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22篇 您的检索式:作者名="Fan Kefeng"
    题名 作者 年代 出处 被引量
1Short Texts Classification Through Reference Document Expansion显示文摘With the rapid development of information technology, short texts arising from socialized human interaction are gradually predominant in network information streams. Accelerating demands are requiring the industry to provide more effective classification of the brief texts.However, faced with short text documents, each of which contains only a few words, traditional document classification models run into difficulty. Aggressive documents expansion works remarkably well for many cases but suffers from the assumption of independent, identically distributed observations. We formalize a view of classification using Bayesian decision theory, treat each short text as observations from a probabilistic model, called a statistical language model, and encode classification preferences with a loss function defined by the language models and the external reference document. According to Vapnik's methods of Structural risk minimization(SRM), the optimal classification action is the one that minimizes the structural risk, which provides a result that allows one to trade off errors on the training sample against improved generalization performance. We conduct experiments by using several corpora of microblog-like data, and analyze the experimental results. With respect to established baselines,results of these experiments show that applying our proposed document expansion method produces better chance to achieve the improved classification performance.YANG Zhen FAN Kefeng LAI Yingxu GAO Kaiming WANG Yong 2014Chinese Journal of Electronics2014,23,2:11
2Mussel-inspired nanozyme catalyzed conductive and self-setting hydrogel for adhesive and antibacterial bioelectronics显示文摘Adhesive hydrogels have broad applications ranging from tissue engineering to bioelectronics;however,fabricating adhesive hydrogels with multiple functions remains a challenge.In this study,a mussel-inspired tannic acid chelated-Ag(TA-Ag)nanozyme with peroxidase(POD)-like activity was designed by the in situ reduction of ultrasmall Ag nanoparticles(NPs)with TA.The ultrasmall TA-Ag nanozyme exhibited high catalytic activity to induce hydrogel self-setting without external aid.The nanozyme retained abundant phenolic hydroxyl groups and maintained the dynamic redox balance of phenol-quinone,providing the hydrogels with long-term and repeatable adhesiveness,similar to the adhesion of mussels.The phenolic hydroxyl groups also afforded uniform distribution of the nanozyme in the hydrogel network,thereby improving its mechanical properties and conductivity.Furthermore,the nanozyme endowed the hydrogel with antibacterial activity through synergistic effects of the reactive oxygen species generated via POD-like catalytic reactions and the intrinsic bactericidal activity of Ag.Owing to these advantages,the ultrasmall TA-Ag nanozyme-catalyzed hydrogel could be effectively used as an adhesive,antibacterial,and implantable bioelectrode to detect bio-signals,and as a wound dressing to accelerate tissue regeneration while preventing infection.Therefore,this study provides a promising approach for the fabrication of adhesive hydrogel bioelectronics with multiple functions via mussel-inspired nanozyme catalysis.Zhanrong Jia Xuanhan Lv Yue Hou Kefeng Wang Fuzeng Ren Dingguo Xu Qun Wang Kelong Fan Chaoming Xie Xiong Lu 2021Bioactive Materials2021,6,9:7
3Defense Against Objective Function Attacks in Cognitive Radio Networks显示文摘PEI Qingqi LI Hongning MA Jianfeng FAN Kefeng 2011Chinese Journal of Electronics2011,20,1:7
4CKIP-1 regulates macrophage proliferation by inhibiting TRAF6-mediated Akt activation显示文摘巨噬细胞在开发,动态平衡,织物修理和免疫起枢轴的作用。巨噬细胞增长被刺激殖民地的因素(M-CSF ) 导致了 Akt 发信号的巨噬细胞支持;然而,这个过程怎么被终止,仍然保持不清楚。这里,我们作为巨噬细胞增长的一个新奇禁止者识别酷蛋白 kinase 2-interacting protein-1 (CKIP-1 ) 。在放松巨噬细胞, CKIP-1 是在由组成地活跃的 GSK3β 的丝氨酸 342 点的 phosphorylated;, Akt 的下游的目标。这 phosphorylation 触发 CKIP-1 的 polyubiquitination 和 proteasomal 降级。在 M-CSF 刺激之上, Akt 被 CSF-1R-PI3K 激活然后使 GSK3β 失去活性;,导致 CKIP-1 和 β 的稳定; -catenin 蛋白质。β -catenin 包括 cyclin D 和 c-Myc 支持增长基因的表示。CKIP-1 与 TRAF6,为连接 K63 的 ubiquitination 要求的 ubiquitin ligase 和 Akt 的血浆膜招募交往,并且终止调停 TRAF6 的 Akt 激活。由这个工具, CKIP-1 在 M-CSF 刺激以后在迟了的阶段明确地禁止巨噬细胞增长。而且, CKIP-1 缺乏在老鼠自发地开发的 vitro 和 CKIP-1 −/− 导致增加的增长和巨噬细胞的减少的 apoptosis 巨噬细胞主导的脾大和 myeloproliferation。一起,这些数据证明 CKIP-1 由禁止调停 TRAF6 的 Akt 激活在巨噬细胞动态平衡的规定起一个关键作用。Luo Zhang Yiwu Wang Fengjun Xiao Shaoxia Wang Guichun Xing Yang Li Xiushan Yin Kefeng Lu Rongfei Wei Jiao Fan Yuhan Chen Tao Li Ping Xie Lin Yuan Lei Song Lanzhi Ma Lujing Ding Fuchu He Lingqiang Zhang 2014Cell Research2014,24,6:7
5CNN Based No-Reference HDR Image Quality Assessment显示文摘Motivated by the problems of non-universality and over-reliance on the original reference image in High dynamic range(HDR)Image quality assessment(IQA),a convolutional neural network-based algorithm for no-reference HDR image quality assessment is proposed.The Salience detection by self-resemblance(SDSR)algorithm which extracts the salient regions of the HDR image,is used to simulate the human visual attention mechanism.Then a visual quality perception network for training quality prediction models is designed according to the visual characteristics of luminance and contrast sensitivity.And this network consists of an Error estimation network(Error-net),a Perceptual resistance network(PR-net)and a mixing function.The experimental results indicate that the method proposed has high consistency with subjective perception,and the value of assessment metrics Spearman rank-order correlation coefficient(SROCC),Pearson product-moment correlation coefficient(PLCC)and Root mean square error(RMSE)correspondingly reaches 0.941,0.910 and 8.176 as well.It is comparable with classic full-reference HDR IQA methods.FAN Kefeng LIANG Jiyun LI Fei QIU Puye 2021Chinese Journal of Electronics2021,30,2:4
6Spatio-temporal variability of phytoplankton assemblages and its controlling factors in spring and summer in the Subei Shoal of Yellow Sea, China显示文摘The Subei Shoal is a special coastal area with complex physical oceanographic properties in the Yellow Sea.In the present study,the distribution of phytoplankton and its correlation with environmental factors were studied during spring and summer of 2012 in the Subei Shoal of the Yellow Sea.Phytoplankton species composition and abundance data were accomplished by Utermohl method.Diatoms represented the greatest cellular abundance during the study period.In spring,the phytoplankton cell abundance ranged from 1.59×10^3 to 269.78×10^3 cell/L with an average of 41.80×10^3 cell/L,and Skeletonema sp.and Paralia sulcata was the most dominant species.In summer,the average phytoplankton cell abundance was 72.59×10^3 cell/L with the range of 1.78×10^3 to 574.96×10^3 cell/L,and the main dominant species was Pseudo-nitzschia pungens,Skeletonema sp.,Dactyliosolen fragilissima and Chaetoceros curvisetus.The results of a redundancy analysis(RDA)showed that turbidity,temperature,salinity,pH,dissolved oxygen(DO),the ratio of dissolved inorganic nitrogen to silicate and SiO4-Si(DIN/SiO4-Si)were the most important environmental factors controlling phytoplankton assemblages in spring or summer in the Subei Shoal of the Yellow Sea.Yuanzi Huo Honghua Shi Jianheng Zhang Qiao Liu Yuanliang Duan Qing He Kefeng Yu Hongsheng Bi Chunlei Fan Peimin He 2019Acta Oceanologica Sinica2019,38,10:4
7Human Identification Technique based on Iris Feature Watermarking显示文摘FAN Kefeng MO Wei WANG Meihua ZHAO Xinhua SHEN Ji 2006Chinese Journal of Electronics2006,15,2:3
8Novel copyright protection scheme for digital content显示文摘A novel copyright protection scheme for digita l content is presented, which is a private watermarking scheme based on the waterm ark embedding in the DCT domain and watermark extraction using independent compo nent analysis (ICA). The system includes the key for watermark extraction and th e host image. The algorithm splits the original image into blocks and classifies these blocks based on visual masking, that is, noise visibility function (NVF). Watermark components with different strength are inserted into chosen direct cu rrent components of DCT coefficients according to the classifier. The watermark extraction is based on the characteristic of the statistic independence of the h ost image, watermark and key. Principle component analysis (PCA) whitening proce ss and FastICA techniques are introduced to ensure a blind watermark extraction without requiring the original image. Experimental results show the proposed tec hnique is robust under attacks such as image filtering and adding noise, croppin g and resizing. In addition, the proposed private watermarking system can be imp roved to the application of the DTV content protection system.Fan Kefeng Wang Meihua Mo Wei Zhao Xinhua 2006Journal of Systems Engineering and Electronics2006,17,2:3
9A Blockchain-Based Flexible Data Auditing Scheme for the Cloud Service显示文摘Nowdays, cloud storage technology has become a hot topic, and an increasing number of users are concerned with the security of their data in the cloud.Many auditing schemes on the cloud are proposed and the introduction of a third-party auditor to assist users in verifying the integrity of cloud data. As a centralized node, the third-party auditor has to communicate with all cloud users and cloud service providers, which becomes the bottleneck of the whole scheme. To solve this problem,we design a blockchain-based flexible cloud data auditing scheme. In our scheme, a decentralized auditing framework is proposed to eliminate the dependency on the thirdparty auditor, which increases the stability, security and performance of the whole scheme. Since the cloud service provider can automatically generates auditing proofs, our scheme can relieve the communication burdens of the cloud service provider. The proposed scheme also adapts the Merkle Hash tree to improve the verification performance.Security analysis and experiments show that the proposed scheme is secure and has better stability and verification efficiency.FAN Kefeng LI Fei YU Haiyang YANG Zhen 2021Chinese Journal of Electronics2021,30,6:3
10Text Dimensionality Reduction with Mutual Information Preserving Mapping显示文摘With the explosion of information,it is becoming increasingly difficult to get what is really wanted.Dimensionality reduction is the first step in efficient processing of large data.Although dimensionality can be reduced in many ways,little work has been done to achieve dimensionality reduction without changing the inner semantic relationship among high dimension data.To remedy this problem,we introduced a manifold learning based method,named Mutual information preserving mapping(MIPM),to explore the low-dimensional,neighborhood and mutual information preserving embeddings of highdimensional inputs.Experimental results show that the proposed method is effective for the text dimensionality reduction task.The MIPM was used to develop a temporal summarization system for efficiently monitoring the information associated with an event over time.With respect to the established baselines,results of these experiments show that our method is effective in the temporal summarization.YANG Zhen YAO Fei FAN Kefeng HUANG Jian 2017Chinese Journal of Electronics2017,26,5:2
11Research on processing medicinal herbs with multi-steps infrared macrofingerprint method 显示文摘Yu Lu Sun Suqin Fan Kefeng 2005Spectrochim Acta A2005,62,13:1
12Spectroscopic properties of Tm 3+ –Ho 3+ codoped SiO 2 –Al 2 O 3 –CaO–SrO glasses显示文摘Xin Wang Xiaokang Fan Song Gao Kefeng Li Lili Hu 2014Ceramics International2014,,:1
13Research on processingmedicinal herbs with multi-steps infraredmacro-ngerprint meth-od显示文摘Yu Lu Sun Suqin Fan Kefeng 2005Spectrochim Acta A Mol Biomol Spectrosc2005,62,13:1
14Exemplar-Based Clustering Analysis Optimized by Genetic Algorithm显示文摘YANG Zhen WANG Laitao FAN Kefeng LAI Yingxu 2013Chinese Journal of Electronics2013,22,4:1
15A Digital TV Content Protection System显示文摘WANG Meihua FAN Kefeng LI Xiaoji LI Haopeng 2008Chinese Journal of Electronics2008,17,3:0
16A Digital Interface-based Digital Rights Management Scheme for Digital Cinema显示文摘FAN Kefeng MA Zhaofeng YANG Yixiani NIU Xinxin 2010Chinese Journal of Electronics2010,19,3:0
17Corrigendum to“Bioinspired supramolecular nanofiber hydrogel through self-assembly of biphenyl-tripeptide for tissue engineering”[Bioact.Mater.8(2022)396-408]显示文摘The authors regret that the published version of the above article contained error in Fig.6F,which was not identified during the proofing stage.The wrong live/dead stain,F-actin stain,and SEM images of BPAA-GFF gel were selected during the assembly of Fig.6F.The images of Fig.6F have been replaced with the correct images as follow.The authors apologize for this error and state that the figure’s correction did not change the scientific conclusions of the article in any way.Yong Sun Xing Li Mingda Zhao Yafang Chen Yang Xu Kefeng Wang Shaoquan Bian Qing Jiang Yujiang Fan Xingdong Zhang 2023Bioactive Materials2023,,5:0
18Corrigendum to“Mussel-inspired nanozyme catalyzed conductive and self-setting hydrogel for adhesive and antibacterial bioelectronics”[Bioact.Mater.6(2021)2676-2687/452]显示文摘The authors regretZhanrong Jia Xuanhan Lv Yue Hou Kefeng Wang Fuzeng Ren Dingguo Xu Qun Wang Kelong Fan Chaoming Xie Xiong Lu 2023Bioactive Materials2023,,5:0
19Biofabrication (3D Bioprinting) Laboratory at Sichuan University显示文摘Introduction and research overview Recently,increasing need for organ transplantation and lack of donated organs have led to the rapid development of new technologies for artificial organ biofabrication.In the era of burgeoning breakthroughs around 3D bioprinting technologies,the personalization of organs and medicine is an ongoing nice vision[1–5].As one of the leading laboratories in the interdisciplinary field of materials,manufacturing and bioengineering,the Biofabrication(3D Bioprinting)Research Laboratory at Sichuan University has been engaging in the research on customized regenerativemedicine since 2012.Changchun Zhou Kefeng Wang Yong Sun Qiguang Wang Qing Jiang Jie Liang Xuan Pei Boqing Zhang Yujiang Fan Xingdong Zhang 2021Bio-Design and Manufacturing2021,4,2:0
20An Iris Biometric-Based Digital Multimedia Content Protection Scheme显示文摘FAN Kefeng WANG Meihua MO Wei WANG Zhanwu PEI Qingqi SHEN Ji 2007Chinese Journal of Electronics2007,16,2:0
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