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Bibliographic Details
Main Authors:	Kim, Kyung Rok, Bai, Yumo, Wang, Chonghuan, Chen, Guanting
Format:	Preprint
Published:	2025
Subjects:	Machine Learning
Online Access:	https://arxiv.org/abs/2506.04272
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What Matters in Data for DPO?
by: Pan, Yu, et al.
Published: (2025)

Choosing the Better Bandit Algorithm under Data Sharing: When Do A/B Experiments Work?
by: Li, Shuangning, et al.
Published: (2025)

Improving the Estimation of Lifetime Effects in A/B Testing via Treatment Locality
by: Chen, Shuze, et al.
Published: (2024)

Understanding Reference Policies in Direct Preference Optimization
by: Liu, Yixin, et al.
Published: (2024)

Length Desensitization in Direct Preference Optimization
by: Liu, Wei, et al.
Published: (2024)

Lightweight Robust Direct Preference Optimization
by: Kim, Cheol Woo, et al.
Published: (2025)

Disentangling Length from Quality in Direct Preference Optimization
by: Park, Ryan, et al.
Published: (2024)

Understand What LLM Needs: Dual Preference Alignment for Retrieval-Augmented Generation
by: Dong, Guanting, et al.
Published: (2024)

Adaptive Batch-Wise Sample Scheduling for Direct Preference Optimization
by: Huang, Zixuan, et al.
Published: (2025)

Preference Optimization with Multi-Sample Comparisons
by: Wang, Chaoqi, et al.
Published: (2024)

Distributed Direct Preference Optimization
by: Jiang, Zhanhong
Published: (2026)

ADPO: Anchored Direct Preference Optimization
by: Zixian, Wang
Published: (2025)

Importance Sampling for Multi-Negative Multimodal Direct Preference Optimization
by: Li, Xintong, et al.
Published: (2025)

ActiveDPO: Active Direct Preference Optimization for Sample-Efficient Alignment
by: Lin, Xiaoqiang, et al.
Published: (2025)

Towards Better Understanding of In-Context Learning Ability from In-Context Uncertainty Quantification
by: Liu, Shang, et al.
Published: (2024)

Direct Preference Optimization With Unobserved Preference Heterogeneity: The Necessity of Ternary Preferences
by: Chidambaram, Keertana, et al.
Published: (2024)

Gradient Imbalance in Direct Preference Optimization
by: Ma, Qinwei, et al.
Published: (2025)

Active Learning for Direct Preference Optimization
by: Kveton, Branislav, et al.
Published: (2025)

A Survey of Direct Preference Optimization
by: Liu, Shunyu, et al.
Published: (2025)

Orthogonal Finetuning for Direct Preference Optimization
by: Yang, Chenxu, et al.
Published: (2024)

Accelerating Direct Preference Optimization with Prefix Sharing
by: Wang, Franklin, et al.
Published: (2024)

Direct Preference Optimization for Adaptive Concept-based Explanations
by: Teneggi, Jacopo, et al.
Published: (2025)

SafeDPO: A Simple Approach to Direct Preference Optimization with Enhanced Safety
by: Kim, Geon-Hyeong, et al.
Published: (2025)

Preference as Reward, Maximum Preference Optimization with Importance Sampling
by: Jiang, Zaifan, et al.
Published: (2023)

Risk Profiling and Modulation for LLMs
by: Wang, Yikai, et al.
Published: (2025)

Continuous-Utility Direct Preference Optimization
by: Mohsin, Muhammad Ahmed, et al.
Published: (2026)

Filtered Direct Preference Optimization
by: Morimura, Tetsuro, et al.
Published: (2024)

Direct Preference Optimization with an Offset
by: Amini, Afra, et al.
Published: (2024)

Direct Preference Optimization-Enhanced Multi-Guided Diffusion Model for Traffic Scenario Generation
by: Yu, Seungjun, et al.
Published: (2025)

In-Context Curiosity: Distilling Exploration for Decision-Pretrained Transformers on Bandit Tasks
by: Yang, Huitao, et al.
Published: (2025)

Uncertainty-Penalized Direct Preference Optimization
by: Houliston, Sam, et al.
Published: (2024)

Direct Multi-Turn Preference Optimization for Language Agents
by: Shi, Wentao, et al.
Published: (2024)

Understanding the Training and Generalization of Pretrained Transformer for Sequential Decision Making
by: Wang, Hanzhao, et al.
Published: (2024)

Antigen-Specific Antibody Design via Direct Energy-based Preference Optimization
by: Zhou, Xiangxin, et al.
Published: (2024)

Calibrating conditional risk
by: Vasilyev, Andrey, et al.
Published: (2026)

Learning to Make Adherence-Aware Advice
by: Chen, Guanting, et al.
Published: (2023)

$β$-DPO: Direct Preference Optimization with Dynamic $β$
by: Wu, Junkang, et al.
Published: (2024)

Right Now, Wrong Then: Non-Stationary Direct Preference Optimization under Preference Drift
by: Son, Seongho, et al.
Published: (2024)

Aligning CodeLLMs with Direct Preference Optimization
by: Miao, Yibo, et al.
Published: (2024)

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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