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Optimizing hardware-software co-design based on non-ideality in memristor crossbars for in-memory computing

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Science China(Information Sciences) 2025年

作者： Pinfeng JIANG Danzhe SONG Menghua HUANG Fan YANG Letian WANG Pan LIU Xiangshui MIAO xingsheng WANG School of Integrated Circuits Huazhong University of Science and Technology Hubei Yangtze Memory Labs

The memristor crossbar, with its exceptionally high storage density and parallelism, enables efficient vector matrix multiplication (VMM), significantly improving data throughput and computational efficiency. However, its analog computing is vulnerable to issues like IR-drop, device-to-device (D2D) variation, and stuck-at-fault (SAF), leading to a substantial decrease in the inference accuracy of neural networks deployed on crossbars. This work presents a hardware-software co-design approach tailored to deal with memristor crossbar non-ideality. We introduce an end-to-end functional array simulator (FAST) for precise and ultra fast end-to-end training, mapping, and evaluation of neural networks on the memristor crossbar. Utilizing the sparsity of the memristor crossbar coefficient matrix, it achieves simulation with low storage and computational resource requirements,dynamically selecting the optimal solution to complete the process. It can also precisely simulate the impact of non-ideal effects such as IR-drop, retention, variation, SAF, and AD/DA precision. Using FAST, we assess memristor crossbar matrix operations under non-ideal conditions, identifying the max throughput and the most energy-efficient crossbar configurations. Additionally,we propose a comparator-based activation function modulation (CAFM) scheme and its corresponding hardware architecture with programmable activation function circuits to address the IR-drop issue, enabling low power and area overheads, resulting in the recovery of neural network accuracy by 54%or more. This is validated within FAST, demonstrating the success of our hardware-software optimization co-design.

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对现行居住区规范中日照问题的几点探讨

规划师 2007年第B4期23卷 43-46页

作者：周星升王燕王艳济南市规划设计研究院规划设计所济南市规划设计研究院

近年来,居住区日照采光问题引发诸多争议,成为一个令政府管理部门、规划设计工作者、居民及房地产商都备感困惑的难题。解决居住区的日照采光问题,需统一国家规范和标准,制定适宜的地方详细技术规定,增强各类标准与规范的科学性、合理... 详细信息

近年来,居住区日照采光问题引发诸多争议,成为一个令政府管理部门、规划设计工作者、居民及房地产商都备感困惑的难题。解决居住区的日照采光问题,需统一国家规范和标准,制定适宜的地方详细技术规定,增强各类标准与规范的科学性、合理性和可操作性。

关键词：居件区日照采光规节标准

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济南商埠区更新发展思考

规划师 2007年第B4期23卷 64-66页

作者：姜连忠周星升陈洪金济南市规划局济南市规划设计研究院规划设计所济南市规划设计研究院

济南商埠区的建立,在济南城市社会发展史上具有划时代的意义。然而,随着社会、经济、文化等的发展,商埠区出现功能不齐备、结构不合理、风貌破坏严重、活力下降等问题,其生存和发展面临严峻挑战。应采取转换方式、激活功能、增强特色、... 详细信息

济南商埠区的建立,在济南城市社会发展史上具有划时代的意义。然而,随着社会、经济、文化等的发展,商埠区出现功能不齐备、结构不合理、风貌破坏严重、活力下降等问题,其生存和发展面临严峻挑战。应采取转换方式、激活功能、增强特色、提升品位等措施,促进商埠区的更新和改造。

关键词：济南商埠区历史街区保护与发展更新

Measuring visibility using digital photography

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Chinese Science Bulletin 1999年第12期44卷 1130-1134页

作者： xingsheng Xie Shanchang Tao Xiuji zhou Univ Sci & Technol China Hefei 230026 Peoples R China Chinese Acad Meteorol Sci Beijing 100081 Peoples R China

An automatic digital photography visibility system (DPVS) is presented, which can directly measure and monitor horizontal visibility during daytime through digital shooting. After shooting a scene of given black object and background via its CCD digital camera, the system can capture and transfer photographic images in the camera to a computer, as well as process the digital images and calculate the value of visibility. The formulas for calculating visibility with this method and analysing the effect of non-black object on measured results have also been derived . And then the comparison of DPVS observations with a Lidar-visibility measurements has been carried out. The results show that the average deviation and relative average deviation of visibility acquired by DPVS from lidar-visibility measurements are respectively within 0.927 km and 6.68%.

关键词： digital shooting image processing visibility comparing experiment.

Distributed Flexible Job-Shop Scheduling Problem Based on Hybrid Chemical Reaction Optimization Algorithm

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Complex System Modeling and Simulation 2022年第2期2卷 156-173页

作者： Jialei Li xingsheng Gu Yaya Zhang Xin zhou Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai 200237China

Economic globalization has transformed many manufacturing enterprises from a single-plant production mode to a multi-plant cooperative production *** distributed flexible job-shop scheduling problem(DFJSP)has become a research hot topic in the field of scheduling because its production is closer to *** research of DFJSP is of great significance to the organization and management of actual production *** solve the heterogeneous DFJSP with minimal completion time,a hybrid chemical reaction optimization(HCRO)algorithm is proposed in this ***,a novel encoding-decoding method for flexible manufacturing unit(FMU)is ***,half of initial populations are generated by scheduling *** with the new solution acceptance method of simulated annealing(SA)algorithm,an improved method of critical-FMU is designed to improve the global and local search ability of the ***,the elitist selection strategy and the orthogonal experimental method are introduced to the algorithm to improve the convergence speed and optimize the algorithm *** the experimental part,the effectiveness of the simulated annealing algorithm and the critical-FMU refinement methods is firstly ***,in the comparison with other existing algorithms,the proposed optimal scheduling algorithm is not only effective in homogeneous FMUs examples,but also superior to existing algorithms in heterogeneous FMUs arithmetic cases.

关键词： scheduling problem distributed flexible job-shop chemical reaction optimization algorithm heterogeneous factory simulated annealing algorithm

Monitoring rock desert formation caused by two different origins(ice-snow melting and drying)in the Qinghai-Tibet Plateau of China by considering topographic and meteorological elements

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Journal of Arid Land 2022年第8期14卷 849-866页

作者： JIA Wei SHI Peijun WANG Jing'ai MA Weidong XIA xingsheng zhou Yuantao Key Laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation(Ministry of Education) Qinghai Normal UniversityXining 810008China School of Geographical Sciences Qinghai Normal UniversityXining 810008China Academy of Plateau Science and Sustainability Qinghai Normal UniversityXining 810008China Key Laboratory of Environmental Change and Natural Disaster Ministry of EducationBeijing Normal UniversityBeijing 100875China Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China

Monitoring rock desert formation caused by two different origins(ice-snow melting and drying)through remote sensing is crucial to our understanding of the interaction between the underlying surface of different rock desert and land-atmosphere types,as well as the relationship between bare land and soil erosion.A number of achievements have been made in remote sensing monitoring of desert areas,but there is a lack of accurate classification and remote sensing identification of rock desert types based on formation *** this study,the north and south sides of the eastern Kunlun Mountains in the northern part of the Qinghai-Tibet Plateau of China were taken as the study *** operational landscape imager,digital elevation model,and precipitation and temperature grid data were used as data *** identifying the bare areas based on the normalized difference vegetation index(NDVI),we used the multi-element fusion method of contours,isotherms,and isohyets to identify the rock desert types in the ice-snow melting and dry *** results showed that:(1)the rock desert areas identified by remote sensing based on topographic and meteorological elements were highly accurate,with an overall accuracy of 88.45%and kappa coefficient of *** multi-element fusion method of contours,isotherms,and isohyets could effectively identify the rock desert types in the ice-snow melting and dry areas;(2)the optimal segmentation range of the ice-snow melting and dry areas was 3600 m contour,-2°C-2°C isotherms,and 100-130 mm *** areas with elevation less than 3600 m,annual average temperature higher than 2°C,and average annual precipitation less than 100 mm were rock desert in the dry *** range of-2°C-2°C isotherms and 100-130 mm isohyets was the transition area between the ice-snow melting and dry *** areas with elevation higher than 3600 m,annual average temperature less than-2°C,and average annual precipitation higher than 130 mm were rock desert

关键词： rock desert in the ice-snow melting areas rock desert in the dry areas contours isotherms isohyets Qinghai-Tibet Plateau

Distributed process monitoring based on Kantorovich distancemultiblock variational autoencoder and Bayesian inference

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Chinese Journal of Chemical Engineering 2024年第9期73卷 311-323页

作者： Zongyu Yao Qingchao Jiang xingsheng Gu Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai 200237China

Modern industrial processes are typically characterized by large-scale and intricate internal ***,the distributed modeling process monitoring method is effective.A novel distributed monitoring scheme utilizing the Kantorovich distance-multiblock variational autoencoder(KD-MBVAE)is ***,given the high consistency of relevant variables within each sub-block during the change process,the variables exhibiting analogous statistical features are grouped into identical segments according to the optimal quality transfer ***,the variational autoencoder(VAE)model was separately established,and corresponding T^(2)statistics were *** improve fault sensitivity further,a novel statistic,derived from Kantorovich distance,is introduced by analyzing model residuals from the perspective of probability *** thresholds of both statistics were determined by kernel density ***,monitoring results for both types of statistics within all blocks are amalgamated using Bayesian ***,a novel approach for fault diagnosis is *** feasibility and efficiency of the introduced scheme are verified through two cases.

关键词： Chemical processes Safety Kantorovich distance Neural networks Process monitoring Bayesian inference

Total least-squares EIO model,algorithms and applications

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Geodesy and Geodynamics 2019年第1期10卷 17-25页

作者： xingsheng Deng Ge Liu Tao zhou Sichun Peng School of Traffic and Transportation Engineering Changsha University of Science & Technology

A functional model named EIO(Errors-In-Observations) is proposed for general TLS(total least-squares)adjustment. The EIO model only considers the correction of the observation vector, but doesn't consider to correct all elements in the design matrix as the EIV(Errors-In-Variables) model does, furthermore, the dimension of cofactor matrix is much smaller. Iterative algorithms for the parameter estimation and their precise covariance matrix are derived rigorously, and the computation steps are also presented. The proposed approach considers the correction of the observations in the coefficient matrix, and ensures their agreements in every matrix elements. Parameters and corrections can be solved at the same *** approximate solution and a precise solution of the covariance matrix can be achieved by corresponding algorithms. Applications of EIO model and the proposed algorithms are demonstrated with several examples. The results and comparative studies show that the proposed EIO model and algorithms are feasible and reliable for general adjustment problems.

关键词： Errors-In-Variables Errors-In-Observations Weighted total least square Parameter estimation Iterative covariance solution

The research and progress of micro-fabrication technologies of two-dimensional photonic crystal

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Chinese Science Bulletin 2007年第7期52卷 865-876页

作者： XU xingsheng ZHANG DaoZhong State Key Laboratory of Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China Key Laboratory of Optical Physics Institute of Physics Chinese Academy of Sciences Beijing 100083 China

The novel material of photonic crystal makes it possible to control a photon, and the photonic integration will have breakthrough progress due to the application of photonic crystal. It is based on the photonic crystal device that the photonic crystal integration could be realized. Therefore, we should first investigate photonic crystal devices based on the active and the passive semiconductor materials, which may have great potential application in photonic integration. The most practical and important method to fabricate two-dimensional photonic crystal is the micro-manufacture method. In this paper, we summarize and evaluate the fabrication methods of two-dimensional photonic crystal in near-infrared region, including electron beam lithography, selection of mask, dry etching, and some works of ours. This will be beneficial to the study of the photonic crystal in China.

关键词：二维光子晶体微细加工方法研究进展掩模电子束平版印刷术干性蚀刻