Xianshou Ren

• Northeastern University

Human Activity Recognition In article number 2200204, Yuliang Zhao, Chao Lian, Wen Jung Li and co-workers propose a smart ring to monitor human daily activities driven by a hierarchical decision algorithm. With this portable, reliable, and high-accuracy human activity recognition solution, users only need to wear the ring on the index finger, and t...

Statistical analysis of human daily activities contributes to time planning and health management. It also helps people make healthcare judgments and disease predictions when combined with big data technology. However, traditional methods for recognition of human daily activities based on vision and multisensors have limitations due to poor portabi...

Enabling a single ring to recognize 3D keystrokes is a daunting challenge, especially for real-time keystrokes recognition. In this work, we integrated edge computing and machine learning algorithms into a microcontroller unit (MCU) of a smart ring so that keystrokes motion can be accurately recognized in real-time. We developed a multi-level decis...

Virtual keyboards could potentially replace traditional physical keyboards for text input and human-computer-interface due to their portability and comfortable usage characteristics. However, typical virtual keyboards such as wearable keyboards and camera-based keyboards have unsatisfactory input recognition accuracy, and hence, preventing them fro...

The quantitative evaluation of sports motions is a precondition for scientific training and data-driven professional athletic motion analyses. However, the high accuracy and the portability of the evaluation schemes are contradictory and it is difficult to simultaneously improve both metrics in one device. In this work, we propose an effective gymn...

The traditional mouse has been used as a main tool for human-computer interaction for more than 50 years. However, it has become unable to cater to people’s need for mobile officing and all-weather use due to its reliance on the support of a two-dimensional plane, poor portability, wearisomeness, and other problems. In this paper, we propose a port...

In table tennis, a 40 mm in diameter table tennis ball weighing 2.7g can reach the opponent’s table in a very short time when it travels at a speed of 17m/s. That is difficult for new players to hit accurately. The purpose of this work is to recognize hits and misses by distinguishing the action difference between hitting and missing table tennis....

In this paper, we present an improved ring-type virtual keyboard scheme that can achieve impressive performance with only one smart ring on a finger of each hand. The smart ring integrates a 6-DoF Inertial Measurement Unit (IMU) and a 3-DoF magnetometer sensor for collecting motion data during typing. First, a new keyboard layout is designed, by ch...