Due to different sources and the water using habits, the wastewater of papermaking fluctuates sharply over time. Quality control of the effluent in the papermaking wastewater treatment process (PWTP) is rather challenging and costly. Concerns are growing about the effects, especially of the greenhouse gas (GHG) emission, of PWTP on the environments. In order to realize the economic, energy-efficient, and eco-friendly objectives, with subject to the effluent quality, this paper proposed a multi-agent deep reinforcement learning framework to simultaneously optimize process cost, energy consumption, and GHG emission in the PWTP. Benchmark simulation model No.1 (BSM1) was used to simulate biological treatment process of papermaking wastewater. The default wastewater influence data of BSM manual was used to train, and the real data collected from papermaking industry was applied to verified the model system. The results demonstrate that the proposed system effectively identifies optimal control strategies for multiple targets, outperforming traditional methods.
使用内乳化法分别制备聚乳酸基水性聚氨酯(PLA-WPU)与聚己内酯基水性聚氨酯(PCL-WPU),然后将PCL-WPU与PLA-WPU进行物理共混,制备生物基可降解水性聚氨酯(PLA-WPU-PCLX).结果表明,当PCL-WPU含量30％时,制备的PLA-WPU-PCL30综合性能较好,结晶性能较纯PLA-WPU与PCL-WPU有明显提升,拉伸强度达22.2 MPa,断裂伸长率为540％,初始热分解温度为290.5℃,堆肥降解14天后质量损失率为2.4％.对纸张表面进行施胶,施胶后的纸张接触角由99°提升至112°;与淀粉施胶相比,PLA-WPU-PCL30质量分数5％时,纸张施胶度由16s增加至71 s,Cobb值由68.4g/m2降低至44.7 g/m2,抗张强度由4.6 kN/m提升至5.4 kN/m,撕裂指数由1.32 mN·m2/g提升至1.42mN·m2/g,耐破度由235 kPa提升至273 kPa,耐折度由55次提升至146次.
随着大众审美理念的升级,传统的实用性纸包装设计已难以满足消费者多元化的审美需求,设计者开始寻求一些个性化的美学元素并将其融入纸包装设计中,以拉近与消费者的情感距离,提升包装的美感.水彩作为一种清新自然的美术元素,可以被应用于纸包装设计,增强包装的纹理艺术与意境美感,带给人清新温情的感觉,可以有效提升纸包装的市场竞争力.
随着国民消费水平的不断提升,广大消费者的饮食消费品位越来越高了,其对餐饮产品的外观也提出了较高的要求.在这种"以貌取物"的背景下,纸杯作为饮品领域的代表性消费品,其设计要求逐步迎合消费者,不仅要具备实用性,而且在视觉传达方面要具有一定艺术性,以吸引消费者.
Through the analysis of the two factors including"direction change effect"and"polygon effect",the fluctuation range of the slat conveyor's instantaneous velocity was predicted,and further verified by the actual measured data.By analying the effects of instantaneous velocity fluctuation of slat conveyor on paper rolls,the conclusion was drawn that the instantaneous velocity fluctuation rate exceeded 30％,and paper damage could not be completely eliminated.
