Search Results for author: Ke Zhu

Found 14 papers, 3 papers with code

Estimation for conditional moment models based on martingale difference divergence

no code implementations17 Apr 2024 Kunyang Song, Feiyu Jiang, Ke Zhu

To overcome this identification issue, we further provide a two-step estimation procedure for the model with intercept parameters.

Time Series

Self-Supervised Visual Preference Alignment

1 code implementation16 Apr 2024 Ke Zhu, Liang Zhao, Zheng Ge, Xiangyu Zhang

We generate chosen and rejected responses with regard to the original and augmented image pairs, and conduct preference alignment with direct preference optimization.

8k Visual Question Answering

Low-rank Attention Side-Tuning for Parameter-Efficient Fine-Tuning

no code implementations6 Feb 2024 Ningyuan Tang, Minghao Fu, Ke Zhu, Jianxin Wu

Because learnable parameters from these methods are entangled with the pretrained model, gradients related to the frozen pretrained model's parameters have to be computed and stored during finetuning.

Rectify the Regression Bias in Long-Tailed Object Detection

no code implementations29 Jan 2024 Ke Zhu, Minghao Fu, Jie Shao, Tianyu Liu, Jianxin Wu

While existing methods fail to handle the regression bias, the class-specific regression head for rare classes is hypothesized to be the main cause of it in this paper.

Long-tailed Object Detection Object +3

DTL: Disentangled Transfer Learning for Visual Recognition

1 code implementation13 Dec 2023 Minghao Fu, Ke Zhu, Jianxin Wu

When pre-trained models become rapidly larger, the cost of fine-tuning on downstream tasks steadily increases, too.

Transfer Learning

Multi-Label Self-Supervised Learning with Scene Images

no code implementations ICCV 2023 Ke Zhu, Minghao Fu, Jianxin Wu

Self-supervised learning (SSL) methods targeting scene images have seen a rapid growth recently, and they mostly rely on either a dedicated dense matching mechanism or a costly unsupervised object discovery module.

Contrastive Learning Multi-Label Classification +2

Quantized Feature Distillation for Network Quantization

no code implementations20 Jul 2023 Ke Zhu, Yin-Yin He, Jianxin Wu

QFD first trains a quantized (or binarized) representation as the teacher, then quantize the network using knowledge distillation (KD).

Image Classification Image Segmentation +6

Instance-based Max-margin for Practical Few-shot Recognition

no code implementations27 May 2023 Minghao Fu, Ke Zhu, Jianxin Wu

With both the new pFSL setting and novel IbM2 method, this paper shows that practical few-shot learning is both viable and promising.

Few-Shot Learning

Big portfolio selection by graph-based conditional moments method

no code implementations27 Jan 2023 Zhoufan Zhu, Ningning Zhang, Ke Zhu

Next, the GRACE method learns the conditional variance, skewness, and kurtosis of stock returns from the learned conditional quantiles by using the quantiled conditional moment (QCM) method.

Statistical inference for the logarithmic spatial heteroskedasticity model with exogenous variables

no code implementations17 Jan 2023 Bing Su, Fukang Zhu, Ke Zhu

For the log-SHE model, its spatial near-epoch dependence (NED) property is investigated, and a systematic statistical inference procedure is provided, including the maximum likelihood and generalized method of moments estimators, the Wald, Lagrange multiplier and likelihood-ratio-type D tests for model parameter constraints, and the overidentification test for the model diagnostic checking.

Path-specific Effects Based on Information Accounts of Causality

no code implementations6 Jun 2021 Heyang Gong, Ke Zhu

Path-specific effects in mediation analysis provide a useful tool for fairness analysis, which is mostly based on nested counterfactuals.

Fairness

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