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Phase Correlation Based Iris Image Registration Model

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Journal of Computer Science & Technology 2005年第3期20卷 419-425页

作者： Jun-ZhouHuang Tie-NiuTan LiMa Yun-hongwang NationalLaboratoryofPatternRecognition InstituteofAutomationChineseAcademyofSciencesBeijing100080P.R.China NationalLaboratoryofPatternRecognition InstituteofAutomationChineseAcademyofSciencesBeijing100080P.R.China／／SchoolofComputingBeihangUniversityBeijing100083P.R.China

Iris recognition is one of the most reliable personal identification methods. In iris recognition systems, image registration is an important component. Accurately registering iris images leads to higher recognition rate for an iris recognition system. This paper proposes a phase correlation based method for iris image registration with sub-pixel accuracy. Compared with existing methods, it is insensitive to image intensity and can compensate to a certain extent the non-linear iris deformation caused by pupil movement. Experimental results show that the proposed algorithm has an encouraging performance.

关键词： phase correlation image registration iris recognition biometrics

Two New Sesquiterpenes from Euonymus nanoides

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Chinese Chemical Letters 2004年第2期15卷 197-199页

作者： ZhenLingLIU ZhongJianJIA XuanTIAN hongwang CollegeofChemistryandChemicalEngineering NationalLaboratoryofAppliedOrganicChemistryLanzhouUniversityLanzhou730000

Two new dihydroagarofuran sesquiterpenes with a novel substitution pattern: 1-(-methyl)-butanoyl-2, 15-diacetoxy-4-hydroxy-9-(-)furancarboxy--dihydroagarofuran (1) and 1, 2-di-(-methyl)-butanoyl-4-hydroxy-9-(-)furancarboxy-15-acetoxy--dihydroagaro- furan (2) were isolated from Euonymus nanoides. Their structures were elucidated by means of 1H and 13C NMR spectroscopic studies, including 2D NMR technique.

关键词： Euonymus nanoides Celastraceae sesquiterpene -dihydroagarofuran.

Pollen Morphology of Parnassia L. （Parnassiaceae） and Its Systematic Implications

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Journal of Integrative Plant Biology 2005年第1期47卷 2-12页

作者： DingWU hongwang De-ZhuLI StephenBLACKMORE LaboratoryofBiodiversityandPlantBiogeography KunmingInstituteofBotanytheChineseAcademyofSciencesKunming650204China RoyalBotanicGardenEdinburgh 20AInverleithRowEdinburghEH35LRScotlandUK

: The pollen morphology of 28 species of Parnassia L. was investigated with light microscopy and scanning electron microscopy (SEM). The shape of pollen grains in this genus varies from subspheroidal to prolate in equatorial view and is three-lobed circular in the polar view. Pollen grains are usually radially symmetrical, isopolar, tricolporate or syntricolporate, with reticulate sculpture. The pollen characteristics among species are fairly similar to each other. Morphological information regarding the pollen grains shows that Parnassia is a natural genus. Based on exine ornamentation observed under SEM, three types of pollen grains were recognized: (i) type I, with foveolate-reticulate sculpture; (ii) type II, with a finely reticulate sculpture; and (iii) type III, with a coarsely reticulate sculpture. Most sections of this genus have one type of sculpture of pollen morphology, but Sect. Nectarotrilobos has three types of sculpture and Sect. Saxifragastrum has two types of sculpture. All three types of sculpture can be found in Southwest China, with species with the longest (Parnassia delavayi Franch.) and shortest (Parnassia faberi Oliv.) colpi, implying that Southwest China is the center of diversification of the genus.

关键词： Parnassia L. pollen morphology systematic implications

Near-infrared organic photosensitizers with aggregation-induced emission and switchable fluorescence for fungal infection therapy

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Science China Chemistry 2025年

作者： Xinzhe Yang Zixuan Huang Keke Ding Huili Yang Lirong Wang Qing Xia Rong Hu guang Shi Bingjia Xu Anjun Qin School of Chemistry South China Normal University State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates Center for Aggregation-Induced Emission AIE Institute South China University of Technology Department of Urology The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College) School of Chemistry and Chemical Engineering University of South China

The development of near-infrared (NIR) photosensitizers with aggregation-induced emission (AIE) properties,switchable luminescence colors,and satisfactory photodynamic therapy (PDT) effects on the treatment of fungal infection is of great importance but very ***,two ionic organic luminogens are constructed by employing diphenylamine,diphenylacrylonitrile/1,2-diphenylethene,and methylated quinoline cation as building *** is found that the resulting compounds TCQF and TQF show apparent AIE properties and produce intense fluorescence with high photoluminescence quantum yields of up to 31.2%in the solid *** the meantime,their emission colors can be switched between red and NIR and in the NIR region by mechanical force and solvent vapor,respectively,thereby enabling remarkable and reversible mechanochromism with emission variations of up to 104 *** excitingly,TCQF and TQF can efficiently generate ROS under the illumination of white light and show excellent antimicrobial activities and satisfactory PDT *** by the unique anti-fungus properties,TCQF is employed as a biocompatible NIR photosensitizer for treating wound infection with ***,and apparent PDT effects are *** work provides a new direction for the development of multifunctional NIR materials with AIE properties.

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Advances in the Plant Isoprenoid Biosynthesis Pathway and Its Metabolic Engineering

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Journal of Integrative Plant Biology 2005年第7期47卷 769-782页

作者： YanLIU hongwang He-ChunYE Guo-FengLI KeyLaboratoryofPlantPhotosynthesisandEnvironmentalMolecularPhysiology InstituteofBotanytheChineseAcademyofSciencesBeijing100093China

Although the cytosolic isoprenoid biosynthetic pathway, mavolonate pathway, in plants has been known for many years, a new plastidial 1–deoxyxylulose-5-phosphate (DXP) pathway was identified in the past few years and its related intermediates, enzymes, and genes have been characterized quite recently. With a deep insight into the biosynthetic pathway of isoprenoids, investigations into the metabolic engineering of isoprenoid biosynthesis have started to prosper. In the present article, recent advances in the discoveries and regulatory roles of new genes and enzymes in the plastidial isoprenoid biosynthesis pathway are reviewed and examples of the metabolic engineering of cytosolic and plastidial isoprenoids biosynthesis are discussed.

关键词： biosynthesis pathway metabolic engineering plant isoprenoids

Global behavior of dynamical agents in directed network

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控制理论与应用（英文版） 2009年第3期7卷 307-314页

作者： hongwang YU Yufan ZHENG School of Mathematics and Statistic Nanjing Audit University Nanjing Jiangsu 211815 China Department of Mathematics East China Normal University Shanghai 200062 China

This paper investigates the global behavior of controlled dynamical agents in directed networks. The agents are Lyapunov stable, are distributed in a line, and communicate through a directed network. The communication topology of the network is characterized by a directed graph and the control protocol is designed in simple linear decentralized feedback law. We study the different conditions under which agents will achieve aggregation, and critical and divergent trajectories, respectively. Our investigation on the dynamical agent system under network is extended to the time-delay network case. Furthermore, we study the case with two pre-specified virtual leaders in the system. Numerical simulations are given and demonstrate that our theoretical results are effective.

关键词： Dynamical agents Directed graph Laplacian Hurwitz criteria

On the model-based networked control for singularly perturbed systems

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控制理论与应用（英文版） 2008年第2期6卷 153-162页

作者： hongwang YU Zhiming WANG Yufan ZHENG Department of Mathematics University of Shanghai Shanghai 200436 China Department of Mathematics East China No pnal University Shanghai 200062 China

In this paper, the control of a two-time-scale plant, where the sensor is connected to a linear controller/ actuator via a network is addressed. The slow and fast systems of singularly perturbed systems are used to produce an estimate of the plant state behavior between transmission times, by which one can reduce the usage of the network. The approximate solutions of the whole systems are derived and it is shown that the whole systems via the network control are generally asymptotically stable as long as their slow and fast systems are both stable. These results are also extended to the case of network delay.

关键词： Model-based networked control systems Singularly perturbed control systems Asymptotically stable Globally practical stability

TEM Specimen Preparation for Al-based Amorphous Alloys

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Journal of Materials Science & Technology 2006年第5期22卷 655-658页

作者： hongwang YANG Xinchun CHANG Wanliang HOU Jianqiang WANG Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Transmission electron microscopy （TEM） is usually used to identify the amorphicity. However, some artifacts may be introduced due to improper TEM foil preparation. In this paper, three Al-rich metallic glasses with and without a glass transition were selected for characterizing the effect of the electropolishing condition on the as-quenched structure during TEM specimen preparation. It is shown that the occurrence of the modulated bright-dark structure under TEM observation is closely sensitive to the electropolishing condition, which suggests us being careful about the possible artifacts induced by specimen preparation when examining amorphous alloys under TEM.

关键词： Al-based amorphous alloy Transmission electron microscopy Electropolishing

Peri-centrosomal localization of small interfering RNAs in C. elegans

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Science China Life Sciences 2025年

作者： Qile Jin Xuezhu Feng Minjie Hong Ke Wang Xiangyang Chen Jiewei Cheng Yan Kuang Xiaoyue Si Mingjing Xu Xinya Huang Shouhong guang Chengming Zhu Department of Obstetrics and Gynecology The First Affiliated Hospital of USTC The USTC RNA Institute Hefei National Research Center for Physical Sciences at the Microscale School of Life Sciences Division of Life Sciences and Medicine Biomedical Sciences and Health Laboratory of Anhui Province University of Science and Technology of China School of Basic Medicine Anhui Medical University

The centrosome is the microtubule-organizing center and a crucial part of cell division. Centrosomal RNAs(cnRNAs) have been reported to enable precise spatiotemporal control of gene expression during cell division in many species. Whether and how cnRNAs exist in C. elegans are unclear. Here, using the nuclear RNAi Argonaute protein NRDE-3 as a reporter, we observed potential peri-centrosome localized small interfering(si)RNAs in C. elegans. NRDE-3 was previously shown to associate with pre-mRNAs and pre-rRNAs via a process involving the presence of complementary siRNAs. We generated a GFP-NRDE-3 knock-in transgene through CRISPR/Cas9 technology and observed that NRDE-3 formed peri-centrosomal foci neighboring the tubulin protein TBB-2, other centriole proteins and pericentriolar material(PCM)components in C. elegans embryos. The peri-centrosomal accumulation of NRDE-3 depends on RNA-dependent RNA polymerase(RdRP)-synthesized 22G siRNAs and the PAZ domain of NRDE-3, which is essential for siRNA binding. Mutation of eri-1, ergo-1, or drh-3 significantly increased the percentage of pericentrosome-enriched NRDE-3. At the metaphase of the cell cycle, NRDE-3 was enriched in both the peri-centrosomal region and the spindle. Moreover, the integrity of centriole proteins and pericentriolar material(PCM) components is also required for the peri-centrosomal accumulation of NRDE-3. Therefore, we concluded that siRNAs could accumulate in the pericentrosomal region in C. elegans and suggested that the peri-centrosomal region may also be a platform for RNAi-mediated gene regulation.

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