基于CiteSpace的资源型产业研究知识图谱分析

资源型产业发展为推进国家经济增长和工业化进程提供了重要保障。为深入了解资源型产业的研究情况，以CNKI数据库为数据源，搜集2000—2020年关于资源型产业的核心及以上期刊论文，利用CiteSpace软件从发文作者与研究机构分布、关键词共现网络和时区图谱等方面，绘制知识图谱，进行可视化分析。研究发现：资源型产业领域的研究成果愈加丰富，但研究群体间联系合作较少，且现有的合作研究主要集中在所处地域资源富集和具有学科优势的研究机构及学者；资源型产业领域的研究热点可概括为产业发展、资源型城市、产业集群、产业结构、产业链和产业集聚等方面；针对资源型产业领域未来可从资源型产业相关理论研究、创新发展模式和可持续发展等方面深入展开。     

综合传动装置胀圈密封轴槽间隙设计方法

研究一种基于理论计算与CFD仿真的胀圈密封环轴槽间隙尺寸设计方法。基于流体力学的基本方程,建立胀圈密封流场的数学模型;结合实际工况与使用要求,确定胀圈密封环与轴槽径向间隙、轴向间隙及配流衬套与旋转轴之间的间隙尺寸的约束范围;建立流场的计算流体力学模型,通过正交试验设计,分析影响胀圈密封性能的高灵敏度因素;以密封泄漏量最小为目标函数,选取最佳的轴槽间隙设计参数。结果表明,研究的3种间隙中,相比于胀圈密封环与轴槽的径向间隙、轴向间隙,配流衬套与旋转轴之间的间隙对密封环的泄漏量影响更为显著,当配流衬套与旋转轴之间的间隙增大,泄漏量也随之增大。     

Fracture Mode of Martensite-Austenite Constituents Containing Multiphase Steel Controlled by Microstructural and Micromechanical Aspects

The fracture mode in different M-A constituents containing multiphase steels under impact load was examined considering their microstructural and micromechanical aspects. The results showed that a ductile fracture develops in the fine-grained bainitic ferrite/M-A multiphase by microvoids initiation and coalescence, while cleavage develops in the coarse-grained polygonal ferrite/M-A multiphase by microcracks initiation and propagation, due to their diversities in morphologies of microstructural components and microhardness difference between phases.     

The development of semiconductor-ionic conductor composite electrolytes for fuel cells with symmetrical electrodes

Lowering the operational temperature of solid oxide fuel cells (SOFCs) is a vital research challenge for achieving broad commercialization of SOFCs. However, there is currently a lack of suitable electrolyte materials with sufficient ionic conductivity. In this review, the recent progress in semiconductor-ionic conductor composite strategies and related key technologies for low temperature SOFCs (LT-SOFCs) applications is highlighted, in particular, emphasizing the demonstration of such composite materials sandwiched between semiconductor electrodes in a symmetrical configuration that has delivered a potent solution. Despite the co-existence of electronic and ionic conduction in the composite membrane, no electronic short-circuiting was displayed, but rather an enhanced device power output was achieved. Here, the recent progresses in the development of SOFCs, from single-layer fuel cells, to two-phase semiconductor-ionic conductor membrane fuel cells with symmetrical electrodes, are discussed. This review will furnish researchers within the SOFC community and beyond with a broader understanding of the theory, development and significance of composite materials for LT-SOFCs.     

自动矿物学：Ⅰ. 技术进展与应用

近年来，“自动矿物学”（或“定量矿物学”）的概念和相关技术得到了显著的发展和广泛的应用，使矿物学研究，尤其是工艺矿物学研究从人工测试走向自动化测试、从定性研究走向定量研究。本文评述了自动矿物学的技术进展与应用，主要包括：①矿物分析技术发展阶段；②自动矿物学技术国际研究进展与国内研究现状；③自动矿物学的应用领域及发展趋势。在此基础上，总结了基于扫描电镜的自动矿物学技术的基本原理以及选矿产品环氧树脂抛光片制备过程中需要注意的一些问题。以期为固体地球科学研究和矿产资源开发利用过程中遇到的一些瓶颈问题提供新的研究途径和新的思路。     

带斜孔的U形支座注塑模具设计

根据某品牌汽车U形支座结构特点设计了模具的浇注系统、成型零件、推出机构以及斜孔抽芯机构等关键部件。其中采用热流道系统与普通流道系统相结合的复合结构,解决塑料材料流动性差的工艺问题;采用二级滑块抽芯机构解决斜孔成型与抽芯的结构难题。生产实践表明:该模具结构紧凑,动作可靠。     

Contention-aware prediction for performance impact of task co-running in multicore computers

Wireless Networks - In this paper, we investigate the influential factors that impact on the performance when the tasks are co-running on a multicore computers. Further, we propose the machine...     

Inhibitory effects of curcumin and piperine on fluorescent advanced glycation end products formation in a bovine serum albumin–fructose model

This study investigated the inhibitory effects of curcumin and piperine on fluorescent advanced glycation end products (fAGEs) formation in a bovine serum albumin (BSA)–fructose model. Model systems of BSA and fructose were prepared, and curcumin or piperine was added. fAGEs and BSA oxidation product (dityrosine, kynurenine and N'-formylkynurenine) contents were determined. The results showed that fAGEs content decreased with increasing concentration of curcumin and piperine (P < 0.05). Addition of curcumin and piperine at 160 µg mL⁻¹ could inhibit fluorescent AGEs by 100% and 93% respectively. Dityrosine and N'-formylkynurenine contents decreased as curcumin and piperine concentration increased (P < 0.05). Furthermore, the result of principal component analysis indicated that curcumin and piperine markedly impeded BSA oxidation, resulting in a lower level of fAGEs in model systems. Therefore, adding curcumin and piperine may facilitate reduced fAGEs levels in BSA–fructose model.     

某铜硫矿选矿工艺研究

对某铜硫矿进行了详细的浮选工艺研究,对浮选尾矿中的磁铁矿进行了磁选回收,确定了最佳的工艺流程。闭路试验获得了铜品位24.16%、铜回收率92.04%的铜精矿和硫品位40.24%、硫回收率89.72%的硫精矿,以及铁品位65.15%、对原矿全铁回收率35.66%(对原矿磁铁矿回收率约93%)的铁精矿。     

工程公司的信息化建设

对国内工程公司信息化现状进行了分析，阐述了工程公司进行信息化建设的必要性，确立了信息化建设应该遵循的基本原则，并给出了工程公司信息化建设的实施的步骤。