This two-volume set of LNICST 414 and 415 constitutes the refereed post-conference proceedings of the 2^nd International Conference on IoT and Big Data Technologies for Health Care, IoTCARE 2021, which took place in October 2021. Due to COVID-19 pandemic the conference was held virtually.

The 79 revised full papers were carefully reviewed and selected from 165 submissions. The papers are arranged thematically as follows: Integrating healthcare with IoT; Information fusion for the devices of IoT; AI-based internet of medical things.

Research on the universal access security authentication technology of multi-source heterogeneous terminal communication module

Research on Intelligent Operation and Maintenance Technology of Pumped Storage Power Plant Based on 5G
Smart Grid Service Transmission Accuracy Optimization Technology Based on 5G Technology
Research on Hybrid Communication Networking Protocol Optimization Technology of Ubiquitous Electric Internet of Things
Forecasting method of monthly clearing price under the background of continuous adjustment of power market supply and demand
Automatic response method of grid demand under the background of new energy consumption
Effect evaluation of College English blended teaching based on factor analysis and association rules
Design of golfer's heart rate data transmission system based on machine learning
Design of healthcare data analysis system based on operational research and differential evolution algorithm
Research on reliability evaluation of intelligent energy integrated service platform based on hierarchical linear model
Design of clinical medical data monitoring system based on artificial intelligence and big data
Construction of pediatric medication data security cloud storage model based on Internet of things technology
Mathematical model of data partition storage in Network Center Based on blockchain
Enterprise Cluster Intelligent Manufacturing Information Management System Based On Wireless Communication Technology
3D-HEVC deep video information hiding and secure transmission method
Research on difference elimination method between small sample databases based on feature extraction
Research on Homomorphic Retrieval Method of Private Database Secrets in Multi-server Environmen
Low-frequency noise characteristic extraction method of electronic components based on data mining
X-band radar detection target tracking method based on Internet of things sensing technology
Research on hybrid encryption of cross border e-commerce transaction information based on B+ search tree algorithm
Research on fuzzy retrieval method of blockchain information based on B+tree index structure
Reliability analysis method of multi area fault diagnosis and location in power grid with missing information
Reliability analysis of real time operation state of power system based on K-nearest neighbor
Low resolution license plate recognition based on intelligent data processing and prediction algorithm
Design and application of security monitoring system for perception terminal of power Internet of things
Reliability evaluation model of online teaching quality based on big data technology
Reliability detection method of online education resource sharing based on blockchain
Research on inventory control method of cold chain logistics enterprises under the background of new energy consumption
Fault detection method of electronic circuit converter based on dynamic sequence response
Reliability analysis of power side information acquisition model based on wireless sensor
Research on Obstacle Avoidance Tracking Planning of Hyper-redundant Manipulator Based on VR Technology
High voltage cable shield voltage monitoring method considering coil flu
construction cost over budget control system based on BIM Technology
Cluster evaluation method of building decoration cost rationality based on BIM model
Power frequency control method of electrical equipment under Internet of things technology
PID based automotive electronically controlled power steering system in the Internet of things environment
Research on Debounce Method of Electronic Imaging Equipment Based on Feature Point Matching
 An incomplete license plate image intelligent recognition system based on the generated counter network
Data transmission reliability detection of hybrid information system based on smart contract
Research on Network Security Authentication Method Based on Data Mining Technolo