To investigate the light and temperature environmental parameters of photovoltaic greenhouses in tropical areas, this study adopted experimental measurement simulation methods to test simulate photosynthetically active radiation (PAR), relative humidity, other inside outside two types serrated Langheng Village, Yangpu, Hainan. The aimed explore distribution laws PAR, transmission rates, humidity double-slope single-slope greenhouses. ridges both run east west, with panels arranged on...

Studies of catalytic CO2 absorption and desorption were completed in two well-performed tertiary amines: diethylmonoethanolamine (DEEA) 1-dimethylamino-2-propanol (1DMA-2P), with the aid CaCO3 MgCO3 process, γ-Al2O3 H-ZSM-5 process. The batch process was used for solid alkalis, recirculation acid catalysts. equilibrium solubility pKa also measured at 293 K results comparable to literature. tests discovered that heterogeneous catalysis amines on both sides quite different from...

Narrowband Internet of Things (NB-IoT) is a powerful technology for massive machine-type communications, which imperative in the forthcoming 5G wireless communications. Unlike long-time evolution (LTE) protocol, NB-IoT protocol specified by third generation partnership project (3GPP), narrowband physical random access channel (NPRACH) newly introduced and its receiver performance critical to success an system. In this article, optimal activity detection scheme first designed using...

Abstract In order to solve the problems of low transmission rate and large device size electro-optical modulator, an electro-optic half subtractor based on silicon-based hybrid surface plasmon polariton waveguide is proposed in this study. The utilizes three units metal-oxide-semiconductor capacitor structure achieve logic function control, improving while also reducing using technology, with a only 32 μm × 4.3 μm. At same time, use silicon waveguides reduces sharp Ohmic attenuation caused...

Although precast concrete structures have been widely used in building engineering, their application moderate- and high-seismic zones is restricted because of poor lateral performance. This study proposed a fully assembled frame with buckling-restrained braces (PCF-BRB) to simplify construction enhance seismic A nonlinear finite element model the PCF-BRB was established using ETABS investigate feasibility its use regions. The accuracy rationality analysis were verified by existing...

Hangers in through-arch bridges are important components since they suspend the entire bridge deck from arch ribs. Local damage at a hanger may lead to subsequent of various vicinity or even progressive collapse bridge. After reviewing conventional design double-hangers bridges, this paper puts forward new approach. The suitability and robustness approach then verified by numerical simulation real impact effects induced local fracture on other structural members simulated dynamic...

In an optical network-on-chip, waveguides play a crucial role in transmitting signals. Therefore, it is essential for to have compact size and low insertion loss. This paper proposes new type of waveguide with vacuum gap based on surface plasmon polaritons. By utilizing polariton technology, the proposed reduces scattering attenuation caused by hybrid polaritons, saves space enables integration more devices chip while maintaining ultracompact requirement. Finite-Difference Time-Domain (FDTD)...

The Korteweg-de Vries (KdV) equation is a fundamental partial differential that models wave propagation in shallow water and other dispersive media. Accurately solving the KdV essential for understanding dynamics physics engineering applications. This project focuses on implementing Crank-Nicolson scheme, finite difference method known its stability accuracy, to solve equation. scheme's implicit nature allows more stable numerical solution, especially handling nonlinear terms of We...

With the rapid development of society, new generation high-power LED light source has many advantages, such as low energy consumption, fast response, vibration resistance, high efficiency and long service life. However, problem heat dissipation also makes people rack their brains. How to efficient is key improve output power extend working In this paper, fluid transfer simulation analysis was carried out by floEFD embedded in UG environment, PCB related materials headlights influence fin...

Abstract This article proposes an on-chip optical temperature sensor based on a cascaded microring resonator, which is composed of reference ring and sensing with different sensitivities free spectral ranges. By changing the window environment, thermal effect waveguide causes change in refractive index waveguide, affects sensitivity spectrum changes sensor. The output response shifts, achieving detection. experimental results show that this 303.6 pm/°C, 3.65 times limit single 83 pm/°C....

External insulation is severely influenced by atmospheric environment, such as temperature, humidity and density of air. Based on a large amount discharge voltages monitored outdoor auto device tested in artificial climate chamber, the effects temperature voltage air gap are studied respectively jointly this thesis. It shown that decrease with increase temperature. taken positive correlation between when relative less than 80%; while it negative above 80%. The tests show some significantly...

Graphene-based hybrid photo detectors are promising for weak-light detection with high gain. In this paper, we focused on the details of scaling effect grapheme-based detectors. By designing a series devices different sizes from 10*10μm2 to 100*100μm2, found that photocurrent generally decreases increased channel length but decreased width. Our study would be useful clarifying real potential gating in image applications.