摘要：
Anisotropic plasmonic metasurfaces have attracted broad research interest since they possess novel optical properties superior to natural materials and their tremendous design flexibility. However, the realization of multi-wavelength selective plasmonic metasurfaces that have emerged as promising candidates to uncover multichannel optical devices remains a challenge associated with weak modulation depths and narrow operation bandwidth. Herein, we propose and numerically demonstrate near-infrared multi-wavelength selective passive plasmonic switching (PPS) that encompasses high ON/OFF ratios and strong modulation depths via multiple Fano resonances (FRs) in anisotropic plasmonic metasurfaces. Specifically, the double FRs can be fulfilled and dedicated to establishing tailorable near-infrared dual-wavelength PPS. The multiple FRs mediated by in-plane mirror asymmetries cause the emergence of triple-wavelength PPS, whereas the multiple FRs governed by in-plane rotational asymmetries avail the implementation of the quasi-bound states in the continuum-endowed multi-wavelength PPS with the ability to unfold a tunable broad bandwidth. In addition, the strong polarization effects with in-plane anisotropic properties further validate the existence of the polarization-resolved multi-wavelength PPS. Our results provide an alternative approach to foster the achievement of multifunctional meta-devices in optical communication and information processing.
摘要：
A series of heterostructured materials with variable ratio of 316 powders in 18Ni300 powders were prepared by laser melting deposition (LMD). The microstructural evolution and its influence on tensile features were explored before/after aging treatment or solution-aging treatment. The results indicated that the fraction of g phase was increased gradually with increasing 316SS, and dislocation caused by the deformation could be migrated and annihilated within the region of g phase, second phase strengthening could contribute to excellent elongation for 18Ni300 maraging steel. The elongation of the AF4 sample was 235.2% higher than that of the AF0 sample when a 37.5% reduction in the ultimate tensile strength occurred. In addition, thermal stress could exist in the as-cladded sample, an appropriate heat treatment could release the thermal stress and precipitate nanoscale intermetallic compound. Their synergistic effect could contribute to overcoming the strength-elongation trade-off. A relatively ideal sample, a discontinuous g phase surrounded by a phase, which displayed high strength of 1678.4 MPa with high elongation of 10.9% after solution-aging treatment. Compared with laser cladded 18Ni300 maraging steel, a 41.7% increment in the elongation was obtained at the cost of 11.3% reduction in ultimate tensile strength. & COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC
通讯机构：
[Fang Yu; Haiqing Zhou] K;Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Key Laboratory for Matter Microstructure and Function of Hunan Province, Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China
关键词：
seawater splitting;electrocatalyst;bifunctional water splitting;non-noble metal;porous material
摘要：
Given the abundant reserves of seawater and the scarcity of freshwater, real seawater electrolysis is a more economically appealing technology for hydrogen production relative to orthodox freshwater electrolysis. However, this technology is greatly precluded by the undesirable chlorine oxidation reaction and severe chloride corrosion at the anode, further restricting the catalytic efficiency of overall seawater splitting. Herein, a feasible strategy by engineering multifunctional collaborative catalytic interfaces is reported to develop porous metal nitride/phosphide heterostructure arrays anchoring on conductive Ni2P surfaces with affluent iron sites. Collaborative catalytic interfaces among iron phosphide, bimetallic nitride, and porous Ni2P supports play a positive role in improving water adsorption/dissociation and hydrogen adsorption behaviors of active Fe sites evidenced by theoretical calculations for hydrogen evolution reactions, and enhancing oxygenated species adsorption and nitrate-rich passivating layers resistant to chloride corrosion for oxygen evolution reaction, thus cooperatively propelling high-performance bifunctional seawater splitting. The resultant material Fe2P/Ni1.5Co1.5N/Ni2P performs excellently as a self-standing bifunctional catalyst for alkaline seawater splitting. It requires extremely low cell voltages of 1.624 and 1.742 V to afford current densities of 100 and 500 mA/cm2 in 1 M KOH seawater electrolytes, respectively, along with superior long-term stability, outperforming nearly all the ever-reported non-noble bifunctional electrocatalysts and benchmark Pt/IrO2 coupled electrodes for freshwater/seawater electrolysis. This work presents an effective strategy for greatly enhancing the catalytic efficiency of non-noble catalysts toward green hydrogen production from seawater electrolysis.
通讯机构：
[Jinghao Huang] S;School of Mechanical Engineering, University of South China, Hengyang, Hunan 421001, China<&wdkj&>Hunan Provincial Key Laboratory of Emergency Safety Technology and Equipment for Nuclear Facilities, University of South China, Hengyang, Hunan 421001, China
关键词：
Oxidation behavior;Cr-coated Zr-4 alloy;Multi -arc ion plating;Cr-Zr diffusion;Oxidation weight gain
摘要：
The oxidation behavior of Cr-coated Zr-4 alloy is studied in air environment at temperatures ranging from 10 0 0 degrees C to 120 0 degrees C and for oxidation times ranging from 1 h up to 4 h. The oxidation weight gain, sample appearance, surface and cross-sectional microstructure, Cr-Zr diffusion and phase at different oxidation times for the three temperatures were analyzed in detail. The results reveal that the oxidation weight gain is parabola with oxidation time, and the parabolic rate constant increases with the increase of oxidation temperature. At 10 0 0 degrees C and 1100 degrees C, the Cr coating can provide oxidation protection for the internal Zr-4 alloy after 4 h of oxidation. While at 1200 degrees C, Cr coating can only provide effective oxidation protection for the internal Zr-4 alloy for 1 h. At 10 0 0 degrees C and 1100 degrees C, the thickness of the Cr-Zr diffusion layer increases linearly with the oxidation time, while at 1200 degrees C, the thickness of the Cr-Zr diffusion layer increases linearly with the oxidation time after 1-3 h of oxidation, and after 4 h of oxidation, it suddenly increases sharply. And the XRD results imply that the preferred orientation of Cr 2 O 3 grains is related to the oxidation temperature.
期刊：
Progress in Organic Coatings,2023年183:107819 ISSN：0300-9440
通讯作者：
Li, ZY;Wang, XZ;Ying, L
作者机构：
[Li, ZY; Li, Zhenye; Kang, Xiaomin; Wang, Gaoyang; Zhang, Meng] Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.;[Wang, Xingzhu; Wang, XZ] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Ying, Lei; Ying, L] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China.
通讯机构：
[Li, ZY ; Wang, XZ ] U;[Ying, L ] S;Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China.
关键词：
Titanium dioxide;Hole transport layer;Polymer solar cells;Power conversion efficiency;Stability
摘要：
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been widely served as the state-of-art hole transport layer (HTL) for high performance organic solar cells (OSCs) due to its easy solution processability, excellent hole extraction ability, and well compatibility with various active layers. However, PEDOT:PSS shows several drawbacks such as relatively moderate conductivity and optical transparency, acidity, and reactivity, which directly limits the improvement of device performance and leads to the deterioration of device stability. In this work, metal oxide titanium dioxide (TiO2) was doped into the conventional HTL-material PEDOT:PSS, which simultaneously boosted the power conversion efficiency (PCE) and stability of OSCs based on PBDB-T:N2200. The simultaneous improvement in PCE and stability is originated from the effectively improved light trans-mittance and conductivity of PEDOT:PSS, increased hole extraction of the active layer, as well as the optimized ohmic contact between the interface layer and the electrode. In addition, the TiO2 doping PEDOT:PSS strategy is proved to be general to a variety of OSCs systems, which is expected to bring new opportunities for the devel-opment of high performance HTL, so as to promote the commercialization of OSCs.
通讯机构：
[Chen, Y ] U;Univ South China, Coll Mech Engn, Hengyang 421101, Peoples R China.
关键词：
FeCrAl coating;numerical simulation;temperature field analysis;laser micromelting;laser process parameters;surface morphology
摘要：
Laser micromelting (LMM) technology allows for the remelting of pre-positioned coatings on the surface of a specimen to form a metallurgical bond with the substrate material, significantly improving the coating's film-base bond. However, the high energy input from the laser modification process can cause severe element diffusion, rendering the coating susceptible to deformation and cracking. This can be mitigated by controlling the laser power, scanning speed, and offset of the LMM process. The temperature and stress fields of the samples in the LMM process were analyzed via finite element simulation. The effects of the LMM process parameters on the coating morphology were analyzed in conjunction with experiments. The results indicated that the laser power significantly affected the morphology of the coating after remelting, and a higher scanning speed was more likely to cause the coating to accumulate stress. Additionally, a smaller offset inhibited crack generation. At a laser power of 30 W, a scanning speed of 1200 mm/min, and a scanning spacing of 0.035 mm, the surface of the coating had no obvious defects and was relatively flat, and the adhesion and corrosion resistance were significantly improved. This study provides valuable guidance for improving the preparation of micron-sized protective coatings on Zr alloy surfaces.
关键词：
valley topological refraction;edge state;elastic wave;phononic crystals
摘要：
Valley topological refraction material (TRM) of elastic wave and its direction signal transmittance with robustness against structural disturbance is crucial for various applications such as communication, navigation and detection devices for medical and industrial purpose. However, the existing TRM is limited by the single topological band, which obviously hinders the exploration of the multi-band topological ultrasonic devices to guarantee its efficiency and stability. Here, we demonstrate the dual-band valley TRM for elastic waves, in which the valley edge states and their robustness are investigated. Furthermore, the topological refractions of the valley edge states from the interface into the free space at zigzag termination in two frequency bands are explored, where the mode conversion of the bulk elastic wave occurs at interface termination. Interestingly, the full mode conversion from longitudinal to transverse waves is revealed in the low frequency band while the non-full mode conversion between the longitudinal and transverse takes place in the high frequency band. The researched dual-band elastic TRM could facilitate the potential applications in multi-band and multi-directional devices.
摘要：
Gallium nitride (GaN) is a hard and brittle single crystal and shaping it into thin substrates for semiconductor applications is challenging. The quality of the machined surface can vary depending on the cutting orientation, primarily due to the hexagonal lattice structure of GaN. Therefore, understanding how crystallite orientation affects the cutting performance is crucial before developing a cost-effective machining process for GaN. This study used molecular dynamics (MD) simulation to investigate the cutting of GaN along different crystal orientations. Single grit cutting was performed to validate the simulation results. The simulation revealed distinct outcomes for different cutting directions. When cutting on a-plane or along the [-2110] direction on m-plane, removal efficiency was enhanced due to lower cutting resistance, and more dislocations were generated in the subsurface compared to other cutting directions. However, less phase transition and amorphization were induced, indicating lower energy consumption and smaller forces or stresses involved. Conversely, the cutting on c-plane or along the [0001] direction on m-plane showed the potential for achieving better surface integrity. This study provided valuable insights into the effect of crystallite orientation on the cutting performance of GaN and demonstrated that appropriate selection of cutting directions could result in improved surface quality, which are valuable for developing cost-effective machining technologies for GaN single crystals.
摘要：
Proper disposal of uranium-containing waste is of utmost importance for safeguarding the environment and human health. In this study, we proposed a novel zero-dimensional (0D)/two-dimensional (2D) nanocomposite material, nZVC/Ti(3)C(2), composed of nano zero-valent copper (nZVC) nanoparticles loaded onto Ti(3)C(2) MXene nanoflakes, which was prepared using a simple in situ chemical reduction method. The uniform dispersion of 0D nZVC nanoparticles, with a size of approximately 5nm, onto the 2D ultrathin Ti(3)C(2) MXene effectively prevented agglomeration and corrosion of nZVC. This unique configuration provided numerous adsorption sites for UO(2)(2+)and facilitated a fascinating charge channel for reducing adsorbed UO(2)(2+) into low-mobilized UO(2) by nZVC. Under the synergistic effect of Ti(3)C(2) MXene and nZVC, remarkable efficiency and selectivity of nZVC/Ti(3)C(2) for U (VI) removal were demonstrated, which exhibited an exceptional adsorption capacity of up to 360mg/g, coupled with a high removal efficiency of 97.5% and rapid kinetics. Importantly, the presence of humic acid did not significantly affect the U (VI) removal efficiency of the composite because of the reduction effect of nZVC. The underlying mechanism of U (VI) removal was elucidated, revealing the involvement of reductive immobilization in the form of UO(2) (as high as 73.6%), inner-sphere surface complexation, and hydrolytic precipitation. This mechanism was dependent on the availability of active nZVC and the solution's pH. These findings highlight the potential of nZVC/Ti(3)C(2) composites as efficient decontaminants for radioactive wastewater, thus contributing to advancements in environmental remediation endeavors.
摘要：
This paper investigates the fluid pressure response at the outlet of a vertical fluid delivery straight pipe under random axial vibration. Based on the classical fluid-structure interaction (FSI) 4-equation model and forced vibration theory, the FSI equations of motion of the pipe under random axial vibration are established. Then, the variance of the pressure response at the pipe outlet is solved by combining the pseudo-excitation method and the characteristic line method. The correctness of the proposed method is verified by comparing the results obtained by the proposed method with the Monte Carlo simulation method. Since the pseudo-excitation method can directly obtain the pressure variance without many sample calculations, the method in this paper has high computational efficiency. The influence laws of fluid velocity, pressure, pipe structural parameters, and power spectral density of random vibration on the pressure response of pipe outlet are analyzed. The results show that the effect of random axial vibration on the fluid pressure response at the pipe outlet is significant and cannot be ignored. Increasing the pipe's inner diameter or shortening the pipe's length is beneficial in reducing the fluctuation of the pressure response at the outlet of the pipe. The analytical method in this paper can effectively analyze the outlet pressure of the pipe under random axial excitation and can provide a theoretical basis for reducing the fluid pressure fluctuation in the pipe under random vibration.
摘要：
An effective nonlinear interval sequential quadratic programming method is proposed to provide an efficient tool for uncertain inverse problems. Assisted by the ideology of sequential quadratic programming and dimension -reduction analysis theory, the interval inverse problem is transformed into several interval arithmetic and deterministic optimizations, which could enhance computational efficiency without losing much accuracy. The novelty of the proposed method lies in two main aspects. First, an alternate updating strategy is proposed to identify the radii and midpoints of the interval inputs in each cycle, which could reduce the number of iterative steps. Second, the standard quadratic models are constructed based on the dimension-reduction analysis results, rather than the second-order Taylor expansion. Therefore, the interval arithmetic can be applied to efficiently calculate the interval response, which avoids the inner optimization. Moreover, a novel iterative mechanism is developed to accelerate the convergence rate of the proposed method. Finally, two numerical examples and an engineering application are adopted to verify its feasibility, accuracy and efficiency.
摘要：
Temperature-dependent material attrition and subsurface lattice damage of single-crystal AlN at various scratching depths/forces are investigated at atomic level using molecular dynamics simulation. An ultimate removal precision of depth down to monolayer of AlN is achieved based on the present temperature-dependent critical conditions. The number of worn atoms, positively influenced by temperature due to the reduction of hardness, increases exponentially with increasing normal force in the plastic domain. Archard-type wear coefficient K values calculated at different temperatures increase linearly with normal force, and the slope is independent of temperature. Independently of load and temperature, a wear coefficient normalized with the tangential contact area, K/Atang, is developed to interpret the removal efficiency of AlN substrate with diamond abrasive.
摘要：
Aqueous zinc-ion batteries (ZIBs) have attracted significant attention for grid-scale energy applications due to their low cost, intrinsic safety, and environmental friendliness. However, the energy density of current ZIBs is impeded by unsatisfactory performance of cathodes, due to their limited areal capacity and low active material loading, especially at extreme environments. Herein, an electrochemical activation strategy is put forward to build high energy density ZIBs by designing a flexible cathode composed of NH4+ pillared ammonium vanadate nanosheets on carbon cloth (NVMCE@CC). The electrochemical activation process with high anodic potential (> 1.5 V vs. Zn2+/Zn) guarantees the effective conversion of low-valent to high-valent vanadium and promotes the utilization of large amounts of vanadium elements in the NVMCE@CC composite. Meanwhile, the pillared NH4+ ions expand the interlayer spacing and enhance the structural integrity through the hydrogen bonding between NH4+ and V-O framework. Consequently, the activated NVMCE@CC cathode with a high mass-loading of-5.2 mg cm-2 delivers large areal capacity (-1.74 mAh cm-2 at 1 mA cm-2) and superior cycling stability (capacity retention of 72.1% after 1500 cycles). Importantly, the flexible cathode shows admirable capacities of 0.52 mAh cm-2 at 60 degrees C and 0.55 mAh cm-2 at -10 degrees C, respectively. Moreover, the NVMCE@CC//Zn@CC quasi-solid-state battery demonstrates excellent safety performance and performs well in extreme situations, including bending, cutting, hammering, and washing. This work provides enlightenment for the development of large-areal-capacity vanadium-based cathode materials for practical ZIBs.
作者机构：
[Lei, Zeyong; Deng, Jian; Lei, ZY; Zhong, Lin] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Wang, Guolong; Deng, Jian] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.;[Lei, Jieheng] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Zhao, Mu] China Nucl Ind 24 Construct Co Ltd, Beijing 102400, Peoples R China.
通讯机构：
[Lei, ZY ] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
304SS;cobalt;deposition;spinel;primary loop
摘要：
The radioactive corrosion products (58)Co and (60)Co in the primary loops of pressurized water reactors (PWRs) are the main sources of radiation doses to which workers in nuclear power plants are exposed. To understand cobalt deposition on 304 stainless steel (304SS), which is the main structural material used in the primary loop, the microstructural characteristics and chemical composition of a 304SS surface layer immersed for 240 h in borated and lithiated high-temperature water containing cobalt were investigated with scanning electron microscopy (SEM), X-ray diffraction (XRD), laser Raman spectroscopy (LRS), X-ray photoelectron spectroscopy (XPS), glow discharge optical emission spectrometry (GD-OES), and inductively coupled plasma emission mass spectrometry (ICP-MS). The results showed that two distinct cobalt deposition layers (an outer layer of CoFe(2)O(4) and an inner layer of CoCr(2)O(4)) were formed on the 304SS after 240 h of immersion. Further research showed that CoFe(2)O(4) was formed on the metal surface by coprecipitation of the iron preferentially dissolved from the 304SS surface with cobalt ions from the solution. The CoCr(2)O(4) was formed by ion exchange between the cobalt ions entering the metal inner oxide layer and (Fe, Ni) Cr(2)O(4). These results are useful in understanding cobalt deposition on 304SS and have a certain reference value for exploring the deposition behavior and mechanism of radionuclide cobalt on 304SS in the PWR primary loop water environment.
摘要：
A new method of numerical simulating prediction and decontamination effect evaluation for abrasive jet decontamination to radioactively contaminated metal is proposed. Based on the Computational Fluid Dynamics and Discrete Element Model (CFD-DEM) coupled simulation model, the motion patterns and distribution of abrasives can be predicted, and the decontamination effect can be evaluated by image processing and recognition technology. The impact of three key parameters (impact distance, inlet pressure, abrasive mass flow rate) on the decontamination effect is revealed. Moreover, here are experiments of reliability verification to decontamination effect and numerical simulation methods that has been conducted. The results show that: 60Co and other homogeneous solid solution radioactive pollutants can be removed by abrasive jet, and the average removal rate of Co exceeds 80%. It is reliable for the proposed numerical simulation and evaluation method because of the well goodness of fit between predicted value and actual values: The predicted values and actual values of the abrasive distribution diameter are 057 and 055; the total coverage rate is 26.42% and 23.50%; the average impact velocity is 81.73 m/s and 78.00 m/s. Further analysis shows that the impact distance has a significant impact on the distribution of abrasive particles on the target surface, the coverage rate of the core area increases at first, and then decreases with the increase of the impact distance of the nozzle, which reach a maximum of 14.44% at 300 mm. It is recommended to set the impact distance around 300 mm, because at this time the core area coverage of the abrasive is the largest and the impact velocity is stable at the highest speed of 81.94 m/s. The impact of the nozzle inlet pressure on the decontamination effect mainly affects the impact kinetic energy of the abrasive and has little impact on the distribution. The greater the inlet pressure, the greater the impact kinetic energy, and the stronger the decontamination ability of the abrasive. But in return, the energy consumption is higher, too. For the decontamination of radioactively contaminated metals, it is recommended to set the inlet pressure of the nozzle at around 0.6 MPa. Because most of the Co elements can be removed under this pressure. Increasing the mass and flow of abrasives appropriately can enhance the decontamination effectiveness. The total mass of abrasives per unit decontamination area is suggested to be 50 g because the core area coverage rate of the abrasive is relatively large under this condition; and the nozzle wear extent is acceptable. (c) 2023 Korean Nuclear Society, Published by Elsevier Korea LLC. This is an open access article under the
作者机构：
[Tang, Dewen; Qian, Jian] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Tang, DW ] U;Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
关键词：
point cloud registration;deep learning;attention mechanism
摘要：
The problem of registering point clouds in scenarios with low overlap is explored in this study. Previous methodologies depended on having a sufficient number of repeatable keypoints to extract correspondences, making them less effective in partially overlapping environments. In this paper, a novel learning network is proposed to optimize correspondences in sparse keypoints. Firstly, a multi-layer channel sampling mechanism is suggested to enhance the information in point clouds, and keypoints were filtered and fused at multi-layer resolutions to form patches through feature weight filtering. Moreover, a template matching module is devised, comprising a self-attention mapping convolutional neural network and a cross-attention network. This module aims to match contextual features and refine the correspondence in overlapping areas of patches, ultimately enhancing correspondence accuracy. Experimental results demonstrate the robustness of our model across various datasets, including ModelNet40, 3DMatch, 3DLoMatch, and KITTI. Notably, our method excels in low-overlap scenarios, showcasing superior performance.
摘要：
In order to minimize the gaps between the direct laser deposition channels and improve the quality and performance of the formed parts, the process of direct laser deposition is utilized in laser additive manufacturing to create sequential, single- and double-channel deposition layers on 304 stainless steel plates. Under the premise of keeping the layer rate and defocusing amount unchanged, this study investigates the effects of laser power, scanning speed, and powder feeding rate on the morphology and inclusions of single- and double-channel deposited layers. The aim is to determine the optimal process parameter values for direct laser deposition of single-layer, single-channel Inconel 738. The effects of the three process parameters on the response values were investigated using a multi-factor, multi-level experimental design. The evaluation indexes for the analysis included the deposited layer wetting angle and aspect ratio. The analysis involved one-way extreme analysis and ANOVA analysis. The optimal process parameters are a laser power of 550 similar to 750 W, a scanning speed of 7 similar to 13 mm/s, and the powder feeding rate was 2.1 similar to 4.33 g/min. At the same time, the relationship between surface tension and gravity was integrated with the spherical coronal model and Young's equation to develop a mathematical model of the direct laser deposition process at a theoretical level. The mathematical model of the direct laser deposition process was utilized to analyze the correlation between the geometric parameters of the cross-section of the deposited layer. This analysis provides a valuable data reference for future Inconel 738 direct laser deposition.
作者机构：
[Li, ZY; Li, Zhenye; Jiang, Yufeng] Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Li, ZY ] U;Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.
关键词：
Organic solar cells;Morphology;Additives
摘要：
Bulk heterojunction (BHJ) organic solar cells (OSCs) have achieved rapid development in the past decades, and their power conversion efficiency (PCE) has been improved to nearly 20%. The improvement of PCE is often inseparable from the morphology optimization of the active layer. Using different types of additives in the preparation of active layer is one of the most common strategies to optimize the morphology of active layer. In recent years, the application of additives in OSCs has become a hot research direction in the field of OSCs, but there are still great challenges in the in-depth understanding of the action mechanism of additives. Starting from the importance of morphology regulation for performance improvement of OSCs, this review summarizes the application research progress of additives (including solvent additives and solid additives) in OSCs and the regulation mechanism of active layer morphology. The current problems in the development of efficient additives were also discussed, which can provide guidance for the future development of additives in OSCs.
摘要：
Industrial robots need to accurately identify the position and rotation angle of the handwheel of chemical raw material barrel valves during the process of opening and closing, in order to avoid interference between the robot gripper and the handwheel. This paper proposes a handwheel keypoint detection algorithm for fast and accurate acquisition of handwheel position and rotation pose. The algorithm is based on the Keypoint R-CNN (Region-based Convolutional Neural Network) keypoint detection model, which integrates the lightweight mobile network MobileNetV3, the Coordinate Attention module, and improved BiFPN (Bi-directional Feature Pyramid Network) structure to improve the detection speed of the model, enhance the feature extraction performance of the handwheel, and improve the expression capability of small targets at keypoint locations. Experimental results on a self-built handwheel dataset demonstrate that the proposed algorithm outperforms the Keypoint R-CNN model in terms of detection speed and accuracy, with a speed improvement of 54.6%. The detection accuracy and keypoint detection accuracy reach 93.3% and 98.7%, respectively, meeting the requirements of the application scenario and enabling accurate control of the robot's rotation of the valve handwheel.
