起重机

Of or belonging to the phylum Nemertina.

螺旋起重机，螺旋千斤顶由螺旋杆运作的起重机

The acceleration profile of the crane motion is designed to induce minimum payload pendulation during transpo rt,while the deceleration stage is designed to ensure freed om of residual oscillation near the end of the transport,and to deliver the payload at the target point.The techniques induce payload pendulation at least one half ofan oscillation cycle or integer multiples during each of the acceleration and deceleration stages.Starr(1995)designed a symmetric two-step acceleration and deceleration profile to transfer a suspended object.The duration on the constant acceleration steps is assumed to be negligible relative to the period of the payload oscillation.A linear approximation method of the oscillation period is used to generate the two-step symmetric acceleration profile.

3.1投入成型技术，各种形式的投入shapers ， convolved参考命令，产生形投入指挥，驾驶起重机提出一套距离沿一套path.the加速度概况起重机议案旨在诱使最低载重pendulation期间transpo rt ，虽然减速阶段，目的是确保freed om残余振荡接近尾声的运输，并交付载荷到达目标point.the技巧诱使载荷pendulation至少一半ofan振荡周期或整数倍数。

Slewing mechanism is one of the most important mechanisms for crawler crane, of which dynamic characteristics affect the working performance of whole machine directly.

回转机构是履带起重机重要的机构之一，其动态特性直接影响整个起重机的工作性能。

The crawler crane is a kind of important construction equipment for foundation treatment by forced tamping method.

履带式起重机是强夯地基处理施工中不可缺少的一种主要施工设备，本文列举了履带式起重机在强夯地基处理施工中的常见事故。

It is studied that the responses of overhead crane when the trolly is running. The simulation of lifting load process, location of the trolly and stresses of structure by computer are discussed and after verified by the experiments, we have got distribution function of stresses in stucture of overhead crane under different load states and distribution functions of location of the trolly.

研究了小车运行时桥式起重机的动态响应，讨论了起重机吊重载荷过程、小车位移及桥式起重机主梁结构应力的计算机仿真，在得到实测数据的验证之后，通过计算机仿真得出不同载荷状态及不同小车位移分布下桥吊主梁结构应力的分布规律。

The research of this article provides the valuable method for design of the tower crane and consults for the same kind products.

本文在综述了塔式起重机设计及CAD技术的发展现状和前景的基础上，完成了塔式起重机计算机辅助设计平台的研究。

A brand-new jib-bridge luffing system of crane is brought out based on analysis of the limitation to handle containers of the portal crane.

摘要在分析门座起重机用于集装箱装卸作业的局限性的基础上，提出一种新型的起重机变幅系统。

The experimental system consists of a rotary mechanism and a luffing mechanism and is used for the simulation of luffing motion and rotating motion.

回转塔式起重机实验台由回转机构和变幅机构组成，模拟回转塔式起重机的变幅运动和回转运动。

So how does a crane manufacturer guarantee its crane arm won't extend too far, overbalancing the machine and putting workers at risk?

那么，一个起重机生产商怎么样保证其起重机的手臂不会扩展的太长，超重的机器不会使操作的工人受伤？

This paper presents an intelligent and rapid design system for stairs and plats of container crane based on the combination of the theory of knowledge based engineering with the design of stairs and plats of container crane. 3D parametric graphic software SolidWorks is redeveloped by program language Visual C++ which is object-oriented programming.

应用面向对象的程序设计语言Visual C++对三维参数化图形设计软件SolidWorks进行二次开发，将知识工程的思想与集装箱起重机梯子平台的设计相结合，开发出基于知识工程的集装箱起重机梯子平台智能快速设计系统(Intelligent and Rapid Design System for Stairs and Plats of Container Crane， IRDS-SPCC)。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。