With the continuous development of economy, communication is increasing between China and overseas, and business activities are becoming more and more frequent. In this process, foreign trade English plays an important role. Foreign trade English is unique, professional and practical. Under different scenes of foreign trade, English words can express different meanings. In the course of trade, foreign trade English can help both of parties to communicate, and can achieve the translation of language, the interpretation of contract, the understanding of letter and so on. In the process of language communication and reading important documents, we need a solid foundation of English language and profound foreign cultural background, and have a strong ability to deal with the professional knowledge of international trade and the use of English vocabulary. The characteristics of foreign trade English language are analyzed in terms of vocabulary, style and grammar. At the same time, in the process of language understanding and translation, we need to meet the requirements of real-time. With the frequent exchange of foreign trade between our country and other countries, a large number of English documents will be produced, the relevant departments have put forward higher requirements for the accuracy of these documents and real time of these documents, the traditional manual translation can not meet the growing demand for foreign trade translation. With the help of computer aided-translation software memoQ, we help people do auxiliary translation, therefore, it can reduce translator’s burden and improve the accuracy of translation and efficiency of translation. We select a large number of texts and adopt memoQ software to translate, so as to analyze the role of computer-aided translation software in the translation process of English documents.
Inverse dynamic equations of the 2UPS-2RPS mechanism are formulated by utilizing the virtual work principle. Kinematic analysis of the mechanism is presented, on the basis of which the Jacobian matrices of the limbs and the mechanism are deduced. By combining the dynamics of the limbs and the moving-platform, the inverse dynamic model of the mechanism is obtained. Finally a computer simulation is carried out to demonstrate the dynamic analysis of the moving platform.
This paper presents a simple and systematic modular approach for kinematic analysis of complicated Parallel Kinematic Manipulators (in short, PKMs) which coupled degrees are more than 2. (1) Single open chains (in short, SOCs) may be regarded as the basic modules of a PKM. Any PKM can always be decomposed automatically into a set of ordered SOCs, and these SOCs can also be used to recognize the basic kinematic chains contained in it. (2) The kinematic analysis algorithms and the compatibility conditions of the SOC modules are offered. (3) Directly applying the above SOC kinematic modules, the kinematic equations of a PKM can be automatically established. (4) In order to solve kinematic equations of complicated parallel manipulators which coupled degrees are more than 2, a new searching algorithm which requires no initial guess has been presented. The procedural approach is demonstrated in parallel manipulators.
This series of papers design a multi-link load balancing mechanism for the Planetary Gearings with arbitrary number of planet gears. Based on the study of SGP load balancing mechanisms, this paper analyzed the relations between the function and kinematic structure of the multilink load balancing mechanism, and presented the topological characteristics and parameters of the kinematic chains suited for load balancing mechanism. Those topological parameters depend on the number of planet gears. In the type synthesis for the case of six planet gears, the kinematic chains with five degrees of freedom and eighteen links were enumerated according to the topological characteristics. The resulting mechanisms were 15 candidate multi-link load balancing mechanism.
This paper is the second of a series of two papers which designed a new type of load balancing mechanisms for planetary gearings with arbitrary number of planets. In this paper the common expression of the non-uniform load share factor was deduced, and a function parameter:force-arm factor and their solution was given. That makes it possible that the dimensions and the ability of load equilibrium of Multi-Link Load Balancing Mechanisms can be determined. The criteria of optimum load balancing Mechanisms selection were set up with consider of the effects of turning pair clearances, and optimum mechanisms were selected among the 15 candidates obtained in Part 1. Finally, it was demonstrated that the optimum multi-link load balancing mechanisms for arbitrary number of planets had the similar topological structures and same function and performence of load equilibrium.
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