Analysis of occupational health hazards and associated risks in fuzzy environment: a case research in an Indian underground coal mine

This paper presents a unique hierarchical structure on various occupational health hazards including physical, chemical, biological, ergonomic and psychosocial hazards, and associated adverse consequences in relation to an underground coal mine. The study proposes a systematic health hazard risk assessment methodology for estimating extent of hazard risk using three important measuring parameters: consequence of exposure, period of exposure and probability of exposure. An improved decision making method using fuzzy set theory has been attempted herein for converting linguistic data into numeric risk ratings. The concept of ‘centre of area’ method for generalized triangular fuzzy numbers has been explored to quantify the ‘degree of hazard risk’ in terms of crisp ratings. Finally, a logical framework for categorizing health hazards into different risk levels has been constructed on the basis of distinguished ranges of evaluated risk ratings (crisp). Subsequently, an action requirement plan has been suggested, which could provide guideline to the managers for successfully managing health hazard risks in the context of underground coal mining exercise.     

行政、事业单位会计核算中存在的问题及对策

近年来,随着支付改革的深化,部分基层行政、事业单位不能很好适应财政科学化、精细化改革的要求。文章认为在行政、事业单位会计核算上还存在一些不容忽视的问题,需要认真加以解决。     

Dynamic prediction of hedge fund survival in crisis-prone financial markets

This study focuses on dynamic changes in survival probabilities over the lifetimes of hedge funds. To model such probabilities, a mixed Cox proportional hazards (CPH) model-specifically, a survival/hazard model with time-varying covariates and fixed covariates- is employed. Resulting dynamic survival probabilities show that the mixed CPH model provides significantly higher accuracy in predicting hedge fund failure than other models in the literature, including fixed covariate CPH models and discrete logit models. Our results are useful to investors and regulators of hedge funds in crisis-prone financial markets.     

南水北调东线工程(山东段)调水区地质灾害分析

通过分析东线(山东段)调水区的水文、气候、地质、地貌等条件，初步论述了东线(山东段)调水工程中面临的主要地质问题，如塌陷(包括采煤塌陷、岩溶塌陷)。地面沉降，地裂缝，地震等问题，提出开展地质普查工作、完善监测系统和提高预报的准确性、抗灾和救灾、宣传教育和与减灾立法等建议。     

谈变电站的雷击危害及防雷措施

变电站遭遇雷击引起的跳闸事故很多,文章分析了变电站雷电危害的形式,同时针对各种不同拍雷电危害形式采取不同的防雷措施,以达到有效地防止雷击引起事故的目的。     

浅议矿山地质灾害的防治

地质灾害既是经济问题,也是社会问题。矿山地质灾害是广义地质灾害的一种,它对资源、环境的破坏作用和社会影响正日趋严重,已不容忽视。我国是采矿大国,只有建立了全面的矿山地质灾害的防护,才能减轻井下作业人员的安全。     

Semiparametric estimation of a censored regression model with an unknown transformation of the dependent variable

This paper presents a method for estimating the model Λ(Y)=min(β′X+U, C), where Y is a scalar, Λ is an unknown increasing function, X is a vector of explanatory variables, β is a vector of unknown parameters, U has unknown cumulative distribution function F, and C is a censoring threshold. It is not assumed that Λ and F belong to known parametric families; they are estimated nonparametrically. This model includes many widely used models as special cases, including the proportional hazards model with unobserved heterogeneity. The paper develops n^1/2-consistent, asymptotically normal estimators of Λ and F. Estimators of β that are n^1/2-consistent and asymptotically normal already exist. The results of Monte Carlo experiments illustrate the finite-sample behavior of the estimators.     

R&D Outsourcing and the Effectiveness of Intangible Investments: Is Proprietary Core Knowledge Walking out of the Door?

Intangible relationship‐specific investments can be double‐edged swords, as they facilitate not only the governance of business relationships but also undesired knowledge transfers. Building on transaction costs theory and the relational view of alliances, we analyse the effectiveness of these investments in R&D outsourcing agreements from the viewpoint of the client. We argue that, when outsourcing to business firms, the safeguards adopted by the clients to prevent spillovers may reduce the effectiveness of the supplier's specialized investments. Using original survey data from 170 European and US technology‐intensive firms, we find that the contribution of these investments to client performance decreases the more a client's core knowledge is required to perform the service, except when outsourcing to non‐profits. This suggests that as the appropriability hazards associated with outsourcing to business firms rise, the client is able to capture less value from the supplier's relationship‐specific investments.     

A critical review of the application of environmental scenario exercises

Scenario exercises have become instrumental across multiple fields, from their original usage in business and military planning, to being ubiquitous in environmental planning and policy formation. This article critically reviews whether there are explicit and imminent divisions between how scenario exercises are used and discussed, with particular focus on the literature of qualitative scenarios concerning environmental challenges. The authors interrogate what scenario exercises are in actual practice, in the context of what they are used for and how they are designed, before then considering the criteria for determining ‘success’ for a scenario exercise. The particular focus of the literature analysed is in the emergence of the discipline of ‘environmental scenarios’, being scenarios concerned with 21st Century environmental challenges such as the influence of climate change on the notion of natural hazards.     

三六水库除险加固设计

三六水库投入运行至今已50多年,水库设施已严重老化,进行加固实施后将排除众多安全隐患,提高工程安全度,为农业生产和人民生命财产提供可靠保障,充分发挥水库的综合利用效益及较好的社会效益。为防洪保护区的社会、经济、环境的可持续发展创造有利条件。