[email protected] 139108219271 research interests of our lab --from theories to applications --from...

[email protected] 13910821927

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Research Interests of Our LabResearch Interests of Our Lab --from Theories to Applications--from Theories to Applications

Prof. YAN LeiProf. YAN Lei

School of Earth & Spatial SciencesSchool of Earth & Spatial Sciences

Beijing Key Lab of Beijing Key Lab of

Spatial Information Integration and Its ApplicationsSpatial Information Integration and Its Applications

Peking University 2006.6


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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 )

Content:


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Content:


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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

UAVRS

LBS

ITS

UUV

PSRS


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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

UAVRS

LBS

ITS

UUV

PSRS


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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

UAVRS

LBS

ITS

UUV

PSRS


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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

UAVRS

LBS

ITS

UUV

PSRS


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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.

Earth

Moon

Next point

GRV

UAVRS

LBS

ITS

UUV

PSRS


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Content:


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Measured informationMeasured informationspectralspectral

+ angular+ angular+ polarization+ polarization

+ vertical…+ vertical…P

ast

Fu

ture

Fu

ture

Assumptions in retrievalsAssumptions in retrievals

Only to retrieveOnly to retrieve

~ everything ~ everything retrievedretrieved

Algorithm complexityAlgorithm complexityAVHRRAVHRR TOMSTOMS MODISMODIS

MISRMISR POLDERPOLDERAPSAPS AEROSATAEROSAT

PSRS

UAVRS

LBS

ITS

UUV

PSRS(Polarized Spectral Remote Sensing) Introduction

GRV


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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


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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 …..


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Rock polarized spectrum characteristics

00. 20. 40. 60. 8

11. 21. 4

0 60 120 180 240 300

0

10

20

30

40

50

60

Rock polarized spectrum curves and spectrum cubic chart at 60 o incidence in B band (760-1100nm).

PSRS

UAVRS

LBS

ITS

UUV

GRV


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Soil polarized spectrum characteristics (1)

0o and 90o Polarized reflectance of brown forest soil at670-690nm, incidence angle ＝ 40o

PSRS

UAVRS

LBS

ITS

UUV

GRV


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Soil polarized spectrum characteristics (2)

0o and 90o Polarized reflectance of brown forest soil at670-690nm, incidence angle ＝ 60o

PSRS

UAVRS

LBS

ITS

UUV

GRV


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Integrating sphere and polarization instruments

PSRS

UAVRS

LBS

ITS

UUV

GRV


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Application Field

Land objects recognition Earth Surface Density

measurement Moon or other planets surface

detection Material thickness estimation Stealth and anti-stealth objects


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Content:


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UAV Remote Sensing Information System

• Ultra-high, altitude: (10~30km)

• Ultra-low, altitude: (150~400m)


long time flexibilityUltra-lowUltra-high

low-cost

UAVRS

PSRS

LBS

ITS

UUV

GRV


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Remote sensing images gotten with the UAV system (1)

Auto-spelled High-resolution Image with 3 Paralleled Digital Cameras

UAVRS

PSRS

LBS

ITS

UUV

GRV


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hight ： 500mspeed ： 80km/hshutter: 1/1000Ground resolusion ： 56mm

Digital RS images Blow-up


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Main Street Images of SHIHEZI City with Ortho-graph and Patched Treatments

UAVRS

PSRS

LBS

ITS

UUV

GRV


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The remote sensing image shot on the UAV (1km high, 0.1m resolution)

UAVRS

PSRS

LBS

ITS

UUV

GRV


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Infrared images


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SAR images


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Countryside & duck Resolution:

2.25cm


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UAVRS

PSRS

LBS

ITS

UUV

GRV

Another question: data real-time processing

Parallel calculation or collection apparatus:

like Fourier lens mechanism, we suggested, for image compressing and transferring


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Content:


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NAVISTAR (China Unicom)

searchplace

destination

originalsetting

Navi detail

On-lineleading

Surrounding state

Self-driving Navigation

LBS

ITS

UUV

UAVRS

PSRS

GRV

helen

Suppose I am going to Tiananmen from Peking Univ.


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Software Architecture

J2EE: efficient and transplantable

Data tier

Database Server

data

First tier

Client

Wireless Device

Middle tier

Services

Business

logic

Servlets /JSP EJBs

LBS

ITS

UUV

UAVRS

PSRS

GRV

helen

Generally, there are three kinds of architecture that we can choose from,J2EE, .NET, and CORBA.With consideration of its efficiency and transplantability, we choose J2EE.Here is a simplified architecture model of it.Basically, it consists of three tiers. Mobile terminal constitutes the first tier, which will interact with the middle tier.The middle tier contains various business logic, which should undertake most of the computing tasks.The data tier is designed to listen to and answer the data requests from the middle tier, where the spatial database is running.


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Multi-scale Presentation

LBS

ITS

UUV

UAVRS

PSRS

GRV

helen

In many situations, if all spatial objects are displayed in one scale, it'll become difficult for a user to identify the information he want. This asks for multi-scale representation.We may use multiple scales of spatial data sets in PNS applications. Usually, we use larger scale as the basic scale of map data set to generalize map data sets of other scales.


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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

ITS

UUV

UAVRS

PSRS

GRV

gaoanlai

There are various kinds of personal navigation services.Different service require different logic networks in order to help the users effectively and efficiently. For example,data for self-driving includes road networks, traffic rules, road ranks and road directions. Data for pedestrian navigation comprises overpass and underpass, data for self-driving and crosswalk. There are no needs to store road ranks and road directions. And for public transportation navigation, there should be transportation lines (subway, bus, urban rails and ship),stations, the subway entrance data, transportation transfer data and original data in XML (set speed and average waitingtime for each line).


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Content:


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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

UAVRS

LBS

PSRS

UUV

GRV


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Self-organized feedback close-loop theory of the transportation micro-adjustment

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 unit2.Way of feedback and gathering movement mode under various velocities3.Wireless communication Channel (mode 、 data structures) 4.Feedback to where the people and goods happens

G2W2W1 W3 W4 G0

Y Routel ine

TMBG1

F0F1Feedback of

Platform

Feedback of TMB

Traffic Management Bureau

X1

Bureau of TransportationX2

Bus CompanyX3

Collection

The Platform for Bureau of Transportation CITP Locale

－－

ITS

UAVRS

LBS

PSRS

UUV

GRV


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Technological Structure and its extending effects

Sensing and merging

Macro decision-making

Emergency reallocation

decision-making

Single decision-making

Entire congestion

soothing with optimization of the routes

Multi-level coordination

plan/estimation

Travel chain supply

Simulation of the chain traits

Evolvement and rules of

the space and time

Multi-mode macro

systems

Unstable miscellaneous system

Interrelationship of the Social factor for

traveling and the road network for

goods flow

Platform for Multi-thread spatio cooperation validation and its standards, protocols and data criterions

Multilevel monitoring of

RS

Mobile self-organized system with feedback

close-loops

resource deployment environment accident site real-time control central control control methods behavior adjustment

Transportation network

flow estimation

dictationSignal

control,roadstate

broadcast

Selection of road to lead the

congestion

Traveling rule

Accident locale

policemen monitoring centerTraffic signalsTraffic dictation

Mobile Units

Road deployment

Policemen ,Traffic state

Data Transfer,ac

cidentdealing

Information

flowT

raffic flowm

ethod

stheories

effects

Cause Procedure Results

resource deployment environment accident site real-time control central control control methods behavior adjustment

Transportation network

flow estimation

dictationSignal

control,roadstate

broadcast

Selection of road to lead the

congestion

Traveling rule

Accident locale

policemen monitoring centerTraffic signalsTraffic dictation

Mobile Units

Road deployment

Policemen ,Traffic state

Data Transfer,ac

cidentdealing

Information

flowT

raffic flowm

ethod

stheories

effects

Cause Procedure Results

BehaviorPeople/goodsdistribution of Goods

relationships


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E-government

Bus control center

Traffic management

Freeway control

Traffic emergency

Taxi control ….….

Road construction

Bus line

Freeway Status

Restriction

Road Construction

Hinge Info.

Freew

ay Status

Information systems related to transportation

The reports

for V

ideo 、 Accident

Monitor signal for FreewayBus statue

Video monito

r for

Subway

The number & Location of Taxi

The reports for Video 、 Accident

Long-distance Info.

Subway Info.

The Capability of Buses, Road network

Road network Status

Taxi Info.

Toll Level Info.

Restriction

Road Construction

Hinge Infor.

Freew

ay Status

Subway Info.

Dynamic Road-status Info. Bus S

tation Info.

Road construction

Bus line

Freeway Status

Problems ：Lack of information shareDisunity of data dictionaryDifferent statistic resultComplex data merge algorithm

Results ：Disharmony of high level control

Feebleness in dealing with emergency

line-haul center

Subway control center


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Content:


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Background and Significance of UUV

Background 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

UAVRS

LBS

PSRS

ITS

GRV


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Basic Principles & Key Technologies

Principles of Underwater Passive Navigation System

Underwater Gravity-Aided Navigation System, GANS

Underwater Terrain-Aided Navigation System,TANS

Sensor ofOcean Geographic

Characteristics

INS

Ocean Geographic Characteristics

Data Base

Matching Algorithm

Optimum matching position

emendation

UUV

UAVRS

LBS

PSRS

ITS

GRV


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Underwater Terrain-Aided Navigation System

Outputemendation

INS

Depth Measuring Equipment

Underwater Geographic Characteristics Map

Terrain Matching Algorithm

UUV

UAVRS

LBS

PSRS

ITS

GRV


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Simulation Platform

UUV

UAVRS

LBS

PSRS

ITS

GRV


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Further Research

Combined with practical engineering for semi-practicality

experimentation

Research on new principles such as wavelet, nerve network

Apply in ground navigation, pattern recognition

综合交通信息平台

iTG

寻呼网络

iTG

集群/GSM/GPRS/CDM

A移动网

iTG

DDN/PSTN

mTU

TF

dTU 移动终端

手机

PDA

车载

GPS GLONASS

1tG 2tG

DSRC路边装置

S7

综合交通信息平台

iTG

寻呼网络

iTG

集群/GSM/GPRS/CDM

A移动网

iTG

DDN/PSTN

mTU

TF

dTU 移动终端

手机

PDA

车载

GPS GLONASS

1tG 2tG

DSRC路边装置

S7

UUV

UAVRS

LBS

PSRS

ITS

GRV


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Conclude 6 aspects:


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ThanksThanks

Prof. YAN LeiProf. YAN LeiE-mail: E-mail: [email protected]

School of Earth & Spatial SciencesSchool of Earth & Spatial Sciences

Beijing Key Lab of Beijing Key Lab of Spatial Information Integration and Its ApplicationsSpatial Information Integration and Its Applications

Peking University 2006.6

[email protected] 139108219271 research interests of our lab --from theories to applications --from...

Documents

effect of light

geodetic effect frame

grv general relativity

shapiro delay effect

underwater vehicles

space warps

swirling space curve

space directionphase