公开(公告)号：US12272920B1

公开(公告)日：2025-04-08

申请号：US18973149

申请日：2024-12-09

Applicant: Beijing University of Technology

Inventor： Pingxue Li ,  Xuan Wang ,  Chuanfei Yao

IPC: H01S3/108 ,  H01S3/067 ,  H01S3/08 ,  H01S3/0941 ,  H01S3/1115 ,  H01S3/16 ,  H01S3/23

Abstract: A broadband laser system enhanced in the later part of mid infrared spectrum is provided, which can obtain a high power and wide spectrum laser output enhanced in the later part of mid infrared spectrum, and has the advantages of full fiber, compact structure and high ratio of power in the later part of mid infrared spectrum. It includes a mode-locked fiber laser, a pre amplifier, an optical fiber stretcher, an amplifier, a main amplifier, a first nonlinear optical fiber, a mid infrared amplifier and a second nonlinear optical fiber, which are connected in sequence, and each of them adopts a water cooling device or a thermo electric cooler, and is connected by optical fiber fusion.

公开(公告)号：US12093188B2

公开(公告)日：2024-09-17

申请号：US17719304

申请日：2022-04-12

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Juan Fang ,  Huijing Yang ,  Ziyi Teng ,  Min Cai ,  Xuan Wang

IPC: G06F12/12 ,  G06F9/30 ,  G06F9/38 ,  G06F9/50

CPC classification number: G06F12/12 ,  G06F9/30043 ,  G06F9/3816 ,  G06F9/5044

Abstract: The invention discloses a prefetch-adaptive intelligent cache replacement policy for high performance, in the presence of hardware prefetching, a prefetch request and a demand request are distinguished, a prefetch predictor based on an ISVM (Integer Support Vector Machine) is used for carrying out re-reference interval prediction on a cache line of prefetching access loading, and a demand predictor based on an ISVM is utilized to carry out re-reference interval prediction on a cache line of demand access loading. A PC of a current access load instruction and PCs of past load instructions in an access historical record are input, different ISVM predictors are designed for prefetch and demand requests, reuse prediction is performed on a loaded cache line by taking a request type as granularity, the accuracy of cache line reuse prediction in the presence of prefetching is improved, and performance benefits from hardware prefetching and cache replacement is better fused.

公开(公告)号：US20220374367A1

公开(公告)日：2022-11-24

申请号：US17719304

申请日：2022-04-12

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Juan Fang ,  Huijing Yang ,  Ziyi Teng ,  Min Cai ,  Xuan Wang

IPC: G06F12/12 ,  G06F9/30 ,  G06F9/38 ,  G06F9/50

Abstract: The invention discloses a prefetch-adaptive intelligent cache replacement policy for high performance, in the presence of hardware prefetching, a prefetch request and a demand request are distinguished, a prefetch predictor based on an ISVM (Integer Support Vector Machine) is used for carrying out re-reference interval prediction on a cache line of prefetching access loading, and a demand predictor based on an ISVM is utilized to carry out re-reference interval prediction on a cache line of demand access loading. A PC of a current access load instruction and PCs of past load instructions in an access historical record are input, different ISVM predictors are designed for prefetch and demand requests, reuse prediction is performed on a loaded cache line by taking a request type as granularity, the accuracy of cache line reuse prediction in the presence of prefetching is improved, and performance benefits from hardware prefetching and cache replacement is better fused.