摘要：Using the supercavitation phenomenon is necessary to reach high velocities underwater. Supercavitation can be achieved in two ways: natural and artificial. In this article, the simulation of flows around a torpedo was studied naturally and artificially. The validity of simulation using theoretical and practical data in the natural and artificial phases was evaluated. Results showed that the simulations were consistent with the laboratory results. The results in different injection coefficient rates, injection angles, and cavitation numbers were studied. The obtained results showed the importance of cavitation number, injection rate coefficient, and injection angle in cavity shape. At the final level, determining the performance conditions using the Design of Experiment (DOE) method was emphasized, and the performance of cavitation number, injection rate coefficient, and injection angle in drag and lift coefficient was studied. The increase in injection angle in the low injection rate coefficient resulted in a diminished drag coefficient and that in the high injection rate coefficient resulted in an enhanced drag coefficient.

摘要：在中国第33次南极科学考察中,自然资源部中国地质调查局下属的广州海洋地质调查局"海洋六号"船于2016年12月到2017年2月在南极半岛南设得兰海沟海域获得了1 400多km的高分辨率多道地震资料。资料存在的主要噪声为异常高能量干扰和多次波干扰,为了高保真的压制噪声,在最大限度地保护有效信号的前提下充分地压制噪声,设计了基于lift(Linear Interference Filter Technique)思想的噪声压制方法。利用这套方法分别针对异常高能量干扰和多次波干扰进行了压制,压制结果显示,噪声得到了很好的压制,有效信号得到了很好的保护,达到了高保真去噪的目的。

摘要：Optimization of airfoil characteristics such as lift and drag is essential for high efficiency wind turbine blade design. In this research, effects of airfoil lift and drag on blade power coefficients were investigated by using of wind turbine blade design software, PROPID. Firstly, a wind turbine blade of 2MW class was designed with DU-serics airfoils in the inner part and with aNACA series airfoil as a main airfoil in the outer part. lift distribution was set to have near L/D maximum at each span station. Then, lift and drag curves were modified to observe effect of L/D variation. Drag and lift change with constant L/D on blade power coefficient was also studied for sensitivity investigation. Each case was optimized with Newtonian iteration incorporated in PROPID. High design lift coefficient results in less chord length and twist angle to maintain same aerodynamic load level. And, power coefficient wasn＇t improved much with high L/D. During the process, optimal inputs such as lift distribution, design lift and induction factors were suggested. As results, it was found that L/D maximization was important to obtain high efficiency. For the L/D maximization, lift maximization was important to minimize structural weight, but decreasing drag didn＇t affect the blade shape.

摘要：美国轻质材料制造创新机构(lift)的第三个技术项目将聚焦钛合金,关注综合计算材料工程,旨在开发计算机模型,能够减少50%的材料开发、组件设计和制造成本与时间。此外,新的计算工具将有助于制造更好的组件。项目由GE航空和俄亥俄州立大学牵头,首先将聚焦计算机分析学的提升。

摘要：用熔融的铁铸造零件是一个标准工艺，但最近又处于发展前沿。底特律的lift（未来轻合金发展）公司将熔炼工艺创新作为它的首要技术发展项目。密歇根州的Grede公司和密歇根理工大学将重点研究在于减少汽车变速器差速器壳体中的金属使用量，而设计与Grede和Eaton提供的核心产品相似。通过整合和改善不同合金的制造方法，

摘要：通讯方式是影响电梯控制系统能否正常、稳定运行的关键因素,该文采用了一种基于CAN总线的CANopen lift电梯专用高层协议以提高通讯的效率和可靠性．并根据此协议设计出电梯控制系统的部分硬件与软件．

摘要：日前，施耐德电气正式发布全新ATV lift电梯专用变频器。该变频器采用电梯专用菜单、中文菜单面板、静态自学习功能、安全功能及整体提高的硬件性能等一系列人性化设计，使电梯运行的安全性和操作的便捷性都有了很大提高。

摘要：该产品采用重载型钢结构设计，配置锻制重载可旋转吊钩，三工位可调，可以获得一般起重机无法到达的起重载荷；选用镀铬油缸及活塞，有效地延长了使用寿命；独特的双作用快速提升油缸技术和可折叠设计，操作方便省力，便于存放运输；具有过载安全阀，出厂前125％过载测试，严格执行CE安全标准，可使客户放心使用。

摘要：作为唯一的将撑举功能与完全折叠设计结合在一起的混合自行车车架（由塑料和金属制成）,可折叠设计是Foldable lift Bike Stand的特点.停车架采用了混合结构,大部分由强大耐用的塑料复合材料制成,内部用金属框架加固,使支架柄承重高达200kg/440Lb.内置手柄使自行车撑的运输方便快捷,而完全折叠的设计可以使之在家中或运输过程中节省大量空间.

摘要：最适于乘客电梯用途的专门设计、全系列的制动单元内置。