搜索结果: 16-30 共查到“知识库 测绘仪器”相关记录158条 . 查询时间(4.759 秒)
Digital Cameras for a Photogrammetric Production Environment: a Test of the Geometric Stability and Accuracy
Photogrammetry Mapping Digital Camera Geometry Accuracy
2015/11/23
The use of digital cameras in the photogrammetric work flow has gained widespread acceptance over the past few years. Whereas the geometric specifications of analogue aerial cameras have been thorough...
Application of GPS in Distributed SAR Satellite
Distributed SAR Satellite DEM GPS INSAR GMTI Baseline Estimation
2015/11/20
In this paper, we proposed a new Distributed SAR Satellite(DSS) using one passive satellite with a dual receive antenna(DRA) flying in formation with an already existing conventional SAR satellite. Su...
Study on Application of Three-Dimensional Laser Scanning Imaging System in Tree Measuring
Forestry Surveying laser scanning Precision Three-dimensional Modelling
2015/11/20
In this paper, 3-D laser scanning imaging system was introduced to forestry measurement for data collection. Then the paper discussed the method for stand volume measure and crown measure by the new e...
Laser Scanning Support Architectural Mappings and Historical Urban View Analysis
cultural heritage laser scanning surveying mapping urban analysis
2015/11/13
Spilamberto is a little country near Modena (Italy), that expanded all around the original medieval Castle. Rocca Rangoni was a part of this Castle, was built at the beginning of XIII century and was ...
Documentation and Monitoring of Intangible Cultural Heritage - A 21st Century Approach
Cultural Heritage Modeling Analysis Monitoring Education Landscape
2015/11/13
Domains in which intangible and tangible cultural heritage are manifested are explored and a rational practical place-based descriptive model is devised - drawing on desk research and field studies. T...
Visualization of the Architecture Through Simplified Models: Strategies for Knowledge Sharing Pieve a Socana, Casentino, Toscana
Digital Databases Internet/Web Mapping Surveying
2015/11/13
The problem of the quality of architectural representation, in a dynamic use finalized in web or database publication, represents the main theme of the current debate regarding the ways in which to sh...
Change-only Modeling in Navigation Geo-databases
Change-Only Updating Navigation Road Network GDF
2015/10/12
Navigation geo-database is the foundation and vital component of vehicle navigation system. Now almost geo-database is stored in
hardware, such as CD, DVD. But, with the development of urban constru...
Limit Theory for Panel Data Models with Cross Sectional Dependence and Sequential Exogeneity
Panel Data Models Sequential Exogeneity
2015/9/22
The paper derives a general Central Limit Theorem (CLT) and asymptotic distributions for sample moments related to panel data models with large . The results allow for the data to be cross sec...
Semiparametric Causality Tests Using the Policy Propensity Score
Potential outcomes conditional independence
2015/9/22
Time series data are widely used to explore causal relationships, typically in a regression
framework with lagged dependent variables. Regression-based causality tests rely on an
array of functional...
Higher Order Properties of Bootstrap and Jackknife Bias Corrected Maximum Likelihood Estimators
Bootstrap and Jackknife Bias Likelihood Estimators
2015/9/22
Pfanzagl and Wefelmeyer (1978) show that bias corrected ML estimators are higher order efficient.
Their procedure however is computationally complicated because it requires integrating complicat...
MEAN SQUARED ERROR REDUCTION FOR GMM ESTIMATORS OF LINEAR TIME SERIES MODELS
GMM LINEAR TIME SERIES MODELS
2015/9/22
In this paper we analyze Generalized Method of Moments (GMM) estimators for time
series models as advocated by Hansen and Singleton. It is well known that these estimators
achieve efficiency bo...
Difference in Difference Meets Generalized Least Squares: Higher Order Properties of Hypotheses Tests
panel data treatment eff ect GLS
2015/9/22
We investigate estimation and inference in difference in difference econometric models
used in the analysis of treatment effects. When the innovations in such models display serial
...
This paper extends kernel weighted GMM estimators recently proposed by the author in
the context of homoskedastic processes to a class of models with conditionally heteroskedastic
innovations. GMM e...
Discontinuities of Weak Instrument Limiting Distributions
weak instruments two stage least squares near non-identiÖ cation
2015/9/22
We consider two stage least squares (2SLS) estimators of a simple simultaneous equations
model when identiÖcation fails asymptotically. We investigate how the limiting distribution
of the estim...
EFFICIENT IV ESTIMATION FOR AUTOREGRESSIVE MODELSWITH CONDITIONAL HETEROGENEITY
AUTOREGRESSIVE CONDITIONAL HETEROGENEITY
2015/9/22
This paper analyzes autoregressive time series models where the errors are assumed to
be martingale difference sequences that satisfy an additional symmetry condition on their
fourth order mom...