High-Connected Ternary Metal-Organic Framework Platform: Synthesis, Structure, and Methane Storage Capacity.

Design and synthesis of a single metal-organic framework (MOF) that simultaneously achieves high gravimetric and volumetric working capacities for methane storage are crucial for advancing the use of natural gas as a vehicular fuel. However, this presents a significant challenge due to the inherent trade-off effect between the gravimetric and volumetric methane adsorption capacities of a single porous material. Herein, we initially synthesized a novel pyridine-carboxylic acid ligand and combined it with a trimeric iron cluster along with a series of dicarboxylic acid ligands of varying lengths or functionalities.

CO-selective molecular recognition in UiO-66 post-synthetic polyethylene glycol/amidoxime functionalization.

A diisocyanate-bridged polyethylene glycol modification and time-controlled amidoximation strategies are developed to engineer UiO-66 metal-organic frameworks (MOFs), achieving 115.3% and 130.0% CO/N adsorption selectivity enhancements escalated CO-MOF interactions.

Short-wall roadway backfill method for sustainable mining.

It is crucial to control surface subsidence and utilize solid wastes for sustainable mining. This paper proposes a short-wall roadway backfill mining method with advantages in avoiding surface subsidence and utilizing solid wastes. A mechanical model is developed to predict roof fractures based on tensile stress.

Response of extracellular polymeric substances in algal-bacterial granular sludge under salinity stress: Secretion behavior, structural properties, and protective roles.

The algal-bacterial granular sludge (ABGS) technology exhibits the advantages of low energy consumption and high shock load resistance. While ABGS regulates extracellular polymeric substances (EPS) secretion to cope with adverse conditions, the role of EPS in resisting salinity stress remains uncertain. This study investigated the response ofEPS in ABGS to salinity stress (0-5 %) by examining secretion behavior, structural properties, and protective roles.

Study on mining deformation and fracture response mechanism and rock pressure law of super thick composite key roof.

In order to study the movement and deformation law of the super thick composite key layer overlying the stope. Taking the geological conditions of Yima mining area as the background, a three-dimensional (3.6 m × 2.

Study of Multi-Objective Tracking Method to Extract Multi-Vehicle Motion Tracking State in Dynamic Weighing Region.

Dynamic weighing systems, an advanced technology for traffic management, are designed to measure the weight of moving vehicles without obstructing traffic flow. These systems play a critical role in monitoring freight vehicle overloading, collecting weight-based tolls, and assessing the structural health of roads and bridges. However, due to the complex road traffic environment in real-world applications of dynamic weighing systems, some vehicles cannot be accurately weighed, even though precise parameter calibration was conducted prior to the system's official use.

Analysis of Epilepsy Treatment Strategies Based on an Astrocyte-Neuron-Coupled Network Model.

: Epilepsy is a common neurological disorder that not only severely impacts patients' health but also imposes a significant burden on families and society. However, its pathogenesis remains unclear. Astrocytes play a crucial role in epileptic seizures and may serve as potential therapeutic targets.

MIMO radar DOA element position error correction method based on overlapping reference element matrix reconstruction.

Aiming at the problem of the degradation of angle estimation performance of the MUSIC algorithm due to the position error of the array element, this paper proposes a MIMO radar DOA array element position error correction method based on overlapping reference array element matrix reconstruction. This method uses overlapping virtual array elements as references, corrects the array element position error by phase difference, and constructs an error compensation matrix to eliminate the virtual array position error. At the same time, the nuclear norm optimization is introduced to reconstruct the Toeplitz structure to reduce the influence of system noise and array element disturbance on angle estimation, and the MUSIC algorithm is used to achieve accurate angle estimation.

Study on remediation capacity of typical forage grasses for Cu, Pb, and Cd contamination in coal gangue-accumulated soils.

Based on the ecological restoration needs of coal gangue accumulation areas, this study focuses on the potential application of in situ remediation techniques using forage plants. Taking the heavy metal pollution characteristics of the shallow soil (0-20 cm) in a typical coal gangue accumulation area in the Fengfeng mining district of Hebei as a prototype, pot experiments were conducted to investigate the heavy metal content in soil and plants under different heavy metal concentration gradients of Cu (14, 64, 100 mg/kg), Cd (1, 4, 8 mg/kg), and Pb (15, 38, 170 mg/kg) for both single and composite pollution types, revealing the heavy metal accumulation coefficients and translocation capabilities of alfalfa Medicago sativa L.(alfalfa) and Lolium perenne L.

Rational design of near-infrared carbon dots as polarity-sensitive fluorescent probes for imaging of lipid droplets.

Polarity plays important roles in establishing and reflecting numerous complex physiological functions and pathological effects associated with energy metabolism and cell signaling. Monitoring the variations in polarity, particularly the polarity of lipid droplets (LDs), is of great significance in biomedical research and clinical diagnosis. Herein, a novel near-infrared (NIR) carbon dots (CDs)-based fluorescent nanoprobe is presented to serve the stringent requirements of polarity targeting and imaging with high sensitivity, superior photostability, excellent permeability and biocompatibility.

Praseodymium-regulated microregion electron structures of BiWO nanosheets to construct non-radical platforms for the photocatalytic decontamination of water by hydrogen peroxide activation.

HO-based photo-Fenton-like systems are promising technologies for the generation of singlet oxygen (O) aimed at water decontamination. However, in conventional systems, the yield of O is relatively low owing to competition among free radicals. The oriented construction of a non-radical system could address this issue but challenging.

Effects of multi-microplastic mixtures on the performance of constructed wetland microbial fuel cells for wastewater treatment.

This study examined the effects of microplastics (MPs) on constructed wetland (CW) and constructed wetland microbial fuel cell (CW-MFC) with different configurations. Four mixed MP types including polyethylene, polypropylene, polystyrene, and polyvinyl chloride were introduced. Planted CW-MFC demonstrated the highest MP removal efficiency of 96.

Electrochemically reconstructable CuMn-bimetal-based metal-organic framework encapsulated CoO composite for selective methanol electrooxidation.

In this work, a CuMn-bimetal-based metal-organic framework (MOF) encapsulated CoO composite (CuMn-MOF@CoO) with a three-dimensionmal hierarchical structure formed by interwoven nanosheets was in-situ grown on nickel foam (NF) through a three-step fabrication method for the electrochemical methanol oxidation reaction(MOR). The characterizations revealed the phase transformation of CuMn-MOF during the electrochemical activation generated abundant hydroxides/hydroxyoxides (Cu(OH), Mn(OH), MOOH), which provided optimal architecture and real active sites for MOR. At the same time, the combination of CoO with the generated CuMn(OH) effectively enhanced the synergistic interactions between them, greatly hindering high-valent hydroxides formation, lowering methanol and intermediate adsorption energy barriers, thereby ensuring highly selective electrooxidation of methanol to formate with high activity.

Experimental study on instability and failure mechanism of sandstone under freeze-thaw and load.

Freeze-thaw damage is the primary cause of instability in rock slopes in cold regions, while the mechanical properties of rock are significantly influenced by loading rate. This study aims to investigate the evolution of mechanical behavior of sandstone under the coupled effects of loading rate and freeze-thaw cycles. Uniaxial compression tests were conducted on sandstone specimens subjected to different numbers of freeze-thaw cycles (0, 30, 50, 70) and loading rates (0.

Study on unfrostered water content and strength characteristics of saturated sandstone during thawing process.

After the construction of the frozen wall of the vertical shaft is completed, it will undergo a long thawing process. Accumulation of damage under load may lead to the rupture of frozen walls and cause engineering accidents. The changes in mechanical properties during the thawing process of frozen rocks are key issues in controlling the stability of frozen walls.

2,4-Difluorophenyl isothiocyanate as a redox mediator in the electrolyte for kinetically favorable Li-S batteries.

2,4-Difluorophenyl isothiocyanate (DPIC) was used as a redox mediator for a kinetically favorable electrolyte, and can boost the activation of insulating sulfur and sulfide, accelerate the bidirectional conversion reaction kinetics and restrict the undesirable shuttle effect, consequently ensuring high sulfur utilization and extended cycle lifespan of Li-S batteries.

The effect of cognitive load on time-to-contact estimation across different time structures.

Time-to-contact (TTC) estimation is critical for daily activities, assessing when a moving object will reach a location. TTC tasks are used to study motion processing. In the TTC tasks, time structure () refers to the ratio of the durations of the motions in two phases: (a) one in which the stimulus is visible before it reaches occlusion point and (b) one in which it is invisible after it reaches occlusion point.

Nontargeted Analysis Reveals Organofluorine Pharmaceutical Compounds Responsible for Formation of Toxic Disinfection Byproducts in a Drinking Water Treatment Plant in China.

Toxic disinfection byproducts (DBPs) formed during chlorination are a significant concern for drinking water safety. These compounds were analyzed using nontargeted methods, and their chemical formulas and structures were determined through tandem mass spectrometry combined with a novel fragmental chain characterization (FCC) algorithm. This FCC algorithm significantly improved annotation rates, achieving a four-fold increase compared to traditional mass spectral matching strategies.

Potentialities of manganese ore and iron-carbon particles for pharmaceuticals and personal care products removal in electroactive constructed wetland.

This study explores the use of manganese ore, iron-carbon particles (Fe-C), and gravel as anode fillers in electroactive constructed wetlands (ECWs) to treat wastewater containing pharmaceuticals and personal care products (PPCPs) including ciprofloxacin (CIP), ofloxacin (OFL), and naproxen (NPX), while also assessing bioelectricity production. Although the presence of PPCPs reduced pollutant removal and electricity generation, ECWs outperformed conventional CWs. Specifically, Fe-C ECWs (FC-ECWs) achieved high COD and NPX removal efficiencies of 90.

Research on creep characteristics of double fractured rock under freeze-thaw action.

Open rock masses are subject to prolonged loading and freeze-thaw cycles in cold regions. In this study, we take saturated fissured red sandstone as object to investigate the long-term mechanical response characteristics of fractured rock under freeze-thaw conditions. Experimental tests were conducted to analyze the creep characteristics of the rock after freeze-thaw cycles, considering different freeze-thaw frequencies and fracture orientations.

Co-Doping Effects on the Electronic and Optical Properties of β-GaO: A First-Principles Investigation.

To meet the demands for functional layers in inverted flexible perovskite solar cells, high-performance formamidinium-based perovskite solar cells, and high-performance photodetectors in future applications, it is crucial to appropriately reduce the bandgap of third-generation wide-bandgap semiconductor materials. In this study, we first optimized doping sites through Ag-Cl and Ag-S configurations to establish stable substitution patterns, followed by density functional theory (DFT) calculations using the Generalized Gradient Approximation with the Perdew-Burke-Ernzerhof (GGA-PBE) functional, implemented in the Vienna Ab initio Simulation Package (VASP). A plane-wave basis set with a cutoff energy of 450 eV and a 3 × 4 × 3 Γ-centered k-mesh were adopted to investigate the effects of Mg-Cl, Mg-S, Zn-Cl, and Zn-S co-doping on the structural stability, electronic properties, and optical characteristics of β-GaO.

A Convolution-Based Coding Metasurface for Wide-Angle Beam Steering for Enhanced 5G Wireless Communications.

With the rapid development of 5G communication technology, there is an increasing demand for high-performance antennas and beam control technologies, making the development of novel metamaterial structures capable of precise electromagnetic wave manipulation a current research hotspot. This paper presents a coding metasurface specifically designed for 5G communication applications, operating at a frequency of 3.5 GHz.

Design of Small-Sized Spiral Slot PIFA Antenna Used Conformally in Laminated Body Tissues.

This paper presents a novel Spiral Slot Planar Inverted-F Antenna (SSPIFA) specifically designed for telemedicine and healthcare applications, featuring compact size, biocompatible safety, and high integration suitability. By replacing the conventional top metal patch of a Planar Inverted-F Antenna (PIFA) with a slot spiral radiator whose geometry is precisely matched to the ground plane, the proposed antenna achieves a significant size reduction, making it ideal for encapsulation in miniaturized medical devices-a critical requirement for implantation scenarios. Tailored for the ISM 915 MHz band, the antenna is fabricated with a four-turn slot spiral etched on a 30 mm-diameter dielectric substrate, achieving an overall height of 22 mm and an electrically small profile of approximately 0.

Preparation of Polypyrrole/Montmorillonite/Polypropylene Composite Membranes and Investigation of Their Adsorption Performance for Methyl Orange and Pb.

This study investigates the efficient and recyclable use of polymer-based membrane materials in wastewater treatment, focusing on calcium-based montmorillonite (Ca-MMT), pyrrole (Py), and polypropylene (PP). Through sodium activation, organic modification, pyrrole intercalation, and in situ polymerization, polypyrrole/montmorillonite (PPy/MMT) was synthesized. A polypyrrole/montmorillonite/polypropylene composite membrane (PPy/MMT/PP) was then fabricated using melt compression and coating techniques for pollutant adsorption.

Quantitative evaluation and prediction of the relative complexity of Sangshuping coal mine tectonics in the Hancheng mining area.

In this paper, the relative complexity of the tectonics in the Sangshuping coal mine was studied. On the basis of the assumption of equal blocks, using entropy function analysis and stepwise regression analysis, an empirical formula for quantitatively evaluating structural relative complexity was established from the structural characteristics in the exposed area, and then the formula was applied to the prediction of relative tectonic complexity in the unexposed area. The results are as follows.