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期刊论文 3

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2011 1

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罗特曼透镜；微型化；多波束；波束形成器；无线通信 1

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Effects of leakage and friction on the miniaturization of a Wankel compressor

Yilin ZHANG, Wen WANG

《能源前沿（英文）》 2011年 第5卷 第1期   页码 83-92 doi: 10.1007/s11708-010-0125-7

摘要： This paper presents a numerical simulation of the performance of a meso-scale Wankel compressor and discusses the factors affecting its miniaturization. The discussion is related to the effect of leakage and friction on the design limit (cooling capacity and dimension) of the meso Wankel compressor. In the simulation, the main leakage comes from the gaps between the rotor and the endplates as well as between the seal apex and the cylinder. The largest friction originates from the clearance among the end face of the eccentric shaft, the end faces of the rotor, and the endplates. The decreasing cooling capacity of the meso Wankel compressor increases the proportion of leakage to displacement and causes the coefficient of performance COP and the mechanical efficiency to decrease. The rational design cooling capacity limit for the meso-scale Wankel compressor is approximately 4 W.

关键词： meso-scale     Wankel compressor     leakage     friction    

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Surgical robotics: A look-back of latest advancement and bio-inspired ways to tackle existing challenges

Yang LIU, Jing LIU

《机械工程前沿（英文）》 2012年 第7卷 第4期   页码 376-384 doi: 10.1007/s11465-012-0352-1

摘要：

This article is dedicated to present a review on existing challenges and latest developments in surgical robotics in attempts to overcome the obstacles lying behind. Rather than to perform an exhaustive evaluation, we would emphasize more on the new insight by digesting the emerging bio-inspired surgical technologies with potentials to revolutionize the field. Typical approaches, possible applications, advantages and technical challenges were discussed. Evolutions of surgical robotics and future trends were analyzed. It can be found that, the major difficulties in the field of surgical robots may not be properly addressed by only using conventional approaches. As an alternative, bio-inspired methods or materials may shed light on new innovations. While endeavors to deal with existing strategies still need to be made, attentions should be paid to also borrow ideas from nature.

关键词： minimally invasive surgery     surgical robotics     haptic feedback     miniaturization     bio-inspiration     bionics    

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微型罗特曼透镜在无线通信中的应用 Research Articles

Bao-hua SUN, Qiu-yan LIANG, Gao-nan ZHOU

《信息与电子工程前沿（英文）》 2020年 第21卷 第1期   页码 144-158 doi: 10.1631/FITEE.1900501

摘要： 罗特曼透镜是一种具有实时延迟特性、多波束性能和宽带等优点的波束成形网络，在当今无线通信系统中得到广泛应用。然而，在无线通信系统中，传统罗特曼透镜尺寸相当大，可能会影响其与基站天线的集成。介绍3种微型化罗特曼透镜技术（切比雪夫阻抗变换器、功率分配器和带能量分配槽的截断端口）设计透镜，减小端口尺寸，从而减小罗特曼透镜所占总面积。仿真和测量结果表明，该方法可实现透镜主体与馈线之间良好的阻抗匹配。利用该带能量分配槽的截断端口，可大大减小罗特曼透镜尺寸，同时不降低透镜性能或增加生产成本。此外，研究了该微型罗特曼透镜在无线通信系统中两种可能的应用。罗特曼透镜不仅可沿阵列端口提供多个相位差信号实现多波束，还可生成平顶辐射等高性能成形波束。

关键词： 罗特曼透镜；微型化；多波束；波束形成器；无线通信    

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标题 作者 时间 类型 操作

Effects of leakage and friction on the miniaturization of a Wankel compressor

Yilin ZHANG, Wen WANG

期刊论文

Surgical robotics: A look-back of latest advancement and bio-inspired ways to tackle existing challenges

Yang LIU, Jing LIU

期刊论文

微型罗特曼透镜在无线通信中的应用

Bao-hua SUN, Qiu-yan LIANG, Gao-nan ZHOU

期刊论文