Qi Chen

In proof-of-stake blockchains based on State Machine Replication (SMR), the order of transactions directly affects client-visible financial outcomes. _Ordered consensus_ augments the SMR specification by imposing correctness conditions on transaction ordering, with a focus on limiting Byzantine i...

As numerous instruction-tuning datasets continue to emerge, dynamically balancing and optimizing their mixtures has become a criticalchallenge. To address this, we propose DynamixSFT, a dynamic and automated method for instruction-tuning dataset mixture optimization. We formulate the problem as a...

Large-scale retrieval systems must operate under strict latency constraints while maintaining high recall. Sparse retrieval offers efficiency and interpretability, whereas dense retrieval provides stronger semantic matching. Although hybrid approaches combine both signals, their interaction is of...