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Research Interests of Our Lab --from Theories to Applications

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Presentation on theme: "Research Interests of Our Lab --from Theories to Applications"— Presentation transcript:

1 Research Interests of Our Lab --from Theories to Applications
Prof. YAN Lei School of Earth & Spatial Sciences Beijing Key Lab of Spatial Information Integration and Its Applications Peking University 2006.6

2 Content: GRV (General Relativity Verifying)
PSRS (Polarized Spectral Remote Sensing) UAV (Unmanned Air Vehicle ) RS System LBS (Location Based Services) ITS (Intelligent Transportation System) UUV (Unmanned Underwater Vehicles )

3 Content: GRV (General Relativity Verifying)
PSRS (Polarized Spectral Remote Sensing) UAV (Unmanned Air Vehicle ) RS System LBS (Location Based Services) ITS (Intelligent Transportation System) UUV (Unmanned Underwater Vehicles )

4 China Project to Verify General Relativity
Einstein’s General Theory of Relativity: gravity and motion can affect the interval of time and of space. Relating physical effects: geodetic effect 短程线效应 frame-dragging effect 坐标系拖曳效应 bending of starlight by gravity光线偏转 red shifted引力红移 Shapiro delay夏皮洛时延etc. Why prove them? new spatial devices… new survey manners… new time-space overview… GRV

5 To detect geodetic effect with high-resolution measurement system
The geodetic effect means that space warps towards the weighty mass and light objects accelerate towards heavier ones. Use a high precision gyroscope to verify the geodetic effect on the fact that space’s curve cause gyro’s precession. GRV

6 To inspect the frame-dragging effect
Frame-dragging effect implies that mass’s self-rotation can produce swirling space curve around it. An Inertial Measurement project, we propose, can accumulate the precession caused by earth’s self-rotation in the pole-around orbit. China has inertial instrument to satisfy so kind of high precision: 0.01 arcsec/year GRV

7 To compare the effect of light get red shifted in a gravitational field
red shifted (time slower) The gravity field intensity: moon surface weaker A clock for comparison can be carried to the moon-exploitation plan to prove General Relativity. GRV

8 To verify the Shapiro delay effect by combining two detectors
Light travels through gravity field with delay for space’s curve. In the moon- a radial-sensitive apparatus can be fixed on the moon. Its parallel work with the other one orbiting around the earth can measure the variance. GRV Earth Moon Next point

9 Content: GRV (General Relativity Verifying)
PSRS (Polarized Spectral Remote Sensing) UAV (Unmanned Air Vehicle ) RS System LBS (Location Based Services) ITS (Intelligent Transportation System) UUV (Unmanned Underwater Vehicles )

10 Future Past PSRS(Polarized Spectral Remote Sensing) Introduction
Measured information spectral + angular + polarization + vertical… PSRS Past Future Assumptions in retrievals Only to retrieve ~ everything retrieved Algorithm complexity AVHRR TOMS MODIS MISR POLDER APS AEROSAT

11 Characteristics of Electromagnetic Wave
Intensity----most popularly measured Polarization----to modify the intensity distribution in the space direction Phase---- to modify the intensity distribution at spatial position Frequency----to modify the intensity in the frequency field

12 Research engaged The three-dimensional polarized reflection spectra of land objects To measure the surface layer density and components of land objects Land objects soil rock Water …..

13 Rock polarized spectrum characteristics
PSRS Rock polarized spectrum curves and spectrum cubic chart at 60 o incidence in B band ( nm).

14 Soil polarized spectrum characteristics (1)
0o and 90o Polarized reflectance of brown forest soil at nm, incidence angle=40o PSRS

15 Soil polarized spectrum characteristics (2)
PSRS 0o and 90o Polarized reflectance of brown forest soil at nm, incidence angle=60o

16 Integrating sphere and polarization instruments
PSRS

17 Application Field Land objects recognition
Earth Surface Density measurement Moon or other planets surface detection Material thickness estimation Stealth and anti-stealth objects

18 Content: GRV (General Relativity Verifying)
PSRS (Polarized Spectral Remote Sensing) UAV (Unmanned Air Vehicle ) RS System LBS (Location Based Services) ITS (Intelligent Transportation System) UUV (Unmanned Underwater Vehicles )

19 UAV Remote Sensing Information System
Ultra-high, altitude: (10~30km) Ultra-low, altitude: (150~400m) UAV Remote Sensing Information System long time flexibility Ultra-low Ultra-high low-cost UAVRS

20 Remote sensing images gotten with the UAV system (1)
UAVRS Auto-spelled High-resolution Image with 3 Paralleled Digital Cameras

21 Digital RS images Blow-up
hight:500m speed:80km/h shutter: 1/1000 Ground resolusion:56mm

22 Remote sensing images gotten with the UAV system (2)
UAVRS Main Street Images of SHIHEZI City with Ortho-graph and Patched Treatments

23 Remote sensing images gotten with the UAV system (3)
UAVRS The remote sensing image shot on the UAV (1km high, 0.1m resolution)

24 Infrared images

25 SAR images

26 Countryside & duck Resolution: 2.25cm

27 UAV Remote Sensing Information System
Another question: data real-time processing Parallel calculation or collection apparatus: like Fourier lens mechanism, we suggested, for image compressing and transferring UAVRS

28 Content: GRV (General Relativity Verifying)
PSRS (Polarized Spectral Remote Sensing) UAV (Unmanned Air Vehicle ) RS System LBS (Location Based Services) ITS (Intelligent Transportation System) UUV (Unmanned Underwater Vehicles )

29 NAVISTAR (China Unicom)
search place destination original setting Navi detail On-line leading Surrounding state Self-driving Navigation LBS

30 Software Architecture
J2EE: efficient and transplantable First tier Client Wireless Device Middle tier Services Business logic Servlets / JSP EJBs Data tier Database Server data LBS

31 Multi-scale Presentation
LBS

32 Different services require different logic networks
Multi-logic levels Different services require different logic networks Self-driving navigation: road networks traffic rules road ranks road directions Public transport navigation: Transportation lines (subway, bus, urban rails and ship) Stations Transfer information LBS

33 Content: GRV (General Relativity Verifying)
PSRS (Polarized Spectral Remote Sensing) UAV (Unmanned Air Vehicle ) RS System LBS (Location Based Services) ITS (Intelligent Transportation System) UUV (Unmanned Underwater Vehicles )

34 Systematic Research Issues(4 stages)
Urban spatial distribution law and its dynamic features based on transportation: Research on universal law Social, psychological and economic factors affecting urban transportation: Individual behavior mechanism Basis for macroscopic decision on the coordinated development of urban area and transportation Remote Sensing Techniques for monitoring Experiment Platform & Techniques Basic Research Techniques & Platform Individual Decision Making:Effectiveness of macroscopic decision & Closed-loop Control Case-based Decision Making: Countermeasure based on macroscopic decision & Emergency Management Macroscopic Decision Countermeasure & Effectiveness ITS

35 Self-organized feedback close-loop theory of the transportation micro-adjustment
Overall process of the Mobile communication and random distributing traits of the public Mobile units active traffic information gathering units (traffic flow) 1.The stable random distribution of the Public moving unit 2.Way of feedback and gathering movement mode under various velocities 3.Wireless communication Channel (mode、data structures) 4.Feedback to where the people and goods happens ITS

36 Technological Structure and its extending effects

37 Information systems related to transportation
E-government Traffic emergency The reports for Video、Accident Monitor signal for Freeway Bus statue Video monitor for Subway The number & Location of Taxi Long-distance Info. Subway Info. The Capability of Buses, Road network Road network Status Taxi Info. Toll Level Info. Restriction Road Construction Hinge Infor. Freeway Status Dynamic Road-status Info. Bus Station Info. Road construction Bus line Road construction Bus line Freeway Status Restriction Road Construction Hinge Info. Freeway Status Problems: Lack of information share Disunity of data dictionary Different statistic result Complex data merge algorithm Results: Disharmony of high level control Feebleness in dealing with emergency Bus control center Freeway control Taxi control Traffic management …. …. Subway control center line-haul center

38 Content: GRV (General Relativity Verifying)
PSRS (Polarized Spectral Remote Sensing) UAV (Unmanned Air Vehicle ) RS System LBS (Location Based Services) ITS (Intelligent Transportation System) UUV (Unmanned Underwater Vehicles )

39 Background and Significance of UUV
To reduce the error of Inertial Navigation System (INS) accumulated with time To meet the demand of ”High Precision, Long Time, Self-determination, Passive ” of the underwater vehicle in the future Significance Apply in ground navigation such as taxi navigation, Location Based Service (LBS), Positioning with mobile phone etc. UUV

40 Basic Principles & Key Technologies
Principles of Underwater Passive Navigation System Underwater Gravity-Aided Navigation System, GANS Underwater Terrain-Aided Navigation System,TANS Sensor of Ocean Geographic Characteristics INS Data Base Matching Algorithm Optimum matching position emendation UUV

41 Underwater Terrain-Aided Navigation System
UUV

42 Simulation Platform UUV

43 Further Research UUV lyan@pku.edu.cn 13910821927

44 Conclude 6 aspects: GRV (General Relativity Verifying)
PSRS (Polarized Spectral Remote Sensing) UAV (Unmanned Air Vehicle ) RS System LBS (Location Based Services) ITS (Intelligent Transportation System) UUV (Unmanned Underwater Vehicles )

45 Thanks Prof. YAN Lei E-mail: lyan@pku.edu.cn
School of Earth & Spatial Sciences Beijing Key Lab of Spatial Information Integration and Its Applications Peking University 2006.6


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