251 research outputs found
The impact of government ownership on performance: Evidence from major Chinese banks
Chinese banking system plays increasingly more important role in the word financial system and has attracted a lot of attention during recent years. The purpose of this paper is to study and analyze the relationship between government ownership and major Chinese banksā performance.Our paper studies the sample data collected during the period between 2000 and 2011, and regression analysis is conducted for the purpose of examining how the government ownership change would impact the bank performance. As indicated by previous literature about bank performance, bank performance is often affected by bank size, capital ratio and net interest margin (NIM). Our results show that decreased government ownership can improve major Chinese banksā performance
Intelligent Communication Planning for Constrained Environmental IoT Sensing with Reinforcement Learning
Internet of Things (IoT) technologies have enabled numerous data-driven
mobile applications and have the potential to significantly improve
environmental monitoring and hazard warnings through the deployment of a
network of IoT sensors. However, these IoT devices are often power-constrained
and utilize wireless communication schemes with limited bandwidth. Such power
constraints limit the amount of information each device can share across the
network, while bandwidth limitations hinder sensors' coordination of their
transmissions. In this work, we formulate the communication planning problem of
IoT sensors that track the state of the environment. We seek to optimize
sensors' decisions in collecting environmental data under stringent resource
constraints. We propose a multi-agent reinforcement learning (MARL) method to
find the optimal communication policies for each sensor that maximize the
tracking accuracy subject to the power and bandwidth limitations. MARL learns
and exploits the spatial-temporal correlation of the environmental data at each
sensor's location to reduce the redundant reports from the sensors. Experiments
on wildfire spread with LoRA wireless network simulators show that our MARL
method can learn to balance the need to collect enough data to predict wildfire
spread with unknown bandwidth limitations.Comment: To be published in the 20th Annual IEEE International Conference on
Sensing, Communication, and Networking (SECON 2023
Time-resolved early-to-late Gadolinium enhancement MRI using single breath-hold 3D spiral imaging
Rapid evaluation of right ventricular volume and mass without breath-holding using real-time interactive cardiac magnetic resonance imaging system
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Homoepitaxial Growth of Single Crystal Diamond Membranes for Quantum Information Processing
Fabrication of devices designed to fully harness the unique properties of quantum mechanics through their coupling to quantum bits (qubits) is a prominent goal in the field of quantum information processing (QIP). Among various qubit candidates, nitrogen vacancy (NV) centers in diamond have recently emerged as an outstanding platform for room temperature QIP. However, formidable challenges still remain in processing diamond and in the fabrication of thin diamond membranes, which are necessary for planar photonic device engineering. Here we demonstrate epitaxial growth of single crystal diamond membranes using a conventional microwave chemical vapor deposition (CVD) technique. The grown membranes, only a few hundred nanometers thick, show bright luminescence, excellent Raman signature and good NV center electronic spin coherence times. Microdisk cavities fabricated from these membranes exhibit quality factors of up to 3000, overlapping with NV center emission. Our methodology offers a scalable approach for diamond device fabrication for photonics, spintronics, optomechanics and sensing applications.Engineering and Applied Science
The Influence of Large Scale Phosphate Mining on the Water Quality of the Huangbaihe River Basin in China: Dominant Pollutants and Spatial Distributions
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