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Ultrafine ordered L1_(2)-Pt-Co-Mn ternary intermetallic nanoparticles as high-performance oxygen-reduction electrocatalysts for practical fuel cells

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Journal of Energy Chemistry 2024年第6期93卷 157-165,I0005页

作者： enping wang Liuxuan Luo Yong Feng Aiming Wu Huiyuan Li Xiashuang Luo Yangge Guo Zehao Tan Fengjuan Zhu Xiaohui Yan Qi Kang Zechao Zhuang Daihui Yang Shuiyun Shen Junliang Zhang China-UK Low Carbon College Shanghai Jiao Tong UniversityShanghai 201306China Institute of Fuel Cells Key Laboratory for Power Machinery and Engineering of MOESchool of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Shanghai Tangfeng Energy Technology Co.Ltd. Shanghai 201306China State Key Laboratory of Advanced Chemical Power Sources Guizhou Meiling Power Sources Co.Ltd.Zunyi 563003GuizhouChina School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China Institute of New Energy for Vehicles School of Materials Science and EngineeringTongji UniversityShanghai 201804China Department of Chemical Engineering Columbia UniversityNY 10027USA

The long-range periodically ordered atomic structures in intermetallic nanoparticles(INPs)can significantly enhance both the electrocatalytic activity and electrochemical stability toward the oxygen reduction reaction(ORR)compared to the disordered atomic structures in ordinary solid-solution alloy ***,through a facile and scalable synthetic method,a series of carbon-supported ultrafine Pt_3Co_(x)Mn_(1-x)ternary INPs are prepared in this work,which possess the"skin-like"ultrathin Pt shells,the ordered L1_(2) atomic structure,and the high-even dispersion on supports(L1_(2)-Pt_3Co_(x)Mn_(1-x)/~SPt INPs/C).Electrochemical results present that the composition-optimized L1_(2)-Pt_3Co_(0.7)Mn_(0.3)/~SPt INPs/C exhibits the highest electrocata lytic activity among the series,which are also much better than those of the pristine ultrafine Pt/***,it also has a greatly enhanced electrochemical *** addition,the effects of annealing temperature and time are further *** importantly,such superior ORR electrocatalytic performance of L1_(2)-Pt_3Co_(0.7)Mn_(0.3)/~SPt INPs/C are also well demonstrated in practical fuel *** characterization analyses further reveal the major origins of the greatly enhanced ORR electrocata lytic performance:the Pt-Co-Mn alloy-induced geometric and ligand effects as well as the extremely high L1_(2) atomic-ordering *** work not only successfully develops a highly active and stable ordered ternary intermetallic ORR electrocatalyst,but also elucidates the corresponding"structure-function"relationship,which can be further applied in designing other intermetallic(electro)catalysts.

关键词： Platinum Cobalt Manganese Oxygen reduction reaction Ordered intermetallic L1_(2)atomic structure Proton-exchange membrane fuel cell

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先天性心脏病外科手术评估系统研究进展

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中国胸心血管外科临床杂志 2024年第4期31卷 613-620页

作者：王恩平罗书画安琪四川大学华西医院心脏大血管外科成都610041

先天性心脏病的外科手术难易程度差异较大,为确保手术安全性和最大化患者的手术获益,既往已有多种先天性心脏病手术难度评分系统,用于评估不同难易程度的外科手术风险。心脏解剖畸形的完全矫治是常见的手术难题,目前研究表明矫治效果与... 详细信息

先天性心脏病的外科手术难易程度差异较大,为确保手术安全性和最大化患者的手术获益,既往已有多种先天性心脏病手术难度评分系统,用于评估不同难易程度的外科手术风险。心脏解剖畸形的完全矫治是常见的手术难题,目前研究表明矫治效果与患者围手术期死亡率和术后并发症的发生密切相关,提出了关于心脏解剖畸形矫治程度的新型评分体系。因此,本文对已有的文献进行综述,探讨先天性心脏病外科手术的不同评估方法,从而优化先天性心脏病外科手术评估系统,提高手术质量,改善患者预后。

关键词：先天性心脏病外科手术评估系统手术技术表现残余畸形综述

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Robust stabilization of the system family

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Chinese Science Bulletin 2000年第9期45卷 802-806页

作者： wang enping HUANG Lin GENG Zhiyong Institute of System Science Chinese Academy of SciencesBeijing 100080China Department of Mechanics and Engineering Science Peking UniversityBeijing 100871China 不详

The problem of robust stabilization of a system family is studied here. A sufficient condition for the existence of a robust controller is presented under the assumption that there are perturbations both in the numerator and in the denominator of the nominal system. This condition can be given by an inequality that is satisfied by the coefficient vectors of the perturbed polynomials. Based on this, the robust controller family stabilizing the system family can be obtained. Therefore, the condition has the advantages of easy computing and further satisfying other required properties.

关键词： system family robust stabilization robust controller.

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Effect of TMGa flux on GaN films deposited on Ti coated on glass substrates at low temperature

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Chinese Science Bulletin 2013年第30期58卷 3617-3623页

作者： wang enping BIAN JiMing QIN FuWen ZHANG Dong LIU YueMei ZHAO Yue DUAN ZhongWei wang Shuai School of Physics and Optoelectronic Technology Dalian University of Technology Key Laboratory of Materials Modification by Laser Ion and Electron Beams (Ministry of Education)Dalian University of Technology Key Laboratory of Inorganic Coating Materials Chinese Academy of Sciences

Highly c-axis-oriented GaN films were deposited on Ti coated glass substrates using low temperature electron cyclotron resonance plasma enhanced metal organic chemical vapor deposition system(ECR-PEMOCVD)with trimethyl gallium(TMGa)as gallium *** influence of TMGa flux on the properties of GaN films were systematically investigated by reflection high energy electron diffraction(RHEED),X-ray diffraction analysis(XRD),atomic force microscopy(AFM)and Raman *** GaN film with small surface roughness and high c-axis preferred orientation was successfully achieved at the optimized TMGa flux of 1.0 *** ohmic contact characteristic between GaN and Ti layer was clearly demonstrated by the near-linear current-voltage(I-V)*** GaN/Ti/glass structure has great potential to dramatically improve the scalability and reduce the cost of solid-state lighting light emitting diodes.

关键词： GaN薄膜玻璃基板薄膜沉积钛涂层流量 ECR-PEMOCVD 低温化学气相沉积系统

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ROBUST STABILIZATION OF SYSTEM WITHNUMERATORAL FACTOR PERTURBATION

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Systems Science and Mathematical Sciences 1998年第2期11卷 184-192页

作者： wang enping(Institute of Systems Science, Academia Silica, Beijing 100080, China) 中科院系统科学所北京

In this paper we study the robust stabilization problems of systems withnumeratoral factor perturbations, and give a necessary and sufficiellt condition for theexistence of robust stabilization controller. The maximal permitted perturbation radius isderived of the nominal system with the form of G Lastlyl the statespace solution of the parametrized formula of the controller is obtained, through solvingthe sub-optimal Nehari’s problem.

关键词： Numeratoral factor perturbation robust stabilization robust controller.

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POLYTOPIC PERTURBATION BOUND FOR STABILITY OF POLYNOMIALS

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Systems Science and Mathematical Sciences 1995年第2期8卷 134-143页

作者： AN Senjian wang enping (Institute of Systems Science, Academia Sinica, Beijing 100080,China) 中科院系统科学所北京

ＰＯＬＹＴＯＰＩＣＰＥＲＴＵＲＢＡＴＩＯＮＢＯＵＮＤＦＯＲＳＴＡＢＩＬＩＴＹＯＦＰＯＬＹＮＯＭＩＡＬＳＡＮＳｅｎｊｉａｎ；ＷＡＮＧＥｎｐｉｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍｓＳｃｉｅｎｃｅ，ＡｃａｄｅｍｉａＳｉ... 详细信息

ＰＯＬＹＴＯＰＩＣＰＥＲＴＵＲＢＡＴＩＯＮＢＯＵＮＤＦＯＲＳＴＡＢＩＬＩＴＹＯＦＰＯＬＹＮＯＭＩＡＬＳＡＮＳｅｎｊｉａｎ；ＷＡＮＧＥｎｐｉｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍｓＳｃｉｅｎｃｅ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｂｅｉｊｉｎｇ１０００８...

关键词： Parametric uncertainty stability robustness edgewise-perturbed bound polytopic perturbation bound edge theorem

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D-SThBILITY TESTING FOR THE INTERVALMATRIX FAMILY

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Systems Science and Mathematical Sciences 1998年第3期11卷 218-226页

作者： wang enping GENG Zhiyong(Institute Of Systems Science, Academia Sinica, Beijing 100080, China)

This paper is concerned with the problem of D-stability testing for the interval matrix family. First, a nonlinearly or affine multilinearly parametrized interval polynomial family is considered. If the mapping from the parameter space to the coefficient space can be expressed as an affine linear mapping of at least two variables, then it is shown that the D-stability of the family is equivalent to that of its low dimensional boundaries. In light of this result, it is proved that to determine the D-stability of an interval matrix family,it suffices to check its n!2n(n-1) n-dimensional exposed faces. Finally the results obtained are extended to the case where the rows or the columns of the matrix family are perturbed independently in different polytopes, and a result analogous to that in the interval case is obtained.

关键词： Robust D-stability interval matrices

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带有分母因式摄动不确定系统的鲁棒镇定

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自动化学报 1999年第3期25卷 289-294页

作者：王恩平中国科学院系统科学研究所

讨论了带有分母因式不确定性摄动系统的鲁棒镇定问题，给出了控制器Ｋ鲁棒镇定摄动系统ＧΔ的充分必要条件，当标称系统Ｇ＝Ｍ－１Ｎ∈ＲＬ∞时，借助于求解次优Ｎｅｈａｒｉ问题，以状态空间形式给出了摄动系统的鲁棒控制器的参数化公式．

关键词：分母因式摄动不确定系统鲁棒镇定

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Visibility restoration for real-world hazy images via improved physical model and Gaussian total variation

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Frontiers of Computer Science 2024年第1期18卷 267-269页

作者： Chuan LI enping HU Xinyu ZHANG Hao ZHOU Hailing XIONG Yun LIU College of Computer and Information Science Southwest UniversityChongqing 400715China School of Big Data and Intelligent Engineering Chongqing College of International Business and EconomicsChongqing 401520China College of Artificial Intelligence Southwest UniversityChongqing 400715China College of Electronic and Information Engineering Southwest UniversityChongqing 400715China

1 Introduction Under real-world haze conditions,the existence of haze particles in the atmosphere reduces the visibility of captured ***,the noise is inevitably introduced into the degraded image,which further deteriorates the visual quality of the *** enhance the visibility and quality of outdoor real-world hazy images,numerous algorithms have been proposed to remove haze from a single input *** existing methods are broadly lumped into two categories:prior-based methods[1,2]and learning-based methods[3–6].Unfortunately,the widely used atmospheric scattering model and the corresponding haze removal methods fail to take the noise interference into account,which may result in poor visibility restoration performance.

关键词： visibility remove noise

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Single‑cell sequencing reveals the reproductive variations between primiparous and multiparous Hu ewes

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Journal of Animal Science and Biotechnology 2024年第2期15卷 614-631页

作者： Ting Ge Yifan Wen Bo Li Xiaoyu Huang Shaohua Jiang enping Zhang Key Laboratory of Animal Genetics Breeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYangling 712100China

Background In the modern sheep production systems,the reproductive performance of ewes determines the economic profitability of *** the genetic mechanisms underlying differences in the litter size is important for the selection and breeding of highly prolific *** sheep,a high-quality Chinese sheep breed,is known for its high fecundity and is often used as a model to study prolificacy *** the current study,animals were divided into two groups according to their delivery rates in three consecutive lambing seasons(namely,the high and low reproductive groups with≥3 lambs and one lamb per season,n=3,respectively).The ewes were slaughtered within 12 h of estrus,and unilateral ovarian tissues were collected and analyzed by 10×Genomics single-cell RNA *** A total of 5 types of somatic cells were identified and corresponding expression profiles were mapped in the ovaries of each ***,the differences in the ovary somatic cell expression profiles between the high and low reproductive groups were mainly clustered in the granulosa ***,four granulosa cell subtypes were *** analysis revealed that the abundance of JPH1 expression and the reduction of LOC101112291 expression could lead to different evolutionary directions of the granulosa ***,the expression levels of FTH1 and FTL in mural granulosa cells of the highly reproductive group were significantly *** genes inhibit necroptosis and ferroptosis of mural granulosa cells,which helps prevent follicular *** This study provides insights into the molecular mechanisms underlying the high fecundity of Hu *** differences in gene expression profiles,particularly in the granulosa cells,suggest that these cells play a critical role in female *** findings also highlight the importance of genes such as JPH1,LOC101112291,FTH1,and FTL in regulating granulosa cell function and follicular development.

关键词： Granulosa cells Hu sheep Lambing number Ovarian somatic cells Single-cell RNA sequencing

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