Removing Labeled Text in an Image Based on an Extended Filter in Gabor Space

2011 ◽  
Author(s):  
Jun Yang ◽  
Shi-jiao Zhu
Keyword(s):  
Extended Filter

APC Retrofits and Technologies Lower Emissions and Optimize WTE Production

2002 ◽  
Author(s):  
Robin Linton
Keyword(s):  
Pollution Control ◽  
Electrostatic Precipitator ◽  
Collection Efficiency ◽  
Waste To Energy ◽  
Air Pollution Control ◽  
Fabric Filter ◽  
Maintenance Time ◽  
Media Change ◽  
Extended Filter ◽  
Existing Housing

Air pollution control (APC) systems in waste-to-energy (WTE) plants are facing many of the same challenges that independent power facilities (IPP) have dealt with for years. The most prevalent problems being corrosion and emissions. An IPP plant in the southeastern U.S. illustrates the cause and effect that corrosion played in the plant’s operation, as well as the engineered solution designed to address the issue. The result has performed beyond expectations and lends itself well to the same issues in the WTE plants. The paper also provides information regarding the conversion of the electrostatic precipitator (ESP) to a fabric filter baghouse. By utilizing the existing housing of an ESP, a higher particulate collection efficiency can be achieved at a fraction of the capital cost. Finally, the paper discusses filter changeout to filter bags laminated with highly efficient expanded polytetrafluoroethylene (ePTFE) membrane. This media change addresses the demanding environmental regulations the industry faces, as well as providing benefits to the WTE APC system such as superior cleandown, increased airflows, and extended filter life. The ultimate results of these three technologies can help decrease maintenance time and cost and increase WTE facility production.

Output Feedback Adaptive Robust Control of Linear Motors With Negligible Electrical Dynamics

2000 ◽  
Author(s):  
Li Xu ◽  
Bin Yao
Keyword(s):  
High Performance ◽  
Adaptive Robust Control ◽  
Tracking Accuracy ◽  
Initial State ◽  
Robust Controller ◽  
Estimation Errors ◽  
Parameter Adaptation ◽  
Linear Motors ◽  
Disturbance Estimation ◽  
Extended Filter

Abstract This paper studies high performance robust motion control of linear motors that have a negligible electrical dynamics. A discontinuous projection based adaptive robust controller (ARC) is constructed. Since only output signal is available for measurement, an observer is designed to provide exponentially convergent estimates of the unmeasurable states. This observer has an extended filter structure so that online parameter adaptation can be utilized to reduce the effect of the possible large nominal disturbance. Estimation errors that come from initial state estimates and uncompensated disturbances are effectively dealt with via certain robust feedback at each step of the ARC backstepping design. Theoretically the resulting controller achieves a guaranteed transient performance and a prescribed final tracking accuracy. In the presence of parametric uncertainties only, asymptotic output tracking is also achieved. This scheme is implemented on an epoxy core linear motor. Extensive experimental results are presented to illustrate the effectiveness and the achievable control performance of the proposed scheme.

scholarly journals Multitarget Tracking by Improved Particle Filter Based on Unscented Transform

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Yazhao Wang
Keyword(s):  
Particle Filter ◽  
Particle Filtering ◽  
Measurement Noise ◽  
Multitarget Tracking ◽  
Unscented Transform ◽  
Cluttered Environment ◽  
Nonlinear Tracking ◽  
Linear And Nonlinear ◽  
Simulation Results ◽  
Extended Filter

This paper considers the problem of multitarget tracking in cluttered environment. To reduce the dependency on the noise priori knowledge, an improved particle filtering (PF) data association approach is presented based on the filter (HF). This approach can achieve higher robustness in the condition that the measurement noise prior is unknown. Because of the limitations of the HF in nonlinear tracking, we first present the unscented filter (HUF) by embedding the unscented transform (UT) into the extended filter (HEF) structure. Then the HUF is incorporated into the Rao-Blackwellized particle filter (RBPF) framework to update the particles. Simulation results are provided to demonstrate the effectiveness of the proposed algorithms in linear and nonlinear multitarget tracking.

A Tracking Algorithm for Blind Navigation Based on Robust H Infinity Filter

2013 ◽  
Vol 448-453 ◽  
pp. 3580-3585
Author(s):  
Fu Cheng Cao ◽  
Guang Liang Cheng ◽  
Li Rong Wang
Keyword(s):  
Joint Estimation ◽  
Rfid Tags ◽  
Observation Error ◽  
Error Statistics ◽  
H Infinity ◽  
Blind And Visually Impaired ◽  
Points Of Interest ◽  
Visually Impaired People ◽  
Current Location ◽  
Extended Filter

This paper presents an algorithm for blind and visually impaired people to track their location. A precise positioning system utilizes UWB RFID tags for localization to mark points of interest. Given the joint estimation of TOA and DOA from blind person to station, a robust algorithm based on the extended filter is presented to accurately estimate their current location and moving velocity. This method is effective to the no-Gaussian or biased system model with unknown or not fully known observation error statistics.

scholarly journals Flexitrate regional citrate anticoagulation in continuous venovenous hemodiafiltration: a retrospective analysis

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Ilan Lenga ◽  
Wilma M. Hopman ◽  
Adam J. O’Connell ◽  
Francesca Hume ◽  
Charles C. Y. Wei
Keyword(s):  
Intensive Care ◽  
Metabolic Control ◽  
Ionized Calcium ◽  
Regional Citrate Anticoagulation ◽  
Citrate Anticoagulation ◽  
Intensive Care Patients ◽  
Filter Life ◽  
Heparin Anticoagulation ◽  
Metabolic Outcome ◽  
Extended Filter

Abstract Background Flexitrate, an innovative regional citrate anticoagulation (RCA) protocol, was compared to traditional RCA (tRCA) and Heparin anticoagulation protocols in intensive care patients treated with continuous renal replacement therapy (CRRT). Methods A single-center, retrospective, cohort study, was done in a 26-bed intensive care unit in a large community hospital. Eighty dialysis sessions (Flexitrate = 2852 h, tRCA = 3580 h and Heparin = 2026 h), performed in 53 patients, were evaluated for filter life, RCA control, and metabolic control. Results In the Flexitrate cohort, 3.8% of filters clotted, compared to 16.9% with tRCA and 28.3% with Heparin (p < 0.001 for Flexitrate compared to either tRCA or Heparin). Filter survival was significantly improved with Flexitrate compared to tRCA (HR 0.24, p = 0.018) or Heparin (HR 0.14, p = 0.004). Anticoagulation control was superior with Flexitrate with Patient Ionized Calcium out of target a median of 16% of the time, compared to 27% for tRCA (p < 0.001). Filter Ionized Calcium was out of target a median of 6.8% of the time, compared to 23% for tRCA (p = 0.03). Flexitrate produced significantly less alkalosis, hypernatremia, and hypocalcemia than tRCA, and overall metabolic control was comparable to Heparin anticoagulation. The only adverse metabolic outcome with Flexitrate was increased hypomagnesemia. Conclusions The Flexitrate protocol extended filter life, delivered more consistent anticoagulation, and provided superior metabolic control compared to a tRCA protocol. Filter life was superior to Heparin anticoagulation, with similar metabolic control. A randomized control trial comparing these protocols is recommended.

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