我国工读学校职业化办学方向探索

文中从工读学校发展历程综合分析了目前我国工读学校办学中存在的性质定位危机、生源危机、办学资源危机等问题及其成因,并在此基础上,通过对工读学校职业教育机构的本质属性的分析,提出工读学校走职业化办学道路,以促进工读学校的持续健康发展的策略。     

将洋山深水港建设成中国第一座花园港口

介绍了绿色港口的发展背景。详细阐述了洋山深水港发展绿色港口的优势,并且讲述了洋山深水港绿色港口建设的技术路线。最后提出在把洋山深水港建设成花园港口中要优先推行的9项措施。     

异步电机效率优化算法设计

针对异步电机效率优化问题，提出混合在线式直流最小功率模糊搜索效率优化控制算法（FLSC）。算法利用损耗模型控制（LMC）的研究成果，设计新型比例因子提取策略，可以实时在线获得电机各稳态工况下FLSC输入和输出变量的比例因子，预先规划了算法搜索控制的方向，保证了算法的快速收敛性。根据异步电机的特性及先期的综合实验数据分析，对模糊控制用模糊集合及其隶属度函数进行系统化设计，对输入变量的ZE模糊集进行梯形隶属度函数设计，对输出变量进行正负不对称隶属度函数设计，从而解决了系统在效率最优点处的振荡问题。对小功率异步电机系统的计算机仿真及台架实验表明：针对异步电机的轻载运行工况，FLSC算法能显著提高异步电机系统的控制性能；对于异步电机转子电阻参数变化的工况也具有很好的鲁棒性。     

Development of a semi-empirical friction model in automotive driveshaft joints

High speed and sport utility vehicles with large joint articulation angle demand lower friction in automotive driveshaft joints to meet noise and vibration comfort levels. Thus a more thorough understanding of internal friction characteristics and mechanisms is required. In this paper, a friction model in automotive driveshaft joints was developed through the use of test data from an instrumented Constant Velocity (CV) joint friction apparatus with actual driveshaft assemblies. Experiments were conducted under different realistic operating conditions of oscillatory speeds, CV joint articulation angles, lubrication, and torque. The experimental data was used to develop a physics-based semi-empirical CV joint internal friction model as a function of different CV joint operating parameters. It was found that the proposed friction model captures the experimental results well. Also the friction model estimates the generated axial force (GAF) in tripod CV joints well, which is the main source of force that causes vehicle vibration problems.     

沥青混合料CT扫描切片图像分割算法研究

为科学地利用工业CT扫描的沥青混合料断面图像,通过比较图像分割学科的阈值法及模式识别领域的混合高斯模型及模糊C均值聚类三种方法,采取一系列二分类的策略较好地将二维切片图像区分为几类物质,并实现了自动批处理大量图片的过程,最后采用马歇尔试件进行了验证。     

港口粉尘污染防治技术研究进展

综述了港口粉尘污染现状、常用防治方法,在此基础上对港口粉尘防治的前沿技术——防风网、煤筒仓、煤炭防尘水分自动化管理系统进行了详细的介绍。     

基于索网找形的吊弦长度计算方法探讨

在总结现有吊弦计算方法的基础上提出一种新的计算方法,阐述了新方法的基本理论基础和计算流程.最后对2种方法优缺点进行了总结.本文提出的新方法对传统的计算方法的不足进行了弥补,有理论指导意义.     

现代港口物流发展的投入产出评价体系

分析了我国港口发展的现状,介绍了港口物流投放产出模型的编制方法和相关表格,阐述了港口物流投入产出模型的应用分析。以避免对港口过度投入和重复建设所带来的产出效益降低,提出以投入产出模型为基础,对我国港口物流发展的投入产出规划提供理论指导。     

企业租用电力设备的财务效益

由于当前的金融危机，许多企业正在寻找出路，避免大额资本支出、固定资产投资和雇佣昂贵的雇员。与此同时，这些企业需要为将来经济的好转做打算，他们知道在不远的将来经济形势必有所改善，那时他们的企业必须为经济复苏做好准备。     

Study on driver model for hybrid truck based on driving simulator experimental results

In this paper, a proposed car-following driver model taking into account some features of both the compensatory and anticipatory model representing the human pedal operation has been verified by driving simulator experiments with several real drivers. The comparison between computer simulations performed by determined model parameters with the experimental results confirm the correctness of this mathematical driver model and identified model parameters. Then the driver model is joined to a hybrid vehicle dynamics model and the moderate car following maneuver simulations with various driver parameters are conducted to investigate influences of driver parameters on vehicle dynamics response and fuel economy. Finally, major driver parameters involved in the longitudinal control of drivers are clarified.