检索结果-内蒙古大学图书馆

Multimodal contrastive learning for radiology report generation

Journal of Ambient Intelligence and Humanized Computing 2023年第8期14卷 11185-11194页

作者： Wu, Xing Li, Jingwen Wang, Jianjia Qian, Quan School of Computer Engineering and Science Shanghai University Shanghai200444 China Shanghai Institute for Advanced Communication and Data Science Shanghai University Shanghai200444 China

Automated radiology report generation can not only lighten the workload of clinicians but also improve the efficiency of disease diagnosis. However, it is a challenging task to generate semantically coherent radiology reports that are also highly consistent with medical images. To meet the challenge, we propose a Multimodal Recursive model with Contrastive Learning (MRCL). The proposed MRCL method incorporates both visual and semantic features to generate "Impression" and "Findings" of radiology reports through a recursive network, in which a contrastive pre-training method is proposed to improve the expressiveness of both visual and textual representations. Extensive experiments and analyses prove the efficacy of the proposed MRCL, which can not only generate semantically coherent radiology reports but also outperform state-of-the-art methods. © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Semantics

来源：评论

学校读者我要写书评

暂无评论

引用

science China(Information sciences) 2018年第3期61卷 131-147页

作者： Sen XU Xiangjun LU Kaiyu ZHANG Yang LI Lei WANG Weijia WANG Haihua GU Zheng GUO Junrong LIU Dawu GU Department of Computer Science and Engineering Shanghai Jiao Tong University College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Wanda Internet Technology Group Shanghai Institute for Advanced Communication and Data Science

A template attack, the most powerful side-channel attack methods, usually first builds the leakage profiles from a controlled profiling device, and then uses these profiles to recover the secret of the target device. It is based on the fact that the profiling device shares similar leakage characteristics with the target device. In this study, we focus on the similar operations in a single device and propose a new variant of the template attack, called the similar operation template attack(SOTA). SOTA builds the models on public variables(e.g., input/output) and recovers the values of the secret variables that leak similar to the public variables. SOTA's advantage is that it can avoid the requirement of an additional profiling device. In this study, the proposed SOTA method is applied to a straightforward RSA-CRT implementation. Because the leakage is(almost) the same in similar operations, we reduce the security of RSA-CRT to a hidden multiplier problem(HMP) over GF(q), which can be solved byte-wise using our proposed heuristic algorithm. The effectiveness of our proposed method is verified as an entire prime recovery procedure in a practical leakage scenario.

关键词： side channel attack template attack RSA-CRT hidden number problem prime recovery

来源：评论

学校读者我要写书评

暂无评论

Differential-Trust-Mechanism Based Trade-off Method Between Privacy and Accuracy in Recommender Systems

引用

IEEE Transactions on Information Forensics and Security 2025年 20卷 5054-5068页

作者： Xu, Guangquan Feng, Shicheng Xi, Hao Yan, Qingyang Li, Wenshan Wang, Cong Wang, Wei Liu, Shaoying Tian, Zhihong Zheng, Xi Qingdao Huanghai University School of Big Data Qingdao China Tianjin University College of Intelligence and Computing Tianjin300350 China KLISS and School of Software Beijing100084 China Sichuan University School of Cyber Science and Engineering Chengdu610207 China Xi’an Jiaotong University School of Cyber Science and Engineering Xi’an710049 China East China Normal University Shanghai200062 China Hiroshima University School of Informatics and Data Science Higashihiroshima739-8511 Japan Guangzhou University Cyberspace Institute of Advanced Technology Guangdong Key Laboratory of Industrial Control System Security Huangpu Research School of Guangzhou University China Macquarie University School of Computing SydneyNSW2109 Australia

In the era where Web3.0 values data security and privacy, adopting groundbreaking methods to enhance privacy in recommender systems is crucial. Recommender systems need to balance privacy and accuracy, while also having the ability to overcome cold start problems. The Differential Trust Mechanism (DTM) introduced in this paper is such an approach. The DTM provides a unique use of Gaussian distributions in modeling trust relationships within data, offering a novel way to balance recommendation accuracy with user privacy. This mechanism innovatively applies differential privacy principles, using Gaussian noise addition to protect individual user data from inference attacks, while maintaining the integrity and utility of the overall dataset. Unlike traditional anonymization techniques that often compromise data utility or vulnerability to reverse engineering, DTM provides a robust solution by dynamically adjusting privacy levels based on the trustworthiness of data requests. By combining DTM with existing mainstream recommendation algorithms, the prediction accuracy of MAE and RMSE increases by at least 6.60% and 2.69%, respectively. This dual benefit positions DTM as a significant advancement in secure data processing, especially relevant for online businesses and platforms where personalized recommendations are crucial yet privacy concerns are paramount. © 2005-2012 IEEE.

关键词： Sensitive data

来源：评论

学校读者我要写书评

暂无评论

Spectrally efficient single carrier 400G optical signal transmission

引用

Frontiers of Optoelectronics 2019年第1期12卷 15-23页

作者： Jianjun YU Shanghai Institute for Advanced Communication and Data Science Key Laboratory for Information Science of Electromagnetic Waves(MoE)Fudan UniversityShanghai 200433China

In this paper,the recent progress on spectrally efficient single carrier(SC)400G optical signal transmission was *** using quadrature phase shift keying(QPSK),16 quadrature amplitude modulation(16QAM)and 64QAM,we can realize transmission distance over 10000,6000 and 3000 km,respectively,with large area fiber and all-Raman *** improve the system performance and generate high-order QAM,advanced digital signal processing algorithms such as probabilistic shaping and look-up table pre-distortion are employed to improve the transmission performance.

关键词： coherent detection digital signal processing single carrier (SC) probabilistic shaping OFDM

来源：评论

学校读者我要写书评

暂无评论

Broadband multi-channel OAM mode generator based on helical long-period gratings inscribed in seven-core fibers

引用

Optics and Laser Technology 2025年 189卷

作者： Chen, Siyu Jiang, Chen Ma, Yuehui Fan, Xiaolong Zhao, Yunhe Mou, Chengbo Liu, Yunqi Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication Shanghai Institute for Advanced Communication and Data Science Shanghai University Shanghai200444 China Nanjing University of Posts and Telecommunications Nanjing210023 China Institute of Logistics Science and Engineering Shanghai Maritime University Shanghai201306 China

Orbital angular momentum (OAM) plays a significant role in optical communications, optical tweezers, and sensing applications. A single-channel OAM mode cannot satisfy the increasing application demands. Developing a multi-channel OAM mode is challenging. We demonstrate a broadband multi-channel OAM mode converter implemented with a Mach-Zehnder interferometer (MZI) mode coupler based on seven-core fiber helical long-period gratings (SCF-HLPGs). Seven spatial channels are achieved for parallel OAM excitation using the HLPGs inscribed in the SCF. Meanwhile, multi-wavelength channels are generated by the interference dips within the MZI configuration, enabling mode conversion from the LP01 mode to the LP11 mode and ± 1 order OAM modes across a total of 147 channels, with a conversion efficiency exceeding 90 % and covering the entire C + L band. The proposed multi-channel OAM mode generator demonstrates significant potential for applications in space division multiplexing, wavelength division multiplexing systems, and optical fiber sensing. © 2025 Elsevier Ltd

关键词： Mach-Zehnder interferometers

来源：评论

学校读者我要写书评

暂无评论

Controllable high-order LP mode-locked fiber laser based on superimposed acoustically induced fiber gratings

引用

Optics and Laser Technology 2025年 190卷

作者： Han, Tao Zhang, Zhengwei Lu, Jiafeng Xu, Jiangtao Li, Xiang Pang, Fufei Zeng, Xianglong Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication Shanghai Institute for Advanced Communication and Data Science Shanghai University Shanghai200444 China

High-order modes exhibit intricate spatial oscillations, which facilitate more uniform and stable energy distribution within the laser cavity. In particular, high-order linearly polarized (LP) modes that demonstrate superior performance compared to random or nonlinearly polarized modes effectively mitigate mode competition and suppress noise interference. This leads to significant enhancement in both the stability and efficiency of laser output. Here, this study demonstrates, for the first time, the application of superimposed acoustically induced fiber gratings (SAIFGs) to generate higher-order LP-modes other than LP11, LP21 and LP02, such as LP31 and LP12. Over a wide dynamic range of wavelengths, the mode converter maintains excellent tunability, with the modes presenting high purity. Under dual-resonant response, LP-modes exhibit orthogonal characteristics. Furthermore, during frequency tuning between two orthogonal LP-modes, the evolution of LP-mode component weights in the hybrid modes is analyzed by using the deep learning-based stochastic parallel gradient descent (SPGD) algorithm, which enables precise control of the mode composition. In high-energy Yb-doped fiber lasers, high-order LP-modes output can be achieved, and the temporal evolution of the pulse exhibits characteristics consistent with dissipative soliton dynamics. Additionally, we observed the hybrid modes (comprising LP01 and LP11 components) at the few-mode fiber (FMF) end, where each component maintains the mode-locked (ML) state. © 2025

关键词： Solitons

来源：评论

学校读者我要写书评

暂无评论

Explosive synchronization of multi-layer complex networks based on star connection between layers with delay

引用

Chinese Physics B 2023年第10期32卷 343-349页

作者：金彦亮韩钱源郭润珠高塬沈礼权 Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced CommunicationShanghai Institute for Advanced Communication and Data ScienceShanghai UniversityShanghai 200072China School of Communication and Information Engineering Shanghai UniversityShanghai 200000China

Explosive synchronization(ES)is a kind of first-order jump phenomenon that exists in physical and biological *** recent years,researchers have focused on ES between single-layer and multi-layer *** research on complex networks with delay has focused on single-layer or double-layer networks,multi-layer networks are seldom *** this paper,we propose a Kuramoto model of frequency weights in multi-layer complex networks with delay and star connections between *** theoretical analysis and numerical verification,the factors affecting the backward critical coupling strength are *** results show that the interaction between layers and the average node degree has a direct effect on the backward critical coupling strength of each layer *** location of the delay,the size of the delay,the number of network layers,the number of nodes,and the network topology are revealed to have no direct impact on the backward critical coupling strength of the *** is introduced to explore the influence of delay and other related parameters on ES.

关键词： multi-layer networks Kuramoto model explosive synchronization delay

来源：评论

学校读者我要写书评

暂无评论

Locally repairable codes from combinatorial designs

引用

science China(Information sciences) 2020年第2期63卷 174-188页

作者： Yu ZHANG Haibin KAN Shanghai Key Laboratory of Intelligent Information Processing School of Computer ScienceFudan University Fudan-Zhongan Joint Laboratory of Blockchain and Information Security Shanghai Engineering Research Center of Blockchain Shanghai Institute for Advanced Communication and Data Science

Locally repairable codes（LRCs） were proposed to reduce the repair degree in distributed storage systems. In particular, LRCs with availability are highly desirable for distributed storage systems, since this kind of codes provide the mechanism of local repair for code symbols and parallel reading of hot *** this paper, we propose four types of（n, k, r, t）;LRCs from combinatorial designs. We introduce several constructions of LRCs with strict availability and some constructions of distance-optimal LRCs with information-symbol locality. Most of our constructions in this paper are over F;, i.e., they are suitable for implementation.

关键词： locally repairable codes erasure codes combinatorial designs distributed storage systems codes with availability

来源：评论

学校读者我要写书评

暂无评论

Explosive synchronization of multi-layer complex networks based on inter-layer star network connection

引用

Chinese Physics B 2021年第12期30卷 264-270页

作者： Yan-Liang Jin Run-Zhu Guo Xiao-Qi Yu Li-Quan Shen Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced CommunicationShanghai Institute for Advanced Communication and Data ScienceShanghai UniversityShanghai 200072China School of Communication and Information Engineering(SCIE) Shanghai UniversityShanghai 200000China

Explosive synchronization(ES)is a first-order transition phenomenon that is ubiquitous in various physical and biological *** recent years,researchers have focused on explosive synchronization in a single-layer network,but few in multi-layer *** paper proposes a frequency-weighted Kuramoto model in multi-layer complex networks with star connection between layers and analyzes the factors affecting the backward critical coupling strength by both theoretical analysis and numerical *** results show that the backward critical coupling strength of each layer network is influenced by the inter-layer interaction strength and the average *** number of network layers,the number of nodes,and the network topology can not directly affect the synchronization of the *** the inter-layer interaction strength can prevent the emergence of explosive synchronization and increasing the average degree can promote the generation of explosive synchronization.

关键词： explosive synchronization Kuramoto model multi-layer networks

来源：评论

学校读者我要写书评

暂无评论

Self-resonant Coil with High-order Compensation Characteristics

引用

IEEE Transactions on Power Electronics 2025年

作者： Yi, Zixuan Zhang, Qingfei Li, Shuang Yang, Xue-Xia Zeng, Dan Li, Meiling Shanghai University School of Communication and Information Engineering Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication Shanghai Institute for Advanced Communication and Data Science Key laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai China Shanghai Jiao Tong University University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai200240 China

Self-resonant (SR) coils replace lumped with distributed compensation components, enabling efficient power transfer and high integration. However, current SR coils function merely as series (S) or parallel (P) resonant tanks, thereby supporting merely four low-order compensation networks: SS, SP, PS, and PP. High-order compensation networks have demonstrated superiority over low-order counterparts, providing enhanced safety, stability, and design flexibility. Unfortunately, no SR coil currently with high-order compensation network characteristics. This paper proposes a novel SR coil with LCC compensation characteristics that integrates the required compensation components in the form of distributed structures with the main coil on a single substrate, eliminating lumped components. To verify feasibility, a pair of SR coils, incorporating a normal SR coil, are fabricated, which constitute a SR coil inductive power transfer (IPT) system with LCC-S compensation characteristics. Different with traditional LCC-S systems, the compensation inductor in the proposed SR coil participates in power transfer. Therefore, corresponding formulas for the resonant frequency, AC-AC power transfer efficiency (PTE), output voltages and power are provided. Favorablely, the proposed IPT system exhibits three advantages: a constant voltage output independent of the AC load, high AC-AC PTE over a wide range of AC load values, independence of resonant frequency from coupling coefficients, and no damage to the front-end power source during no-load operation. Experimental results demonstrate a coil-to-coil PTE of 93.2% and DC-DC efficiency of 80.5% over a 35 mm spacing gap. In addition, a LED monitor is successfully powered, indicating its potential for application in electronic devices, such as mobile phones and laptops. © 1986-2012 IEEE.

关键词： Electric coils

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：