Abstract Composite solid electrolytes have attracted significant interest because they overcome the defects of single‐component electrolytes. However, discontinuous ion transport and weak mechanical support caused by randomly distributed powders lead to inferior ionic conductivity poor strength. Herein, a hierarchically self‐assembled metal‐organic framework (MOF) network is designed provide continuous for composite polymer This unique structure achieved constructing well‐ordered MOF...

A novel phosphorus‐containing, nitrogen‐containing, and sulfur‐containing reactive flame retardant (BPD) was successfully synthesized by 1‐pot reaction. The intrinsic flame‐retardant epoxy resins were prepared blending different content of BPD with diglycidyl ether bisphenol‐A (DGEBA). Thermal stability, properties, combustion behaviors EP/BPD thermosets investigated differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), limited oxygen index (LOI) measurement, UL94...

Hyperspectral image (HSI) has rich spatial-spectral information, high spectral correlation and large redundancy between information. Due to the sparse background distribution of HSI, existing methods generally perform poorly for classification class pixels located in boundary areas land cover categories. This is largely because network vulnerable surrounding redundant information during training stage, leading inaccurate feature extraction thus poor generalization ability model. Based on...

An optical fiber humidity sensor with porous anodic alumina (PAA) film on single-mode tip is proposed and experimentally demonstrated. Relative-humidity (RH) sensing correlated the shift of interference fringe due to capillary condensation, which results in change effective refractive index PAA when exposed different RH environments. Experimental result shows that sensitivity 0.31 nm/%RH can be realized very good repeatability range 20%RH-90%RH. It concluded fiber-optic sensors thinner...

In hyperspectral images (HSIs), different land cover (LC) classes have distinct reflective characteristics at various wavelengths. Therefore, relying on only a few bands to distinguish all LC often leads information loss, resulting in poor average accuracy. To address this problem, we propose method called Cascaded Spatial Cross-Attention Network (CSCANet) for HSI classification. We design cascaded spatial cross-attention module, which first performs local and global features the context,...

The scenic byways in Western Sichuan are some of the most popular self-driving tourism destinations China. However, current network region is not well-coordinated with level regional development. This paper, based on travel digital footprints, uses methods such as spatial design analysis, GIS social analysis models, and econometric models to analyze accessibility behavior characteristics Sichuan. main research results follows: (1) exhibits significant variation, majority areas demonstrating...

Unlike conventional hyperspectral image (HSI) classification in general scenes, agricultural HSI poses greater challenges due to the increased occurrence of "same spectrum different object" and "different same phenomena caused by class similarities. Furthermore, dense spatial distribution land cover categories scenes mixing spatial–spectral features at crop boundaries add complexity HSIs. To tackle these issues, we propose SANet, a network designed enhance classification. SANet integrates...

Dual-cavity microstructure fiber optic hydrogen sensor based on evaporated Pt/WO(3) film was proposed and experimentally explored in this paper, which provides a novel solution to detect high concentration (10-30% H(2)). fabricated by splicer is composed of an inner air-cavity collapsed photonic crystal cavity. The has the advantages miniature structure, stable configuration, low cost. Based three-beam interference model verification experiments, compensation function fluctuation light...

Abstract Combined with the actual work, new metal matrix composite has characteristics of light weight, low thermal expansion (CTE), ultra-high conductivity, high specific strength, stiffness, good damping, etc. which is key to realize requirements miniaturization, lightweight, long life and reliability aerospace products. This paper introduces selection analysis practical application magnesium alloy in satellite antenna Antenna products based on will be more widely used field.

In this paper, poly (tetrahydrofuranyl ether diol) and trimethylolpropane (TMP) were used respectively as chain extender cross-linking agent to fabricate polyurethane resin. The morphology mechanical properties of the cured resin studied by dynamic FTIR spectra, universal testing machine, analysis (DMA) scanning electron microscopy (SEM). results indicated that comprehensive performance based on PTMG400/TMP system was greatly improved compared with TMP cross-linked system.

The main objectives of this study were to detecting the land use and cover change (LULC), using remote sensing techniques, then identify reasons for rangeland tree degradation in El Rawashda Forest, Gadarif State, Sudan. has conducted field experiment developed on an area 20 feddans that was affected by deterioration forest assess best method rehabilitation vegetation study. experimental divided into 5 blocks; each block consisted 4 treatments: grass seeds Talih (Acacia seyal var. seyal);...

We fabricate double-tapered optical fibre tips by the interfacial layer etching method. The is first etched means of meniscus-based to obtain one-tapered tip, which again between etchant and overlay a tip. formation mechanism second taper analysed. impacts time, HF concentration on cone angle are discussed. can be controlled time overlay. But has few angle. applied for contactless trapping particles.

In this paper, a series of two-component polyurethane resins were prepared by using polymethylene polyphenyl isocyanate (PMDI) and polypropylene glycol (PPG400) respectively as hard soft segment. order to further increase strength, stiffness heat resistance resin system, phthalic anhydride polyester polyol (PAPP) was used second The effects content, functionality molecular weight PAPP on mechanical properties PMDI-PPG mainly studied. results indicated comprehensive performance best in the...

Charging in semipublic area is an alternative to private charging. Through investigating related parties of EV charging infrastructure construction and operation areas, which include operator, property management company (PMC), users, business model a whole ecosystem established. Using the actual vehicle data acquired Sino-German project, constructed theoretical verified simulate analyze different scenarios. The analysis results show that operator hardly get profit short time at current...

A text mining based identification model for urban rail transit system infrastructure fault analysis is proposed the Fault and provide basis prevention, control diagnosis. The uses Naive Bayes algorithm used to segment long data which has been preprocessed, identifies cause of fault. results are displayed clearly in form word clouds. was experimentally verified by using 15 240 records AFC equipment faults (defects) from a certain group. 2018.

The numerical simulation method that pipe material forming in multi-process hot extrusion was researched by FEM software ANSYS-LSDYNA. In the paper craft parameters, such as friction, temperature, speed and heat up length of pipe, which affected effect were analyzed will provided theory reference when established.

Abstract Machine tools are important factor to determine the surface quality of workpiece, and online detection tool wear is great significance production processing. In this paper, turning taken as research object, evaluation index defined, system lathe based on machine vision designed. The workpiece processing, image acquisition, transmission, storage, processing completed in system. Aiming at problem state detection, an adaptive hybrid filtering method proposed order remove noise...

With the development and popularization of electric vehicles, charging demand for large-scale vehicles is an increasing challenge grid. Based on existing vehicle data, this paper establishes a model calculation estimates influence First, we established expanded it into station model. The used to calculate power single within 24 hours ratio vehicles. Since that equipped with piles do not strongly depend station, use SVM algorithm recognize these exclude them from data increase estimation...