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Daytime radiative cooling (DRC) materials offer a sustainable approach to thermal management by exploiting net positive heat transfer to deep space. While such materials typically have a white or mirror‐like appearance to maximize solar reflection, extending the palette of available colors is required to promote their real‐world utilization. However, the incorporation of conventional absorption‐based colorants inevitably leads to solar heating, which counteracts any radiative cooling effect. In this work, efficient sub‐ambient DRC (Day: −4 °C, Night: −11 °C) from a vibrant, structurally colored film prepared from naturally derived cellulose nanocrystals (CNCs), is instead demonstrated. Arising from the underlying photonic nanostructure, the film selectively reflects visible light resulting in intense, fade‐resistant coloration, while maintaining a low solar absorption (≈3%). Additionally, a high emission within the mid‐infrared atmospheric window (>90%) allows for significant radiative heat loss. By coating such CNC films onto a highly scattering, porous ethylcellulose (EC) base layer, any sunlight that penetrates the CNC layer is backscattered by the EC layer below, achieving broadband solar reflection and vibrant structural color simultaneously. Finally, scalable manufacturing using a commercially relevant roll‐to‐roll process validates the potential to produce such colored radiative cooling materials at a large scale from a low‐cost and sustainable feedstock. Structurally colored films capable of full‐time sub‐ambient radiative cooling are prepared from a composite of cellulose nanocrystals and ethylcellulose. The distinct nanostructure within each layer allows for selective reflection of visible light generating color, whilst maintaining a broadband solar reflection. Finally, by demonstrating roll‐to‐roll fabrication, the potential for commercial production from this low‐cost and sustainable feedstock is substantiated.

In this work a multilayer barrier paperboard was produced in a roll-to-roll process by slot-die coating of nanocellulose (microfibrillated cellulose or carboxymethylated cellulose nanofibrils) followed by extrusion coating of biodegradable thermoplastics (polylactic acid, polybutylene adipate terephthalate and polybutylene succinate). Hyperplaty kaolin pigments were blended in different ratios into nanocellulose to tailor the barrier properties of the multilayer structure and to study their influence on adhesion to the thermoplastic top layer. Influence of a plasticizer (glycerol) on flexibility and barrier performance of the multilayer structure was also examined. Water vapor permeance for the multilayer paperboard was below that of control single-layer thermoplastic materials, and oxygen permeance of the coated structure was similar or lower than that of pure nanocellulose films. Glycerol as a plasticizer further lowered the oxygen permeance and kaolin addition improved the adhesion at the nanocellulose/thermoplastic interface. The results provide insight into the role played by nanocelluloses, thermoplastics, pigments, and plasticizers on the barrier properties when these elements are processed together into multilayer structures, and paves the way for industrial production of sustainable packaging.

Recent advances in perovskite solar cells (PSCs) have resulted in greater than 23% efficiency with superior advantages such as flexibility and solution‐processability, allowing PSCs to be fabricated by a high‐throughput and low‐cost roll‐to‐roll (R2R) process. The development of scalable deposition processes is crucial to realize R2R production of flexible PSCs. Gravure printing is a promising candidate with the benefit of direct printing of the desired layer with arbitrary shape and size by using the R2R process. Here, flexible PSCs are fabricated by gravure printing. Printing inks and processing parameters are optimized to obtain smooth and uniform films. SnO2 nanoparticles are uniformly printed by reducing surface tension. Perovskite layers are successfully formed by optimizing the printing parameters and subsequent antisolvent bathing. 2,2′,7,7′‐Tetrakis‐(N,N‐di‐4‐methoxyphenylamino)‐9,9′‐spirobifluorene is also successfully printed. The all‐gravure‐printed device exhibits 17.2% champion efficiency, with 15.5% maximum power point tracking efficiency for 1000 s. Gravure‐printed flexible PSCs based on a two‐step deposition of perovskite layer are also demonstrated. Furthermore, a R2R process based on the gravure printing is demonstrated. The champion efficiency of 9.7% is achieved for partly R2R‐processed PSCs based on a two‐step fabrication of the perovskite layer. Gravure printing for flexible perovskite solar cells is presented. A perovskite layer is successfully printed based on both one‐ and two‐step processes. The all‐printed flexible perovskite solar cells fabricated by sequential gravure printing of hole‐transporting, perovskite, and electron‐transporting layers exhibit 17.2% champion efficiency. Remarkably, partly roll‐to‐roll processed, flexible perovskite solar cells show 9.7% champion efficiency.

A review of methods for calculating the energy-power parameters of piercing a workpiece in screw rolling mills and a method for calculating the resistance to metal deformation that takes into account the deformation parameters in the deformation zone of piercing screw rolling mills are presented. Based on calculating results the energy-power parameters when piercing solid billets in mills with different roll shapes, recommendations were made on the use of an improved method for calculating the pressure and force of metal on the rolls when piercing solid billets into hollow sleeves in screw rolling mills with rolls of various types.

The back-up rolls of hot strip mills wear considerably under the conditions of high temperature and heavy load, which affects the roll service period and the stability of strip profile control. Serious uneven wear, short service periods, and spalling problems occurred on conventional back-up rolls of upstream stand CVC mills in 1500 mm continuous hot rolling production lines. Through finite element simulations, the problems are determined to be caused by the configuration of a flat roll contour of the back-up roll and the CVC roll contour of the work roll, which leads to uneven contact pressure between the rolls. The wear distribution form is ‘anti-CVC’ shape, and there is peak contact pressure between the rolls on both sides of the roll body. In particular, the long-term negative shifting of CVC on site further increases the peak contact pressure between the rolls, resulting in uneven wear and spalling accident. Based on the design technology of VCR back-up roll contours with variable contact lengths, and considering the cooperation between the middle of the back-up roll and the CVC work roll contour, the roll contour of the back-up roll has been improved. The designed VCRplus roll contour was analyzed and evaluated by finite element simulation, including the distribution of contact pressure between rolls, the control effect of bending force, and the transverse stiffness of the roll gap. The simulation results show that the VCRplus roll contour can effectively improve the uneven distribution of contact pressure between the rolls, and effectively improve the control effect of bending force and the transverse stiffness of the roll gap. Industrial tests demonstrate that VCRplus back-up roll contours have the advantages of uniform back-up roll wear, enhanced self-sustaining of the roll contour, and further extension of the back-up roll service life. The roll contour has now stably been put into industrial production, and the rolling capacity during the back-up roll service period has been extended from 150,000,000 kg to 250,000,000 kg.

The ginning process significantly impacts the quality of cotton lint. However, an accurate mathematical model to describe the relationship between ginning process parameters and cotton lint quality is still unavailable, which hinders the optimization of the ginning process. To improve the production efficiency of ginning machines, this study uses simulation experiments to analyze the force and deformation of seed cotton rolls within the ginning machine’s working chamber. By examining the maximum stress and maximum strain values of the seed cotton rolls during the simulation, the study evaluates the stability and processing efficiency of the ginning process. Experimental results indicate that when the ejector speed is 300 r/min and the adjustable chamber angle is 7°, the ginning process is stable and the machine operates efficiently.

The work rolls of CVC rolling mill usually adopt S-shaped roll profile curve in the rolling process of plate, which changes the contact between the rolls and causes the contact pressure distribution between the rolls to be uneven. The peak of the contact pressure between the rolls appears at the end of the roll, which leads to peeling or “meat loss” at the end of the roll and poor plate crown control effect. To solve those problems, a CVC rolling mill backup roll profile curve with parabolic chamfer was proposed, and the fusion model of plate crown based on mechanism and data-driven models was developed. Combining the parameters of the CVC roll profile curve, the theoretical calculation formula of the backup roll chamfering was deduced. According to the actual data of the plate rolling mill, the parameters of different types of backup roll chamfering were determined, and the distribution of contact pressure between the rolls under different backup roll chamfering was calculated and analyzed by finite element model. Based on the new parabolic chamfer curve of backup roll, the rolling force setting model based on Extreme Learning Machine (ELM) and roll wear model based on Genetic Algorithm Artificial Neural Network (GA-ANN) were constructed by using the nonlinear fitting ability of machine learning algorithm. Then, the predicted results of rolling force and roll wear were taken as the input variables of plate crown prediction. At the same time, the roll system deformation model and roll bending force model based on mechanism model were introduced as inputs to construct the plate crown Convolutional Neural Network (CNN) model based on mechanism and data-driven fusion. The simulation results show that the parabolic chamfer can significantly reduce the pressure between the backup rolls. When the rolled strip width is 2000 mm, 2400 mm, and 2800 mm, the parabolic chamfer can reduce the peak contact stress between the rolls by 8.6% and 10.8%. When the rolling bending force is 1600kN, 2100kN, and 2600kN, the parabolic chamfer can reduce the peak contact stress between the rolls by 8.6%, 8.9%, and 9.1%. The hit ratio of plate crown increased from 90.4% to 96.5%, and the product degradation rate caused by the shape problem decreased by 35.5%.

\"An epic play with music that examines the human costs of the quest for artistic greatness. The place: Sausalito. The time: the mid-1970s. The carpet: brown shag. Stereophonic brings us inside the cloistered world of a recording studio as a rock band on the brink of superstardom attempts to create their sophomore album. The ensuing pressures open up cracks in the band's once-easy camaraderie, and spats over issues like tempo and song length begin to reveal deeper problems in the band's foundation. Running on a diet of booze, sleep deprivation, and a giant bag of cocaine, interpersonal relationships are pushed to the breaking point as a process that was meant to last a few weeks becomes a neverending slog. With original songs by Arcade Fire's Will Butler, David Adjmi's play is an electrifying portrait of a band wracked with division and disillusionment that nevertheless might be on the verge of creating a masterpiece\"--.

[This corrects the article DOI: 10.1371/journal.pone.0193888.].

The effect of varying the number of layers of a semi-finished product, that is, its thickness, and the pressing force between the working rolls on the breakaway force of a multi-layer package of semi-finished products is experimentally investigated in the article. The dependence of the required breakaway force of the working rolls on the change in the number of layers of semi-finished products supplied for mechanical processing between the working rolls at different pressure forces was experimentally determined. The values of the required breakaway force for the working rolls at the established values of the pressing force of the working rolls for packages consisting of five, ten, and sixteen layers of semi-finished products were obtained.