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Spectral sensitivity of the compound eyes of Anomala corpulenta motschulsky(Coleoptera:Scarabaeoidea)

Journal of Integrative Agriculture 2015年第4期14卷 706-713页

作者： Jiang yue-li Guo yu-yuan Wu yu-qing Li Tong duan yun Miao Jin Gong Zhong-jun Huang Zhi-juan College of Plant Protection Northwest A&F University Key Laboratory of Crop Pest Control of Henan Province/Institute of Plant Protection Henan Academy of Agricultural Sciences State Key Laboratory for the Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural Sciences

The scarab beetle, Anomala corpulenta Motschulsky（Coleoptera： Scarabaeoidea）, is a widespread and destructive pest in China. Vision is one of the most important means of acquiring information about the external environment. In order to contribute to the understanding of the perception of visual stimuli in this species, the light sensitivity and spectral responses of the scarab beetle, A. corpulenta, were measured by using an electroretinogram（ERG） technique. In total, 14 monochromatic light intensities, between 340 and 605 nm, were applied to the compound eyes of A. corpulenta under varying levels of adaptation to dark and light conditions. The results showed that all light stimuli induced an ERG response, with varied amplitudes. The spectral sensitivity curve of dark-adapted eyes showed one major peak（~400 nm; near-ultraviolet）, a secondary peak（from 498 to 562 nm; yellow-green） and the third peakat 460 nm. By contrast, in light-adapted eyes, only a near-UV peak was observed. From these results, we conclude that the compound eye of A. corpulenta is likely to have at least three spectral types of photoreceptor. Significance of differences were also recorded in the responses of male and female compound eyes, as well as diurnally and nocturnally. The amplitude of ERG in response to white-light stimuli varied with the light intensity： The stronger the luminance, the higher the ERG value. This suggests that the compound eye of A. corpulenta adapts quickly to changing light conditions, enabling A. corpulenta to maintain nocturnal activities.

关键词： Anomala corpulenta electroretinogram insect vision spectral sensitivity light intensity

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Trophallaxis network control approach to formation flight of multiple unmanned aerial vehicles

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Science China(Technological Sciences) 2013年第5期56卷 1066-1074页

作者： duan HaiBin LUO QiNan yu YaXiang Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical EngineeringBeihang University

A novel network control method based on trophaUaxis mechanism is applied to the formation flight problem for multiple un- manned aerial vehicles （UAVs）. Firstly, the multiple UAVs formation flight system based on trophallaxis network control is given. Then, the model of leader-follower formation flight with a virtual leader based on trophallaxis network control is pre- sented, and the influence of time delays on the network performance is analyzed. A particle swarm optimization （PSO）-based formation controller is proposed for solving the leader-follower formation flight system. The proposed method is applied to five UAVs for achieving a ＇V＇ formation, and a series of experimental results show its feasibility and validity. The proposed control algorithm is also a promising control strategy for formation flight of multiple unmanned underwater vehicles （UUVs）, unmanned ground vehicles （UGVs）, missiles and satellites.

关键词： unmanned aerial vehicle (UAV) trophaHaxis network control formation flight particle swarm optimization (PSO)

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An ocean-land-atmosphere coupled model for tropical cyclone landfall processes: The multi-layer ocean model and its verification

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Acta Oceanologica Sinica 2006年第2期25卷 33-48页

作者： duan Yihong yu Runling LI Yongping Shanghai Typhoon Institute of China Meteorological Administration Shanghai 200030China

POM (Princeton ocean model) tentatively taken as the ocean part of an ocean-land atmosphere coupled modcl is verified for the ultimate purpose of studying the landfall process of tropical cyclone (TC) in the western North Pacific. The POM is tested with monthly mean wind stress in the summer and given lateral boundary conditions. The results indicate that the equilibrium state of the ocean is in accordance with the climate mean, with the error in sea surface temperature (salinity) less than 0.5 ℃ (0.5). The simulated occan currents are reasonable as *** numerical experiments are designed to verify the oceanic response to a stationary or moving TC. It is found that the results agree fairly well with the previous work, including both the drop magnitude and the distribution ofsca temperature. Compared with the simple two-layer ocean model used by some other studies, the response of the ocean to a TC is more logical here. The model is also verified in a real case with a TC passing the neighborhood of a buoy station. It is shown that the established ocean model can basically reproduce the sea surface temperature change as observed.

关键词： tropical cyclone ocean coupled model

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A social interaction system based on cloud computing for mobile video telephony

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Science China(Information Sciences) 2014年第3期57卷 19-28页

作者： yu yuan-Chih Department of Information Management Chinese Culture University

As the use of smartphones become popular,people heavily depend on smartphone applications to deal with their social *** this reason,traditional message texting between mobile applications does not fulfill the versatile requirements of social *** mobile applications use multimodality to deliver multimedia messages including sticker,voice and photo message,video call,and snap movie to enhance the communicative ***,without face-to-face interaction,people may fail to detect the other side’s non-verbal social behavior such as fine-grain facial expressions,body movements,or hand *** social interaction,non-verbal behavior conveys information about the involved individuals and help the speakers express their social emotion in an implicit *** is so important for real-world face-to-face interaction but is often blocked on the mobile *** cope with this problem,we propose an afective computing model to assist the representation of social emotion and then help the progress of social interaction on the mobile *** this model,for the purpose of real-time afective analysis,we delegate the computing loading to the cloud side service and enhance the system’s scalability and *** result of this experiment approves the feasibility of our system design for the applications of social ***,the system provides a research framework of the social intelligent system on the mobile telephony.

关键词： social interaction social emotion mobile telephony sensor fusion social signal processing

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Interannual Variability of Late-spring Circulation and Diabatic Heating over the Tibetan Plateau Associated with Indian Ocean Forcing

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Advances in Atmospheric Sciences 2018年第8期35卷 31-45页

作者： yu ZHAO Anmin duan Guoxiong WU State Key Laboratory of Numerical Modelling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China University of Chinese Academy of Sciences Beijing 100049 China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and Technology Nanjing 210044 China

The thermal forcing of the Tibetan Plateau （TP） during boreal spring, which involves surface sensible heating, latent heating released by convection and radiation flux heat, is critical for the seasonal and subseasonal variation of the East Asian summer monsoon. Distinct from the situation in March and April when the TP thermal forcing is modulated by the sea surface temperature anomaly （SSTA） in the North Atlantic, the present study shows that it is altered mainly by the SSTA in the Indian Ocean Basin Mode （IOBM） in May, according to in-situ observations over the TP and MERRA reanalysis data. In the positive phase of the IOBM, a local Hadley circulation is enhanced, with its ascending branch over the southwestern Indian Ocean and a descending one over the southeastern TP, leading to suppressed precipitation and weaker latent heat over the eastern TP. Meanwhile, stronger westerly flow and surface sensible heating emerges over much of the TP, along with slight variations in local net radiation flux due to cancellation between its components. The opposite trends occur in the negative phase of the IOBM. Moreover, the main associated physical processes can be validated by a series of sensitivity experiments based on an atmospheric general circulation model, FAMIL. Therefore, rather than influenced by the remote SSTAs of the northern Atlantic in the early spring, the thermal forcing of the TP is altered by the Indian Ocean SSTA in the late spring on an interannual timescale.

关键词： Indian Ocean Tibetan Plateau circulation diabatic heating

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The synthesis and study of the fluorescent probe for sensing Cu^(2+) based on a novel coumarin Schiff-base

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Chinese Chemical Letters 2014年第7期25卷 1082-1086页

作者： yu-Wei duan Hao-Yang Tang yuan Guo Zhan-Ke Song Meng-Jiao Peng Yong Yan Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials ScienceNorthwest University School of Automation Xi’an University of Posts and Telecommunications

A novel, fluorescent probe was synthesized from 2,4-dihydroxybenzaldehyde and 8-hydroxyquinoline for sensing Cu2＋ by the naked eye. The structure was confirmed by 1R, MS, 1H NMR, 13C NMR and the spectral properties of the probe were investigated. It exhibited strong fluorescence responses toward Cu2＋ and high selectivity over other metal ions. The binding constant between the probe and Cu2＋ was calculated using Benesi-Hildebrand equation.

关键词： Fluorescent probe Schiff-base Copperion Coumarin

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Flavanone and flavonoid hydroxylase genes regulate fiber color formation in naturally colored cotton

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The Crop Journal 2023年第3期11卷 766-773页

作者： Hongli Zheng Bailin duan Bo yuan Zhengbin Chen Dongliang yu Liping Ke Wenlong Zhou Haifeng Liu yuqiang Sun Plant Genomics and Molecular Improvement of Colored Fiber Laboratory College of Life Sciences and MedicineZhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina College of Textile Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina China Colored-cotton(Group)Co. Ltd.Urumqi 830011XinjiangChina

Using naturally colored cotton(NCC)can eliminate dyeing,printing and industrial processing,and reduce sewage discharge and energy ***(PAs),the primary coloration components in brown fibers,are polyphenols formed by oligomers or polymers of flavan-3-ol units derived from *** essential structural genes for flavanone and flavonoid hydroxylation encoding flavanone-3-hydroxylase(F3H),flavonoid 3’-hydroxylase(F3’H)and flavonoid 3’5’-hydroxylase(F3’5’H)are initially committed in the flavonoid biosynthesis pathway to produce common *** three genes were all expressed predominantly in developing fibers of NCCs,and their expression patterns varied temporally and spatially among NCC *** GhF3Hi,GhF3’Hi and GhF3’5’Hi silenced lines of NCC varieties XC20 and ZX1,the expression level of the three genes decreased in developing cotton fiber,negatively correlated with anthocyanidin content and fiber color *** color depth and type in RNAi lines changed with endogenous gene silencing efficiency and expression pattern,the three hydroxylase genes functioned in fiber color ***3H showed functional differentiation among NCC varieties and GhF3’H acted in the accumulation of anthocyanin in *** with GhF3’H,GhF3’5’H was expressed more highly in brown fiber with a longer duration of expression and caused lighter color of fibers in GhF3’5’H silenced *** three genes regulating fiber color depth and type could be used to improve these traits by genetic manipulation.

关键词： Naturally colored cotton Brown cotton fiber Fiber color Anthocyanidin Flavanone/flavanoid hydroxylase

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A Note on the Mean Value of Numbers of the Solutions of x~α=1(mod n)

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Acta Mathematica Sinica,English Series 2004年第6期20卷 1095-1102页

作者： Xiu yuan yu Department of Mathematics Hangzhou Teachers' College Department of Mathematics Quzhou College

Let T=T(p,q,α) be the number of solutions of the congruence x~α≡1 (rood p^nq~θ).Let A and B be sets of primes satisfying x_1 详细信息

Let T=T(p,q,α) be the number of solutions of the congruence x~α≡1 (rood p^nq~θ).Let A and B be sets of primes satisfying x_1

关键词： Congruence Number of solutions Mean value

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The Silk Textile Embedded in Silk Fibroin Composite: Preparation and Properties

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Chinese Journal of Polymer Science 2018年第9期36卷 1043-1046页

作者： yu duan Xin Chen Zheng-Zhong Shao State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Laboratory of Advanced Materials Fudan University

Silk reinforced silk-fibroin-based composites were prepared by embedding of silk textile into regenerated silk fibroin （RSF） matrix. The breaking stress and breaking strain of the composites were found 37.7 MPa and 71.1% respectively at （95 ：t： 5）% RH. Morphological analysis was carried out to observe fracture behavior of the samples. The in vitro biodegradation test showed that the composite degraded slowly and lost 70% weight at the end of 168 h. Moreover, compared with RSF pure film, the composite kept strength and toughness much longer time. In conclusion, this composite has the potential for more accurate cytology research and biomedical tests in the future.

关键词： Silk protein Biomaterials Composite Mechanical properties Natural product

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Automatic salient object sequence rebuilding for video segment analysis

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Science China(Information Sciences) 2018年第1期61卷 249-260页

作者： Tie LIU Haibin duan yuanyuan SHANG Zejian yuan Nanning ZHENG School of Automation Science and Electrical Engineering Beihang University Information Engineering College Capital Normal University The School of Electronic and Information Engineering Xi'an Jiaotong University

Detection of salient object sequences from video data is challenging when the salient object changes between consecutive frames. In this study, we addressed the salient object sequence rebuilding problem with video segment analysis. We reformulated the problem as a binary labeling problem, analyzed the potential salient object sequences in the video using a clustering method, and separated the salient object sequence from the background by applying an energy optimization method. Our proposed approach determines whether temporal consecutive pixels belong to the same salient object sequence. The conditional random field is then learned to effectively integrate the salient features and the sequence consecutive constraints.A dynamic programming algorithm was developed to resolve the energy minimization problem *** results confirmed the ability of our approach to address the salient object rebuilding problem in automatic visual attention applications and video content analysis.

关键词： salient object video attention sequence segment analysis conditional random model

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