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Three kinds of commercial ink-jet printing paper were taken as the research objects, which were represented by sample A, sample B and sample C respectively. Sample A and sample C were domestic products Abbott and Jiayi, and sample B was foreign product Gulou. The structure and composition of the three sample coatings were determined, and the surface properties of the three coatings were analyzed. This helps to understand the performance status of inkjet paper products on the market, and has guiding significance for the study of various factors affecting the performance of inkjet paper coatings. AFM and SEM were used to observe the surface morphology of the three samples. It was found that the coating pigment particles of sample A and sample B had good dispersion uniformity, and the coating pigment particles of sample C aggregated and the dispersion uniformity was poor. The results of cross-section SEM and EDS analysis show that only sample B coating has a double-layer structure, in which the bottom layer is aluminum-based pigment and silicon-based pigment, and the surface layer is only aluminum-based pigment. The coatings of sample A and sample C are single-layer aluminum-based materials. The properties of the coating surface of the three samples were analyzed. The results showed that the basic properties of the three samples met the product quality standards. Among them, the coating of sample B had the highest gloss (74.30%), hardness (3H) and water resistance. In terms of ink absorption, the ink absorption of sample B coating (64.7%) was higher than that of sample C (57.9%), slightly lower than that of sample A (69.2%). Sample B had the best comprehensive performance among the three samples. Finally, a double-layer coating process scheme for improving the performance of inkjet printing paper is proposed, which provides a direction for improving the performance of inkjet printing paper and has practical significance for the research of advanced inkjet printing paper. [ABSTRACT FROM AUTHOR]

Utilizing the iron-carbon microelectrolysis technology to carry out in-depth treatment of waste paper and pulp wastewater, the optimal process parameters were determined based on single factor experiments. In addition, the response surface methodology was employed to optimize the process parameters by analyzing the experimental results. Under the optimized conditions, the excita1tion-emission-matrix spectra and GC-MS were used to analyze the water quality of the treated wastewater. The results showed that the optimal treatment conditions of iron-carbon microelectroly1sis process were initial pH=3.0, filler addition amount 255g L-1, reaction time 120 min, aeration amount 0.9 L min-1, and the COD removal efficiency was 32. 14% under these conditions; the maximum predicted value of COD removal rate calculated under the optimal process conditions was 34.57% from the response surface analysis, which was basically consistent with the experimental results. The results of excitation-emission-matrix spectra analysis showed that the iron-carbon micro1electrolysis process was effective in degrading humic acid and fulvic acid in waste paper and paper wastewater, and GC-MS analysis showed that the relative content of eicosanoids in wastewater was reduced from 43.31% to 4.79% of the original water after the iron-carbon microelectrolysis treat1ment, but a small amount of new pollutants were generated at the same time. [ABSTRACT FROM AUTHOR]

With the rapid development of flexible electronics industry, the conventional PET, PEN and other plastic substrates are unable to satiate the requirement due to higher cost and low light extraction efficiency. Paper has broad prospects as a flexible substrate due to its wide access, low-cost and thinness. In this paper, we integrated epoxy resin into sulfuric acid paper to fabricate a new type of substrate: plastic-paper. The plastic-paper has excellent optical properties, mechanical properties as well as water and chemical stability, as found through testing. Results show that the surface flatness and wettability of the paper are improved by the application of epoxy resin coating. The plastic-paper has a high optical transmittance up to 88.25%, reaching the same level with PET substrate. And the plastic-paper also has a high transmittance haze of 62.9%, which is far higher than PET substrate. The plastic-paper has a tensile strength up to 108.4 MPa, along with excellent water and chemical stability. Successful fabrication the organic light-emitting device on the plastic-paper surface and emitted uniform light based on the principle of light-emitting electrochemical cell (LEC), under atmospheric condition. The best device performance with a maximum luminance of 396. 2 cd m-2, a maximum current efficiency of 0.64 cd A-1, which is 2.9 times higher than that of PET substrates, providing more excellent optoelectronic properties. The developed plastic-paper with high optical transmittance and high optical haze holds a great potential in flexible optoelectronic devices. [ABSTRACT FROM AUTHOR]

The content of 7 metal elements in 49 kinds of cigarettes composed of 5 kinds of tobacco and 10 kinds of cigarette paper was determined by flame atomic absorption method, the effects of the combination of tobacco and cigarette paper on cigarette tar content were analyzed from four aspects: composition of tobacco, conventional chemical composition, metal element content and parameters of cigarette paper. By constructing a cigarette sample system with co-variation of cigarette tobacco and cigarette paper, the joint effect and relative importance of the two on the tar content were studied. The results show that: The combination of tobacco and cigarette paper was an important factor affecting the tar content, which together explained 81.9% of the variation of tar content, and the effect of tobacco was greater than that of cigarette paper, which explained 48.6% of the variation of tar content. The sodium content in the cut tobacco was positively correlated with the tar content, while the magnesium, manganese and potassium were negatively correlated with the tar content. The influence of cigarette paper parameters on the amount of tar content is interactive, but the trend and degree of its influence are affected by the parameters in the tobacco. In the covariant system of tobacco and cigarette paper, tobacco is the main factor affecting the amount of tar content, and cigarette paper is the secondary factor. [ABSTRACT FROM AUTHOR]

Traditional paper dyes are easy to fade under photothermal conditions, in contrast. waterborne organic pigments have excellent tinctorial strength and high light and weather resistance, which can meet the requirements of highend paper yarn to coloring efficacy and light fastness of the colorants. However, the lack of chemical and hydrogen bonds between organic pigment particles and plant fibers, and the pigments are difficult to fix in the structure of the paper. In this study, cellulose nanofibers (CNF/TOCNF) were used as the primary skeleton network and carboxymethyl cellulose (CMC) macromolecules were used as the secondorder reinforcement network, together construct a multilevel gradient network to enclose and fix organic pigment particles. The dispersion and fixation of the pigment particles are realized by double coating. The results show that the coloring efficacy and colorfastness of the paper yarn base paper can be improved significantly by using the gradient network to fix the pigment particles, and has a positive effect on improving the strength and roughness of the paper. This study has an important role in solving the problem of coloring technology in the production of high-end paper yarn. [ABSTRACT FROM AUTHOR]

A total of 479 government procurement contract announcement and 402 original contract texts for paper resources were collected and sorted from the "Government Procurement Contract Announcement System" of the China government procurement network in Double First-Class university libraries. Through statistical and textual analysis, this paper provides a comprehensive analysis of government procurement contracts for paper resources in double-class university libraries. It examines the overall situation and key terms of these contracts, identifies existing problems, and incorporates the latest laws, regulations, and business practices. It presents several optimization suggestions for the standardized management of government procurement contracts for paper resources in university libraries in China. These suggestions include: standardizing the process of signing and announcing contract information, avoiding the indiscriminate application of contract model text, strengthening the compliance review of contract amount/ price terms, refining product quality service standards and breach of contract liability terms, clearly stipulating settlement and payment terms, and refining the performance acceptance terms. These suggestions aim to provide a useful reference for improving the management of government procurement contracts in university libraries. [ABSTRACT FROM AUTHOR]

The microcrystalline cellulose/thermoplastic starch (MCC/TPS) film was prepared by melt extrusion method, and the MCC/TPS film was combined with paper by hot pressing method. The results show that the SEM images show that the interface layer of paper-plastic composite has good adhesion. When the addition a-mount of MCC is 5wt%, the mechanical properties of TPS film are improved, and the path of water vapor through TPS film is extended, resulting in the water vapor transmittability of MCC/TPS/paper composite is reduced, and the barrier properties of paper-plastic composite are improved. TPS/paper composites and MCC/ TPS/paper composites have better physical properties (i.e. smoothness, flexibility and folding resistance) than paper alone. Therefore, the addition of MCC can improve the barrier properties and mechanical properties of paper-plastic composite materials to meet the requirements of the food packaging industry for low water sensitive materials. [ABSTRACT FROM AUTHOR]

Considering the uncertainty of market demand, the uncertainty of the number of returned products and the risk of facility interruption, the carbon quota policy and the construction of new energy facilities are taken as the key factors affecting the decision-making. A dual-objective robust optimization model with minimum total cost and carbon emissions of supply chain network is established, and a Prim-NSGA II algorithm is designed to solve the model. The effectiveness of the algorithm is verified by comparing with the IGD and SM indexes of the traditional NSGA II algorithm. The optimal network planning scheme under different uncertainties and the management countermeasures under different parameters are obtained. The results show that the algorithm achieves the purpose of accelerating the convergence speed and maintaining the diversity of the population. It is verified that the robust optimization model can realize the comprehensive improvement of the robustness, economic and environmental benefits of the closed-loop supply chain network, and provide decision-making basis for decision makers to formulate specific carbon emission reduction schemes. [ABSTRACT FROM AUTHOR]

Traditional federated learning faces challenges such as high communication costs, structural heterogeneity,and insufficient privacy protection. To address these issues, this paper proposes a federated learning evolutionary algorithm that applies sparse evolutionary training algorithm to reduce communication costs and integrates local differential privacy protection for participants’ privacy. Additionally, it utilizes the NSGA-Ⅲ algorithm to optimize the network structure and sparsity of the global federated learning model, adjusting the relationship between data availability and privacy protection. This achieves a balance between the effectiveness, communication costs, and privacy of the global federated learning model. Experimental results under unstable communication environments demonstrate that, on the MNIST and CIFAR-10 datasets, compared to the solution with the lowest error rate using the FNSGA-Ⅲ algorithm, the proposed algorithm improves communication efficiency by 57. 19% and 52. 17%, respectively. The participants also achieved（3. 46, 10-4） and（6. 52, 10-4）-local differential privacy. This algorithm can effectively reduce communication costs and protect participant privacy without significantly compromising the accuracy of the global model. [ABSTRACT FROM AUTHOR]

In order to consider the influence of thermal radiation and winding insulation paper on the temperature field of transformer natural convection in practice, a physical calculation model of transformer hot-spot and temperature-rise including gasket, insulation paper cylinder, pressing plate, winding insulation paper and black body thermal radiation was established based on an oil immersed transformer SSZ20- 63000/ 110. The influence of thermal radiation and winding insulation paper on the temperature field of transformer natural convection was studied through a finite element method. The results show that in the case of natural convection, thermal radiation will make the winding temperature of hot-spot and temperature-rise slightly, while the winding surface insulating paper will make the winding temperature of hot-spot and temperature-rise significantly. The thermal radiation will not affect the distribution of hot-spot, while the winding insulation paper will make the distribution of hot-spot move down. Although the thermal radiation has little effect on the temperature of hot-spot of the winding, it has a greater effect when considered together with the winding insulating paper. It can be seen that the thermal radiation and winding insulation layer should not be ignored in the simulation calculation, otherwise the difference with the actual value is too large. [ABSTRACT FROM AUTHOR]