实际速度

The commonly-used capacity calculation approaches for ramp junctions are mostly based on the American HCM method, It had been approved that the headways for vehicles following the Weibull distribution function at on-ramp junctions in urban freeway system. The paper examined the critical headway and following time by the modified drew method and the survey traffic flow data on-site. The gap-acceptance capacity calculating model was developed for on-ramp junctions of urban freeway, and the numerical integration method was used to solving the model. Finally, the capacity values were obtained in condition of different mainline design speeds and different acceleration lane lengths.

针对目前国内外匝道连接段通行能力计算以美国HCM为主的现状和不足，研究发现城市快速路入口匝道连接段车头时距服从Weibull分布规律，利用改进的Drew方法及实际现场调查交通流数据确定了临界车头时距和随车时距，建立了城市快速路入口匝道连接段通行能力的间隙接受计算模型，并利用数值积分法进行计算和求解，从而得到了主线不同设计速度及不同加速车道长度条件下的城市快速路入口匝道连接段可能通行能力值。

Based on the detailed analyzing of impact system working process, the differential eguation of the system was got, and the mathematical model of the hydraulic impact system was builted, on basis of the mathematical model, By using of dynamic simulation function of Matlab ,the author has built the simulation model of the impact system based on software Simulink and run it after inputting the parameter ,the dynamic graph curve of impact velocity and presser of oil and position of knife rest were got, and the dynamic characteristic of impact system was analyzed,the simulated results are accorded with the fact,and some rational parameters can be found.

在对冲击式采煤机液压冲击系统工作过程进行详细分析的基础上，运用微分方程建模方法，建立了液压冲击系统的数学模型即系统的动态方程，并在该数学模型的基础上，采用Matlab中的Simulink动态仿真功能，建立了基于Simulink的冲击系统仿真模型，通过给定冲击式采煤机冲击系统的相关参数，对该系统进行仿真，得到了冲击式采煤机工作过程中冲击速度和油液压力以及刀架位移的变化曲线，进而对冲击系统的动态特性进行了分析，结果与实际情况较为吻合，并由此得出某些合理的参数。

The results of the model and field data of Xinjiang prove that this method is valid and practical for migration velocity analysis.

模型和新疆实际资料的试算表明该方法是一种有效和实用的偏移速度分析方法。

With wave equation, we performed crosswell wavefield modeling. Velocity model is constructed from two sonic logs. It is readily distinguished the different characteristics of timeversusdistance for direct, upgoing, and downgoing waves on the resulted section.

利用声波方程建立井间波场数值模拟计算公式，选取一对实际井的声波测井资料建立了速度模型，进行井间数值模拟，得到了合成记录，对记录波场进行分析，能够清楚地观察到上，下行反射波和直达波的时距特征。

Procecding from the view of system theory and making the actual require-ments as a condition in piling work ,the velocity parameter of unloaders was caculated by the use of ideal point method in comprehensive evaluation.At the same time .the total power was minmum and the productivity was maximum.

本文从系统理论的观点出发，以装卸桥在贮木场从事归楞作业的实际要求为约束条件，同时以装卸桥系统总功率大小和生产率最大为目标，采用综合评比法中的理想点法对装卸桥的速度参数进行优化计算。

A new study idea that makes the occupant injury prevention research and CAD/CAE technology on an integrate mathematical model by means of feature theories and feature design technologies was brought, and it is maybe useful if we study automobile passive safety on a new view of point.The conclusions of this thesis included that what are the main factors of airbag-related injuries and the preventive measures, based on the research of the relationships between injury parameters, such as HIC, chest acceleration, neck force, neck moment, femur axial force etc, and impact speed, belt-use, occupant size (50th and 5th), sitting position and so on. The thesis evaluated whether the effectiveness of the airbag can be increased by making the airbag adaptive to the crash conditions, and points out that the size of the ventilation hole has the dominating influence on the performance of the airbag and is a key factor for intelligent airbag, multi-stage and lower-power inflator can cost effectively minimize the risk of injury to occupants from crashes. It is important for the researchers of intelligent airbag to keep the small size unbelted occupants in focus and it is necessary to study deeply the influence of airbag fold patterns and the extremity out-of-position situation. These topics are important in the study of occupant injury prevention and vehicle safety design.

论文研究得出产生气囊损伤的主要原因和防护措施；在研究汽车碰撞速度、安全带使用情况、乘员的体型5~(th和50~、乘员乘坐的位置等不同事故条件作用下，乘员的头部、颈部、胸部和腿部损伤参数变化规律的基础上，论文从能量因素出发，深入研究了安全气囊卸载能力、气体发生器产气能力和气囊折叠对乘员损伤参数的影响，指出起卸载作用的排气孔其截面积是智能型安全气囊最重要的控制参数之一，以及采用降能展开或二次充气气囊有助于提高汽车安全防护性等重要结论；论文在参数分析的基严内容提要2 础上得出的智能型安全气囊应以不佩戴安全带的5乘员作为主要防护目标进行研究、有必要深入研究气囊折叠形式和司机处于极端离位状况时对损伤参数的影响等结论，对深入进行汽车乘员碰撞损伤研究和汽车安全性设计都具有重要的理论和工程实际意义。

Dynamic interaction of wheel-rail is studied by using DSAS software when Blue-Arrow power car, trail car,"SS8" locomotive and passenger car with "209" bogies pass through a curve with severe rail oblique crack in Guang-Shen railway, respectively. Results of the above cases are compared and analyzed. Based on these results, effect of track structure parameter and train speed on dynamic interaction of wheel and rail in curve track is discussed, and a set of synthetic and effective technology measure which eliminates or releases rail oblique crack is put forward, The results can be expected to provide theoretic basis and guidance for engineering practice.

运用DSAS软件，研究了&蓝剑&动车组动车、拖车、&SS8&机车和209转向架客车通过广深线某钢轨斜裂纹重伤曲线的轮轨动态相互作用，并对几种车型的计算结果进行了比较和分析；在此基础上，讨论与分析了轨道结构参数及行车速度对曲线轨道的轮轨动态相互作用的影响，从而提出了一套综合有效的抑制或减轻钢轨斜裂纹的技术措施，以期为工程实际提供理论依据和指导。

The application of this technique in data access object is implementd through repacking the interface between application program and database system.

现代数据管理几乎都是以数据库作为其核心的，同时，现实世界中越来越多的应用要求对数据的&定时&存取和对&短暂有效&数据的存取，实际操作越来越趋于复杂，软件的设计也越来越复杂，数据库访问和处理的速度已经越来越重要了，实时数据库在这种情况下提了出来。

The hordes of American who roll out of bed, slip into their Reeboks and run for an hour in the face of snarling dogs, potential muggers and hordes of Americans heading in the opposite direction on their Schwinn 10-speeds must wonder sometimes whether it's worth the aggravation after all , if a rash of recent books and articles like "The Exercise Myth" can be believed, the evidence that physical activity leads to a longer and healthier life is based on a flawed interpretation of cause and effect.

卷离床的美国人的群众，面对吼叫进入他们的短角羚之内下滑而且达 1 小时竞选狗，潜在的 muggers 和美国人的群众在他们的 Schwinn 10 上的相反方向中朝向-速度一定有时怀疑资讯科技是否是值在全部后的更恶化，如果一轻率的最近书和文章同类&练习神话&能被相信，实际的活动导致较长和健康生活的证据以因素和效果的有缺陷解释为基础。

Running for Your Life A Harvard study links exercise with longevity The hordes of American who roll out of bed, slip into their Reeboks and run for an hour in the face of snarling dogs, potential muggers and hordes of Americans heading in the opposite direction on their Schwinn 10-speeds must wonder sometimes whether it's worth the aggravation after all , if a rash of recent books and articles like "The Exercise Myth" can be believed, the evidence that physical activity leads to a longer and healthier life is based on a flawed interpretation of cause and effect.

为你的生活赛跑一项哈佛研究用长命联编练习卷离床的美国人的群众，面对吼叫进入他们的短角羚之内下滑而且达 1 小时竞选狗，潜在的 muggers 和美国人的群众在他们的 Schwinn 10 上的相反方向中朝向-速度一定有时怀疑资讯科技是否是值在全部后的更恶化，如果一轻率的最近书和文章同类&练习神话&能被相信，实际的活动导致较长和健康生活的证据以因素和效果的有缺陷解释为基础。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。