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CorcPUM: Efficient Processing Using Cross-Point Memory via Cooperative Row-Column Access Pipelining and Adaptive Timing Optimization in Subarrays 23

CorcPUM: Efficient Processing Using Cross-Point Memory via C...

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Proceedings of the 60th Annual ACM/IEEE Design Automation Conference

作者： Chengning Wang Dan Feng Wei Tong Jingning Liu Wuhan National Laboratory for Optoelectronics Key Laboratory of Information Storage System Engineering Research Center of Data Storage Systems and Technology Ministry of Education of China (School of Computer Science and Technology Huazhong University of Science and Technology) Wuhan China

ISBN: (纸本)9798350323481

Emerging cross-point memory can in-situ perform vector-matrix multiplication (VMM) for energy-efficient scientific computation. However, parasitic-capacitance-induced row charging and discharging latency is a major performance bottleneck of subarray VMM. We propose a memory-timing-compliant bulk VMM processing-using-memory design with row access and column access co-optimization from rethinking of read access commands and μ-op timing. We propose row-level-parallelism-adaptive timing termination mechanism to reduce tail latency of tRCD and tRP by exploiting row nonlinear charging and bulk-interleaved row-column-cooperative VMM access mechanism to reduce tRAS and overlap CL without increasing column ADC precision. Evaluations show that our design can achieve 5.03× performance speedup compared with an aggressive baseline.

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New thermoelectric semiconductors Pb_(5)Sb_(12+x)Bi_(6-x)Se_(32) with ultralow thermal conductivity

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Chinese Journal of Structural Chemistry 2024年第3期43卷 33-40页

作者： Ruizhi Yang Xia Li Weiping Guo Zixuan Chen Hongwei Ming Zhong-Zhen Luo Zhigang Zou Key Laboratory of Advanced Materials Technologies International(Hong KongMacao and Taiwan)Joint Laboratory on Advanced Materials TechnologiesCollege of Materials Science and EngineeringFuzhou UniversityFuzhou350108China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhou350116China Eco-materials and Renewable Energy Research Center College of Engineering and Applied SciencesNanjing UniversityNanjing210093China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing210093China

Five new semiconductors Pb_(5)Sb_(12+x)Bi_(6-x)Se_(32)(x=0,1,2,3,and 4)have been synthesized for the first time,which adopt pavonite-type structure and crystallize in monoclinic C2/m space *** crystal structure is composed of two different types of polyhedral ***-I is a galena-like structure motif that forms with[MSe_(6)](M=Pb,Sb,and Bi)octahedra and slab-Ⅱcontains one octahedral[MSe_(6)]block and paired squared pyramids[MSe_(5)].Pb_(5)Sb_(12+x)Bi_(6-x)Se_(32)exhibits n-type semiconductor behaviors and the remarkable Seebeck coefficient from-64.1μV K^(-1)for x=0 sample to-242μV K^(-1)forx=4 sample at 300 ***,the Pb_(5)Sb_(12)Bi_(6)Se_(32)has the highest carrier concentration of 1.35×10^(20)cm^(-3)in pavonite-type *** complex compositions,mixed occupancies of the cations,and quasi-two-dimensional structure lead to the low lattice thermal conduc-tivity(κ_(lat))less than 0.48 W m^(-1)K^(-1)from 300 to 723 K,at which Pb_(5)Sb_(16)Bi_(2)Se_(32)especially shows the ultralow value of 0.25 W m^(-1)K^(-1).As a result,the thermoelectric figure of merit,ZT~0.34 at 723 K,is obtained for the intrinsic Pb_(5)Sb_(12)Bi_(6)Se_(32).

关键词： Thermoelectric Semiconductors Pavonite-type structure Pb_(5)Sb_(12+x)Bi_(6-x)Se_(32) Mixed occupancies Ultralow thermal conductivity

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Comparative Analysis of Various Models for Potato Leaf Disease Classification using Deep Learning 2

Comparative Analysis of Various Models for Potato Leaf Disea...

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2nd International Conference on Electronics and Renewable systems, ICEARS 2023

作者： Krishnakumar, B. Kousalya, K. Prakash, K.V. Indhu Ida, S. Jhansi Ravichandra, B. Rajeshkumar, G. Kongu Engineering College Dept of Cse Perundurai India R.M.K Engineering College Computer Science and Business Systems Kavaraipettai India Visakhapatnam India Bannari Amman Institute of Technology Department of Information Science and Engineering Sathyamangalam India

ISBN: (纸本)9798350346640

Potato is one among the most extensively consumed staple foods, ranking fourth on the global food pyramid. Moreover, because of the global coronavirus outbreak, global potato consumption is expanding dramatically. Potato diseases, on the other hand, are the primary cause of crop quality and quantity decline. Plant conditions will be dramatically worsened by incorrect disease classification and late identification. Fortunately, leaf conditions can help identify various illnesses in potato plants. Potato (Solanum tuberosum L) is one of the majorly farmed vegetable food crops in worldwide. The output of potato crops in both quality and quantity is affected majorly due to fungal blight infections, which causes a severe impact on the global food yield. The most severe foliar diseases for potato crops are early blight and late blight. The causes of these diseases are Alternaria solani and Phytophthora infestants respectively. Farmers suspect such problems by focusing on the color change or transformation in potato leaves, which is effortless due to subjectivity and lengthy time commitment. In such circumstances, it is critical to develop computer models that can diagnose those diseases quickly and accurately, even in their early stages. © 2023 IEEE.

关键词： Crops

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Logic Induced High-Order Reasoning Network for Event-Event Relation Extraction

arXiv

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arXiv 2024年

作者： Huang, Peixin Zhao, Xiang Hu, Minghao Tan, Zhen Xiao, Weidong National Key Laboratory of Information Systems Engineering National University of Defense Technology China Laboratory for Big Data and Decision National University of Defense Technology China Information Research Center of Military Science China

To understand a document with multiple events, event-event relation extraction (ERE) emerges as a crucial task, aiming to discern how natural events temporally or structurally associate with each other. To achieve this goal, our work addresses the problems of temporal event relation extraction (TRE) and subevent relation extraction (SRE). The latest methods for such problems have commonly built document-level event graphs for global reasoning across sentences. However, the edges between events are usually derived from external tools heuristically, which are not always reliable and may introduce noise. Moreover, they are not capable of preserving logical constraints among event relations, e.g., coreference constraint, symmetry constraint and conjunction constraint. These constraints guarantee coherence between different relation types, enabling the generation of a unified event evolution graph. In this work, we propose a novel method named LogicERE, which performs high-order event relation reasoning through modeling logic constraints. Specifically, different from conventional event graphs, we design a logic constraint induced graph (LCG) without any external tools. LCG involves event nodes where the interactions among them can model the coreference constraint, and event pairs nodes where the interactions among them can retain the symmetry constraint and conjunction constraint. Then we perform high-order reasoning on LCG with relational graph transformer to obtain enhanced event and event pair embeddings. Finally, we further incorporate logic constraint information via a joint logic learning module. Extensive experiments demonstrate the effectiveness of the proposed method with state-of-the-art performance on benchmark datasets. Copyright © 2024, The Authors. All rights reserved.

关键词： Constraint theory

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Air-Ground Physical Layer Security Transmission Scheme Assisted by Reconfigurable Intelligent Surfaces 3

Air-Ground Physical Layer Security Transmission Scheme Assis...

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3rd International Conference on Computing, Communication, Perception and Quantum technology, CCPQT 2024

作者： Li, Kaixuan Zhao, Xiao Yu, Kan Yuan, Wenli Liu, Xiaowu Feng, Zhiyong Li, Dong School of Computer Science Qufu Normal University Rizhao China School of Computer Science and Engineering Macau University of Science and Technology Taipa China Key Laboratory of Wave Scattering and Remote Sensing Information Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9798331528386

Unmanned aerial vehicles (UAVs) play a crucial role in wireless communication networks due to their mobility, line-of-sight (LoS) link, flexible, and on-demand deployment advantages. To address the challenge of secure air-to-ground transmission, this paper investigates a communication model where UAV is equipped with reconfigurable intelligent surfaces (RIS) to serve as relay. Specifically, the beamforming (BF), RIS phase shift and UAV flight trajectory are jointly optimized to maximize the average secrecy rate (ASR). Then, the non-convex problem is decomposed into three sub-problems and addressed using alternating optimization (AO) algorithm. The results of the simulations serve to confirm the efficacy of the proposal regarding the PLS scheme. © 2024 IEEE.

关键词： Unmanned aerial vehicles (UAV)

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Enhance Smart Grid Security With A Coordinated Cyber-Physical Defensive Mechanism 41

Enhance Smart Grid Security With A Coordinated Cyber-Physica...

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第41届中国控制会议

作者： Zhenyong Zhang Xin Che Xuguo Jiao Jingpei Wang State Key Laboratory of Public Big Data College of Computer Science and TechnologyGuizhou University College of Control Science and Engineering Zhejiang University School of Information and Control Engineering Qingdao University of Technology

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

Smart grid,as one of the largest evolutionary critical infrastructures,witnesses the deep integration of cyber technologies and physical ***,recent events show that the vulnerabilities exposed in the cyber side and the physical side can be exploited to cause coupled and severe ***,the adversaries are able to mask the pernicious physical attack using the cyber attack by compromising the digitized data transmitted to the control *** cooperative cyber-physical attack(CCPA) is stealthy to the current defense *** this article,we propose a cyber-physical defensive mechanism(CPDM) to thwart the *** changing the physical value of the line admittance,the model parameters known by the adversary are not useful anymore,which is the basic idea to design the *** implementation of CPDM depends on the deployment of the distributed flexible AC transmission system(D-FACTS).To reduce the infrastructure cost for the CPDM,we investigate the minimum number of required D-FACTS devices to thwart the *** consider both weak constraints on the CCPA and CPDM and practical limitations for the CCPA and *** each case,we propose a method to compute the optimal deployment of D-FACTS devices,that is,where the DFACTS device should be deployed.

关键词： CPA Enhance Smart Grid Security With A Coordinated Cyber-Physical Defensive Mechanism Security

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Multi-objective optimization of building design for life cycle cost and C0_(2) emissions:A case study of a low-energy residential building in a severe cold climate

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Building Simulation 2022年第1期15卷 83-98页

作者： Qingwen Xue Zhaojun Wang Qingyan Chen School of Architecture Harbin Institute of TechnologyHarbin150090China School of Mechanical Engineering Purdue UniversityWest LafayetteIN 47907USA Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology Ministry of Industry and Information TechnologyHarbin150090China

Currently,building construction and operation are responsible for 36%of global final energy usage and nearly 40%of energy-related carbon dioxide(CO_(2))*** the sustainable development perspective,it is crucial to consider the impact of construction material on the achievement of life cycle *** study proposed a simulation-based multi-objective optimization method to minimize both life cycle cost and CO_(2) emissions of *** built an energy simulation model with hybrid ventilation and light-dimming control in EnergyPlus based on an operational passive residential building in a severe cold ***,this investigation selected insulation thickness,window type,window-to-wall ratio,overhang depth and building orientation as design *** study ran parametric simulations to establish a database and then used artificial neural network models to correlate the design variables and the objective ***,we used the multi-objective optimization algorithm NSGA-Ⅱ to search for the optimal design *** results showed potential reductions of 10.9%-18.9%in life cycle cost and 13.5%-22.4%in life cycle CO_(2) emissions compared with the initial *** results indicated that the optimization approach in this study would improve building *** optimal values of the design variables obtained in this study can guide designers in meeting economic and environmental targets in passive buildings.

关键词： passive building artificial neural network life cycle CO_(2)emissions natural ventilation multi-criteria optimization

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Freshness-aware Incentive Mechanism for Mobile AI-Generated Content (AIGC) Networks

Freshness-aware Incentive Mechanism for Mobile AI-Generated ...

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2023 IEEE/CIC International Conference on Communications in China, ICCC 2023

作者： Wen, Jinbo Kang, Jiawen Xu, Minrui Du, Hongyang Xiong, Zehui Zhang, Yang Niyato, Dusit Guangdong University of Technology School of Automation China Nanyang Technological University School of Computer Science and Engineering Singapore Singapore University of Technology and Design Pillar of Information Systems Technology and Design Singapore Nanjing University of Aeronautics and Astronautics College of Computer Science and Technology China

ISBN: (纸本)9798350345384

Artificial Intelligence-Generated Content (AIGC) is a rapidly growing field that uses advanced AI algorithms to automatically generate, manipulate, and modify data to create diverse and valuable content. Recently, mobile AIGC networks have attracted significant attention. They integrate with mobile edge networks to provide customized and personalized AIGC services in real time. This is achieved by deploying AI algorithms on edge devices, particularly on Unmanned Aerial Vehicles (UAVs) with edge servers in a flexible and dynamic manner for ubiquitous edge intelligence. However, the wide deployment of UAV-enabled AIGC still faces critical challenges, such as issues with data freshness for AIGC fine-tuning and concerns around incentivizing fresh data sharing among UAVs under information asymmetry. In this paper, we first utilize Age of information (AoI) as a well-accepted data-freshness metric to quantify data freshness for AIGC fine-tuning. Then, we propose an AoI-based contract theory model to incentivize the contribution of fresh data among UAVs. Moreover, we design the optimal contract that is feasible to maximize the expected utility of the base station that is responsible for dispatching UAVs to collaboratively perform AIGC tasks. Finally, numerical results demonstrate the effectiveness of the proposed scheme in mobile AIGC networks. © 2023 IEEE.

关键词： Internet of things

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A Millimeter-Wave Wideband Miniaturized Metasurface Antenna Using Capacitive Loadings 16

A Millimeter-Wave Wideband Miniaturized Metasurface Antenna ...

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16th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies, UCMMT 2023

作者： Chen, Dongxu Yang, Wanchen Zhang, Wenhai Chen, Jiaqi Cao, Ning Hohai University College of Information Science and Engineering Nanjing210098 China South China University of Technology Guangdong Key Laboratory of Millimeter-Waves and Terahertz School of Electronic and Information Engineering Guangzhou510641 China Soochow University School of Electronic and Information Engineering Suzhou215000 China

ISBN: (纸本)9798350339406

In this work, a millimeter-wave wideband miniaturized metasurface (MS) antenna is firstly proposed for fifth-generation (5G) millimeter-wave applications. The proposed MS structure is constructed by loading several stacked patches underneath the conventional MS structure, where additional capacitances can be introduced. Accordingly, the resonance frequency can be decreased, and then the size can be miniaturized effectively. For demonstration, a millimeter-wave antenna is constructed by combining the proposed capacitive-loaded MS structure with a slot-coupled feeding structure. Simulations demonstrate that the constructed antenna can exhibit a wideband feature within a much compact aperture size of 0.28λ0×0.28λ0×0.09λ0, covering approximately 22% of the operating frequency range between 24.08~29.93 GHz. This design method offers a feasible solution for realizing compact wideband MS antennas for broadband wireless communication systems. © 2023 IEEE.

关键词： Millimeter waves

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The mass distribution of behind-armor debris generated during the normal penetration of an explosively formed projectile on rolled homogeneous armor steel 4

The mass distribution of behind-armor debris generated durin...

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4th International Conference on Defence technology, ICDT 2024

作者： Wei, Guoxu Guo, Rui Li, Xiangdong Zhang, Dongjiang Xu, Hongwei School of Mechanical Engineering Nanjing University of Science and Technology Nanjing210094 China National Key Laboratory of Land and Air Based Information Perception and Control Xi'an Modern Control Technology Research Institute Xi'an710065 China

To obtain the mass distribution law of behind-armor debris(BAD) produced by EFP vertically penetrating armored steel, the numerical simulation calculation of EFP vertically penetrating targets with different thicknesses (30mm~70mm) at different impact velocities (1600m/s~2000m/s) was carried out by using the numerical simulation method verified by experiments. Several classical natural fragment mass distribution models are used to study the mass distribution of the BAD generated by EFP and the target plate. The results show that the classical Mott formula is not suitable for describing the mass-quantity distribution of the BAD generated by warhead penetration, while the two-parameter Weibull distribution is a good fit for the mass distribution of the BAD, but both of them depend on the total number of fragments, and it is impossible to ensure that small debris is completely collected in the test. Therefore, it is often impossible to determine the total number of debris. In contrast, the Held distribution does not depend on the total number of debris, and the correlation coefficient of fitting results for the mass distribution of BAD is closest to 1, indicating that the Held distribution is the most suitable for describing the mass distribution of BAD. According to the variation of the characteristic parameter of Held distribution with the thickness of the target plate and EFP impact velocity, the mathematical expression between the characteristic parameter of Held formula and the dimensionless initial condition is established. Based on the Held distribution, a prediction model of the mass distribution of the BAD is established, which takes into account the impact velocity of EFP and the thickness of the target plate. The model estimation is in good agreement with the simulation results, which proves the accuracy of the established model. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Armor

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