Optoelectronic imaging equipment is easy to expose to active laser detection devices because of ＂cat eye＂ effect. In this paper, we propose a new structure of optical system to reduce the retroreflector effect of a ...Optoelectronic imaging equipment is easy to expose to active laser detection devices because of ＂cat eye＂ effect. In this paper, we propose a new structure of optical system to reduce the retroreflector effect of a cat eye target. Decentered field lens structure is adopted in the design without sacrificing imaging quality and clear aperture. An imaging system with±30° field of view is taken for example. The detailed design and simulation results are presented. The results indicate that this kind of optical system can reduce the retroreflection signal substantially and maintain acceptable imaging performance.展开更多
[Objectives]To explore the pharmacological effects of Gardenia jasminoides and its potential benefits on eye skin.[Methods]TCMSP and SymMap databases were used to screen the active components and corresponding targets...[Objectives]To explore the pharmacological effects of Gardenia jasminoides and its potential benefits on eye skin.[Methods]TCMSP and SymMap databases were used to screen the active components and corresponding targets of G.jasminoides.Human eye skin-related targets were screened,and the active component-target network and protein-protein interaction(PPI)network were established.Gene ontology(GO)analysis and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway analysis were performed.[Results]Twenty-six active compounds were screened out from G.jasminoides,and 277 targets were obtained.From the Gencards database,26652 disease targets were retrieved and 205 related gene targets were screened.The active component-action target network of G.jasminoides constructed by Cytoscape software revealed the potential of G.jasminoides to play a role in multiple biological pathways.In addition,PPI-network analysis,GO function analysis and KEGG pathway enrichment analysis revealed that the active components of G.jasminoides mainly regulate the biological processes such as inflammatory response,oxidative stress and apoptosis,involving MAPK,NF-κB and other important signaling pathways.[Conclusions]This study provides a theoretical basis for the eye skin protection of G.jasminoides and an important clue for future drug development.展开更多
This paper addresses the urgent need to detect low,slow,and small(LSS)unmanned aerial vehicles(UAVs)in complex and critical environments,proposing an active low-altitude target detection method based on the cat’s eye...This paper addresses the urgent need to detect low,slow,and small(LSS)unmanned aerial vehicles(UAVs)in complex and critical environments,proposing an active low-altitude target detection method based on the cat’s eye effect.The detection system incorporates a control module,a laser emission component,a co-optical path panoramic scanning optical mechanism structure,an echo reception component,target detection,and visualization processing to achieve small target detection.The light source is emitted by a near-infrared laser,and the scanning optical path is realized using micro-electro-mechanical system(MEMS)mirrors and servo mechanisms.The echo reception signal is received by an avalanche photodiode(APD)and the target detection module,which captures the reflected signal and distance information.The detection software integrates the local pyramid attention(LPA)module and the field pyramid network(FPN)through the UAV micro lens identification algorithm.It eliminates false alarms by incorporating SKNet21 and uses the APD to collect echo intensity and flight time,thereby reducing the false alarm rate.The results demonstrate the feasibility of the proposed target detection method,which achieves a mean average precision of 0.809 at an intersection over union(IoU)of 0.50,a mean average precision of 0.324 at an IoU of 0.50–0.95,and a throughput of 49.8 Giga floating-point operations per second(GFLOPs),indicating that it can address the current limitations in LSS target detection.展开更多
An optical model of bright pupil effect based on Chinese human eye model is presented. The effects of the incident rays angle and the size of pupil on bright pupil effect are analyzed theoretically. For the incident r...An optical model of bright pupil effect based on Chinese human eye model is presented. The effects of the incident rays angle and the size of pupil on bright pupil effect are analyzed theoretically. For the incident rays with 5°–15° field of view, the spot diagram of emergent light is also presented. With the pupil diameters of 3–8 mm, the intensity distributions formed by emergent light are calculated. The optical model of bright pupil effect based on Chinese human eye provides a suitable model for the related further research studies and applications on bright pupil effect with Chinese eye.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.61471039)
文摘Optoelectronic imaging equipment is easy to expose to active laser detection devices because of ＂cat eye＂ effect. In this paper, we propose a new structure of optical system to reduce the retroreflector effect of a cat eye target. Decentered field lens structure is adopted in the design without sacrificing imaging quality and clear aperture. An imaging system with±30° field of view is taken for example. The detailed design and simulation results are presented. The results indicate that this kind of optical system can reduce the retroreflection signal substantially and maintain acceptable imaging performance.
文摘[Objectives]To explore the pharmacological effects of Gardenia jasminoides and its potential benefits on eye skin.[Methods]TCMSP and SymMap databases were used to screen the active components and corresponding targets of G.jasminoides.Human eye skin-related targets were screened,and the active component-target network and protein-protein interaction(PPI)network were established.Gene ontology(GO)analysis and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway analysis were performed.[Results]Twenty-six active compounds were screened out from G.jasminoides,and 277 targets were obtained.From the Gencards database,26652 disease targets were retrieved and 205 related gene targets were screened.The active component-action target network of G.jasminoides constructed by Cytoscape software revealed the potential of G.jasminoides to play a role in multiple biological pathways.In addition,PPI-network analysis,GO function analysis and KEGG pathway enrichment analysis revealed that the active components of G.jasminoides mainly regulate the biological processes such as inflammatory response,oxidative stress and apoptosis,involving MAPK,NF-κB and other important signaling pathways.[Conclusions]This study provides a theoretical basis for the eye skin protection of G.jasminoides and an important clue for future drug development.
基金Project supported by the Science and Technology Research Project of Henan Province(Nos.242102211110 and 252102211060)the Science and Technology Innovation Project of Hebei Province(No.SJMYF202312)。
文摘This paper addresses the urgent need to detect low,slow,and small(LSS)unmanned aerial vehicles(UAVs)in complex and critical environments,proposing an active low-altitude target detection method based on the cat’s eye effect.The detection system incorporates a control module,a laser emission component,a co-optical path panoramic scanning optical mechanism structure,an echo reception component,target detection,and visualization processing to achieve small target detection.The light source is emitted by a near-infrared laser,and the scanning optical path is realized using micro-electro-mechanical system(MEMS)mirrors and servo mechanisms.The echo reception signal is received by an avalanche photodiode(APD)and the target detection module,which captures the reflected signal and distance information.The detection software integrates the local pyramid attention(LPA)module and the field pyramid network(FPN)through the UAV micro lens identification algorithm.It eliminates false alarms by incorporating SKNet21 and uses the APD to collect echo intensity and flight time,thereby reducing the false alarm rate.The results demonstrate the feasibility of the proposed target detection method,which achieves a mean average precision of 0.809 at an intersection over union(IoU)of 0.50,a mean average precision of 0.324 at an IoU of 0.50–0.95,and a throughput of 49.8 Giga floating-point operations per second(GFLOPs),indicating that it can address the current limitations in LSS target detection.
基金supported in part by the National Natural Science Foundation of China(No.61302026)the Jiangsu Natural Science Foundation(Nos.BK2011752 and BK2012432)+2 种基金the Ph.D.Programs Foundation of the Ministry of Education of China(No.20123223120005)the Natural Science Foundation of the Jiangsu Higher Education Institutions(No.13KJB510025)the Science Foundation of Nanjing University of Posts and Telecommunications(Nos.NY209011 and NY211102)
文摘An optical model of bright pupil effect based on Chinese human eye model is presented. The effects of the incident rays angle and the size of pupil on bright pupil effect are analyzed theoretically. For the incident rays with 5°–15° field of view, the spot diagram of emergent light is also presented. With the pupil diameters of 3–8 mm, the intensity distributions formed by emergent light are calculated. The optical model of bright pupil effect based on Chinese human eye provides a suitable model for the related further research studies and applications on bright pupil effect with Chinese eye.
