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Precipitation Characteristics and Mechanism of Vanadium Carbides in a V-Microalloyed Medium-Carbon Steel

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Acta Metallurgica Sinica(English Letters) 2018年第11期31卷 1197-1206页

作者： xiao-lin Pan Minoru Umemoto School of Metallurgy Northeastern University Department of Mechanical Engineering Toyohashi University of Technology

The precipitation characteristics and mechanism of vanadium carbides during isothermal transformation at 650℃ in aV-microalloyed medium-carbon steel were investigated through scanning electron microscopy and transmission electronmicroscopy as well as dilatometry test. Five morphologies of vanadium carbides were found to precipitate at differentnucleation sites during the transformation. Two kinds of interphase precipitation form simultaneously in both pro-eutectoidand pearlitic ferrites. The linear arrays of fine interphase precipitates are parallel to the γ/α interface, and the fine needles ofinterphase precipitates are perpendicular to the 7/ct interface. The vanadium carbides of long or short fibers, coarse particlesand fine particles form in both pro-eutectoid and pearlitic ferrites, displaying different precipitation distributions andorientation relationships with ferrite. The precipitation mechanisms of vanadium carbide precipitates with different modeswere proposed, and the precipitation sequence of various vanadium carbide precipitates was finally ascertained.

关键词： Microalloyed steels Carbide precipitation Isothermal transformation Precipitation sequence Orientation relationship

Metal-containing covalent organic framework:a new type of photo/electrocatalyst

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Rare Metals 2022年第4期41卷 1160-1175页

作者： xiao-Tong Wang xiao-Feng lin Ding-Shan Yu Key Laboratory for Polymeric Composite and Functional Materials Ministry of EducationSun Yat-Sen UniversityGuangzhou 510275China Key Laboratory of High Performance Polymer-based Composites Guangdong ProvinceSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China

Metal-containing covalent organic frameworks(MCOFs),as a class of crystalline organic polymers with abundant single-atom metal sites,can respond effectively to various vital reactions,including hydrogen evolution reaction(HER),CO_(2) reduction reaction(CO_(2)RR),oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).The advent of MCOFs provides a platform for the establishment of model catalysts with highly repetitive structure to facilitate theoretical calculations and high-throughput screening while designing flexibility in mono-mer construction to lay the foundation for the development of highly selective and active photo/*** this review,we summarize the recent progress in this field and highlight several important MCOFs photo/electrocatalysts for OER,ORR,HER,and CO_(2)***,various approaches are also mentioned to improve or optimize the catalysts and indicate the future research direction on enhancing the performance of MCOFs catalysts based on the current existing challenges.

关键词： Covalent organic frameworks Hydrogen evolution reaction Carbon dioxide reduction reaction Oxygen reduction reaction Oxygen evolution reaction

Improved Collaborative Filtering Recommendation Based on Classification and User Trust

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Journal of Electronic Science and Technology 2016年第1期14卷 25-31页

作者： xiao-lin Xu Guang-lin Xu the College of International Vocational Education Shanghai Second Polytechnic University the College of Mathematics and Information Shanghai Lixin University of Commerce

When dealing with the ratings from users,traditional collaborative filtering algorithms do not consider the credibility of rating data,which affects the accuracy of *** address this issue,the paper proposes an improved algorithm based on classification and user *** firstly classifies all the ratings by the categories of *** then,for each category,it evaluates the trustworthy degree of each user on the category and imposes the degree on the ratings of the ***,the algorithm explores the similarities between users,finds the nearest neighbors,and makes recommendations within each *** show that the improved algorithm outperforms the traditional collaborative filtering algorithms and enhances the accuracy of recommendation.

关键词： Collaborative filtering credibility of ratings evaluation on user trust item classification similarity metric

Construction of Generalized Quantum Boolean Functions

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Chinese Journal of Electronics 2019年第3期28卷 508-513页

作者： PANG Shanqi ZHANG Qingjuan lin xiao College of Mathematics and Information Science Henan Normal University Henan Engineering Laboratory for Big Data Statistical Analysis and Optimal Control Henan Normal University

The existing construction methods of Quantum Boolean functions(QBFs) are extended and simplified. All QBFs with one qubit and all local QBFs with any qubits are constructed. And we propose the concept of Generalized quantum Boolean functions(GQBFs). We find all GQBFs with one qutrit and all kinds of local GQBFs with any qutrits. The number of each of the four kinds of functions above is uncountably infinitely many. By using diagonal matrices, we obtain uncountably infinitely many non-local QBFs with any qubits and GQBFs with any qutrits. Infinitely many families of GQBFs with any qudits are obtained from the properties of projection matrices of known saturated orthogonal arrays.

关键词： Quantum information Matrix image of orthogonal array Quantum Boolean functions Generalized quantum Boolean functions

TGF-β signaling in aortic aneurysm: another round of controversy

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Journal of Genetics and Genomics 2010年第9期37卷 583-591页

作者： Fuyu lin xiao Yang State Key Laboratory of Proteomics Genetic Laboratory of Development and Diseases Institute of Biotechnology Beijing 100071 China

Aortic aneurysm （AA） is a common health problem with high mortality and no effective drugs. Transforming growth factor-β （TGF-β） superfamily members regulate various cellular processes, and TGF-β signaling has key roles in development, tissue homeo- stasis, and diseases. Interest in the role of TGF-β signaling in the pathogenesis of AAs has recently emerged, particularly since genetic studies demonstrated an association between gene mutations in components of TGF-β signaling and AAs. However, paradoxical discoveries have implicated dysregulated TGF-β signaling in aneurysm formation, complicating the precise functional role for TGF-β in aneurysm development and progression. Furthermore, interventions targeting towards TGF-β signaling using losartan, which may represent a suitable therapeutic option for AAs, were subject to skepticism especially because of conflicting experimental results obtained from TGF-β antibody treatment without knowledge of the underlying mechanism. We propose a TGF-β aneurysm paradox, which would provide a good opportunity for the development of genetic mouse models of AA. These models would be used to clarify the mechanisms underlying TGF-β signaling, which would translate into novel pharmacologic therapies based on the new molecular discoveries.

关键词： aneurysm TGF-β signaling mouse model

Coordinated Workload Scheduling in Hierarchical Sensor Networks for Data Fusion Applications

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Journal of Computer Science & Technology 2008年第3期23卷 355-364页

作者： xiao-lin Li 曹建农 Scalable Software Systems Lab Department of Computer Science Oklahoma State University Stillwater OK 74078 U.S.A. Internet and Mobile Computing Lab Department of Computing Hong Kong Polytechnic University Hung Horn Kowloon Hong Kong China

To minimize the execution time of a sensing task over a multi-hop hierarchical sensor network, we present a coordinated scheduling method following the divisible load scheduling paradigm. The proposed scheduling strategy builds on eliminating transmission collisions and idle gaps between two successive data transmissions. We consider a sensor network consisting of several clusters. In a cluster, after related raw data measured by source nodes are collected at the fusion node, in-network data aggregation is further considered. The scheduling strategies consist of two phases： intra-cluster scheduling and inter-cluster scheduling. Intra-cluster scheduling deals with assigning different fractions of a sensing workload among source nodes in each cluster; inter-cluster scheduling involves the distribution of fused data among all fusion nodes. Closed-form solutions to the problem of task scheduling are derived. Finally, numerical examples are presented to demonstrate the impacts of different system parameters such as the number of sensor nodes, measurement, communication, and processing speed, on the finish time and energy consumption.

关键词： wireless sensor networks load scheduling divisible load theory data fusion

On the Upper Bounds of the Numbers of Perfect Matchings in Graphs with Given Parameters

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Acta Mathematicae Applicatae Sinica 2007年第1期23卷 155-160页

作者： Hong lin xiao-feng Guo School of Mathematical Sciences Xiamen University Xiamen 361005 China

Let φ（G）, κ（G）, α（G）, χ（G）, cl（G）, diam（G） denote the number of perfect matchings, connectivity, independence number, chromatic number, clique number and diameter of a graph G, respectively. In this note, by constructing some extremal graphs, the following extremal problems are solved： 1. max {φ（G）：｜V（G）｜ = 2n, κ（G）≤ k} = k[（2n - 3）!!], 2. max{φ（G）：｜V（G）｜ = 2n,α（G） ≥ k} =[∏ i=0^k-1 （2n - k-i]（2n - 2k - 1）!!], 3. max{φ（G）：｜V（G）｜=2n, χ（G） ≤ k} =φ（Tk,2n） Tk,2n is the Turán graph, that is a complete k-partitc graph on 2n vertices in which all parts are as equal in size as possible, 4. max{φ（G）：｜V（G）｜ = 2n, cl（G） = 2} = n!, 5. max{φ（G）：｜V（G）｜ = 2n, diam（G） ≥〉 2} = （2n - 2）（2n - 3）[（2n - 5）!!], max{φ（G）：｜V（G）｜ = 2n, diam（G） ≥ 3} = （n - 1）^2[（2n - 5）!!].

关键词： Perfect matching connectivity chromatic number clique number diameter

Response of Phytoneuston Community to Organic Nitrogen and Phosphorus Revealed by HPLC-Pigments Method

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Journal of Ocean University of China 2020年第4期19卷 853-864页

作者： WANG Zhaohui ZHAO Jianggang xiao lin College of Life Science and Technology Jinan UniversityGuangzhou 510632China

The sea surface microlayer(SML)is the thin boundary layer between the ocean and the *** community in the SML is known as phytoneuston and has a different community structure and biomass from the phytoplankton of the underlying bulk *** this study,water samples were collected from the SML of Daya Bay in southern China in September,October,and December of *** growth potential(AGP)tests were conducted by adding different forms of nitrogen(N),phosphorus(P)and silicate(Si).Phytoneuston grew well with both inorganic and organic nutrients,and showed comparable community structure after nutrient addition.A total of 16 pigments were analyzed in the SML samples collected from Daya Bay in this *** were dominated by the cyanobacteria-diagnostic pigment(zeaxanthin,Zea)in September and October,and by diatom-diagnostic pigment(fucoxanthin,Fuco)in *** concentrations and proportions of Fuco increased greatly after the nutrient addition,and the concentrations and proportions of Zea decreased ***,the diatom pigment index(DiatDP)increased after nutrient addition,and the prokaryotic pigment index(ProkDP)conversely *** results suggested that massive occurrences of Zea and cyanobacteria are important characteristics of phytoneuston structure in Daya Bay especially in warm seasons,and nutrient addition especially Si addition promoted the growth of diatoms.

关键词： phytoplankton sea surface microlayer pigment nutrient cyanobacteria Daya Bay

Interspecific Competition Between Levanderina fissa(Dinophyceae) and the Other Three Microalgal Species in Co-Cultures

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Journal of Ocean University of China 2019年第4期18卷 919-925页

作者： WANG Zhaohui ZHAO Jianggang xiao lin lin Langcong College of Life Science and Technology Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes Jinan University

Growth interactions between the dinoflagellate Levanderina fissa (=Gyrodinium instriatum) and the other three algal bloom species Skeletonema costatum (Bacillariophyceae), Prorocentrum micans (Dinophyceae), and Chattonella marina (Raphido- phyceae) were studied using bi- or tri-algal co-cultures under laboratory conditions. The Lotka-Volterra model was applied to esti- mate the interspecific competition between them. Results showed that the growth of L. fissa was significantly suppressed in both bi-algal and tri-algal cultures, and the maximum cell densities in co-cultures were only between 21% and 69% of that in mono-cul- ture. L. fissa outcompeted P. micans;however, its effects on S. costatum and C. marina were generally less than the effects of their intraspecific competitions based on the competition coefficients. Contrarily, the inhibitory effects of S. costatum and C. marina on L. fissa were much greater. S. costatum outcompeted the other three species in all co-cultures, and its competition coefficients on the other species were more than 10000 times higher than the opposite. The growth of C. marina was suppressed by S. costatum;how- ever, it outcompeted L. fissa and P. micans. The growth of P. micans was most strongly inhibited in co-cultures, and the maximum cell densities in co-cultures were less than 15% of that in mono-species culture. The results suggested that L. fissa had few advan- tages in the interspecific competition. The adaptation to low salinity and the utilization of organic phosphorus might be the important reasons for L. fissa to take the competitive predominance in brackish estuarine environments.

关键词： growth interaction interspecific competition Lotka-Volterra model Levanderina fissa Gyrodinium instriatum Skeletonema costatum Prorocentrum mican Chattonella marina