检索结果-内蒙古大学图书馆

International Conference on Application Specific systems (ASAP), architectures and Processors

作者： Haohuan Fu Jingheng Xu Lin Gan Chao Yang Wei Xue Wenlai Zhao Wen Shi Xinliang Wang Guangwen Yang National Supercomputing Center in Wuxi Ministry of Education Key Lab. for Earth System Modeling Center for Earth System Science Tsinghua University Department of Computer Science & Technology Tsinghua University Institute of Software and State Key Laboratory of Computer Science Chinese Academy of Sciences Tsinghua University Beijing Beijing CN

ISBN: (纸本)9781509015047

As a traditional application on various supercomputers, atmospheric modeling has long been suffering from the low performance efficiency. In this paper, we pick the 3D Euler equation solver (the most essential dynamic component for a non-hydrostatic atmospheric model) as the target application, and explore the maximum performance efficiency that can be achieved on CPU-GPU hybrid architectures. Besides presenting the suitable hybrid domain decomposition methodology and taking proper usage of tuning techniques for both the CPU and GPU parts, we further propose a novel GPU tuning technique, namely the customizable data caching mechanism with thread warp rescheduling scheme, which is specifically designed for the Euler solver. Combining all the optimizing approaches together, remarkable performance boost has been achieved on mainstream GPU architectures including Tesla Fermi C2050, K20×, K40 and K80. Especially, on the latest Tesla K80, we demonstrate a 31.64× speedup over the performance of 12-core E5-2697 CPU. In addition, based on a hybrid CPU-GPU node with two 12-core E5-2697 CPUs and two Tesla K80 GPUs, a sustained double-precision performance of 1.04 Tflops (16% of the peak) is achieved, which is remarkably higher than the efficiency of similar optimizing tasks based on heterogeneous platforms (strictly less than 10%, as demonstrated in the related work). In addition, a nearly linear weak scaling efficiency is achieved which demonstrate the effectiveness of our domain decomposition method.

关键词： Atmospheric modeling Graphics processing units Mathematical model Computational modeling computer architecture Tuning Three-dimensional displays

来源：评论

学校读者我要写书评

暂无评论

NiuEM: A Nested-iterative Unsupervised Learning Model for Single-particle Cryo-EM Image Processing

NiuEM: A Nested-iterative Unsupervised Learning Model for Si...

引用

2020 IEEE International Conference on Bioinformatics and Biomedicine, BIBM 2020

作者： Hu, Rui Cai, Jiaming Zheng, Wangjie Yang, Yang Shen, Hong-Bin Shanghai Jiao Tong University Key Lab. of Shanghai Education Commission for Intelligent Interaction and Cognitive Engineering Department of Computer Science and Engineering Shanghai200240 China Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai200240 China Shanghai Jiao Tong University Department of Bioinformatics and Biostatistics Shanghai200240 China

ISBN: (纸本)9781728162157

Cryo-electron microscopy (cryo-EM) has become a mainstream technology for solving spatial structures of biomacromolecules, while the processing of cryo-EM images is a very challenging task. One of the great challenges is the high noise in the images. A common method is to cluster the images with close projecting angles to get mean images, which are used for 3D reconstruction. However, due to the extremely low signal-to-noise-ratio, common clustering methods often fail to obtain high-quality mean images, leading to poorly reconstructed structures. In this study, we present a new unsupervised learning framework, called NiuEM, to discriminate images captured from different angles and yield cluster-mean images. NiuEM first generates pseudo-lab.ls and then exploits both contrastive loss and cross-entropy loss for training convolutional layers to learn feature representations. Moreover, the pseudo-lab.ls are updated iteratively to enhance the reliability of lab.ls. We assess the performance of NiuEM on four data sets via both visualized and quantitative experiments. Especially, two kinds of metrics are adopted to measure the performance, regarding the clustering quality and the resolution of reconstructed 3D models, respectively. The experimental results show that NiuEM achieves very competitive clustering accuracy in the comparison with the state-of-the-art image clustering methods. Moreover, the cluster mean images yielded by NiuEM lead to better initial 3D models compared with the mainstream reconstruction tools. © 2020 IEEE.

关键词： Image reconstruction

来源：评论

学校读者我要写书评

暂无评论

Optimal ramped-gate soft programming of over-erased flash EEPROM cells at given current

Optimal ramped-gate soft programming of over-erased flash EE...

引用

2004 7th International Conference on Solid-State and Integrated Circuits Technology Proceedings, ICSICT 2004

作者： Quan, Wu-Yun Baek, Chang-Ki Kim, Dae M. Gang, Ruan Huang, Yiping ASIC and System State-Key Research Lab. Department of Microelectronics Fudan University 220 Handan-road 200433 Shanghai China School of Electrical Engineering and Computer Science ISRC Seoul National University Kwanak P.O. Box 34 Seoul 151-744 Korea Republic of Korea Institute for Advanced Study 207-43 Cheongryangri Seoul Korea Republic of

Presented herein is an efficient simulation technique enabling systematic investigation of the soft programming over-erased flash EEPROM cells. The simulation provides a method by which to find the optimal soft programming technique for given current. The method requires only the cell performance data and allows investigation of the soft programming under various bias conditions. In principle, the methodology can also be used to investigate the programming and erase operations. © 2004 IEEE.

关键词： Flash memory

来源：评论

学校读者我要写书评

暂无评论

Collosion detection research based on capsule bounding volume

引用

Journal of Computational Information systems 2014年第7期10卷 2743-2750页

作者： Kong, Dehan Liu, Yongshan Cui, Na Department of Information Science and Engineering Yanshan University Qinhuangdao 066004 China The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province Qinhuangdao 066004 China The Data Industry Research Lab. Qinhuangdao 066004 China

A collision detection algorithm based on capsule bounding volume (CBV for short) is presented improve the efficiency of Collision detection in three-dimensional scene. This algorithm use CBV to encircle roles and achieve collision detection between the virtual characters and static objects and dynamic objects in the scene. It includes collision detection between CBV and AABB, triangular and capsule. Theoretical analysis and experimental results show that this algorithm can improve real time for collision detection. © 2014 Binary Information Press.

关键词： Information systems

来源：评论

学校读者我要写书评

暂无评论

Design of A Hybrid Power Modulation PSS for Doubly-fed Induction Generator

Design of A Hybrid Power Modulation PSS for Doubly-fed Induc...

引用

IEEE Power and Energy Society General Meeting

作者： Lixin Wang Yuanzhang Sun Lin Cheng Ian A. Hiskens State Key Lab. of Power System Dept. of Electrical Engineering Tsinghua University Beijing China Dept. of Electrical Engineering and Computer Science University of Michigan Ann Arbor USA

ISBN: (纸本)9781479913022

To make full use of the damping control capability of doubly-fed induction generators (DFIGs) and simultaneously minimize the detrimental impact on torsional oscillations of DFIGs. A hybrid power modulation PSS (HPM-PSS) combining both reactive power modulation (RPM) and active power modulation (APM) using the same feedback input signal is first proposed. Here the RPM part has the priority as it has little influence on torsional oscillations of DFIGs and APM part is complementary to further increase system damping to the objective value. Then a step by step optimization algorithm is developed to tune HPM-PSS parameters. The effectiveness of HPM-PSS is demonstrated by time-domain simulations and Prony analysis under different operation states and power control modes of the DFIG in a two-area test system.

关键词： Damping control hybrid power modulation torsional oscillations wind power generation TORSIONAL VIBRATION Wind energy generation Induction generators damped control doubly-fed running condition PROBABILISTIC SAFETY STUDY Test systems revolutions per minute AXIAL POWER MONITORS

来源：评论

学校读者我要写书评

暂无评论

Performance optimization of Jacobi stencil algorithms based on POWER8 architecture

Performance optimization of Jacobi stencil algorithms based ...

引用

International Conference on Application Specific systems (ASAP), architectures and Processors

作者： Jingheng Xu Haohuan Fu Lin Gan Yu Song Hongbo Peng Wen Shi Guangwen Yang Department of Computer Science & Technology Tsinghua University National Supercomputer Center at Wuxi Ministry of Education Key Lab. for Earth System Modeling Tsinghua University IBM China Systems and Technology Laboratory

In this paper we choose the widely used Jacobi stencil algorithm as our target program to evaluate the effectiveness of tuning techniques based on the latest POWER8 processor, thus to provide optimization guidelines t... 详细信息

ISBN: (纸本)9781509015047

关键词： Optimization Jacobian matrices Hardware Instruction sets Tuning computer architecture Software performance

来源：评论

学校读者我要写书评

暂无评论

Multi-objective optimal control algorithm for HVAC based on particle swarm optimization

Multi-objective optimal control algorithm for HVAC based on ...

引用

International Conference on Intelligent Control and Information Processing (ICICIP)

作者： Yanyu Zhang Peng Zeng Chuanzhi Zang School of Computer and Information Engineering Henan University Kaifeng China University of Chinese Academy of Sciences Beijing China Key Lab. of Networked Control System Chinese Academy of Sciences Shenyang China

ISBN: (纸本)9781479936519

Residential sector is the biggest potential field of reducing peak demand through demand response (DR) in smart grid. Heating, ventilating, and air conditioning (HVAC) is the largest residential electricity user in house. Therefore, controlling the operation of HVAC is an effective method to implement DR in residential sector. The algorithms proposed in literature are single objective optimization algorithms that only minimize the electricity cost and could not quantify the user's comfort level. To tackle this problem, this paper proposes a comfort level indicator, builds a multi-objective scheduling model, and presents a multi-objective optimal control algorithm for HVAC based on particle swarm optimization (PSO). The algorithm controls the operation of HVAC according to electricity price, outdoor temperature forecast, and user preferences to minimize the electricity cost and maximize the user comfort level simultaneously. The proposed algorithm is verified by simulations, and the results demonstrate that it can decrease the electricity cost significantly and maintain the user comfort level effectively.

关键词： Electricity Vectors Smart grids Pareto optimization Optimal control Temperature control

来源：评论

学校读者我要写书评

暂无评论

Improved cryptanalysis of the VMPC stream cipher

引用

Journal of Computational Information systems 2012年第2期8卷 831-838页

作者： Li, Shunbo Hu, Yupu Zhao, Yongbin Wang, Yan Department of Mathematics Xidian University Xi'an 710071 China Key Lab. of Computer Networks and Information Security Ministry of Education Xidian University Xi'an 710071 China School of Science Xi'an University of Architecture and Technology Xi'an 710055 China

VMPC is a modified RC4 stream cipher proposed in FSE 2004, which is designed especially to resist distinguishing attacks. In this paper, we present a heuristic distinguishing attack against VMPC. By finding the weakness in the first two words of a keystream with two effective assumptions, we build a distinguisher and get a considerable bias. This attack only requires about 234.02 output bytes to distinguish VMPC from truly random sequence with success probability 0.9545. Thereby, this technique is further used to the Tsunoo's method and improve his results by a factor of about 24. 1553-9105/Copyright © 2012 Binary Information Press.

关键词： Cryptography

来源：评论

学校读者我要写书评

暂无评论

Research on load balancing strategy based on middleware

引用

ICIC Express Letters 2014年第9期8卷 2655-2661页

作者： Gu, Xiaoying Liu, Yongshan Man, Yubao Department of Information Science and Engineering Qinhuangdao 066004 China The Key Lab. for Computer Virtual Tech. and System Integration of Hebei Province Yanshan University No. 438 Hebei Ave Qinhuangdao 066004 China Data Industry Research Lab Qinhuangdao 066004 China

According to the former research achievements about load balancing strategy, considering the load distribution, the load condition of service node and the number of user connections, we propose a load balancing strategy based on middleware. According to the cluster service load and the number of user connections, the requests from user will be reasonably allocated to each service node by using middleware technology, then service node and requested user establish a temporary connection, after all the requests of this user are processed by this node. Experiments show that, this strategy reduces the number of requests for allocation, improves the resource utilization rate of cluster system and load balancing degree, and effectively suppresses the load jitter of system. © 2014 ISSN 1881-803X.

关键词： Middleware

来源：评论

学校读者我要写书评

暂无评论

SliceProp: A Slice-Wise Bidirectional Propagation Model for Interactive 3D Medical Image Segmentation 1

SliceProp: A Slice-Wise Bidirectional Propagation Model for ...

引用

1st IEEE International Conference on Medical Artificial Intelligence, MedAI 2023

作者： Xu, Xin Lu, Wenjing Lei, Jiahao Qiu, Peng Shen, Hong-Bin Yang, Yang Shanghai Jiao Tong University Key Lab. of Shanghai Education Commission for Intelligent Interaction and Cognitive Engineering Department of Computer Science and Engineering Shanghai200240 China Shanghai Ninth People's Hospital Shanghai Jiao Tong University School of Medicine Department of Vascular Surgery China Shanghai Jiao Tong University Institute of Image Processing and Pattern Recognition Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai200240 China

ISBN: (纸本)9798350358780

Interactive medical image segmentation methods have become increasingly popular in recent years. These methods combine manual lab.ling and automatic segmentation, reducing the workload of annotation while maintaining high accuracy. However, most current interactive segmentation frameworks are limited to 2D image data, and are not suitable for 3D image data due to the large size and high complexity of 3D data, as well as the challenges posed by information asymmetry and sparse annotation. In this paper, we propose SliceProp, an interactive segmentation framework that implements slice-wise lab.l Bidirectional Propagation (LBP) for 3D medical image segmentation. SliceProp extends the interactive 2D image segmentation algorithm to 3D image segmentation, and can handle 3D data with large size and high complexity. Moreover, equipped with a Backtracking Feedback Check (BFC) module, SliceProp effectively addresses the issues of information asymmetry and spatial sparse annotation in 3D medical image segmentation. Additionally, we adopt an uncertainty-based criterion to pri-oritize the slices to be refined interactively, which enhances the efficiency of the interaction process by enabling the model to focus on the regions with the most unreliable predictions. SliceProp is evaluated on two datasets and achieves promising results compared to state-of-the-art methods. © 2023 IEEE.

关键词： Medical imaging

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：