A note on solution concepts for nontransferable utility games

While many game-theoretic solution concepts pertain to conditions of transferable utility (TU), market transactions and other exchanges generally occur under nontransferable utility (NTU). Extant solutions translate TU solution concepts to the NTU case by utilizing endogenously determined utility weight vectors, which can violate notions of equity. A new solution procedure is developed that resolves this longstanding problem, and an existence proof is provided.     

Use of mixed methods designs in substance research: a methodological necessity in Nigeria

The utility of mixed methods (qualitative and quantitative) is becoming increasingly accepted in health sciences, but substance studies are yet to substantially benefit from such utilities. While there is a growing number of mixed methods alcohol articles concerning developed countries, developing nations are yet to embrace this method. In the Nigerian context, the importance of mixed methods research is yet to be acknowledged. This article therefore, draws on alcohol studies to argue that mixed methods designs will better equip scholars to understand, explore, describe and explain why alcohol consumption and its related problems are increasing in Nigeria. It argues that as motives for consuming alcohol in contemporary Nigeria are multiple, complex and evolving, mixed method approaches that provide multiple pathways for proffering solutions to problems should be embraced.     

Modeling the supplementing of human diets

This paper looks at the economic benefits of nutritional supplement use. Food plans, with and without nutritional supplements, are developed by maximizing a quadratic food utility function subject to nutrient and budget constraints. The quadratic programming solutions, which include both the marginal utilities and marginal costs of nutrients, are then presented. The results demonstrate the economic optimality of partial supplementation.     

煤矿粉尘爆炸预防措施研究

本文研究了煤矿粉尘爆炸的特点,分析了粉尘爆炸的预防和控制在现实中采用的综合措施。同时针对煤矿粉尘爆炸的现有防治技术进行了讨论,找出现有预防措施存在的问题并提出解决办法,为煤矿的安全生产在粉尘防爆领域提出建议。     

An analytical solution for the robust investment-reinsurance strategy with general utilities

In financial markets, different investors have different attitudes or preferences on the investment policies and reinsurance problems. For investors with different investment utilities, how to provide an optimal investment strategy is not only a very hard problem, but also an urgent problem to be solved. In this paper, we derive an analytical solution for the optimal allocation problem of investment-reinsurance with general-form utility function. The general utility function allows for varying relative risk aversion coefficient, which is an important feature in finance theory. However, obtaining analytical solutions for general utility function has been difficult or impossible. The solution presented in this paper is constructed through the homotopy analysis method (HAM) and written in the form of a Taylor series expansion. The fully nonlinear Hamilton–Jacobi–Bellman (HJB) equation is decomposed into an infinite series of linear PDEs, which can be solved analytically. In the end, three examples are presented to illustrate the convergence and accuracy of the method, it also demonstrates that different risk reference investors have different investment-reinsurance strategies.     

The relationship between revealed preference and the Slutsky matrix

This paper presents a method of calculating the utility function from a smooth demand function whose Slutsky matrix is negative semi-definite and symmetric. The calculated utility function is the unique upper semi-continuous function corresponding with the demand function. Moreover, we present an axiom for demand functions. We show that under the strong axiom, this new axiom is equivalent to the existence of the corresponding continuous preference relation. If the demand function obeys this axiom, the calculated utility function is also continuous. Further, we show that the mapping from the demand function into a continuous preference relation is continuous, which ensures the applicability of our results for econometrics. Moreover, if this demand function satisfies the rank condition, then our utility function is smooth. Finally, we show that under an additional axiom, the above results hold even if the demand function has corner solutions.     

锅炉燃用劣质煤的燃烧调整

本文通过对云浮发电厂所燃用的远离设计煤种的劣质煤进行了分析,分析出劣质煤的燃烧特性,根据劣质煤的燃烧特性,提出了一些合理的解决措施。使得锅炉在燃烧劣质煤时,其燃烧稳定性大大的增加。     

浅谈兼并重组煤矿企业基础管理

基础管理是实现企业安全管理科学化、规范化的重要手段,是解决重组煤矿事故多发状况的重要途径。只有筑牢了基础管理,企业方能实现安全发展。针对兼并重组煤矿的特点,提出了加强基础管理的措施和方法。     

新形势下煤矿政工工作创新探索

在新时期的煤矿企业中,企业政工工作的作用日益凸现出来。在这样的新形势下,也有很多问题随着政工工作地位的提高而显现出来。本文主要就煤矿企业政工工作的重要性以及新时期煤矿政工工作所反映出的一系列问题展开探讨,并进一步提出了相应的解决办法与建议,希望对广大煤矿企业政工工作人员起到一定的指导作用和帮助。     

煤矿瓦斯和煤尘的监测与控制模型

我国是世界上最大的煤炭生产国,煤炭的安全生产事故是中国重大安全事故之一。本文根据题目中提供的数据及煤炭行业的相关管理规定对我国某煤矿安全问题和控制作了合理分析,给出了解决问题的参考方法。     

Feasible sets,comparative risk aversion,and comparative uncertainty aversion in bargaining

We study feasible sets of the bargaining problem under two different assumptions: the players are subjective expected utility maximizers or the players are Choquet expected utility maximizers. For the latter case, we consider the effects on bargaining solutions when players become more risk averse and when they become more uncertainty averse.     

煤炭行业绿色物流探析

煤炭提供了我国国民经济主要的能源,是我国能源的支柱,同时也是我国经济和社会发展的重要保障.但是煤炭又是生态环境破坏的主要根源,煤炭物流是其中最重要的污染破坏环节之一.文章阐述了我国煤炭物流的运作流程和发展现状,从而分析了我国煤炭物流存在的问题,最后提出了要发展煤炭绿色物流以及相应的对策和解决方案,将煤炭物流由“黑色物流”转变为“绿色物流”.     

浅析我国燃煤燃前脱硫技术的应用现状与展望

我国是目前世界上最大的煤炭生产国和消费国,而煤炭燃烧造成的污染异常严重。每年我国大气中的二氧化硫含量90%是来自于燃煤排放的,而二氧化硫的排放又会造成酸雨,对人类及生态环境会造成极为严重的危害,为此国家大力开发的低炭、洁净能源,水力发电、油、气等资源得到迅速发展。作为煤炭生产企业,应从可持续发展的战略观点出发,积极推行煤脱硫技术,减少二氧化硫的排放,保护生态环境。本文将对燃煤的燃前脱硫技术的应用现状做一分析,并对未来的发展提出自己浅显的看法。     

Axiomatic approach to approximate solutions in multiobjective optimization

An axiomatic approach is introduced in order to study the approximate solution map of a vector optimization problem in the image space. We investigate the possibility to formulate an appropriate notion of approximate solutions that is compatible with von Neumann–Morgenstern utility theory. An impossibility result is proved in the sense that, whenever all of the axioms are satisfied, either the set of the approximate solutions is a subset of the exact solutions of the problem, or it coincides with the whole admissible set. Moreover, the geometry of the approximate solution map is studied in some special cases.      

浅谈我国中小型煤矿企业安全事故的原因与对策

针对我国各地区中小型煤矿企业安全生产过程中所存在的问题进行分析,同时提出煤矿安全生产降低事故率需要解决的问题。     

Residential spatial growth with perfect foresight and multiple income groups

This paper presents explicit solutions for expanding monocentric cities with two or more income groups. Housing is durable but deteriorates over time, and redevelopment cannot take place. Landlords have perfect foresight. The utility function and housing technology are Cobb-Douglas. Population, per capita income, and transportation costs per mile change at constant percentage rates. The model is solved analytically, using an infinite time horizon. As development proceeds outward, a constant fraction of land is developed with high-income housing, and the remaining land is reserved for future low-income development. At any time, housing is constructed at one distance for high-income consumers, and at a lesser distance for low-income consumers. High-income housing is first occupied by high-income consumers, then filters to low-income consumers, and is ultimately abandoned. Low-income housing is first occupied by low-income households, and ultimately abandoned.     

Product attributes and models of multiple discreteness

Demand for product characteristics is examined within the context of models that allow for both corner and interior solutions corresponding to zero and non-zero demand. Product attribute information is associated with marginal utility and curvature (satiation) parameters of various utility functions. Empirical applications demonstrate the need for incorporating characteristics in a fairly general way. We also compare our approach to an ideal point and pure Lancasterian versions of our nonlinear utility model. The data support our model over either the ideal point or Lancasterian variants.     

Lindahl's solution and values for a public-goods example

An example of an economy with a public good is presented with a non-atomic measure space of agents and money (transferable utility medium). Three solutions are computed: the Lindahl solution, the Shapley value, and the Harsanyi-Selten value. The three are found to differ significantly in their assignment of the societal benefits attributable to the presence of the public good.     

试论煤矿开采方法与技术应用

随着社会经济的发展,我国许多煤矿由于生产技术和生产设备的落后,及安全条件差而导致被关闭。所以,提高煤矿开采技术政策,使煤矿开采技术机械化以及提高生产设备,改进煤矿的开采方法和技术工艺对我国煤矿的开采起着重要意义。     

浅谈筒仓滑模施工工艺

随着煤矿资源整合矿井的重组,煤矿基本工程建设发展壮大,越来越多的资源整合煤矿为扩大产能,同时,为节约占地面积,加强环境保护,建设原煤储仓成为矿井建设的配套工程。文章就此探讨了建设原煤储仓的关键技术——筒仓滑模施工工艺。