Since optical links are easily blocked by obstacles in the environment, they have been considered difficult to directly perform wireless communications. However, reconfigurable intelligent surfaces (RISs), as a new type of digital coding meta-materials, can significantly improve coverage communication establishing links. We propose controllable multi-branch system based on RISs. By setting up multiple RISs artificial channels built performance and reduce outage probability. In this paper, we...

It is difficult for free space optical communication to be applied in mobile due the obstruction of obstacles environment, which expected solved by reconfigurable intelligent surface technology. The a new type digital coding meta-materials, can reflect, compute and program electromagnetic waves real time. We purpose controllable multi-branch wireless system based on By setting up multiple artificial channels are built improve performance reduce outage probability. Three factors affecting...

Traditional visible light positioning (VLP) systems estimate receivers' coordinates based on the assumption that light-emitting diode (LED) are known accurately, which is not always practical. Even with accurate laser range finders, structural changes of buildings due to temperature, humidity, and material aging might affect LED unpredictably. Besides, when number LEDs increases, it time-consuming build a database coordinates. In this paper, we propose novel system exploiting two optical...

Unmanned aerial vehicles (UAVs) have been widely applied for their high mobility and low cost, the visible light communication (VLC) aided UAV can combine flexibility of transmission rate VLC. However, VLC links a are inevitably affected by jittering effects, which were rarely characterized. In this letter, channel between emitting diode (LED) hovering is modeled considering random orientation error UAV. Closed-form expressions derived probability density function (PDF) cumulative...

The coordinates of beacon light-emitting diodes (LEDs) are assumed as known prior information in most visible light positioning (VLP) systems. However, such an assumption may be unpractical because the structures buildings change unpredictably due to material aging or changes temperature and humidity. Therefore, a periodical update LEDs' is necessary for accurate VLP. When number LEDs increases, manual measurement becomes too time-consuming laborious. In this paper, we propose novel LED...

Abstract Accumulating evidence has suggested a strong correlation between age‐related bone diseases and abnormal metabolism of microenvironment‐related cells, including mesenchymal stem cells (MSCs), osteoblasts, osteoclasts, osteocytes, chondrocytes. Mitochondrial dysfunction significantly impacts cell initiates the development progress numerous diseases. autophagy or mitophagy, process that selectively removes damaged dysfunctional mitochondria, is closely associated with maintaining...

Free space optical communication has been applied in many scenarios because of its security, low cost and high rates. In such scenarios, a tracking system is necessary to ensure an acceptable signal power. links were considered unable support fast moving nodes, as unmanned aerial vehicles, cars or pedestrians, mobile existing schemes fail track the nodes accurately rapidly. this paper, we propose novel exploiting multiple beacon lasers. Each laser's power measured estimate orientation...

Light-emitting diodes (LEDs) are widely used in visible light communication (VLC) systems, but their bandwidth is generally incomparable to the laser (LDs). Though LDs exploited free space optical systems provide high data rate, such fail for mobile users due challenges acquisition, tracking and pointing. Recently, various centimeter-level positioning (VLP) have been realized, making it possible realize VLP-assisted systems. In this work, we design a novel indoor system, where an LED...

Light-emitting diodes (LEDs) are widely used in visible light communication (VLC) systems, but their bandwidth is generally incomparable to the laser (LDs). Though LDs exploited free space optical systems provide high data rate, such fail for mobile users due challenges acquisition, tracking and pointing. Recently, various centimeter-level positioning (VLP) have been realized, making it possible realize VLP-assisted systems. In this work, we design a novel indoor system, where an LED...

With the development of VR technology, especially emergence metaverse concept, integration visual and tactile perception has become an expected experience in human-machine interaction. Therefore, achieving spatial-temporal consistency information applications a necessary factor for realizing this experience. The state-of-the-art vibrotactile datasets generally contain temporal-level collected by randomly sliding on surface object, along with corresponding image material/texture. However,...

Multipath causes interferences to the optical receivers, and reduces accuracy of visible light positioning (VLP). The existing works mainly focused on simulation analysis signal responses incurred by scattering indoor surfaces, or error caused multipath in VLP systems. However, such can only provide insights for how propagation affects systems, but cannot separate exploit components. In this paper, we design a mode-mixed photodiode (PD) array receive overlapping signals two sources. sources...

Previous studies have shown that some inflammatory cytokines are associated with dentofacial anomalies (DA), but the causal relationship is unclear. Therefore, present study aimed to elucidate between circulating cytokines, and DA risk by Mendelian randomization analysis.

Massive multiple input output (MIMO) antennas can generate narrow and high-gain beams to overcome the severe propagation loss accurately locate users. However, even with MIMO, space resources provided by basestations (BSs) are still limited. This motivates study of collaboration BSs massive MIMO antennas, which has potential efficiently exploit reduce inter-user interference. In this paper, we joint beam allocation based on positioning information. We assume that several users randomly...

With the development of VR technology, especially emergence metaverse concept, integration visual and tactile perception has become an expected experience in human-machine interaction. Therefore, achieving spatial-temporal consistency information applications a necessary factor for realizing this experience. The state-of-the-art vibrotactile datasets generally contain temporal-level collected by randomly sliding on surface object, along with corresponding image material/texture. However,...

Free space optical communication has been applied in many scenarios because of its security, low cost and high rates. In such scenarios, a tracking system is necessary to ensure an acceptable signal power. links were considered unable support mobile when nodes are randomly moving at speed existing schemes fail track the accurately rapidly. this paper, we propose novel exploiting multiple beacon laser sources. At receiver, each laser's power measured estimate orientation target. Unlike which...

Laser communication links can provide large capacity and thus have potential in mobile communications, namely optical communications (OMC). In order to communicate with fast moving nodes, tracking system is developed realize stable laser links. However, traditional Gaussian beam model not be directly applied the target due irregular shape of spot. this paper, we derive received power an OMC oblique An approximate closed-form expression derived simplify calculation receiving gathered a...

Visible light communication and positioning (VLCP) systems have been rarely researched to sense model the obstacles. However, accumulating database containing signal amplitudes receiver positions can be exploited detect reconstruct shapes of In this work, we propose an algorithm obstacles in a VLCP system, where several light-emitting diodes (LEDs) are set at known positions, users equipped with photodiodes (PDs) randomly move receive LEDs' signals different positions. Based on received...

Optical wireless communication (OWC) has the potential to be applied in indoor, outdoor, and vehicle-to-vehicle communications for its lager bandwidth, high data rate security. devices usually need link align-ment OWC system, which can realized with universal joints fast steering mirrors avoid alignment error caused by atmospheric turbulence bad weather. However, optical such as have disadvantages of inflexible incompact structure because large size, is unsuitable small systems. To overcome...