|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | A NON-PARAMETER BAYESIAN CLASSIFIER FOR FACE RECOGNITION显示文摘A non-parameter Bayesian classifier based on Kernel Density Estimation (KDE)is presented for face recognition, which can be regarded as a weighted Nearest Neighbor (NN)classifier in formation. The class conditional density is estimated by KDE and the bandwidthof the kernel function is estimated by Expectation Maximum (EM) algorithm. Two subspaceanalysis methods-linear Principal Component Analysis (PCA) and Kernel-based PCA (KPCA)are respectively used to extract features, and the proposed method is compared with ProbabilisticReasoning Models (PRM), Nearest Center (NC) and NN classifiers which are widely used in facerecognition systems. The experiments are performed on two benchmarks and the experimentalresults show that the KDE outperforms PRM, NC and NN classifiers. | Liu Qingshan Lu Hanqing Ma Songde (Nat. Lab of Pattern Recognition, Inst. of Automation, Chinese Academy of Sciences, Beijing 100080) | 2003 | Journal of Electronics(China)2003，20，5： | 9 |
| 2 | Chloroplast genomic diversity in Bulbophyllum section Macrocaulia(Orchidaceae,Epidendroideae,Malaxideae):Insights into species divergence and adaptive evolution显示文摘Bulbophyllum is the largest genus in Orchidaceae with a pan tropical distribution.Due to highly significant diversifications,it is considered to be one of the most taxonomically and phylogenetically complex taxa.The diversification pattern and evolutionary adaptation of chloroplast genomes are poorly understood in this species-rich genus,and suitable molecular markers are necessary for species determination and phylogenetic analysis.A natural Asian section Macrocaulia was selected to estimate the interspecific divergence of chloroplast genomes in this study.Here,we sequenced the complete chloroplast genome of four Bulbophyllum species,including three species from section Macrocaulia.The four chloroplast genomes had a typical quadripartite structure with a genome size ranged from 156,182 to 158,524 bp.The chloroplast genomes included 113 unique genes encoding 79 proteins,30 tRNAs and 4 rRNAs.Comparison of the four chloroplast genomes showed that the three species from section Macrocaulia had similar structure and gene contents,and shared a number of indels,which mainly contribute to its monophyly.In addition,interspecific divergence level was also great.Several exclusive indels and polymorphism SSR loci might be used for taxonomical identification and determining interspecific polymorphisms.A total of 20 intergenic regions and three coding genes of the most variable hotspot regions were proposed as candidate effective molecular markers for future phylogenetic relationships at different taxonomical levels and species divergence in Bulbophyllum.All of chloroplast genes in four Bulbophyllum species were under purifying selection,while 13 sites within six genes exhibited sitespecific selection.A whole chloroplast genome phylogenetic analysis based on Maximum Likelihood,Bayesian and Parsimony methods all supported the monophyly of section Macrocaulia and the genus of Bulbophyllum.Our findings provide valuable molecular markers to use in accurately identifying species,clarifying taxonomy,and resolving the phylogeny and evolution of the genus Bulbophyllum.The molecular markers developed in this study will also contribute to further research of conservation of Bulbophyllum species. | Hanqing Tang Lu Tang Shicheng Shao Yulan Peng Lu Li Yan Luo | 2021 | Plant Diversity2021，43，5： | 3 |
| 3 | Structural insights into a dual-specificity histone demethylase ceKDM7A from Caenorhabditis elegans显示文摘Histone 离氨酸 methylation 能被 JmjC 包含域的蛋白质在 sequence-state-specific 和 methylation-state-specific 举止移开。然而,底层特性怎么样,决定,酶怎么被调整,大部分是未知的。我们最近发现了那 ceKDM7A,一个哲学博士 -- 并且 JmjC 包含域的蛋白质,是为 H3K9me2 特定的 histone demethylase, H3K27me2,和 PHD 摸绑定到 H3K4me3 指南在 vivo 的 demethylation 活动。为了为酶的活动和 PHD 的功能提供结构的卓见进分子的机制,摸,我们与包含 H3K4me3, H3K9me2,和 H3K27me2 修正的各种各样的联合的单身者或二肽一起在 apo 形式并且在建筑群解决了酶的六水晶结构。结构显示 H3K9me2 和 H3K27me2 以一种类似的方式与 ceKDM7A 交往,并且肽绑定特性被特定的相互作用的一个网络决定。结构的几何测量也揭示了与 PHD 手指和 H3K9me2 界限联系到 JmjC 领域的那 H3K4me3 从二个分开的分子,建议 trans-histone 肽绑定机制。因此,我们的全身的结构的研究重要地由催化领域而且更多揭示底层识别不仅,为 H3K9me2 和 H3K27me2 的 ceDKM7A 的双特性的分子的机制。 | Ying Yang Lulu Hu Ping Wang Haifeng Hou Yan Lin Yi Liu Ze Li Rui Gong Xiang Feng Lu Zhou Wen Zhang Yuhui Dong Huirong Yang Hanqing Lin Yiqin Wang Charlie Degui Chen Yanhui Xu | 2010 | Cell Research2010，20，8： | 3 |
| 4 | Double Position Servo Synchronous Drive System Based on Cross-Coupling Integrated Feedforward Control for Broacher显示文摘Synchronization errors directly deteriorate the machining accuracy of metal parts and the existed method cannot keep high synchronization precision because of external disturbances. A new double position servo synchronous driving scheme based on semi-closed-loop crosscoupling integrated feedforward control is proposed. The scheme comprises a position error cross-coupling feedforward control and a load torque identification with feedforward control. A digital integrated simulation system for the dual servo synchronous drive system is established.Using a 20 t servo broacher, performance analysis of the scheme is conducted based on this simulation system and the simulation results show that systems with traditional parallel or single control have problems when the worktable works with an unbalanced load. However, the system with proposed scheme shows good synchronous performance and positional accuracy. Broaching tests are performed and the experimental results show that the maximum dual axis synchronization error of the system is only 8 μm during acceleration and deceleration processes and the error between the actual running position and the given position is almost zero. A double position servo synchronous driving scheme is presented based on crosscoupled integrated feedforward compensation control,which can improve the synchronization precision. | Wenqi LU Kehui JI Hanqing DONG Jianya ZHANG Quanwu WANG Liang GUO | 2017 | Chinese Journal of Mechanical Engineering2017，30，2： | 2 |
| 5 | , Improving Kernel Fisher Discriminant Analysis for Face Recognition 显示文摘 | Qingshan Liu Hanqing Lu and Songde Ma | 2004 | IEEE Trans on Circuits and Sistems for Video Technlogy2004，14，1： | 1 |
| 6 | Characteristics of CeO2 Nanoparticles in W/O Microemultion显示文摘 | SHI SHOU LU RUNHUA WANG HANQING | 1999 | J Dispersion Science and Technology1999，20，4： | 1 |
| 7 | A new robust circular Gabor based object matching by using weighted Hausdorff distance显示文摘 | Zhu Zhenfeng Tang Ming Lu Hanqing | 2004 | Pattern Recognition Letters2004，25，4： | 1 |
| 8 | Determination of association constants for cyclodextrin - surfactant inclusion complexes: A numerical method based on surface tension measurements 显示文摘 | Lu R Jingcheng Hao Hanqing Wang | 1997 | J colloid Interface Sci1997，192，： | 1 |
| 9 | Characteristics of CeO2 nanoparticles in W/O microemulsion显示文摘 | Shi Shuo Lu Runhua Wang Hanqing | 1999 | Journal Dispersion Science and Technology1999，20，4： | 1 |
| 10 | Phase behaviour and microstructures of microemulsions (I)显示文摘 | Jingcheng Hao Hanqing Wang Shuo Shi Runhua Lu Taotao Wang Ganzuo Li Haiying Sun | 1997 | Science in China Series B: Chemistry1997，，3： | 1 |
| 11 | A Novel Framework for Semantic Annotation and Personalized Retrieval of Sports Video 显示文摘 | Xu Changsheng Wang Jinjun Lu Hanqing | 2008 | IEEE Transactions on Muhimediea2008，10，3： | 1 |
| 12 | Fast ObjectLevel Change Detection for VHR Images显示文摘 | Huo Chunlei Zhou Zhixin Lu Hanqing | 2010 | IEEEGeoscience and Remote Sensing Letters2010，7，1： | 1 |
| 13 | Characteristics of CeO2 Nanoparticles in w/o Microemultion 显示文摘 | Shi Shuo Lu Runhua Wang Hanqing | 1999 | J Dispersion Science and Technology1999，20，4： | 1 |
| 14 | Ensemble Learning for Independent Component Analysis显示文摘 | Cheng Jian Liu Qingshan Lu Hanqing | 2006 | Pattern Recognition2006，39，： | 1 |
| 15 | Ensemble learning for independent component analysis显示文摘 | Cheng Jian Liu Qingshan Lu Hanqing | 2006 | Pattern Recognition2006，39，： | 1 |
| 16 | Phase behaviour and microstructures of microemulsions (I)显示文摘 | Jingcheng Hao Hanqing Wang Shuo Shi Runhua Lu Taotao Wang Ganzuo Li Haiying Sun | 1997 | Science in China Series B: Chemistry1997，，3： | 1 |
| 17 | Aqueous synthesis of 79%efficient AgInGaS/ZnS quantum dots for extremely high color rendering white light-emitting diodes显示文摘Over the past few decades,I-III-VI quantum dots(QDs)have attracted considerable attention due to their large Stokes shifts,good eco-friendliness,and wide tunable emissions.In this work,a facile microwave-assisted aqueous route using glutathione(GSH)and citric acid(CA)as dual stabilizers is introduced to synthesize AgInGaS/ZnS(AIGS/ZnS)core/shell QDs.An exceptional photoluminescence quantum yield(PL QY)as high as 79%is successfully achieved,boosting the best performance of water-dispersible AIGS QDs.By varying the Ag/Ga ratio,the PL peak wavelength can be tuned from 547 to 616 nm,and luminescent hydrogel films with different colors are obtained by embedding AIGS/ZnS QDs in polyacrylamide/poly-vinyl alcohol(PAAm/PVA)hydrogels.The white light-emitting diode(WLED)with a high color rendering index(CRI)of 92.1(R_(9)=92.0)and a correlated color temperature(CCT)of 3022 K is fabricated using QDs-PAAm/PVA hydrogel films in combination with a blue InGaN LED chip,indicating that the as-prepared QDs are competitive color-conversion materials for WLEDs. | Zhe Hu Hanxu Lu Wenjie Zhou Jinxin Wei Hanqing Dai b Hong Liu Zhiyong Xiong Fengxian Xie Wanlu Zhang Ruiqian Guo | 2023 | Journal of Materials Science & Technology2023，，3： | 1 |
| 18 | Sparse semantic metric learning for image retrieval 显示文摘 | Liu Jing Li Zechao Lu Hanqing | 2014 | Multimedia Systems2014，20，6： | 1 |
| 19 | Phase behaviour and microstructures of microemulsions (I)显示文摘 | Jingcheng Hao Hanqing Wang Shuo Shi Runhua Lu Taotao Wang Ganzuo Li Haiying Sun | 1997 | Science in China Series B: Chemistry1997，，3： | 1 |
| 20 | Nonlinear matrix factorization with unified embedding for social tag relevance learning显示文摘 | Li Zechao Liu Jing Lu Hanqing | 2013 | Neurocomputing2013，105，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员