Political skill is a critical interpersonal competency.However,the self-reported political skill scale is unsuitable for personnel selection beacuse it may lead to socially desirable responses,thereby compromising the...Political skill is a critical interpersonal competency.However,the self-reported political skill scale is unsuitable for personnel selection beacuse it may lead to socially desirable responses,thereby compromising the authenticity of the test scores.Consequently,the absence of a valid assessment method limits the application of political skill in selection con-texts.In this study,we applied the situational judgment test(SJT)method to measure political skill and conducted two sub-studies to evaluate the reliability and validity of the situational judgment test of political skill(SJT-PS).Study 1 focused on the development and initial testing of the SJT-PS.The results demonstrated that the SJT-PS possessed strong structural validity and reliability.Study 2 aimed to assess the criterion-related and incremental validity of the SJT-PS.To evaluate the predictive validity of the SJT-PS in selection contexts,we first compared the correlations between the SJT-PS and self-reported political skill with social desirability.Subsequently,we selected team-member exchange(TMX)and workplace popularity as criteria.The results indicated that the SJT-PS was less affected by social desirability,while self-reported political skill exhibited a significant positive correlation with social desirability.Additionally,the SJT-PS positively pre-dicted TMX and workplace popularity and demonstrated incremental validity over the self-reported political skill scale.展开更多
Room and pillar sizes are key factors for safe mining and ore recovery in open-stope mining. To investigate the influence of room and pillar configurations on stope stability in highly fractured and weakened areas, an...Room and pillar sizes are key factors for safe mining and ore recovery in open-stope mining. To investigate the influence of room and pillar configurations on stope stability in highly fractured and weakened areas, an orthogonal design with two factors, three levels and nine runs was proposed, followed by three-dimensional numerical simulation using ANSYS and FLAC3~. Results show that surface settlement after excavation is concentrically ringed, and increases with the decrease of pillar width and distances to stope gobs. In the meantime, the ore-control fault at the ore-rock boundary and the fractured argillaceous dolomite with intercalated slate at the hanging wall deteriorate the roof settlement. Additionally, stope stability is challenged due to pillar rheological yield and stress concentration, and both are induced by redistribution of stress and plastic zones after mining. Following an objective function and a constraint function, room and pillar configuration with widths of 14 m and 16 m, respectively, is presented as the optimization for improving the ore recovery rate while maintaining a safe working environment.展开更多
According to the randomness and uncertainty of information in the safety diagnosis of coal mine production system (CMPS), a novel safety diagnosis method was proposed by applying fuzzy logic inference method, which co...According to the randomness and uncertainty of information in the safety diagnosis of coal mine production system (CMPS), a novel safety diagnosis method was proposed by applying fuzzy logic inference method, which consists of safety diagnosis fuzzifier, defuzzifier, fuzzy rules base and inference engine. Through the safety diagnosis on coal mine roadway rail transportation system, the result shows that the unsafe probability is about 0.5 influenced by no speed reduction and over quick turnout on roadway, which is the most possible reason leading to the accident of roadway rail transportation system.展开更多
基金supported by the National Nature Science Foundation of China(7191001010)。
文摘Political skill is a critical interpersonal competency.However,the self-reported political skill scale is unsuitable for personnel selection beacuse it may lead to socially desirable responses,thereby compromising the authenticity of the test scores.Consequently,the absence of a valid assessment method limits the application of political skill in selection con-texts.In this study,we applied the situational judgment test(SJT)method to measure political skill and conducted two sub-studies to evaluate the reliability and validity of the situational judgment test of political skill(SJT-PS).Study 1 focused on the development and initial testing of the SJT-PS.The results demonstrated that the SJT-PS possessed strong structural validity and reliability.Study 2 aimed to assess the criterion-related and incremental validity of the SJT-PS.To evaluate the predictive validity of the SJT-PS in selection contexts,we first compared the correlations between the SJT-PS and self-reported political skill with social desirability.Subsequently,we selected team-member exchange(TMX)and workplace popularity as criteria.The results indicated that the SJT-PS was less affected by social desirability,while self-reported political skill exhibited a significant positive correlation with social desirability.Additionally,the SJT-PS positively pre-dicted TMX and workplace popularity and demonstrated incremental validity over the self-reported political skill scale.
基金Projects(50934002,51074013,51104100)supported by the National Natural Science Foundation of ChinaProject(IRT0950)supported by the Program for Changjiang Scholars and Innovative Research Team in University of China
文摘Room and pillar sizes are key factors for safe mining and ore recovery in open-stope mining. To investigate the influence of room and pillar configurations on stope stability in highly fractured and weakened areas, an orthogonal design with two factors, three levels and nine runs was proposed, followed by three-dimensional numerical simulation using ANSYS and FLAC3~. Results show that surface settlement after excavation is concentrically ringed, and increases with the decrease of pillar width and distances to stope gobs. In the meantime, the ore-control fault at the ore-rock boundary and the fractured argillaceous dolomite with intercalated slate at the hanging wall deteriorate the roof settlement. Additionally, stope stability is challenged due to pillar rheological yield and stress concentration, and both are induced by redistribution of stress and plastic zones after mining. Following an objective function and a constraint function, room and pillar configuration with widths of 14 m and 16 m, respectively, is presented as the optimization for improving the ore recovery rate while maintaining a safe working environment.
基金Project(2006BAK04B0302)supported by the National Science and Technology Pillar Program during the 11th Five-year Plan of China
文摘According to the randomness and uncertainty of information in the safety diagnosis of coal mine production system (CMPS), a novel safety diagnosis method was proposed by applying fuzzy logic inference method, which consists of safety diagnosis fuzzifier, defuzzifier, fuzzy rules base and inference engine. Through the safety diagnosis on coal mine roadway rail transportation system, the result shows that the unsafe probability is about 0.5 influenced by no speed reduction and over quick turnout on roadway, which is the most possible reason leading to the accident of roadway rail transportation system.
