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2021 IEEE International Conference on Bioinformatics and Biomedicine, BIBM 2021

作者： Xiao, Feng Shen, Cong Chen, Yu Yang, Tian Chen, Shengyong Liao, Zhijun Tang, Jijun Tianjin University of Technology School of Computer Science and Engineering Tianjin China Engineering Research Center of Learning-Based Intelligent System Ministry of Education Tianjin China School of Basic Medical Sciences Fujian Medical University Fujian Fuzhou China College of Intelligence and Computing Tianjin University Tianjin China Key Laboratory of Systems Bioengineering Ministry of Education Tianjin China Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Guangdong Shenzhen China Department of Computer Science and Engineering University of South Carolina ColumbiaSC United States

ISBN: (纸本)9781665401265

Drawing support from an effective Medical Image Segmentation (MIS) is conducive to a substantial diagnostic basis for the physicians to identify the focus lesion in the patient body and give the subsequent clinical assessment of the patient status. Although various works have tried the challenging quantitative analysis problem, it is still difficult to conduct precise automatic segmentation, especially the soft tissue organs. In this decade, with the increased amount of available datasets, deep learning-based networks have achieved remarkable performance in image processing. Inspired by the state-of-the-art deep learning works, in this paper, we propose an end-to-end multi-layer network named RCGA-Net. It consists of an encoder-decoder backbone that integrates a coordinate attention mechanism based on space and channel and a global context extraction module to highlight more valuable information. To evaluate the performance of RCGA-Net, we apply it to different kinds of clinical and experimental MIS tasks to testify its generalization ability. Extensive experiments represent that our schema has taken the outperform or compatible results among the comparison methods group. Specifically, the numeric result of RCGA-Net on the pulmonary dataset has achieved a 99.12% optimum F1-score. © 2021 IEEE.

关键词： Diagnosis

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Address register promotion method based on feedbacks

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Jisuanji Yanjiu yu Fazhan/computer Research and Development 2009年第4期46卷 698-704页

作者： Zhang, Chao Lü, Fang Wang, Lei Feng, Xiaobing Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China Graduate University Chinese Academy of Sciences Beijing 100049 China

In processor architectures such as MIPS, ALPHA, SPARC and PowerPC, indirect addressing mode is always adopted to access global variables and static ones. Since the addresses of these variables and the corresponding values are in different data sections in the corresponding binary file, the data locality of the program will be very poor. As a result, accessing the read only addresses of these variables every time tends to result in non-trivial redundant data cache miss memory accesses. Moreover, such indirect addressing mode will generate two sequential load instructions which have data dependences between them. As a result, the amount of instruction level parallelism (ILP) of the program will be decreased. The authors present an address register promotion method based on feedbacks (ARPF) to solve the above problems. ARPF algorithm reduces the redundant accesses to the read only addresses of the global variables and static ones, increases the amount of instruction level parallelism of a program, and avoids the performance declines due to the increase in register pressure caused by register promotion. The algorithm has been implemented in the Loongson compiler for MIPS architecture. Experiments on SPEC CPU2000INT benchmarks are conducted to show that ARPF can improve the performance of all benchmarks by 1%-6%.

关键词： Benchmarking

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A scan chain optimization method for diagnosis

A scan chain optimization method for diagnosis

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IEEE International Conference on computer Design: VLSI in computers and Processors, (ICCD)

作者： Huajun Chen Zichu Qi Lin Wang Chao Xu ICT State Key Laboratory of Computer Architecture Beijing China University-of Chinese Academy of Sciences Beijing China Institute of Computing Technoloay Chinese Academy of Sciences Beijing China Loongson Technology Corporation Limited Beijing China

Scan chain structure consumes 10%~30% of die area, and most yield loss is caused by scan chain faults. This makes scan chain diagnosis be the key important method to ensure the high-quality products. The conventional scan chain diagnosis techniques usually conduct to a large range of suspect faulty flip flops. The failure analysis of those suspect faulty flip flops is time-consuming and costly. In this paper, we present a new scan chain construction method to reduce the range of suspect faulty flip flops. By constructing scan chains based on circuit logical structure, the proposed method can effectively improve the diagnosability of scan chains without any additional circuits. Moreover, by taking into consideration the physical location, the proposed method can decrease the negative effects of scan chains on the performance of designs. The proposed scan chain construction method can effectively handle a single scan chain fault as well as multiple scan chain faults. The experimental results show that the range of suspect faulty flip flops is reduced by 40%~90% on the most of ITC'99 benchmark circuits.

关键词： Circuit faults Logic gates Hardware Load modeling Controllability Software Integrated circuit modeling

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Asymptotic throughput for large-scale wireless networks with general node density

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Wireless Networks 2012年第5期19卷 559-575页

作者： Cheng Wang Changjun Jiang Xiang-Yang Li Yunhao Liu Department of Computer Science Tongji University Shanghai China Key Laboratory of Embedded System and Service Computing Ministry of Education Shanghai China The Tsinghua National Laboratory for Information Science and Technology (TNLIST) Department of Computer Science and Engineering Tongji University Shanghai China The Department of Computer Science Illinois Institute of Technology Chicago USA The TNLIST and School of Software Tsinghua University Beijing China CSE The Hong Kong University of Science and Technology Kowloon Hong Kong

We study the asymptotic throughput for a large-scale wireless ad hoc network consisting of n nodes under the generalized physical model. We directly compute the throughput of multicast sessions to unify the unicast and broadcast throughputs. We design two multicast schemes based on the so-called ordinary arterial road system and parallel arterial road system, respectively. Correspondingly, we derive the achievable multicast throughput by taking account of all possible cases of n s = ω(1) and 1 ≤ n d ≤ n − 1, rather than only the cases of $$n_s=\Uptheta(n)$$ as in most related works, where n s and n d denote the number of sessions and the number of destinations of each session, respectively. Furthermore, we consider the network with a general node density $$\lambda \in [1,n]$$ , while the models in most related works are either random dense network (RDN) or random extended network (REN) where the density is λ = n and λ = 1, respectively, which further enhances the generality of this work. Particularly, for the special case of our results by letting λ = 1 and $$n_s=\Uptheta(n)$$ , we show that for some regimes of n d , the multicast throughputs achieved by our schemes are better than those derived by the well-known percolation-based schemes.

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Edge AIBench: Towards comprehensive end-to-end edge computing benchmarking

arXiv

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arXiv 2019年

作者： Hao, Tianshu Huang, Yunyou Wen, Xu Gao, Wanling Zhang, Fan Zheng, Chen Wang, Lei Ye, Hainan Hwang, Kai Ren, Zujie Zhan, Jianfeng State Key Laboratory of Computer Architecture Institute of Computing Technology Chinese Academy of Sciences University of Chinese Academy of Sciences BenchCouncil [International Open Benchmarking Council Beijing Academy of Frontier Sciences and Technology Chinese University of Hongkong at Shenzhen Zhejiang Lab

In edge computing scenarios, the distribution of data and collaboration of workloads on different layers are serious concerns for performance, privacy, and security issues. So for edge computing benchmarking, we must take an end-to-end view, considering all three layers: client-side devices, edge computing layer, and cloud servers. Unfortunately, the previous work ignores this most important point. This paper presents the BenchCouncil’s coordinated effort on edge AI benchmarks, named Edge AIBench. In total, Edge AIBench models four typical application scenarios: ICU Patient Monitor, Surveillance Camera, Smart Home, and Autonomous Vehicle with the focus on data distribution and workload collaboration on three layers. Edge AIBench is a part of the open-source AIBench project, publicly available from http://***/AIBench/***. We also build an edge computing testbed with a federated learning framework to resolve performance, privacy, and security issues. Copyright © 2019, The Authors. All rights reserved.

关键词： Edge computing

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Multiple Coupling Effects Oriented Path Delay Test Generation

Multiple Coupling Effects Oriented Path Delay Test Generatio...

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26th IEEE VLSI Test Symposium (VTS 2008)

作者： Minjin Zhang Huawei Li Xiaowei Li Graduate School of Chinese Academy of Sciences Beijing China Key Laboratory of Computer System and Architecture Chinese Academy of Sciences Beijing China Academy of Sciences Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy and Sciences Beijing China

We propose a two-phase test generation method to generate patterns targeting maximal path delay caused by multiple crosstalk effects. A timing analysis method based on transition map is proposed to manage the timing information of aggressor lines and victim lines in the first phase, followed by an ordinary ATPG engine with a few alterations in the second phase. This two-phase method avoids complex timing processing in ATPG algorithm. Using transition map instead of timing window in timing analysis, our method can more efficiently calculate the accumulative crosstalk-induced delay and find the sub-paths which cause maximal coupling effects. We can trade off accuracy and efficiency by controlling the size of timescale used in transition map, which makes this approach highly scalable.

关键词： Delay effects Testing Timing Test pattern generators Crosstalk Automatic test pattern generation Information analysis Information management Engines Cause effect analysis

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SelectCast: Scalable data aggregation scheme in wireless sensor networks

SelectCast: Scalable data aggregation scheme in wireless sen...

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IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： Cheng Wang Shaojie Tang Xiang-Yang Li Changjun Jiang Key Laboratory of Embedded System and Service Computing Ministry of Education Shanghai China Department of Computer Science University of Tongji Shanghai China Department of Computer Science Illinois Institute of Technology Chicago IL USA TNLIST School of Software Tsinghua University China

In this work, for a wireless sensor network (WSN) of n randomly placed sensors with node density λ ∈ [1, n], we study the tradeoffs between the aggregation throughput and gathering efficiency. The gathering efficiency refers to the ratio of the number of the sensors whose data have been gathered to the total number of sensors. Specifically, we design two efficient aggregation schemes, called single-hop-length (SLH) scheme and multiple-hop-length (MLH) scheme. By novelly integrating these two schemes, we theoretically prove that our protocol achieves the optimal tradeoffs, and derive the optimal aggregation throughput depending on a given threshold value (lower bound) on gathering efficiency. Particularly, we show that under the MLH scheme, for a practically important set of symmetric functions called perfectly compressible functions, including the mean, max, or various kinds of indicator functions, etc., the data from Θ(n) sensors can be aggregated to the sink at the throughput of a constant order Θ(1), implying that our MLH scheme is indeed scalable.

关键词： TV Wireless sensor networks Power capacitors Blogs Lattices

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Hybrid approach of filtering unnecessary way accesses for set-associative caches

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Jisuanji Xuebao/Chinese Journal of computers 2013年第4期36卷 799-808页

作者： Fan, Ling-Jun Xu, Yuan-Chao Shi, Wei-Song Fan, Dong-Rui Lou, Jie State Key Laboratory of Computer Architecture Institute of Computing Technology Chinese Academy of Science Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China Department of Computer Science Wayne State University Detroit MI-48202 United States Intel Corporation Beijing 100190 China College of Information Engineering Capital Normal University Beijing 100048 China

Power has been a big issue in processor design for several years. Conventional popular approaches for addressing this issue like DVFS (Dynamic Voltage Frequency Scaling) now hit the law of diminishing returns. As multi/many-core processors becoming the main stream processors, caches account for more and more CPU die area and power, this paper presents using filtering unnecessary way accesses to reduce dynamic power consumption of caches shared by instruction and data. The methods include using Invalid Filter, which could eliminate accesses to cache ways contained invalid blocks, and I/D Filter, which could eliminate accesses to cache ways contained instruction/data access type mismatch blocks, and Tag-2 Filter, which could eliminate accesses to cache ways contained tag lowest 2 bits mismatch blocks. Since the methods reducing the activities happened in cache architecture, dynamical CPU power could be significantly decreased. In the paper, we also propose combining the above methods together, which is called Invalid+I/D+Tag-2 Filter, in an attempt to achieve better power saving results. We have verified the effectiveness and complementariness of the three proposed methods through analysis and experiments. Also, our evaluations show that, we could obtain 19.6%~47.8% (which is on average 34.3%) improvement on a 64KB-4way set-associative cache and 19.6%~55.2% (which is on average 39.2%) improvement on a 128KB-8way set-associative cache comparing to Invalid+I/D Filter, and 16.1%~27.7% (which is on average 16.6%) improvement on a 64KB-4way set-associative cache and 6.9%~44.4% (which is on average 25.0%) improvement on a 128KB-8way set-associative cache comparing to Invalid+Tag-2 Filter, respectively.

关键词： Bandpass filters

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Noncontact Doppler Radar-based Heart Rate Detection on the SVD and ANC

Noncontact Doppler Radar-based Heart Rate Detection on the S...

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2022 IEEE International Conference on Bioinformatics and Biomedicine, BIBM 2022

作者： Shi, Qiuxia Hu, Bin Tian, Fuze Zhao, Qinglin Gansu Provincial Key Laboratory of Wearable Computing School of Information Science and Engineering Lanzhou University China School of Computer and Communication Lanzhou University of Technology China Key Laboratory of Special Functional Materials and Structural Design Lanzhou University Ministry of Education Lanzhou China CAS Center for Excellence in Brain Science and Intelligence Technology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences China Joint Research Center for Cognitive Neurosensor Technology of Lanzhou University Institute of Semiconductors Chinese Academy of Sciences China Engineering Research Center of Open Source Software and Real-Time System Lanzhou University Ministry of Education China

ISBN: (纸本)9781665468190

In the Doppler biological radar-based applications of noncontact measurement of vital signs, effectively extracting heartbeat information from weak thoracic mechanical motion is an important problem to be solved. This study is aimed at extracting heartbeat signal via the technology combined with Short Time Fourier Transform (STFT), Singular Value Decomposition (SVD) and Adaptive Noise Canceller (ANC) from radar recording. The simulated data and the data collected by Doppler radar biosensor realized in laboratory are employed to validate the proposed method. The results show that the proposed method has the ability of detection for the heart rate and heart rate variability indexes in rest state, it has certain advantages in time-consuming and detection accuracy. Therefore, the current method provides another way to process vital sign signals recorded by Doppler radar. © 2022 IEEE.

关键词： Singular value decomposition

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Battery discharge characteristics of wireless sensors in building applications

Battery discharge characteristics of wireless sensors in bui...

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IEEE International Conference on Networking, Sensing and Control

作者： Wenqi Guo William M. Healy Meng Chu Zhou Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ USA National Institute for Standards and Technology Gaithersburg MD USA Key Laboratory of Embedded System and Service Computing Ministry of Education University of Tongji Shanghai China ECE Department New Jersey Institute of Technology Newark NJ USA

Sensor nodes in wireless networks often use batteries as their source of energy, but replacing or recharging exhausted batteries in a deployed network can be difficult and costly. Therefore, prolonging battery life becomes a principal objective in the design of wireless sensor networks (WSNs). There is little published data that quantitatively analyze a sensor node's lifetime under different operating conditions. This paper presents several experiments to quantify the impact of key wireless sensor network design and environmental parameters on battery performance. Our testbed consists of MicaZ motes, commercial alkaline batteries, and a suite of techniques for measuring battery performance. We evaluate known parameters, such as communication distance, working channel and operating power that play key roles in battery performance. Through extensive real battery discharge measurements, we expect our results to serve as a quantitative basis for future research in designing and implementing battery-efficient sensing applications and protocols.

关键词： Batteries Wireless sensor networks Discharges (electric) Sensor phenomena and characterization Battery charge measurement Voltage measurement

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