Shrinkage methods have traditionally been applied in prediction problems. In this article we develop a shrinkage method (mean subset) that forms an average of regression coefficients from individual subsets of the explanatory variables. A Bayesian approach is taken to derive an expression of how the coefficient vectors from each subset should be weighted. It is not computationally feasible to calculate the mean subset coefficient vector for larger problems, and thus we suggest an algorithm to find an approximation to the mean subset coefficient vector. In a comprehensive Monte Carlo simulation study, it is found that the proposed mean subset method has superior prediction performance than prediction based on the best subset method, and in some settings also better than the ridge regression and lasso methods. The conclusions drawn from the Monte Carlo study is corroborated in an example in which prediction is made using spectroscopic data.
Targeted delivery of imaging probes for in vivo cellular imaging
申请人:Kao Joseph P. Y.
公开号:US10202342B2
公开(公告)日:2019-02-12
The present invention relates to nitroxide imaging probes that are isotopically modified or unmodified. Such nitroxide imaging probes may be included in liposomes that encapsulate self-quenching concentrations thereof, wherein the liposomes optionally comprise a targeting ligand specific to and having affinity for targeted tissue.
A composition for use in diagnostic and therapeutic applications includes a heteromultivalent nanoparticle having an outer surface and a plurality of targeting moieties conjugated to the surface of the nanoparticle, the targeting moieties includes a first activated platelet targeting moiety and a second activated platelet targeting moiety.
Compounds for targeting endothelial cells, compositions containing the same and methods for their use
申请人:——
公开号:US20020147136A1
公开(公告)日:2002-10-10
The present invention provides compounds for targeting endothelial cells, tumor cells or other cells that express the NP-1 receptor, compositions containing the same and methods for their use. Additionally, the present invention includes diagnostic, therapeutic and radiotherapeutic compositions useful for visualization, therapy or radiotherapy.