铋精矿加压氧化氨浸高效分离铜、硫和铋

针对湖南柿竹园铋精矿火法冶炼过程中存在的成本高、低浓度SO₂和散烟排放污染环境、有价金属综合回收率低等问题, 以柿竹园铋精矿为原料, 提出了加压氧化氨浸分离铋与铜、硫的新工艺, 研究了氨水加入量、浸出温度、浸出时间、浸出压力及浸出液固比等因素对铜、硫、铋浸出率的影响。在氨水用量1.8 mL/g_铋精矿、液固比4∶1、釜压2.8 MPa、浸出温度160 ℃、浸出时间5 h、搅拌速度600 r/min的优化工艺条件下, 铜、硫浸出率分别达93.57%和92.87%, 铋不浸出并以氧化铋形态全部入渣, 实现了铜、硫与铋的高效分离。     

碳酸盐岩裂缝性储层常规测井评价方法

哈萨克斯坦K油田石炭系KT-Ⅱ段储层为开阔台地相中低孔、特低渗灰岩储层，裂缝对改善储层的渗流能力至关重要，前人研究的利用常规测井资料评价碳酸盐岩储层裂缝的方法由于受裂缝产状、饱和度、泥浆侵入深浅等多方面因素的影响，存在确定性差、容易误判的缺陷。基于研究区目的层段有限的取心和电成像测井资料，结合孔隙型储层和裂缝-孔隙型储层测井响应特征，提出了利用补偿中子确定基块岩石电阻率与基块声波时差，再比较二者与深侧向电阻率、声波时差的差异特征，进而综合识别储层不同产状裂缝发育段，最后建立了裂缝孔隙度、次生孔隙度、裂缝渗透率、总渗透率等储层参数的测井解释模型，实现了利用常规测井资料对碳酸盐岩油藏储层的裂缝识别及参数定量评价。该方法应用的测井综合评价成果与取心物性分析、生产动态情况能够更好地匹配，为该类油藏的合理高效开发提供了依据。     

Ethics,society, and technology: A Confucian role ethics perspective

This essay provides a very brief overview of Confucian ethics that focuses on the role-based morality. It compares Confucian ethics with two dominant schools of thought in Western ethics deontology and consequentialism. This essay then discusses how Confucian ethics provides a unique way to think about social and political issues such as how the political leaders are selected and evaluated, the ethical justification of political legitimacy, the prioritization of economic, social, and cultural rights over other rights, and moral egalitarianism. Finally, this essay explores the ways in which Confucian ethics serves as a useful intellectual resource for examining the issues arising from the ethical assessment of (emerging) technologies and the professional formation of engineers. The Appendix of this essay includes some teaching resources that instructors can employ to teach students about ethics, society, and technology from a Confucian role ethics perspective.     

信息技术在医院病案统计中的应用

伴随着我国综合实力的不断提升,信息技术获得了突飞猛进的发展,如今,医疗改革如火如荼地进行,医院的信息管理工作同以往相比较也实现了极大的发展。病案统计工作是指相关工作人员对医院中患者的信息进行全面统计,若是这项工作完成得足够出色,会给医院后续的信息查询工作带来诸多方便和快捷,也能够在某种程度上使医院管理效率和质量实现一定幅度的提升。因此,将信息技术和医院的病案工管理工作进行密切结合,就成为病案管理人员应当重点思考的问题。病案统计工作是医院管理工作中的一个重点环节,病案统计结果能够为医院整体绩效带来十分深远的影响。因此,投入更多时间和精力来提高对这项工作的重视,显得十分关键和重要。文章对信息技术在医院病案统计中的应用展开了分析。     

基于LoRa物联网技术的智能照明控制方案在高速公路上的应用——以北京新机场高速公路(南五环-北京新机场)为例

文章结合北京新机场高速公路照明工程实例,阐述了常规照明控制系统的现状,分析了基于新兴的LoRa物联网技术智能照明控制方案的系统原理和系统构成、系统在高速公路智能照明控制领域的应用以及系统应用能达到的节能和管理效益的提升效果,并对系统的扩展应用前景做了研究分析。     

Laplacian regularized robust principal component analysis for process monitoring

Principal component analysis (PCA) is one of the most widely used techniques for process monitoring. However, it is highly sensitive to sparse errors because of the assumption that data only contains an underlying low-rank structure. To improve classical PCA in this regard, a novel Laplacian regularized robust principal component analysis (LRPCA) framework is proposed, where the “robust” comes from the introduction of a sparse term. By taking advantage of the hypergraph Laplacian, LRPCA not only can represent the global low-dimensional structures, but also capture the intrinsic non-linear geometric information. An efficient alternating direction method of multipliers is designed with convergence guarantee. The resulting subproblems either have closed-form solutions or can be solved by fast solvers. Numerical experiments, including a simulation example and the Tennessee Eastman process, are conducted to illustrate the improved process monitoring performance of the proposed LRPCA.     

勃艮第宫廷的服装政治学——以彩绘手稿《让·沃奎林向菲利普三世献书》为例

以《让·沃奎林向菲利普三世献书》为例，分析15世纪勃艮第公爵菲利普三世统治时期，绘画中的服装对图中人物形象的塑造，以及由此形成的勃艮第宫廷独特的服饰文化特征和宫廷文化特点。《让·沃奎林向菲利普三世献书》不但较为全面地反映出15世纪上半叶勃艮第宫廷的服饰时尚，而且兼具复杂的叙事性。采用历史学和比较学的研究方法，将图像中的服装与社会生活、染织技术、宫廷文化等关联起来，剖析服装与历史生活密切相连的复杂结构。以菲利普三世为代表的勃艮第贵族强烈的个人服饰特征，结合骑士精神和壮丽恢宏的宫廷氛围，形成了勃艮第宫廷独特的宫廷文化，塑造了欧洲顶级宫廷的贵族形象。     

Slag eye formation in single and dual bottom purged industrial steelmaking ladles

ABSTRACT

Argon gas is often injected from the bottom of the ladle during steel refining operations. The injected gas interacts with the liquid (metal and slag) bath and enhances the momentum, heat, and mass transfer rate in the melt. However, during these gas–liquid interactions, an opening of the slag layer called slag eye is formed, which exposes the molten metal surface to the atmosphere, which is generally undesirable. In the current work, a transient, three-dimensional mathematical model is used to study the turbulent gas–liquid interactions in single as well as dual bottom blown industrial steelmaking ladles. A Coupled Level Set Volume of Fluid (CLSVOF) model is used for tracking the steel-argon, steel-slag, and argon-slag interfaces, from which the slag-eye area has been predicted. It is found that the inlet gas purging rate, melt height, slag layer thickness, angular and radial positions of the gas inlets affect the slag opening area. Non-dimensional empirical correlations are proposed to predict the slag opening area in both single as well as dual purged ladles, using non-linear regression analysis.     

地下输水隧洞围岩稳定监测系统设计研究

在地下隧洞施工输水整个环节中,施工环境复杂多变。由于地质岩体结构应力、地下水以及岩体力学构造等各方面的不确定、不稳定因素的影响极大,如果仅依靠传统经验来进行管理,已经不符合现代化管理的最基本要求,也无法达到标准化管理。文章首先阐述了地下输水隧洞围岩稳定监测系统设计的目的,然后对设计输水隧洞围岩稳定监测系统进行了分析,以便及时正确掌控地下输水的隧洞围岩发展状态,保证隧洞施工的顺利完成。