摘要：Molecular nitrogen is relatively inert and the activation of its triple bond is full of challenges and of ***,searching for an efficiently heterogeneous catalyst with high stability and dispersion is one of the important targets of chemical ***,we report a Ba‐K/Ru‐MC catalyst with Ru particle size of 1.5–2.5 nm semi‐embedded in a mesoporous C matrix and with dual promoters of Ba and K that exhibits a higher activity than the supported Ba‐Ru‐K/MC catalyst,although both have similar metal particle sizes for ammonia ***,the Ba‐K/Ru‐MC catalyst is more active than commercial fused Fe catalysts and supported Ru *** techniques such as high‐resolution transmission electron microscopy,N2 physisorption,CO chemisorption,and temperature‐programmed reduction suggest that the Ru nanoparticles have strong interactions with the C matrix in Ba‐K/Ru‐MC,which may facilitate electron transport better than supported nanoparticles.

摘要：The conversion of biomass-derived products to fine chemicals and fuels is extremely important for the utilization of renewable energy *** is not only a by-product formed during the hydrogenation of biomass-derived oxygenated chemicals,but also an inexpensive and nontoxic *** instability of solid catalysts for aqueous-phase reactions caused by metal leaching and the collapse of a catalyst support represents a significant *** this work,various catalyst stabilization strategies including the nanospace and interfacial confinements that prevent sintering and leaching of metal nanoparticles as well as modification methods for increasing the support stability are summarized and systemically *** addition,feasible approaches to designing stable and efficient heterogeneous catalysts for aqueous-phase reactions are proposed.

摘要：The development of efficient and stable non-mercury catalysts for the chlor-alkali industry is desirable but remains a great ***,we design a series of ruthenium catalysts for acetylene hydrochlorination by regulating the electronic structure of ruthenium ions through coordination with various ligands(thiourea,phenanthroline,and L-lactic).The turnover frequencies(TOFs)and apparent activation energies for the acetylene hydrochlorination have a linear relationship with the binding energy of Ru3+in the ruthenium *** synergetic effect of the ruthenium ion and ligands plays an important role in acetylene *** Ru-Thi/AC catalyst with thiou­rea as the ligand shows the highest TOF and stability in acetylene *** present study provides a rational method to regulate the electronic structure of supported metal catalysts with high catalytic performance exhibited by the carbon-supported heterogeneous catalysts.

摘要：生物质转化为平台分子,进一步转化成燃料和化学品是生物质利用的重要途径之一。本文总结了水相加氢反应及其催化剂的研究进展,指出了水相催化反应对催化剂的调控合成带来的挑战,如活性组分的流失,催化剂表面重构及毒化等。总结了水相催化加氢反应中高活性及高稳定性加氢催化剂的合成策略:如载体表面结构调控、炭的表面包覆、载体与金属活性组分之间相互作用的增强及新结构催化剂的设计合成等,指出了水相加氢反应的催化剂设计合成的发展方向,为生物质催化转化研究提供参考。

摘要：利用盆栽实验,研究了土壤柴油污染、镉污染和柴油+镉复合污染对土壤酶活性和微生物数量的影响.实验土壤为上海郊区无污染水稻土,通过不同的处理,共设计了对照(CK)、低量柴油(CYL)、高量柴油(CYH)、低量镉(CdL)、高量镉(CdH)、高量柴油+高量镉(CYH+CdH)和高量柴油+高量镉+苗(CYH+CdH+P)7个处理组.结果表明:CYH和CYH+CdH处理增加了土壤脲酶(urease,UR)的活性,最高可达CK组的5.25和2.63倍,且土壤微生物数量也有相应增加;CYH、CYL和CYH+CdH处理对脱氢酶(dehydrogenase,DE)活性有显著抑制作用;镉的单污染对脱氢酶活性的影响较小,CdL处理甚至有激活效应.

摘要：为了减少汞触媒的流失和污染,解决触媒倒台问题,设计了2种不同型号的超稳低汞触媒ZH-1F和ZH-1B,并分别装填前台转化器和后台转化器。对运行过程中的技术参数及汞流向进行了监测和衡算。根据运行结果,新型超稳低汞触媒在前台、后台转化器乙炔空速为60~80 h^(-1)及反应温度为160~180℃的高温高负荷运行条件下,均可连续运行8500 h以上。转化器出口气体中的汞含量低于国标汞排放标准。前台转化器氯乙烯单体生产能力达1.8万t,触媒单耗(以生产1 t PVC计)可低至0.4 kg以下。使用超稳低汞触媒并采用新的装填方案,基本可以解决汞触媒使用过程中的汞流失问题,实现99%以上的汞回收。

摘要：为了快速恢复大规模受灾用户的应急通信服务,针对接入用户数量众多导致的业务差异性和动态性显著、集中式算法难以扩展等问题,提出了一种基于多智能体强化学习的分布式智简覆盖优化架构。在网络特征层中,设计了考虑用户业务差异性的分布式k-sums分簇算法,每个无人机基站从用户需求出发,原生简约地调整局部网络结构,并筛选簇中心用户特征作为多智能体强化学习神经网络的输入状态。在轨迹调控层中,设计了多智能体最大熵强化学习(MASAC)算法,无人机基站作为智能节点以“分布式训练−分布式执行”的框架调控自身飞行轨迹,并融合集成学习和课程学习技术提升了训练稳定性和收敛速度。仿真结果表明,所提分布式k-sums分簇算法在平均负载效率和分簇均衡性方面优于k-means算法,基于MASAC的无人机基站轨迹调控算法能够有效减小通信中断的发生频率、提升网络的频谱效率,效果优于现有的强化学习方法。

摘要：针对目前生成动画图像质量较低、内容失真、视觉效果有待进一步提升等问题,本文在Generative Adversarial Networks for Photo Cartoonization(CartoonGAN)网络的基础上提出了一种动漫风格迁移的网络模型。首先通过引入预训练模型ResNet-101对内容损失函数进行训练,加快训练速度的同时保证真实图片内容的完整性;然后在生成器模块加入激励挤压模块(SE-Block),实现在特征提取中保留空间特征和通道特征,使得生成的图片更易被判别器区分,从而更好地训练判别器。最后,进行了定性比较和定量分析,结果表明本文所提算法能够有效提升训练速度、提高漫画图像生成质量和增强图像的抽象感,且IS、FID的得分分别为11.2和86。

摘要：对浮式风电制氢装置工程化进行了研究,并基于8~10 MW的浮式风电平台,设计了3 MW独立式风电制氢装置,制定了利用风机发电提供的能源,提取海水进行纯化和电解水制氢的技术路线,提出了关键设备的技术要求,并进行了系统的布置及初步的安全性和经济性分析。结果表明,由于经济性差,海工应用还不成熟,目前海上浮式制氢的工程化还需要一个过程,进行工程试验是大规模工程化的前提。

摘要：针对《化工原理》、《化工原理实验》、《化工原理课程设计》等课程群特点,结合《化工制图》课程以及Aspen Plus流程模拟软件的特点,基于OBE的教学理念和新工科的背景出发,提出了《化工原理》课程群的交叉教学模式。通过课程交叉教学模式探索,提高学生的课程综合应用能力,增进学生的学习兴趣和实践能力,为培养应用型创新人才提供新的教学思路。