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Ji Zhu

Researcher at University of Michigan

Publications -  748
Citations -  53702

Ji Zhu is an academic researcher from University of Michigan. The author has contributed to research in topics: Large Hadron Collider & Higgs boson. The author has an hindex of 93, co-authored 662 publications receiving 46627 citations. Previous affiliations of Ji Zhu include Northwestern University & Stanford University.

Papers
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Sparsity and smoothness via the fused lasso

TL;DR: The fused lasso is proposed, a generalization that is designed for problems with features that can be ordered in some meaningful way, and is especially useful when the number of features p is much greater than N, the sample size.
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Multi-class AdaBoost ∗

TL;DR: A new algorithm is proposed that naturally extends the original AdaBoost algorithm to the multiclass case without reducing it to multiple two-class problems and is extremely easy to implement and is highly competitive with the best currently available multi-class classification methods.
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Combined Measurement of the Higgs Boson Mass in pp Collisions at √s=7 and 8 TeV with the ATLAS and CMS Experiments

Georges Aad, +5120 more
TL;DR: A measurement of the Higgs boson mass is presented based on the combined data samples of the ATLAS and CMS experiments at the CERN LHC in the H→γγ and H→ZZ→4ℓ decay channels.
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Sparse permutation invariant covariance estimation

TL;DR: A method for constructing a sparse estimator for the inverse covariance (concentration) matrix in high-dimensional settings using a penalized normal likelihood approach and forces sparsity by using a lasso-type penalty is proposed.