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大学生就业的“非理性”动机与对策研究
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作者 黄芳 《成都航空职业技术学院学报》 2014年第2期55-56,71,共3页
大学生就业难并非完全取决于自身实力不济,而往往在于大学生就业时存在着"非理性"动机。大学生就业"非理性"动机主要表现为"兴趣至上论""职位饱和论"以及"金钱唯上论"。文章在分析... 大学生就业难并非完全取决于自身实力不济,而往往在于大学生就业时存在着"非理性"动机。大学生就业"非理性"动机主要表现为"兴趣至上论""职位饱和论"以及"金钱唯上论"。文章在分析大学生就业"非理性"动机产生原因后,力求找到克服就业"非理性"动机的取胜之匙。 展开更多
关键词 大学生就业 非理性动机 对策
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高管过度自信与农业上市公司背农动机的实证研究 被引量:2
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作者 卢君生 朱艳阳 王为一 《西安财经学院学报》 CSSCI 2013年第4期70-76,共7页
在分析农业上市公司背农动机时,现有研究主要采用传统的理性经济人分析框架。文章以高管过度自信作为区分背农行为理性与否的标准,采取直接论证法和间接推导法相结合的方式,实证分析了不同背农动机的显著性与相对重要性。研究结果表明:... 在分析农业上市公司背农动机时,现有研究主要采用传统的理性经济人分析框架。文章以高管过度自信作为区分背农行为理性与否的标准,采取直接论证法和间接推导法相结合的方式,实证分析了不同背农动机的显著性与相对重要性。研究结果表明:非理性因素的引入大幅提升了对背农行为及其绩效后果的解释能力。相对于提高绩效的经济理性动机和降低风险的组织理性动机而言,背农行为的非理性动机和追求高管私利的个人理性动机更为显著。 展开更多
关键词 农业上市公司 背农动机 非理性动机 企业高管
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Modeling of rock failure based on physical cellular automata 被引量:5
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作者 马志涛 谭云亮 张霆 《Journal of Southeast University(English Edition)》 EI CAS 2005年第3期348-352,共5页
To analyze the effects of heterogeneous material characteristics on rock failure,a micro-heterogeneous physical cellular automata (Mh-PCA) model is introduced according to the cellular automata theory from a general... To analyze the effects of heterogeneous material characteristics on rock failure,a micro-heterogeneous physical cellular automata (Mh-PCA) model is introduced according to the cellular automata theory from a general power view.In this model,the neighbor is the Moore pattern and the Weibull distribution is adopted to simulate the rock heterogeneousness.Using this model,the evolvements and acoustic emission of rock failure are simulated for four materials of different degree of homogeneousness (m=1,5,10,15).The results show that the heterogeneous characteristic has a great effect on the rock failure,the more the homogeneousness,the fewer the crack branches and the more concentrated acoustic emissions.The physical cellular automata theory gives a new idea for studying rock failure. 展开更多
关键词 rock failure acoustic emission heterogeneous characteristic physical cellular automata Weibull distribution
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Financial Rogue Waves 被引量:18
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作者 闫振亚 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第11期947-949,共3页
We analytically give the financial rogue waves in the nonlinear option pricing model due to Ivancevic,which is nonlinear wave alternative of the Black-Scholes model.These rogue wave solutions may be used to describe t... We analytically give the financial rogue waves in the nonlinear option pricing model due to Ivancevic,which is nonlinear wave alternative of the Black-Scholes model.These rogue wave solutions may be used to describe thepossible physical mechanisms for rogue wave phenomenon in financial markets and related fields. 展开更多
关键词 NLS equation nonlinear option pricing model financial rogue waves
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Approximate Solution for Mechanism of Thermally and Wind-driven Ocean Circulation 被引量:4
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作者 MO Jiaqi LIN Wantao LIN Yihua 《Chinese Geographical Science》 SCIE CSCD 2010年第5期383-388,共6页
The thermally and wind-driven ocean circulation is a complicated natural phenomenon in the atmospheric physics. Hence we need to reduce it using basic models and solve the models using approximate methods. A non-linea... The thermally and wind-driven ocean circulation is a complicated natural phenomenon in the atmospheric physics. Hence we need to reduce it using basic models and solve the models using approximate methods. A non-linear model of the thermally and wind-driven ocean circulation is used in this paper. The results show that the zero solution of the linear equation is a stable focus point, which is the path curve trend origin point as time (t) trend to infinity. By using the homotopic mapping perturbation method, the exact solution of the model is obtained. The homotopic mapping perturbation method is an analytic solving method, so the obtained solution can be used for analytic operating sequentially. And then we can also obtain the diversified qualitative and quantitative behaviors for corresponding physical quantities. 展开更多
关键词 global climate atmosphere-ocean oscillation homotopic mapping approximate solution
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A nonlinear bottom-following controller for underactuated autonomous underwater vehicles 被引量:6
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作者 贾鹤鸣 张利军 +3 位作者 边信黔 严浙平 程相勤 周佳加 《Journal of Central South University》 SCIE EI CAS 2012年第5期1240-1248,共9页
The bottom-following problem for underactuated autonomous underwater vehicles (AUV) was addressed by a new type of nonlinear decoupling control law. The vertical bottom-following error and pitch angle error are stab... The bottom-following problem for underactuated autonomous underwater vehicles (AUV) was addressed by a new type of nonlinear decoupling control law. The vertical bottom-following error and pitch angle error are stabilized by means of the stem plane, and the thruster is left to stabilize the longitudinal bottom-following error and forward speed. In order to better meet the need of engineering applications, working characteristics of the actuators were sufficiently considered to design the proposed controller. Different from the traditional method, the methodology used to solve the problem is generated by AUV model without a reference orientation, and it deals explicitly with vehicle dynamics and the geometric characteristics of the desired tracking bottom curve. The estimation of systemic uncertainties and disturbances and the pitch velocity PE (persistent excitation) conditions are not required. The stability analysis is given by Lyapunov theorem. Simulation results of a full nonlinear hydrodynamic AUV model are provided to validate the effectiveness and robustness of the proposed controller. 展开更多
关键词 underactuated autonomous underwater vehicle bottom-following nonlinear iterative sliding mode
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Skin friction reduction characteristics of variable ovoid non-smooth surfaces 被引量:11
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作者 Xiao-wen SONG Peng-zhe LIN +1 位作者 Rui LIU Pei ZHOU 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2017年第1期59-66,共8页
The use of bionic non-smooth surfaces is a popular approach for saving energy because of their drag reduction property. Conventional non-smooth structures include riblets and dimples. Inspired by sand dunes, a novel v... The use of bionic non-smooth surfaces is a popular approach for saving energy because of their drag reduction property. Conventional non-smooth structures include riblets and dimples. Inspired by sand dunes, a novel variable ovoid non-smooth structure is proposed in this study. The body of the variable ovoid dimple was designed based on three size parameters, the radius, semimajor, and depth, and a 3D model was created based on UG software. The constructed variable dimples were placed in a rectangular array on the bottom of a square tube model. Following ANSYS meshing, the grid model was imported into FLUENT, where the flow characteristics were calculated. Results of skin friction reduction were achieved and the effect of the design parameters on different variable ovoid dimples was obtained by orthogonal testing. Various aspects of the skin friction reduction mechanism were discussed including the distribution of velocity vectors, variation in boundary layer thickness, and pressure distribution. 展开更多
关键词 Variable ovoid dimple Non-smooth surface Numerical simulation Skin friction reduction
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