In this paper, we propose and demonstrate a broadband microwave absorber based on magnetic metamaterial structure elements. We deploy FeCo soft composite with droplet shape as the primary resonant element. By investigating modes coupling between periodic unit-cells incident microwave, it is found intrinsic susceptibility of elements could make field confined in element, thus results absorption. Our work provides new approach to realize absorbers hybrid absorption mechanisms, including...

The merging of traditional microwave absorbing materials with metamaterials holds significant potential for enhancing absorber performance. To unlock this potential, a unified paradigm is urgently required. We have successfully established such paradigm, focusing on regulating effective electromagnetic parameters and interfacial forms across microscopic, mesoscopic, macroscopic scales. Building upon foundation, we introduce an active co-design methodology jointly optimizing full-scale...

This paper proposes a genetic algorithm (GA)-enabled co-design method for the development of metamaterials with on-demand microwave reflectivity and infrared (IR) emissivity. First, we proposed multilayered metamaterial based on metasurface hexagonal patch ring patterns. An equivalent circuit model (ECM) was then established to metamaterial. To achieve broadband low reflectivity, GA this ECM adopted optimize structural parameters A task accomplished by setting judgment condition in IR With...

High-contrast gratings (HCGs) based spoof surface plasmon polaritons (SSPPs), as a new kind of SSPPs, have been proposed recently. Here, we study their particular mechanism and characteristics by comparing them with traditional metal-type SSPPs. The different fundamental dielectric resonator modes decided the height–length ratio R element are found to be key factor mechanism, leading providing more working modes. In low mode, HCG-based SSPPs can work under deep-subwavelength thickness easily...

Abstract Surface lattice resonances (SLRs) have been widely studied in optical field recent years but none microwave field. Meanwhile, some multi-band low-permittivity all-dielectric metamaterial absorbers (ADMMAs) fabricated by machining reported recently band and exhibited similar characteristics with SLRs. Considering this, SLRs are investigated here a dual-band ADMMA period of 20 mm is designed accordingly 3D printing. The simulation result shows an anomaly at 15 GHz two absorption peaks...

Zijincheng, also known as the Forbidden City, is largest and best-preserved ancient palace-type wooden building in China, built without using a single nail. Since it was 1420, has served palace where emperor lives works. Almost 600 years old, gone through two dynasties (i.e., Ming Qing (AD 1368–AD 1912)) 24 emperors. It survived more than 200 devastating earthquakes throughout its history, still standing strong. In this paper, authors introduce construction technology of Chinese structure...

Surface water dynamics are sensitive to climate change and anthropogenic activity, they exert important feedback the above two processes. However, it is unclear how human activity affect surface variation, especially in semi-arid regions, such as Horqin Sandy Land (HQSL), a typical part of fragile region for intensive interaction land use northern China. We investigated changes spatiotemporal distribution influence climatic factors on Water Area (SWA) HQSL. There 5933 Landsat images used...

To improve the seismic capacity of prestressed concrete (PC) continuous girder bridges with corrugated steel webs (CSWs), suitable damping control measures can be used to effectively reduce response bridge. Based on semi-active theory, system a three-span PC bridge CSWs is designed, and program compiled by MATLAB. The time–history curves damper energy consumption active optimal algorithm three different algorithms are compared analyzed, as main displacement, acceleration, pier internal force...

Abstract In this paper, high-contrast gratings based spoof surface plasmon polaritons (HCG-based SSPPs), as a new mechanism of all-dielectric metamaterial absorbers (ADMMAs), are used to enhance their bandwidth. Accordingly, broadband ADMMA is designed with carbon black composite. It consists cylinder array structure which made The simulation results show that absorption realized from 6.1 GHz 18 three peaks under total thickness 3.9 mm. first peak attributed HCG-based SSPPs, while the other...

Xiong’an railway station near Beijing in China is the largest Asia. It was opened December 2020 and took just 2 years to build. Novel features include extensive use of fair-faced concrete, self-sufficiency lighting energy, sound-absorbing platform walls artificial intelligence for real-time building management. The construction team focused on quality management control throughout delivery, with smart techniques. These included cloud computing, internet things, big data, intelligence, mobile...

As one of the world's longest spanning wooden arch bridge with glued laminated timber, Xuhong Bridge, is located in Suzhou, China. The innovation this lies its use high-hardness wood and skillful combination a new truss structural system that utilizes timber technology modern joint construction. This has achieved beautiful configuration efficient performance, allowing span Bridge to reach 90 m. design using these technologies broken through traditional concepts technical challenges observed...

Beijing Daxing International, which officially opened in September 2019 after 5 years of construction, is the largest airport China and has world’s biggest terminal. It also first to feature double-deck arrival departure lounges an underground high-speed rail service. Engineering highlights include a world-class seismic base isolation system, long-span irregular curved node truss structure, glazed roof with 12 800 panes, eight hyperboloid C-shaped columns as main load-bearing elements...

Abstract To meet the demanding requirements of practical microwave absorbers, such as broadband absorption, considerations must encompass thickness, flexibility, surface density, and manufacturing feasibility. However, absorbers that effectively address all these aspects are currently scarce. This study introduces a novel graphene-based all-dielectric metamaterial absorber (ADMMA) featuring trap-like structure, inspired by impedance alternation strategy. Leveraging dielectric dispersion...

The new 277 km Fuzhou–Xiamen high-speed railway in China is the country’s first cross-sea designed for operational speeds of 350 km/h. Completed 2023, it involved various advanced construction technologies, including world’s 1000 t bridge-building machine to be used offshore, corrosion-resistant steel, pioneering rotation a main bridge pylon, and aerodynamic steel–concrete composite decks with ballastless tracks. innovative project represents milestone China’s railway, heralding era transportation.

Inspired by the fields of composites and soft robotics, this paper designs a textile-based structure which could realize variable stiffness configurations, they thus make it present high adaptability as flexible furniture structure. The mechanisms properties realized braiding jamming, together with fabrication considerations analytical methods are introduced in detail. Down-scale beam elements different profiles were physically numerically established, based on distinct foldability,...

In this paper, the impact of coupling between unit cells on performance linear-to-circular polarization conversion metamaterial with half transmission and reflection is analyzed by changing distance cells. An equivalent electrical circuit model then built to explain it based analysis. The simulated results show that, when 23 mm, converts incident linearly-polarized wave into reflected left-hand circularly-polarized other transmitted at 4.4 GHz; 28 reflects all 32 right-hand GHz. tunability...

In magnetic random access memory (MRAM), free layers are used to store data bits as “0” or “1” in binary system. The main bottleneck limiting the practical applications of current MRAM technology is its storage states’ transition probability. Although several generations have been reported, problem still puzzles us. Here, we utilize an external field switch Co slotted nanoring, which convenient reveal key factor control moments’ flip. Based on such analysis, present a robust write operation...