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Flower-like NiCo2O4 consisting of nanosheets are synthesized by hydrothermal technique and subsequently surface-modified with a TiO2 ultrathin layer by a hydrolysis process at low temperature.doi:10.1039/c7ra09024b fatcat:kf7bzcpwi5hybots4c2r4k5thu
3D plum candy-like NiCoMnO4 microspheres have been prepared via ultrasonic spraying and subsequently wrapped by graphene through electrostatic self-assembly.doi:10.1039/c8ra08869a pmid:35558412 pmcid:PMC9092269 fatcat:4dibxv6gyzckpm35cbftff5weq
Si surface modification gets improved electrochemical performances for 18 650 cylindrical cells, especially at elevated temperature, which is attributed to the fact that Si can enable the LiFePO4 electrodes to suppress battery degradation.doi:10.1039/c7ra06027k fatcat:m3p44h3tovaidb7rlbgpuso4sm
This paper proposes a novel self-adaptation differential energy watermarking based on the Watson visual model, which inserts robust watermark into video streaming according to the differential energy theory. This algorithm can control the watermark's embedding intensity of sub-low AC coefficients in the video streaming adaptively based on the Watson visual model. And it also can be self-adaptive cheesed that the region should be embed watermarks according to the relationship between the energydoi:10.4304/jmm.4.3.153-160 fatcat:bnng6psipvbcpgz4h2nfzjpqbu
more »... djustable threshold and their differential energy. So watermark not only meets the non-visual perception, but also has the better robustness. Experiments show that this algorithm has strong robustness and security against the usual video attacks such as noise, filter and compression attack etc with low complexity of energy computation and high capacity.
Modeling and simulation of the morphology evolution of immiscible polymer blends during injection molding is crucial for predicting and tailoring the products' performance. This paper reviews the state-of-the-art progress in the multiscale modeling and simulation of injection molding of polymer blends. Technological development of the injection molding simulation on a macroscale was surveyed in detail. The aspects of various models for morphology evolution on a mesoscale during injectiondoi:10.3390/polym13213783 pmid:34771340 pmcid:PMC8588530 fatcat:qb2bn5kaejazlbgb4fas6kdnwi
more »... were discussed. The current scale-bridging strategies between macroscopic mold-filling flow and mesoscopic morphology evolution, as well as the pros and cons of the solutions, were analyzed and compared. Finally, a comprehensive summary of the above models is presented, along with the outlook for future research in this field.
The enhanced fluorescence of FGDY is considered to be induced by low phonon energy of fluoride, reducing non-radiative transition sites.doi:10.1039/c9ra02272d pmid:35515213 pmcid:PMC9064808 fatcat:pou4ixbmavcunpxisr7o7zxuye
The multi-functional nanomaterial constructed with more than one type of materials has gained a great attention due to its promising application. Here, a high white light photodetector prototype established with two-dimensional material (2D) and 2D nanocomposites has been fabricated. The 2D-2D nanocomposites were synthesized with SnSe nanoplate and graphene. The device shows a linear I-V characterization behavior in the dark and the resistance dramatically decreases under the white light.doi:10.1186/s11671-017-2021-0 pmid:28395477 pmcid:PMC5383919 fatcat:gres2s4jqbhxtbpmkmk62xe2g4
more »... rmore, the photosensitivity of the device is as large as 1110% with a rapid response time, which is much higher than pristine SnSe nanostructure reported. The results shown here may provide a valuable guidance to design and fabricate the photodetector based on the 2D-2D nanocomposites even beyond the SnSe nanoplate-graphene nanocomposites.
The spatial dispersion of individuals in a species is an important pattern that is controlled by many mechanisms. In this study we analyzed spatial distributions of tree species in a large-scale (20 ha) stem-mapping plot in a species-rich subtropical forest of China. O-ring statistic was used to measure spatial patterns of species with abundance 10. V 0Á10 , the mean conspecific density within 10 m of a tree, was used as a measure of the intensity of aggregation of a species. Our resultsdoi:10.1111/j.1600-0706.2008.16753.x fatcat:4ye45rzuoff7nmv33ms3xgicyy
more »... (1) aggregated distribution was the dominant pattern in the plot. The percentage of aggregated species decreased with increased spatial scale. (2) The percentages of significantly aggregated species decreased from abundant to intermediate and to rare species. Rare species was more strongly aggregated than common species. Aggregation was weaker in larger diameter classes. (3) Seed traits determined the spatial patterns of trees. Seed dispersal mode can influence spatial patterns of species, with species dispersed by both modes being less clumped than species dispersed by animal or wind, respectively. Considering these results, we concluded that seed dispersal limitation, self-thinning and habitat heterogeneity primarily contributed to spatial patterns and species coexistence in the forest.
The electronic oxygen regulator (EOR) is a new type of aviation oxygen equipment which uses electronic servo control technology to control breathing gas pressure. In this paper, the control method of EOR was studied, and the dynamic model of the aviation oxygen system was established. A disturbance-observer-based controller (DOBC) was designed by the backstepping method to achieve the goal of stable and fast breath pressure control. The sensitivity function was proposed to describe the effectdoi:10.3390/en14165189 fatcat:zc2n56ftibd5fhs7sr42v6372a
more »... inspiratory flow on breath pressure. Combined with the frequency domain analysis of the input sensitivity function, the parameters of the DOBC were analyzed and designed. Simulation and experiment studies were carried out to examine the control performance of DOBC in respiratory resistance and positive pressurization process under the influence of noise and time delay in the discrete electronic control system, which could meet the aviation physiology requirements. The research results not only verified the rationality of the application of DOBC in the breath control of EOR, but also proved the effectiveness of the control parameters design method according to the frequency domain analysis, which provided an important design basis for the subsequent study of EOR.
In this work, by taking commercial P25 hydrophilic titanium dioxide (TiO2) as a photocatalyst, the magnetic field effect (MFE) on the photodegradation rate of methyl orange is studied.doi:10.1039/d0ra08359c pmid:35423158 pmcid:PMC8694829 fatcat:e27tzifqbzehddujx33cmpuwie
Supplemental Figures S1−S4 (PDF) ■ AUTHOR INFORMATION Corresponding Authors Guanfeng Lin − Experimental Center of Teaching and Scientific Research, School of Laboratory Medicine and Biotechnology, Southern ...doi:10.1021/acs.analchem.0c00784 pmid:32323974 pmcid:PMC7202245 fatcat:v5vmoalgobalfkl626557fpuqu
AbstractRecently, researchers have focused on optoelectronics based on two-dimensional van der Waals materials to realize multifunctional memory and neuron applications. Layered indium selenide (InSe) semiconductors satisfy various requirements as photosensitive channel materials, and enable the realization of intriguing optoelectronic applications. Herein, we demonstrate InSe photonic devices with different trends of output currents rooted in the carrier capture/release events under variousdoi:10.1038/s41699-021-00241-0 fatcat:5vyhwrgtqzgnlkwirm6cxbvfny
more »... e voltages. Furthermore, we reported an increasing/flattening/decreasing synaptic weight change index (∆Wn) via a modulated gate electric field, which we use to imitate medicine-acting metaplasticity with effective/stable/ineffective features analogous to the synaptic weight change in the nervous system of the human brain. Finally, we take advantage of the low-frequency noise (LFN) measurements and the energy-band explanation to verify the rationality of carrier capture-assisted optoelectronics applied to neural simulation at the device level. Utilizing optoelectronics to simulate essential biomedical neurobehaviors, we experimentally demonstrate the feasibility and meaningfulness of combining electronic engineering with biomedical neurology.
The morphology of polymer blends plays a critical role in determining the properties of the blends and performance of resulting injection-molded parts. However, it is currently impossible to predict the morphology evolution during injection molding and the final micro-structure of the molded parts, as the existing models for the morphology evolution of polymer blends are still limited to a few simple flow fields. To fill this gap, this paper proposed a novel model for droplet morphologydoi:10.3390/polym13010133 pmid:33396929 pmcid:PMC7795296 fatcat:byzx5xplobgxdoupop7hj42unu
more »... n during the mold filling process of polymer blends by coupling the models on macro- and meso-scales. The proposed model was verified by the injection molding experiment of PP/POE blends. The predicted curve of mold cavity pressure during filling process agreed precisely with the data of the corresponding pressure sensors. On the other hand, the model successfully tracked the moving trajectory and simulated morphology evolution of the droplets during the mold-filling process. After mold-filling ended, the simulation results of the final morphology of the droplets were consistent with the observations of the scanning electron microscope (SEM) experiment. Moreover, this study revealed the underlying mechanism of the droplet morphology evolution through the force analysis on the droplet. It is validated that the present model is a qualified tool for simulating the morphology evolution of polymer blends during injection molding and predicting the final microstructure of the products.
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