MATLAB在异步电动机变频调速教学中的应用

改革电机与拖动专业课课堂教学中的常规教学法,将计算机仿真软件引入到课堂教学中,通过对三相异步电动变频调速的具体仿真实例讲解,激发学生学习兴趣,从而提高课堂听课效率。     

Leading by example: The case of leader OCB.

The importance of leading by personal example or role modeling for effective leadership has been recognized in many leadership theories. However, leaders' ability to influence group behavior through exemplary behavior has received little attention in empirical work. This study explores leading by example through theoretical development and empirical testing of a moderated mediation model of the potential effects of leader organizational citizenship behavior (OCB). This model suggests that a leader's OCB may promote group OCB directly and indirectly by enhancing the group's belief that OCB is worthy. It also specifies the moderators of the direct and indirect effects of leader OCB on group OCB. Data from 683 members of 67 intact work groups, 67 group managers, and their supervisors support the hypothesized model. The theoretical and practical implications of these findings are discussed. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

实用故障树定量分析原理与应用实例

阐述了实用故障树定量分析原理。并介绍了相应的实例。基于Fortran PowerStation平台．利用Fortran编程计算出结果,得出了具有实用性的结论。对于常见的可靠性问题,具有普遍的指导意义。     

造纸废水处理新思路一入工湿地系统

简述了人工湿地的概念、特征及分类,阐述了人工湿地处理造纸废水的机理。并以山东省沾化齐明纸业有限公司为例,介绍了人工湿地系统处理造纸废水的运行效果及效益分析,展望了人工湿地用于处理造纸废水在我国的应用前景。     

油气层计分解释评价方法在辽河滩海葵东区块的应用

油气水层解释评价是油气勘探开发的重要环节,由于单一的录井资料都有其局限性,如何把各种录井资料结合起来是有效解释评价的关键。针对此问题,笔者提出了油气层计分解释评价方法,通过对辽河油田897口井的1408个稀油储集层各项资料统计,确定了辽河油田稀油储集层各项特征参数统计计分标准;在此基础上,借助该计分方法原理对辽河油田东、西部凹陷稀油区块近500个稀油层的计分分析,确定了油气层计分方法解释划分标准和解释原则,其在辽河油田东、西部凹陷稀油区块6年的实际应用表明,试油符合率达到85％以上。油气层计分解释评价方法作为辽河滩海葵东区块油气层综合解释评价的主要参考手段,2005-2008年闻在15口井的251层的解释评价中得到广泛应用,试油符合率达到90％以上。该方法综合考虑了各项录井资料特征参数的显示特征,为今后新区块的油气勘探开发提供了评价手段。     

利用地震属性钻前预测井壁稳定性

钻前准确预测井壁稳定性是防止钻进过程中井壁失稳的有效手段。声波时差和地层密度是井壁稳定分析的两个关键参数。根据地震记录与地层声波时差及密度之间存在的非线性关系，提出了利用地震属性钻前预测井壁稳定性的方法。从井旁地震记录中提取地震属性，通过RBF神经网络在已钻井段的地震属性与声波时差及密度之间建立起映射模型，以此为基础预测待钻地层的声波时差和密度。运用预测结果结合井壁稳定力学模型，确定岩石力学参数和地应力状态，计算井壁坍塌压力和破裂压力，确定安全钻井液密度窗口，实现钻前井壁稳定预测。该方法在塔里木油田的应用中取得了良好的预测效果。     

浅谈涌泉灌溉技术在周至县的发展前景

简单介绍了涌泉节水灌溉技术。在了解该地区基本状况(包括气候状况和农业状况)的基础上,通过分析该灌溉技术在各地的应用实例,总结应用实例经验,简要分析涌泉灌溉技术在周至县的发展前景。     

人工湿地在造纸废水处理中的应用前景

简述了人工湿地的概念、特征及分类,阐述了人工湿地处理造纸废水的机理,并以山东省沾化齐明纸业有限公司为例,介绍了人工湿地系统处理造纸废水的运行效果及效益分析,可为相似企业合理有效利用人工湿地系统提供借鉴。分析了人工湿地处理造纸废水的优势和存在的问题,展望了人工湿地用于处理造纸废水在我国的应用前景。     

膨胀套管的弹塑性理论分析

分析认为，膨胀套管在膨胀过程中先进入弹性阶段，然后进入弹塑性阶段，最后进入塑性流动阶段。采用弹塑性分析方法，对膨胀套管膨胀过程中套管内壁的受力与变形进行了研究，模拟了其成形的过程，并建立了解析解，为膨胀套管膨胀操作过程中确定关键操作参数提供了理论支持。根据推导出的力学模型，计算出了外径107．9mm、钢级为J55的膨胀套管膨胀到直径139．7mm时膨胀芯头拉头处的轴向力为195．94kN。     

Study on Storage Reliability Evaluation for Ammunition Using Gibbs Sampler

For the gradual maturity of Bayesian survival analysis theory, as well as the defects of the traditional methods for storage reliability evaluation, the Bayesian survival analysis method is proposed to build regression models for reliability in the random truncated test. These models can reflect the influences of different environments on the ammunition storage lifetime. As an example, the common exponential distribution is used here, and Markov chain Monte Carlo（MCMC） method based on Gibbs sampling dynamically simulates the Markov chain of the parameters＇ posterior distribution. Also, the parameters＇ Bayesian estimations are calculated in the random truncated condition. The simulation results show that the proposed method is effective and directly perceived.