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S-Mesh: a Mesh-based on-chip network with separation of control and transmission

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The Journal of China Universities of Posts and Telecommunications 2009年第5期16卷 86-91,102页

作者： LIU Hao ZOU Xue-cheng JI Li-xin CAI Meng ZHANG Ke-feng department of Electronic Science and Technology Huazhong University of Science and Technology Wuhan 430074 China national digital switching system engineering and technological r&d center Zhengzhou 450002 China

The current network-on-chip （NoC） topology cannot predict subsequent switch node status promptly. Switch nodes have to perform various functions such as routing decision, data forwarding, packet buffering, congestion control and properties of an NoC system. Therefore, these make switch architecture far more complex. This article puts forward a separating on-chip network architecture based on Mesh （S-Mesh）, S-Mesh is an on-chip network that separates routing decision flow from the switches. It consists of two types of networks： datapath network （dN） and control network （CN）. The CN establishes data paths for data transferring in dN. Meanwhile, the CN also transfers instructions between different resources. This property makes switch architecture simple, and eliminates conflicts in network interface units between the resource and switch. Compared with 2d-Mesh, Toms Mesh, Fat-tree and Butterfly, the average packet latency in S-Mesh is the shortest when the packet length is more than 53 B. Compared with 2d-Mesh, the areas savings of S-Mesh is about 3%-7/% and the power dissipation is decreased by approximate 2%.

关键词： network on-chip Mesh architecture separation system congestion avoidance lower latency

Constructing donor–Acceptor‑Linked COFs Electrolytes to regulate Electron density and Accelerate the Li^(+)Migration in Quasi‑Solid‑State Battery

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Nano-Micro Letters 2025年第1期17卷 456-471页

作者： Genfu Zhao Hang Ma Conghui Zhang Yongxin Yang Shuyuan Yu Haiye Zhu Yongjiang Sun Hong Guo School of Materials and Energy International Joint Research Center for Advanced Energy Materials of Yunnan ProvinceYunnan UniversityKunming 650091People’s Republic of China Yunnan Yuntianhua Co. LtdR&D CenterKunming 650228People’s Republic of China Southwest United Graduate School Kunming 650091People’s Republic of China

regulation the electronic density of solid-state electrolyte by donor–acceptor(d–A)system can achieve highly-selective Li^(+)transportation and conduction in solid-state Li metal *** study reports a high-performance solid-state electrolyte thorough d–A-linked covalent organic frameworks(COFs)based on intramolecular charge transfer *** other reported COFbased solid-state electrolyte,the developed concept with d–A-linked COFs not only achieves electronic modulation to promote highly-selective Li^(+)migration and inhibit Li dendrite,but also offers a crucial opportunity to understand the role of electronic density in solid-state Li metal *** introduced strong electronegativity F-based ligand in COF electrolyte results in highlyselective Li^(+)(transference number 0.83),high ionic conductivity(6.7×10^(-4)S cm^(−1)),excellent cyclic ability(1000 h)in Li metal symmetric cell and high-capacity retention in Li/LiFePO_(4)cell(90.8%for 300 cycles at 5C)than substituted C-and N-based *** is ascribed to outstanding d–A interaction between donor porphyrin and acceptor F atoms,which effectively expedites electron transferring from porphyrin to F-based ligand and enhances Li^(+)***,we anticipate that this work creates insight into the strategy for accelerating Li^(+)conduction in high-performance solid-state Li metal batteries through d–A system.

关键词： Electronic modulation engineering donor-acceptor-linked covalent organic frameworks Quasi-solid-state Li metal battery

Controllable single accumulated state-sequential acquisition with low signal noise ratio

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Science in China(Series F) 2009年第5期52卷 858-866页

作者： JI Jiang HUANG KaiZhi JIN Liang ZHANG LiZhi ZHANG Meng national digital switching system engineering & technological research center Zhengzhou 450002 China

The sequential estimation （SE） algorithm has a poor performance in the environment with a low signalto-noise ratio （SNr） and a high bit error rate （BEr）, especially for unknown initial acquisition sequence. This paper summarizes the conventional sequence acquisition model, and discovers its several problems, which are caused by accumulating sequence innovation to all of the received sequences dispersedly. To solve these problems, the paper presents a new algorithm, CSAS-SA （controllable single accumulated state-sequential acquisition）. This algorithm accumulates the sequence innovation to a single appointed sequence state and makes the useful information accumulated effectively. Through simulation, CSAS-SA has a higher probability of success acquisition. When SNr equals -3 dB, the performance can be improved by 70%.

关键词： pseudo-noise (PN) sequence single accumulated state sequential acquisition control state

derivative-Hilbert-Backprojection based image reconstruction from truncated projections in helical cone-beam CT

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Nuclear Science and Techniques 2015年第2期26卷 45-53页

作者：张峰闫镔李磊席晓琦江桦魏星张翔崔进鲜 national digital switching system engineering & Technology research center

In helical cone-beam computed tomography(CT), Feldkamp-davis-Kress(FdK) based image reconstruction algorithms are by far the most popular. However, artifacts are commonly met in the presence of lateral projection truncation. The reason is that the ramp filter is global. To restrain the truncation artifacts, an approximate reconstruction formula is proposed based on the derivative-Hilbert-Backprojection(dHB) framework. In the method, the first order derivative filter is followed by the Hilbert transform. Since the filtered projection values are almost zero by the first order derivative filter, the following Hilbert transform has little influence on the projection values, even though the projections are laterally truncated. The proposed method has two main advantages. First, it has comparable computational efficiency and image quality as well as the conventional helical FdK algorithm for non-truncated projections. The second advantage is that images can be reconstructed with acceptable quality and much lower computational cost in comparison to the Laplace operator based algorithm in cases with truncated projections. To point out the advantages of our method, simulations on the computer and real data experiments on our laboratory industrial cone-beam CT are conducted. The simulated and experimental results demonstrate that the method is feasible for image reconstruction in the case of projection truncation.

关键词：图像重建算法希尔伯特变换锥束CT 反投影衍生物截短螺旋锥形

robust secure transmission for multiuser MISO systems with probabilistic QoS constraints

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Science China(Information Sciences) 2016年第2期59卷 126-138页

作者： Lijian ZHANG Liang JIN Wenyu LUO Chunming WANG Yanqun TANG national digital switching system engineering & technological research center School of Information systems engineering Zhengzhou Information Science and Technology Institute

This paper considers a unicast multiuser multiple-input single-output(MISO) downlink system overheard by multiple single-antenna eavesdroppers. The objective is to jointly design the beamforming vectors and the artificial noise(AN) covariance matrix with imperfect channel state information(CSI) at the transmitter,such that the total transmit power is minimized while satisfying probabilistic quality of service(Qo S) constraints at legitimate users and the eavesdroppers. Using Bernstein-type inequalities and the S-procedure, we recast the non-convex power minimization problem as two different convex semidefinite programs(SdPs) which can be solved using interior-point methods. Simulation results show that the proposed methods outperform a nonrobust method and the ones using the isotropic AN.

关键词： physical layer security artificial noise imperfect CSI robust beamforming semidefinite program outage probability

Feature-aligned segmentation using correlation clustering

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Computational Visual Media 2017年第2期3卷 147-160页

作者： Yixin Zhuang Hang dou Nathan Carr Tao Ju national digital switching system engineering & technological research center Washington University in St. Louis Adobe

We present an algorithm for segmenting a mesh into patches whose boundaries are aligned with prominent ridge and valley lines of the shape. Our key insight is that this problem can be formulated as correlation clustering(CC), a graph partitioning problem originating from the data mining *** formulation lends two unique advantages to our method over existing segmentation methods. First,since CC is non-parametric, our method has few parameters to tune. Second, as CC is governed by edge weights in the graph, our method offers users direct and local control over the segmentation result. Our technical contributions include the construction of the weighted graph on which CC is defined, a strategy for rapidly computing CC on this graph, and an interactive tool for editing the segmentation. Our experiments show that our method produces qualitatively better segmentations than existing methods on a wide range of inputs.

关键词： mesh segmentation correlation clustering(CC) feature lines

dESIGN ANd EVALUATION OF A PIPELINEd FOrWArdING ENGINE

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Journal of Electronics(China) 2007年第2期24卷 157-162页

作者： Li Yufeng Chen Yue Lan Julong national digital switching system engineering ＆ technological r ＆d center Zhengzhou 450002 China

recent advances in broadband technology have caused forwarding engines to handle pack- ets with over 10 gigabit per second. In this paper, we present a high-speed forwarding pipeline which can finish all of the routing and forwarding tasks in the way of pipelining. We also establish the analysis model of the pipeline with which one can evaluate some key performance parameters of the forwarding engine such as forwarding rate and forwarding delay. We find that the pipeline is of good scalability and can forward unicast packets up to the speed of 40Gbit/s.

关键词： design Forwarding engine Pipeline Evaluate

A forwarding graph embedding algorithm exploiting regional topology information

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Frontiers of Information Technology & Electronic engineering 2017年第11期18卷 1854-1866页

作者： Hong-chao HU Fan ZHANG Yu-xing MAO Zhen-peng WANG national digital switching system engineering & technological r&d center Zhengzhou 450002 China

Network function virtualization （NFV） is a newly proposed technique designed to construct and manage network fimctions dynamically and efficiently. Allocating physical resources to the virtual network function forwarding graph is a critical issue in NFV. We formulate the forwarding graph embedding （FGE） problem as a binary integer programming problem, which aims to increase the revenue and decrease the cost to a service provider （SP） while considering limited network resources and the requirements of virtual functions. We then design a novel regional resource clustering metric to quantify the embedding potential of each substrate node and propose a topology-aware FGE algorithm called ＇regional resource clustering FGE＇（rrC-FGE）. After implementing our algorithms in C＋＋, simulation results showed that the total revenue was increased by more than 50 units and the acceptance ratio by more than 15%, and the cost of the service provider was decreased by more than 60 units.

关键词： Network function virtualization Virtual network function Forwarding graph embedding

A Topological Evolution Model Based on the Attraction of the Motif Vertex

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China Communications 2021年第4期18卷 27-39页

作者： Xing Li Shuxin Liu Yuhang Zhu Yingle Li PLA Strategic Support Force Information engineering University Zhengzhou 450001Henan ProvinceChina national digital switching system engineering and technological r&d center Zhengzhou 450002Henan ProvinceChina

As a fundamental problem in the field of the network science,the study of topological evolution model is of great significance for revealing the inherent dynamics and mechanisms of complex network *** order to study the influence of different scales of preferential attachment on topological evolution,a topological evolution model based on the attraction of the motif vertex is *** the perspective of network motif,this model proposes the concept of attraction of the motif vertex based on the degree of the motif,quantifies the influence of local structure on the node preferential attachment,and performs the preferential selection of the new link based on the Local World *** simulation experiments show that the model has the small world characteristic apparently,and the clustering coefficient varies with the scale of the local *** degree distribution of the model changes from power-law distribution to exponential distribution with the change of *** some cases,the piecewise power-law distribution is *** addition,the proposed model can present a network with different matching patterns as the parameters change.

关键词： complex network topological evolution model network motif