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View article: Cosmic Evolution Optimization: A Novel Metaheuristic Algorithm for Numerical Optimization and Engineering Design
Cosmic Evolution Optimization: A Novel Metaheuristic Algorithm for Numerical Optimization and Engineering Design Open
This study proposes a novel metaheuristic algorithm, Cosmic Evolution Optimization (CEO), for numerical optimization and engineering design. Inspired by the cosmic evolution process, CEO simulates physical phenomena including cosmic expans…
View article: Transformer Network-Based Probabilistic Distribution Prediction for Electricity Load
Transformer Network-Based Probabilistic Distribution Prediction for Electricity Load Open
Traditional electricity load forecasting methods struggle to address renewable energy fluctuations and long-term dependencies. This paper proposes a Transformer-quantile regression hybrid model to improve prediction accuracy and confidence…
View article: Polarization‐Reconfigurable Multi‐Antenna for High Mutual Coupling Reduction Using Backload Parasitic Structure
Polarization‐Reconfigurable Multi‐Antenna for High Mutual Coupling Reduction Using Backload Parasitic Structure Open
This paper introduces a polarization‐reconfigurable antenna array with reduced mutual coupling achieved by incorporating a backloaded parasitic structure, which is an easily loaded design. The proposed antenna array achieves high isolation…
View article: Wide null steering of realistic antenna array
Wide null steering of realistic antenna array Open
In this paper, a wide-null pattern synthesizing and steering technique for realistic antenna array is proposed by minimizing the power radiation in the nulling space. The optimal excitation distribution (OED) to form an array pattern with …
View article: Causal-Aware Multimodal Transformer for Supply Chain Demand Forecasting: Integrating Text, Time Series, and Satellite Imagery
Causal-Aware Multimodal Transformer for Supply Chain Demand Forecasting: Integrating Text, Time Series, and Satellite Imagery Open
Supply chain demand forecasting faces unprecedented challenges due to the complex interplay of multiple information sources, including market dynamics reflected in textual data, historical consumption patterns, and macroeconomic indicators…
View article: Photoreconfigurable Metasurface for Independent Full-Space Control of Terahertz Waves
Photoreconfigurable Metasurface for Independent Full-Space Control of Terahertz Waves Open
We present a novel photoreconfigurable metasurface designed for independent and efficient control of electromagnetic waves with identical incident polarization and frequency across the entire spatial domain. The proposed metasurface featur…
View article: Neural-network enhanced adaptive design for ultrathin single-substrate transmissive wide-band optimized polarization converters
Neural-network enhanced adaptive design for ultrathin single-substrate transmissive wide-band optimized polarization converters Open
A neural-network enhanced adaptive design for ultrathin, single-substrate polarization converters optimized for wideband transmission is proposed. This research utilizes machine learning to tackle the inverse design challenge, aiming for c…
View article: An Electrically Small Patch Antenna Sensor for Salt Concentration Measurement of NaCl Solution
An Electrically Small Patch Antenna Sensor for Salt Concentration Measurement of NaCl Solution Open
In this paper, a complementary split-ring resonator (CSRR)-based patch antenna is proposed as a microwave sensor to measure the salt concentration of NaCl solution. The microwave sensor consists of an RF-4 substrate, where a small copper d…
View article: Design of a transmissive dual-frequency polarization rotator for linearly polarized electromagnetic wave
Design of a transmissive dual-frequency polarization rotator for linearly polarized electromagnetic wave Open
This paper presents the design of a transmission-type dual-frequency polarization rotator for linearly polarized electromagnetic wave. The rotator facilitates polarization conversion for incident waves at any azimuth angle ϕ at two specifi…
View article: Circular Antenna Array with Beam Direction and Polarization Control
Circular Antenna Array with Beam Direction and Polarization Control Open
In this paper, a circular antenna array is presented for indoor communication. The antenna array consists of 8 dual-polarization antenna elements. At first, the circular antenna array is fed identically, an azimuthal omnidirectional patter…
View article: Flexible rotation of linear polarization conversion with a frequency selective surface
Flexible rotation of linear polarization conversion with a frequency selective surface Open
A high-efficiency transmitted polarization converter based on a frequency selective surface (FSS) is proposed in this paper. The FSS-based polarization converter (FSS-PC) is designed based on receiving-via-transmitting (RVT) structure. The…
View article: Design of a Reconfigurable Ultra-Wideband Terahertz Polarization Rotator Based on Graphene Metamaterial
Design of a Reconfigurable Ultra-Wideband Terahertz Polarization Rotator Based on Graphene Metamaterial Open
In this work, a reconfigurable ultra-wideband transmissive terahertz polarization rotator based on graphene metamaterial is proposed that can switch between two states of polarization rotation within a broad terahertz band by changing the …
View article: Beam Shaping of Base Station Antenna Array by Using MMPTE
Beam Shaping of Base Station Antenna Array by Using MMPTE Open
In this paper, a beam shaping scheme is presented for the optimal design of base station antenna array. The antenna array consists of four linearly arranged dual-band dual-polarized antenna elements, and it is designed to cover the LTE fre…
View article: Polarization-Reconfigurable Antenna Using Combination of Circular Polarized Modes
Polarization-Reconfigurable Antenna Using Combination of Circular Polarized Modes Open
This paper presents a novel polarization-reconfigurable antenna based on the combination of circularly polarized (CP) modes, which is capable of changing its polarization states among arbitrary linear polarizations (LPs), left-handed circu…
View article: Direct routing of intensity-editable multi-beams by dual geometric phase interference in metasurface
Direct routing of intensity-editable multi-beams by dual geometric phase interference in metasurface Open
Controlling spin electromagnetic waves by ultra-thin Pancharatnam-Berry (PB) metasurfaces show promising prospects in the optical and wireless communications. One of the major challenge is to precisely control over the complex wavefronts a…
View article: Binary geometric phase metasurface for ultra-wideband microwave diffuse scatterings with optical transparency
Binary geometric phase metasurface for ultra-wideband microwave diffuse scatterings with optical transparency Open
Diffuse scatterings of electromagnetic (EM) waves by thin-thickness metasurfaces have promising prospects in many fields due to their abilities of significantly reducing the backward scatterings of targets. One of the major challenges is t…
View article: Tannin-based biosorbent encapsulated into calcium alginate beads for Cr(VI) removal
Tannin-based biosorbent encapsulated into calcium alginate beads for Cr(VI) removal Open
A composite biosorbent (AC-TFR) prepared by encapsulating tannin-formaldehyde resin (TFR) into calcium alginate (AC) beads was used to remove Cr(VI) from an aqueous solution. Various influencing factors, such as TFR dosage, pH, initial Cr(…
View article: Independent wavefront tailoring in full polarization channels by helicity-decoupled metasurface
Independent wavefront tailoring in full polarization channels by helicity-decoupled metasurface Open
Controlling the polarization and wavefront of light is essential for compact photonic systems in modern science and technology. This may be achieved by metasurfaces, a new platform that has radically changed the way people engineer wave-ma…
View article: Achieving Directive Radiation and Broadband Microwave Absorption by an Anisotropic Metasurface
Achieving Directive Radiation and Broadband Microwave Absorption by an Anisotropic Metasurface Open
Simultaneously integrating electromagnetic absorption and wavefront-shaping into a single metasurface with flat and low profile is crucial for many practical applications both in science and engineering community. Here, by introducing loss…
View article: Broadband microwave metamaterial absorber with lumped resistor loading
Broadband microwave metamaterial absorber with lumped resistor loading Open
Narrow absorption bandwidth has been a fundamental drawback hindering many metamaterial absorbers for practical applications. In this paper, by loading lumped resistors, we have successfully designed a microwave metamaterial absorber with …
View article: Optically transparent metasurface Salisbury screen with wideband microwave absorption
Optically transparent metasurface Salisbury screen with wideband microwave absorption Open
We present an optically transparent broadband microwave absorber based on the concept of metasurface Salisbury screen (MSS). The metasurface with optimized reflection phase profiles is used as the ground plane to excite multi-MSS resonance…
View article: Full control of conical beam carrying orbital angular momentum by reflective metasurface
Full control of conical beam carrying orbital angular momentum by reflective metasurface Open
Conical beams have recently attracted much attention due to their excellent performances and potential applications in wireless and satellite-based communication technology. Here, reflective metasurfaces composed of Pancharatnam-Berry (PB)…
View article: Polarization-dependent bi-functional metasurface for directive radiation and diffusion-like scattering
Polarization-dependent bi-functional metasurface for directive radiation and diffusion-like scattering Open
In this paper, we design a bi-functional metasurface with different spatial distribution of reflection phase responses depending on the incident polarization. The metasurface with a thickness of only 0.067 λ0 (λ0 is the working wavelength)…
View article: ASSOCIATION BETWEEN HEALTH STATUS AND LONG-TERM CARE NEEDS: A COHORT STUDY OF JAPANESE ELDERLY
ASSOCIATION BETWEEN HEALTH STATUS AND LONG-TERM CARE NEEDS: A COHORT STUDY OF JAPANESE ELDERLY Open
\nIntroduction: WHO defines health as a complete state of mental, physical and social wellbeing. However, there have been limited detailed evidences that objectively and systematically assessed the chronological relationships between these…
View article: Silver-Based Low-Emissivity Coating Technology for Energy- Saving Window Applications
Silver-Based Low-Emissivity Coating Technology for Energy- Saving Window Applications Open
Low-emissivity (low-E) technology is a unique and cost-effective solution to save energy in buildings for different climates. Its development combines advances in materials science, vacuum deposition, and optical design. In this chapter, w…
View article: Comment on “Size-efficient metamaterial absorber at low frequencies: Design, fabrication, and characterization” [J. Appl. Phys. <b>117</b>, 243105 (2015)]
Comment on “Size-efficient metamaterial absorber at low frequencies: Design, fabrication, and characterization” [J. Appl. Phys. <b>117</b>, 243105 (2015)] Open
In a recent article, Khuyen et al. [J. Appl. Phys. 117, 243105 (2015)] proposed a metamaterial perfect absorber (MPA) with a self-asymmetric structure and claimed that it could produce dual-band “perfect absorption.” In this report, we dem…
View article: Thickness and microstructure effects in the optical and electrical properties of silver thin films
Thickness and microstructure effects in the optical and electrical properties of silver thin films Open
The optical and electrical response of metal thin films approaching thicknesses in the range of the electron mean free path is highly affected by electronic scattering with the interfaces and defects. Here, we present a theoretical and exp…