Zhigang Li

This page is a disambiguation page, it actually contains mutiple papers from persons of the same or a similar name.

Bibliography

2022
Open-Circuit Fault Diagnosis of NPC Inverter Based on Improved 1-D CNN Network.
IEEE Trans. Instrum. Meas., 2022

Recognition of Upper Limb Action Intention Based on IMU.
Sensors, 2022

The Short-Arc Precise Orbit Determination of GEO Satellites Using VLBI and Transfer Ranging.
Remote. Sens., 2022

A Method for Measuring the Group Delay of an On-Orbit Satellite Transponder.
IEEE Instrum. Meas. Mag., 2022

Quantification and statistical analysis on the cranial vault morphology for Chinese children 3-10 years old.
Comput. Methods Programs Biomed., 2022

Learning-by-Teaching in CS Education: A Systematic Review.
Proceedings of the 55th Hawaii International Conference on System Sciences, 2022

2021
PDRS: A Fast Non-Iterative Scheme for Massive Grant-Free Access in Massive MIMO.
IEEE Wirel. Commun. Lett., 2021

Cellular Traffic Prediction via a Deep Multi-Reservoir Regression Learning Network for Multi-Access Edge Computing.
IEEE Wirel. Commun., 2021

A Lightweight and Secure Anonymous User Authentication Protocol for Wireless Body Area Networks.
Secur. Commun. Networks, 2021

Intrusion Detection Method Based on Adaptive Clonal Genetic Algorithm and Backpropagation Neural Network.
Secur. Commun. Networks, 2021

Smoke Detection from Himawari-8 Satellite Data over Kalimantan Island Using Multilayer Perceptrons.
Remote. Sens., 2021

Novel Solutions to NOMA-Based Modern Random Access for 6G-Enabled IoT.
IEEE Internet Things J., 2021

An asymmetric group key agreement protocol based on attribute threshold for Internet of Things.
Trans. Emerg. Telecommun. Technol., 2021

Based investigate of beehive sound to detect air pollutants by machine learning.
Ecol. Informatics, 2021

Real-time Dispatchable Region of Active Distribution Networks Based on a Tight Convex Relaxation Model.
CoRR, 2021

Contention-based Grant-free Transmission with Extremely Sparse Orthogonal Pilot Scheme.
CoRR, 2021

ECG Heartbeat Classification Based on an Improved ResNet-18 Model.
Comput. Math. Methods Medicine, 2021

Joint latent low-rank and non-negative induced sparse representation for face recognition.
Appl. Intell., 2021

Research on Evaluation Method of Time Transfer Performance Between Ground Stations in Two-Way Satellite Comparison Network.
IEEE Access, 2021

Adaptive Critic Design-Based Robust Cooperative Tracking Control for Nonlinear Multi-Agent Systems With Disturbances.
IEEE Access, 2021

Optimizing AD Pruning of Sponsored Search with Reinforcement Learning.
Proceedings of the Companion of The Web Conference 2021, 2021

Contention-based Grant-free Transmission with Extremely Sparse Orthogonal Pilot Scheme.
Proceedings of the 94th IEEE Vehicular Technology Conference, 2021

A Computer-Vision Based Engagement Evaluation System for More Effective Learning Design.
Proceedings of the SIGITE '21: The 22nd Annual Conference on Information Technology Education, SnowBird, UT, USA, October 6, 2021

Irregular Superimposed Multi-pilot for Grant-free Massive MIMO.
Proceedings of the 32nd IEEE Annual International Symposium on Personal, 2021

A Hierarchical Reinforcement Learning Based Optimization Framework for Large-scale Dynamic Pickup and Delivery Problems.
Proceedings of the Advances in Neural Information Processing Systems 34: Annual Conference on Neural Information Processing Systems 2021, 2021

Teaching Reform and Research of Data Structure Course Based on BOPPPS Model and Rain Classroom.
Proceedings of the Data Science, 2021

Temporal Smoothness Framework: Analyzing and Exploring Evolutionary Transition Behavior in Dynamic Networks.
Proceedings of the 33rd IEEE International Conference on Tools with Artificial Intelligence, 2021

The Teaching Reform and Research of C Programming Course Based on BOPPPS Model and Rain Classroom.
Proceedings of the ICISCAE 2021: 4th International Conference on Information Systems and Computer Aided Education, Dalian, China, September 24, 2021

Application of Augmented Reality in the Medicine Packaging Box.
Proceedings of the ICISCAE 2021: 4th International Conference on Information Systems and Computer Aided Education, Dalian, China, September 24, 2021

Grant-Free Data-only Transmission with Correlated Antenna Array.
Proceedings of the IEEE Globecom 2021 Workshops, Madrid, Spain, December 7-11, 2021, 2021

SD-Pose: Semantic Decomposition for Cross-Domain 6D Object Pose Estimation.
Proceedings of the Thirty-Fifth AAAI Conference on Artificial Intelligence, 2021

2020
Smoothing-Aided Support Vector Machine Based Nonstationary Video Traffic Prediction Towards B5G Networks.
IEEE Trans. Veh. Technol., 2020

Generalized Fault-Tolerance Topology Generation for Application-Specific Network-on-Chips.
IEEE Trans. Comput. Aided Des. Integr. Circuits Syst., 2020

An improved model for dependent competing risks considering continuous degradation and random shocks.
Reliab. Eng. Syst. Saf., 2020

A general discrete degradation model with fatal shocks and age- and state-dependent nonfatal shocks.
Reliab. Eng. Syst. Saf., 2020

Enhanced Echo-State Restricted Boltzmann Machines for Network Traffic Prediction.
IEEE Internet Things J., 2020

Toward Self-Adaptive Selection of Kernel Functions for Support Vector Regression in IoT-Based Marine Data Prediction.
IEEE Internet Things J., 2020

Recurrence Behavior Statistics of Blast Furnace Gas Sensor Data in Industrial Internet of Things.
IEEE Internet Things J., 2020

Similarity Analysis of Learning Interests among Majors Using Complex Networks.
Inf., 2020

Machine Learning-Based Coding Decision Making in H.265/HEVC CTU Division and Intra Prediction.
Int. J. Mob. Comput. Multim. Commun., 2020

Observer-Based Adaptive Fuzzy Tracking Control for a Class of Strict-Feedback Systems with Event-Triggered Strategy and Tan-type Barrier Lyapunov Function.
Int. J. Fuzzy Syst., 2020

Robust RGB-based 6-DoF Pose Estimation without Real Pose Annotations.
CoRR, 2020

Anisotropic and strain rate-dependent mechanical properties and constitutive modeling of the cancellous bone from piglet cervical vertebrae.
Comput. Methods Programs Biomed., 2020

Development, validation, and application of ligamentous cervical spinal segment C6-C7 of a six-year-old child and an adult.
Comput. Methods Programs Biomed., 2020

Research of Low-Rank Representation and Discriminant Correlation Analysis for Alzheimer's Disease Diagnosis.
Comput. Math. Methods Medicine, 2020

Comfort and health evaluation of live mutton sheep during the transportation based on wearable multi-sensor system.
Comput. Electron. Agric., 2020

Identification of microbial interaction network: zero-inflated latent Ising model based approach.
BioData Min., 2020

Multivariate Seawater Quality Prediction Based on PCA-RVM Supported by Edge Computing Towards Smart Ocean.
IEEE Access, 2020

Smoothed Deep Neural Networks for Marine Sensor Data Prediction.
IEEE Access, 2020

Contention-based Grant-free Transmission with Independent Multi-pilot Scheme.
Proceedings of the 92nd IEEE Vehicular Technology Conference, 2020

Fast Power Reconstruction for User Detection of Autonomous Grant-free Data-only Schemes.
Proceedings of the 92nd IEEE Vehicular Technology Conference, 2020

Modulation Classification Method based on Deep Learning under Non-Gaussian Noise.
Proceedings of the 91st IEEE Vehicular Technology Conference, 2020

A Theory-Based Course Development Framework: A Case Study.
Proceedings of the SIGITE '20: The 21st Annual Conference on Information Technology Education, 2020

Converting Handwritten Text to Editable Format via Gesture Recognition for Education.
Proceedings of the 51st ACM Technical Symposium on Computer Science Education, 2020

Lightweight and Instant Access Technologies and Protocols to Boost Digital Transformations.
Proceedings of the 2020 ITU Kaleidoscope: Industry-Driven Digital Transformation, 2020

Adversarial Mutual Information Learning for Network Embedding.
Proceedings of the Twenty-Ninth International Joint Conference on Artificial Intelligence, 2020

Analysis of Topological Relationships of Human.
Proceedings of the Intelligent Human Systems Integration 2020, 2020

Pose-guided Auto-Encoder and Feature-Based Refinement for 6-DoF Object Pose Regression.
Proceedings of the 2020 IEEE International Conference on Robotics and Automation, 2020

Job Insecurity and Daily Emotional Exhaustion: An Experience Sampling Method Approach.
Proceedings of the ICMSS 2020: 2020 4th International Conference on Management Engineering, 2020

Research on Software Resource Management Model Based on Cloud Service.
Proceedings of the ICIT 2020, 2020

Towards High-efficient QoT Prediction of Wide-area Optical Backbone Network: A Reservoir Computing View.
Proceedings of the 9th IEEE/CIC International Conference on Communications in China, 2020

A Stacking Ensemble Learning Model for Mobile Traffic Prediction.
Proceedings of the 9th IEEE/CIC International Conference on Communications in China, 2020

Autonomous Grant-Free High Overloading Multiple Access Based on Conjugated Data Symbols.
Proceedings of the 2020 IEEE International Conference on Communications Workshops, 2020

A Data-assisted Algorithm for Truly Grant-free Transmissions of Future mMTC.
Proceedings of the IEEE Global Communications Conference, 2020

PFRL: Pose-Free Reinforcement Learning for 6D Pose Estimation.
Proceedings of the 2020 IEEE/CVF Conference on Computer Vision and Pattern Recognition, 2020

Image Classification and Detection of Cigarette Combustion Cone Based on Inception Resnet V2.
Proceedings of the 5th International Conference on Computer and Communication Systems, 2020

Collaborative Learning for Information Security Topics: A Pilot Study.
Proceedings of the 26th Americas Conference on Information Systems, 2020

Effects of and Defenses Against Adversarial Attacks on a Traffic Light Classification CNN.
Proceedings of the 2020 ACM Southeast Conference, 2020

2019
Access Control Based on Ciphertext Attribute Authentication and Threshold Policy for the Internet of Things.
Sensors, 2019

The impact of mobility, risk, and cost on the users' intention to adopt mobile payments.
Inf. Syst. E Bus. Manag., 2019

Interval prediction of oscillating time series based on grey system modelling.
Int. J. Model. Identif. Control., 2019

Physical layer security in massive internet of things: delay and security analysis.
IET Commun., 2019

Optimisation of convergence-aware coded PDMA for 5G wireless systems.
IET Commun., 2019

Extreme learning machine optimized by whale optimization algorithm using insulated gate bipolar transistor module aging degree evaluation.
Expert Syst. Appl., 2019

An end-to-end Generative Retrieval Method for Sponsored Search Engine -Decoding Efficiently into a Closed Target Domain.
CoRR, 2019

Simplified Estimation of Junction Temperature Fluctuation at the Fundamental Frequency for IGBT Modules Considering Mission Profile.
IEEE Access, 2019

Collective Efficacy of Support Vector Regression With Smoothness Priority in Marine Sensor Data Prediction.
IEEE Access, 2019

Monocular Viewpoints Estimation for Generic Objects in the Wild.
IEEE Access, 2019

Machine Learning Based Dynamic Correlation on Marine Environmental Data Using Cross-Recurrence Strategy.
IEEE Access, 2019

Underwater Loop-Closure Detection for Mechanical Scanning Imaging Sonar by Filtering the Similarity Matrix With Probability Hypothesis Density Filter.
IEEE Access, 2019

Practice What You Preach - Building a Capstone Management System as Undergraduate IT Capstone Projects.
Proceedings of the 20th Annual SIG Conference on Information Technology Education, 2019

Untampered Electronic Voting in Entertainment Industry: A Blockchain-based Implementation.
Proceedings of the 20th Annual SIG Conference on Information Technology Education, 2019

Understand the Emerging Demands of Computing Education for Non-CS Major Students.
Proceedings of the 50th ACM Technical Symposium on Computer Science Education, 2019

Simulation of Flooding Phenomenon in Packed Column using Electrical Capacitance Tomography.
Proceedings of the 2019 IEEE International Conference on Imaging Systems and Techniques, 2019

Adversarial Capsule Learning for Network Embedding.
Proceedings of the 31st IEEE International Conference on Tools with Artificial Intelligence, 2019

Data-Driven Hospital Surgery Scheduling Optimization.
Proceedings of the Smart Health - International Conference, 2019

CDPN: Coordinates-Based Disentangled Pose Network for Real-Time RGB-Based 6-DoF Object Pose Estimation.
Proceedings of the 2019 IEEE/CVF International Conference on Computer Vision, 2019

ElaX: Provisioning Resource Elastically for Containerized Online Cloud Services.
Proceedings of the 21st IEEE International Conference on High Performance Computing and Communications; 17th IEEE International Conference on Smart City; 5th IEEE International Conference on Data Science and Systems, 2019

Finding a Niche and Developing an Undergraduate Data Analytics Course.
Proceedings of the IEEE Frontiers in Education Conference, 2019

What are the Non-majors Looking for in CS Classes?
Proceedings of the IEEE Frontiers in Education Conference, 2019

Instance Segmentation of Anatomical Structures in Chest Radiographs.
Proceedings of the 32nd IEEE International Symposium on Computer-Based Medical Systems, 2019

Adaptive Sliding Mode Control of Projectile Transfer Manipulator Based on Double Power Approach Law.
Proceedings of the 2019 4th International Conference on Automation, 2019

A 0.0558-mm<sup>2</sup> 0.05-0.9GHz Low-Power Multi-phase Non-overlap Clock Generator in 40 nm CMOS.
Proceedings of the 13th IEEE International Conference on ASIC, 2019

2018
Lagrangian relaxation-based routing path allocation for application-specific network-on-chips.
Integr., 2018

A stress Detection method for Reinforced Concrete Structure based on metal magnetic Memory.
Int. J. Robotics Autom., 2018

Stochastic Block-Coordinate Gradient Projection Algorithms for Submodular Maximization.
Complex., 2018

Development of a child head analytical dynamic model considering cranial nonuniform thickness and curvature - Applying to children aged 0-1 years old.
Comput. Methods Programs Biomed., 2018

A Novel Blockchain-based Education Records Verification Solution.
Proceedings of the 19th Annual SIG Conference on Information Technology Education, 2018

Multidisciplinary model of a certain ammunition manipulator and analysis of its motion characteristics under uncertain factors.
Proceedings of the IEEE International Conference on Information and Automation, 2018

2017
Output Constraint Transfer for Kernelized Correlation Filter in Tracking.
IEEE Trans. Syst. Man Cybern. Syst., 2017

Adaptive Local Movement Modeling for Robust Object Tracking.
IEEE Trans. Circuits Syst. Video Technol., 2017

System Reliability Analysis Method Based on Fuzzy Probability.
Int. J. Fuzzy Syst., 2017

Generate Identity-Preserving Faces by Generative Adversarial Networks.
CoRR, 2017

A Distributed Intrusion Detection System for Cognitive Radio Networks Based on Evidence Theory.
Proceedings of the 2017 IEEE International Conference on Software Quality, 2017

Visualization of latent fingerprints beneath opaque electrical tapes by optical coherence tomography.
Proceedings of the MIPPR 2017: Remote Sensing Image Processing, 2017

Fault Diagnosis and Monitoring Device Design for the Electrical Life Test of Low Voltage Circuit Breaker.
Proceedings of the IoT as a Service - Third International Conference, 2017

Digital Modulation and FPGA Implementation of MSK Based on SDR.
Proceedings of the Communications, Signal Processing, and Systems, 2017

Rainfall Attenuation Characteristic Analysis in Ka-band Satellite Communication System.
Proceedings of the Communications, Signal Processing, and Systems, 2017

Research on Threshold Selection Algorithm for Adaptive Modulation and Coding Scheme.
Proceedings of the Communications, Signal Processing, and Systems, 2017

Integer linear programming based fault-tolerant topology synthesis for application-specific NoC.
Proceedings of the 12th IEEE International Conference on ASIC, 2017

2016
Sentiment classification technology based on Markov logic networks.
New Rev. Hypermedia Multim., 2016

The effect of electro-thermal parameters on IGBT junction temperature with the aging of module.
Microelectron. Reliab., 2016

移动群智网中基于人群搜索优化和协作竞争的用户激励机制 (User Incentive Mechanism Based on Crowd Search Optimization and Cooperative Competition for Mobile Crowd Sensing Networks).
计算机科学, 2016

Bounding Multiple Gaussians Uncertainty with Application to Object Tracking.
Int. J. Comput. Vis., 2016

A Novel Approach for Diagnosis of Analog Circuit Fault by Using GMKL-SVM and PSO.
J. Electron. Test., 2016

Multi-Period Do-Not-Exceed Limit for Variable Renewable Generation Dispatch Considering Discrete Recourse Controls.
CoRR, 2016

Data-Driven Real-Time Power Dispatch for Maximizing Variable Renewable Generation.
CoRR, 2016

Effect of high pressure water jet cleaning device on the motion stability of an in-pipe cleaning robot.
Proceedings of the 2016 IEEE International Conference on Robotics and Biomimetics, 2016

Improved face recognition result reranking based on shape contexts.
Proceedings of the 2016 International Conference on Intelligent Information Processing, 2016

Scale Invariant Kernelized Correlation Filter Based on Gaussian Output.
Proceedings of the Cloud Computing and Security - Second International Conference, 2016

2015
An Independent Filter for Gene Set Testing Based on Spectral Enrichment.
IEEE ACM Trans. Comput. Biol. Bioinform., 2015

Fault detection in analog and mixed-signal circuits by using Hilbert-Huang transform and coherence analysis.
Microelectron. J., 2015

Cellular Traffic Offloading through Opportunistic Communications Based on Human Mobility.
KSII Trans. Internet Inf. Syst., 2015

A compressed sensing ensemble classifier with application to human detection.
Neurocomputing, 2015

Dynamic load balancing technology for cloud-oriented CDN.
Comput. Sci. Inf. Syst., 2015

Spectral gene set enrichment (SGSE).
BMC Bioinform., 2015

Principal component gene set enrichment (PCGSE).
BioData Min., 2015

Adaptive Local Movement Modelling for Object Tracking.
Proceedings of the 2015 IEEE Winter Conference on Applications of Computer Vision, 2015

Quantitative analysis of glucose in whole blood based on FT-Raman spectroscopy and back propagation artificial neural network.
Proceedings of the IEEE 7th International Conference on Awareness Science and Technology, 2015

Lagrangian relaxation based topology synthesis for Application-Specific Network-on-Chips.
Proceedings of the 2015 IEEE 11th International Conference on ASIC, 2015

2014
On Nonuniform Polynomial Trichotomy of Linear Discrete-Time Systems in Banach Spaces.
J. Appl. Math., 2014

D&S Barcode: A Dynamic and Sensitive Barcode for Intelligent Environment Monitoring.
Proceedings of the 2014 International Conference on Intelligent Environments, Shanghai, China, June 30, 2014

2013
Analysis of the Deadbeat Control Algorithm for Photovoltaic Grid Connected Inverter Output Current.
Int. J. Online Biomed. Eng., 2013

A Balance Storage Nodes Assignment for Wireless Sensor Networks.
Proceedings of the Wireless Algorithms, Systems, and Applications, 2013

Designing Baiguo Landslide Disaster Monitoring and Pre-warning System Based on GIS.
Proceedings of the Geo-Informatics in Resource Management and Sustainable Ecosystem, 2013

2012
Research on the walkthrough engine for virtual environment.
Proceedings of the IEEE 16th International Conference on Computer Supported Cooperative Work in Design, 2012

Deterministic secure quantum communication with mutual authentication based on bell measurement.
Proceedings of the IEEE Congress on Evolutionary Computation, 2012

Spectral domain optical coherence tomography for imaging human skin in vivo.
Proceedings of 2012 IEEE-EMBS International Conference on Biomedical and Health Informatics, 2012

2011
Capability information: A cost-effective information model for multi-hop routing of wireless ad hoc networks in the real environment.
J. Parallel Distributed Comput., 2011

Pilot Design Based on Distributed Transmit Antennas in V-BLAST for Full Frequency Reuse.
Proceedings of the Wireless Internet - 6th International ICST Conference, 2011

Research and Demonstration of Agricultural Policy Simulation based on CGE Model.
Proceedings of the ICEIS 2011, 2011

Multi-resolution Mesh Fitting by B-spline Surfaces for Reverse Engineering.
Proceedings of the 12th International Conference on Computer-Aided Design and Computer Graphics, 2011

2010
Weak Greedy Routing over Graph Embedding for Wireless Sensor Networks.
Wirel. Sens. Netw., 2010

A new data normalization method for unsupervised anomaly intrusion detection.
J. Zhejiang Univ. Sci. C, 2010

Flexible ILC based intelligent prosthesis expert control system.
Proceedings of the 2010 IEEE International Conference on Robotics and Biomimetics, 2010

CR: Capability Information for Routing of Wireless Ad Hoc Networks in the Real Environment.
Proceedings of the Fifth International Conference on Networking, Architecture, and Storage, 2010

A Research to Construct the Interactive Platform for Integrated Information of Agricultural Products in China Xinjiang.
Proceedings of the Computer and Computing Technologies in Agriculture IV, 2010

Research on Information Sharing Pattern of Agricultural Products Supply Chain Based on E-Commerce Technology.
Proceedings of the Computer and Computing Technologies in Agriculture IV, 2010

Creating fuzzy control rules based on data mining.
Proceedings of the Sixth International Conference on Natural Computation, 2010

Shortages of the Traditional Calculation of Interference Intensity of the Control Rules.
Proceedings of the Information Computing and Applications - First International Conference, 2010

2009
A simple prediction method for composite rectangular microcantilevers with equal width and the dimensional optimization.
Microelectron. J., 2009

Research on the resonant frequency formula of V-shaped cantilevers.
Proceedings of the 4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, 2009

The Method of Knowledge Processing in Intelligent Design System of Products.
Proceedings of the Advances in Computation and Intelligence, 4th International Symposium, 2009

Contour-cast: Location-free Data Dissemination and Discovery for Wireless Sensor Networks.
Proceedings of the 15th IEEE International Conference on Parallel and Distributed Systems, 2009

Reliability Analysis of Low-voltage Electrical Appliance Based on Gray Theory.
Proceedings of the Sixth International Conference on Fuzzy Systems and Knowledge Discovery, 2009

A Comprehensive Evaluation Approach Based on Fuzzy Theory and Evidential Theory.
Proceedings of the Sixth International Conference on Fuzzy Systems and Knowledge Discovery, 2009

Computation of Fuzzy Reliability in the Case of Fuzzy Stress and Fuzzy Strength.
Proceedings of the Sixth International Conference on Fuzzy Systems and Knowledge Discovery, 2009

2008
Affective Model for Intelligent Virtual Agent Based on PFCM.
Int. J. Virtual Real., 2008

Some Davenport Constants with Weights and Adhikari and Rath's Conjecture.
Ars Comb., 2008

Bouncing Tracks in Sensor Networks.
Proceedings of the 14th International Conference on Parallel and Distributed Systems, 2008

A New Clustering Analysis Used for Generating Fuzzy Control Rules.
Proceedings of the Fifth International Conference on Fuzzy Systems and Knowledge Discovery, 2008

2007
Application and Research on Affection Model Based on Bayesian Network.
Proceedings of the Entertainment Computing, 2007

Model Analysis of Data Integration of Enterprises and E-Commerce Based on ODS.
Proceedings of the Research and Practical Issues of Enterprise Information Systems II, 2007

2006
An Algorithm of General Closeness Degree Based on Evidence Theory and Its Applications in Fuzzy Pattern Recognition.
Proceedings of the Ninth International Conference on Control, 2006

2005
An Efficient and Divisible Payment Scheme for M-Commerce.
Proceedings of the Knowledge-Based Intelligent Information and Engineering Systems, 2005

Extended Application of Scalable Video Coding Methods.
Proceedings of the Image Analysis and Recognition, Second International Conference, 2005

2004
Real-time streaming and robust streaming H.264/AVC video.
Proceedings of the Third International Conference on Image and Graphics, 2004

2001
Two-way satellite time and frequency transfer networks in Pacific Rim region.
IEEE Trans. Instrum. Meas., 2001

1999
A multi-agent model and its speech act theory for cooperative mechanical CAD.
J. Intell. Manuf., 1999

The Design and Implementation of an Object Oriented Database Management System-OMNIX.
Proceedings of the TOOLS 1999: 31st International Conference on Technology of Object-Oriented Languages and Systems, 1999


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