Porous coordination polymers have received intensive attention for pollution abatement, such as dye removal, because of their high porosity and specific surface areas. However, the commonly used water-stable porous are microporous synthesized within organic solvents, which deters seriously widespread application. In this report, we developed a facile strategy synthesis mesoporous Zr-based polymer (Zr-BDC-CP) aqueous solutions. The morphology structure Zr-BDC-CP were characterized with...

Abstract In this letter, a circularly polarized antenna with wide overlapped axial ratio and gain beamwidth is proposed for upper hemispherical coverage. By bending half of the dipoles to vertical direction, connecting eight metal columns ground, half‐power (HPBW) all cut planes can be increased effectively. On basis, one reactive impedance structure applied as reflector achieve unidirectional radiation, well increase 3‐dB (ARBW) antenna. Miniaturized four‐feed networks are utilized provide...

In this paper, a filtering rat-race coupler (FRC) is presented, which features the merits of wideband response, good impedance matching at both input and output ports, isolation, high-frequency selectivity, small in-band phase difference error, wide stopband, size. It was composed two leading triple-mode resonators, one core section, λ/2 open-circuited transmission lines (TLs). The section consisted three λ/4 TLs short-circuited parallel coupled line (CL). resonator stub TLs. By loading as...

Abstract Monitoring mosquito density to predict the risk of transmission virus and develop a response in advance is an important part prevention efforts. This paper aims estimate accurately swarm count from given image. To this end, we proposed attention-based multi-scale counting model that consists feature extraction network (FEN) attention based regression (AMRN). The FEN uses VGG-16 extract low-level features mosquitoes. AMRN adopts convolutional neural network, with squeeze excitation...

In this paper, a dual-band circularly polarized (CP) antenna with wide axial ratio and gain beamwidths is proposed for high-precision BDS applications.The radiator consists of four groups dipoles, eight metal columns, reflector.The half-power beamwidth (HPBW) can be effectively increased by bending portion the dipole into an arc loading series columns on ground.Besides, reactive impedance structure (RIS) inserted serves as reflector to improve (ARBW) obtain unidirectional radiation.At same...

The characteristics of hydroxyl radicals ( • OH) frequently produced in the Fenton process and effects these on oxidation hydrophobic total petroleum hydrocarbons (TPH) soil are investigated. Twelve groups experiments conducted using two kinds crude‐oil‐contaminated samples (S1 S2) with different organic matter (SOM) contents. results show that decrease TPH increases by 6774 mg kg −1 (S1) 5875 (S2) frequent OH OHf). These times obtained single OHs) (S1: 3410 , S2: 2918 ). long‐chain alkanes...

To enhance the accuracy of detecting objects in front intelligent vehicles urban road scenarios, this paper proposes a dual-layer voxel feature fusion augmentation network (DL-VFFA). It aims to address issue misrecognition caused by local occlusion or limited field view for targets. The employs point cloud voxelization architecture, utilizing Mahalanobis distance associate similar clouds within neighborhood units. integrates and global information through weight sharing extract boundary each...

Ischemic stroke (IS) is a complex illness resulting from combination of numerous environmental and genetic risk factors. Recent reports have shed light on the vital role that platelets play in pathophysiology IS. Here, we aimed to explore potential platelet-related genes IS investigate effect immune microenvironment

The identification and quantification of effective source rocks are critical for hydrocarbon exploration, but traditional methods have limitations in lacustrine basins due to their complexity heterogeneity. We propose a geological modeling approach that combines geophysical techniques geochemical data delineate quantify resource potential. workflow includes mudstone classification, analysis, building predictive models, constructing 3D filtering rocks, basin simulation. Taking the Fushan...

In the southeastern Xuanlong sag of Northern China, Mesoproterozoic Xiamaling Formation's organic-rich black shale holds significant potential as a source rock. Through advanced techniques including elemental analysis, 13C NMR, XPS, FTIR, and XRD, we thoroughly characterized composition chemical structure kerogen. Our NMR analysis revealed kerogen's carbon makeup comprising 75.19% aliphatic carbon, predominantly methylene; 22.06% aromatic largely branched carbon; 2.75% carbonyl carbon. These...

In the paper, a wideband circularly polarized (CP) filtering antenna is proposed, which composed of four bent Vivaldi elements excited with sequential-rotated feeding technique.Since element has advantages high gain and wide bandwidth, it selected as radiation element.On this basis, two cross slots are etched on to increase at lower frequency band, method less effect overall performance applied for lowing profile antenna.To realize characteristic, quadrature four-feed network consisting one...

In this paper, tolerance and detection problems for the edge disconnection in consensus issues of discrete-time multi-agent systems with time-delay are investigated. We first discuss problems. For case strongly connected communication topology, faulty system can still achieve if connectedness is not changed as disconnection, but value might be different from original one. Especially, will consistent one topology undirected connected. addition, problem considered by transforming into...