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With their high-fidelity scene representation capability, the attention of SLAM field is deeply attracted by the Neural Radiation Field (NeRF) and 3D Gaussian Splatting (3DGS). Recently, there has been a surge in NeRF-based SLAM, while 3DGS-based SLAM is sparse. A novel 3DGS-based SLAM approach with a fusion of deep visual feature, dual keyframe selection and 3DGS is presented in this paper. Compared with the existing methods, the proposed tracking is achieved by feature extraction and motion filter on each frame. The joint optimization of poses and 3D Gaussians runs through the entire mapping process. Additionally, the coarse-to-fine pose estimation and compact Gaussian scene representation are implemented by dual keyframe selection and novel loss functions. Experimental results demonstrate that the proposed algorithm not only outperforms the existing methods in tracking and mapping, but also has less memory usage.

Industrial Cyber-Physical Systems (ICPS) integrate the disciplines of computer science, communication technology, and engineering, and have emerged as integral components of contemporary manufacturing and industries. However, ICPS encounters various challenges in long-term operation, including equipment failures, performance degradation, and security threats. To achieve efficient maintenance and management, prognostics and health management (PHM) finds widespread application in ICPS for critical tasks, including failure prediction, health monitoring, and maintenance decision-making. The emergence of large-scale foundation models (LFMs) like BERT and GPT signifies a significant advancement in AI technology, and ChatGPT stands as a remarkable accomplishment within this research paradigm, harboring potential for General Artificial Intelligence. Considering the ongoing enhancement in data acquisition technology and data processing capability, LFMs are anticipated to assume a crucial role in the PHM domain of ICPS. However, at present, a consensus is lacking regarding the application of LFMs to PHM in ICPS, necessitating systematic reviews and roadmaps to elucidate future directions. To bridge this gap, this paper elucidates the key components and recent advances in the underlying model.A comprehensive examination and comprehension of the latest advances in grand modeling for PHM in ICPS can offer valuable references for decision makers and researchers in the industrial field while facilitating further enhancements in the reliability, availability, and safety of ICPS., Comment: Authors of the paper to be re-established

The purpose of our wind turbine blade design research is to find the most efficient blade shape for power production. Our plan was to first study the size and structure of existing blades, then use the AutoDesk Inventor 3D program to design a suitable blade profile. After 3D printing the desired blade profile it would be tested using the existing wind turbine simulation equipment in the lab. The Inventor software allowed us to model, and repeatedly debug, to ensure that it our mount fit into the hub of the turbine holding the fixed blade. After repeated changes, the printer finally produced three sets of fan blades of different shapes. The wind simulation equipment still must be used be to complete our testing. By adjusting the wind speed and measuring the recorded output power, it will eventually be converted into an experimental model: a certain shape of blade generates higher electrical power.

The purpose of our wind turbine blade design research is to find the most efficient blade shape for power production. Our plan was to first study the size and structure of existing blades, then use the AutoDesk Inventor 3D program to design a suitable blade profile. After 3D printing the desired blade profile it would be tested using the existing wind turbine simulation equipment in the lab. The Inventor software allowed us to model, and repeatedly debug, to ensure that it our mount fit into the hub of the turbine holding the fixed blade. After repeated changes, the printer finally produced three sets of fan blades of different shapes. The wind simulation equipment still must be used be to complete our testing. By adjusting the wind speed and measuring the recorded output power, it will eventually be converted into an experimental model: a certain shape of blade generates higher electrical power.

The purpose of our wind turbine blade design research is to find the most efficient blade shape for power production. Our plan was to first study the size and structure of existing blades, then use the AutoDesk Inventor 3D program to design a suitable blade profile. After 3D printing the desired blade profile it would be tested using the existing wind turbine simulation equipment in the lab. The Inventor software allowed us to model, and repeatedly debug, to ensure that it our mount fit into the hub of the turbine holding the fixed blade. After repeated changes, the printer finally produced three sets of fan blades of different shapes. The wind simulation equipment still must be used be to complete our testing. By adjusting the wind speed and measuring the recorded output power, it will eventually be converted into an experimental model: a certain shape of blade generates higher electrical power.

The purpose of our wind turbine blade design research is to find the most efficient blade shape for power production. Our plan was to first study the size and structure of existing blades, then use the AutoDesk Inventor 3D program to design a suitable blade profile. After 3D printing the desired blade profile it would be tested using the existing wind turbine simulation equipment in the lab. The Inventor software allowed us to model, and repeatedly debug, to ensure that it our mount fit into the hub of the turbine holding the fixed blade. After repeated changes, the printer finally produced three sets of fan blades of different shapes. The wind simulation equipment still must be used be to complete our testing. By adjusting the wind speed and measuring the recorded output power, it will eventually be converted into an experimental model: a certain shape of blade generates higher electrical power.

The purpose of our wind turbine blade design research is to find the most efficient blade shape for power production. Our plan was to first study the size and structure of existing blades, then use the AutoDesk Inventor 3D program to design a suitable blade profile. After 3D printing the desired blade profile it would be tested using the existing wind turbine simulation equipment in the lab. The Inventor software allowed us to model, and repeatedly debug, to ensure that it our mount fit into the hub of the turbine holding the fixed blade. After repeated changes, the printer finally produced three sets of fan blades of different shapes. The wind simulation equipment still must be used be to complete our testing. By adjusting the wind speed and measuring the recorded output power, it will eventually be converted into an experimental model: a certain shape of blade generates higher electrical power.

The purpose of our wind turbine blade design research is to find the most efficient blade shape for power production. Our plan was to first study the size and structure of existing blades, then use the AutoDesk Inventor 3D program to design a suitable blade profile. After 3D printing the desired blade profile it would be tested using the existing wind turbine simulation equipment in the lab. The Inventor software allowed us to model, and repeatedly debug, to ensure that it our mount fit into the hub of the turbine holding the fixed blade. After repeated changes, the printer finally produced three sets of fan blades of different shapes. The wind simulation equipment still must be used be to complete our testing. By adjusting the wind speed and measuring the recorded output power, it will eventually be converted into an experimental model: a certain shape of blade generates higher electrical power.

The purpose of our wind turbine blade design research is to find the most efficient blade shape for power production. Our plan was to first study the size and structure of existing blades, then use the AutoDesk Inventor 3D program to design a suitable blade profile. After 3D printing the desired blade profile it would be tested using the existing wind turbine simulation equipment in the lab. The Inventor software allowed us to model, and repeatedly debug, to ensure that it our mount fit into the hub of the turbine holding the fixed blade. After repeated changes, the printer finally produced three sets of fan blades of different shapes. The wind simulation equipment still must be used be to complete our testing. By adjusting the wind speed and measuring the recorded output power, it will eventually be converted into an experimental model: a certain shape of blade generates higher electrical power.

The purpose of our wind turbine blade design research is to find the most efficient blade shape for power production. Our plan was to first study the size and structure of existing blades, then use the AutoDesk Inventor 3D program to design a suitable blade profile. After 3D printing the desired blade profile it would be tested using the existing wind turbine simulation equipment in the lab. The Inventor software allowed us to model, and repeatedly debug, to ensure that it our mount fit into the hub of the turbine holding the fixed blade. After repeated changes, the printer finally produced three sets of fan blades of different shapes. The wind simulation equipment still must be used be to complete our testing. By adjusting the wind speed and measuring the recorded output power, it will eventually be converted into an experimental model: a certain shape of blade generates higher electrical power.

The purpose of our wind turbine blade design research is to find the most efficient blade shape for power production. Our plan was to first study the size and structure of existing blades, then use the AutoDesk Inventor 3D program to design a suitable blade profile. After 3D printing the desired blade profile it would be tested using the existing wind turbine simulation equipment in the lab. The Inventor software allowed us to model, and repeatedly debug, to ensure that it our mount fit into the hub of the turbine holding the fixed blade. After repeated changes, the printer finally produced three sets of fan blades of different shapes. The wind simulation equipment still must be used be to complete our testing. By adjusting the wind speed and measuring the recorded output power, it will eventually be converted into an experimental model: a certain shape of blade generates higher electrical power.

The purpose of our wind turbine blade design research is to find the most efficient blade shape for power production. Our plan was to first study the size and structure of existing blades, then use the AutoDesk Inventor 3D program to design a suitable blade profile. After 3D printing the desired blade profile it would be tested using the existing wind turbine simulation equipment in the lab. The Inventor software allowed us to model, and repeatedly debug, to ensure that it our mount fit into the hub of the turbine holding the fixed blade. After repeated changes, the printer finally produced three sets of fan blades of different shapes. The wind simulation equipment still must be used be to complete our testing. By adjusting the wind speed and measuring the recorded output power, it will eventually be converted into an experimental model: a certain shape of blade generates higher electrical power.

The purpose of our wind turbine blade design research is to find the most efficient blade shape for power production. Our plan was to first study the size and structure of existing blades, then use the AutoDesk Inventor 3D program to design a suitable blade profile. After 3D printing the desired blade profile it would be tested using the existing wind turbine simulation equipment in the lab. The Inventor software allowed us to model, and repeatedly debug, to ensure that it our mount fit into the hub of the turbine holding the fixed blade. After repeated changes, the printer finally produced three sets of fan blades of different shapes. The wind simulation equipment still must be used be to complete our testing. By adjusting the wind speed and measuring the recorded output power, it will eventually be converted into an experimental model: a certain shape of blade generates higher electrical power.

In today’s connected world, our lives depend heavily on information obtained from networks of sensor nodes and mobile devices. Billons of mobile devices are in communication over these networks at any given time. The trillion sensor vision calls for low-power, low-cost and small-sized wireless sensor nodes, posing ever-increasing constraints on the power consumption of wireless networks. Radio Frequency (RF) Microelectromechanical Systems (MEMS) offer one path towards nano-watt wireless communications.This dissertation presents the first demonstration of an all-mechanical wireless receiver that employs a micromechanical resonant switch (“resoswitch”) to consume zero quiescent power while listening and ~30nW while actively receiving. Here, high-Q mechanical resonance offers frequency selectivity, while mechanical impact switching provides amplification. The mechanical receiver successfully detects and demodulates (in an On-Off-Keying (OOK) fashion) Frequency-Shift-Keying (FSK)-modulated input signals down to -68dBm, a promising sensitivity for low-speed and low-power wireless applications. Because this receiver consumes no power while listening in standby, it obviates the sleep/wake cycles often used by low power sensor networks to save energy. It thus eliminates the need for continuously operating clocks that govern sleep/wake periods, thereby eliminating their power consumption.If on the other hand one prefers to use more conventional mote transceivers that consume tens of milli-watts when on, then the sleep/wake strategy is paramount to save energy, and the clock sets the power bottleneck. A commercially available real time clock (RTC) typically consumes 1µW of power, which is considerably more than the tens of nano-watts more applicable for giant sensor networks. Fortunately, even when not used as a wireless transceiver, the all-mechanical circuit herein provides a solution to the clock problem, as well.Specifically, the second part of this dissertation presents

In today’s connected world, our lives depend heavily on information obtained from networks of sensor nodes and mobile devices. Billons of mobile devices are in communication over these networks at any given time. The trillion sensor vision calls for low-power, low-cost and small-sized wireless sensor nodes, posing ever-increasing constraints on the power consumption of wireless networks. Radio Frequency (RF) Microelectromechanical Systems (MEMS) offer one path towards nano-watt wireless communications.This dissertation presents the first demonstration of an all-mechanical wireless receiver that employs a micromechanical resonant switch (“resoswitch”) to consume zero quiescent power while listening and ~30nW while actively receiving. Here, high-Q mechanical resonance offers frequency selectivity, while mechanical impact switching provides amplification. The mechanical receiver successfully detects and demodulates (in an On-Off-Keying (OOK) fashion) Frequency-Shift-Keying (FSK)-modulated input signals down to -68dBm, a promising sensitivity for low-speed and low-power wireless applications. Because this receiver consumes no power while listening in standby, it obviates the sleep/wake cycles often used by low power sensor networks to save energy. It thus eliminates the need for continuously operating clocks that govern sleep/wake periods, thereby eliminating their power consumption.If on the other hand one prefers to use more conventional mote transceivers that consume tens of milli-watts when on, then the sleep/wake strategy is paramount to save energy, and the clock sets the power bottleneck. A commercially available real time clock (RTC) typically consumes 1µW of power, which is considerably more than the tens of nano-watts more applicable for giant sensor networks. Fortunately, even when not used as a wireless transceiver, the all-mechanical circuit herein provides a solution to the clock problem, as well.Specifically, the second part of this dissertation presents

Extant research finds inconclusive evidence about the CEO horizon problem. One possibility is that compensation committees design CEO compensation in a way that discourages retiring CEOs from opportunistic earnings management and R&D reduction. However, compensation committees dominated by co-opted directors may not be as effective as those with fewer co-opted directors in mitigating the CEO horizon problem, because directors co-opted by the CEO tend to bias their decisions in favor of the CEO. I find that compensation committees dominated by co-opted directors are associated with higher CEO compensation packages. I document R&D reduction and accruals management in firms with retiring CEOs and compensation committees dominated by co-opted directors, and find that R&D reduction and income-increasing accruals are less discouraged by compensation committees dominated by co-opted directors when deciding CEO compensation. I also examine the effect of boards of directors and compensation committee characteristics on CEO compensation and on mitigating the CEO horizon problem. I find that CEO compensation positively associates with CEO power, director independence, and the percentage of busy directors, and negatively associates with board of directors and committee size and director ownership. Moreover, I find that retiring CEOs are more likely to reduce R&D expenditures when CEOs have more power, and director tenure is longer; retiring CEOs in firms with large boards of directors and compensation committees are less likely to manage accruals.

Extant research finds inconclusive evidence about the CEO horizon problem. One possibility is that compensation committees design CEO compensation in a way that discourages retiring CEOs from opportunistic earnings management and R&D reduction. However, compensation committees dominated by co-opted directors may not be as effective as those with fewer co-opted directors in mitigating the CEO horizon problem, because directors co-opted by the CEO tend to bias their decisions in favor of the CEO. I find that compensation committees dominated by co-opted directors are associated with higher CEO compensation packages. I document R&D reduction and accruals management in firms with retiring CEOs and compensation committees dominated by co-opted directors, and find that R&D reduction and income-increasing accruals are less discouraged by compensation committees dominated by co-opted directors when deciding CEO compensation. I also examine the effect of boards of directors and compensation committee characteristics on CEO compensation and on mitigating the CEO horizon problem. I find that CEO compensation positively associates with CEO power, director independence, and the percentage of busy directors, and negatively associates with board of directors and committee size and director ownership. Moreover, I find that retiring CEOs are more likely to reduce R&D expenditures when CEOs have more power, and director tenure is longer; retiring CEOs in firms with large boards of directors and compensation committees are less likely to manage accruals.

Extant research finds inconclusive evidence about the CEO horizon problem. One possibility is that compensation committees design CEO compensation in a way that discourages retiring CEOs from opportunistic earnings management and R&D reduction. However, compensation committees dominated by co-opted directors may not be as effective as those with fewer co-opted directors in mitigating the CEO horizon problem, because directors co-opted by the CEO tend to bias their decisions in favor of the CEO. I find that compensation committees dominated by co-opted directors are associated with higher CEO compensation packages. I document R&D reduction and accruals management in firms with retiring CEOs and compensation committees dominated by co-opted directors, and find that R&D reduction and income-increasing accruals are less discouraged by compensation committees dominated by co-opted directors when deciding CEO compensation. I also examine the effect of boards of directors and compensation committee characteristics on CEO compensation and on mitigating the CEO horizon problem. I find that CEO compensation positively associates with CEO power, director independence, and the percentage of busy directors, and negatively associates with board of directors and committee size and director ownership. Moreover, I find that retiring CEOs are more likely to reduce R&D expenditures when CEOs have more power, and director tenure is longer; retiring CEOs in firms with large boards of directors and compensation committees are less likely to manage accruals.

For questions contact ScholarsRepository@fhsu.edu, The purpose of our wind turbine blade design research is to find the most efficient blade shape for power production. Our plan was to first study the size and structure of existing blades, then use the AutoDesk Inventor 3D program to design a suitable blade profile. After 3D printing the desired blade profile it would be tested using the existing wind turbine simulation equipment in the lab. The Inventor software allowed us to model, and repeatedly debug, to ensure that it our mount fit into the hub of the turbine holding the fixed blade. After repeated changes, the printer finally produced three sets of fan blades of different shapes. The wind simulation equipment still must be used be to complete our testing. By adjusting the wind speed and measuring the recorded output power, it will eventually be converted into an experimental model: a certain shape of blade generates higher electrical power.