Instructors/Speakers Prof. Zixiang XIONG Department of Electrical and Computer Engineering Texas A&M University Abstract In the past decade, much progress has been made in image denoising due to the use of low-rank representation and sparse coding. In the meanwhile, state-of-the-art algorithms also rely on an iteration step to boost the denoising performance. However, the boosting step is fixed or non-adaptive. In this work, we perform rank-1 based fixed-point analysis, then, guided by our analysis, we develop the first adaptive boosting (AB) algorithm, whose convergence is guaranteed. Preliminary results on the same image dataset show that AB uniformly outperforms existing denoising algorithms on every image and at each noise level, with more gains at higher noise levels. Biography Zixiang Xiong received ...
seminarslectures
Calendar of Events
|
M
Mon
|
T
Tue
|
W
Wed
|
T
Thu
|
F
Fri
|
S
Sat
|
S
Sun
|
|---|---|---|---|---|---|---|
|
1 event,
-
|
0 events,
|
0 events,
|
1 event,
-
Instructors/Speakers Prof. Manabu SHIRAIWA Assistant Professor Department of Chemistry University of California Irvine, California USA Abstract Multiphase chemical processes of oxidants and aerosol particles are of central importance in aerosol effects on outdoor and indoor air quality and public health. Kinetic multi-layer models for gas-particle interactions and multiphase chemistry have been developed that explicitly treat mass transport and chemical reaction of semi-volatile species partitioning between gas and condensed phases. These models have been applied to gas uptake and chemical aging of organic aerosols as well as formation and evolution of secondary organic aerosols. Secondary organic aerosols (SOA) are ubiquitous in the atmosphere. SOA can occur in amorphous solid or semi-solid phase states depending on chemical composition, relative humidity (RH), and ... |
0 events,
|
0 events,
|
0 events,
|
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
|
1 event,
-
Instructors/Speakers Dr. Yangxi CHU Postdoctoral Fellow School of Energy and Environment City University of Hong Kong Hong Kong, China Abstract Viscosity of secondary organic aerosol (SOA) particles is important because it influences the phase state, hygroscopic growth and heterogeneous chemistry of SOA particles but remains poorly characterized. To investigate the effect of hydroxyl functional group on SOA viscosity, in this work, the viscosity of erythritol (i.e., 1,2,3,4-butanetetrol) – water particles was measured as a function of water activity using the bead-mobility, aerosol optical tweezer and rectangular fluorescence recovery after photobleaching (rFRAP) techniques. The viscosity of pure erythritol was determined by extrapolating the experimental data to zero water activity. By combining with literature data, the increase in viscosity from the addition ... |
0 events,
|
0 events,
|
1 event,
-
Instructors/Speakers Prof. Qin SHENG Professor Department of Mathematics and Center for Astrophysics, Space Physics, and Engineering Research (CASPER) Baylor University Texas U.S.A. Abstract Many finite difference methods that involve spatial adaptation employ an equidistribution principle. In these cases, a new mesh is constructed such that a given monitor function is equidistributed in some sense. Typical choices of the monitor function involve the solution or one of its many derivatives. This constructive strategy has been proven to be extremely effective and easy-to-use in multiphysical computations. However, selections of core monitoring functions are often challenging and crucial to the computational success. This talk concerns several different designs of the monitoring function that targets a highly nonlinear partial differential equation that exhibits both ... |
1 event,
-
Instructors/Speakers Prof. Lancelot F. JAMES Director of PhD and MPhil programs, School of Business and Management Professor of Information Systems, Business Statistics, and Operations Management (ISOM), HKUST Business School The Hong Kong University of Science and Technology (HKUST) Abstract t is known random partitions of the integers may be obtained by a process of discovery of excursion intervals of generalized notions of Bessel processes, with the most prominent example being Brownian motion or Brownian bridge. This leads to the two parameter Chinese restaurant process, which has a variety of applications. Generalizations of this scheme lead to the general class of Gibbs partitions. We examine Gibbs partitions from different perspective and describe classes of random partitions that can be expressed in ... |
0 events,
|
0 events,
|
|
0 events,
|
0 events,
|
0 events,
|
0 events,
|
1 event,
-
Instructors/Speakers Prof. Yuanyuan TANG Assistant Professor School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen China Abstract Metal-laden wastes comprise a wide range of solid wastes including the sludge generated from industrial wastewater treatment processes, the dredged river sediment due to heavy metal contamination, the waste adsorbent after metal adsorption, as well as the tailings after mining activities. The wastes above always contain high levels of hazardous metals, such as nickel, copper, zinc, which may lead to metal bioaccumulation and cause adverse effects for ecosystem. Besides the existence of heavy metals, ceramic raw materials such as aluminium, iron and silicon have also been reported as major constituents in the above waste matrices. Therefore, converting the metal-laden ... |
0 events,
|
0 events,
|