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英语原文共 18 页, 附录X 译文 《一种直齿和斜齿齿轮泵可变压力载荷测算方法的评估》 摘要 本文提出的是一个系统的齿轮泵外部齿间压力变化所引起的可变激励载荷计算方法。考虑到出现齿轮啮合的情况,压力和扭转力都是根据齿轮的角位置测算的。另外,本文提到了一种在笛卡尔坐标系上计算扭转力和压力的常规方法,该方法也同样适合应用于直齿和斜齿齿轮计算。首先,我们给出了齿轮旋转一周单个齿上压力载荷的计算方法,这样旋转一周时齿轮各个齿上的总载荷也就表明了。需要特殊注意的是文中关于螺旋齿轮的描述。在本文的示例中,我们把此方法运用于串联齿轮泵。该齿轮泵的特征是有两个阶段,一个阶段用直齿圆柱斜齿,另一个阶段用斜齿圆柱齿轮。准备好一个内置于齿轮泵的实验用的测定压力模型,并将本
英语原文共 11 页, 摘要 随着DrivAer模型的引入,越来越多的气动研究和CAE方法开发活动都基于这一详细的通用车身上展开。由于该模型的开放性,它不仅被学术界迅速采用,而且还被多家汽车原始委托生产厂商和CAE软件开发人员所应用。DrivAer提供了高质量的实验数据,可以验证现有的空气动力学CAE能力,并加速发展新的精密数值计算方法。 在过去的几十年里,SUV的注册数量,特别是在欧洲,已经明显地增加了。除此之外,这种车的特点是横截面积大、地面净空增加、车轮较大。DrivAer无法描述此类车辆。因此,需要扩展这种通用汽车的概念。为了进一步扩展DrivAer的可用性,提出了一种新的模型,即所谓的AeroSUV。AeroSUV的结构与一种DrivAer结构类似且代表了一款典型的中型SUV。引入的车辆几何结构能够承载现有驱动装置的某些部
英语原文共 6 页, 自助式食品订购系统。 摘要: 无线技术的现状以及无法预见的移动设备的出现,为商业应用奠定了广阔的基础。已经进行了一些预期的工作,以在食品系统的实施中采用这两种技术。但是,较早建立的食品订购系统显示出局限性,主要是在成本效益方面,允许自定义并支持向客户的实时反馈。开发的系统提高了服务质量和速度。在中央数据库中无线更新订单详细信息,并分别从客户的触摸板发送到厨房和发送到收银员。平板电脑设备具有的应用程序可通过节省时间和改善效果,降低人工费率和实时客户反馈来使餐厅的生活更轻松,准确性更高。 所开发的系统还具有“客户免税”的待遇,并且可以为餐馆中的客户提供广泛的设施,以便在订购食物时有用的菜单以及合适的菜单组合平板电脑上基于android的应用
英语原文共 23 页, WSN基于加权双曲的DV-Hop定位节点定位算法 摘要 节点定位,在无线传感器和参与者网络(WSAN)确定事件发生的地理位置这个过程中扮演着基础的作用,有助于其及时响应。本文介绍了WSAN中多跳不测距定位算法的性能评估,例如距离矢量跳(DV-Hop),改进的DV-Hop(IDV-Hop)和加权DV-Hop(WDV-Hop)。此外,我们提出了一种新的定位算法,将WDV-Hop与加权双曲定位算法(WH)合并,其中包括权重到相关矩阵目标节点(NOI)与参考节点(RN)之间的估计距离,提高了准确性和精度。作为性能指标,准确性,精度和计算复杂度都统计在内。算法分三部分进行评估,所有节点随机分布在给定区域中,改变RN的数量和网络中节点的密度以及节点的无线电覆盖范围。结果表明,在具有100个节点的网络中,WDV-Hop优于DV-Hop和IDV-Hop,即使RN
英语原文共 20 页, Challenges and Alternatives to Plastics Recycling in the Automotive Sector Abstract Plastics are increasingly a preferred material choice in designing and developing complex, consumer products, such as automobiles, because they are mouldable, lightweight, and are often perceived to be highly recyclable materials. However, actually recycling the heterogeneous plastics used in such durable items is challenging, and presents very different scenarios to how simple products, such as water bottles, are recovered via curbside or container recycling initiatives. While the technology exists to recycle plastics, their feasibility to do so from high level consumer or industrial applications is bounded by technological and economical restraints. Obstacles include the lack of market for recyclates, and the lack of cost efficient recovery infrastructures or processes. Furthermore, there is a knowledge gap between manufacturers, consumers, an
英语原文共 5 页, 英语译文共 6 页, 资料编号:[237215],资料为PDF文档或Word文档,PDF文档可免费转换为Word
英语原文共 7 页, 英语译文共 10 页, 资料编号:[237226],资料为PDF文档或Word文档,PDF文档可免费转换为Word
Mechanical Design Abstract: A machine is a combination of mechanisms and other components which transforms, transmits. Examples are engines, turbines, vehicles, hoists, printing presses, washing machines, and movie cameras. Many of the principles and methods of design that apply to machines also apply to manufactured articles that are not true machines. The term 'mechanical design' is used in a broader sense than 'machine design' to include their design. the motion and structural aspects and the provisions for retention and enclosure are considerations in mechanical design. Applications occur in the field of mechanical engineering, and in other engineering fields as well, all of which require mechanical devices, such as switches, cams, valves, vessels, and mixers. Keywords: Mechanical Design mechanisms Design Process The Design Process Designing starts with a need real Existing apparatus may need improvements in durability, efficiency, weight, speed, or cost. New
Single-chip SCM is also known as micro-controller (Microcontroller Unit), commonly used letters of the acronym MCU that it was first used in industrial control. Only a single chip by the CPU chip developed from a dedicated processor. The first design is by a large number of peripherals and CPU on a chip in the computer system, smaller, more easily integrated into a complex and demanding on the volume control device which. INTELsZ80 is the first designed in accordance with this idea processor, then on the development of microcontroller and dedicated processors have parted ways. Are 8-bit microcontroller early or4 bits. One of the most successful is the INTEL 8031, for a simple, reliable and good performance was a lot of praise. Then developed in 8031 out of MCS51 MCU Systems. SCM systems based on this system until now is still widely used. With the increased requirements of industrial control field, began a 16-bit microcontroller, because the cost is not satisfactory but
英语原文共 9 页, 硼扩散硬化TC21-DT钛合金与陶瓷结合剂CBN砂轮在高速磨削下的磨削特性 摘要:一项寻求硼扩散硬化TC21-DT钛合金与陶瓷结合剂CBN砂轮在高速磨削下的磨削特性调查已经实施。测量磨削力和温度以及地面表面的形态特性检查。结果表明,常规磨削速度,材料去除主要是由耕作加上有些剪切决定的。对高速磨削过程中, 由于钛基体和硬质相颗粒之间不同的机械性能,在主要变形区(PDZ)应变梯度效应的似乎出现。此外,当磨削速度增加到120 m / s,芯片形成的剪切过程占了积极作用,导致相当大的改善地面表面粗糙度。此外,在磨削过程中,提供在PDZ的比磨削能的建模,并发现由模型预测出的一般趋势与实验调查结果是一样的。 关键词:TC21-DT钛合金 稀土渗硼 高速磨削 陶瓷CBN砂轮 1、介绍 由于低密度、高韧性、高强度重量
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