Sequential combination methods for data clustering analysis
摘要:
This paper proposes the use of more than one clustering method to improve clustering performance. Clustering is an optimization procedure based on a specific clustering criterion. Clustering combination can be regarded as a technique that constructs and processes multiple clustering criteria. Since the global and local clustering criteria are complementary rather than competitive, combining these two types of clustering criteria may enhance the clustering performance. In our past work, a multi-objective programming based simultaneous clustering combination algorithm has been proposed, which incorporates multiple criteria into an objective function by a weighting method, and solves this problem with constrained nonlinear optimization programming. But this algorithm has high computational complexity. Here a sequential combination approach is investigated, which first uses the global criterion based clustering to produce an initial result, then uses the local criterion based information to improve the initial result with a probabilistic relaxation algorithm or linear additive model. Compared with the simultaneous combination method, sequential combination has low computational complexity. Results on some simulated data and standard test data are reported. It appears that clustering performance improvement can be achieved at low cost through sequential combination.
Oxime ether derivatives, a new class of nonsteroidal antiinflammatory compounds
作者:Jan Van Dijk、Jan M. A. Zwagemakers
DOI:10.1021/jm00219a018
日期:1977.9
pronounced antiinflammatory activity in the carrageenan-induced edema test in the rat. The activity was limited mainly to derivatives of p-haloacetophenone oxime and of p-halobenzaldehyde oxime. Nevertheless, the hydroxyethyl and carboxyalkyl groups may be converted into many derivatives with maintenance of activity. Some structure-activity relationships are in contrast to those of the well-known antiinflammatory
Wood treatment solutions containing fungicides and tertiary alkanolamines and related methods, wood products and composition for protection against fungal organisms
申请人:KOP-COAT, INC.
公开号:US11432546B2
公开(公告)日:2022-09-06
The present invention provides a solution and related composition of matter and methods which synergistically improves a fungicide's effectiveness in resisting undesired fungal growth. The invention also provides wood and wood products which have been treated with the solution, method or compound.
HARD SURFACE CLEANERS COMPRISING LOW VOC, LOW ODOR ALKANOLAMINES
申请人:Dow Global Technologies LLC
公开号:EP2640816A1
公开(公告)日:2013-09-25
Hard Surface Cleaners Comprising Low VOC, Low Odor Alkanolamines
申请人:Busby Molly I.
公开号:US20130196893A1
公开(公告)日:2013-08-01
Hard surface cleaning compositions comprise: A. Surfactant, e.g., a nonionic ethoxylated alcohol; B. Solvent, e.g., propyleneglycol n-butyl ether; C. Low VOC, low odor, alkanolamine selected from the group consisting of tris(hydroxymethyl)amino methane; 2-amino-2-methyl-1,3-propanediol; 2-amino-2-ethyl-1,3-propanediol; 2-amino-2-methyl-1-propanol; N,N-dimethylamino-2-methyl-1-propanol; and 3-amino-4-octanol; D. Water, and E. Optionally, one or more of an alkaline agent, builder, fragrance, preservative, biocide, colorant, dye and rheology modifier.
WOOD TREATMENT SOLUTIONS CONTAINING FUNGICIDES AND TERTIARY ALKANOLAMINES AND RELATED METHODS, WOOD PRODUCTS AND COMPOSITION FOR PROTECTION AGAINST FUNGAL ORGANISMS
申请人:KOP-COAT, INC.
公开号:US20200107543A1
公开(公告)日:2020-04-09
The present invention provides a solution and related composition of matter and methods which synergistically improves a fungicide's effectiveness in resisting undesired fungal growth. The invention also provides wood and wood products which have been treated with the solution, method or compound.