The interacting multiple model (IMM) algorithm is applied to the TDoA (time difference of arrival) passive location system and a hybrid CV-Singer model which can be used to track maneuvering targets is presented.
The variety of the Chinese modernization choice and development,time difference and paradox in the process of Chinese modernization in the 20th century,are mainly sources of the conflict between modern and antimodern and the dispute between modern consciousness and antimodern consciousness.
Based on the analysis of magnetic daily variation in two magnetic base stations,this paper puts forward a measure method of the equation of time between stations with correlation coefficient and reduces a calculating formula for correlation coefficient.
As shown in the practical applications, the average relative error of high resolution acoustic slowness log predicted is 6.80%, the maximum average relative error is 24.8% at 1.631 km while the minimum average relative error is 0.06% at 1.629 km. Therefore,it has wide application perspective.
The Capital Digital Seismic Network,covering Beijing,Tianjin and central Hebei province,has recorded 1186 new earthquakes with M≥1.0 during May 2002 to Dec.2003,in which the arrival time differences between longitudinal wave and transverse wave are 2~25 s.
The buried depths of 410km and 660km discontinuities under a station are acquired by the way of adjusting the depths of these two discontinuities in the velocity model until the theoretical arrival time differences of P 410 S and P 660 S with P well conformed to the observed.
Based on the quarterly data from 1981 to 2002,this paper investigates the credit cycles in China during the economic transition period and examines the interrelations between credit cycles and business cycles by time differences correlation analysis and Granger causality.
Conventional residual static correction method is normally implemen- ted in two steps:1)extraction of time difference from reflection events and 2)application of statics separated from the time differences.
Time difference of arrival (TDOA) is the positioning technique with the most potential in cellular mobile telecommunication systems.
The transit time difference of photoelectrons originating from different points of the photocathode does not exceed 1 ns.
These are the group velocity dispersion (GVD), the propagation time difference (PTD), and the aberrations of the lens.
In dense target and false detection scenario of four time difference of arrival (TDOA) for multi-passive-sensor location system, the global optimal data association algorithm has to be adopted.
By using the database, cues relating to sound source localization, including interaural time difference (ITD), interaural level difference (ILD), and spectral features introduced by pinna, are analyzed.
The efficiency of the sinks, among which the formation of bivacancies seemingly dominates, is not high, which predetermines the slowness of relaxation processes in the solid-phase diffusion zone.
The solution to the problem is obtained in the form of a double integral with respect to the ray parameter (slowness) and frequency.
The integral with respect to the slowness is transformed to a contour integral in the complex slowness plane and then reduced to the integral over the edges of the cut of the vertical slowness function and the semiresidues at the poles.
It is shown that the Stoneley wave is determined by the contributions of two poles in the complex plane of horizontal slowness.
One year following admission to school he received an oral vaccine against poliomyelitis and in the months thereafter he developed hyperkinesia, ataxia, and dystonia of limbs associated with extreme mental slowness.
Correlation characteristics and travel time differences for hydroacoustic signals under directional reception at different depth
Experimental data are presented for the cross-correlation coefficients and travel time differences of audible signals measured at distances of ～60 and ～120 km in an oceanic waveguide.
The small fluctuations of the travel time differences (≤0.43 ms for the "water" signals and ≤0.63 ms for the signals reflected from the sea surface) testify to their high stability.
The factors responsible for the low correlation coefficients and the relatively high fluctuations of the arrival time differences are discussed.
The ability to detect the motion of an auditory target based on dynamic changes in interaural time differences was measured as a function of interaural correlation and acoustic spectrum in a single-interval forced-choice design.