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Processing of second-order cue in cat visual cortex

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Processing of second-order cue in cat visual cortex

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： Xiao-Jing GU,Bin GOU,Bing LI~* State Key Laboratory of Brain and Cognitive Science,institute of Biophysics,chinese {2. of {3.,beijing 100101,China

＜正＞Visual world is rich in objects delineated from the background by simply luminance variation,so called first-order cue,as well as those defined by contrast and texture,named second-order *** studies have shown that many neurons in early visual cortex respond to second-order stimuli（*** envelope and illusory contour）,when the spatial frequency of the stimulus carrier is beyond the pass-band of the *** there are still controversies on the processing of second-order cue in the *** the present study,PMLS（posteromedial lateral suprasylvian cortex） neurons of the cat are tested with moving composite stimuli,formed by modulating the contrast of a first-order grating （carrier）.The spatial frequencies of both the carrier and the moving contrast envelope are set to be the optimum of the cell, as a situation more close to the normal ecological *** a composite stimulus can be decomposed into three Fourier component gratings.A control stimulus is constructed by summing the same three component gratings,but the spatial phase of one component is shifted by 180 so that the contrast envelope is no longer *** comparing the responses to the composite stimuli and that to the control stimuli,we find that about 40%of the PMLS cells show significant responses to the second-order cue,in which the direction preference is similar to that for the first-order cue. This cue invariance has been observed in early visual cortex such as area 18 or ***,as compared with the neurons in area 18,the PMLS cells exhibit relatively stronger responses,shorter latency and higher direction selectivity to the second-order cue,indicating that the neural representation of second-order cue might be enhanced along the visual pathway toward the extrastriate *** results suggest that PMLS may play an important role in the processing of visual motion information defined by second-order cue.

关键词： second-order cue PMLS cat cue-invariance

Redescription of the Genus Cladiucha（Hymenoptera：Tenthredinidae） and Descriptions of Two New Species from　China

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Forest Ecosystems 1994年第1期 15-22页

作者： Xiao Gangrou Forest Research institute,chinese {2. of Forestry,{3. 100091

ＲｅｄｅｓｃｒｉｐｔｉｏｎｏｆｔｈｅＧｅｎｕｓＣｌａｄｉｕｃｈａ（Ｈｙｍｅｎｏｐｔｅｒａ：Ｔｅｎｔｈｒｅｄｉｎｉｄａｅ）ａｎｄＤｅｓｃｒｉｐｔｉｏｎｓｏｆＴｗｏＮｅｗＳｐｅｃｉｅｓｆｒｏｍＣｈｉｎａＸｉａｏＧａｎｇｒ... 详细信息

ＲｅｄｅｓｃｒｉｐｔｉｏｎｏｆｔｈｅＧｅｎｕｓＣｌａｄｉｕｃｈａ（Ｈｙｍｅｎｏｐｔｅｒａ：Ｔｅｎｔｈｒｅｄｉｎｉｄａｅ）ａｎｄＤｅｓｃｒｉｐｔｉｏｎｓｏｆＴｗｏＮｅｗＳｐｅｃｉｅｓｆｒｏｍＣｈｉｎａＸｉａｏＧａｎｇｒｏｕＦｏｒｅｓｔＲｅｓｅａｒｃｈＩ...

关键词： Hymenoptera Symphyta Tenthredinidae Cladiucha

Existence of the classical solution and almost periodic solution for the Camassa-Holm type equations

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Progress in Natural Science:Materials International 2004年第4期 17-22页

作者： YANG Ling'e and GUO Boling (1. Department of Mathematics, Foshan University, Foshan 52.000, China 2. Graduate School, China academy of Engineering Physics, Bejing 100088, China 3. {2. of Applied Physics and Computational Mathematics, {2. 100088, China) DepartmentofMathematics FoshanUniversityFoshan528000China instituteofAppliedPhysicsandComputationalMathematics Beijing100088China

Using Banach fixed point theorem and a priori estimate, the existence of periodic and almost periodic solutions of Ca-massa-Holm type equation with a nonlinear boundary condition are respectively proved when g (x, t) ... 详细信息

关键词： Camassa-Holm equation almost periodic solution existence.

Output tracking by ILC for stochastic systems

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Output tracking by ILC for stochastic systems

第二十一届中国控制会议

作者： CHEN Han-fu (institute of Systems Science academy of Mathematics and Systems Science,{2., {3. 100080)

＜正＞The paper proposes an iterative learning control （ILC） algorithm for a linear stochastic system presented in state space form to track a desired realizable trajectory. The control generated by the algorithm converges to the optimal one a. s. under the condition that the product input-output coupling matrices is full-column rank in addition to some assumptions on noises. No other knowledge about system matrices and covariance matrices is required.

关键词： iterative learning control stochastic system a. s. convergence tracking stochastic approximation

MiR-12. is required for proper cell proliferation in early development of Xenopus eye and brain

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MiR-124 is required for proper cell proliferation in early d...

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： Kai-Li LIU,Wei-Chuan MO,Ying LIU,Xiu-Mei WANG,Rong QIU,Rong-Qiao HE 1 The State Key Laboratory of Brain and Cognitive Science,institute of Biophysics,chinese {2. of {3., beijing 100101,China 2.Graduate School of the chinese academy of sciences,beijing 10003.,China

＜正＞Objective MiR-12. is one of the most abundant miRNAs enriched in developing and adult brain and eye.A recent report showed that miR-12. regulated adult neurogenesis in mammalian brain;however,its function in neural development remains *** have found that miR-12. starts to be expressed in Xenopus eye and brain from early neural development,and its overexpression leads to malformation of eye and *** present study is to reveal the cellular and molecular mechanisms of its role in early development of Xenopus eye and *** Effects of downregulation and overexpression of miR-12. on neurogenesis and expression of its target candidates in eye and brain were ***-12. precursor molecules or antisense inhibitor and/or mRNAs of miR-12. target candidates was microinjected into one dorsal-animal blastomere at 8-cell stage of Xenopus emebyos for gain-/loss-of functional and rescue *** proliferation in eye and brain was detected by BrdU incorporation and phosphorylated histone-H3.immunohistochemistry *** cells were identified by expression of NCAM and *** expression of neural markers and miR-12. target candidates was checked by RT-PCR,whole-mount in situ hybridization and ***（1） Downregulation of miR-12. decreases cell proliferation and upregulates expression of NCAM and N-tubulin during early neural development;while overexpression of miR-12. gives reverse effects.（2. MiR- 12. negatively regulates expression of candidate target neuroD1,which is expressed complementarily to miR-12. in eye and brain.（3. NeuroD1 overexpression effects in eye mimic that of miR-12. downregulation;and coinjection of neuroD1 with miR-12. can rescue the eye defects caused by overexpression of *** MiR-12. is required for the proper cell proliferation and targets neuroD1 in eye and brain during the early neural development.

关键词： miR-12. cell proliferation neural development neuroDl

Fuzzy Adaptive Kalman Filter Algorithm for RUAV's Integrated Navigation System

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Fuzzy Adaptive Kalman Filter Algorithm for RUAV's Integrated...

第2.届中国控制与决策会议

作者： Lei Dai 1,2., Chong Wu 1,2., Juntong Qi 1 , Janda Han 1 1. State Key Laboratory of Robotics, Shenyang institute of Automation, chinese academy of sciences, Shenyang 110016 China 2. Graduate School of the chinese academy of sciences, {3. 100049 China

The Kalman filter has characteristics of the noise-sensitive. This paper analyzes the adaptive Kalman filter algorithms which are based on Sage-Husae, neural network and fuzzy logic method. And an adaptive Kalman filter based on fuzzy logic is designed to estimate the attitude, heading and velocity of the RUAV. Combining the characteristics of RUAV platform and analyzing the real flight data, the fuzzy inference rules are designed to change the filtering parameters. With the actual flight data, the simulation verifies the validity of this algorithm. The experiments prove that this method can improve the navigation precision of RUAV.

关键词： Integrated Navigation Adaptive Kalman Filter Fuzzy Logic

Generalized Projective Synchronization Between Rssler System and New Unified Chaotic System

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Communications in Theoretical Physics 2007年第7期 132-136页

作者： LI Xin CHEN Yong1 Nonlinear Science Center and Department of Mathematics,Ningbo University,Ningbo 3.52.1,China2.institute of Theoretical Computing,East China Normal University,Shanghai 2.0062.China3.Key Laboratory of Mathematics and Mechanization,the chinese academy of sciences,{2. 100080,China

Based on symbolic computation system Maple and Lyapunov stability theory,an active control method isused to projectively synchronize two different chaotic systems—Lorenz-Chen-Lü system(LCL)and Rssler system,which belong to different dynamic *** this paper,we achieve generalized projective synchronization between thetwo different chaotic systems by directing the scaling factor onto the desired value *** illustrate our result,numerical simulations are used to perform the process of the synchronization and successfully put the orbits of drivesystem(LCL)and orbits of the response system(Rssler system)in the same plot for understanding intuitively.

关键词： Rssler system Lorenz-Chen-Lü system generalized projective synchronization scaling factor active control

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Web-based Employee Assistance Programs:a New Exploration of Employee Service

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Web-based Employee Assistance Programs:a New Exploration of ...

2.10 IEEE 2.d Symposium on Web Society

作者： Zhun Gong institute of Psychology,chinese {2. of {3.,beijing,China Shasha Yin {2. of Psychology and Behavior,Tianjin Normal University,Tianjin,China Yong Wang~(**) institute of Psychology,chinese {2. of {3.,beijing,China

＜正＞Employee Assistance Programs（EAPs） are free, voluntary benefit which plan to help employees and their families cope with everyday *** provide a wide range of services including short-term counseling,crisis intervention,occupational mental health and *** their rise approximate fifty years ago,EAPs have undergone fundamental *** have extended range and deepened the intensity of the services which they offer to employees and currently many EAPs offer a wider range of *** the number of EAPs has grown,their organizational structure has become increasingly more complex and need a fire-new pattern to adapt *** appearance of web has just met the demand of EAPs’ development,and it forms a new mode:web-based Employee Assistance *** article describes EAPs,their history,development,and reviews the cases of web-based Employee Assistance *** sets the stage for considering EAPs as we move into the web-based century.

关键词： EAPs(Employee Assistance Programs) web-based EAPs employees employers the Internet

Microbial carbonates in Holocene beachrocks,Shuiweiling,Luhuitou Peninsula,Hainan Island

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Science China Earth sciences 2008年第1期51卷 30-40页

作者： TENG JianBin1,2.& SHEN JianWei1 1 Department of Marine Geology, South China Sea institute of Oceanology CAS Key Laboratory of Marginal Sea Geology, South China Sea institute of Oceanology,{2., Guangzhou 5103.1, China 2.Graduate University of the{2., beijing 100049, China Department of Marine Geology South China Sea Institute of Oceanology CAS Key Laboratory of Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301 China Graduate University of the chinese academy of Sci Department of Marine Geology South China Sea Institute of Oceanology CAS Key Laboratory of Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301 China

Two research methods, geomicrobiology and carbonate sedimentology, were adopted to study the microbial carbonates in the beachrocks, Shuiweiling, Luhuitou, Sanya City, Hainan Island. The results indicate that microbial carbonates occur in Shuiweiling beachrocks and cements related to microbial activitives are common. Microbial carbonates were mainly developed on the surfaces of coral skeletons and within the coral (fragments and shivers) skeletal cavities,and rarely grew in interspaces formed by coral and other biological detritus. The growth morphologies of microbial carbonates are various, including stromatolitic lamination, thin crusts, dome-like, and microbialites. Microbial carbonates commonly trap fine-sized bioclasts, contain tubular filaments, and show laminated growth striation. Microbial carbonates within the coral skeletal cavities are generally stromatolitic cone-shaped, with a random growth direction along the bearing of trend of cavities, showing distinct growth laminae and recognizable growth phases. It is a special growth pattern of crypt microbial carbonates. Microbial cements occur mainly in shape of needle cement, calcified filaments, microborings, and calcified framboidal spheres. The needle cement is the most common type. These microbial cements indicate that microbial activities and microbial carbonates played an important role in beachrock formation in which carbonates were dominant components and the climate of tropical ocean monsoon was influential. Such microbial carbonates and microbial cementation have not been reported here from beachrocks along the northern shorelines of the South China Sea. The results support a clear microbial origin for certain carbonate cements in beachrocks, confirm that microbial carbonates are a significant contributor to carbonate sedimentation, and widen the knowledge of beachrocks from a new field.

关键词： microbial carbonates microbial cements beachrock Holocene Hainan Island

维普期刊数据库