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Phase precession of theta pulsing cells in the hippocampus

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Phase precession of theta pulsing cells in the hippocampus

中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Lu ZHANG~1,Xiao-Yu MA~1,Ying WANG~(1,2),Jing-Yi WANG~1,Long-Nian LIN~(1,*) 1 Key Laboratory of Brain Functional Genomics(Ministry of Education),East China Normal University,Shanghai 200062,China 2 Biomedical Research Institute of Shenzhen PKU-HKUST Medical center,Shenzhen 518036,China

＜正＞Objective Theta is the dominant oscillation of local field potentials（LFPs） recorded in rodenl hippocampus during voluntary behaviors as well as rapid-eye-movement（REM） *** theta oscillations, diverse types of hippocampal neurons including pyramidal cells and distinct GABAergic intemeurons cooperated in time for theta rhythm generation and information *** we reported a new type of neuron recorded in mouse hippocampal CA1,firing one spike per theta circle during theta and silencing during non-theta period,thus called theta pulsing *** in this study we also explore the phase precession of theta pulsing cells during active exploration（AE） and *** Spike and LFPs signal were recorded in hippocampal CA1 of C57BL/6J mice in vivo by 96-channel Plexon ***（1） Theta pulsing cells fired at theta frequency and silent during nontheta period,which was of distinct activity from both pyramidal cells and interneurons reported previously.（2） During AE the firing rhythm of theta pulsing cells is faster than LFP theta,representing a phase precession of 273.03 degree, which is comparable with that of hippocampal place *** REM,theta pulsing cells fired slower than LFP theta rhythm with phase precession 475.30 degree,which was longer than a theta circle.（3） Theta pulsing cells represented spike-field activity-delay with LFP *** The newly reported theta pulsing cells in hippocampal CA1 was less likely to contribute to theta generation but might provide a clock-like reference for phase precession.

关键词： theta pulsing cell hippocampus theta oscillations phase precession

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社区人群高血压综合防治效果初探

上海预防医学 2001年第10期13卷 463-465页

作者：苏竹君张建中毕璐璐陶燕平陈冬冬叶葶葶郑频频朱靳良傅华上海市徐汇区疾病预防控制中心上海200032 上海市徐汇区永嘉地段医院上海200020 复旦大学公共卫生学院上海200032

[目的 ]　了解高血压综合防治效果。　 [方法 ]　在某社区 1998年 4月对 35岁以上居民高血压普查的基础上 ,设干预组和监测组 ;在干预组的高血压者中进行以三级管理为主的综合防治 ,与 2 0 0 0年同期进行结果比较。　[结果 ]　社区 35... 详细信息

[目的 ]　了解高血压综合防治效果。　 [方法 ]　在某社区 1998年 4月对 35岁以上居民高血压普查的基础上 ,设干预组和监测组 ;在干预组的高血压者中进行以三级管理为主的综合防治 ,与 2 0 0 0年同期进行结果比较。　[结果 ]　社区 35岁以上人群 ,收缩压显著下降 ;干预组一、二、三级高血压患者收缩压和舒张压均显著下降 ,平均值达正常血压水平 (收缩压 14 0mmHg ,舒张压 90mmHg)。　[结论 ]　在该社区开展的综合防治是有效的。

关键词：社区高血压三级管理综合防治

Processing Method and Verification of Local Correlation for Spacecraft DOR signals

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Processing Method and Verification of Local Correlation for ...

Primary scientific results of Chang'E-1 lunar mission

第三届中国卫星导航学术年会

作者： Lue Chen1,2*, Geshi Tang1,2, Songtao Han1,2, Mei Wang1,2, Fei Fan31. Science and Technology on Aerospace Flight Dynamics Laboratory, Beijing 100094,China2. Beijing Aerospace Control center, Beijing 100094, China3. Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China

Differential One-way Ranging （DOR） is an interferometry method to obtain high precision delay in deep space exploration. Two stations track the same spacecraft to obtain high precision deep space spacecraft’s angle information. The process of DOR signal local correlation processing shows as follows, the model of DOR local signal is firstly constructed, then this model is used to do local correlation processing with the received spacecraft’s radio signal, to obtain high precision delay. Compared with the traditional DOR method, DOR local correlation processing method can be more effective in low SNR conditions to get correct measurement information. Firstly, prior delay model is calculated by orbit prediction, and the spacecraft’s emission frequency is calculated through effective frequency evaluation method, then the prior delay model and emission frequency are used to construct the DOR local model signal, then correlation phase is extracted by cross-correlation processing, finally, DOR group delay is calculated. This paper introduces the mathematical model of DOR local correlation processing in detail, and especially analyzes the technical difficulty in DOR local correlation processing. Based on the theoretical analysis, the algorithm of DOR local correlation processing is executed, and this method is verified by simulation,with the simulation measurement precision is about 0.1 ns,this verifies the effectiveness of DOR local correlation processing, and provides an effective technology for precise spacecraft orbit measurement.

关键词： Differential One-way Ranging local correlation processing,correlation phase, group delay

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Science China Earth Sciences 2010年第11期53卷 1565-1581页

The strategic plan for the development of the unmanned Chinese Lunar exploration Program is characterized by three distinct stages: "orbiting around", "landing on" and "returning from" the Moon. The first Chinese lunar probe, Chang'E-1, which was successfully launched on October 24th, 2007 at Xichang Satellite Launch center, and guided to crash on the Moon on March 1st, 2009, at 52.36°E, 1.50°S, in the north of Mare Fecunditatis, is the first step towards the "orbiting around" stage. The Chang'E-1 mission lasted 495 days, exceeding the expected life-span by about four months. A total of 1.37 TB raw data was received from Chang'E-1. It was then processed into 4 TB scientific data products at various levels. Many scientific results have been obtained by analyzing these data, including especially the "global lunar image from the first Chinese lunar explora- tion mission". All scientific goals of Chang'E-1 have been achieved. It provides much useful materials for further advances of lunar sciences and planetary chemistry. Meanwhile, these results will serve as a firm basis for future Chinese lunar missions.

关键词： lunar orbiter Chang’E-1 scientific data results

The Infection Process by a Green Fluorescent Protein-Tagged of Verticillium dahliae in Arabidopsis thaliana

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The two stage case-based reasoning technology research on the basis of the expert decision

中国植物病理学会2011年学术年会

作者： Zhao Pan~(1,2),Zhao Yun-long~(1,2),Zhao Jian-hua~(1,2),Duan cheng-guo~1,Guo hui-shan~(1*) (1.State Key Laboratory of Plant Genomics and National center for Plant Gene Research(Beijing), Institute of Microbiology,Chinese Academy of Sciences,Beijing,China 2.Graduate University of Chinese Academy of Sciences,Beijing,China)

＜正＞As a soil-borne phytopathogen,Verticillium dahliae Kleb（***） causes verticillium wilt diseases by infection through plant *** is known about the process of infection and ***,we report the first application of the hydroponic-culture Arabidopsis thaliana for exploration of the infection progress of *** seedlings cultured in liquid medium were inoculated with conidial suspension of a green fluorescent protein（GFP） -expressing isolate of ***（V592）.At an early infection stage,conidials randomly covered on surface of root-hairs *** germ tube emergence from the infected root surface,hyphal extended longitudinally along root epidermal *** certain hyphals were able to penetrate the root epidermal *** this process,there are no conspicuous structures,such as appressoria,formed,but a slightly swell at the hyphal apex,like the infection pegs,within cell junctions were observed,which direct penetration of hyphal to colonize the adjoining *** colonization progressed, elaborate hyphal networks were produced in vascular tissues and led to the eventual colonized the xylem vessels and extensive spread bidirectionally to stems and leaves or root *** grew along lateral root initiation points and staved the root tips were also *** data indicated that the root tip were not the initial infection point and V. dahliae does not develop a visible infection structures like other phytopathogens.

关键词： Arabidopsis hydroponic Verticillium dahiae GFP infection process

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Baosteel Technical Research 2010年第S1期4卷 99-页

作者： ZHOU Wei~(1)),HUANG Hui~(2)),WANG Sen~(1)),XU Wen~(1)) and ZHANG Hong~(2)) 1) Shanghai Baosight Software Co.,Ltd.,Shanghai 203209,China 2) Research center of Automation,Northeastern University,Shenyang 110004,Liaoning,China

In some domain expert's decision-making is intelligent output by comprehensive analysis and reasoning for the numerous decision-making factors,constraints and the goal in their domain,it is the concentrated expression of domain *** aimed at field knowledge induction;sum up the exploration with systematization method,the two stages case-based reasoning(CBR) technology on the basis of the expert decision cased is *** main idea,according to the characteristic of problem,analysis and decision process of field expert is carried out case-reasoning by two steps,and the field knowledge can be classified,induction and accumulated from different angles by multi case *** technology includes two aspects,first,through two state case-based reasoning mechanisms to achieve area of decision-making process simulation;second,the CBR service in two more cases of library design ***,two stage case-based reasoning mechanism,the first stage case-based reasoning to analyze the main level,clear nature of the problem,type,degree and character as the main content;the second stage case reasoning takes first order case reasoning result as basis then,the case reasoning,gives to making policy holding out being that purpose is in progress to out a decision-making suggestion once ***,in many cases the design of the library,to serve two-stage case-based reasoning process,the design of the four case libraries:First, property type case library,is a static case base can be modified,the effect is to performance differences between actual case and plan case of the qualitative distinction,indicate difference type attribute;Second, hierarchic quantization case library,is a static case base can be modified,the effect is to performance differences between actual case and plan case the quantitative distinction between the scope,indicate degree, size that the type issues in some difference *** are that decision-making supports case library,is a static case

关键词： CBR two stage case decision