Weimin Zheng

ORCID

Publication Activity (10 Years)

Years Active: 1991-2024
Publications (10 Years): 93

Top Venues

IEEE Trans. Parallel Distributed Syst.

IEEE Trans. Computers

ICPP

FAST

Publications

Ruoyu Qin, Zheming Li, Weiran He, Mingxing Zhang, Yongwei Wu, Weimin Zheng, Xinran Xu
Mooncake: A KVCache-centric Disaggregated Architecture for LLM Serving. CoRR (2024)
Yuguo Yuan, Weimin Zheng
Your trip, your way: An adaptive tourism recommendation system. Appl. Soft Comput. 154 (2024)
Xiaqing Li, Qi Guo, Guangyan Zhang, Siwei Ye, Guanhua He, Yiheng Yao, Rui Zhang, Yifan Hao, Zidong Du, Weimin Zheng
FastTuning: Enabling Fast and Efficient Hyper-Parameter Tuning With Partitioning and Parallelism of Search Space. IEEE Trans. Parallel Distributed Syst. 35 (7) (2024)
Shangkun Liu, Yanxin Li, Qing-Wei Chai, Weimin Zheng
Region-scalable fitting-assisted medical image segmentation with noisy labels. Expert Syst. Appl. 238 (Part C) (2024)
Chengyu Jiang, Shangkun Liu, Jingyu Wang, Shi-Cheng Guo, Weimin Zheng
A Tumor Segmentation Method Based on Mean-Teacher Reusing Pseudo-Labels. IEEE Access 12 (2024)
Junyu Wei, Guangyan Zhang, Junchao Chen, Yang Wang, Weimin Zheng, Tingtao Sun, Jiesheng Wu, Jiangwei Jiang
Exploiting Data-pattern-aware Vertical Partitioning to Achieve Fast and Low-cost Cloud Log Storage. ACM Trans. Storage 20 (2) (2024)
Weimin Zheng, Fanying Meng, Ning Liu, Shuo Huang
A Game Model for Analyzing Wireless Sensor Networks of 5G Environment Based on Adaptive Equilibrium Optimizer Algorithm. Sensors 23 (19) (2023)
Yuhang Fu, Weiqi Shen, Jiahuan Cui, Yao Zheng, Guangwen Yang, Zhao Liu, Jifa Zhang, Tingwei Ji, Fangfang Xie, Xiaojing Lv, Hanyue Liu, Xu Liu, Xiyang Liu, Xiaoyu Song, Guocheng Tao, Yan Yan, Paul Tucker, Steven A. E. Miller, Shirui Luo, Seid Koric, Weimin Zheng
Toward Exascale Computation for Turbomachinery Flows. SC (2023)
Junyu Wei, Guangyan Zhang, Junchao Chen, Yang Wang, Weimin Zheng, Tingtao Sun, Jiesheng Wu, Jiangwei Jiang
LogGrep: Fast and Cheap Cloud Log Storage by Exploiting both Static and Runtime Patterns. EuroSys (2023)
Renhao Fan, Yikai Cui, Qilin Chen, Mingyu Wang, Youhui Zhang, Weimin Zheng, Zhaolin Li
MAICC : A Lightweight Many-core Architecture with In-Cache Computing for Multi-DNN Parallel Inference. MICRO (2023)
Yuhang Fu, Weiqi Shen, Jiahuan Cui, Yao Zheng, Guangwen Yang, Zhao Liu, Jifa Zhang, Tingwei Ji, Fangfang Xie, Xiaojing Lv, Hanyue Liu, Xu Liu, Xiyang Liu, Xiaoyu Song, Guocheng Tao, Yan Yan, Paul Tucker, Steven A. E. Miller, Shirui Luo, Seid Koric, Weimin Zheng
Towards Exascale Computation for Turbomachinery Flows. CoRR (2023)
Weimin Zheng, Senyuan Pang, Ning Liu, Qing-Wei Chai, Lindong Xu
A Compact Snake Optimization Algorithm in the Application of WKNN Fingerprint Localization. Sensors 23 (14) (2023)
Xianzhe Liu, Weimin Zheng, Yangqing Dan, Zhen Wang, Chenxuan Wang
A Vector-fitting-based Impedance Reshaping Method for Sub-synchronous Oscillation Suppression in Converter-dominated System. CCRIS (2023)
Linxueying Zhou, Shangkun Liu, Weimin Zheng
Automatic Analysis of Transverse Musculoskeletal Ultrasound Images Based on the Multi-Task Learning Model. Entropy 25 (4) (2023)
Guangyan Zhang, Dan Feng, Keqin Li, Zili Shao, Nong Xiao, Jin Xiong, Weimin Zheng
Design and application of new storage systems. Frontiers Inf. Technol. Electron. Eng. 24 (5) (2023)
Peng Qu, Hui Lin, Meng Pang, Xiaofei Liu, Weimin Zheng, Youhui Zhang
ENLARGE: An Efficient SNN Simulation Framework on GPU Clusters. IEEE Trans. Parallel Distributed Syst. 34 (9) (2023)
Jidong Zhai, Liyan Zheng, Jinghan Sun, Feng Zhang, Xiongchao Tang, Xuehai Qian, Bingsheng He, Wei Xue, Wenguang Chen, Weimin Zheng
Leveraging Code Snippets to Detect Variations in the Performance of HPC Systems. IEEE Trans. Parallel Distributed Syst. 33 (12) (2022)
Xiang Fei, Jianhui Han, Jianqiang Huang, Weimin Zheng, Youhui Zhang
Accelerating Neural Network Training with Processing-in-Memory GPU. CCGRID (2022)
Peng Qu, Le Yang, Weimin Zheng, Youhui Zhang
A review of basic software for brain-inspired computing. CCF Trans. High Perform. Comput. 4 (1) (2022)
Lianshan Liu, Li Tang, Weimin Zheng
Lossless Image Steganography Based on Invertible Neural Networks. Entropy 24 (12) (2022)
Ruini Xue, Yijun Wang, Shengbo Liu, Yunxiang Li, Wenhong Tian, Weimin Zheng
SPAC: Scalable Pattern Approximate Counting in Graph Mining. ICA3PP (2022)
Zixuan Ma, Jiaao He, Jiezhong Qiu, Huanqi Cao, Yuanwei Wang, Zhenbo Sun, Liyan Zheng, Haojie Wang, Shizhi Tang, Tianyu Zheng, Junyang Lin, Guanyu Feng, Zeqiang Huang, Jie Gao, Aohan Zeng, Jianwei Zhang, Runxin Zhong, Tianhui Shi, Sha Liu, Weimin Zheng, Jie Tang, Hongxia Yang, Xin Liu, Jidong Zhai, Wenguang Chen
BaGuaLu: targeting brain scale pretrained models with over 37 million cores. PPoPP (2022)
Yanling Cui, Wensheng Gan, Hong Lin, Weimin Zheng
FRI-miner: fuzzy rare itemset mining. Appl. Intell. 52 (3) (2022)
Lianshan Liu, Lingzhuang Meng, Weimin Zheng, Yanjun Peng, Xiaoli Wang
A Novel High-Capacity Information Hiding Scheme Based on Improved U-Net. Secur. Commun. Networks 2022 (2022)
Tianyang Jiang, Guangyan Zhang, Zhiyue Li, Weimin Zheng
Aurogon: Taming Aborts in All Phases for Distributed In-Memory Transactions. FAST (2022)
Haipeng Ji, Weimin Zheng, Xinyi Zhuang, Zhibin Lin
Explore for a day? Generating personalized itineraries that fit spatial heterogeneity of tourist attractions. Inf. Manag. 58 (8) (2021)
Tsu-Yang Wu, Tao Wang, Yu-Qi Lee, Weimin Zheng, Saru Kumari, Sachin Kumar
Improved Authenticated Key Agreement Scheme for Fog-Driven IoT Healthcare System. Secur. Commun. Networks 2021 (2021)
Xiaqing Li, Guangyan Zhang, Weimin Zheng
SmartTuning: Selecting Hyper-Parameters of a ConvNet System for Fast Training and Small Working Memory. IEEE Trans. Parallel Distributed Syst. 32 (7) (2021)
Lei Xie, Jidong Zhai, Weimin Zheng
Mitigating Crosstalk in Quantum Computers through Commutativity-Based Instruction Reordering. DAC (2021)
Yi Luo, Kuo-Chi Chang, Jian Li, Weimin Zheng
Security Analysis of a Multi-server-Based e-Healthcare Scheme. AMLTA (2021)
Bowen Yu, Guanyu Feng, Huanqi Cao, Xiaohan Li, Zhenbo Sun, Haojie Wang, Xiaowei Zhu, Weimin Zheng, Wenguang Chen
Chukonu: A Fully-Featured Big Data Processing System by Efficiently Integrating a Native Compute Engine into Spark. Proc. VLDB Endow. 15 (4) (2021)
Jian Li, Weimin Zheng, Kuo-Chi Chang, Shuai Wang, Yi Luo
Critical Features Selection of Training Model for Intrusion Detection System. AMLTA (2021)
Zhixue Liao, Xiaozhu Zhang, Qixiao Zhang, Weimin Zheng, Wenyong Li
Rough approximation-based approach for designing a personalized tour route under a fuzzy environment. Inf. Sci. 575 (2021)
Yanling Cui, Wensheng Gan, Hong Lin, Weimin Zheng
FRI-Miner: Fuzzy Rare Itemset Mining. CoRR (2021)
Tianyang Jiang, Guangyan Zhang, Zican Huang, Xiaosong Ma, Junyu Wei, Zhiyue Li, Weimin Zheng
FusionRAID: Achieving Consistent Low Latency for Commodity SSD Arrays. FAST (2021)
Xue Li, Mingxing Zhang, Kang Chen, Yongwei Wu, Xuehai Qian, Weimin Zheng
3-D Partitioning for Large-Scale Graph Processing. IEEE Trans. Computers 70 (1) (2021)
Haojia Zuo, Bo Cao, Ying Zhao, Bilong Shen, Weimin Zheng, Yan Huang
High-capacity ride-sharing via shortest path clustering on large road networks. J. Supercomput. 77 (4) (2021)
Peng Yang, Yong Huang, Peijia Li, Siyu Liu, Quan Shan, Weimin Zheng
Trajectory Determination of Chang'E-5 during Landing and Ascending. Remote. Sens. 13 (23) (2021)
Weimin Zheng
Research trend of large-scale supercomputers and applications from the TOP500 and Gordon Bell Prize. Sci. China Inf. Sci. 63 (7) (2020)
Nan Ding, Victor W. Lee, Wei Xue, Weimin Zheng
APMT: an automatic hardware counter-based performance modeling tool for HPC applications. CCF Trans. High Perform. Comput. 2 (2) (2020)
Peng Qu, Youhui Zhang, Xiang Fei, Weimin Zheng
High Performance Simulation of Spiking Neural Network on GPGPUs. IEEE Trans. Parallel Distributed Syst. 31 (11) (2020)
Guangyan Zhang, Zhufan Wang, Xiaosong Ma, Songlin Yang, Zican Huang, Weimin Zheng
Determining Data Distribution for Large Disk Enclosures with 3-D Data Templates. ACM Trans. Storage 15 (4) (2020)
Weimin Zheng, Yanxin Li, Xiaowen Jing, Shangkun Liu
Adaptive Finite-Time Congestion Control for Uncertain TCP/AQM Network with Unknown Hysteresis. Complex. 2020 (2020)
Qing-Wei Chai, Shu-Chuan Chu, Jeng-Shyang Pan, Pei Hu, Weimin Zheng
A parallel WOA with two communication strategies applied in DV-Hop localization method. EURASIP J. Wirel. Commun. Netw. 2020 (1) (2020)
Bilong Shen, Bo Cao, Ying Zhao, Haojia Zuo, Weimin Zheng, Yan Huang
Roo: Route Planning Algorithm for Ride Sharing Systems on Large-Scale Road Networks. BigComp (2019)
Nan Ding, Wei Xue, Zhenya Song, Haohuan Fu, Shiming Xu, Weimin Zheng
An automatic performance model-based scheduling tool for coupled climate system models. J. Parallel Distributed Comput. 132 (2019)
Sheng Xu, Yongsheng Ou, Weimin Zheng
Optimal Sensor-Target Geometries for 3-D Static Target Localization Using Received-Signal-Strength Measurements. IEEE Signal Process. Lett. 26 (7) (2019)
Qing-Wei Chai, Jeng-Shyang Pan, Weimin Zheng, Shu-Chuan Chu
A Parallel Strategy Applied to APSO. ICGEC (2019)
Chengwen Wu, Guangyan Zhang, Yang Wang, Xinyang Jiang, Weimin Zheng
Redio: Accelerating Disk-Based Graph Processing by Reducing Disk I/Os. IEEE Trans. Computers 68 (3) (2019)
Xiaqing Li, Guangyan Zhang, Zhufan Wang, Weimin Zheng
HyConv: Accelerating Multi-Phase CNN Computation by Fine-Grained Policy Selection. IEEE Trans. Parallel Distributed Syst. 30 (2) (2019)
Zhiyuan Ai, Mingxing Zhang, Yongwei Wu, Xuehai Qian, Kang Chen, Weimin Zheng
Clip: A Disk I/O Focused Parallel Out-of-Core Graph Processing System. IEEE Trans. Parallel Distributed Syst. 30 (1) (2019)
Heng Lin, Xiaowei Zhu, Bowen Yu, Xiongchao Tang, Wei Xue, Wenguang Chen, Lufei Zhang, Torsten Hoefler, Xiaosong Ma, Xin Liu, Weimin Zheng, Jingfang Xu
ShenTu: processing multi-trillion edge graphs on millions of cores in seconds. SC (2018)
Bilong Shen, Xiaodan Liang, Yufeng Ouyang, Miaofeng Liu, Weimin Zheng, Kathleen M. Carley
StepDeep: A Novel Spatial-temporal Mobility Event Prediction Framework based on Deep Neural Network. KDD (2018)
Guangyan Zhang, Zican Huang, Xiaosong Ma, Songlin Yang, Zhufan Wang, Weimin Zheng
RAID+: Deterministic and Balanced Data Distribution for Large Disk Enclosures. FAST (2018)
Xiongchao Tang, Jidong Zhai, Bowen Yu, Wenguang Chen, Weimin Zheng, Keqin Li
An Efficient In-Memory Checkpoint Method and its Practice on Fault-Tolerant HPL. IEEE Trans. Parallel Distributed Syst. 29 (4) (2018)
Guangyan Zhang, Shu-han Cheng, Jiwu Shu, Qingda Hu, Weimin Zheng
Accelerating breadth-first graph search on a single server by dynamic edge trimming. J. Parallel Distributed Comput. 120 (2018)
Tsu-Yang Wu, Chien-Ming Chen, King-Hang Wang, Jeng-Shyang Pan, Weimin Zheng, Shu-Chuan Chu, John F. Roddick
Security Analysis of Rhee et al.'s Public Encryption with Keyword Search Schemes: A Review. J. Netw. Intell. 3 (1) (2018)
An Yang, Limin Sun, Zhiqiang Shi, Weimin Zheng, Yuyan Sun, Yan Hu
Sbsd: Detecting the Sequence Attack through Sensor Data in ICSs. ICC (2018)
Weimin Zheng, Weibing Yin, Ke Sun, Chun Li, Wei Jiang, Yili Xia
An Multipurpose Optimization Equivalent Filter in Hybrid Energy Storage Systems for Output Fluctuation Suppression of Photovoltaic Generation Systems. DSL (2018)
Yiru Sun, Weimin Zheng
An Identity-Based Ring Signcryption Scheme in Ideal Lattice. J. Netw. Intell. 3 (3) (2018)
Xinliang Wang, Ping Xu, Wei Xue, Yulong Ao, Chao Yang, Haohuan Fu, Lin Gan, Guangwen Yang, Weimin Zheng
A Fast Sparse Triangular Solver for Structured-grid Problems on Sunway Many-core Processor SW26010. ICPP (2018)
Mengxing Liu, Mingxing Zhang, Kang Chen, Xuehai Qian, Yongwei Wu, Weimin Zheng, Jinglei Ren
DudeTx: Durable Transactions Made Decoupled. ACM Trans. Storage 14 (1) (2018)
Feng Yi, Zhi Li, Hongtao Wang, Weimin Zheng, Limin Sun
MIAC: A Mobility Intention Auto-Completion Model for Location Prediction. KSEM (2017)
Mengxing Liu, Mingxing Zhang, Kang Chen, Xuehai Qian, Yongwei Wu, Weimin Zheng, Jinglei Ren
DudeTM: Building Durable Transactions with Decoupling for Persistent Memory. ASPLOS (2017)
Dawei Sun, Guangyan Zhang, Chengwen Wu, Keqin Li, Weimin Zheng
Building a fault tolerant framework with deadline guarantee in big data stream computing environments. J. Comput. Syst. Sci. 89 (2017)
Bilong Shen, Ying Zhao, Guoliang Li, Weimin Zheng, Yue Qin, Bo Yuan, Yongming Rao
V-Tree: Efficient kNN Search on Moving Objects with Road-Network Constraints. ICDE (2017)
Hongliang Yu, Xu Zhang, Wei Huang, Weimin Zheng
PDFS: Partially Dedupped File System for Primary Workloads. IEEE Trans. Parallel Distributed Syst. 28 (3) (2017)
Xiongchao Tang, Jidong Zhai, Bowen Yu, Wenguang Chen, Weimin Zheng
Self-Checkpoint: An In-Memory Checkpoint Method Using Less Space and Its Practice on Fault-Tolerant HPL. PPOPP (2017)
Zhiyuan Ai, Mingxing Zhang, Yongwei Wu, Xuehai Qian, Kang Chen, Weimin Zheng
Squeezing out All the Value of Loaded Data: An Out-of-core Graph Processing System with Reduced Disk I/O. USENIX Annual Technical Conference (2017)
Heng Lin, Xiongchao Tang, Bowen Yu, Youwei Zhuo, Wenguang Chen, Jidong Zhai, Wanwang Yin, Weimin Zheng
Scalable Graph Traversal on Sunway TaihuLight with Ten Million Cores. IPDPS (2017)
Pin Gao, Mingxing Zhang, Kang Chen, Yongwei Wu, Weimin Zheng
High Performance Graph Processing with Locality Oriented Design. IEEE Trans. Computers 66 (7) (2017)
Yuanfa Ji, Yuan Liu, Weimin Zheng, Xiyan Sun, Baoguo Yu
An Unambiguous Acquisition Algorithm Based on Unit Correlation for BOC(n, n) Signal. IEICE Trans. Commun. (8) (2017)
Youhui Zhang, Youyang Zhang, Yanhua Li, Xiang Fei, Weimin Zheng
In-Place Irregular Computation for Message-Passing Chip-Multiprocessors. ICPP Workshops (2017)
Weichao Guo, Kang Chen, Huan Feng, Yongwei Wu, Rui Zhang, Weimin Zheng
: Mobile Application Relaunching Speed-Up through Flash-Aware Page Swapping. IEEE Trans. Computers 65 (3) (2016)
Mingxing Zhang, Yongwei Wu, Kang Chen, Teng Ma, Weimin Zheng
Measuring and Optimizing Distributed Array Programs. Proc. VLDB Endow. 9 (12) (2016)
Mingxing Zhang, Yongwei Wu, Shan Lu, Shanxiang Qi, Jinglei Ren, Weimin Zheng
A Lightweight System for Detecting and Tolerating Concurrency Bugs. IEEE Trans. Software Eng. 42 (10) (2016)
Shuangcheng Niu, Jidong Zhai, Xiaosong Ma, Xiongchao Tang, Wenguang Chen, Weimin Zheng
Building Semi-Elastic Virtual Clusters for Cost-Effective HPC Cloud Resource Provisioning. IEEE Trans. Parallel Distributed Syst. 27 (7) (2016)
Xiaqing Li, Guangyan Zhang, H. Howie Huang, Zhufan Wang, Weimin Zheng
Performance Analysis of GPU-Based Convolutional Neural Networks. ICPP (2016)
Jidong Zhai, Wenguang Chen, Weimin Zheng, Keqin Li
Performance Prediction for Large-Scale Parallel Applications Using Representative Replay. IEEE Trans. Computers 65 (7) (2016)
Yu Ji, Youhui Zhang, Weimin Zheng
Modelling Spiking Neural Network from the Architecture Evaluation Perspective. J. Comput. Sci. Technol. 31 (1) (2016)
Mingxing Zhang, Yongwei Wu, Kang Chen, Xuehai Qian, Xue Li, Weimin Zheng
Exploring the Hidden Dimension in Graph Processing. OSDI (2016)
Chao Yang, Wei Xue, Haohuan Fu, Hongtao You, Xinliang Wang, Yulong Ao, Fangfang Liu, Lin Gan, Ping Xu, Lanning Wang, Guangwen Yang, Weimin Zheng
10M-core scalable fully-implicit solver for nonhydrostatic atmospheric dynamics. SC (2016)
Xinliang Wang, Wei Xue, Jidong Zhai, Yangtong Xu, Weimin Zheng, Hai-Xiang Lin
A Fast Tridiagonal Solver for Intel MIC Architecture. IPDPS (2016)
Youhui Zhang, Peng Qu, Cihang Jiang, Weimin Zheng
A Cloud Gaming System Based on User-Level Virtualization and Its Resource Scheduling. IEEE Trans. Parallel Distributed Syst. 27 (5) (2016)
Guangyan Zhang, Guiyong Wu, Yu Lu, Jie Wu, Weimin Zheng
Xscale: Online X-Code RAID-6 Scaling Using Lightweight Data Reorganization. IEEE Trans. Parallel Distributed Syst. 27 (12) (2016)
Shu-han Cheng, Guangyan Zhang, Jiwu Shu, Qingda Hu, Weimin Zheng
FastBFS: Fast Breadth-First Graph Search on a Single Server. IPDPS (2016)
Xiaowei Zhu, Wenguang Chen, Weimin Zheng, Xiaosong Ma
Gemini: A Computation-Centric Distributed Graph Processing System. OSDI (2016)
Jidong Zhai, Feng Zhang, Qingwen Li, Wenguang Chen, Weimin Zheng
Characterizing and optimizing TPC-C workloads on large-scale systems using SSD arrays. Sci. China Inf. Sci. 59 (9) (2016)
Yu Ji, Youhui Zhang, He Liu, Weimin Zheng
Optimized Mapping Spiking Neural Networks onto Network-on-Chip. ICA3PP (2016)
Bilong Shen, Zhaoduo Wen, Ying Zhao, Dongliang Zhou, Weimin Zheng
OCEAN: Fast Discovery of High Utility Occupancy Itemsets. PAKDD (1) (2016)
Jinlei Jiang, Xun Zhao, Yongwei Wu, Weimin Zheng
I/O-Conscious and Prediction-Enabled Virtual Machines Scheduling. CIT (2016)
Guangyan Zhang, Guiyong Wu, Shupeng Wang, Jiwu Shu, Weimin Zheng, Keqin Li
CaCo: An Efficient Cauchy Coding Approach for Cloud Storage Systems. IEEE Trans. Computers 65 (2) (2016)
Shu-han Cheng, Guangyan Zhang, Jiwu Shu, Weimin Zheng
AsyncStripe: I/O efficient asynchronous graph computing on a single server. CODES+ISSS (2016)
Guangyan Zhang, Keqin Li, Jingzhe Wang, Weimin Zheng
Accelerate RDP RAID-6 Scaling by Reducing Disk I/Os and XOR Operations. IEEE Trans. Computers 64 (1) (2015)
Dawei Sun, Guangyan Zhang, Songlin Yang, Weimin Zheng, Samee Ullah Khan, Keqin Li
Re-Stream: Real-time and energy-efficient resource scheduling in big data stream computing environments. Inf. Sci. 319 (2015)
Daokuan Ma, Yongwei Wu, Kang Chen, Weimin Zheng
Flex: Flexible and Energy Efficient Scheduling for Big Data Storage. ICPP Workshops (2015)
Cihang Jiang, Youhui Zhang, Weimin Zheng
Software-Based Lightweight Multithreading to Overlap Memory-Access Latencies of Commodity Processors. ICPP (2015)
Guangyan Zhang, Jigang Wang, Keqin Li, Jiwu Shu, Weimin Zheng
Redistribute Data to Regain Load Balance during RAID-4 Scaling. IEEE Trans. Parallel Distributed Syst. 26 (1) (2015)
Yanhua Li, Youhui Zhang, Weimin Zheng
Position-aware thread-level speculative parallelization for large-scale chip-multiprocessor. Conf. Computing Frontiers (2015)
Mingxing Zhang, Yongwei Wu, Kang Chen, Weimin Zheng
What Is Wrong with the Transmission? A Comprehensive Study on Message Passing Related Bugs. ICPP (2015)

Weimin Zheng.css-eqlu8i{font-size:small;padding-left:4px;}

Publication Activity (10 Years)

Top Topics

Top Venues

Weimin Zheng