Abstract Ion is one of the most common additives that can impart electrical conductivity to insulating hydrogels. The concurrent toughening effect ions, however, often neglected. This work reports extreme hydrogels via synergistic cations and anions, without need for specific structure design or adding other reinforcements. strategy equilibrate a physical double network hydrogel consisting both multivalent cation‐ kosmotropic anion‐sensitive polymers in salt solutions induce cross‐linking...

Abstract Swelling is ubiquitous for conventional hydrogels but not favorable many situations, especially underwater applications. In this study, an anti‐swelling and mechanically robust polyacrylic acid (PAAc)/gelatin composite hydrogel reported with a rapid gelation process (10 1 s) under mild conditions via the synergy of MXene‐activated initiation zirconium ion (Zr 4+ )‐induced cross‐linking, without requirement external energy input. The MXene found efficient to activate chain...

The development of an efficient delivery system for enhanced and controlled gene interference-based therapeutics is still facing great challenges. Fortunately, the flourishing field nanotechnology provides more effective strategies nucleic acid delivery. Here, triplex-forming oligonucleotide sequence its complementary strand were used to mediate self-assembly ultrasmall gold nanoparticles. obtained sunflower-like nanostructures exhibited strong near-infrared (NIR) absorption photothermal...

Abstract The rapid progress of information technology is accompanied by plenty embezzlement and forgery, but developing advanced encryption technologies to ensure security remains challenging. Phase separation commonly leads a dramatic change in the transmittance hydrophilic polymer networks, which potential method for often neglected. Here, taking polyacrylamide (PAAm) hydrogel system as typical example, facilely adjustable decryption via its regulable phase process ethanol/water mixed...

An accurate frequency estimator of complex sinusoid in additive white noise is proposed. It based on interpolation Fast Fourier Transform (FFT) and Discrete-Time (DTFT). Zero-padding firstly performed before the FFT sampled data, coarse estimate obtained by searching discrete index maximum spectrum line. Then fine employing line two DTFT sample values located left right side The correlation coefficients between noises arbitrarily spaced lines are derived, MSE calculation formula derived...

Reaction of 2,6-bis(3-butylbenzimidazol-1-ium)pyridine dibromide with silver oxide affords a dinuclear complex the type [L2Ag2]2+ [L = 2,6-bis(3-butylbenzimidazolin-2-ylidene)pyridine]. 1H NMR spectroscopic studies suggest that structure is also present in solution. Transmetalation silver-NHC PdCl2(CH3CN)2 yields mononuclear palladium [LPdCl]+, chelating C,N,C pincer ligand.

Abstract Starch‐based hydrogel is widely used as an excellent biocompatibility and biodegradability material. However, due to the disadvantages of poor mechanical properties, brittleness, low stretchability attribute that remains a challenge prepare multifunctional starch integrating high stretchability, strength, conducting capacity. In this study, macromolecular microspheres with various wettability are successfully incorporated into prepared using carboxymethyl polyacrylamide cross‐linked...

In response to the increasing prevalence of unmanned underwater vehicles, search and rescue technology has garnered significant attention in recent years. The intricate nature water environments, with their high currents, poor visibility, limited space, made existing devices heavily reliant on extensive human input and, at times, even cooperation those being rescued ensure efficient dependable rescues. This paper introduces design a high-speed anti-flow Underwater Search & Rescue Vehicle...

The endpoint carbon content is one of the most important target in BOF (Basic Oxygen Furnace) steelmaking production. In this study, a real time prediction method proposed for second blow period. Firstly, traditional time-based exponential decarburization model translated into an oxygen-based model. Then, valid data driven named case-based reasoning used to establish key parameter To improve precise model, mutual information (MI) based variable selection algorithm adopted choose variables as...

This letter studies the interference between even and odd subchannels in interleaved multiplexing optical fast orthogonal frequency-division system, which is caused by non-orthogonal demultiplexing transform at receiver. To eliminate this interference, frequency timing offsets are introduced deliberately receiver to form bases, coincide with discrete cosine sine transforms of type-IV. Thus, symbols can be demultiplexed without any subchannels, proposed design implemented efficiently....

In the context of renewable energy, maximum power point tracker (MPPT) is often used to increase solar efficiency, taking into account randomness and volatility energy due changes in temperature photovoltaic. all MPPT techniques, perturb & observe incremental conductance are widely controllers, because their simplicity ease operation. According internal structure photovoltaic cell output volt-ampere characteristic, this paper established circuit model establishes dynamic simulation...

The high peak-to-average power is one of the main drawbacks in OFDM systems. This letter proposes a partial shift mapping (PSM) method for peak reduction By utilizing properties discrete Fourier transform, proposed generates set candidate signals without additional complex multiplication and selects with minimum transmission. Analyses simulations confirm that PSM achieves satisfactory performance low complexity compared other kindred methods, example, selected transmit sequences.

Channel estimation is an important technical issue in mobile communication system, the performance and capacity of system are directly influenced by speed precision channel estimation. This paper introduced definition method currently existed firstly, then proposed a based on probability gain difference feature analysis wireless fading channel. has virtue high speed, low complexity strong real time character to environment.