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The article has analyzed the domestic and international present research status and development trend of the electric and hybrid electric vehicles (HEV). Considering actual scientific research, according to the characteristic and environment requirement of all-terrain vehicle(ATV), the principle of elected and designed component parts for Powertrain Coupling system of ATV, and the demands of performance parameter of power, torque and speed of moving ATV, this article studies on the performance parameter and control strategy of powertrain coupling system of engine, electric motor and the storage battery. The optimization matching, the modeling simulation and the experiment have been carried out. The article proposes a new multipurpose design and development plan on the powertrain coupling system in electric and HEV for ATVs. It introduces a new transmission system based on few-tooth -deference planetary gear powertrain coupling system with biased bent shaft (FPS), which have been applied in powertrain coupling system of the multipurpose light electric and HEV for ATV. The research results show that the proposed FPS meets the performance requirement for entire vehicle (ATV), especially in regard infinitely variable speed. The method and the obtained result provide the basis design theory for the low-speed vehicles (that is, agricultural vehicles) and multipurpose light electric and HEVs. The technology has been applied to ATVs in Ningbo Saiting Electric Bicycle Science & Technology CO., LTD, and is applying for nation invention patent. Keywords-hybrid electric vehicle; powertrain coupling system; few-tooth -deference planetary gear transmission; optimize matching I.

With various types of 3D display, the same 3D content may present different visual experience qualities. To achieve the perfect 3D visual experience, 3D video rendering adaptation is highly desired. This paper surveys the state-of-the-art 3D video rendering adaption technologies and further summarizes the remaining open challenges. First, we explain the basic 3D vision principle which provides 3D video rendering adaptation rules. Second, based on the outline of disparity processing, we survey two categories of 3D video rendering adaptation technologies: (1) video size and depth range adaptation; (2) viewpoint adaptation. For video size and depth range adaptation, the linear scaling based 3D video super-resolution, disparity transform and content-aware 3D video retargeting are specifically overviewed. Finally, we point out the open issues to be investigated in the area of 3D video rendering adaptation. Graphical AbstractKeywords 3D video rendering adaptation Á 3D video resize Á Disparity transform Á 3D video retargeting Á Viewpoint adaptation 1 Introduction

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