可溶性蛋白之间的相关性,并通过聚丙烯酰胺凝胶电泳,薄层扫描观察其主要组分,结果显示出不同属的3 种酵母胞壁的可溶性蛋白种类具有很大的相似性,表现在琼脂扩散试验上出现交叉反应,电泳扫描图谱也观察到在121～125 及146-5 ～148 的位置上蛋白带重叠,热带假丝酵母及八胞裂殖酵母除含有啤酒酵母胞壁两种可溶性蛋白成分外,还分别在139 ～142 、130-5 ～133 及148-5 ～154 处显示出各自特异的蛋白区带。

关键词：酵母细胞壁可溶性蛋白血清学试验凝胶电泳

Tandem Co–O dual sites on halloysite with promoted reaction kinetics for sulfur reduction

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Journal of Energy Chemistry 2022年第12期75卷 486-493,I0013页

作者： qiang zhang Yinyin qian Ji-jun Zou Ruijie Gao Huaming Yang Engineering Research Center of Nano-Geomaterials of Ministry of Education China University of GeosciencesWuhan 430074HubeiChina Hunan Key Laboratory of Mineral Materials and Application School of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083HunanChina Faculty of Materials Science and Chemistry China University of GeosciencesWuhan 430074HubeiChina Key Laboratory for Green Chemical Technology of the Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Key Laboratory of Functional Geomaterials in China Nonmetallic Minerals Industry China University of GeosciencesWuhan 430074HubeiChina

Facilitating sulfur reduction reaction(SRR)is a promising pathway to tackle the polysulfide shuttle effect and enhance the electrochemical performance of lithium-sulfur(Li-S)*** with a solo active site can reduce a reaction barrier of a certain transition-intermediate,but the linear scaling relationship between multi-intermediates still obstructs overall ***,we construct tandem Co–O dual sites with accelerating SRR kinetics by loading highly dispersed cobalt sulfide clusters on *** catalyst features Co with upshifted d-orbital and O with downshifted p-orbital,which cooperatively adsorb long-chain polysulfide and dissociate an S–S bond,thus achieving both optimal adsorption–desorption strength and reduced conversion energy barrier of multi-intermediates in *** Li-S coin batteries using the electrocatalyst endows a high specific capacity of 1224.3 m Ah g^(-1)at 0.2 C after 200cycles,and enhances cycling stability with a low-capacity decay rate of 0.03%per cycle at 1 C after1000 ***,the strategy of the tandem Co–O dual sites is further verified in a practical Li-S pouch battery that realizes 1014.1 m Ah g^(-1)for 100 cycles,which opens up a novel avenue for designing electrocatalysts to accelerate multi-step reactions.

关键词： Sulfur reduction reaction Dual catalytic site Orbit Li-S battery

FHL2 deficiency aggravates Candida albicans infection through decreased myelopoiesis

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Science China Life Sciences 2025年

作者： Rongmei Gao Kanchao Chen Yimin Wang Rongxia Guo Xiaoyu zhang Peng Wu Weili Wang Qingxiang Huang Xuemei Xie Shangda Yang Yanling Lü qian Ren Fei Liu Song Chen Fengxia Ma Tao Cheng Hui Cheng State Key Laboratory of Experimental Hematology National Clinical Research Center for Blood Diseases Haihe Laboratory of Cell Ecosystem Institute of Hematology & Blood Diseases Hospital Chinese Academy of Medical Sciences & Peking Union Medical College CAMS Center for Stem Cell Medicine PUMC Department of Stem Cell and Regenerative Medicine

Hematopoiesis is a finely tuned process that generates all blood cell types through self-renewal and differentiation, which is crucial for maintaining homeostasis. Acute infections can prompt a hematopoietic response known as emergency myelopoiesis. In this study, using a Candida albicans (C. albicans) infection model, we demonstrated for the first time that disruption of Fhl2 led to increased fungal burden,heightened inflammatory response and reduced survival rates. Impaired myeloid hematopoiesis and immune cell production were evident, as proved by the decreased numbers of hematopoietic stem and progenitor cells (HSPCs) and granulocytes in the bone marrow of Fhl2-deficient mice. In conclusion, FHL2 regulated emergency myelopoiesis in response to C. albicans, affecting the host’s defense against pathogens.

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