在炼钢生产中如何降低石墨电极消耗

石墨电极消耗率是电炉炼钢生产的一个重要技术经济指标。近年来我厂1.5t电弧炉炼钢生产中,石墨电极消耗率呈现上升趋势。针对这一问题,我们实施现场攻关,发现电极折断消耗是石墨电极消耗大的主要原因。通过对电弧炉设备大修、改善炼钢环境、规范炉前操作行为,有效地解决了炼钢生产中电极折断消耗高的问题,使石墨电极消耗率从18.7kg/t降低到8.4kg/t,且取得了良好的技术效果和经济效益。     

Individual attitudes towards the impact of multinational corporations on local businesses: how important are individual characteristics and country-level traits?

We study the importance of individual characteristics and national factors influencing individual attitudes towards the impact of multinational corporations on local businesses. Our sample includes more than 40 000 respondents in 29 countries from the 2003 National Identity Survey conducted by the International Social Survey Programme. We find that individual demographic factors and socioeconomic status, such as gender, age, income and education, are strong predictors of their attitudes. For example, income and education are positively associated with favourable attitudes towards the impact of multinational corporations (MNCs) on local businesses while age is negatively associated with individual attitudes towards MNCs. In addition, hierarchical ordered logit model results show that approximately 8% of total variations in individual attitudes around our sample mean are not explained by differences in personal traits. Instead, they are due to country-level heterogeneity such as, but not limited to, different degrees of openness or different aggregate income.     

Balancing the risk of ‘Lazearian’ interrupters and the benefits of educational and social peers: tracing parental preferences for class-size reduction

Using Danish survey data from a choice experiment, parental preferences for class-size reduction are estimated. While parents with children in large classes are willing to pay for class-size reduction, parents with children in small classes are reluctant and even express negative utility for further class-size reduction. We interpret this as parents balancing the risk of ‘Lazearian’ interrupters and the benefits of educational and social peers when forming their preferences for class size.     

新常态下文化产业的发展路径探析

随着中国经济进入新常态，中国政治生活、社会建设和文化发展生活进入新阶段，文化产业如何适应新的发展趋势，实现新常态下的二次创业，发展的路径选择就成为亟待解决的迫切课题。论文借势消费引领战略、创新驱动战略、产业融合战略、文化金融战略、文化科技战略和国际文化贸易发展战略，提出文化产业要顺应消费的新方向、融合互联网和金融创新催生的新业态、汇聚创客群体、利用大数据新手段和国际贸易新通道，从而实现文化产业在新常态下的新发展。     

基于公共选择视角的“灰色收入”防控机制创新

灰色收入即为非法收入及其他来源不明的收入，具有参与范围扩大化、标的形式多样化、实地操作隐蔽化、实现标准奢侈化、实现手段智能化等趋势特点。产生原因有法律缺失、教育缺位、监管失严、权力信息不明等，对应的防控措施有严格法律界定、加强生活圈管理、加强多方监管、推进收入和财产公示等。     

Turning values concrete: the role and ways of business selection in local currency schemes

Alternative consumption schemes require the selection of producers and traders according to criteria and through processes that should make alternative values concrete. The way values turn concrete is crucial for the effectiveness of such projects. This paper investigates the ways criteria and processes are defined and their real meanings and uses through the case of associative local currencies. Drawing on the framework of proximities, it analyses local currency schemes as combining proximities (geographical and non-geographical) and selection processes set up for providers wishing to join. Selection processes may be based on a charter, an approval committee and screening criteria. The objectives of the selection, its measures in principle, the way in which it is applied as well as the practical consequences are discussed. Even when charters and formal participatory schemes for selecting providers are established, proximities appear as the keystone of selection and trust.     

The effect of firm scale and CSR geographical scope of impact on consumers' response

The role of corporate social responsibility (CSR) in shaping consumer perception and attitude has received many attentions both in the academia and practitioner world. While this domain has invited numerous research, but research highlighting how consumers react toward learning the size of a firm conducting CSR and geographical scope of the CSR impact is still scarce. We investigate how consumers shape their attitude and consumption behavior after knowing that the CSR action is done by a small, locally-owned business that brings impact to the local community through an experimental study. Our study adds a shade in understanding how the effect of a firm size and geographical scope of CSR impact might increase consumers' favorable attitude and behavior toward the business and its products. Our findings show that when consumers learn that the firm conducting CSR is a small, locally-owned (in coffee shop business) that directs its action toward local beneficiaries, they demonstrate more favorable attitudes toward the action and the firm, which manifest in the form of better intentions to acquire the product as well as willingness to pay premium prices for it. Our findings confirm the US consumers' love affair with local businesses, in particular. While the findings generally benefit small, locally-owned businesses, they also suggest recommendations for large, multinational businesses to design their marketing strategy in an attempt to increase favorable reactions from consumers.     

Optimal investment-consumption-insurance with random parameters

This paper discusses an optimal investment, consumption, and life insurance purchase problem for a wage earner in a complete market with Brownian information. Specifically, we assume that the parameters governing the market model and the wage earner, including the interest rate, appreciation rate, volatility, force of mortality, premium-insurance ratio, income and discount rate, are all random processes adapted to the Brownian motion filtration. Our modeling framework is very general, which allows these random parameters to be unbounded, non-Markovian functionals of the underlying Brownian motion. Suppose that the wage earner’s preference is described by a power utility. The wage earner’s problem is then to choose an optimal investment-consumption-insurance strategy so as to maximize the expected, discounted utilities from intertemporal consumption, legacy and terminal wealth over an uncertain lifetime horizon. We use a novel approach, which combines the Hamilton–Jacobi–Bellman equation and backward stochastic differential equation (BSDE) to solve this problem. In general, we give explicit expressions for the optimal investment-consumption-insurance strategy and the value function in terms of the solutions to two BSDEs. To illustrate our results, we provide closed-form solutions to the problem with stochastic income, stochastic mortality, and stochastic appreciation rate, respectively.     

Kernel-type estimators for the distortion risk premiums of heavy-tailed distributions

A new kernel-type estimator for the distortion risk premiums of heavy-tailed losses is introduced. Using a least-squares approach, a bias-reduced version of this estimator is proposed. Under suitable assumptions, the asymptotic normality of the given estimators is established. A small simulation study, to illustrate the performance of our method, is carried out.     

朱载堉才是“需求层次理论”的鼻祖——且更独特,更显棋高一着

以往学术界都把美国心理学家马斯洛奉为需求层次理论的鼻祖;但最新的研究成果,彻底推翻了这一陈见,认为中国明朝的科学家朱载堉才是需求层次理论的鼻祖,比美国人马斯洛还要早约三百六十多年,且朱载堉对需求层次的认知,要比马斯洛更独特,更显棋高一着。