Tactical production and distribution planning with dependency issues on the production process

Tactical production-distribution planning models have attracted a great deal of attention in the past decades. In these models, production and distribution decisions are considered simultaneously such that the combined plans are more advantageous than the plans resolved in a hierarchical planning process. We consider a two-stage production process, where in the first stage raw materials are transformed into continuous resources that feed the discrete production of end products in the second stage. Moreover, the setup times and costs of resources depend on the sequence in which they are processed in the first stage. The minimum scheduling unit is the product family which consists of products sharing common resources and manufacturing processes. Based on different mathematical modelling approaches to the production in the first stage, we develop a sequence-oriented formulation and a product-oriented formulation, and propose decomposition-based heuristics to solve this problem efficiently. By considering these dependencies arising in practical production processes, our model can be applied to various industrial cases, such as the beverage industry or the steel industry. Computation tests on instances from an industrial application are provided at the end of the paper.     

人类学视角中的荣昌陶艺——关于荣昌陶艺的田野调查

荣昌陶器技艺是中国传统陶器技艺的重要组织部分，因其历史悠久、工艺精湛而久负盛名，与江苏宜兴陶、云南建水陶、广西钦州陶并称为中国四大名陶，荣昌又与广东佛山、江苏宜兴一起被誉为中国“三大陶都”。在千百年的传承和发展过程中，荣昌陶器为巴蜀地区人民的生产和生活曾做出过重要贡献。在非物质文化遗产保护热兴起的今天，重新梳理荣昌陶器技艺产生和发展的场境，发掘潜藏在陶器技艺背后的经济和文化动因，能够使我们在文化生态和生产条件发生巨大变化的今天更好地保护、传承和发展荣昌陶艺。     

我国盐业产业组织政策研究

产业组织政策的基本目标就是要促进产业实现有效竞争,我国盐业产业组织政策并没达到有效竞争的目标,长期处于"二元"产业组织结构。一方面"大工业盐"市场集中度较低,竞争过度,另一方面"食小盐"市场部门垄断严重,竞争缺失,导致产业组织效率低下。因此,当务之急,不仅要实行管制与竞争相兼容的盐业特许投标政策,还要出台规模经济与竞争活力相兼容的系列有效竞争政策——企业并购政策、经济规模政策和竞争活力政策,以促成金字塔形的产业组织体系,彰显各层次企业的规模经济,实现有效竞争,提高产业经济效率,进而提升我国盐业产业的国际竞争力。     

民族文化元素在偶动画艺术创作中的应用

本文探讨了偶动画艺术创作与民族文化之间的关系,阐述了民族文化元素在偶动画创作中的具体应用方式。从题材、内容、风格等多个方面着手,探究如何以创新的思维方式与偶动画表现形式相结合,创造出更多具有影响力的国际性偶动画作品。     

马克思视域内的社会形态理论研究

本文从社会形态理论的前提出发,以马克思社会形态理论的视域为主线,研究了马克思视域内的社会形态理论,即生产力视域内的社会形态理论、生产方式视域内的社会形态理论和人的发展视域内的社会形态理论以及三者之间的递进关系。生产方式视域以生产力视域为基础,但又不限于生产力视域,人的发展视域以生产方式视域为基础,但又不限于生产方式视域,从而得出马克思视域内的社会形态的概念。一方面,中国社会主义社会形态建立、建设和改革开放的实践,为我们准确全面地认识马克思视域内的社会形态理论创造了条件;另一方面,新世纪、新实践和新任务要求中国人重新准确地全面地把握马克思视域内的社会形态理论。     

Curation: a theoretical treatment

Curation is a key mechanism of sociality in a digital era. With an abundance of information, sifting, sorting, selecting, hiding, and standing out become laborious tasks. While researchers have diligently documented people’s curatorial strategies, digital curation remains undertheorized in its own right. I therefore theorize digital curation by disentangling productive curation from consumptive curation, addressing how people curate content that they share, and that which they consume. I embed these agentic curatorial practices within structural bounds, both social and technological. In doing so, I offer a basic theoretical model that captures a dynamic relationship between individual curators, their social networks, and technological design.     

Parameter estimation of a composite production function model based on improved artificial fish swarm algorithm and model application

The traditional Cobb–Douglas production function uses the compact mathematical form to describe the relationship between the production results and production factors in the production technology process. However, in macro-economic production, multi-structured production exists universally. In order to better demonstrate such input–output relation, a composite production function model is proposed in this article. In aspect of model parameter estimation, artificial fish swarm algorithm is applied. The algorithm has satisfactory performance in overcoming local extreme value and acquiring global extreme value. Moreover, realization of the algorithm does not need the gradient value of the objective function. For this reason, it is adaptive to searching space. Through the improved artificial fish swarm algorithm, convergence rate and precision are both considerably improved. In aspect of model application, the composite production function model is mainly used to calculate economic growth factor contribution rate. In this article, a relatively more accurate calculating method is proposed. In the end, empirical analysis on economic growth contribution rate of China is implemented.     

新型城镇化中的老城形象优化策略

城镇更新是城镇发展中"修复振兴、激发活力"的动力机制。而在拓展城镇规模,建设形成新城镇形象的过程中,保护老城风貌并采取各种优化、更新要素的方法传承形象特色,是不同历史阶段化解形象危机和传承文化特色的有效途径。尤其是在当前城乡一体、资源统筹的新型城镇化语境下,探索优化老城形象的策略,对未来城、镇、村的层级、梯度发展、增强城镇活力具有重要意义。本文从滁州老城物质风貌的显性与隐性形象要素入手,对形象要素"分裂、重构、整合"出的"生态、建筑、文化"等形态风貌关系进行分类分析,提出优化策略,为保护老城形象、传承文脉、转型发展注入新的活力。     

Producing information: communication and collaboration in the South African scientific community

Prior research has investigated the relationships between communication, collaboration and production of information/knowledge. Most of this research has been conducted either in developed countries where the internet facility is highly advanced or in developing countries with little internet access. Investigations in countries that fall in between these two extremes are rare. This study of respondents from higher education institutions and research institutes examines the relationship between collaboration and internet use, as well as productivity and internet use in the South African scientific system which has become a strong contributor to science in Africa.     

Cloud manufacturing system for sheet metal processing

Abstract

Cloud computing is changing the way industries and enterprises run their businesses. Cloud manufacturing is emerging as an approach to transform the traditional manufacturing business model, while helping the manufacturer to align production efficiency with its business strategy, and creating intelligent factory networks that enable collaboration across the whole enterprise. Many production planning and control (PPC) problems are essentially optimisation problems, where the objective is to develop a plan that meets the demand at minimum cost or maximum profit. Because the underlying optimisation problem will vary in the different business and operation phases, it is important to think about optimisation in a dynamic mechanism and in a number of interlinked sub-problems at the same time. Cloud manufacturing has the potential to offer decision support as a service and medium of communication in PPC. To solve these problems and produce collaboration across the supply chain, this paper provides an overview of the state of the art in cloud manufacturing and presents a model of cloud-based production planning and production system for sheet metal processing.