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A growing social networks model of physical objects in IoT

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High Technology Letters 2018年第2期24卷 163-168页

作者： Li Ali zhai yun School of Computer and Communication Engineering University of Science and Technology Beijing Beijing 100083 P. R. China School of Information and Electrical Engineering Ludong University Yantai 264025 P. R. China E-Government Research Center Chinese Academy of Governance Beijing 100089 P. R. China

In Internet of Things （IoT） cial networks of physical objects , physical objects can build their own social networks. How do so- generate, and what characteristics do the social networks have. In order to solve these problems, according to the interaction of physical objects in IoT, this paper presents a growing social network model of physical objects and researches the attachment mecha- nism of the model that includes three modes, physical distance, social distance and preference. Through the simulation realizations of the model, the characteristics （e. g. degree distribution, com- munity structure） of social network are analyzed. The model can forecast the growth of social networks of physical object in IoT and simulate social networks of physical objects in the large scale IoT.

关键词： Internet of Things(IoT) social networks physical objects

Two integrable generalizations of WKI and FL equations: Positive and negative flows, and conservation laws

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Chinese Physics B 2020年第5期29卷 70-73页

作者： Xian-Guo Geng Fei-Ying Guo yun-yun zhai School of Mathematics and Statistics Zhengzhou UniversityZhengzhou 450001China

With the aid of Lenard recursion equations, an integrable hierarchy of nonlinear evolution equations associated with a 2 × 2 matrix spectral problem is proposed, in which the first nontrivial member in the positive flows can be reduced to a new generalization of the Wadati–Konno–Ichikawa(WKI) equation. Further, a new generalization of the Fokas–Lenells(FL) equation is derived from the negative flows. Resorting to these two Lax pairs and Riccati-type equations, the infinite conservation laws of these two corresponding equations are obtained.

关键词： integrable generalizations positive flow and negative flow infinite conservation laws

A New Algorithm for Literature Recommendation Based on a Bibliographic Heterogeneous Information Network

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Chinese Journal of Electronics 2018年第4期27卷 761-767页

作者： LI Linna WANG Lijun JIANG Xueqin HAN Hongqi zhai yun Institute of Scientific and Technical Information of China E-Government Research Center Chinese Academy of Governance

A literature recommendation algorithm based on a heterogeneous information network is proposed. The proposed algorithm can process different types of semantic information and implicit feedback. The experimental results show that the proposed algorithm can provide more effective recommendations than those algorithms without employing these semantic information and implicit feedback.

关键词： Literature recommendation algorithm Heterogeneous information network Meta-path Classification Bayesian ranking

Unsupervised, Supervised and Semi-supervised Dimensionality Reduction by Low-Rank Regression Analysis

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Chinese Journal of Electronics 2021年第4期30卷 603-610页

作者： TANG Kewei ZHANG Jun ZHANG Changsheng WANG Lijun zhai yun JIANG Wei School of Mathematics Liaoning Normal University College of Computer Science and Artificial Intelligence Wenzhou University Research Center for Information Science Theory and Methodology Institute of Scientific and Technical Information of China E-Government Research Center Chinese Academy of Governance

Techniques for dimensionality reduction have attracted much attention in computer vision and pattern recognition. However, for the supervised or unsupervised case, the methods combining regression analysis and spectral graph analysis do not consider the global structure of the subspace; For semi-supervised case,how to use the unlabeled samples more effectively is still an open problem. In this paper, we propose the methods by Low-rank regression analysis(LRRA) to deal with these problems. For supervised or unsupervised dimensionality reduction, combining spectral graph analysis and LRRA can make a global constraint on the subspace. For semi-supervised dimensionality reduction, the proposed method incorporating LRRA can exploit the unlabeled samples more effectively. The experimental results show the effectiveness of our methods.

关键词： Dimensionality reduction Low-rank Supervised Unsupervised Semi-supervised

Robust Semi-nonnegative Matrix Factorization with Adaptive Graph Regularization for Gene Representation

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Chinese Journal of Electronics 2020年第1期29卷 122-131页

作者： JIANG Wei MA Tingting FENG Xiaoting zhai yun TANG Kewei ZHANG Jie School of Mathematics Liaoning Normal University E-Government Research Center Chinese Academy of Governance

Various data representation algorithms have been proposed for gene expression. There are some shortcomings in traditional gene expression methods,such as learning the ideal affinity matrix to effectively capture the geometric structure of genetic data space,and reducing noises and outliers influences of data *** propose a novel matrix factorization algorithm called Robust semi-nonnegative matrix factorization(RSNMF)with adaptive graph regularization, which simultaneously performs matrix robust factorization with learning affinity matrix in a unified optimization framework. RSNMF also uses a loss function based on ?2,1-norm to improve the robustness of the model against noises and outliers.A novel Augmented Lagrange multiplier(ALM) is designed to obtain the optimal solution of RSNMF. The results of extensive experiments that were performed on gene expression datasets demonstrate that RSNMF outperforms the other algorithms, which validates the effectiveness and robustness of RSNMF.

关键词： Adaptive graph Matrix factorization Robustness

Synthesis and cytotoxic activity of novel 2,6-disubstituted-4-morpholinothieno[3,2-d]pyrimidines as potent anti-tumor agents

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Chinese Chemical Letters 2012年第6期23卷 703-706页

作者： Wu Fu Zhu Xin zhai Sai Li yun yun Cao Ping Gong Ya Jing Liu Key Laboratary of Original New Drugs Design and Discovery of Ministry of Education School of Pharmaceutical Engineering Shenyang Pharmaceutical University Shenyang 110016 China

A series of 2,6-disubstituted-4-morpholinothieno[3,2-d]pyrimidine derivatives were synthesized and their cytotoxic activity against H460, HT-29, MDA-MB-231, U87MG and H1975 cancer cell lines were evaluated in vitro. Most of the target compounds exhibited moderate to excellent activity to the tested cell lines. The most promising compound 23 （0.84 μmol/L, 0.23 μmol/L, 2.52 μmogL, 1.80 μmol/L） was 1.0, 2.9, 29.3 and 4.3 times more active than GDC-0941 （0.87 μ mol/L, 0.66μmol/L, 73.8 μmol/L, 7.77 μmol/L） against H460, HT-29, MDA-MB-231 and U87MG cell lines, respectively.

关键词： 4-Morpholinothieno[3,2-d]pyrimidine Synthesis Cytotoxic activity

Isolation and characterization of 49 polymorphic microsatellite loci for Decapterus maruadsi using SLAF-seq, and cross-amplifi cation to related species

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Journal of Oceanology and Limnology 2019年第1期37卷 245-255页

作者： NIU Sufang zhai yun WU Renxie ZHANG Haoran TIAN Letian DENG Jiaxin XIAO Yao College of Fisheries Guangdong Ocean University

Decapterus maruadsi is a commercially important species in China, but has been heavily exploited in some areas. There is a growing need to develop microsatellites promoting its genetic research for the adequate management of this ?shery resources. The recently developed speci?c-locus ampli?ed fragment sequencing(SLAF-seq) is an effcient and high-resolution method for genome-wide microsatellite markers discovery. In this study, 28 905 microsatellites(mono-to hexa-nucleotide repeats) were identi?ed using SLAF-seq technology, of which di-nucleotide was the most frequent(13 590, 47.02%), followed by mono-nucleotide(8 138, 28.15%), tri-nucleotide(5 727, 19.81%), tetra-nucleotide(1 104, 3.82%), pentanucleotide(234, 0.81%), and hexa-nucleotide(112, 0.39%). One hundred and thirty-two microsatellite loci(di-and tri-nucleotide) were randomly selected for ampli?cation and polymorphism, of which 49 were highly polymorphic and well-resolved. The average number of alleles per locus was 13.63, ranging from 4 to 25, and allele sizes varied between 110 bp and 309 bp. The observed heterozygosity( Ho) and expected heterozygosity( He) ranged from 0.233 to 1.000 and from 0.374 to 0.959, with mean values of 0.738 and0.836, respectively. The polymorphism information content(PIC) ranged from 0.341 to 0.941(mean=0.806).However, 12 loci deviated from Hardy-Weinberg equilibrium. Furthermore, transferability tests were also successful in validating the utility of the developed markers in ?ve phylogenetically related species of family Carangidae. A total of 48 microsatellite markers were successfully cross-ampli?ed in Decapterus macarellus, Decapterus macrosoma, Decapterus kurroides, Trachurus japonicus, and Selaroides *** present microsatellites provided the ?rst known set of microsatellite DNA markers for D. maruadsi,D. macarellus, D. kurroides, and D. macrosoma, and would be useful for further population genetic and molecular phylogeny studies as well as help with the ?sheries man

关键词： Decapterus maruadsi SLAF-seq microsatellite markers cross-amplification

Effect of pyrolysis temperature and hold time on the characteristic parameters of adsorbent derived from sewage sludge

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Journal of Environmental Sciences 2004年第4期16卷 683-686页

作者： zhai yun-bo, WEI Xian-xun, ZENG Guang-ming (Department of Environmental Science and Engineering,Hunan University, Changsha 410082, China. Department of Environmental Science and Engineering Hunan University Changsha 410082

According to the Doehlert’s matrix method, the adsorbent derived from sewage sludge was prepared through chemical activation under controlling the pyrolysis temperature and hold time. The characteristic parameters including the total yield, adsorption of methylene blue, adsorption of iodine, BET surface area, micro-pore volume are 35%—49%, 16.5—38 mg/g, 285—362 mg/g, 185—359 m2/g, and 0.112—0.224 m3/g, respectively. According to the experimental data, the multi-linear regression method was adopted to fit the relations between the characteristic parameters and influential factors. At final, through optimization method, the optimal adsorbent is obtained when using 62 min as hold time and 1105K as pyrolysis temperature. Under the conditions, the adsorbent was produced and compared the characteristic parameters with model forecast value, the coherence is satisfied.

关键词： adsorbent sewage sludge pyrolysis temperature hold time Doehlert’s matrix

Synchronization–desynchronization transitions in networks of circle maps with sinusoidal coupling

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Chinese Physics B 2023年第6期32卷 168-176页

作者：翟云肖井华郑志刚 School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China Institute of Systems Science Huaqiao UniversityXiamen 361021China College of Information Science and Engineering Huaqiao UniversityXiamen 361021China

Coupled phase oscillators are adopted as powerful platforms in studying synchrony behaviors emerged in various systems with rhythmic dynamics. Much attention has been focused on coupled time-continuous oscillators described by differential equations. In this paper, we study the synchronization dynamics of networks of coupled circle maps as the discrete version of the Kuramoto model. Despite of its simplicity in mathematical form, it is found that discreteness may induce many interesting synchronization behaviors. Multiple synchronization and desynchronization transitions of both phases and frequencies are found with varying the coupling among circle-map oscillators. The mechanisms of these transitions are interpreted in terms of the mean-field approach, where collective bifurcation cascades are revealed for coupled circle-map oscillators.

关键词： synchronization circle map Kuramoto model bifurcation