搜索结果: 31-45 共查到“理学 Performance”相关记录490条 . 查询时间(0.234 秒)
Concord grape juice, cognitive function, and driving performance: a 12-wk, placebo-controlled, randomized crossover trial in mothers of preteen children
cognitive function driving flavonoids grape juice polyphenols cognition anthocyanins memory
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2018/11/28
Background: Daily consumption of Concord grape juice (CGJ) over 3–4 mo has been shown to improve memory function in adults with mild cognitive impairment and reduce blood pressure in hypertensive adul...
An implementation of the soft-sphere discrete element method in a high-performance parallel gravity tree-code
Bulk solids Solar system DEM Hopper SSDEM
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2015/12/25
We present our implementation of the soft-sphere discrete element method (SSDEM) in the parallel gravitational N-body code pkdgrav, a well-tested simulation package that has been used to provide many ...
Performance of a Practical Two-Step Detector for Non-Fluctuating Targets
Practical Two-Step Detector Non-Fluctuating Targets
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2015/9/29
In this paper we analyze a two-step detection scheme for use in distributed sensor systems (e.g. statistical MIMO radar). The scheme arises when a data rate restriction forces each of the distributed ...
PERFORMANCE ASSESSMENT METHOD FOR SPEECH ENHANCEMENT SYSTEMS
PERFORMANCE ASSESSMENT METHOD SPEECH ENHANCEMENT SYSTEMS
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2015/9/29
A new method to assess noise reduction algorithms with respect to their ability to enhance the perceived quality of speech is presented. Such algorithms consist of both single-microphone systems and m...
Performance of the INGV National Seismic Network from 1997 to 2007
seismic networks seismicity real-time seismology Italy Italian Seismic Bulletin
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2015/9/1
Seismic monitoring in Italy has strongly improved since the 1997 Umbria-Marche earthquake sequence. This has made the National Seismic Network (RSN) a powerful tool both to rapidly locate and quantify...
Performance of electrical spectroscopy using a RESPER probe to measure salinity and water content of concrete and terrestrial soil
Explorative Geophysics Concrete and Terrestrial Soil Non-destructive Testing Methods Electrical Resistivity and Salinity Permittivity and Volumetric Water Content
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2015/8/27
This paper discusses the performance of electrical spectroscopy using a RESPER probe to measure the salinity s and volumetric content θW of the water in concrete or terrestrial soil. The RESPER probe ...
Evaluation of automatic ionogram scaling for use in real-time ionospheric density profile specification: Dourbes DGS-256/ARTIST-4 performance
Ionosphere Plasma Physics Wave propagation Instruments and techniques
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2015/8/24
Statistical evaluation of the Dourbes (4.6˚E, 50.1˚N) digisonde automatic scaling of the more frequently used ionospheric parameters (foF2, foF1, foE, h’F2, h’F, h’E, and M3000F2) was perfor...
Comparative performance of generalized additive models and multivariate adaptive regression splines for statistical modelling of species distributions
Distribution Environment Fish Freshwater Generalized additive model Multivariate adaptive regression splines
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2015/8/21
Two statistical modelling techniques, generalized additive models (GAM) and multivariate adaptive regression splines (MARS), were used to analyse relationships between the distributions of 15 freshwat...
MEASURING COMPLETE GROUND-TRUTH DATA AND ERROR ESTIMATES FOR REAL VIDEO SEQUENCES, FOR PERFORMANCE EVALUATION OF TRACKING, CAMERA POSE AND MOTION ESTIMATION ALGORITHMS
Vision robotics tracking navigation registration
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2015/8/14
Fundamental tasks in computer vision include determining the position, orientation and trajectory of a moving camera relative to an
observed object or scene. Many such visual tracking algorithms hav...
Subharmonic functions and performance bounds on linear time-invariant feedback systems
Harmonic function linear the performance of the single output system a linear control system the harmonic function
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2015/8/13
In this paper we study multi-input multi-output (MIMO) linear time-invariant (LTI) control systems. We show that some well known constraints on the performance of single-input single-output (SISO) lin...
Linear controller design: Limits of performance via convex optimization
Linear controller design convex optimization linear control system the convex optimization algorithm the controller the transfer matrix
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2015/8/12
In this tutorial, an approach to the analysis and design of linear control systems based on numerical convex optimization over closed-loop maps is presented. Convexity makes numerical solution effecti...
Closed-loop convex analysis of performance limits for linear control systems
Linear control system computer aided control system and design a linear controller convex optimization digital signal processor
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2015/8/12
In closed-loop convex analysis and design, the linear controller design problem is reformulated as a convex optimization problem, which may be more easily solved than the problems resulting from conve...
Improving static performance robustness of thermal processes
Static performance robustness and control design nonlinear model static state feedback controller
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2015/8/12
A static (steady-state) robust control design problem is considered using a nonlinear model of a thermal system. For a given operating point, the control problem is to determine a feedforward/feedback...
Performance bounds for linear stochastic control
Stochastic control Model predictive control Linear matrix inequality Convex optimization
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2015/8/10
We develop computational bounds on performance for causal state feedback stochastic control with linear dynamics, arbitrary noise distribution, and arbitrary input constraint set. This can be very use...
Controller coefficient truncation using Lyapunov performance certificate
Delete coefficient linear controller coefficient of linear matrix inequality lmi the numerical values
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2015/8/7
We describe a method for truncating the coefficients of a linear controller while guaranteeing that a given set of relaxed performance constraints is met. Our method sequentially and greedily truncate...