高职院校汽车实训教学探讨

文章从实训环境、师资力量、仿真教学等几个方面就如何提高实训教学的质量和效率、有效提升学生的操作技能，培养出优秀汽车运用技术人才进行了一些探讨，以期对汽车专业人才培养提供一定的借鉴意义。     

Modelling the capacity of closely-spaced parallel runways using innovative approach procedures

This paper develops analytical models for calculating the ultimate arrival, departure, and mixed operation capacity of closely-spaced parallel runways. Each capacity is defined as the maximum number of corresponding aircraft operations accommodated during a given period of time (usually one or a quarter of an hour) under constant (i.e. sustained) demand for service. As combined, they enable the capacity coverage curve to be synthesized. In particular, the capacity model for arrivals assumes the use of two rather innovative approach procedures – the Staggered Approach Procedure (SGAP) and the Steeper Approach Procedure (SEAP) in combination with the baseline Conventional Approach Procedure (CNAP) under Instrument Meteorological Conditions (IMC) and Instrumental Flight Rules (IFR).The model for arrival capacity that aims to estimate potential of these procedures uses main inputs such as: the geometry of given parallel runways and innovative SGAP and SEAP, and baseline CNAP; the Air Traffic Control (ATC) minimum separation rules; aircraft fleet mix characterized by the wake-vortex categories; capability of using different ILS Glide (GS) angles; final approach speeds; and the arrival runway occupancy time. In addition, the model for departure capacity uses inputs that embrace: the ATC separation rules between successive departures; aircraft fleet mix; and corresponding runway occupancy times. Finally, the model for mixed operation capacity uses inputs such as: the ATC arrival–departure separation rules; corresponding runway occupancy times; aircraft fleet mix for each type of operations; and proportion of the arrival and departure demand.The models are applied to calculating the ultimate capacity of closely-spaced parallel runways at two large airports, one in Europe and other in the US, assuming safe use of innovative SGAP and SEAP in combination with CNAP under IMC. The output from the models consists of the corresponding capacities and their variations depending on particular inputs.     

新能源汽车轻量化途径及其评价

文章从新能源汽车轻量化途径及其评价的角度出发,对新能源汽车轻量化的必要性、实现途径、可替代材料进行分析,旨在重点阐述新能源汽车的整车轻量化研究方法及其优缺点,并从车身轻量化的角度说明新能源汽车未来的发展前景,希望通过此类专题研究可以启发新能源汽车的从业人员,在车身轻量化的基础上达成节能减排的目标。     

情景教学法及其在大学英语中的应用

情景教学法因其直观、考虑学生的学习兴趣和主动性的发挥等优点在英语教学中得到了广泛亲睐,但是任何一种教学法不可能放之四海而皆准,都有其限制与不足。当今国内大学英语教学中教无定法的呼声日益高涨,对于情景教学法的不足应当加以弥补。     

地方高校实践教师教学创新意识培养的途径研究

针对地方高校实践教师教学创新意识培养的途径研究,探索培养教师教学创新能力的有效途径,打破当前陈旧教学环境,唤醒教师不断创新的意识,将创新教学理念转化成为教师日常教学的行为和规范,用思想和行动去影响和教育学生,让学生更能适应新世纪激烈的竞争。     

在盘锦市干线公路上修建水泥路面的探讨

对比分析了“黑白”两种公路路面的优缺点,从技术可行性、经济可行性和资源情况等三个方面对比探讨了在盘锦市干线公路上修建水泥路面的可能性。     

Microscopic driving theory with oscillatory congested states: Model and empirical verification

The essential distinction between the Fundamental Diagram Approach (FDA) and Kerner’s three-phase theory (KTPT) is the existence of a unique gap–speed (or flow–density) relationship in the former class. In order to verify this relationship, empirical data are analyzed with the following findings: (1) linear relationship between the actual space gap and speed can be identified when the speed difference between vehicles approximates zero; (2) vehicles accelerate or decelerate around the desired space gap most of the time. To explain these phenomena, we propose that, in congested traffic flow, the space gap between two vehicles will oscillate around the desired space gap in the deterministic limit. This assumption is formulated in terms of a cellular automaton. In contrast to FDA and KTPT, the new model does not have any congested steady-state solution. Simulations under periodic and open boundary conditions reproduce the empirical findings of KTPT. Calibrating and validating the model to detector data produces results that are better than that of previous studies.     

接近信号机显示方式探讨

本文对《铁路技术管理规程》关于接近信号机的显示作了初步探讨，分析了类似的信号显示方式，提出相应的显示关系方案。     

ZPW-2000A轨道电路在单线半自动提速区段的应用

本文提出单线半自动闭塞区段设置双接近区段和接近信号机，接近区段采用ZPW-2000A无绝缘轨道电路，提高列车的运行速度和安全性能。     

复合式移动模架尾部吊挂系统设计探讨

尾部吊挂在已浇筑的混凝土梁面上走行的复合式移动模架因具备支腿自移功能,在国内外桥梁施工中得到大量应用,但此类移动模架的事故率也是相对较高的,且大多缘于吊挂系统的设计或加工缺陷。通过分析吊挂系统在走行过程中受到的多维度不断变化的弯、剪、扭、拉组合作用,结合实际使用中的经验教训,总结其计算、设计、制造及现场处理等方面需要注意的若干事项,并对照这些结论和建议,讨论几种常见的复合式移动模架吊挂系统设计方案的优缺点,以及在设计吊挂系统时动态地、相互关联地按照构件在使用中的真实情况研究其极限状态与破坏规律的重要性。