Metal–organic frameworks (MOFs) as thin films have gained considerable attention in recent years because of their potential applications different fields. However, preparation integrated photonic MOF still remains a major challenge. This study reports an approach for the fabrication NH2-MIL-88B with general application to other based on simple spin-coating technique. A systematic effect suspension concentration, rotation speed, and cycles thickness optical quality coated is presented....

Flexible metal–organic framework-based, one-dimensional photonic crystals, which can selectively respond to various vapors due the “breathing effect”, were fabricated.

Since 2019, research into MXene derivatives has seen a dramatic rise; further progress requires rational design for specific functionality. Herein, through molecular by selecting suitable functional groups in the coating, we have implemented dual N doping of derivatives, nitrogen‐doped TiO 2 @nitrogen‐doped carbon nanosheets (N‐TiO @NC), to strike balance between active anatase at low temperatures, and activation high temperatures. The NH 3 reduction environment generated 400 °C as evidenced...

This article proposes an improved algorithm for the parameter identification of permanent magnet synchronous motors (PMSMs). An enhanced raccoon optimization (EROA) was formed by combining (ROA) with adaptive exploration radius, raccoon-washing-food-inspired, and escaping-predator strategies. First, using some functions in IEEE CEC2015, EROA solution has a large improvement convergence speed accuracy compared other algorithms. Second, is more stable under same conditions, as demonstrated...

In this paper, a stochastic techno-economic optimization framework is proposed for three different hybrid energy systems that encompass photovoltaic (PV), wind turbine (WT), and hydrokinetic (HKT) sources, battery storage, combined heat power generation, thermal storage (Case I: PV–BA–CHP–TES, Case II: WT–BA–CHP–TES, III: HKT–BA–CHP–TES), with the inclusion of electric using 2m + 1 point estimate method (2m PEM) utilizing real data obtained from city Espoo, Finland. The objective function...

A new graphene-based electrochemical biosensor was constructed and applied for the simple, rapid highly selective determination of glucose. The modified glassy carbon electrode (GCE) prepared using dopamine (DA) as a reducing agent graphene oxide (GO) capping to stabilize coat resulting reduced (RGO) surface it can polymerize form polydopamine (PDA). PDA-RGO composites were dropped onto surface, glucose oxidase (GOx) immobilized on by Michael addition. Finally, Pt nanoparticles (PtNPs)...

Chemically functionalized graphene (CFG) is proposed as a novel nanoscale optical heater by uniformly dispersing it in poly(dimethylsiloxane) (PDMS) matrix. And subsequently, simple, fast, and localized heating method on microfluidic chips demonstrated. CFG prepared through simultaneous modification reduction of oxide with dodecylamine solvothermal route. It well dispersed PDMS suspension to form uniform CFG/PDMS composite due the presence long‐dodecyl chain. The obtained composites are...

Chaos optical time-domain reflectometry (chaos OTDR) has an advantage of high spatial resolution without tradeoff measure distance by utilizing correlation detection based on broadband chaotic laser. However, achieving a usually requires wideband photodetector and high-speed data acquisition card. In this letter, we propose significant-bit method to improve the chaos OTDR instead increasing hardware bandwidth. method, reference echo signals are quantized with multi-bit analog-to-digital...

A visual pallet recognition system based on the accurate color segmentation is proposed. The basic idea to get feature samples from images in working environment before autonomous mobile forklift works. Then algorithms of morphological filtering, Sobel edge detection and Hough tranform are used forking side. At last, according two corners side, midpoint coordinates part direction side calculated, which pose provided for engagement. Experimental results show that recogition has good real-time...

Within the range of pressure from 9 to 28 MPa, mass flux 600 1500 kg/m2s, heat at inside wall 200 kW/m2, and temperature up 650 °C, experiments were conducted research forced convection transfer water in an inclined upward tube with inclination angle 20 deg inner diameter 26 mm. According experimental data, effects on analyzed detail. In subcritical region, it was found that characteristics are not uniform along circumference tube. Temperature top is always higher than bottom, which can be...

The lightweight design of the electric vehicle motor brought about more serious vibration and noise problem motor. An accurate modal calculation was basis for study characteristics finite element method used to perform simulation PMSM. Through reasonable simplification equivalence stator model, first 7 orders natural frequencies corresponding modes under free state were calculated. After that, accuracy model verified by hammering experiment prototype. Furthermore, above results will provide...

Nanoscale lanthanide-containing metal-organic frameworks (MOFs) have more and interest due to their great properties potential applications, but how construct them easily is still challenging. Here, we present a facile rapid synthesis of Eu(III)-containing MOF (denoted as NMOF) under ultrasonic irradiation. The effect the ratio addition order metal ions linkers on morphology size MOFs was investigated. It found that both can affect 1.4-benzenedicarboxylic acid(H2BDC) -based MOFs, they show...

Due to the problems of easy overshoot, poor robustness and difficult parameter tuning in SVM-DTC speed control system PMSM, super-twisting sliding mode active disturbance rejection (STSM-ADRC) controller is proposed. Firstly, order reduce adjustable parameters ADRC, a second-order linear tracking differentiator designed. Then, algorithm proposed replace nonlinear state error feedback (NLSEF) ADRC further its improve robustness, whilst stability verified. The simulation results verify...

Chitooligosaccharides (COS), a high-value chitosan derivative, have many applications in food, pharmaceuticals, cosmetics and agriculture owing to their unique biological activities. Chitosanase, which catalyzes the hydrolysis of chitosan, can cleave β-1,4 linkages produce COS. In this study, chitosanase-producing Bacillus paramycoides BP-N07 was isolated from marine mud samples. The chitosanase enzyme (BpCSN) activity 2648.66 ± 20.45 U/mL at 52 h able effectively degrade chitosan. molecular...

Abstract The coal quality characteristics of urban sludge were analyzed, and three types coal-sludge-coupled power generation technologies introduced, including direct mixing, flue gas drying steam indirect coupling generation. Three in coal-fired plant blending process, after directly by indirectly steam. control values ratio moisture content are it is considered that the should be controlled within 5%. at 30-40% 10%. influence on operation unit analyzed. boiler stable, fly ash slag has...

<title>Abstract</title> This article proposed an improved algorithm for the parameter identification of permanent magnet synchronous motors (PMSMs).An enhanced raccoon optimization (EROA) was formed by combining (ROA) with adaptive exploration radius strategy, raccoon-washing-food-inspired and escaping-predator strategy.First, using some functions in IEEE CEC2015, EROA solution has a large improvement convergence speed accuracy compared other algorithms.Second, is more stable under same...

A nonlinear and complicated phenomenon of the relationship between urban electricity needs temperature influences operation planning power systems. Ensuring effectiveness reliability supply requires precise prediction in various consumption scenarios. In this study, an innovative method is used to deal with complex changes. paper, initial contributions focus on integration two powerful techniques: Modified Boxing Match (MBM) algorithm XGBoost model, which a convolutional neural network. The...

This paper pointed out that it is wrong to take the outlet flue gas temperature of low economizer as exhaust in boiler efficiency calculation based on GB10184-1988. What's more, this proposed a new correction method, which decomposed economizer-air heater system into two hypothetical parts air preheater and pre condensed water equivalent calculation. method makes more concise, with no correction. It has positive reference value deal kind problem correctly.

By analyzing principle and method of wavelet denoising the Duffing oscillator , this paper presents a joint detection measurement system that was composed by oscillator. Simulation experiment shows using to detect weak signal from high noise background have more satisfactory result, further improve ability detecting signal. The result in will make good foundation for developing strong instrument.